TIDA-010257: Can you tell me the setting values for the PWM frequency and the ADC sampling frequency for the current on this evaluation board?

Yukio Oyama

Part Number: TIDA-010257

Tool/software:

Hi all,

I am considering the PWM frequency and the ADC data sampling frequency in the current loop of the PFC.

I would like to know what the set values are for this board. Thank you.

YUKIOOYAMA

0 Hely Zhang 3 months ago

Hi, Oyama san

both are 40kHz.

see blow setting:

#define VIENNA_PFC3PH_PWM_SWITCHING_FREQUENCY_HZ ((float32_t)40*1000)

#define VIENNA_CNTRL_ISR_FREQ_RATIO 1

Regards

Hely

0 Yukio Oyama 3 months ago in reply to Hely Zhang

Hello, Zhang-san.

The sampling freq. of the ADC is defined by "VIENNA_CNTRL_ISR_FREQ_RATIO," right?

And does it represent a ratio with respect to PWM freq?

Best Regards,

YUKIOOYAMA

+1 Hely Zhang 3 months ago in reply to Yukio Oyama

Hi, Oyama san

you are right.

VIENNA_CNTRL_ISR_FREQ_RATIO controls both ADC sampling frequency and current control loop frequency.

and yes, it represents a ratio with respect to PWM freq.

Regards

Hely

0 Yukio Oyama 3 months ago in reply to Hely Zhang

Hello, Hely-san

I have understood the frequency setting, thank you. I appreciate your explanation.

I will close this case.

BR.

YUKIOOYAMA

Simulation, hardware & system design tools forum