Choosing the right driver for a DD turntable

Holger Morgenstern

Other Parts Discussed in Thread: DRV10974, DRV10963, DRV10964, DRV10970

Question:

I need a BLDC Driver with following parameters:
Current: 12V
sensored or sensorless
sinusodial drive (!!!)
target rpm 33-78 (turntable)

Motor data:

Turns:110T

Poles and slots:36N42P

Wire:0.24mm

Ri(ohm):15.0ohm

Any suggestions?

over 4 years ago

0 Johnny Vallespir over 4 years ago

TI__Intellectual 1350 points

Hello Holger,

By "Current: 12V", do you mean: "Voltage: 12V"?

Also, to make a proper recommendation, we need to know the power of the motor. Could you please provide this information?

best,

Johnny

0 Holger Morgenstern over 4 years ago in reply to Johnny Vallespir

Prodigy 10 points

Sorry, didn´t see the answer because of Spam Filter.
I have a 12V Power source.
Motor Characteristic: Torque: 4970g @ 5V & 0.75A

Regards Holger

0 Matt Hein over 4 years ago in reply to Holger Morgenstern

TI__Mastermind 21805 points

Hi Holger,

I assume that the motor characteristic means you plan on driving the motor off of a 5V supply? Or does the motor run at 12V and 5V results from a 42% PWM duty cycle? If you can run your motor driver off of 12V that does open up more options for you.

You may want to check out DRV10974 (Sensorless) and DRV10970 (Sensored). They are both 12V capable but DRV10974 can also operate down to 4.4V. If you want the motor supply to be 5V, the best option is DRV10963 or DRV10964.

Thanks,

Matt

0 Holger Morgenstern over 4 years ago in reply to Matt Hein

Prodigy 10 points

As long the DD Motor is turning 33, 45 and 78rpm, isn't it better to use the sensored 10970 at 5V (Datasheet says it is okay)? Or doesn't it matter?

+1 Matt Hein over 4 years ago in reply to Holger Morgenstern

TI__Mastermind 21805 points

Hello Holger,

A sensored solution will work at any speed while a sensorless approach will not work at very low speeds due to a lack of back-EMF. However if the motor has a very high pole count the motor can still have a low mechanical RPM.

Please see this DRV10x selection FAQ for some more details: LINK

Thanks,

Matt

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Choosing the right driver for a DD turntable