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| A Compatible SVPWM Method for DC Bus Current Sampling |
| Shen Yongpeng1, Zheng Zhufeng1, Yang Xiaoliang1, Li Huixian2, Tang Yaohua3 |
1. School of Electrical and Information Engineering Zhengzhou University of Light Industry Zhengzhou 450002 China;
2. Zhengzhou Yutong Bus Co. Ltd Zhengzhou 451482 China;
3. Rundian Energy Science Technology Co. Ltd Zhengzhou 450000 China |
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Abstract Aiming at the voltage space vector pulse width modulation problem of DC bus sampling motor control system, the current sampling mechanism of the traditional SVPWM method is analyzed, and the mechanism of the unobservable region in the DC bus sampling system is revealed. By defining the concept of minimum sampling time, the unobservable area of DC bus sampling system is divided accurately, and then the DC bus sampling voltage space vector pulse width modulation method (SSVPWM) and its current reconstruction strategy are proposed by inserting measurement vector and compensation vector. Finally, the experimental results show that the current sampling error is less than 2%, the higher harmonic content of the phase current is lower than 3%, and the THD of the three-phase current is lower than 1.6%, which provides accurate current for high performance vector control.
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Received: 31 December 2019
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2021, Vol. 36 
