The Research on Energy Transfer Efficiency of PMSM with Stochastic PWM

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Gao, Yuan^1 ; Ma, Jiaqing^1 ; Wu, Qinmu^1 ; Yang, Chaojiang^1 ; Xie, Meixiu^1

School of Electrical Engineering, Guizhou University, Guiyang

550025, China^1

关键词: Control technologies;    Energy transfer efficiency;    Fixed switching frequency;    Permanent Magnet Synchronous Motor;    PWM controllers;    Random factors;    Switching process;    Voltage source inverter;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/3/032195/pdf
DOI  :  10.1088/1755-1315/252/3/032195

来源: IOP

【 摘 要 】

The pulse width modulation (PWM) technique is widely used in control of permanent magnet synchronous motor (PMSM). The switching process with fixed switching frequency results in useless harmonics. In an inverter with PWM, the dead time result in harmonics to the drive systems. And the dead time will reduce the energy transfer efficiency in PMSM drives. This paper proposes PWM controller with random dead time for voltage-source inverters used in PMSM drives. The proposed method will directly add random factors to dead time to realize the randomness of PWM. This technique can effectively reduce the harmonics in this systems. Therefore, the purpose of improving PMSM control technology energy transfer efficiency is achieved. Finally, effectiveness of the proposed strategy is validated by simulation.