【摘要】 为了提高永磁同步电机直接转矩控制在高速加工中心、精密磨床等场合的控制性能,从零电压矢量的作用原理入手,深入的分析了永磁同步电机直接转矩控制系统中零电压矢量的作用以及转矩滞环比较器结构的改变对转矩波动的影响。与传统转矩滞环比较器相比,采用滞环宽度优化的转矩滞环比较器,通过合理添加零电压矢量,使转矩波动明显减小。利用Matlab仿真平台,证明了转矩滞环宽度相同时,系统速度越低转矩波动越小。在系统速度相同时,转矩滞环比较器滞环宽度越大转矩波动越小。更多还原

【Abstract】 In order to improve the performance of permanent magnet synchronous motor direct torque control such as high speed machining center and precision grinder,from the principle of zero voltage vector function,it analyzes the role of zero voltage vector in the Permanent magnet synchronous motor control system and the impact on Torque hysteresis comparator structure of rotating torque fluctuations deeply. Compared w ith the traditional torque hysteresis comparator,the hysteresis w idth optimized torque hysteresis comparator reduces torque ripple obviously,by adding zero voltage vectors reasonably. Using the Matlab simulation platform,it proves that under the condition of the same w idth of hysteresis the smaller the system speeds the smaller the torque ripples,and under the condition of the same system speed the greater the hysteresis w idth, the smaller the torque ripple.更多还原