Sensorless Speed Control with Initial Rotor Position Estimation for Surface Mounted Permanent Magnet Synchronous Motor Drive in Electric Vehicles

Xuan Wu, Hui Wang, Shoudao Huang, Keyuan Huang and Li Wang
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Xuan Wu: Green Car Collaborative Innovation Center of Hunan Province, Hunan University, Changsha 410082, China
Hui Wang: Green Car Collaborative Innovation Center of Hunan Province, Hunan University, Changsha 410082, China
Shoudao Huang: Green Car Collaborative Innovation Center of Hunan Province, Hunan University, Changsha 410082, China
Keyuan Huang: Green Car Collaborative Innovation Center of Hunan Province, Hunan University, Changsha 410082, China
Li Wang: Green Car Collaborative Innovation Center of Hunan Province, Hunan University, Changsha 410082, China

Energies, 2015, vol. 8, issue 10, 1-17

Abstract: The accurate information of the initial rotor position is very critical for successful starting of the Surface-mounted Permanent Magnet Synchronous Motor (SPMSM). In order to solve the problems of low accuracy and unreliability in the conventional estimation strategy, in this paper, an improved initial rotor position estimation strategy without any position sensor for SPMSM at standstill is proposed based on rectangular pulse voltage injection. In the work, when the second series of pulse voltages were applied. By the ways of strengthening the effect of weakening or strengthening magnetic fields and increasing the difference between each current of the vector. The improved strategy enhanced reliability and raised the initial position estimation accuracy from 7.5° to 1.875°. The improved strategy does not need any additional hardware. Experimental results demonstrate the validity and usefulness of the improved strategy.

Keywords: surface-mounted permanent magnet synchronous motor; initial rotor position; inductance saturation effect (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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