matlab7.0搭建的三相全桥spwm控制的仿真模型，三相桥下端利用电阻对三相电流进行采样滤波，目的是观察电阻采样效果。-Simulation Model matlab7.0 built a three-phase full-bridge spwm controlled three-phase bridge resistance of the end use of three-phase current sampling filter, the purpose is to observe th