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SVGEN.H与F28M35xPWM.H配合整流以及逆变结果不正常,寻解!

我用F28M35做三相PFC整流电路,在矢量控制模块SVGEN.H与波形输出模块F28M35xPWM.H配合输出的结果总是不正常,表现在PFC部分,最小升压为1.8倍,逆变状态输出波形峰值比应该输出峰值低1.8倍。

如果您使用过SVGEN.H这个程序做过电机控制或者整流控制,请指出我引用的两段程序在哪里出了问题?

参考SVGENDQ.H的使用说明,有一个系数是Udc/√3 ,但是不知道怎么使用√3这个系数,求解答!

 

 

TI提供的SVGEN.H的程序如下

//—————————————————————

//File name:       SVGEN.H 

#ifndef __SVGEN_H__

#define __SVGEN_H__

 

typedefstruct    {

_iq  Ualpha;          // Input: reference alpha-axis phase voltage

_iq  Ubeta;           // Input: reference beta-axis phase voltage

_iq  Ta;              // Output: reference phase-a switching function

_iq  Tb;              // Output: reference phase-b switching function

_iq  Tc;              // Output: reference phase-c switching function

_iq  tmp1;            // Variable: temp variable

_iq  tmp2;            // Variable: temp variable

_iq  tmp3;            // Variable: temp variable

Uint16 VecSector;     // Space vector sector

} SVGEN;  

            

#define SVGEN_DEFAULTS { 0,0,0,0,0 }                      

 

/*——————————————————————-

    Space Vector  Generator (SVGEN) Macro Definition

    v.tmp1 = Ubeta;

    v.tmp2 = Ubeta/2 + sqrt(3)/2*Ualpha

    v.tmp3 =-Ubeta/2 + sqrt(3)/2*Ualpha

———*/

 

 

#define SVGENDQ_MACRO(v)                                              v.tmp1= v.Ubeta;                                              

    v.tmp2= _IQdiv2(v.Ubeta) + (_IQmpy(_IQ(0.866),v.Ualpha));     

    v.tmp3= v.tmp2 – v.tmp1;                                       

    v.VecSector=3;                                                

    v.VecSector=(v.tmp2> 0)?( v.VecSector-1):v.VecSector;         

    v.VecSector=(v.tmp3> 0)?( v.VecSector-1):v.VecSector;         

    v.VecSector=(v.tmp1< 0)?(7-v.VecSector) :v.VecSector;         

   if(v.VecSector==1 || v.VecSector==4)                                        

    {   v.Ta= v.tmp2;                                                    

         v.Tb= v.tmp1-v.tmp3;                                            

         v.Tc=-v.tmp2;                                                  

    }                                                                \

   elseif(v.VecSector==2 || v.VecSector==5)                                   

    {   v.Ta= v.tmp3+v.tmp2;                                             

         v.Tb= v.tmp1;                                                   

         v.Tc=-v.tmp1;                                                  

    }                                                             

   else                                                                        \

    {   v.Ta= v.tmp3;                                                    

         v.Tb=-v.tmp3;                                                   

         v.Tc=-(v.tmp1+v.tmp2);                                     

    }                                                             

 #endif // __SVGEN_H__

 

//——————————————————————————–

  pwm脉冲输出程序参考F28335改写而成,

//File name  : F28M35xPWM.H                                        

 

#ifndef __F28M35X_PWM_H__

#define __F28M35X_PWM_H__

 

#include "f28M35xbmsk.h"

#include "f28M35xdrvlib.h"

 

#define PWM_INIT_STATE ( FREE_RUN_FLAG +         \

                         PRDLD_IMMEDIATE  +       \

                         TIMER_CNT_UPDN +         \

                         HSPCLKDIV_PRESCALE_X_1 + \

                         CLKDIV_PRESCALE_X_1  +   \

                         PHSDIR_CNT_UP    +       \

                         CNTLD_DISABLE )

 

/*———–Initialization constant for the F2833X Compare Control Register.   LOADAMODE_ZRO——-*/

#define CMPCTL_INIT_STATE ( LOADAMODE_PRD + \

                            LOADBMODE_PRD + \

                            SHDWAMODE_SHADOW + \

                            SHDWBMODE_SHADOW )

 

/*——————————————————————-Initialization constant for the F2833X Action Qualifier Output A Register.

——-*/

#define AQCTLA_INIT_STATE ( CAU_CLEAR + CAD_SET )

 

/*—————————————————————————-

Initialization constant for the F2833X Dead-Band Generator registers for PWM Generation.

Sets up the dead band for PWM and sets up dead band values.

—————————————————————————-*/

#define DBCTL_INIT_STATE  (BP_ENABLE + POLSEL_ACTIVE_HI_CMP)

 

#define DBCNT_INIT_STATE   200   // 200 counts = 2.5 usec (delay)  (for TBCLK = SYSCLK/1)

 

/*——————————————————————-

Initialization constant for the F2833X PWM Chopper Control register for PWM Generation.

——-*/

#define  PCCTL_INIT_STATE  CHPEN_DISABLE

 

/*——————————————————————-

Initialization constant for the F2833X Trip Zone Select Register

——-*/

#define  TZSEL_INIT_STATE  ENABLE_TZ1_OST             //DISABLE_TZSEL

             

/*——————————————————————-

Initialization constant for the F2833X Trip Zone Control Register

———————————————————————

#define  TZCTL_INIT_STATE ( TZA_HI_Z + TZB_HI_Z + \

                            DCAEVT1_HI_Z + DCAEVT2_HI_Z + \

                            DCBEVT1_HI_Z + DCBEVT2_HI_Z )

 

/*——————————————————————-

    Define the structure of the PWM Driver Object

——–*/

 

typedefstruct {

Uint16 PeriodMax;   // Parameter: PWM Half-Period in CPU clock cycles (Q0)

Uint16 HalfPerMax;   // Parameter: Half of PeriodMax (Q0)

Uint16 Deadband;    // Parameter: PWM deadband in CPU clock cycles (Q0)

_iq MfuncC1;        // Input: EPWM1 A&B Duty cycle ratio (Q24)

_iq MfuncC2;        // Input: EPWM2 A&B Duty cycle ratio (Q24)

_iq MfuncC3;        // Input: EPWM3 A&B Duty cycle ratio (Q24)

} PWMGEN ;

 

#define F28M35X_FC_PWM_GEN    { 3750, 

                                1875,                               

100, 

                                    0x4000,

                                    0x4000,

                                    0x4000,

                             }

 #define PWMGEN_DEFAULTS F28M35X_FC_PWM_GEN

 #define PWM_MACRO(ch1,ch2,ch3,v)                                  

(*ePWM[ch1]).CMPA.half.CMPA = _IQmpy(v.HalfPerMax,v.MfuncC1)+      v.HalfPerMax;    

(*ePWM[ch2]).CMPA.half.CMPA = _IQmpy(v.HalfPerMax,v.MfuncC2)+ v.HalfPerMax;     

(*ePWM[ch3]).CMPA.half.CMPA = _IQmpy(v.HalfPerMax,v.MfuncC3)+ v.HalfPerMax;     

 #endif 

 

逆变输出波形如下:

iparkI.Ds     = _IQ(1); 

iparkI.Qs     = _IQ(0);  

直流端输入50.1VDC,交流侧空载引出

 从结果可以看出,50.1VDC输入,17.9V线电压输出,相电压峰值为14.61VDC,远低于应该输出的比例28.76VDC.(28.76VDC的计算依据 50.1×310/540=28.76VDC)

              逆变输出波形为

 

jianqing wang:

#define PWM_MACRO(ch1,ch2,ch3,v)                                  

(*ePWM[ch1]).CMPA.half.CMPA = _IQmpy(v.HalfPerMax,v.MfuncC1)+      v.HalfPerMax;    

(*ePWM[ch2]).CMPA.half.CMPA = _IQmpy(v.HalfPerMax,v.MfuncC2)+ v.HalfPerMax;     

(*ePWM[ch3]).CMPA.half.CMPA = _IQmpy(v.HalfPerMax,v.MfuncC3)+ v.HalfPerMax;     

楼主能否解释一下解释一下这个PWM_MACRO(),谢谢!

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