Journal articles: 'Constant voltage mode'

1

Choi, Jongmoon, Jungwon Kim, and Seungkwan Hong. "Staged voltage mode in membrane capacitive deionization: Comparison with constant voltage and constant current modes." Desalination 479 (April 2020): 114327. http://dx.doi.org/10.1016/j.desal.2020.114327.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Jiao, Junsheng. "Sliding Mode Control for Stabilizing of Boost Converter in a Solid Oxide Fuel Cell." Cybernetics and Information Technologies 13, no. 4 (December 1, 2013): 139–47. http://dx.doi.org/10.2478/cait-2013-0060.

Full text

Abstract:

Abstract The output voltage of Solid Oxide Fuel Cell (SOFC) is usually changed with the temperature and hydrogen flow rate. Since the fuel cell can generate a wide range of voltages and currents at the terminals, as a consequence, a constant DC voltage and function cannot be maintained by itself as a DC voltage power supply source. To solve this problem, a simple SOFC electrochemical model is introduced to control the output voltage. The Sliding Mode Control (SMC) is used to control the output voltage of the DC-DC converter for maintaining the constant DC voltage when the temperature and hydrogen flow rate are changed. By the simulation results it can be seen that the SMC technique has improved the transient response and reduced the steady state error of DC voltage.

APA, Harvard, Vancouver, ISO, and other styles

3

Heidinger, Michael, Qihao Xia, Christoph Simon, Fabian Denk, Santiago Eizaguirre, Rainer Kling, and Wolfgang Heering. "Current Mode Control of a Series LC Converter Supporting Constant Current, Constant Voltage (CCCV)." Energies 12, no. 14 (July 20, 2019): 2793. http://dx.doi.org/10.3390/en12142793.

Full text

Abstract:

This paper introduces a control algorithm for soft-switching series LC converters. The conventional voltage-to-voltage controller is split into a master and a slave controller. The master controller implements constant current, constant voltage (CCCV) control, required for demanding applications, for example, lithium battery charging or laboratory power supplies. It defines the set-current for the open-loop current slave controller, which generates the pulse width modulation (PWM) parameters. The power supply achieves fast large-signal responses, e.g., from 5 V to 24 V , where 95% of the target value is reached in less than 400 s . The design is evaluated extensively in simulation and on a prototype. A match between simulation and measurement is achieved.

APA, Harvard, Vancouver, ISO, and other styles

4

Zhang, Jin Long, Deng Hua Li, Jing Min Gao, and Zhi Zhong Wu. "A Study of Super-Capacitors Charge Efficiency." Applied Mechanics and Materials 427-429 (September 2013): 778–82. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.778.

Full text

Abstract:

In this article, the arithmetic model of super-capacitors in photovoltaic system and more charge modes, especially constant power charge mode, was studied. A numerical way of calculating the charge efficiency was introduced. The maximum charge efficiency of super-capacitors when its output voltage raises from zero to the rated voltage under constant power charge mode was presented. The multi-stage charge efficiency curves was retrieved, which indicates that the constant power charging mode is more suitable. The constant power control charge strategy using two-stage Buck-Boost converter to charge super-capacitors was proposed. The simulation results show that this strategy effectively ensure the performance of the system.

APA, Harvard, Vancouver, ISO, and other styles

5

Amit Kumar De and Shobhana Dey. "Establishment of transition point in operating mode for Constant Current Constant Voltage (CC-CV) charging of Li-ion batteries." World Journal of Advanced Engineering Technology and Sciences 3, no. 1 (August 30, 2021): 072–83. http://dx.doi.org/10.30574/wjaets.2021.3.1.0053.

Full text

Abstract:

The present-day Li-ion batteries when operated, needs precise monitoring of the charging voltage. Several charging techniques have been tested so far with varying degrees of success. One of the most widely used charging techniques is the CC-CV (constant current constant voltage) charging. When performing this, the safety considerations must be maintained with respect to over voltage charging which is a very common problem during constant current charging. In order to prevent over voltage charging, the charging mode must be then shifted from CC to CV mode. So, this transition point of the charging mode from CC to CV is very crucial for the safe operation and health of the battery in the long run. The problem is that, this transition point doesn’t remain the same for the battery. So, in this paper the factors on which it depends are discussed and a Li-ion battery was charged in a few different charging rates using the CC-CV technique to demonstrate the process.

APA, Harvard, Vancouver, ISO, and other styles

6

Choi, June-Heang, Hyungtak Kim, Hyuk-Kee Sung, and Ho-Young Cha. "Investigation of Stability and Power Consumption of an AlGaN/GaN Heterostructure Hydrogen Gas Sensor Using Different Bias Conditions." Sensors 19, no. 24 (December 16, 2019): 5549. http://dx.doi.org/10.3390/s19245549.

Full text

Abstract:

A Pd-functionalized hydrogen gas sensor was fabricated on an AlGaN/GaN-on-Si heterostructure platform. The AlGaN layer under the Pd catalyst area was partially recessed by plasma etching, which resulted in a low standby current level enhancing the sensor response. Sensor stability and power consumption depending on operation conditions were carefully investigated using two different bias modes: constant voltage bias mode and constant current bias mode. From the stability point of view, high voltage operation is better than low voltage operation for the constant voltage mode of operation, whereas low current operation is preferred over high current operation for the constant current mode of operation. That is, stable operation with lower standby power consumption can be achieved with the constant current bias operation. The fabricated AlGaN/GaN-on-Si hydrogen sensor exhibited excellent sensing characteristics; a response of 120% with a response time of < 0.4 s at a bias current density of 1 mA/mm at 200 °C. The standby power consumption was only 0.54 W/cm2 for a sensing catalyst area of 100 × 24 μm2.

APA, Harvard, Vancouver, ISO, and other styles

7

Monsalve-Rueda, Miguel, John E. Candelo-Becerra, and Fredy E. Hoyos. "Dynamic Behavior of a Sliding-Mode Control Based on a Washout Filter with Constant Impedance and Nonlinear Constant Power Loads." Applied Sciences 9, no. 21 (October 26, 2019): 4548. http://dx.doi.org/10.3390/app9214548.

Full text

Abstract:

Power converters (PCs) with their control techniques help regulate voltages of nodes in microgrids with different types of loads such as resistive, inductive, nonlinear, constant power, or critical loads. However, constant power loads (CPLs) affect the stability of the voltage in the output of PCs and are usually difficult to regulate with traditional control techniques. The sliding-mode control (SMC) with the washout filter technique has been recently proposed to address this issue, but studies that consider the phenomenon and parameters present in real systems are required. Therefore, this paper focuses on evaluating the dynamic behavior of an SMC based on a washout filter using three different loads: A constant impedance load (CIL), a nonlinear CPL, and a combination of CIL and CPL. The CIL considered a resistance connected to the circuit, whereas the nonlinear CPL was designed by using a buck converter with zero average dynamics and fixed-point induction control techniques (ZAD-FPIC). The tests consisted of creating some variations in the reference signals to identify the output voltage and the error that the control brings according to the different loads. Besides, this study focuses on representing the dynamic behavior of signals when loads change, considering quantization effects, system discretization, delay effects, and parasitic resistors. Additionally, bifurcation diagrams are created by changing the control parameter k and plotting the regulated voltage and the error produced in the output signals. To illustrate the advantages of the SMC with the washout filter technique, a comparison was made with other techniques such as the proportional–integral–derivative (PID) and conventional SMC by varying the load. The results showed that SMC with the washout filter technique was superior to the PID and the conventional SMC because it stabilizes the signal faster and has a low steady-state error. Additionally, the control system regulates well the output voltage with the three types of load and the system remains stable when changing the parameter k for values greater than 1, with a low error in the steady-state operation.

APA, Harvard, Vancouver, ISO, and other styles

8

Bityukov, V. K., N. G. Mikhnevich, and V. A. Petrov. "Negative Output Voltage Ripples of Bipolar DC–DC Converter LM27762 near Maximum Input Voltage." Russian Technological Journal 7, no. 4 (August 11, 2019): 31–43. http://dx.doi.org/10.32362/2500-316x-2019-7-4-31-43.

Full text

Abstract:

The paper presents the results of studies of the operation of the inverting DC–DC converter with charge pump and LDO, which are part of the combined bipolar secondary power supply LM27762, at the near to maximum input voltage of 5.5 V and an output voltage of –4.9 V. The ripple voltages were measured at various load currents from 10 to 250 mA at the positive pole of the flying capacitor, at the output of the charge pump system and at the output of the microcircuit. It was shown for the first time on the basis of the obtained information that at low load currents up to about 107 mA the charge pump system operates in the burst mode, and at currents greater than 109 mA – in the charge pump mode with a constant frequency. The results do not confirm the information in the documentation on the microcircuit that, at themaximum input voltage of 5.5 V, the charge pump can enter the PWM mode in hot conditions. When working in burst mode, the presence of LDO in the LM27762 chip reduces the ripples of the negative voltage at the output. However, they significantly exceed the values given in the documentation on the chip. During switching to the constant–frequency mode, the level of negative voltage ripples at the output of the microcircuit decreases sharply, but it increases with further increase of the load current and exceeds the values given in the documentation.

APA, Harvard, Vancouver, ISO, and other styles

9

Yang, Jia Zhi, Sheng Li Yi, Fei Yang, Cun Bo Jiang, Xi Le Wang, and Fan Yang. "Fly-Back Mode Constant Current LED Driver." Applied Mechanics and Materials 530-531 (February 2014): 1093–99. http://dx.doi.org/10.4028/www.scientific.net/amm.530-531.1093.

Full text

Abstract:

LED driver plays an important role in unleashing many advantages of LED, such as high efficiency, long life-time. A constant current fly-back LED driver based on TOP222 is designed in this paper, and the transformer of the constant current power supply and the constant current feedback circuit are deeply researched. The experiment shows that, the output current of the LED driver is 1A, the output power is 10W, the power supply works in constant voltage mode within the low load situation. The result shows that the driver featured with good stability, constant-current characteristic, and high efficiency, is capable for driving LED.

APA, Harvard, Vancouver, ISO, and other styles

10

Zhong, Shun, and Ziqian Shen. "A Hybrid Constant On-Time Mode for Buck Circuits." Electronics 10, no. 8 (April 14, 2021): 930. http://dx.doi.org/10.3390/electronics10080930.

Full text

Abstract:

To achieve a designed and fixed operating frequency for a controller with high dynamic performance and a high load capacity, a hybrid constant on-time (COT) voltage mode for a Buck circuit is proposed and discussed in this paper. The proposed hybrid strategy is a combination of the classical COT method, a dynamic reference voltage technology and a proportional–differential (PD) module. The workflow is demonstrated in brief, simulations of a Buck circuit with the proposed hybrid COT mode are conducted and comparisons with developed pulse-width modulation (PWM) technology and the hysteresis mode are made. The results show that, with the help of the proposed control scheme, impressive performance from the Buck circuit can be expected. The operating frequency can be fixed well by the hybrid technology without losses of performance and robustness in steady state and will not jump much even with the sudden change of the inputs and the load. The proposed control strategy contributes to the foundation of circuit design and optimization.

APA, Harvard, Vancouver, ISO, and other styles

11

Cheng, Li-Ye, Chen Sun, and Zhen-Wei Zhou. "Selectable Output Voltage High Efficiency Boost Converter." Journal of Circuits, Systems and Computers 27, no. 11 (June 6, 2018): 1850178. http://dx.doi.org/10.1142/s0218126618501785.

Full text

Abstract:

The paper proposed a high efficiency boost converter with constant voltage (CV) and constant current (CC) modes. The selection of CV or CC working mode is based on the requirement, and the transient time from CV to CC mode is 230[Formula: see text][Formula: see text]s. The boost converter is particularly for the use of Li-ion battery portable devices. High efficiency is obtained by sleep/burst mode under light load and pulse width modulation (PWM) mode under heavy load. The quiescent current of the whole chip can be down to 6[Formula: see text][Formula: see text]A when the converter enters the standby mode. The converter has been made of 0.35[Formula: see text][Formula: see text]m complementary metal-oxide semiconductor (CMOS) process. Experimental results show that the peak efficiency is 98.2% at a 1.5[Formula: see text]A output current and a 4.2[Formula: see text]V input voltage.

APA, Harvard, Vancouver, ISO, and other styles

12

Yang, Yanbo, Tiancai Ma, Boyu Du, Weikang Lin, and Naiyuan Yao. "Investigation on the Operating Conditions of Proton Exchange Membrane Fuel Cell Based on Constant Voltage Cold Start Mode." Energies 14, no. 3 (January 28, 2021): 660. http://dx.doi.org/10.3390/en14030660.

Full text

Abstract:

The cold start property is one of the main factors restricting the fuel cell application in the automotive field. The constant voltage cold start method of the fuel cell works under low start voltage and produces high heat, which can shorten the start-up time of the fuel cell at low temperature and has the opportunity to be applied to fuel cell vehicles. Meanwhile, in the constant voltage cold start mode, the fuel cell needs to operate under a large current, and more water is generated during the start-up process. Thus, the optimization of operating conditions for the constant voltage cold start is particularly important. However, there are relatively few studies on the optimization of operating conditions for the constant voltage cold start with a single-cell voltage less than 0.3 V. In this work, the cold start experiment of the fuel cell with constant voltage is carried out. According to the cold start experiment, the different cold start voltage, back-pressure, and the inlet flow rate are examined. Based on the experiment data, the operating conditions have a great influence on the cold start property of the fuel cell and the optimized operating conditions of the constant voltage cold start are obtained.

APA, Harvard, Vancouver, ISO, and other styles

13

Bityukov, V. K., V. A. Petrov, and A. A. Sotnikova. "Operation of an inverting DC-DC converter with charge pumping and LDO in the LM 27762 microcircuit." Journal of «Almaz – Antey» Air and Space Defence Corporation, no. 1 (March 30, 2019): 35–43. http://dx.doi.org/10.38013/2542-0542-2019-1-35-43.

Full text

Abstract:

The paper focuses on the study of operation of an inverting DC-DC converter with charge pumping and LDO, which are the part of the combined bipolar secondary power supply LM 27762. The measurements covered two modes amply included in the range of normalized parameters with input voltages equal to 3.5 and 5.5 V, and output voltages 1.8 and 4.9 V, respectively, as well as the mode with an input voltage of 5.0 V and an output voltage 4.7 V, with a difference in the input and output voltage not exceeding the normalized limit of the voltage drop across LDO . Pulsations of voltages were measured at various load currents from 15 to 250 mA at the positive and negative poles of the flying capacitor, at the output of the charge pumping system and, in the latter case, also at the output of the microcircuit. Based on the results obtained, it was shown for the first time how at low load currents up to about 100 mA the charge pumping system operates in the burst mode, and at higher currents, it operates in the charge pumping mode with a constant frequency

APA, Harvard, Vancouver, ISO, and other styles

14

Xi, Yang, Ai Qian, Huang Jiantao, and An Yiran. "Application of Multipoint DC Voltage Control in VSC-MTDC System." Journal of Electrical and Computer Engineering 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/257387.

Full text

Abstract:

The voltage-source-converter- (VSC-) based multiterminal VSC-HVDC power transmission system (VSC-MTDC) is an ideal approach to connect wind farm with power grid. Analyzing the characteristics of doubly fed induction generators as well as the basic principle and the control strategy of VSC-MTDC, a multiterminal DC voltage control strategy suitable for wind farm connected with VSC-MTDC is proposed. By use of PSCAD/EMTDC, the proposed control strategy is simulated, and simulation results show that using the proposed control strategy the conversion between constant power control mode and constant DC voltage control mode can be automatically implemented; thus the DC voltage stability control and reliable power output of wind farm can be ensured after the fault-caused outage of converter station controlled by constant DC voltage and under other faults. The simulation result shows that the model can fulfill multiterminal power transmission and fast response control.

APA, Harvard, Vancouver, ISO, and other styles

15

Huang, S., Peijun Liu, Quanzhen Duan, Yuemin Ding, and Zhen Meng. "A −4–4 V Input Common-Mode Range Bidirectional Current Shunt Monitor." Journal of Circuits, Systems and Computers 29, no. 14 (March 25, 2020): 2050221. http://dx.doi.org/10.1142/s0218126620502217.

Full text

Abstract:

This study describes a novel bidirectional current shunt monitor (CSM) circuit operating at both positive and negative common-mode (CM) voltages. The proposed CSM circuit mainly consists of two comparators, three error amplifiers, several current-mirror transistors and a few resistors. One comparator is used to detect current flowing direction, and the other one is utilized to ensure good operation of CSM circuit with both positive and negative CM voltages. The proposed CSM circuit has been implemented in SMIC 0.18[Formula: see text][Formula: see text]m standard CMOS process and its performances have been verified by simulations. The simulated results show that the proposed CSM circuit, at a supply voltage of 5[Formula: see text]V and with an input CM voltage range from [Formula: see text] to 4[Formula: see text]V, can sense a voltage difference of 4–40[Formula: see text]mV and keep a constant scaled gain of 100[Formula: see text]V/V. The gain error is less than 0.65% and the common-mode rejection ratio (CMRR) is higher than 130[Formula: see text]dB at 1[Formula: see text]kHz. Simulation results show that the output voltage of CSM circuit varies linearly with the CSM input sense voltage.

APA, Harvard, Vancouver, ISO, and other styles

16

Lu, Sheng, Li Tang, Xi Zhi Jiang, Ze Xin Wang, and Jing Chen. "Growth Characteristics, Microstructure and Corrosion Resistance of Micro-Arc Oxidation Coatings Fabricated on ZK60 Mg Alloy under Two Steps Voltage-Increasing Mode." Advanced Materials Research 337 (September 2011): 101–5. http://dx.doi.org/10.4028/www.scientific.net/amr.337.101.

Full text

Abstract:

A concept of two steps voltage increasing mode derived from constant voltage mode was developed to fabricate micro-arc oxidation (MAO) coatings on ZK60 Mg alloy. Growth characteristic, microstructure and corrosion resistance of coatings were investigated and compared with the constant voltage mode. An additional and distinguishing stage is found and regarded as a coating regrowth stage playing an important role on coating thickness. Effects of increase value of voltage were also investigated. It shows that rougher and thicker coating is formed for higher value of voltage. And it is more likely to induce destructive arc discharge for excessive increase value, thus leads to a looser and less corrosion resistant coating. The coating formed under two steps voltage-increasing mode of 280-360V exhibits the best corrosion resistance.

APA, Harvard, Vancouver, ISO, and other styles

17

Jettanasen, Chaiyan, and Chaichan Pothisarn. "The Electrical Motorcycle Charger for Application in a Residence." E3S Web of Conferences 186 (2020): 03002. http://dx.doi.org/10.1051/e3sconf/202018603002.

Full text

Abstract:

The aim of this paper is to design the charger for an electric motorcycle and analyze the behavior of voltage and current value during charging. The AC voltage supply from a residence is converted to DC voltage to charge the energy storage system by controlling the voltage and current values suitable for the charge process in all periods. The designed charger is based on the principle of a buck converter with using constant current and constant voltage technique in order to charge a 12 V, 21 Ah lead-acid battery inside the electric motorcycle. By considering the results, the first state of battery charging is a constant current mode by using the current of 5 A with the initial voltage of 55 V. In the second mode, the battery charging is done by constant voltage of 72 V and the current is reduced until the battery is full. Moreover, the charging time is about 6-8 hours.

APA, Harvard, Vancouver, ISO, and other styles

18

Chang, Changyuan, Chao Hong, Yang Xu, Hailong Sun, and Yao Chen. "Design of a High-Precision Flyback Constant Voltage AC–DC Converter." Journal of Circuits, Systems and Computers 26, no. 11 (April 12, 2017): 1750175. http://dx.doi.org/10.1142/s0218126617501754.

Full text

Abstract:

A constant voltage AC–DC converter based on the digital assistant technology is proposed in this paper, which has the advantage of high output precision. In this paper, a novel digital exponential wave generator is adopted in Constant Voltage (CV) mode to replace the normal triangle waveform to obtain a wider range of switching frequency, increasing the accuracy of output voltage under light load. The control chip is implemented based on NEC 1[Formula: see text][Formula: see text]m 5[Formula: see text]V/40[Formula: see text]V HVCMOS process, and a 5[Formula: see text]V/1.2[Formula: see text]A prototype has been built to verify the proposed control method. In PFM mode the deviation of output voltage is within [Formula: see text]% and the load regulation is [Formula: see text]%. Meanwhile, when the load jumps from light to heavy, the minimum output voltage could be maintained above 4.16[Formula: see text]V.

APA, Harvard, Vancouver, ISO, and other styles

19

Wang, Ying, Youbin Zhou, Dahu Li, Dejun Shao, Kan Cao, Kunpeng Zhou, and Defu Cai. "The Influence of VSC–HVDC Reactive Power Control Mode on AC Power System Stability." Energies 13, no. 7 (April 3, 2020): 1677. http://dx.doi.org/10.3390/en13071677.

Full text

Abstract:

Voltage source converter-based high-voltage direct current (VSC-HVDC) has the advantage of fast and independent controllability on active and reactive power. This paper focuses on effects of commonly proposed reactive power control modes, constant reactive power control and AC voltage margin control. Based on the mathematical model of single machine infinity equivalent system with embedded VSC-HVDC, the influence of VSC-HVDC with different reactive power control strategies on transient stability and dynamic stability of the AC system is studied. Then case studies were conducted with a realistic model of grid. The dynamic responses of AC/DC systems for different VSC-HVDC reactive power control modes were compared in detail. It is shown that compared to constant reactive power control, AC voltage margin control can provide voltage support to enhance the transient angle stability of an AC system. However, the fluctuant reactive power injected into a weak AC system may adversely affect power system oscillation damping for VSC-HVDC with AC voltage margin control, if the parameters of the controller have not been optimized to suppress the low-frequency oscillation. The results of this paper can provide certain reference for the decision of an appropriate VSC-HVDC reactive power control mode in practice.

APA, Harvard, Vancouver, ISO, and other styles

20

Tran, Tan-Tai, Minh-Khai Nguyen, Van-Quang-Binh Ngo, Huu-Nhan Nguyen, Truong-Duy Duong, Young-Cheol Lim, and Joon-Ho Choi. "A Three-Phase Constant Common-Mode Voltage Inverter With Triple Voltage Boost for Transformerless Photovoltaic System." IEEE Access 8 (2020): 166692–702. http://dx.doi.org/10.1109/access.2020.3023172.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Zhang, Xin, and Danny Reible. "Theoretical Analysis of Constant Voltage Mode Membrane Capacitive Deionization for Water Softening." Membranes 11, no. 4 (March 24, 2021): 231. http://dx.doi.org/10.3390/membranes11040231.

Full text

Abstract:

Water softening is desirable to reduce scaling in water infrastructure and to meet industrial water quality needs and consumer preferences. Membrane capacitive deionization (MCDI) can preferentially adsorb divalent ions including calcium and magnesium and thus may be an attractive water softening technology. In this work, a process model incorporating ion exclusion effects was applied to investigate water softening performance including ion selectivity, ion removal efficiency and energy consumption in a constant voltage (CV) mode MCDI. Trade-offs between the simulated Ca2+ selectivity and Ca2+ removal efficiency under varying applied voltage and varying initial concentration ratio of Na+ to Ca2+ were observed. A cut-off CV mode, which was operated to maximize Ca2+ removal efficiency per cycle, was found to lead to a specific energy consumption (SEC) of 0.061 kWh/mole removed Ca2+ for partially softening industrial water and 0.077 kWh/m3 removed Ca2+ for slightly softening tap water at a water recovery of 0.5. This is an order of magnitude less than reported values for other softening techniques. MCDI should be explored more fully as an energy efficient means of water softening.

APA, Harvard, Vancouver, ISO, and other styles

22

Shim, Jaesool, Migyung Cho, and Prashanta Dutta. "A method to determine quasi-steady state in constant voltage mode isotachophoresis." ELECTROPHORESIS 32, no. 9 (March 30, 2011): 988–95. http://dx.doi.org/10.1002/elps.201000594.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Mohammed, Ali Basim, and Mohd Aifaa Mohd Ariff. "The enhancement of power quality for the distribution system via dynamic voltage restorer." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (September 1, 2020): 1588. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1588-1595.

Full text

Abstract:

This paper represents a new configuration of the dynamic voltage restorer consists of approximate classical sliding mode differentiator (ACSMD) with the terminal sliding mode controller (TSMC) as the nonlinear sliding variable. In this study, the proposed structure of the DVR is utilized to maintain the magnitude of the load voltage at a constant value, maintain the system total harmonic distortion (THD), boost the robustness property and minimize the steady-state error. The power quality has received more interest due to the implementation of various industrial devices and critical loads at the distribution side. Nowadays, the main challenges in power quality in the system are voltage sags/swells, harmonics and voltage imbalance. Various devices are utilized to address these challenges. The dynamic voltage restorer is one of these devices. It is connected in series with the distribution system and injects a proper voltage magnitude to maintain the voltage load at the constant value. In this paper, the DVR model with the ASMF and TSMC is implemented in using MATLAB/Simulink. The proposed controller is evaluated using the standard voltage sag indices.

APA, Harvard, Vancouver, ISO, and other styles

24

Leu, Tzong Shyng, and Chi Hsiung Teng. "Design, Fabrication and Study of Micro-Electrospray Chips." Materials Science Forum 505-507 (January 2006): 1249–54. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.1249.

Full text

Abstract:

This paper described design, fabrication and study of micro electrospray chips. The micro electrospray chips are fabricated by using micro-electro-mechanical system (MEMS) technology. The micro electrospray techniques can be used in many applications, including high viscous fluid dispenses for 3D rapid prototyping and biological sample analysis in mass spectrometer. In this study, micro electrospray chips with different wedge angels are investigated by using microscopic visualization techniques. Four spray modes are identified at various operation voltages and currents. It is found that the voltage for stable cone-jet mode decrease as wedge angle becomes smaller. On the other hand, it is also found that stable cone-jet mode represent a constant current range in current (I)-voltage(Ф) curve. It allows us to easily identify if the micro electrospray chips operate at cone-jet mode.

APA, Harvard, Vancouver, ISO, and other styles

25

Ziadi, Youssef, and Hassan Qjidaa. "A High Efficiency Li-Ion Battery LDO-Based Charger for Portable Application." Active and Passive Electronic Components 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/591986.

Full text

Abstract:

This paper presents a high efficiency Li-ion battery LDO-based charger IC which adopted a three-mode control: trickle constant current, fast constant current, and constant voltage modes. The criteria of the proposed Li-ion battery charger, including high accuracy, high efficiency, and low size area, are of high importance. The simulation results provide the trickle current of 116 mA, maximum charging current of 448 mA, and charging voltage of 4.21 V at the power supply of 4.8–5 V, using 0.18 μm CMOS technology.

APA, Harvard, Vancouver, ISO, and other styles

26

Li, Hao, Shuo Chen, Xiang Wu, and Guojun Tan. "Model Predictive Control Method with Constant Switching Frequency to Reduce Common-Mode Voltage for PMSM Drives." Journal of Electrical and Computer Engineering 2018 (October 8, 2018): 1–12. http://dx.doi.org/10.1155/2018/1090452.

Full text

Abstract:

A model predictive control method to reduce the common-mode voltage (MPC-RCMV) with constant switching frequency for PMSM drives is proposed in this paper. Four nonzero VVs are adopted in future control period and the switching sequence is designed to ensure the switching frequency is fixed and equal to the control frequency. By substituting the finite-control nonzero voltage vectors in the current predictive model, a current predictive error space vector diagram is obtained to determine the adopted four VVs. The duty ratio calculating method for the selected four VVs is studied. Compared with the conventional MPC-RCMV method, the current and torque ripples are greatly reduced and the switching frequency is fixed. The simulation and experiment results validate the effectiveness of the proposed method.

APA, Harvard, Vancouver, ISO, and other styles

27

Faanzir, Faanzir. "Determining the shortest charging time of batteries using SOC set point at constant current – constant voltage mode." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 4 (March 29, 2021): 56–61. http://dx.doi.org/10.15199/48.2021.04.09.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Nugroho, Asep, Estiko Rijanto, and Latif Rozaqi. "Buck Converter Control for Lead Acid Battery Charger using Peak Current Mode." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 2 (June 1, 2017): 686. http://dx.doi.org/10.11591/ijpeds.v8.i2.pp686-694.

Full text

Abstract:

DC-DC buck converters are used for battery chargers in many applications including renewable energy sources, inverters, electric vehicles and robots. In this paper a buck converter was built and its controller was developed using peak current control mode for current loop and phase lag for voltage loop. This paper proposes a formulation of plant disturbance due to load variation to obtain a nominal model based on small signal approach. The controller was derived analytically based on the nominal model. Experiment results show that the buck control system functions well in regulating the output voltage. During the start up without any load it can reduce input voltage from 300 V to output voltage of 133.9 V in 19.3 ms. The developed controller can maintain the output voltage under load variation from no load to sudden load of 0.26 A. When it was implemented to charge a lead acid battery string, constant current of 3.36 A was charged in the first 173 minutes followed by constant voltage of 134.7 V until the end of charging at time 483 minutes. Thus, the developed control system of lead acid battery charger works well.

APA, Harvard, Vancouver, ISO, and other styles

29

Wang, Zhi Jie, San Ming Liu, Xia Sun, Xin Xia Su, Li Juan Chen, and Ze Yang Pei. "Dynamic Mathematical Model of Variable Pitch Double-Fed Wind Power Generator." Applied Mechanics and Materials 556-562 (May 2014): 2017–20. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2017.

Full text

Abstract:

Based on the variable speed constant frequency doubly-fed wind turbine model, this paper increased the power factor control link for the wind farm to apply two kinds of constant voltage and constant power factor control mode of the simulation needs, and build a suitable for our country to contain a mathematical model of wind power system stability analysis.

APA, Harvard, Vancouver, ISO, and other styles

30

Wang, Shuang Hu, Yong Yi Wu, Hui Jun Zhao, and Yu Feng Yang. "The Study on Coordinated Control Strategy for Micro-Grid Containing Various Distributed Generators." Advanced Materials Research 773 (September 2013): 199–202. http://dx.doi.org/10.4028/www.scientific.net/amr.773.199.

Full text

Abstract:

According to external dual power line supply and the grid-connected and islanded operating modes of micro-grid and the changeover among them, a control strategy of micro-grid with different kinds of DG (Distributed Generation) is proposed. It monitors the operating states of both micro-grid and power network and provides the unified coordinating control by the controller of micro-grid. In grid-connected mode, all kinds of DG work in constant power mode (P-Q mode) to generate power output for load. In islanded mode, energy storage system works in constant voltage-frequency mode (V-f mode), which is selected as the master power for supporting the voltage and frequency in micro-grid. And the rest works in P-Q mode. The application at one smart community in Shanghai proved its feasibility. The proposed strategy keeps the stable operation of micro-grid and implements the seamless transition between two operating modes by synchronizing device in grid-connected point.

APA, Harvard, Vancouver, ISO, and other styles

31

Reddy, Lambu Rushi. "A Transformer less Buck Boost Converter with Positive Output Voltage." International Journal for Research in Applied Science and Engineering Technology 9, no. VII (July 31, 2021): 3575–80. http://dx.doi.org/10.22214/ijraset.2021.37141.

Full text

Abstract:

Some industrial applications require high step-up and step-down voltage gain. The transformer less buck-boost converter has high voltage gain than that of traditional buck-boost converter without extreme duty cycles. A transformer less buck-boost converter with simple structure is obtained by inserting an additional switched network into the traditional buck-boost converter. The two power switches of the buck-boost converter operate synchronously. The operating principles of the buck-boost converter operating in continuous conduction modes are presented. A new buck- boost converter is presented by providing a feedback to the converter. By this, constant output voltage can be maintained under varying load conditions in both buck and boost operation. The output voltage of 40V (step—up mode)/8V (step down mode) is obtained with input voltage 18V and the outcomes are approved through recreation using PSIM MODEL.

APA, Harvard, Vancouver, ISO, and other styles

32

Legendre, Pascal. "Voltage Dependence of the Glycine Receptor–Channel Kinetics in the Zebrafish Hindbrain." Journal of Neurophysiology 82, no. 5 (November 1, 1999): 2120–29. http://dx.doi.org/10.1152/jn.1999.82.5.2120.

Full text

Abstract:

Electrophysiological recordings of outside-out patches to fast-flow applications of glycine were made on patches derived from the Mauthner cells of the 50-h-old zebrafish larva. As for glycinergic miniature inhibitory postsynaptic currents (mIPSCs), depolarizing the patch produced a broadening of the transient outside-out current evoked by short applications (1 ms) of a saturating concentration of glycine (3 mM). When the outside-out patch was depolarized from −50 to +20 mV, the peak current varied linearly with voltage. A 1-ms application of 3 mM glycine evoked currents that activated rapidly and deactivated biexponentially with time constants of ≈5 and ≈30 ms (holding potential of −50 mV). These two decay time constants were increased by depolarization. The fast deactivation time constant increased e-fold per 95 mV. The relative amplitude of the two decay components did not significantly vary with voltage. The fast component represented 64.2 ± 2.8% of the total current at −50 mV and 54.1 ± 10% at +20 mV. The 20–80% rise time of these responses did not show any voltage dependence, suggesting that the opening rate constant is insensitive to voltage. The 20–80% rise time was 0.2 ms at −70 mV and 0.22 ms at +20 mV. Responses evoked by 100–200 ms application of a low concentration of glycine (0.1 mM) had a biphasic rising phase reflecting the complex gating behavior of the glycine receptor. The time constant of these two components and their relative amplitude did not change with voltage, suggesting that modal shifts in the glycine-activated channel gating mode are not sensitive to the membrane potential. Using a Markov model to simulate glycine receptor gating behavior, we were able to mimic the voltage-dependent change in the deactivation time course of the responses evoked by 1-ms application of 3 mM glycine. This kinetics model incorporates voltage-dependent closing rate constants. It provides a good description of the time course of the onset of responses evoked by the application of a low concentration of glycine at all membrane potentials tested.

APA, Harvard, Vancouver, ISO, and other styles

33

Zhang, Dan, and Jie Wang. "Adaptive Sliding-Mode Control in Bus Voltage for an Islanded DC Microgrid." Mathematical Problems in Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/8962086.

Full text

Abstract:

The control of bus voltage is a crucial task for the stable operation of islanded DC microgrids. To improve the DC bus voltage control dynamics and stability, this paper proposes an adaptive sliding-mode control method based on large-signal model. The sliding-mode control, adaptive observation, and fix-frequency pulse width modulation technology are adopted and combined efficiently, which guarantee stable bus voltage and the constant switching frequency of closed-loop system, regardless of how the parameters vary with the variable constant-power loads and uncertainties. In addition, the reference values can be quickly tracked by the state variables using the proposed method without any additional sensors/hardware circuits. Therefore, this method is beneficial for the scalability and plug-play of the distributed generators and loads within the DC microgrids. The performance of the proposed control method has been successfully verified in simulation.

APA, Harvard, Vancouver, ISO, and other styles

34

Yang, Junfeng, Xiaodong Zhang, Xu Yang, Qiujiang Liu, and Yi Sun. "A Hybrid Compensation Topology for Battery Charging System Based on IPT Technology." Energies 12, no. 20 (October 9, 2019): 3818. http://dx.doi.org/10.3390/en12203818.

Full text

Abstract:

Based on the double-sided LCC (DLCC) compensation topology circuit, a battery charging method is proposed to meet various charging requirements. Firstly, mathematical model was obtained by modeling primary and secondary sides of DLCC. The current gain and voltage gain of the inductive power transfer (IPT) system are derived. Then, taking into account the smooth conversion of charging mode, the parameter configuration conditions for constant current (CC) output and constant voltage (CV) output are designed systematically. Finally, after choosing parameters, the CC and CV modes can be achieved by adding one switch and an auxiliary capacitor. With few additional components and non-sophisticated control, both cost and complexity can be significantly reduced. An experimental prototype with 64 V charging voltage and 1A charging current is built. The experimental results show that the charging voltage and current fluctuation of the system are small and the method can meet the above requirements.

APA, Harvard, Vancouver, ISO, and other styles

35

Jing, Elin, Zheng Feng Sun, and Hong Yuan Wen. "The Design of a New-Type LED Switching Power Supply Circuit." Advanced Materials Research 986-987 (July 2014): 1877–80. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.1877.

Full text

Abstract:

A new-type LED switching power supply circuit using flyback converter is designed based on current-mode PFC controller chip L6562. The circuit has some characteristics such as simple structure, wide input voltage range, output stability and reliable operation. The experimental results show that the system efficiency is up to 89.46% when the input voltage changes from 85V to 265V(AC), meanwhile the system works stably with constant current and constant voltage output.

APA, Harvard, Vancouver, ISO, and other styles

36

Yusof, Yushaizad, Mohd Faiz Md Adnan, Ralf Guenther, Mohd Hairi Mohd Zaman, Ahmad Asrul Ibrahim, and Afida Ayob. "Li-Ion Battery Pack Charging Process and Monitoring in Electric Vehicle." Applied Mechanics and Materials 663 (October 2014): 504–9. http://dx.doi.org/10.4028/www.scientific.net/amm.663.504.

Full text

Abstract:

This paper presents the charging process procedure of Li-ion Battery pack for electric vehicle, which is implemented based on constant current and constant voltage (CC-CV) mode. All the informations regarding battery voltage level, state of charge (SOC) during charging and discharging processes, and battery temperature, is displayed on computer via battery management system (BMS). During the charging process, the BMS monitors the voltage balancing in Li-ion battery pack, as well as the cells voltage in each modules. The voltage difference between the highest voltage cell and the lowest voltage cell is very small, which validates the voltage stability and balance in battery pack during the charging and discharging processes.

APA, Harvard, Vancouver, ISO, and other styles

37

Shi, Ling-Feng, Zhen-Bo Shi, Sen Chen, and Jian-Hui Xun. "Output Voltage Sampling Circuit for Discontinuous Conduction Mode Flyback Pulse-Width Modulation Controller." Journal of Circuits, Systems and Computers 25, no. 11 (August 14, 2016): 1650140. http://dx.doi.org/10.1142/s0218126616501401.

Full text

Abstract:

Primary-side controlled pulse-width modulation (PWM) flyback converter has been widely used in low-power and low-voltage products for its simple structure and low cost. This paper presents a novel output voltage sampling circuit which considers the influence of the rectifier diode current on the output voltage sampling. The output voltage sampling circuit samples the output voltage at 85% of the secondary inductance discharge time [Formula: see text] of last cycle, which improves the accuracy of the output voltage sampling circuit. Besides, the circuit can also sample the secondary inductance discharge time [Formula: see text]. Finally, a chip has been fabricated in 0.6[Formula: see text][Formula: see text]m complementary metal-oxide semiconductor (CMOS) process, which is used in the presented output voltage sampling circuit in its internal circuit to simple output voltage and achieve constant output voltage.

APA, Harvard, Vancouver, ISO, and other styles

38

Jiali, Yu, and Xia Chaoying. "Hybrid modular multilevel converter with cascaded full bridges for medium-voltage motor drives." Transactions of the Institute of Measurement and Control 41, no. 12 (March 18, 2019): 3279–91. http://dx.doi.org/10.1177/0142331218817087.

Full text

Abstract:

Modular multilevel converter (MMC) is especially appropriate in high-voltage constant-frequency systems due to its modularity and scalability. But, so far MMC has not been widely used in motor drives applications. Since the capacitor voltage fluctuation is proportional to the output current amplitude and inversely proportional to the output frequency under constant torque load, at the low-speed, the excessive sub-module (SM) capacitor voltage fluctuation is one of the major obstacles for MMC applied in motor drives. To suppress the SM capacitor voltage fluctuation, an effective solution is to inject a high frequency zero sequence voltage to the three-phase output voltages of MMC and control the circulating current per phase reasonably. However, the introduced high frequency and high amplitude common voltage at the motor side is harmful. In this paper, a hybrid MMC with cascaded full-bridge SMs (HMMC-CFB) topology is used in the medium-voltage motor drives. The high frequency and high amplitude common mode voltage is absorbed by the cascaded full-bridge SMs. Besides, the capacitor voltage fluctuations of each arm and the cascaded full-bridge SMs is easily limited within a reasonable range. Finally, the state space model of HMMC-CFB system is established and a stable state-error feedback control law is given. By the passive theory, the necessary and sufficient condition for the globally uniformly asymptotical stability of the HMMC-CFB closed-loop system is deduced. Simulation results confirm the superiority of this novel topology and the validity of the proposed control strategy.

APA, Harvard, Vancouver, ISO, and other styles

39

Ahmad, Mohd Fairus, Sohiful Anuar Zainol Murad, Mukhzeer Mohamad Shahimin, Shamsul Amir Abdul Rais, and Ahmad Fariz Hasan. "Modified CMFB Circuit with Enhanced Accuracy for Data Converter Application." Applied Mechanics and Materials 446-447 (November 2013): 992–96. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.992.

Full text

Abstract:

Enhanced feedback voltage of common mode feedback (CMFB) circuit is designed in this work for CMOS data sampling application using 0.18-μm Silterra process technology. The double error detecting point circuit is employed to associate with the feedback point in order to prevent the undesired voltage common mode at the output of operational transconductance amplifier (OTA). The PMOS input transistor for injecting the common mode voltage is used to fit in the limitation of voltage division in low power design. The feedback voltage is strongly pushed to have a stable value as to make the outputs of differential amplifier circuit swing at a nearly constant voltage at 1.2 V for enhancing accuracy of data converter.

APA, Harvard, Vancouver, ISO, and other styles

40

CHEN, MINGYANG, MENGLIAN ZHAO, QING LIU, LU WANG, and XIAOBO WU. "ULTRA-LOW POWER BOOST CONVERTER WITH CONSTANT ON-TIME-BASED MPPT FOR ENERGY HARVESTING APPLICATIONS." Journal of Circuits, Systems and Computers 23, no. 02 (February 2014): 1450027. http://dx.doi.org/10.1142/s0218126614500273.

Full text

Abstract:

An ultra-low power boost converter for energy harvesting applications is introduced in this brief. The idle power dissipation is reduced to 800 nW by using a novel output voltage detector (OVD) which is insensitive to temperature variation and process deviation. Furthermore, a constant on-time (COT)-based hysteretic burst mode controller with maximum power point tracking (MPPT) technique is developed to ensure high power efficiency for a wide input voltage range. After startup, the input voltage can be set as low as 30 mV. The whole system is designed and fabricated in SMIC 0.18 μm CMOS process, the end-to-end power efficiency of this converter can reach 49% at 350 mV input voltage and 65% at 750 mV input voltage.

APA, Harvard, Vancouver, ISO, and other styles

41

Risdiyanto, Agus, Bambang Susanto, Noviadi Arief Rachman, Anwar Muqorobin, Tinton Dwi Atmaja, and Harjono P. Santosa. "Design of constant output voltage DC-AC inverter for batteryless solar PV system." Bulletin of Electrical Engineering and Informatics 9, no. 4 (August 1, 2020): 1326–34. http://dx.doi.org/10.11591/eei.v9i4.2350.

Full text

Abstract:

This paper introduces a DC-AC inverter design that operates stand alone to deliver power from solar photovoltaic (PV) to the load directly without going through the battery. In batteryless solar PV, the output voltage of solar PV always varies according to solar irradiation, temperature, so that it becomes a challenge in modelling DC-AC inverter with constant output voltage. The design consists of a boost converter, h-bridge switching and driver, and LC filter to generate sinusoidal ac voltage as output to load. To ensure a constant inverter output voltage, the design equipped by a close loop PI controller based on voltage control mode. The design modelled and simulated by PSIM. PV dc input was set variation according to the irradiation value (W/m2) and the output connected to a load that has rated voltage of 220 Vac and 3.4 A of nominal current. The results show that in the irradiation variation 600-1500 W/m2, the inverter was able to maintain the output voltage of 220 Vac ± 0.91%, 50 Hz which is still in the voltage range based on standard. The efficiency produced by DC-AC inverter 97.7 % at 600 W/m2 and 83.6 % at 1500 W/m2.

APA, Harvard, Vancouver, ISO, and other styles

42

Parada Salado, Juan Gerardo, Carlos Alonso Herrera Ramírez, Allan Giovanni Soriano Sánchez, and Martín Antonio Rodríguez Licea. "Nonlinear Stabilization Controller for the Boost Converter with a Constant Power Load in Both Continuous and Discontinuous Conduction Modes." Micromachines 12, no. 5 (May 6, 2021): 522. http://dx.doi.org/10.3390/mi12050522.

Full text

Abstract:

The operation of Boost converters in discontinuous conduction mode (DCM) is suitable for many applications due to the, among other advantages, inductor volume reduction, high efficiency, paralleling, and low cost. Uses in biomedicine, nano/microelectromechanical, and higher power systems, where wide ranges of input/output voltage and a constant power load (CPL) can coexist, are well-known examples. Under extremely wide operating ranges, it is not difficult to change to a continuous conduction mode (CCM) operation, and instability, chaos, or bifurcations phenomena can occur regardless of the conduction mode. Unfortunately, existing control strategies consider a single conduction mode or linearized models because only slight resistive/CPL power level or input/output voltage variations (and no conduction mode changes) were expected. In this paper, new mathematical models for the Boost converter (with resistive or CPL) that are conduction mode independent are presented and validated. Since the open-loop dynamics of the proposed CPL model is unstable, a nonlinear control law capable of stabilizing the boost converter regardless of the conduction mode is proposed. A stability analysis based on a common-Lyapunov function is provided, and numerical and experimental tests are presented to show the proposal’s effectiveness.

APA, Harvard, Vancouver, ISO, and other styles

43

Nguyen, Thai-Thanh, Hyeong-Jun Yoo, Hak-Man Kim, and Huy Nguyen-Duc. "Direct Phase Angle and Voltage Amplitude Model Predictive Control of a Power Converter for Microgrid Applications." Energies 11, no. 9 (August 27, 2018): 2254. http://dx.doi.org/10.3390/en11092254.

Full text

Abstract:

Several control strategies of the finite control set model predictive controls (FCS-MPC) have been proposed for power converters, such as predictive current control (PCC), direct predictive power control (DPPC), and predictive voltage control (PVC). However, for microgrid (MG) applications, the control strategy of the FCS-MPC for a power converter might be changed according to the operation mode of the MG system, which results in a transient response in the system voltage or current during the mode transition. This study proposes a new control strategy of FCS-MPC for use in both islanded and grid-connected operation modes of an MG system. Considering the characteristic of a synchronous generator, a direct phase angle and voltage amplitude model predictive control (PAC) of a power converter is proposed in this study for MG applications. In the islanded mode, the system frequency is directly controlled through the phase angle of the output voltage. In the grid-connected mode, a proportional-integral (PI) regulator is used to compensate for the phase angle and voltage amplitude of the power converter for constant power control. The phase angle of the system voltage can be easily adjusted for the synchronization process of an MG system. A comparison study on the proposed PAC method and existing predictive methods is carried out to show the effectiveness of the proposed method. The feasibility of the proposed PAC strategy is evaluated in a simulation-based system by using the MATLAB/Simulink environment.

APA, Harvard, Vancouver, ISO, and other styles

44

MA, YANZHAO, SHAOXI WANG, SHENGBING ZHANG, and XIAOYA FAN. "A HIGH EFFICIENCY ADAPTIVE CURRENT MODE STEP-UP/STEP-DOWN DC–DC CONVERTER WITH FOUR MODES FOR SMOOTH TRANSITION." Journal of Circuits, Systems and Computers 23, no. 07 (June 2, 2014): 1450097. http://dx.doi.org/10.1142/s0218126614500972.

Full text

Abstract:

This paper presents a current mode step-up/step-down DC–DC converter with high efficiency, small output voltage ripple, and fast transient response. The control scheme adaptively configures the converter into the proper operation mode. The efficiency is improved by reducing the switching loss, wherein the converter operates like a buck or boost converter, and conduction loss, wherein the average inductor current is reduced in transition modes. The output voltage ripple is significantly reduced by incorporating two constant time transition modes. A fast line transient response is achieved with small overshoot and undershoot voltage. An adaptive substrate selector (ASS) is introduced to dynamically switch the substrate of PMOS power transistors to the highest on-chip voltage. A lossless self-biased current sensor with high-speed and high-accuracy is also achieved. The proposed converter was designed with a standard 0.5 μm CMOS process, and can regulate an output voltage within the input voltage ranged from 2.5 V to 5.5 V. The maximum load current is 600 mA, and the maximum efficiency is 94%. The output voltage ripple is less than 15 mV in all operation modes.

APA, Harvard, Vancouver, ISO, and other styles

45

El Alaoui, Mustapha, Fouad Farah, Karim El khadiri, Ahmed Tahiri, Rachid El Alami, and Hassan Qjidaa. "A high efficiency and high speed charge of Li-Ion battery charger interface using switching-based technique in 180 nm CMOS technology." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (March 1, 2021): 374. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp374-384.

Full text

Abstract:

In this work, the design and analysis of new Li-Ion battery charger interface using the switching-based technique is proposed for high efficiency, high speed charge and low area. The high efficiency, the lower size area and the fast charge are the more important norms of the proposed Li-Ion battery charger interface. The battery charging is completed passes to each charging mode: The first mode is the trickle charge mode (TC), the second mode is the constant current mode (CC) and the last mode is the constant voltage mode (CV), in thirty three minutes. The new Li-Ion battery charger interface is designed, simulated and layouted in Cadence software using TSCM 180 nm CMOS technology. With an input voltage VIN = 4.5 V, the output battery voltage (VBAT) may range from 2.7 V to 4.2 V and the maximum charging battery current (IBAT) is 1.7 A. The peak efficiency reaches 97% and the total area is only 0.03mm2 .

APA, Harvard, Vancouver, ISO, and other styles

46

Vavilov, Vyacheslav, Flur Ismagilov, Irek Khayrullin, and Ruslan Dinarovich Karimov. "High-Voltage Generator with Constant Magnets and Toroidal Winding for Intermitted Mode of Operation." International Review of Aerospace Engineering (IREASE) 11, no. 1 (February 28, 2018): 39. http://dx.doi.org/10.15866/irease.v11i1.13595.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

YAN Minxiu, FAN Liping, and SUN Ping. "Constant Voltage Output in Proton Exchange Membrane Fuel Cell under Fuzzy Sliding Mode Control." INTERNATIONAL JOURNAL ON Advances in Information Sciences and Service Sciences 4, no. 20 (November 30, 2012): 180–87. http://dx.doi.org/10.4156/aiss.vol4.issue20.22.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Noroozi, Negar, and Mohammad Reza Zolghadri. "Three-Phase Quasi-Z-Source Inverter With Constant Common-Mode Voltage for Photovoltaic Application." IEEE Transactions on Industrial Electronics 65, no. 6 (June 2018): 4790–98. http://dx.doi.org/10.1109/tie.2017.2774722.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Bleijs, J. A. M. "Continuous conduction mode operation of three-phase diode bridge rectifier with constant load voltage." IEE Proceedings - Electric Power Applications 152, no. 2 (2005): 359. http://dx.doi.org/10.1049/ip-epa:20040684.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Fang, Kai, Jian Lin Li, and Dong Hui. "Study on the Control Strategy of PV-Energy Storage Microgrid Working in Islanded Mode." Applied Mechanics and Materials 672-674 (October 2014): 79–85. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.79.

Full text

Abstract:

This paper mainly discussed the control strategy of PV-energy storage microgrid that run in islanded mode , the PV inverter and the energy storage inverter use constant power control and constant voltage and constant frequency control respectively,with such a control strategy to ensure the microgrid in islanded mode supply the load stably. To verify the proposed theory,built the simulation model on the Simulink platform.In order to facilitate the parameters modification and improve the speed of the simulation,PQ controller was programmed by C language and embedded in the Simulink platform.Through the analysis of the simulation results,proved that the correctness and validity of the control strategy.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Constant voltage mode'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles