摘要
双Y移30°永磁同步电机是一个强耦合的六维系统。为了实现转矩的解耦控制,将该系统经解耦坐标变换,建立在三个两两正交的子平面上,通过空间矢量PWM技术对转矩和定子谐波电流进行统一控制。本文针对该种空间矢量PWM技术,详细研究了连续调制模式和不连续调制模式下的零矢量的选择依据及其分配情况。仿真结果显示,连续调制模式能取得更小的转矩波动,而不连续调制模式能在大幅度减少开关次数的同时,取得比连续调制策略更少的定子电流谐波含量。
A dual Y shift 30 degree permanent magnet synchronous motor （PMSM） is basically a strong coupledsixdimensional system. In order to simplify the control of the motor, vector space decomposition transformation is used to map the motor vectors into three twodimensional orthogonal subplanes, then space vector PWM technique can be used to control the torque and stator harmonic current at the same time. On the basis of this PWM tech nique, a detailed study of the selection and distribution of zero vectors in continuous modulation and discontinuous modulation is presented in this paper. The simulation results show that a smaller torque ripple can be received by u sing the continuous modulation, while the number of switching times can be significantly reduced and less stator current harmonic content can be received by using the discontinuous modulation.
出处
《电工电能新技术》
CSCD
北大核心
2013年第4期31-34,54,共5页
Advanced Technology of Electrical Engineering and Energy
基金
浙江省自然科学基金资助项目(LY12E07002)
