DRV8304: Acceleration & Deceleration control with 1x pwm mode

Junho Oh

Part Number: DRV8304

Hello forum,

I’m trying to use DRV8304 for controlling BLDC motor.

and I’m thinking to use synchronous 1x PWM mode as a configuration.

what I want to know is that how to control BLDC motor including acceleration and deceleration. Is it enough to control PWM duty change for acceleration and deceleration?

I mean if I increase or decrease duty length for a certain amount of time, BLDC can be accelerated or decelerated?

If there is a recommended way to control speed with acceleration and deceleration, please give me any tip.

thanks in advance!

over 1 year ago

0 Anthony Lodi over 1 year ago

TI__Mastermind 22551 points

Hi Junho,

Thanks for your question! Our team will look into this and aim to provide a response by the end of the week.

Regards,

Anthony Lodi

0 Junho Oh over 1 year ago in reply to Anthony Lodi

Prodigy 20 points

Thanks, and I need to mention one more thing.

In my current concept, hall sensor is not read by MCU which gives PWM input to DRV8304.

And MCU changes the duty of PWM in acceleration and deceleration as below.

Gives 10% duty of pulses 10 times.
Gives 15% duty of pulses 10 times.
. . .
Gives 40% duty of pulses 10 times

0 Joshua Horlander Cruz over 1 year ago

TI__Genius 16040 points

Hi Junho,

Could you provide your schematic?

Thank you,

Joshua

0 Andrew Liu over 1 year ago in reply to Junho Oh

TI__Mastermind 18916 points

Hi Junho,

Do you require additional assistance here?

Please let us know if there are any lingering requests pertaining to this topic - or if we can close the thread.

Best Regards,
Andrew

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DRV8304: Acceleration & Deceleration control with 1x pwm mode