SVPWM Variante für FOC PMSM

static inline void Inverse_Clarke_Transformation(void)    //adopted invers clark from microchip AN1078 or TI

{

  Vr_a = U_alpha;                                

  Vr_b = -(U_alpha >> 1) + dsp32_op_mul(_1Q31_SQR3_DIV2, (U_beta));            

  Vr_c = -(U_alpha >> 1) - dsp32_op_mul(_1Q31_SQR3_DIV2, (U_beta));              

}

static inline void Calc_SVPWM(void)

{

  S32 Voff;

  S32 V_Min; 

  S32 V_Max;

  V_Min = min3(Vr_a, Vr_b, Vr_c);

  V_Max = max3(Vr_a, Vr_b, Vr_c);

  Voff = (V_Min + V_Max) >> 1;

  //Generate SVPWMs Vectors 

   Vr_a = (Vr_a - Voff);

   Vr_b = (Vr_b - Voff);

   Vr_c = (Vr_c - Voff);

}    //eof Calc_SVPWM

static inline void Generate_PWM_Duties(void)

{

  S64 DutyA, DutyB, DutyC;

  ////transform (-2048 .....0.....+2047)* ADC_SCALE  to (1600....800....0)

  //PWM A

  //PWM = -((i_out - 2048*ADC_SCALE) * 1600/2/2^25))

  DutyA = -(Vr_a - FULLSCALE_S25);    

  DutyA *= default_duty_var;

  Pwm_duty_a = (U32)(DutyA >> 25);

  //PWM B

  //PWM = -((i_out - 2048*ADC_SCALE) * 1600/2/2^25))

  DutyB =  -(Vr_b - FULLSCALE_S25);    

  DutyB *= default_duty_var;

  Pwm_duty_b = (U32)(DutyB >> 25);

  //PWM C

  //PWM = -((i_out - 2048*ADC_SCALE) * 1600/2/2^25))

  DutyC =  -(Vr_c - FULLSCALE_S25);      

  DutyC *= default_duty_var;

  Pwm_duty_c = (U32)(DutyC >> 25);

  //write in registers

  AVR32_PWM.channel[PWM_A_PWM_CHANNEL].cdtyupd = Pwm_duty_a;

  AVR32_PWM.channel[PWM_B_PWM_CHANNEL].cdtyupd = Pwm_duty_b;

  AVR32_PWM.channel[PWM_C_PWM_CHANNEL].cdtyupd = Pwm_duty_c;

  //unlock to trigger update next periode

  AVR32_PWM.SCUC.updulock = 1;

}  //eof static inline void Generate_PWM_Duties(void)