Synchronous Optimal Torque PWM with Low Torque Ripple under Low Carrier Ratio

2021 ◽  
Author(s):  
Zhihao Song ◽  
Wenxi Yao ◽  
Senqing Zhuo ◽  
Wuhua Li
Keyword(s):  
Torque Ripple ◽  
Low Torque

scholarly journals A Modified Model Predictive Torque Control with Parameters Robustness Improvement for PMSM of Electric Vehicles

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 132
Author(s):  
Siyu Gao ◽  
Yanjun Wei ◽  
Di Zhang ◽  
Hanhong Qi ◽  
Yao Wei
Keyword(s):  
Real Time ◽  
Torque Ripple ◽  
Torque Control ◽  
Parameter Mismatch ◽  
Modified Model ◽  
Simulation And Experiment ◽  
Drive Systems ◽  
Low Torque ◽  
Time Update ◽  
Model Reference Adaptive

Model predictive torque control with duty cycle control (MPTC-DCC) is widely used in motor drive systems because of its low torque ripple and good steady-state performance. However, the selection of the optimal voltage vector and the calculation of the duration are extremely dependent on the accuracy of the motor parameters. In view of this situation, A modified MPTC-DCC is proposed in this paper. According to the variation of error between the measured value and the predicted value, the motor parameters are calculated in real-time. Meanwhile, Model reference adaptive control (MRAC) is adopted in the speed loop to eliminate the disturbance caused by the ripple of real-time update parameters, through which the disturbance caused by parameter mismatch is suppressed effectively. The simulation and experiment are carried out on MATLAB / Simulink software and dSPACE experimental platform, which corroborate the principle analysis and the correctness of the method.

scholarly journals Fast Torque Computation of Hysteresis Motors and Clutches Using Magneto-static Finite Element Simulation

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3311 ◽  
Author(s):  
Gianvito Gallicchio ◽  
Marco Palmieri ◽  
Mauro Di Nardo ◽  
Francesco Cupertino
Keyword(s):  
Finite Element ◽  
Torque Ripple ◽  
Electrical Machine ◽  
Fe Modelling ◽  
Finite Element Software ◽  
Constant Torque ◽  
Element Simulation ◽  
Normal Magnetization ◽  
Low Efficiency ◽  
Low Torque

Hysteresis motor and clutches have several advantages, such as constant torque from zero to synchronous speed, low torque ripple, and low fabrication cost. Low efficiency and power factor are the main features that have limited the application of this type of electrical machine to few applications. Being a niche argument, little literature has addressed the problem of analytical and finite element (FE) modelling of hysteresis electrical machines. This paper first describes the most important contributions of the literature on the analytical and FE modelling of hysteresis motors and clutches and then proposes a method for the fast computation of its performance. The proposed procedure consists of two steps: first, a magneto-static FE simulation is performed considering the normal magnetization curve of the hysteresis material; then, the average torque is computed by a post-processing analysis. The proposed method is used to analyze a hysteresis clutch and the obtained results are compared with those achieved using a commercial finite element software that implements a vector hysteresis model.

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