Hi, I am student at SAKARYA university. I want to drive PMSM 3-phase motor. So I have STEVAL-IPMNG8Q.
I have STM32F407G discovery board and STEVAL-IPMNG8Q. I want to drive the PMSM motor with my code but I'm having problems.
I'm using six-step control with timer CH1-CH1N pwm.The code I wrote is below.
int pwmSin[] = {0,18,20,30,40,50,60,70,80,90,80,70,60,50,40,30,20,0,0,18,20,30,40,50,60,70,80,90,80,70,60,50,40,30,20,0,0,18,20,30,40,50,60,70,80,90,80,70};
void motor_control(void) {
///--------- A HIGH- B LOW ---------///
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_2);
///--------- A HIGH- C LOW ---------///
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_3);
///--------- B HIGH- C LOW ---------///
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_3);
///--------- B HIGH- A LOW ---------///
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_1);
///--------- C HIGH- A LOW ---------///
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_1);
///--------- C HIGH- B LOW ---------///
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_2);
}
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
for( i = 0; i<64;i++){
__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, pwmSin[i]);
__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_2, pwmSin[i]+16);
__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_3, pwmSin[i]+32);
motor_control();
if(i == 63){
i=0;
}
}
When I run this code the motor is locked. The motor could not move.
I know I need to generate a sine wave using pwm but something is wrong.
I was able to create a 120 degree angle difference between phases but I am getting a square wave output. I will be grateful if you could help me. I wish you good work.
