关于svpwm方面的一些疑问

只看该作者 · 2017-4-24 10:47

可不可以让他每隔一个定时周期将角度值加一作为他的角度，然后根据这个角度进行扇区判断，不用id iq来计算还有就是是不是svpwm随扇区的变化 pwm占空比也在不断地进行着调整小弟初次接触svpwm 有点困惑

只看该作者 · 2017-4-26 10:11

void SVPWM_CalcDutyCycle(s16 Va,s16 Vb)
{
signed short X,Y,Z,Tx,Ty;
unsigned short Ta,Tb,Tc;
signed short ua,ub,uc;
unsigned char A,B,C;
unsigned short Tcm1,Tcm2,Tcm3;
unsigned char Sector; //¿Õ¼äÊ¸Á¿ÉÈÇø
//unsigned short pot,adc,adc2;
//pot=(ADC_ConvertedValue[0]);
//adc=Udc;

//½«ÉÏÇÅ±Û×ªÎªÏÂÇÅ±Û±íÊ¾µÄ£¬ÉÈÇø·´180¡ã£¬TIM1µÄPWMÄ£Ê½ÒªÉèÖÃÎªPWM1¾ÍÐÐÁË
Va=-Va;Vb=-Vb;
X=SQRT3MUL1000*Vb/1000*TS/Udc;
Y=(3*Va+SQRT3MUL1000*Vb/1000)*TS/(2*Udc);
Z=(-3*Va+SQRT3MUL1000*Vb/1000)*TS/(2*Udc);
ua=Vb;ub=(SQRT3MUL1000*Va/1000-Vb)/2;uc=-(SQRT3MUL1000*Va/1000+Vb)/2;
A=(ua>0)?1:0;
B=(ub>0)?1:0;
C=(uc>0)?1:0;
Sector=A+2*B+4*C;//get the sector number */

switch (Sector)
{
   case 1:
      Tx=Z;Ty=Y;break;
   case 2:
      Tx=Y;Ty=-X;break;
   case 3:
      Tx=-Z;Ty=X;break;
   case 4:
      Tx=-X;Ty=Z;break;
   case 5:
      Tx=X;Ty=-Y;break;
   case 6:
      Tx=-Y;Ty=-Z;break;
}
Ta=(u16)((TS-Tx-Ty)/4);
Tb=(u16)(Ta+Tx/2);
Tc=(u16)(Tb+Ty/2);    //ÆäÖÐTc×î´ó£¬Ta×îÐ¡

switch(Sector)
{
   case 4:
      Sector=SECTOR_1;break;
   case 6:
      Sector=SECTOR_2;break;
   case 2:
      Sector=SECTOR_3;break;
   case 3:
      Sector=SECTOR_4;break;
   case 1:
      Sector=SECTOR_5;break;
   case 5:
      Sector=SECTOR_6;break;
}
/*************************************************/
switch (Sector)
{
   case SECTOR_1:
      Tcm1=Tc;Tcm2=Tb;Tcm3=Ta;
   break;
   case SECTOR_2:
      Tcm1=Tb;Tcm2=Tc;Tcm3=Ta;
   break;
   case SECTOR_3:
      Tcm1=Ta;Tcm2=Tc;Tcm3=Tb;
break;
   case SECTOR_4:
      Tcm1=Ta;Tcm2=Tb;Tcm3=Tc;
   break;
   case SECTOR_5:
      Tcm1=Tb;Tcm2=Ta;Tcm3=Tc;
   break;
   case SECTOR_6:
      Tcm1=Tc;Tcm2=Ta;Tcm3=Tb;
   break;
}

TIM1->CCR1=Tcm1;    //½«»º´æÖµÐ´½ø¼Ä´æÆ÷CCR
TIM1->CCR2=Tcm2;
TIM1->CCR3=Tcm3;
}

只看该作者 · 2019-8-5 09:51

这么好的贴子，竟然0回复

只看该作者 · 2020-3-22 22:34

zhouhuyin 发表于 2017-4-26 10:11
void SVPWM_CalcDutyCycle(s16 Va,s16 Vb)
{
signed short X,Y,Z,Tx,Ty;

你好，请问你这部分程序中为什么要对Va = -Va,Vb = -Vb呀。实际Ua,Ubeta不行么？以及下方的switch case中的进行赋值我不是很明白？