直接转矩控制系统中减小转矩脉动方案比较_张爱玲.pdfVIP

12 5 V o l112 N o15 2008 9 ELE CT R IC M A CH IN E S A N D CONT RO L Sep. 2008 张爱玲, 王震宇, 杨文杰 ( , 0 30024) : 采用离散空间矢量调制( DSVM ) 和转矩预测技术减小感应电机直接转矩控制系统( DTC ) 低速时 转矩脉动, 为了系统实现时编程简单, 对 DSVM 开关表进行了优化, 将每 个采样周期分 为 3 个相等 时间段, 每 个时间段中作用一个电压矢量, 采用单一非零电压矢量与零电压矢量 组 合来代替非零电压矢量与非零电压矢量 组合, 简化了开关表, 降低了开关频率, 保证了低速时 带载能力在此基础上将D SVM 与转矩预测进行了实验对比实验结果表明: 与转矩预测相比, 开关表优化后 DSVM 在减小低速时 转矩脉动, 改善电流和磁链波形方面取得了更好 控制效 果, 且保持了转矩动态响应快 优点 : 感应电机 直接转矩控制 转矩预测 离散空间矢量调制 : TM 301. 2 : A : 1007- 449X ( 2008) 05- 0566- 05 Comparison between two kinds of reducing torque ripple of based on direct torque control ZHANG A i- ling, WANG Zh en-yu, YANG W en-j ie ( E lectr ica l Pow er Eng ineer ing Co llege, T a iyuan U n ive rsity o f T echno logy, T a iyuan 0 30024, Ch ina) Abstract: The stu dy of reduc ing torque ripp le of indu ction mo tor d irect to rqu e contro l ( DTC ) in the low- sp eed w as conducted by u sing discrete space vector modulation ( DSVM ) and torqu e pred ict ion techno logy, and sw itching tab le of DSVM h as been optmi ized. Each sam pling period w as divided into three equ al tmi e intervals, and a vo ltage vectorw as applied at each interva,l th at is, a sing le non- zero vo ltage vector and ze- ro-voltage vector replaced the comb ination of non-zero vo ltage vector and non- zero vo ltage vector, which smi p lified the sw itch tab le,