Permanent magnet synchronous motor space vector control system

The invention relates to a space vector control system for a permanent magnet synchronous motor, which is characterized in that a rotating speed loop PI control part in the system adopts a superspiral sliding mode observer, and a motor rotor electrical angle observation value # imgabs0 # and a motor actual rotating speed omega r are calculated according to three-phase currents ia, ib and ic and three-phase voltages va, vb and vc of the motor, so that system buffeting can be effectively inhibited, the position estimation is more accurate, and the stability of the system is improved. The rotating speed error is smaller, and the performance of the observer is obviously improved. 本发明涉及一种永磁同步电机空间矢量控制系统，该系统中转速环PI控制部分采用超螺旋滑模观测器，根据电机三相电流ia，ib，ic和三相电压va、vb、vc计算得到的电机转子电角度观测值#imgabs0#和电机实际转速ωr，能有效抑制系统抖振，位置估计更加精确，转速误差更小，观测器性能有了明显的提高。