motor ware 例程 pwm输出函数怎么理解？

user5947112

static inline void HAL_writePwmData(HAL_Handle handle,HAL_PwmData_t *pPwmData)
{
uint_least8_t cnt;
HAL_Obj *obj = (HAL_Obj *)handle;
PWM_Obj *pwm;
_iq period;
_iq pwmData_neg;
_iq pwmData_sat;
_iq pwmData_sat_dc;
_iq value;
uint16_t value_sat;

for(cnt=0;cnt<3;cnt++)
    {
      pwm = (PWM_Obj *)obj->pwmHandle[cnt];
      period = (_iq)pwm->TBPRD;
      pwmData_neg = _IQmpy(pPwmData->Tabc.value[cnt],_IQ(-1.0));
      pwmData_sat = _IQsat(pwmData_neg,_IQ(0.5),_IQ(-0.5));    //_IQsat(A, long P, long N)//IQ数值的限幅函数把A限制到[N P]之间
      pwmData_sat_dc = pwmData_sat + _IQ(0.5);
      value = _IQmpy(pwmData_sat_dc, period);
      value_sat = (uint16_t)_IQsat(value, period, _IQ(0.0));

      // write the PWM data
      PWM_write_CmpA(obj->pwmHandle[cnt],value_sat);
    }

return;
} // end of HAL_writePwmData() function

pPwmData->Tabc.value[cnt]是由三项电压标幺值减去最大最小电压标幺值和的一半而得出的，作为PWM占空比来使用，但是电压标幺值是由实际电压除上USER_IQ_FULL_SCALE_VOLTAGE_V得到的，而占空比直接相关的是母线电压，如果母线电压与USER_IQ_FULL_SCALE_VOLTAGE_V相等，则比较容易理解。母线电压比USER_IQ_FULL_SCALE_VOLTAGE_V要小很多，所以直接把电压标幺值作为占空比，不会导致输出电压要小于实际所需电压吗？希望大神帮忙解答，谢谢

6 年多前