pmsm可以开环驱动吗，程序如下，在该程序下，开环抖动，...

只看该作者 · 2016-4-14 22:41

//###########################################################################
//TITLE:
//
//###########################################################################
//  版本 | 年月日       | Description of changes
// =====|=============|====== |===============================================
//  1.0 | 2012  09  18 |    | test
//###########################################################################
#include "DSP2833x_Device.h"
#include "DSP2833x_Examples.h"
#include "stdio.h"
#include "stdlib.h"
#include "math.h"
#include "float.h"

#define PI 3.1415926
#define PERIODIC 3750
#define N  200          //开环测试设定细分
#define delta  2* PI/N //每步角度
#define baserpm 500

interrupt void epwm1_isr(void)
{
  GpioDataRegs.GPBDAT.bit.GPIO39 = 1;


encoder();
Adconv();
clark();                                           //clark变换-----------A,B,C->αβ
park();                                           //park变换------------αβ->dq

//-----------开环测试-------------------------------------------------------
   Ualpha=Kp* cos(i* delta);  //w=2*PI*F
   Ubeta =Kp* sin(i* delta);
   i++;
   if(i>=N){i=1;}

   svpwm();

GpioDataRegs.GPBDAT.bit.GPIO39 = 0;

EPwm1Regs.ETCLR.bit.INT = 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;
}

void svpwm(void)
{
//float Va,Vb,Vc,t1,t2,Ta,Tb,Tc;
//int sector=0;

//-----------clark逆变换---------------------------------αβ->a,b,c 扇区判断
Va=Ubeta;
Vb=(-0.5)* Ubeta+0.8660254* Ualpha;
Vc=(-0.5)* Ubeta-0.8660254* Ualpha;
sector=0;
if(Va>0){sector=1;}
if(Vb>0){sector=sector+2;}
if(Vc>0){sector=sector+4;}

//------------------------X,Y,Z(Va,Vb,Vc),计算导通时间----------------------------
Va=Ubeta;
Vb=(0.5)* Ubeta+0.8660254* Ualpha;
Vc=(0.5)* Ubeta-0.8660254* Ualpha;

  if(sector==3)    //扇区1 100
{
t1=-Vc;
t2=Va;

Ta=0.25* (1-t1-t2);
Tb=Ta+ 0.5* t1;
Tc=Tb+ 0.5* t2;
}
else if(sector==1)//扇区2 110
{
t1=Vc;
t2=Vb;

Tb=0.25* (1-t1-t2);
Ta=Tb+ 0.5* t1;
Tc=Ta+ 0.5* t2;
}
else if(sector==5)//扇区3 010
{
t1=Va;
t2=-Vb;

Tb=0.25* (1-t1-t2);
Tc=Tb+ 0.5* t1;
Ta=Tc+ 0.5* t2;
}
else if(sector==4)//扇区4 011
{
t1=-Va;
t2=Vc;

Tc=0.25* (1-t1-t2);
Tb=Tc+ 0.5* t1;
Ta=Tb+ 0.5* t2;
}
else if(sector==6)//扇区5 001
{
t1=-Vb;
t2=-Vc;

Tc=0.25* (1-t1-t2);
Ta=Tc+ 0.5* t1;
Tb=Ta+ 0.5* t2;
}
else if(sector==2)//扇区6 101
{
t1=Vb;
t2=-Va;

Ta=0.25* (1-t1-t2);
Tc=Ta+ 0.5* t1;
Tb=Tc+ 0.5* t2;
}
else             //扇区0,扇区7
{
Ta=0.5;
Tb=0.5;
Tc=0.5;
}

tmr1=Ta* PERIODIC;
tmr2=Tb* PERIODIC;
tmr3=Tc* PERIODIC;

EPwm1Regs.CMPA.half.CMPA = tmr1;
EPwm2Regs.CMPA.half.CMPA = tmr2;
EPwm3Regs.CMPA.half.CMPA = tmr3;

}

//--------------------------------------循环
void alldeal(void)
{

for(;;)
int800=0x0;
}
//***************************end***********************************
//===========================================================================
// No more.
//===========================================================================

只看该作者 · 2016-4-14 22:43

//-----------开环测试-------------------------------------------------------
   Ualpha=Kp* cos(i* delta);  //w=2*PI*F
   Ubeta =Kp* sin(i* delta);
   i++;
   if(i>=N){i=1;}
这是开环给定，用的是ti的28335

开环就是不带任何闭环，也没有编码器角度，相当于无传感器