Low-cost sensorless control of four-switch, brushless DC motor drive with direct back-EMF detection

被引:9
|
作者
Niasar, Abolfazl Halvaei [1 ,2 ]
Vahedi, Abolfazl [2 ]
Moghbelli, Hassan [3 ]
机构
[1] Univ Kashan, Fac Engn, Dept Elect Engn, Kashan 8731751167, Iran
[2] Iran Univ Sci & Technol, Ctr Excellence Power Syst Automat & Operat, Tehran 1684613114, Iran
[3] Texas A&M Univ, Dept Sci & Math, Doha 23874, Qatar
来源
关键词
Brushless DC motor; Four-switch inverter; Sensorless control; Back-EMF voltage sensing; DSP;
D O I
10.1631/jzus.A0820097
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We propose a position sensorless control scheme for a four-switch, three-phase brushless DC motor drive, based on the zero crossing point detection of phase back-EMF voltages using newly defined error functions (EFs). The commutation instants are 30A degrees after detected zero crossing points of the EFs. Developed EFs have greater magnitude rather than phase or line voltages so that the sensorless control can work at a lower speed range. Moreover, EFs have smooth transitions around zero voltage level that reduces the commutation errors. EFs are derived from the filtered terminal voltages v (ao) and v (bo) of two low-pass filters, which are used to eliminate high frequency noises for calculation of the average terminal voltages. The feasibility of the proposed sensorless control is demonstrated by simulation and experimental results.
引用
收藏
页码:201 / 208
页数:8
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