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28379D

在测试SVPWM波输出时,初始化时通过TZ模块强制输出高电平

EPwm1Regs.TZCTL.bit.TZA = 1; //强制ePWMA为高电平 
EPwm1Regs.TZCTL.bit.TZB = 1; //强制ePWMB为高电平
EPwm2Regs.TZCTL.bit.TZA = 1;
EPwm2Regs.TZCTL.bit.TZB = 1;
EPwm3Regs.TZCTL.bit.TZA = 1;
EPwm3Regs.TZCTL.bit.TZB = 1;

但是在点击CCS运行按钮的瞬间PWMA 与PWMB通道会同时出现2ms的低电平,在实际中这是禁止出现的,因为采用的光耦是低电平有效的,同时输出低电平会使上下桥臂直通烧坏IGBT,有没有什么办法解决点击运行按钮瞬间出现低电平这个现象?

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