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Journal articles on the topic 'Speed-torque characteristic'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Wang, Gui Juan. "The Experimental Study on "Soft Start" of Mine Permanent Magnet Coupling." Applied Mechanics and Materials 727-728 (January 2015): 403–5. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.403.

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The "soft start" problem was studied for magnetic coupling in coal mine by experimental method. At first, the starting condition of magnetic coupling was analysed. Aaccording to the load characteristics of conveyor. Secondly, the torque characteristic curve, speed characteristic curve and current starting curve were plotted using the experimental data. From three kinds of characteristic curve we have conclusion that the output torque and output speed is much less than the input torque and input speed, the starting current value with the load was less than the starting current value when direct

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2

Zeng, Hui, Zhe Chen, and Hao Chen. "Smooth Torque Speed Characteristic of Switched Reluctance Motors." Journal of Power Electronics 14, no. 2 (2014): 341–50. http://dx.doi.org/10.6113/jpe.2014.14.2.341.

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3

Chan, T. F. "Determination of the Torque-Speed Characteristic of an Induction Motor Using a Curve-Fitting Technique." International Journal of Electrical Engineering & Education 30, no. 4 (1993): 360–65. http://dx.doi.org/10.1177/002072099303000410.

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Determination of the torque-speed characteristic of an induction motor using a curve-fitting technique This paper describes the use of a curve-fitting technique to deduce the nominal torque-speed characteristic of a three-phase induction motor from the speed data obtained in a no-load acceleration test. Experimental results show that the fitted curve is reasonably close to the torque-speed characteristic obtained from an actual load test.

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4

Aree, Pichai. "Analytical determination of speed-torque and speed-current curves of single-cage induction motor under supply voltage and frequency variations." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 6 (2018): 2279–98. http://dx.doi.org/10.1108/compel-09-2017-0404.

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Purpose An important characteristic of most induction motors is speed- or slip-torque curve. A simplified Kloss formula is widely used for describing speed-torque characteristic because it is fairly simple. Only two parameters related to break-down torque and break-down slip are regarded as input parameters. Because this simplified formula ignores an unknown parameter that is a ratio between Thevenin’s and rotor resistances, an accurate torque curve characteristic may not be fully obtained over an entire speed range. Moreover, the conventional Kloss formula does not offer a speed-torque curve

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5

Cheraghi, Mohsen, Mohammad Bayati Booin, Mohammad Mahmoudian Esfahani, and Mohammad Mehdi Derakhshani. "Determination of torque‐speed characteristic for a two‐speed elevator induction machine." IET Electric Power Applications 12, no. 2 (2017): 239–46. http://dx.doi.org/10.1049/iet-epa.2017.0236.

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6

Inaguma, Y. "Friction torque characteristics of an internal gear pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 6 (2011): 1523–34. http://dx.doi.org/10.1177/0954406211399659.

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This paper describes the influence of pump operating conditions, such as operating pressures, pump speeds, and oil temperatures, on the friction torque characteristics of internal gear pumps for automobiles. Additionally, it presents a new mathematical model reflecting the influence of the oil temperature on the friction torque. In an internal gear pump, the friction torque was affected by oil temperature as well as operating pressure and pump speed. When the operating pressure was high, the influence of oil temperature on friction torque at a pump speed of less than 1000 r/min was contrary to

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7

Ma, Xin Lei, and Yong Feng Guo. "Research on Fuzzy Control Automotive Electronic Power Steering Characteristic." Applied Mechanics and Materials 392 (September 2013): 329–32. http://dx.doi.org/10.4028/www.scientific.net/amm.392.329.

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The driving stability and comfort-ability are directly influenced by steering system, and it is a critical component in an automobile. Torsion bar torque sensor signal and the vehicle speed signal are used to calculate the assisting torque that on the motor shaft. The rules about how to calculate desired torque signal is very important for driving portability and stability. Influence of motor control strategy on assisting response characteristic. In this paper adaptive fuzzy control rules is proposed for the assisting characteristic and power motor. Base on assistance characteristic and assist

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8

Leung, W. S., and C. C. Chan. "Test Equipment for Induction Motors." International Journal of Electrical Engineering & Education 24, no. 1 (1987): 57–64. http://dx.doi.org/10.1177/002072098702400112.

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The paper describes test equipment for measuring the torque of an induction motor over the full range of its speed and for plotting the motor's important torque-speed characteristic on an oscilloscope. The torque sensor is a strain gauge and the test includes the measurement of the switching transient torque.

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9

Huang, Qi, Yun Qing Li, Cheng Kei Liu, and Xiao Li Lai. "Research on Intake System of Motorcycle Engine to Obtain High Torque at Low and Medium Speed." Applied Mechanics and Materials 233 (November 2012): 266–69. http://dx.doi.org/10.4028/www.scientific.net/amm.233.266.

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The new intake system is designed and the intake pipe is changed in order to get high torque at low and medium speed. After the intake parameters are changed, the intake dynamic effect is utilized to increase volumetric efficiency and torque at the low and medium speed by theory analyses. Through further research, it is found that intake pipe length has a quite great influence on torque characteristic. Extending intake pipe length can improve engine torque at low and medium speed and its maximum torque point is shifted from high speed scope to low and medium speed scope.

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10

Levy, D. "Derivation of the Torque—Speed Characteristic of a Reaction Turbine." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 207, no. 3 (1993): 165–72. http://dx.doi.org/10.1243/pime_proc_1993_207_030_02.

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When a reaction turbine is coupled to a generator or when an electric motor is coupled to a pump, the torque–speed characteristic of the runner needs to be known so that the control engineer can analyse the system for stability and optimal operation. The currently used one-dimensional vector analysis applies only where there is smooth flow in the inlet of the machine. This paper modifies and extends this analysis to apply to a variable flow situation which occurs when the load on the machine is not equal to the optimal specified load. Runaway speed and starting torque of the machine can also b

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11

Jin, Li Qiang, Chuan Xue Song, and Shi Xin Song. "The Analysis and Experimental Verification of the Hump Characteristic of Viscous Couple." Advanced Materials Research 569 (September 2012): 517–20. http://dx.doi.org/10.4028/www.scientific.net/amr.569.517.

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During working, the speed difference between the driving and driven plate of the viscous couple will generate heat and increase the temperature of the silicon oil, inflate the volume, increase the pressure, and eventually deliver more torque. This phenomenon is called the hump characteristic. In this paper, the cause of the hump characteristic will be discussed. By analyzing the characteristic of ideal gas, the variation characteristic in internal pressure is obtained. A viscous limited slip differential is development to test the hump characteristics and to get the peak value occurrence time

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12

Su, Shi Bin, Yi Kai Shi, Kang Han, and Xiao Qing Yuan. "Optimal Design of Transverse Flux Permanent Motor with Reducing Cogging Torque." Applied Mechanics and Materials 385-386 (August 2013): 1197–200. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.1197.

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Transverse Flux Permanent-magnet Motor has low speed, high torque density characteristics. In order to reduce cogging torque, a novel topology model of transverse flux motor has been designed for electric vehicle wheel in this paper. Its remarkable characteristic is sufficient to reduce the cogging torque, raise motor output torque and raise utilization ratio to the space in electric vehicle wheel. The cogging torque of the prototype model is calculated through the three dimensional finite element analysis methods. The result shows that the theoretical research method is effective and topology

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13

Cui, Jun Guo, Wen Sheng Xiao, Jian Bo Zhao, Jing Xi Lei, Xiao Dong Wu, and Zhi Gang Wang. "Development and Application of Low-Speed and High-Torque Permanent Magnet Synchronous Motor." Applied Mechanics and Materials 229-231 (November 2012): 888–94. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.888.

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To meet the demands of direct-drive petroleum equipment, developed a low-speed and high-torque permanent magnet synchronous motor. By analyzing and identifying the suitable key parameters such as permanent magnet structure parameters, air gap length, type and size of Stator Slot and so on, designed permanent magnet synchronous motor with the torque 10800 Nm, the rated speed 30 r/min and high efficiency and power factor. Obtained the flux density distribution situation and characteristic curves under no-load working condition through simulation and analysis. Manufactured the low-speed and high-

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14

Wang, Yan Fang, and Lin Lin He. "Effect of Magnetic Circuit’s Structure Parameters on Torque-Speed Characteristic for Electromagnetic Damper." Advanced Materials Research 383-390 (November 2011): 2038–44. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.2038.

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The electromagnetic damper studied in this paper belongs to a special kind of coreless generator, which is primarily used for the energy absorption and dissipation in space docking mechanism buffer system. The parameters of magnetic circuit tructure which determines the air-gap flux density are important factors in affecting damping torque. Three-dimensional models are built based on MagNet of Infolytic corporation in this paper. The effects of structure parameters of magnetic circuit such as magnet material, magnetic pole-pairs, rotor thickness on the torque-speed characteristic are researche

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15

Li, Qiang, and Chang Gao Xia. "Research of Electric Power Steering System Assistance Characteristic Based on the Identification of the Road." Advanced Materials Research 756-759 (September 2013): 4401–6. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.4401.

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Study of traditional assist characteristic cure does not take into account the difference of steering resistance torque caused by different road adhesion coefficient. Vehicle dynamics analysis model is established based on ADAMS/CAR. Simulation of steering wheel torque is realized under different road conditions. Departure from the ideal boost characteristics requirements and combined with ideal steering wheel torque under different speed and lateral acceleration., the article built assist characteristic curve under a certain road conditions. The system can real-time select the assist characte

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16

Sawase, K., and K. Inoue. "Maximum acceptable differential speed ratio of lateral torque-vectoring differentials for vehicles." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 223, no. 8 (2009): 967–78. http://dx.doi.org/10.1243/09544070jauto1148.

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A lateral torque-vectoring differential consists of a slip clutch for torque vectoring from right to left, another slip clutch for torque vectoring from left to right, differential gears, and some planetary gears which generate the differential speeds of the slip clutches. The present authors introduced a design parameter, namely the maximum acceptable differential speed ratio, and showed that the design parameter is very useful to analyse the lateral torque-vectoring differentials. The minimum of the design parameter is determined by the vehicle driving condition in which the torque-vectoring

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17

Shi, Guo Biao, Jin Long Cui, and Peng Gu. "Matching Design of Assist Characteristic for Electric Hydraulic Power Steering System of Electric Bus." Applied Mechanics and Materials 427-429 (September 2013): 235–40. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.235.

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Electric hydraulic power steering system (EHPS) has the characteristics of high energy efficiency and reliability. In this paper, we focus on the design and analysis of assist characteristic for EHPS of electric bus. The relationship of steering assist power, steering wheel torque and steering resisting torque was analyzed; steering system model and vehicle dynamic model were built. By EHPS simulation, the relationship of pump flow rate, steering wheel angular velocity and vehicle speed was deduced and 3-D assist characteristic curve map was plotted, which was suitable for electric bus. In ord

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18

Geng, Guo Qing, Hao Bin Jiang, Jia Yin Dong, Tao Jiang, and Tao Liu. "Modeling and Characteristics Research of Proportional-Valve Hydraulic Power Steering of Commercial Vehicle." Advanced Materials Research 765-767 (September 2013): 357–60. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.357.

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Dynamics model of mechanical system and hydraulic system inclued electro-hydraulic proportional valve of Proportional-Valve Hydraulic Power Steering were established.and simulation model of assisted characteristic of PVHPS system was build .Response characteristic of proportional valve bypass flow was analyzed at different speed, and higher of the speed, greater of the flow in the bypass flow is . Steering wheel torque increases gradually as vehicle speed increases at the same wheel angle, and driver's better steering road feeling can be ensured. As wheel steering torque increases, assisted oi

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19

Steiros, K. "Transient torque in stirred tanks." Journal of Fluid Mechanics 831 (October 13, 2017): 554–78. http://dx.doi.org/10.1017/jfm.2017.652.

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The transient dynamics of stirred tanks whose impeller speed undergoes smooth or step changes is investigated. First, a low-order model is developed, linking the impeller torque with the ‘extent’ of the solid-body rotation in the tank, derived from an angular momentum balance in a control volume around the impeller. Utilisation of this model enables the prediction of the torque ‘spike’ appearing after an impulsive change of the shaft speed, and of the torque evolution during a quasi-steady transition. For the case of a small impulsive change in the shaft speed, a characteristic spin-up time is

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20

Kochergin, V. V. "Adjustment of the speed-torque characteristic of a synchronous thyratron motor." Russian Electrical Engineering 78, no. 6 (2007): 332–34. http://dx.doi.org/10.3103/s1068371207060119.

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21

Xia, Xin Tao, Tao Mei Lv, and Fan Nian Meng. "Chaotic Characteristic and Nonlinear Dynamic Performance of Rolling Bearing Friction Torque." Applied Mechanics and Materials 26-28 (June 2010): 88–92. http://dx.doi.org/10.4028/www.scientific.net/amm.26-28.88.

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Based on the chaotic theory, the methods of the Lyapunov exponent and the box dimension were applied to evaluate the chaotic characteristic and the nonlinear dynamic performance of the rolling bearing friction torque. The time series were obtained via the experimental investigation on the friction torque of the rolling bearings under the condition of different rotational speeds. It is found that the rolling bearing friction torque is of a chaotic system because the maximum of Lyapunov exponents of its time series is greater than zero according to the chaotic theory. And the result shows that t

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22

Yu, Peng, Tong Zhang, and Pu Hui Liu. "NVH Characteristic Prediction of an Electric Vehicle Reducer." Advanced Materials Research 608-609 (December 2012): 1656–59. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.1656.

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Taking certain electric vehicle as target, tangential electromagnetic torque and harmonic analysis of drive motor is obtained using Ansoft 2D model. The inherent characteristic, propagated error, frequency response characteristics and waterfall curves of bearing are obtained using Romax 3D model. Then the NVH characteristic of driveline under certain rotational speed is evaluated, results can be applied to the structural matching of the driveline system for electric vehicles.

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23

Shoba, P., and B. Arivuselvam. "Induction Motor Conditional Monitoring Using Wireless Sensor Network." Applied Mechanics and Materials 626 (August 2014): 95–100. http://dx.doi.org/10.4028/www.scientific.net/amm.626.95.

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This system is used for monitoring the speed, torque, efficiency, voltage & current by employing ZigBee based wireless sensor network. Embedded system is used for acquiring electrical signals from the motors in a non-invasive way. The speed and torque estimation is done locally. An embedded system is used to control the speed of the motor the values calculated by the embedded system are transmitted to the monitoring unit through ZigBee based wireless sensor network and it can be monitored locally in PC. The main advantages of using ZigBee are low maintenance cost, security, reliability and

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24

Zhang, Lingtan, Yue Shen, Long Wang, Jia Jia, and Lingzhi Wei. "Rotation Speed Control of the Rotary Valve in MWD Tools Based on Speed Feedforward Compensation." Mathematical Problems in Engineering 2021 (April 5, 2021): 1–8. http://dx.doi.org/10.1155/2021/5565672.

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The rotary valve speed control, seriously affected by the nonlinear characteristic of rotary valve load torque, affects the generation of drilling fluid pressure phase shift keying (PSK) signal and its quality. The calculation model feedforward of the load torque acts on the speed control system and enables the motor voltage to change according to the law of calculation model, and the linearization correction of the speed system is performed. Additionally, the flow measurement is introduced into the calculation model of the load torque to track the load torque change with the flow, suppressing

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25

Sato, Mitsuhide, Keigo Takazawa, Manabu Horiuchi, et al. "Reducing Rotor Temperature Rise in Concentrated Winding Motor by Using Magnetic Powder Mixed Resin Ring." Energies 13, no. 24 (2020): 6721. http://dx.doi.org/10.3390/en13246721.

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The demand for high-speed servomotors is increasing, and minimal losses in both high-speed and high-torque regions are required. Copper loss reduction in permanent magnet motors can be achieved by configuring concentrated winding, but there are more spatial harmonics compared with distributed winding. At high-speed rotation, the eddy current loss of the rotor increases, and efficiency tends to decrease. Therefore, we propose a motor in which a composite ring made from resin material mixed with magnetic powder is mounted on the stator to suppress spatial harmonics. This paper describes three ch

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26

Abe, Takashi, Ryohei Ohba, and Tsuyoshi Higuchi. "Fundamental characteristics and first prototype of a novel claw pole type half-wave rectified variable field flux motor." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 407–23. http://dx.doi.org/10.1108/compel-02-2015-0102.

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Purpose – Recently, considerable attention has been attracted to the development of the new concept motor for EV or HEV. Wider torque and speed controllable operating range and high efficiency under driving area are needed for traction motor. The purpose of this paper is to realize the new concept variable field flux motor with claw pole rotor and brushless robust structure for high-speed range. Design/methodology/approach – In the previous paper, the authors proposed a half-wave rectified brushless variable field flux method with a diode inserted into the field winding. This paper presents a

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27

Yuan, Wen Qi, Yue Liu, Dong Li, and Guo Ying Meng. "Research on Overloading Protection of Permanent Magnetic Coupler in Coal Mine." Applied Mechanics and Materials 597 (July 2014): 492–97. http://dx.doi.org/10.4028/www.scientific.net/amm.597.492.

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In this paper, with simulations and experiments analysed by the software of Ansoft Maxwell, research on overloading protection of permanent magnetic coupler in coal mine is carried out and the conclusive curves of mechanical characteristics are plotted through experimental data. The conclusion can be gained from mechanical characteristic curves: when the output value of torque reaches the maximum torque of magnetic coupler, the output torque and speed will drop along with increases of the slip, and the input power value of motor is less than the power value at the time when the motor torque va

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28

Li, Lin, and Wei Li. "Study on Efficiency Characteristic of Torque Convertor Transmission System Based on Power Split Principle." Applied Mechanics and Materials 229-231 (November 2012): 634–37. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.634.

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High-power pumps and fans consume much energy in operation. Speed control of them is a major energy-saving way, and it has become a hot topic for research especially in power split speed control field. As the most widely used speed control method, fluid coupling has disadvantage in efficiency which leads to much energy losses. In article, a power split speed control system using torque convertor as speed adjust element is proposed due to practical need of reducing losses. The efficiency characteristic of it is discussed by comparative analysis with other methods and promotion of the system eff

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29

Tang, Bin, Hao Bin Jiang, and Guo Qing Geng. "Model and Dynamic Characteristics of Electromagnetic Split Clutch for Hydraulic Power Steering Application." Applied Mechanics and Materials 644-650 (September 2014): 759–62. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.759.

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In order to improve bus drivers’ high-speed road feel and reduce parasitic loss of hydraulic power steering system (HPS), a novel power steering system is proposed, which is characterized by an electromagnetic slip clutch (ESC) which regulates discharge flow of steering pump to realize variable assist characteristics as well as uniquely transfers on-demand power from ICE to steering pump. The mathematic model of ESC including flux linkage equations, voltage equations, electromagnetic torque equation and kinematic equations under synchronous rotating coordinate system (d-q coordinate) is constr

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30

Wu, Xiao Yu, Zhe Ming Chen, and Ze Hao Huang. "Analysis and Calculation of Electromagnetic Torque for the Voltage Source Traction Motors." Applied Mechanics and Materials 446-447 (November 2013): 672–77. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.672.

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The traction motor installed on the high-speed train is powered by inverter. A large number of harmonics may appear when motor is operating. Then the motor speed generate oscillation and finally the dynamic characteristic is affected in vehicle system. In this paper, relied on the electromagnetism of traction motor, the mechanism about emerging harmonic torque is analyzed. In addition, based on the equivalent circuit, the method of calculating the parameters in harmonic circuit is proposed. Two mathematical formulas are also proposed to obtain the fundamental electromagnetic torque and the har

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31

Li, Cunhe, Cunshan Zhang, Jian Liu, and Dunxin Bian. "A High-Performance Indirect Torque Control Strategy for Switched Reluctance Motor Drives." Mathematical Problems in Engineering 2021 (February 15, 2021): 1–15. http://dx.doi.org/10.1155/2021/6618539.

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This paper proposes a high-performance indirect control scheme for torque ripple minimization in the switched reluctance motor (SRM) drive system. Firstly, based on the nonlinear torque-angle characteristic of SRM, a novel torque sharing function is developed to obtain the optimal current profiles such that the torque ripple is minimized with reduced copper losses. Secondly, in order to track current accurately and indirectly achieve high-performance torque control, a robust current controller is derived through the Lyapunov stability theory. The proposed robust current controller not only con

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32

Al-barbarawi, Omar, and Ghazi M. Qaryouti. "Implementation simulink modeling to analysis the transient cases and torque speed characteristic in a three phase induction motors." Indonesian Journal of Electrical Engineering and Computer Science 16, no. 3 (2019): 1077. http://dx.doi.org/10.11591/ijeecs.v16.i3.pp1077-1087.

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In this research, has been a developed modular approach for investigation of the dynamic behavior and analysis the steady -state and transient cases for a three-phase induction motor when it is fed with a balanced and unbalanced voltage , and analysis the behavior of the Torque-Speed characteristics at various conditions. This analysis is done systematically by development two mathematically models. Where the first model is proposed to simulate the dynamic behavior of the motor when supplying it at balanced and unbalanced voltage in Matlab/Simulink by using d-q axis theory in the reference fra

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33

Guan, Y., Z. Q. Zhu, I. A. A. Afinowi, J. C. Mipo, and P. Farah. "Design of synchronous reluctance and permanent magnet synchronous reluctance machines for electric vehicle application." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 586–606. http://dx.doi.org/10.1108/compel-02-2015-0109.

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Purpose – The purpose of this paper is to minimize the optimization parameter number of synchronous reluctance machine (SynRM) and permanent magnet (PM) assisted SynRM, and compare their relative merits with interior permanent magnet (IPM) machine for electric vehicle applications, in terms of electromagnetic performance and material cost. Design/methodology/approach – The analysis of electromagnetic performance is based on finite element analysis, by using software MAXWELL. The genetic algorithm is utilized for optimization. Findings – The rotor design of SynRM can be significantly simplified

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34

Motto, Frederic Biya, Roger Tchuidjan, Benoît Ndzana, and Colince Tatsa Tchinda. "The Characteristic of Control Algorithms for an Induction Electromotor by the Parameters Change in Stator Winding Voltage." European Journal of Engineering Research and Science 4, no. 4 (2019): 48–51. http://dx.doi.org/10.24018/ejers.2019.4.4.1226.

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Plantić, Marčič, Beković, and Štumberger. "Sensorless PMSM Drive Implementation by Introduction of Maximum Efficiency Characteristics in Reference Current Generation." Energies 12, no. 18 (2019): 3502. http://dx.doi.org/10.3390/en12183502.

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This paper presents the efficiency improvement in a speed closed-loop controlled permanent magnet synchronous machine (PMSM) sensorless drive. The drive efficiency can be improved by minimizing the inverter and the PMSM losses. These can be influenced by proper selection of DC-bus voltage and switching frequency of the inverter. The direct (d-) and quadrature (q-) axis current references generation methods, discussed in this paper, further improve the efficiency of the drive. Besides zero d-axis current reference control, the maximum torque per ampere (MTPA) characteristic is normally applied

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ANDRYCH-ZALEWSKA, Monika, Zdzisław CHŁOPEK, Jerzy MERKISZ, and Jacek PIELECHA. "Exhaust emission from a vehicle engine operating in dynamic states and conditions corresponding to real driving." Combustion Engines 178, no. 3 (2019): 99–105. http://dx.doi.org/10.19206/ce-2019-317.

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The article presents the exhaust emission results from a diesel engine in dynamic states of engine operation in the driving tests: NEDC (New European Driving Cycle) and Malta test, developed at the Poznan University of Technology. The NEDC and Malta tests were carried out as simulations on the engine test bench mimicking the driving tests conditions. The test results of the emission of carbon monoxide, hydrocarbons and nitrogen oxides obtained in each of the tests were presented. The dynamic states have been classified de-pending on the time derivative value of the torque and engine rotational

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Lin, Xiaohua, Junqiang Xi, and Shengqiang Hao. "The calculation model of the friction torque on a dry clutch." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231, no. 13 (2017): 1796–805. http://dx.doi.org/10.1177/0954407016686010.

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The influencing factors of the friction torque on a dry clutch are analysed, the load characteristic of a diaphragm spring is modified and the clutch clamping force model is established by using the modified load characteristic. Also, the friction coefficient model is analysed and established on the basis of the sliding speed, the pressure and the surface temperature of clutch plates using a designed friction coefficient bench. Then, the temperature model of the friction plates is obtained by the finite element programming method, and the calculation model of the friction torque on a dry clutc

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Cui, Hong Wei, Wei Wei, and Qing Dong Yan. "Software Development of Steady Numerical Computational Method of Matching between Hydrodynamic Torque Converter and Engine." Advanced Materials Research 199-200 (February 2011): 323–28. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.323.

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In order to calculate the cooperating characteristic of engine and hydrodynamic torque converter stably and accurately, obtain the best matching of hydrodynamic machine, based on the best matching principles of dynamic and economy, a kind of numerical computational method was put forward. Accuracy of intersection point calculation could be controlled by set step size of torque and rotational speed. The problem of multiple roots and instability of intersection point calculation could be avoided. Based on the graphical user interface (GUI) of MATLAB, the program was completed for matching and th

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Chen, Wei, Yifei Wu, Renhui Du, Qingwei Chen, and Xiaobei Wu. "Speed Tracking and Synchronization of a Dual-Motor System via Second Order Sliding Mode Control." Mathematical Problems in Engineering 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/919837.

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Dual-motor systems have been widely used in industrial applications, and speed synchronization of the motors can always be deteriorated by system parameter uncertainties and load torque perturbations. In this paper, a new robust control strategy for the dual-motor systems is developed by incorporating second order sliding mode control (2-SMC) techniques. The strategy is to design chatting-free control laws to stabilize speed tracking of each motor while synchronizing their velocity. In the proposed scheme, firstly, speed controller for a single motor is designed to eliminate the effects of sys

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Manea, Adriana, Eugen Dobândă, and Milun Babic. "Theoretical and experimental studies on torque converters." Thermal Science 14, suppl. (2010): 231–45. http://dx.doi.org/10.2298/tsci100328018m.

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Lysholm-Smith torques converters has a special importance, due to the fact that this kind of machine can realize a continuously variation of the torque and of the rotational speed to the outlet shaft as function of the resistant torque and, in the same time, an amortization of the shocks and vibrations. This type of torque converter has three turbine stages, intercalated by two stages of reactors (having stationary blades). The present paper presents theoretical and experimental results obtained on a Lysholm-Smith torque converter CHC-380 in the laboratory of Hydraulic Machinery Department fro

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Ren, Qiao, Jimin Zhang, and Jinnan Luo. "Characteristic Analysis and Control of a Rotary Electromagnetic Eddy Current Brake." Applied Computational Electromagnetics Society 36, no. 6 (2021): 806–15. http://dx.doi.org/10.47037/2020.aces.j.360623.

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This article designs an electromagnetic rotating eddy current brake (ECB), which has the advantages of no wear and low noise compared with traditional friction brake. First, using the magnetic circuit analysis model, a theoretical calculation formula of the ECB’s braking characteristics is given. The results show that the braking torque is negatively correlated with the thickness of the air gap as well as the electrical conductivity and the relative magnetic permeability of the brake disc material, and positively correlated with the number of ampere turns and the number of electromagnet poles.

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Lee, Jian Shing, Jeng Haur Horng, and Ming Yuan Chiu. "An Experimental Investigation of the Torque Efficiency in Small Supr Gears." Key Engineering Materials 642 (April 2015): 292–97. http://dx.doi.org/10.4028/www.scientific.net/kem.642.292.

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In present study, a gear transmission system was used to evaluate the effects of oil viscosity, speed, oil temperature as well as the applied load on torque efficiency. The experimental results reveal that the efficiency is increased with the increasing oil temperature and/or applied load whether the multigrade or singlegrade oil was employed. Under a constant torgue, the power loss is increased with the increasing pitch line velocity. The above characteristic resulting from the use of high-viscosity oil yields the substantial variations. However, as the oil film thickness is quite small, the

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Li, Yong Yi, and Sheng Dun Zhao. "Numerical Analysis on the Key Technology in Extrusion Tapping of Internal Thread." Advanced Materials Research 341-342 (September 2011): 436–41. http://dx.doi.org/10.4028/www.scientific.net/amr.341-342.436.

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This paper introduces the principle and characteristic of extrusion tapping of internal thread, presents the simplified mechanical model of extrusion tapping firstly. Then generalizes the key technology of extrusion tapping and their influencing law on tapping torque and thread forming quality, such as extrusion tap type, lead hole diameter, tapping speed and friction. Finally, numerical analysis on the key technology of extrusion tapping are conducted based on DEFORM-3D, the results show that the effect of lead hole diameter and friction on tapping torque are obvious, the effect of extrusion

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Bera, Piotr. "Development of Engine Efficiency Characteristic in Dynamic Working States." Energies 12, no. 15 (2019): 2906. http://dx.doi.org/10.3390/en12152906.

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The objective of this paper is to present a new approach to the problem of combustion engine efficiency characteristic development in dynamic working states. The artificial neural network (ANN) method was used to build a mathematical model of the engine comprising the following parameters: Engine speed, angular acceleration, engine torque, torque change intensity, and fuel mass flow, measured on a test bed on a spark ignition engine in static and dynamic working states. A detailed analysis of ANN design, data preparation, the training method, and the ANN model accuracy are described. The paper

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Sun, Haoyu, Hao Yin, Jiang Liu, and Xilong Zhang. "Preload Optimization Method for Traveling-Wave Rotary Ultrasonic Motor." Processes 9, no. 7 (2021): 1164. http://dx.doi.org/10.3390/pr9071164.

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Preload optimization is very important for ultrasonic motors’ design and application. In this paper, a novel method for a traveling-wave rotary ultrasonic motor is proposed. Firstly, based on linear regression and the analytic hierarchy process (AHP), the mapping between the drive characteristics, mechanical characteristics, speed stability, and preload of the traveling-wave-type rotary ultrasonic motor was established. Then, the characteristic curves of stalling torque, no-load speed, maximum efficiency, and speed stability with the change of preload method were measured with a new test platf

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Chen, Yi, and Jun Liu. "Research on Control Strategy of Differential Assisted Steering of Distributed Drive Electric Vehicle." Applied Mechanics and Materials 431 (October 2013): 241–46. http://dx.doi.org/10.4028/www.scientific.net/amm.431.241.

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The distributed drive electric vehicle was studied in this paper. According to the advantages of the controllable and accurate wheel speed and torque the ideal differential assisted characteristic curve was designed under different vehicle speed as well as a control strategy for differential power steering, a vehicle dynamics model based on CarSim/Simulink and simulation experiments were conducted. The experimental results indicated that on the premise to guarantee the road feeling, the control strategy for differential power steering decreased the steering wheel torque, angle and reduced driv

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Zhang, Lian, Wei Lai, and Jie Li. "Direct Torque Control of the Genetic Neural Network under the Low-Speed." Advanced Materials Research 466-467 (February 2012): 694–97. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.694.

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For the direct torque control of asynchronous motor rapid response and speed ripple, this article proposes the genetic neural network algorithm based on the model of stator flux, to achieve the selecting of switch state under the low-speed. Using the global optimization and search method of genetic algorithm obtains global optimal solution, while the connection weights and network structure learning improve the training effectiveness of neural network, so that the BP network has better adaptive characteristic. The effectiveness of the design is verified by the simulation, and it shows that the

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Guo, Tong Ying, Jie Jia Li, and Hai Chen Wang. "Research on Grinding Robot for Trajectory Control Based on Computed Torque." Applied Mechanics and Materials 58-60 (June 2011): 2392–95. http://dx.doi.org/10.4028/www.scientific.net/amm.58-60.2392.

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In this paper, in order to achieve high-precision trajectory control of grinding robot, the method of computed torque control is proposed based on PD feedback, a single-joint robot experimental platform was built, position and velocity tracking experiment is carried out with empty Load and load. Experimental results show that the method of computed torque based on PD feedback control has the characteristic of quick response speed and small position tracking error.

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Kim, Do-Yun, and Jung-Hyo Lee. "Compensation of Interpolation Error for Look-Up Table-Based PMSM Control Method in Maximum Power Control." Energies 14, no. 17 (2021): 5526. http://dx.doi.org/10.3390/en14175526.

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This paper proposes a compensation method for interpolation error of the maximum power control of a PMSM control system that generates current commands through a look-up table. A torque control system using a look-up table created through experiments has superior characteristics, such as control stability and torque accuracy, compared to a system that executes torque control via a linear controller based on modeling. However, it is impossible to generate information on all the currents for the output torque in the table. Therefore, because the data stored in the look-up table have a discrete c

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Ragunathan, Santiagoo, Hanafi Ismail, and Hussin Kamarudin. "The Effect of Silane Treatment on Processing Characteristic and Swelling Behavior of Polypropylene/Recycled Acrylonitrile Butadiene Rubber/Rice Husk Powder Composites." Key Engineering Materials 471-472 (February 2011): 478–83. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.478.

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The effect of silane treatment on processing characteristic and swelling behavior of recycled acrylonitrile butadiene rubber (NBRr)/polypropylene (PP)/rice husk powder (RHP) composites has been studied. Polypropylene/recycled acrylonitrile butadiene rubber/rice husk powder (PP/NBRr/RHP) composite were prepared by melt mixing technique at 180º C for 9 minutes and 50rpm rotor speed using an internal mixer. Five different composites compositions (70/30/0, 7030/5, 70/30/10, 70/30/15 and 70/30/30), with silane treated RHP (treated) and without silane treatment RHP (untreated) was studied. The speci

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