Current Limit Strategy for BLDC Motor Drive With Minimized DC-Link Capacitor

被引：12

作者：

Wei, Yanyu ^{[1
]}

Xu, Yongxiang ^{[1
]}

Zou, Jibin ^{[1
]}

Li, Yong ^{[1
]}

机构：

[1] Harbin Inst Technol, Harbin 150001, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2015年 / 51卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Brushless dc motor (BLDCM); current limit strategy; minimized dc-link capacitor; pumping-up voltage; reversal dc-link current; PWM CONVERTERS;

D O I：

10.1109/TIA.2015.2427285

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Brushless dc motor drive system employing minimized dc-link capacitor is becoming popular for the reason of compactness and long lifetime. However, once the capacitance is reduced, reversal dc-link current will lead to excessive voltage rise in the dc link when conventional current limit strategy is used. In order to avoid the damage caused by oversize pumping-up voltage, a novel current limit strategy without reversal dc-link current is necessary. In this paper, the traditional all-turn-off current limit logic is replaced by half-turn-off logic. Then, an improved current sampling scheme is presented to replace the cycle-by-cycle mode, which induces failure of current limiting after the elimination of reversal current. Finally, the proposed strategy is verified by simulation and experiment.

引用

页码：3907 / 3913

页数：7

共 12 条

[1] Current control strategy for brushless DC motors based on a common DC signal [J].