一种改进型永磁同步电主轴死区补偿算法  

Improved Dead-Time Compensation Algorithm of Permanent Magnet Synchronous Motor

作　　者：于家斌[1] 刘翠玲[1] 秦晓飞[2] 郑军[2] 

机构地区：[1]北京工商大学计算机与信息工程学院,北京100048 [2]中国科学院自动化研究所,北京100190

出　　处：《计算机仿真》2013年第10期271-274,共4页Computer Simulation

基　　金：十一五"高档数控机床与基础制造装备"科技重大专项-电主轴及驱动装置(2009ZX04010-023);北京市教委科研基地科技创新平台(PXM_2012_014213_000023)

摘　　要：针对永磁同步电主轴SVPWM逆变器死区效应所造成的输出电流波形严重畸变和零电流钳位现象,分析了因死区时间、功率器件导通关断时间引起的误差电压矢量,在传统电压前馈死区补偿算法的基础上,提出了一种改进型电压前馈死区补偿算法,无需对电流矢量角度进行实时计算进而判断其所在扇区进行补偿,而是利用电流环已经计算好的电流矢量幅值分量iα和iβ的线性组合实现对定子电压的补偿,算法计算量小、易于实现,同时避免了角度计算误差对死区补偿效果的影响。实验结果表明:改进算法可以有效地改善输出电流的波形,消除零电流钳位现象。In order to solve the problem that the SVPWM inverter of permanent magnet synchronous motor （PMSS） dead -time effect distorts the output current and causes the zero -current clamping phenomenon, error voh- age vector generated by the dead - time, power devices turn - on and turn - off time was analyzed, and an improved dead - time compensation algorithm was proposed based on the traditional voltage feed - forward dead - time compen- sation algorithm. The compensation of the stator voltage by the linear combination of i~ and is which have been calcu- lated in the current loop was adopted in the improved algorithm instead of real - time calculating the angle of the cur- rent vector and then judging their sector to compensate, so it has a small mount of computation and is easy to be im- plemented compared with the traditional algorithm, meanwhile the angle error affecting the dead - time compensation effect can be avoided. Experimental results show that the proposed dead -time compensation algorithm can improve the output current waveform and eliminate the zero -current clamping phenomenon.

关 键 词：永磁同步电主轴 死区效应 零电流钳位 电压前馈死区补偿 

分 类 号：TP276[自动化与计算机技术—检测技术与自动化装置]