Unbalanced ZCP Compensation Method for Position Sensorless BLDC Motor

被引：47

作者：

Park, Joon Sung ^{[1
]}

Lee, Ki-Doek ^{[1
]}

Lee, Sung Gu ^{[2
]}

Kim, Won-Ho ^{[3
]}

机构：

[1] Korea Elect Technol Inst, Intelligent Mech Res Ctr, Bucheon 14502, South Korea

[2] Busan Univ Foreign Studies, Dept Elect Robot Engn, Busan 46234, South Korea

[3] Gachon Univ, Dept Energy IT, Seongnam 13120, South Korea

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2019年 / 34卷 / 04期

关键词：

Back electromotive force (back EMF); brushless dc (BLDC) motor; dc-link voltage drop; offset voltage; position sensorless operation; zero-crossing point (ZCP) detection; DRIVE;

D O I：

10.1109/TPEL.2018.2868828

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 letter presents a position sensorless control method of brushless dc (BLDC) motors considering unbalanced zero-crossing detection of back electromotive force (back EMF). The zero-crossing point (ZCP) of back EMF voltage is detected by comparing the dc-link voltage with the back EMF voltage. The unbalanced ZCP detection is caused by the dc-link voltage drop, dc-link offset voltage, and amotor having asymmetric back EMFs. Because the sensorlessBLDCmotor control is based on unbalanced ZCP detection, issues with torque ripple and current ripplemay be increased. Therefore, sensorless operation with unbalanced ZCP detection may be unstable. In this study, an improved sensorless control method based on a simple compensation algorithm using ZCP signals is proposed. Using the proposed control method, balanced commutation instants can be obtained and the benefits of high-performance operation of BLDC motors can be accomplished. Through application of the proposed method, the effectiveness of the proposed method was experimentally verified.

引用

页码：3020 / 3024

页数：5

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