CCS: N2HET can not output pwm?

feng yang66

Tool/software: Code Composer Studio

dear all:

hetmax value is 2000. When the maximum is greater than 1990, Pwm can not output？？？

#define hetmax 1982
U=hetmax * SinTab1024[MotorAngle]>>14;
V=hetmax * SinTab1024[(MotorAngle+341)&0x3FF]>>14;
W=hetmax * SinTab1024[(MotorAngle-341)&0x3FF]>>14;

U= (U+2000)/2;
V= (V+2000)/2;
W= (W+2000)/2;
hetRAM1->Instruction[pHET_BUFDCA_0 + 0].Data = U;
hetRAM1->Instruction[pHET_BUFDCA_0 + 1].Data = V;
hetRAM1->Instruction[pHET_BUFDCA_0 + 2].Data = W;

1488.DRV3205_N2HET.rar

over 7 years ago

0 QJ Wang over 7 years ago

TI__Guru**** 196736 points

Hello Feng,

What are the values of U,V,W programmed to Add.data fields?

0 feng yang66 over 7 years ago in reply to QJ Wang

Prodigy 115 points

Hello QJ:
the values of U,V,W is The three-phase duty ratio of permanent magnet synchronous motor. Three positive sin waveform of 120 degrees.

Today we're going to try another example：

#define hetmax 1992
U=hetmax ;
V=hetmax ;
W=hetmax;
hetRAM1->Instruction[pHET_BUFDCA_0 + 0].Data = U;
hetRAM1->Instruction[pHET_BUFDCA_0 + 1].Data = V;
hetRAM1->Instruction[pHET_BUFDCA_0 + 2].Data = W;
PWM waveform cannot be issued.

0 QJ Wang over 7 years ago in reply to feng yang66

TI__Guru**** 196736 points

Hello Yang,

Have you solved the problem to get the PWM output?

Arm-based microcontrollers

Arm-based microcontrollers forum

CCS: N2HET can not output pwm?