关于单相全桥逆变高级定时器PWM输出程序有地方不明白。

xhnishiwo

定时器1的OC1和OC1N互补，OC2和OC2N互补，N5和N8是一组，N6和N7是组分别控制正负电压的导通，
可是接下来很多人写H桥的程序看不太懂。
如下例子，为什么OC2设置的输出极性和OC1一样都是High呢？这样左半桥不就和右半桥输出一样了吗，OC1=1,OC1N=0;
同时OC2=1,OC2N=0;这样怎么能产生逆变呢，是不应该把定时器通道2的输出极性设置成与1相反或者模式改成PWM2模式才行的通吗？
例：
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
  TIM_OCInitStructure.TIM_Pulse = ((Fsys / Fpwm) * 50) / 100;
  TIM_OC1Init(TIM1,&TIM_OCInitStructure);
       
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
  TIM_OCInitStructure.TIM_Pulse = ((Fsys / Fpwm) * 50) / 100;
  TIM_OC2Init(TIM1,&TIM_OCInitStructure);
       

正点原子

帮顶

loudianxin

可以参考这一个。用的DMA传送sin数组改变占空比  http://www.cirmall.com/circuit/1 ... 0%EF%BC%89#/details

Time_Zero

帮顶