Initial Position Estimation in SRM Using Bootstrap Circuit Without Predefined Inductance Parameters

被引:73
作者
Shen, Lei [1 ]
Wu, Jianhua [1 ]
Yang, Shiyou [1 ]
机构
[1] Zhejiang Univ, Coll Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China
关键词
Bootstrap circuit; initial position estimation; pulse injection method; switched reluctance motor (SRM); RELUCTANCE MOTOR DRIVE; SENSORLESS CONTROL; ROTOR-POSITION; ENTIRE SPEED;
D O I
10.1109/TPEL.2011.2107334
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Initial position estimation is an essential concern for switched reluctance motor (SRM) sensorless controls. However, the existing approaches have a strong dependence on the predefined inductance model, suffer from the electromagnetic interference (EMI), and require high-bandwidth controllers. In this paper, a method to estimate the initial rotor position of SRMs using bootstrap circuits is presented. This method seeks to obtain the rotor position at standstill by analyzing the time required for the charging current reaching its peak value in the bootstrap circuit. This method has many advantages such as the independence of any inductance parameter, the requirement of lower bandwidths of the control system, the reduced EMI influence, and no movement induced to the rotor. The feasibility and the applicability of the proposed method are verified by simulation and experiment studies. Also, the influence of motor parameters on the estimated results is analyzed.
引用
收藏
页码:2449 / 2456
页数:8
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