Sensorless Optimal Commutation Steady Speed Control Method for a Nonideal Back-EMF BLDC Motor Drive System Including Buck Converter

被引:33
|
作者
Chen, Xi [1 ,2 ]
Liu, Gang [1 ,2 ]
机构
[1] Beihang Univ BUAA, Sch Instrumentat Sci & Optoelect Engn, Beijing 100191, Peoples R China
[2] Beihang Univ BUAA, Ningbo Inst Technol, Ningbo 315800, Peoples R China
基金
中国国家自然科学基金;
关键词
Commutation; Torque; Integrated circuit modeling; Inductance; Harmonic analysis; Rotors; Velocity control; Buck converter; brushless dc (BLDC) motor; linearization method; nonideal back-electromotive force (EMF); nonlinear BLDC model; optimal commutation; sensorless control; steady speed control; OUTPUT FEEDBACK-LINEARIZATION; DIRECT TORQUE CONTROL; DC-DC CONVERTERS; DESIGN;
D O I
10.1109/TIE.2019.2945282
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
For the low inductance brushless dc motor with nonstandard trapezoidal waveform and asymmetric three-phase back-EMF, this article first analyses the influence of nonideal back-EMF on the position of the detected commutation point when sensorless method is applied. Then, the fluctuations of electromagnetic torque driven by square wave current are compared when commutating according to several different commutation points, and the optimal commutation control method is proposed. In addition, for the low inductor motor with nonideal back-EMF and buck front-end drive circuit structure, an integrated nonlinear model of motor and buck drive circuit including precise back-EMF parameters is established. Based on the nonlinear model, the feasibility of model linearization is analyzed. The linearization method based on input-output feedback method is proposed, and a steady-state controller based on linearization model is designed. Finally, experimental results verify the effectiveness of the proposed optimal commutation control and steady speed controller.
引用
收藏
页码:6147 / 6157
页数:11
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