DRV10964: Suitability for a gimbal

HPB

Part Number: DRV10964
Other Parts Discussed in Thread: DRV10983, DRV10987

Hi,

would you recommend this driver (DRV10964) for a 2-axis camera gimbal? Specifically to be used with a 50kv or an 80kv motor.

over 5 years ago

0 Vishnu Balaraj over 5 years ago

TI__Mastermind 24415 points

Hi HPB,

Thanks for posting your question in MD forum. Please refer to the below table to quickly decide whether DRV10964 is a good fit for your motor.

Regards,

Vishnu

0 HPB over 5 years ago in reply to Vishnu Balaraj

Expert 1350 points

I've seen this chart. However, I was hoping to know if the driver works with low speed motors.

0 Vishnu Balaraj over 5 years ago in reply to HPB

TI__Mastermind 24415 points

The minimum operation duty cycle in DRV10964 is 10% which means, if the motor rated speed at 4V is say 5000 rpm, then the minimum speed that DRV10964 can drive will be 500 rpm at 10% duty cycle (0.4V).

The maximum input voltage that DRV10964 can support is 5.5V. Maximum No-load speed of an 80 kv motor at 5.5V will be 440 rpm. At 10% duty cycle, the speed will be 44 rpm which will be quite challenging for a low voltage sensorless device like DRV10964 to drive. What is the voltage rating of the motor? If it is in the range between 6.2V and 24V then you can try DRV10983 or DRV10987.

Regards,

Vishnu

0 HPB over 5 years ago in reply to Vishnu Balaraj

Expert 1350 points

That is helpful. Thank you. This is the motor I wish to use - https://www.ebay.com/itm/GForce-2208-80KV-Brushless-Gimbal-Motor-for-GoPro-Size-BGC-Brushless-Gimbal-/192141880553?_ul=IN

Looks like its a 6-14V motor. I had not noticed that before. Regarding the DRV10987, is it possible to change the motor direction while the motor is running? Or is the direction accounted for only on startup or reset conditions?

0 Vishnu Balaraj over 5 years ago in reply to HPB

TI__Mastermind 24415 points

Hi HPB,

Yes, it is possible to change the motor direction in DRV10987. Pin 14 (DIR) when low, drives in one direction (phase driving sequence is U → V → W) and when pulled high drives the motor in opposite direction (phase driving sequence is U → W → V).

Regards,

Vishnu

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DRV10964: Suitability for a gimbal