Virtual Third Harmonic Back-EMF Based Sensorless Drive for High Speed BLDC Motors Considering Machine Parameter Asymmetries

被引：0
|
作者：
Yang, Lei [1 ]
Zhu, Z. Q. [1 ]
Bin, Hong [2 ]
Zhang, Zhuya [2 ]
机构：
[1] Univ Sheffield, Dept Elect & Elect Engn, Sheffield, S Yorkshire, England
[2] Midea Grp Corp Res Ctr, Motor & Drives Ctr, Shanghai, Peoples R China
来源：
2019 IEEE INTERNATIONAL ELECTRIC MACHINES & DRIVES CONFERENCE (IEMDC) | 2019年
关键词：
Asymmetric parameters; brushless DC motor; high speed; sensorless control; unbalanced parameters;
D O I：
暂无
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：
This paper investigates the virtual third harmonic back EMF based sensorless drive method for high speed brushless DC (BLDC) motors. Compared to conventional methods, no hardware low-pass-filters (LPFs) or comparators are used, and the undesired phase lag is avoided. In addition, the influence of asymmetric resistance and inductance parameters on sensorless commutation is analyzed in depth. With asymmetric parameters, zero crossing points (ZCPs) of virtual third harmonic will deviate from their ideal positions. Consequently, the commutation events, which are searched based on ZCPs, will also be triggered at inaccurate positions and then the control performance will be deteriorated. In order to suppress this negative influence, a phase compensation method is proposed. All the theoretical analyses are validated by experiments.
引用
收藏
页码：406 / 411
页数：6
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