CCS/DRV8350H-EVM: pwm mode

abderrahim jamaoui

Prodigy 200 points

Part Number: DRV8350H-EVM

Tool/software: Code Composer Studio

hello,

what is the difference between 1x PWM mod and 3x PWM mode?

over 5 years ago

0 Adam Sidelsky over 5 years ago

TI__Guru 65460 points

Abderrahim,

Thanks for posting on the MD forum!

1XPWM mode means you are providing only 1 PWM input to the DRV and the hall sensors must be connected to the DRV for commutation control and sequencing.

3XPWM mode means you will provide three PWM signals (All three High Side inputs, INHx) and the low side signals will be automatically complementary inside the device. No halls are needed.

Regards,

-Adam

0 abderrahim jamaoui over 5 years ago in reply to Adam Sidelsky

Prodigy 200 points

Thanks, I understood but why the 3xPWM mode is mainly intended for sinusoidal control (of FOC control) and the 1xPWM mode is intended for trapezoidal control.

best regards.

0 Adam Sidelsky over 5 years ago in reply to abderrahim jamaoui

TI__Guru 65460 points

Abderrahim,

1x PWM is designed for hall input and uses the internal trapezoidal commutation.

3x can be used for any purpose in cases where the system doesn't have many PWM ports availble.

Regards,

-Adam

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CCS/DRV8350H-EVM: pwm mode