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Journal articles on the topic 'Quasi-Resonant Soft Switching Technique'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

HUA, GUICHAO, and FRED C. LEE. "SOFT-SWITCHING PWM CONVERTER TECHNOLOGIES." Journal of Circuits, Systems and Computers 05, no. 04 (1995): 531–58. http://dx.doi.org/10.1142/s0218126695000333.

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The switched-mode power conversion technologies have evolved from the basic PWM converters to resonant converters, quasi-resonant converters, multi-resonant converters, and most recently, to soft-switching PWM converters. In this paper, several typical resonant techniques and several soft-switching PWM techniques are reviewed, and their merits and limitations are assessed. The resonant techniques reviewed include the quasi-resonant converters, multi-resonant converters, Class-E converters, and resonant dc link converters; and the soft-switching PWM techniques reviewed include the zero-voltage-switched (ZVS) quasi-square-wave converters, ZVS-PWM converters, zero-current-switched PWM converters, zero-voltage- transition PWM converters, and zero-current-transition PWM converters.

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2

JOVANOVIĆ, MILAN M. "Invited paper. Resonant, quasi-resonant, multi-resonant and soft-switching techniques—merits and limitations." International Journal of Electronics 77, no. 5 (1994): 537–54. http://dx.doi.org/10.1080/00207219408926086.

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3

Kasiran, A. N., A. Ponniran, A. A. Bakar, M. H. Yatim, M. K. R. Noor, and J. N. Jumadril. "Implementation of Resonant and Passive Lossless Snubber Circuits for DC-DC Boost Converter." International Journal of Engineering & Technology 7, no. 4.30 (2018): 246. http://dx.doi.org/10.14419/ijet.v7i4.30.22276.

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This paper presents the comparison of resonant and passive lossless snubber circuits implementation for DC-DC boost converter to achieve soft-switching condition. By applying high switching frequency, the volume reduction of passive component can be achieved. However, the required of high switching frequency cause the switching loss during turn-ON and turn-OFF condition. In order to reduce the switching loss, soft-switching technique is required in order to reduce or eliminate the losses at switching devices. There are various of soft-switching techniques can be considered, either to reduce the switching loss during turn-ON only, or turn-OFF only, or both. This paper discusses comparative analyses of resonant and passive lossless snubber circuits which applied in the DC-DC boost converter structure. Based on the simulation results, the switching loss is approximately eliminated by applying soft-switching technique compared to the hard-switching technique implementation. The results show that the efficiency of resonant circuit and passive lossless snubber circuit are 82.99% and 99.24%, respectively. Therefore, by applying passive lossless snubber circuit in the DC-DC boost converter, the efficiency of the converter is greatly increased. Due to the existing of an additional capacitor in soft-switching circuit, it realizes lossless operation of DC-DC boost converter.

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4

Zheng, Pin Qi, and Qing Sheng Yu. "Optimal Design of Energy-Saving Induction Cooker Power Controller Based on Fuzzy Technology." Applied Mechanics and Materials 678 (October 2014): 423–28. http://dx.doi.org/10.4028/www.scientific.net/amm.678.423.

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Application of Soft-switching technique and fuzzy control is discussed to optimize traditional induction cooker controller. Soft-switching technique is used to improve output efficiency of induction cooker. Switch voltage regulation by fuzzy control are used to adjust output power of induction cooker. Soft-switching inverter consists of resonant DC link and LC resonant network. Resonant DC link is used to realize ZVS, and resonant network is used to eliminate harmonics. Fuzzy control based on look-up table is adopted to adjust duty cycle of switch mode regulated power supply, which changes the DC supply voltage, so that amplitude of AC signal inverted by induction cooker is changed to adjust output power of induction cooker according to the requirement, , ensuring the operating temperature aligned with the target temperature.

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5

Ota, Ryosuke, Dannisworo Sudarmo Nugroho, and Nobukazu Hoshi. "A Consideration on Maximum Efficiency of Resonant Circuit of Inductive Power Transfer System with Soft-Switching Operation." World Electric Vehicle Journal 10, no. 3 (2019): 54. http://dx.doi.org/10.3390/wevj10030054.

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By using bi-directional inductive power transfer (IPT) systems as battery chargers for electric vehicles (EVs), battery charging operations become convenient and safe. However, IPT systems have problems such as occurrences of much electromagnetic noise and power loss because the converters of IPT systems are driven in high frequency by tens of kHz. To solve these problems, there is a case where the soft-switching technique needs to be applied to the converters of IPT systems. However, in soft-switching operation, the power factor of the resonant circuit becomes lower, resulting in a lower resonant circuit efficiency. In previous works, when the soft-switching technique was applied to the converters, the resonant circuit had not always been able to be operated with high efficiency because the influence caused by soft-switching operation had not been considered. For this reason, there was a case where the efficiency of the overall system with soft-switching operation became lower than the efficiency in hard-switching operation. Therefore, in this paper, the influence on the efficiency of the resonant circuit caused by the soft-switching operation is clarified by the theoretical analysis and experiments; then, the guideline for improving the efficiency of IPT systems is shown. As a result, in the experiments, it could be understood that the efficiency of the overall system with soft-switching operation becomes higher than the efficiency in hard-switching operation when the operating point of the resonant circuit was close to the requirement guideline, which is shown by using the primary-side voltage and the secondary-side voltage of the resonant circuit. Therefore, it is suggested that the efficiency of IPT systems could be improved by properly regulating the primary-side direct current (DC) voltage.

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6

Y, Sukhi, and Padmanabhan S. "SOFT SWITCHING TECHNIQUE USING RESONANT CONVERTER FOR CONSTANT SPEED DRIVE." International Journal on Intelligent Electronic Systems 2, no. 1 (2008): 16–21. http://dx.doi.org/10.18000/ijies.30019.

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7

Sayed, Khairy, Mohammed G. Gronfula, and Hamdy A. Ziedan. "Novel Soft-Switching Integrated Boost DC-DC Converter for PV Power System." Energies 13, no. 3 (2020): 749. http://dx.doi.org/10.3390/en13030749.

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This paper presents a novel soft-switching boost DC-DC converter, which uses an edge-resonant switch capacitor based on the pulse width modulation PWM technique. These converters have high gain voltage due to coupled inductors, which work as a transformer, while the boost converter works as a resonant inductor. Upon turning on, the studied soft switching circuit works at zero-current soft switching (ZCS), and upon turning off, it works at zero-voltage soft switching (ZVS) while using active semiconductor switches. High efficiency and low losses are obtained while using soft switching and auxiliary edge resonance to get a high step-up voltage ratio. A prototype model is implemented in the Power Electronics Laboratory, Assiut University, Egypt. Seventy-two-panel PV modules of 250 W each were used to simulate and execute the setup to examine the proposed boost converter.

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8

Kasiran, Mohd Amirul Naim, Asmarashid Ponniran, Nurul Nabilah Mad Siam, Mohd Hafizie Yatim, Nor Azmira Che Ibrahim, and Asmawi Md Yunos. "DC-DC converter with 50 kHz-500 kHz range of switching frequency for passive component volume reduction." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 2 (2021): 1114. http://dx.doi.org/10.11591/ijece.v11i2.pp1114-1122.

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This paper presents the relationship of switching frequency towards passive components volume of DC-DC boost converter. Principally, the inductor current ripple and capacitor voltage ripple must be considered in order to design the inductor and capacitor, respectively. By increasing the switching frequency, smaller size and volume of passive component can be designed. As the consequences, the switching loss increases during switching transition at turn-ON and turn-OFF conditions. This paper used soft-switching technique to reduce the switching loss at turn-ON condition. The soft-switching technique is realized by adding resonant circuit in DC-DC boost converter. The effectiveness of resonant circuit will be analysed, thus, the efficiency of the converter can be improved. The range of switching frequency considered in the experimental are 50 kHz to 500 kHz. A 100 W prototype has been developed and tested in order to verify the principle. The switching loss experimentally confirm reduced by implementing soft-switching technique with efficiency converter improved from 96.36% to 97.12% when 500 kHz of switching frequency is considered. The passive components volume reduction is achieved when high switching frequency is used where the total volume of passive component when 50 kHz and 500 kHz are 0.083 dm3 and 0.010 dm3, respectively.

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9

Wai, R. J., R. Y. Duan, J. D. Lee, and L. W. Liu. "High-Efficiency Fuel-Cell Power Inverter With Soft-Switching Resonant Technique." IEEE Transactions on Energy Conversion 20, no. 2 (2005): 485–92. http://dx.doi.org/10.1109/tec.2004.832092.

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10

Baharom, Rahimi. "Soft Switching of Three-Phase AC to DC CIHRC with Wireless Power Transfer (WPT) Function." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 3 (2018): 965. http://dx.doi.org/10.11591/ijpeds.v9.i3.pp965-971.

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<span lang="EN-US">This paper presents the verification of soft switching condition for three-phase AC to DC current injection hybrid resonant converter (CIHRC) with wireless power transfer (WPT) function. Details on the operation of current injection technique with the lossless zero voltage switching (ZVS) condition on shaping the high power factor of supply current waveforms are presented. With a suitable high switching frequency operation, the proposed resonant converter is capable to operate with ZVS conditions, thus, allowing reduction in the size of inductive and magnetic components. Selected results are also presented to verify the lossless ZVS condition for three-phase AC-DC CIHRC with WPT function.</span>

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11

Deepa, K., Hridya Merin Saju, and M. Vijaya Kumar. "Soft Switched Multi-Output Flyback Converter with Voltage Doubler." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 2 (2015): 396. http://dx.doi.org/10.11591/ijpeds.v6.i2.pp396-403.

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A novel multi-output voltage doubler circuit with resonant switching technique is proposed in this paper. The resonant topology in the primary side of the flyback transformer switches the device either at zero voltage or current thus optimizing the switching devices by mitigating the losses. The voltage doubler circuit introduced in the load side increases the voltage by twice the value thereby increasing the load power and density. The proposed Multi-output Isolated Converter removes the need for mutiple SMPS units for a particular application. This reduces the size and weight of the converters considerably leading to a greater payload. This paper aims at optimizing the proposed converter with some design changes. The results obtained from the hardware prototype are given in a comprehensive manner for a 3.5W converter operating at output voltages of 5V and 3.3V at 50 kHz switching frequency. The converter output is regulated with the PI controller designed with SG3523 IC. The effects of load and line regulation for ±20% variations are analyzed in detail.

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12

Colak, Ilhami, Mehmet Demirtas, and Ersan Kabalci. "Design, optimisation and application of a resonant DC link inverter for solar energy systems." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 33, no. 5 (2014): 1761–76. http://dx.doi.org/10.1108/compel-06-2013-0200.

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Purpose – The purpose of this paper is to examine diminish switching losses in a solar energy conversion system in order to utilise the full efficiency of a solar panel. Design/methodology/approach – In this paper, a boost converter and a resonant DC link (RDCL) inverter are controlled by a microcontroller. The maximum power point tracker (MPPT) algorithm implemented for boost converter supplies to track maximum power point of solar panel. The Class D full-bridge resonant inverter (RI) that is considered to be supplied by boost converter is modeled and zero voltage switching operation is performed by controlling the inverter with sinusoidal pulse width modulation (SPWM) control scheme. The control algorithm is managed with a feedback detecting the current of the boost converter and the zero voltage levels of capacitor voltage in the resonant circuit. Findings – There are several control techniques have been proposed to reduce switching losses and harmonic contents in conventional or RDCL inverters. Solar panels are used in low power applications among other renewable energy sources. By considering that the efficiency parameter of an actual solar panels is around 14∼17 per cent, the switching losses occurred in energy conversion systems causes the efficiency are reduced. Originality/value – The proposed approach has been decreased the switching power losses owing to resonant DC link inverter while the developed MPPT algorithm provides to generate maximum power. This paper introduces a novel soft switching technique in solar energy applications in order to maximise the possible efficiency.

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13

Altanneh, Nabeel Sabri, Akin Uslu, and Mehmet Timur Aydemir. "Design of A Series Resonant Converter GMAW Welding Machine by Using the Harmonic Current Technique for Power Transfer." Electronics 8, no. 2 (2019): 205. http://dx.doi.org/10.3390/electronics8020205.

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This paper proposes the use of a control algorithm that can yield soft switching both at turn-on and turn-off of the inverter of series resonance converter (SRC) gas metal arc welding (GMAW) machines. The technique takes advantage of the band-pass filter characteristics of the SRC and controls the power by using switching frequencies that are subharmonics of the resonance frequency. The design and the experimental results for a 5 kW prototype system are given to prove that the algorithm can be used in GMAW systems.

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14

Chen, Yiming, Jianping Xu, Yao Wang, Leiming Lin, and Jing Cao. "A Dual-Carrier Modulation Technique for Half-Bridge Resonant Converter With Wide Soft-Switching Range." IEEE Transactions on Industrial Electronics 66, no. 1 (2019): 223–32. http://dx.doi.org/10.1109/tie.2018.2826464.

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15

NGO, THUONG PHI, and Nam Quang Nguyen. "LLC Inverter Design Procedure for Induction Heating with Quantitative Analysis of Power Transfer." Science & Technology Development Journal - Engineering and Technology 4, no. 1 (2021): first. http://dx.doi.org/10.32508/stdjet.v4i1.751.

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The paper explains the operating principle of an LLC resonant circuit for induction heating applications. Although induction heating has attracted a great deal of attention in recent years, very little consideration on designing the inductor in the resonant circuit for specific requirements has been done. Specifically, a design procedure with the required power and work-head dimension as inputs is still needed, from a practical point of view. In this paper, a quantitative analysis of power transferred to the work-head will be done to help design the resonant circuit. A design procedure for the LLC circuit will be proposed, utilizing results from the quantitative power analysis and taking into account mechanical constraints on the work-head. In addition, a simple technique to monitor the soft switching condition of the power switches in the resonant inverter, utilizing only voltage signals, is also proposed. The feasibility of the proposed design procedure will be demonstrated and verified by simulations and experiments.

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16

Herasymenko, Pavlo, and Volodymyr Pavlovskyi. "Soft start-up strategy of pulse-density-modulated series-resonant converter for induction heating application." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (2021): 258. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp258-272.

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This paper presents a soft start-up strategy of pulse-density-modulated series-resonant converter for induction heating application. The pulse-density modulation (PDM) technique is widely used in converters based on voltage-source series-resonant inverters (SRIs) to control the output current or power. However, during a start-up process, PDM has some disadvantages both in inrush current limiting and providing a zero-voltage switching operation of SRI transistors. In the paper, different PDM techniques are considered and basic moments of PDM using within the start-up process are analyzed. A new soft start-up strategy of PDM converter for induction heating application is proposed. The main features of the proposed strategy include an interleaved or a stepped PDM control, an initial combination of PDM at the beginning of the start-up process, and an operating algorithm during the start-up process. The proposed strategy was verified by a 2.5 kW experimental setup of the pulse-density-modulated interleaved converter with an operating frequency from 50 kHz up to 100 kHz. Experimental results confirm the effectiveness of the proposed start-up strategy and show that the maximum current amplitude within start-up processes exceeds the maximum steady-state current amplitude by no more than 30%.

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17

Wu, Xuanlyu, Dejie Luo, Panpan Wu, Xin Zhao, Zhen Kang, and Xiaohua Wu. "Zero-Vector-Injection Based Current Sharing Control of Interleaved Full-Bridge LLC Resonant Converters." Energies 13, no. 2 (2020): 347. http://dx.doi.org/10.3390/en13020347.

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Interleaved LLC resonant converters are widely used in various fields. However, interleaved LLC converters under Pulse Frequency Modulation (PFM) will lose the regulation of individual phases, causing a load sharing problem. Existing load sharing solutions have limitations; for example, phase shedding and current sharing cannot be realized at the same time. This paper proposed a novel current sharing method for interleaved full-bridge LLC resonant converters. Based on Zero-Vector-Injection, the voltage applied to the resonant tank is controlled to compensate for the difference in gain caused by component tolerance. The modulation strategy is proposed to maintain soft switching after Zero-Vector-Injection, and the phase shedding technique is also used to improve the efficiency at a light load. The detailed theoretical analysis and implementation method are proposed and validated using simulations. Experiments are also carried out to verify the feasibility of the proposed strategy based on a 2-phase 1.8 kW prototype.

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18

Lin, Bor-Ren, and Yen-Chieh Huang. "Bidirectional DC Converter with Frequency Control: Analysis and Implementation." Energies 11, no. 9 (2018): 2450. http://dx.doi.org/10.3390/en11092450.

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In this paper, a direct current (dc) converter with the abilities of bidirectional power transfer and soft switching characteristics is studied and implemented. The circuit schematic of the developed dc converter is built by a half-bridge converter and a center-tapped rectifier with synchronous rectifier. Under forward power transfer, a half-bridge circuit is controlled to regulate the low-voltage side at a stable value. For backward power transfer, a center-tapped rectifier with synchronous rectifier is regulated to control the high-voltage side at the desired voltage value, and the half-bridge circuit is operated as a voltage doubler rectifier. Active power devices are operated at zero-voltage switching using a series resonant technique on the high-voltage side with frequency modulation and inductive load operation. The practicability of the developed converter is established from experiments with a laboratory prototype circuit.

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19

Yau, Yeu-Torng, Kuo-Ing Hwu, and Yu-Kun Tai. "Active Clamp Boost Converter with Blanking Time Tuning Considered." Applied Sciences 11, no. 2 (2021): 860. http://dx.doi.org/10.3390/app11020860.

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An active clamp boost converter with blanking time auto-tuned is presented herein, and this is implemented by an additional auxiliary switch, an additional resonant inductor, and an additional active clamp capacitor as compared with the conventional boost converter. In this structure, both the main and auxiliary switches have zero voltage switching (ZVS) turn-on as well as the output diode has zero current switching (ZCS) turn-off, causing the overall efficiency of the converter to be upgraded. Moreover, as the active clamp circuit is adopted, the voltage spike on the main switch can be suppressed to some extent whereas, because of this structure, although the input inductor is designed in the continuous conduction mode (CCM), the output diode can operate with ZCS turn-off, leading to the resonant inductor operating in the discontinuous conduction mode (DCM), hence there is no reverse recovery current during the turn-off period of the output diode. Furthermore, unlike the existing soft switching circuits, the auto-tuning technique based on a given look-up table is added to adjust the cut-off time point of the auxiliary switch to reduce the current flowing through the output diode, so that the overall efficiency is upgraded further. In this paper, basic operating principles, mathematic deductions, potential designs, and some experimental results are given. To sum up, the novelty of this paper is ZCS turn-off of the output diode, DCM operation of the resonant inductor, and auto-tuning of cut-off time point of the auxiliary switch. In addition, the efficiency of the proposed converter can be up to 96.9%.

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20

Zhu, Tianyu, Jianze Wang, Yanchao Ji, and Yiqi Liu. "A Novel High Efficiency Quasi-Resonant Converter." Energies 11, no. 8 (2018): 1961. http://dx.doi.org/10.3390/en11081961.

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In this paper, a new constant-frequency quasi-resonant converter is proposed. Compared with the traditional LLC converter, the proposed converter can effectively reduce the range of the operating frequency. The output voltage is changed to adjust the reactance of the resonant cavity. The proposed converter has a better loss factor. To verify the theoretical analysis and soft-switching condition, a 250 W, 100 V output prototype was built and compared with the full-bridge LLC converter. Analysis and experimental results verify that a smaller operating frequency range and volume of the transformers, a soft-switching condition, and a higher overall efficiency are achieved with the proposed converter.

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21

Kifune, H., Y. Hatanaka, and M. Nakaoka. "Quasi-series-resonant-type soft-switching phase shift modulated inverter." IEE Proceedings - Electric Power Applications 150, no. 6 (2003): 725. http://dx.doi.org/10.1049/ip-epa:20030558.

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22

Mohammed Dobi, Abdul-Hakeem, Mohd Rodhi Sahid, and Tole Sutikno. "Overview of Soft-Switching DC-DC Converters." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 4 (2018): 2006. http://dx.doi.org/10.11591/ijpeds.v9.i4.pp2006-2018.

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Application of soft switching in DC-DC converter has achieved a remarkable success in power electronics technology in terms of reduction in switching losses, improve in power density, minimization of electromagnetic interference (EMI) and reduction in the volume of DC-DC converters. Quite a number of soft switching techniques had been reported in the past four decades. This paper aims at providing a review of various soft switching techniques, based on topology, the location of the resonant network, performance characteristics, and principles of operation. In addition, converters area of application, advantages as well as limitations are also highlighted.

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23

F. Omar, M., and H. C. M. Haris. "Series-Loaded Resonant Converter DC-DC Buck Operating for Low Power." Indonesian Journal of Electrical Engineering and Computer Science 8, no. 1 (2017): 159. http://dx.doi.org/10.11591/ijeecs.v8.i1.pp159-168.

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This paper presents the functions of Series-Loaded Resonant Converter (SLRC). Series Loaded Resonant DC-DC converter is a type of soft-switching topology widely known for providing improved efficiency. Zero voltage switching (ZVS) buck converter is more preferable over hard switched buck converter for low power, high frequency DC-DC conversion applications. Zero Voltage switching techniques will be used to improve the efficiency of current and voltage at the series loaded half-bridge rectifier. The results will be described from PSIM simulation, Programming of MATLAB calculation and hardware testing.

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24

Chen, Gengxin, Nuoman Xu, Li Yuan, Muhammad Humayun, and Muhammad Mansoor Khan. "A DC-DC Center-Tapped Resonant Dual-Active Bridge with Two Modulation Techniques." Electronics 9, no. 10 (2020): 1699. http://dx.doi.org/10.3390/electronics9101699.

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Power converters with higher efficiency in a wide load range are important for reducing the overall energy consumption of renewable energy generation systems. A center-tapped LC series resonant dual-active bridge (LC-DAB) converter for DC-DC conversion is proposed in this paper. The proposed converter utilizes a center-tapped bridge to block reverse current and eliminate back flow power to reduce conduction losses. Two modulation methods for the proposed topology (i.e., fixed frequency modulation (FFM), and variable frequency modulation (VFM)) are proposed and analyzed. Both modulation methods can realize soft switch over the entire load range to reduce switching losses. In addition, the proposed modulation techniques guarantee soft switching for all devices and synchronous rectifier is realized by the center-tapped bridge to further reduce the conduction losses. Furthermore, a comprehensive comparison in terms of conduction losses and switching losses has been carried out to highlight the superiority of the proposed converter over the existing LC resonant converters. Finally, simulated and experimental results for a 1.5 kW prototype are presented to validate the theoretical analysis and performance of the proposed converter.

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25

Urgun, S., T. Erfidan, H. Bodur, and B. Cakir. "A new ZVT–ZCT quasi-resonant DC link for soft switching inverters." International Journal of Electronics 97, no. 1 (2010): 83–97. http://dx.doi.org/10.1080/00207210903168322.

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26

Yie-Tone Chen. "A new quasi-parallel resonant DC link for soft-switching PWM inverters." IEEE Transactions on Power Electronics 13, no. 3 (1998): 427–35. http://dx.doi.org/10.1109/63.668102.

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27

Behera, S., S. P. Das, and S. R. Doradla. "Quasi-resonant soft-switching inverter for low and high power factor loads." IEE Proceedings - Electric Power Applications 151, no. 4 (2004): 451. http://dx.doi.org/10.1049/ip-epa:20040355.

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Wai, R. J., C. Y. Lin, L. W. Liu, and R. Y. Duan. "Voltage-clamped forward quasi-resonant converter with soft switching and reduced switch stress." IEE Proceedings - Electric Power Applications 152, no. 3 (2005): 558. http://dx.doi.org/10.1049/ip-epa:20045025.

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29

Malesani, L., P. Tomasin, and V. Toigo. "Space vector control and current harmonics in quasi-resonant soft-switching PWM conversion." IEEE Transactions on Industry Applications 32, no. 2 (1996): 269–78. http://dx.doi.org/10.1109/28.491474.

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30

Rogina, Maria, Alberto Rodriguez, Diego G. Lamar, Jaume Roig, German Gomez, and Piet Vanmeerbeek. "Analysis of Intrinsic Switching Losses in Superjunction MOSFETs Under Zero Voltage Switching." Energies 13, no. 5 (2020): 1124. http://dx.doi.org/10.3390/en13051124.

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Switching losses of power transistors usually are the most relevant energy losses in high-frequency power converters. Soft-switching techniques allow a reduction of these losses, but even under soft-switching conditions, these losses can be significant, especially at light load and very high switching frequency. In this paper, hysteresis and energy losses are shown during the charge and discharge of the output capacitance (COSS) of commercial high voltage Superjunction MOSFETs. Moreover, a simple methodology to include information about these two phenomena in datasheets using a commercial system is suggested to manufacturers. Simulation models including COSS hysteresis and a figure of merit considering these intrinsic energy losses are also proposed. Simulation and experimental measurements using an LLC resonant converter have been performed to validate the proposed mechanism and the usefulness of the proposed simulation models.

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31

Jafar, J. J., and B. G. Fernandes. "A new quasi-resonant DC-link PWM inverter using single switch for soft switching." IEEE Transactions on Power Electronics 17, no. 6 (2002): 1010–16. http://dx.doi.org/10.1109/tpel.2002.805598.

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32

Jung, Y. c., H. L. Liu, G. C. Cho, and G. H. Cho. "Soft switching space vector PWM inverter using a new quasi-parallel resonant DC link." IEEE Transactions on Power Electronics 11, no. 3 (1996): 503–11. http://dx.doi.org/10.1109/63.491645.

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33

Chakraborty, Avijit, Pradip Kumar Sadhu, Kallol Bhaumik, Palash Pal, and Nitai Pal. "Performance Analysis of High frequency Parallel Quasi Resonant Inverter Based Induction Heating System." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 2 (2016): 447. http://dx.doi.org/10.11591/ijece.v6i2.8034.

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This paper presents the performance analysis of high frequency parallel quasi-resonant converter for domestic induction heating application as well as industrial application. The power semiconductor switch like IGBT is incorporated in this high frequency converter. Parallel Quasi-resonant topology is selected to provide ZVS and ZCS operation during switching conditions to reduce switching losses. Here, IGBT provides better efficiency and faster switching technique. In the proposed topology, a diode is connected across the IGBT ensuring the ZVS operation during turn-ON that enhances the possibility of less turn-ON loss. On the other hand, the switching frequency nearly equal to the resonant frequency ensures the ZCS operation of the IGBT during turn-OFF, which also ensures a reduction of turn-OFF loss. As a result, the performance of the induction heating system gets improved. The proposed scheme is analyzed using PSIM software environment.

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Xu, Mark Dehong, and Gerry Moschopoulos. "Special Section on Resonant and Soft-Switching Techniques With Wide Bandgap Devices." IEEE Journal of Emerging and Selected Topics in Power Electronics 7, no. 2 (2019): 606–8. http://dx.doi.org/10.1109/jestpe.2019.2905112.

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Chuang, Ching-Chun, Chih-Chiang Hua, Chong-Yu Huang, and Li-Kai Jhou. "Modeling a Dual-Mode Controller Design for a Quasi-Resonant Flyback Converter." Applied Sciences 9, no. 9 (2019): 1860. http://dx.doi.org/10.3390/app9091860.

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The proposed system can overcome the disadvantage of a high peak current in quasi-resonant fly-back (QRF) converters when operated under heavy load conditions. The operating mode and control scheme of a QRF converter with dual-mode control were established and analyzed. The dual-mode control scheme not only enabled a valley-switching detection technique that satisfied the zero-voltage switching condition but also provided a constant frequency mechanism to reduce the conduction loss in QRF converters when operated in a continuous conduction mode and under heavy load conditions. The small-signal equivalent circuit model of QRF converter circuits was constructed using an average approximation method. The technological advancement of a QRF converter with a dual-mode controller was presented in this study. The circuit simulation result of the proposed QRF converter with a mix control scheme proved that the derived circuit component parameters meet the requirements of the converter.

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Kwon, Soon-Kurl, and Sang-Pil Mun. "The Next Generation Apartment Model Far Infrared Rays Radiant Heater using Quasi-Resonant Soft Switching PWM Inverter." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 22, no. 11 (2008): 15–22. http://dx.doi.org/10.5207/jieie.2008.22.11.015.

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Mun, Sang-Pil, Chil-Ryong Kim, Jong-Kurl Lee, Man-Kyu Park, and Soon-Kurl Kwon. "Soft Switching Inverter with An Auxiliary Active Quasi-Resonant DC Link Snubber for AC Servo Motor Drive." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 22, no. 3 (2008): 79–87. http://dx.doi.org/10.5207/jieie.2008.22.3.079.

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Shukla, J., and B. G. Fernandes. "Quasi-resonant dc-link soft-switching PWM inverter with active feedback clamp circuit for motor drive applications." IEE Proceedings - Electric Power Applications 153, no. 1 (2006): 75. http://dx.doi.org/10.1049/ip-epa:20050119.

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ECHAVARRÍA, R., V. SÁNCHEZ, M. PONCE, M. COTOROGEA, and A. CLAUDIO. "ANALYSIS AND DESIGN OF A QUASI-RESONANT FAST ON-LOAD TAP CHANGING REGULATOR." Journal of Circuits, Systems and Computers 13, no. 04 (2004): 877–99. http://dx.doi.org/10.1142/s0218126604001738.

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The main function of the on-load tap changing (OLTC) regulators consists of maintaining a constant voltage in order to feed critical loads despite the load changes or voltage changes in the ac mains. The traditional regulators are still used nowadays, but they present several disadvantages, like a slow response, which reaches from 100 ms to several seconds. These drawbacks can be overcome if the OLTC regulators would have shorter response time, commuting several times every cycle of the mains. There are two basic topologies for fast OLTC regulators. The first one consists of several taps and uses hard switching. The second one consists of two main switches commuting at high frequency, using soft-switching in order to reduce the power losses. The present topology is of the second type. This paper presents a mathematical model of the power stage of the proposed regulator. The model includes the parasitic resistances and the leakage inductances in order to obtain a better comprehension of the regulator operation. A parametric analysis has been done in order to observe the influence of the parasitic elements in the performance of the main parameters of the topology. The model is verified by experimental results obtained using a 500-W prototype.

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Ishibashi, M., M. Nakaoka, and Y. Konishi. "Performance evaluations of three-phase current-fed soft switching PWM converter with switched capacitor-type quasi-resonant snubber." IEE Proceedings - Electric Power Applications 148, no. 5 (2001): 431. http://dx.doi.org/10.1049/ip-epa:20010488.

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Tabisz, W. A., and F. C. Y. Lee. "Zero-voltage-switching multiresonant technique-a novel approach to improve performance of high-frequency quasi-resonant converters." IEEE Transactions on Power Electronics 4, no. 4 (1989): 450–58. http://dx.doi.org/10.1109/63.41774.

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Terai, Haruo, Izuo Hirota, Takahiro Miyauchi, Hideki Omori, Koki Ogura, and Mutsuo Nakaoka. "Comparative Performance Evaluations of IGBTs and MCT incorporated into Voltage-Source Type Single-Ended Quasi-Resonant Zero Voltage Soft Switching Inverter." IEEJ Transactions on Industry Applications 122, no. 5 (2002): 448–56. http://dx.doi.org/10.1541/ieejias.122.448.

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Terai, Haruo, Izuo Hirota, Takahiro Miyauchi, Hideki Omori, Koki Ogura, and Mutsuo Nakaoka. "Comparative performance evaluations of IGBTs and MCT incorporated into voltage-source-type single-ended quasi-resonant zero-voltage soft switching inverter." Electrical Engineering in Japan 144, no. 3 (2003): 58–68. http://dx.doi.org/10.1002/eej.10151.

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Ma, Hongbo, Junhong Yi, Jie Shuai, and Jie Yang. "Low Input Current Ripple Quasi-Single-Stage Power Supply Based on Double Resonant Tank LLC Converter for Maglev Control System Applications." Journal of Circuits, Systems and Computers 25, no. 06 (2016): 1650064. http://dx.doi.org/10.1142/s021812661650064x.

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High input voltage, multiple low voltage outputs and high working temperature are the main design challenges for magnetic levitation (maglev) control power supply. The traditional solutions have several problems, such as the uncontrolled duty ratio, the poor cross-regulation capability and low reliability. In order to solve these problems, a quasi-single-stage solution employing the double resonant tank LLC topology is proposed and developed in this paper. The proposed solution can increase significantly the overall conversion efficiency because of the achieved soft-switching over the entire operation range. Moreover, the low input current ripple, high magnetic utilization and high reliability can be achieved. Experimental results of a 210-W laboratory prototype with 220–380[Formula: see text]V input and four outputs are presented to demonstrate the declared features.

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Urpelainen, Samuli, Conny Såthe, Walan Grizolli, et al. "The SPECIES beamline at the MAX IV Laboratory: a facility for soft X-ray RIXS and APXPS." Journal of Synchrotron Radiation 24, no. 1 (2017): 344–53. http://dx.doi.org/10.1107/s1600577516019056.

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SPECIES is an undulator-based soft X-ray beamline that replaced the old I511 beamline at the MAX II storage ring. SPECIES is aimed at high-resolution ambient-pressure X-ray photoelectron spectroscopy (APXPS), near-edge X-ray absorption fine-structure (NEXAFS), X-ray emission spectroscopy (XES) and resonant inelastic X-ray scattering (RIXS) experiments. The beamline has two branches that use a common elliptically polarizing undulator and monochromator. The beam is switched between the two branches by changing the focusing optics after the monochromator. Both branches have separate exit slits, refocusing optics and dedicated permanent endstations. This allows very fast switching between two types of experiments and offers a unique combination of the surface-sensitive XPS and bulk-sensitive RIXS techniques both in UHV and at elevated ambient-pressure conditions on a single beamline. Another unique property of the beamline is that it reaches energies down to approximately 27 eV, which is not obtainable on other current APXPS beamlines. This allows, for instance, valence band studies under ambient-pressure conditions. In this article the main properties and performance of the beamline are presented, together with selected showcase experiments performed on the new setup.

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Yonemori, Hideto, and Mutsuo Nakaoka. "Novel Transformer-Assisted Quasi-Resonant DC Link Circuit Family Operating under No Predictive Load Current Control Scheme for Soft-Switching Realization and Its Optimum Design." IEEJ Transactions on Industry Applications 115, no. 9 (1995): 1098–107. http://dx.doi.org/10.1541/ieejias.115.1098.

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Chakraborty, Sajib, Hai-Nam Vu, Mohammed Mahedi Hasan, Dai-Duong Tran, Mohamed El Baghdadi, and Omar Hegazy. "DC-DC Converter Topologies for Electric Vehicles, Plug-in Hybrid Electric Vehicles and Fast Charging Stations: State of the Art and Future Trends." Energies 12, no. 8 (2019): 1569. http://dx.doi.org/10.3390/en12081569.

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This article reviews the design and evaluation of different DC-DC converter topologies for Battery Electric Vehicles (BEVs) and Plug-in Hybrid Electric Vehicles (PHEVs). The design and evaluation of these converter topologies are presented, analyzed and compared in terms of output power, component count, switching frequency, electromagnetic interference (EMI), losses, effectiveness, reliability and cost. This paper also evaluates the architecture, merits and demerits of converter topologies (AC-DC and DC-DC) for Fast Charging Stations (FCHARs). On the basis of this analysis, it has found that the Multidevice Interleaved DC-DC Bidirectional Converter (MDIBC) is the most suitable topology for high-power BEVs and PHEVs (> 10kW), thanks to its low input current ripples, low output voltage ripples, low electromagnetic interference, bidirectionality, high efficiency and high reliability. In contrast, for low-power electric vehicles (<10 kW), it is tough to recommend a single candidate that is the best in all possible aspects. However, the Sinusoidal Amplitude Converter, the Z-Source DC-DC converter and the boost DC-DC converter with resonant circuit are more suitable for low-power BEVs and PHEVs because of their soft switching, noise-free operation, low switching loss and high efficiency. Finally, this paper explores the opportunity of using wide band gap semiconductors (WBGSs) in DC-DC converters for BEVs, PHEVs and converters for FCHARs. Specifically, the future roadmap of research for WBGSs, modeling of emerging topologies and design techniques of the control system for BEV and PHEV powertrains are also presented in detail, which will certainly help researchers and solution engineers of automotive industries to select the suitable converter topology to achieve the growth of projected power density.

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Nagai, Shinichiro, Shinji Sato, Masayoshi Yamamoto, Eiji Hiraki, and Mutsuo Nakaoka. "Effective Improvement of DC Busline Voltage Utilization Factor in Two Switch-Auxiliary Quasi-Resonant DC Link Snubber Assisted Three Phase Voltage Source Type Soft-Switching PWM Inverter." IEEJ Transactions on Industry Applications 123, no. 6 (2003): 710–16. http://dx.doi.org/10.1541/ieejias.123.710.

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Fathy, Khairy, Keiki Morimoto, Ki-Young Suh, Soon-Kurl Kwon, and Mutsuo Nakaoka. "A Novel Prototype of Duty Cycle Controlled Soft-Switching Half-Bridge DC-DC Converter with Input DC Rail Active Quasi Resonant Snubbers Assisted by High Frequency Planar Transformer." Journal of Electrical Engineering and Technology 2, no. 1 (2007): 89–97. http://dx.doi.org/10.5370/jeet.2007.2.1.089.

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"Analysis of a series resonant AC/DC converter with integral cycle mode control for high frequency AC distribution systems." WSEAS TRANSACTIONS ON POWER SYSTEMS 15 (March 5, 2020). http://dx.doi.org/10.37394/232016.2020.15.5.

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The study of a resonant AC/DC converter, thought for high frequency sinusoidal AC power distribution systems, is performed in this article. The control switch is commuted at the resonant current zero crossings, staying closed (or open) for a certain number of complete cycles. This commutation strategy, known as “integral cycle mode control”, gives soft-switching which improves efficiency, minimizes EMI and increases reliability and converter life span. Also, the input current has a low THD and a good power factor. A suitable scheme to control the converter is proposed. It consists of an internal loop based on sliding mode techniques, for regulating the amplitude of the resonant current, and an external PI loop with an added feed-forward action, that sets the DC output voltage. The main objective is minimizing the disturbing effect that variations in the AC bus voltage and load consumption have over the DC output voltage. For the design of the control laws, a model expressed in terms of rectified and averaged sinusoidal variables is employed. Computer simulations have been performed, considering typical surrounding conditions for this kind of application. The obtained results show that the converter DC output voltage stay always close to its reference value, presenting good rejection against the aforementioned disturbances

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