针对传统虚拟注入法IPMSM的 MTPA控制策略,其在信号注入阶段复杂的坐标变换过程以及信号处理环节由于带通滤波器与低通滤波器级联带来动态响应慢的问题,提出一种改进型虚拟注入法IPMSM的 MTPA控制策略.首先,在虚拟信号注入过程直接将高频信号注入到采样滤波得到的id、iq中,简化复杂的开方运算过程;其次,根据改进后的虚拟信号注入方法推导新的 MTPA判据公式,对高频响应信号进行信号解调后依次通过低通滤波器和积分器得到最优电流矢量角;最后通过仿真以及搭建8.4 kW的内置式永磁同步电机实验平台验证改进型虚拟注入法的有效性.实验结果表明,改进型虚拟注入法能够有效简化计算,且在消除级联响应后仍具有强鲁棒性,加载实验速度超调仅且只有3 r/min(0.375%),动态响应时间提高约0.2 s.
MTPA control based on improved virtual injection method IPMSM
The MTPA control strategy of traditional virtual injection method IPMSM is proposed to solve the problem of slow dynamic response due to the complex coordinate transformation process and the cascade of band-pass filter and low-pass filter in signal processing.Firstly,in the virtual signal injection process,the high frequency signal is directly injected into the id and iq obtained by sampling and filtering,which simplifies the complex root operation process.Secondly,a new MTPA criterion formula is derived according to the improved virtual signal injection method.After demodulation of the high frequency response signal,the optimal current vector angle is obtained through the low-pass filter and integrator in turn.Finally,the effectiveness of the improved virtual injection method was verified by simulation and the 8.4 kW built-in PMSM experimental platform.The experimental results show that the improved virtual injection method can effectively simplify the calculation,and still has strong robustness after eliminating the cascade response.The loading experimental speed overshoot is only 3 r/min(0.375%),and the dynamic response time is improved by about 0.2 s.
NETL
NSTL
万方数据
