论文部分内容阅读
为了拓宽多相交流传动系统的调速范围，在多相系统变换理论和多相电机矢量控制的基础上，提出了一种基于指数响应的多相感应电机电子变极调速方法。该方法通过转子磁场定向矢量控制产生不同极对数的谐波电流来驱动电机旋转，不同极对数的转矩电流按照指数曲线进行切换，从而控制电机实现了在不停电情况下的电子变极，解决了变极过程中转矩和速度波动大的问题。该文以五相感应电机为例，对提出的变极方法进行实验验证，给出了其在转子磁场定向矢量控制下的1对极和2对极之间相互电子变极的实验结果，实验结果表明所提出的方法能够在不停电的情况下实现平滑的电子变极调速，使转矩和转速波动减弱。“,”In order to extend the range of a constant-power speed regulation of the AC drive system, the exponent response pole-changing method of multiphase induction motor (IM) is proposed. Different plane harmonic currents generated by the rotor field oriented vector control (RFOVC) can make motor rotate smoothly without poweroff to realize electronic pole-changing (EPC). The proposed method is verified by an EPC experiment of a 5-phase induction machine (IM) and the experimental results of EPC between 1-pair poles and 2-pair poles based on RFOVC are given. The experimental results show that the method proposed is feasible to achieve smooth pole-changing without poweroff by reducing torque and speed fluctuations.