基于电压矢量注入的无刷直流电机换相转矩脉动抑制方法  

Method for Suppressing Commutation Torque Ripple of Brushless DC Motor Based on Voltage Vector Injection

作　　者：陆可[1] 蔡广瀚 向南辉 沈小东 LU Ke;CAI Guanghan;XIANG Nanhui;SHEN Xiaodong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,Sichuan Province,China)

机构地区：[1]西南交通大学电气工程学院,四川省成都市611756

出　　处：《中国电机工程学报》2021年第10期3592-3601,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52077183)。

摘　　要：为解决无刷直流电机换相期间的转矩脉动问题,在两相静止坐标系中对换相过程分析的基础上,提出一种在续流阶段注入特定电压矢量的转矩脉动抑制方法。首先,虚拟地分割电机相电压为两部分,并重构其作用范围:一部分仍然施加在绕组两端,进而产生假想的等效电流;另一部分则是用来"改变"反电势,即人为将其补偿为恰好使转矩不变的值。其次,利用特定电压矢量对转矩的不同影响,构建带有负反馈环节的注入矢量幅值调整策略,以保证较强的稳定性。该算法简化了分析过程,同时避免了复杂的占空比计算。仿真结果说明了理论分析的正确性;通过实验分别在高速与低速工况下验证了该方法对换相转矩脉动的抑制效果。In order to solve the problem of torque ripple during commutation of brushless DC motors,based on the analysis of the commutation process in a two-phase stationary coordinate system,a new method for suppressing torque ripple injected with a specific voltage vector in the freewheeling phase is proposed.Firstly,the motor phase voltage is virtually divided into two parts and the scope of its action is reconstructed:one part is still applied across the windings to generate an imaginary equivalent current;the other part is used to"change"the back electromotive force(EMF),which is artificially compensated for precisely keeping the torque constant.Secondly,using the different effects of specific voltage vectors on torque,an injection vector amplitude adjustment strategy with a negative feedback link is constructed to ensure strong stability.This algorithm simplifies the analysis process while avoiding complicated duty cycle calculations.The simulation results show the correctness of the theoretical analysis.The experimental results verify the effectiveness of the new method in suppressing commutation torque ripple under high and low speed conditions.

关 键 词：无刷直流电机 换相转矩脉动 电压矢量注入 

分 类 号：TM33[电气工程—电机]