五相永磁同步电机非正弦调制区谐波抑制策略
首发时间:2017-04-27
摘要:五相永磁同步电机转矩控制是在解耦后的基波空间中实现,此时谐波空间不产生电磁转矩却产生谐波电流,PWM调制策略需同时考虑基波空间和谐波空间。最近四矢量调制策略及其改进算法可以在基波电压调制输出的同时,保证谐波子空间电压为零,但该方法无法适用于高调制比时的非正弦调制区。为了减小高调制比时谐波电压和谐波电流,提出一种谐波最小四矢量调制算法。以原有四矢量方法为基础,构造两个合成基本矢量,在非正弦调制区,两个合成基本矢量幅值并不相同。根据目标矢量的不同实时计算两个基本矢量大小,以最大程度减小谐波空间伴生电压。最后通过仿真和实验了所提出方法的正确性和可行性。
For information in English, please click here
Harmonics Suppression Strategy in nonsinusoidal Modulation Region for Five-phase PMSM
Abstract:TFor five-phase PMSM, the toque is controlled in the decoupled base subspace, while the harmonic subspace that has nothing to do with the energy conversion but harmonic current. The voltages in basic and harmonic subspaces should be considered together in the modulation algorithm. With the modulation method of near four vectors, the voltage of basic subspace can be modulated with zero harmonic subspace voltage. But this method is not effective in the region with higher modulation ratio. A space vector pulse width modulation (SVPWM) algorithm VSI with the minimum harmonic based on near four voltage vectors was proposed. In the nonsinusoidal modulation region, the amplitude of two basic vectors is not same, which are composed of four near vectors. The two basic vectors are caculated according to the reference voltage, in order to minimize the induced voltage in the harmonic subspace. Simulation and experimental results verify the correctness and feasibility of the proposed algorithm.
Keywords: Five-phase PMSM SVPWM harmonics Suppression vector control
论文图表:
引用
No.4728209116044914****
同行评议
共计0人参与
勘误表
五相永磁同步电机非正弦调制区谐波抑制策略
评论
全部评论0/1000