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DRV10983-Q1: Question for DRV10983-Q1 to drive square wave BLDC motors

Part Number: DRV10983-Q1
Other Parts Discussed in Thread: DRV10983, , MCT8316A

Hi Team,

Customer has one below square wave BLDC motor and wants to check if we can use DRV10983 sine wave method to drive, can you help to confirm it or not?

Motor's spec is as below:

  • Hello Jacky,

    Thanks for the info. I have never heard of square wave BLDC motors before, typically it is trapezoidal or sinusoidal. You are always free to use either one to drive your motor the only downside may come that you are not driving your motor in the most ideal way possible. So, this could prevent you from achieving the peak performance in your system. This would be in the case for example if you are using a sinusoidal motor but driving it using a trapezoidal control algorithm. The motor would still move but you might not reach the highest rated RPM of the motor or other parameters.

    Looking at other parameters the DRV10983-Q1 should work fine. On another note this device operates using sensorless control but I do see that the customer will have an onboard encoder in their system do they not plan to use it or are they specifically asking for sensorless operation?

    Best,

    Isaac

  • Hi Isaac,

    Thanks for the reply, and sorry for my confusion on the statement. There is no external onboard encoder in customer's system. There is encoder with motor is only for position detection, not for motor spin. From the motor's spec, it is recommended to use trapezoidal control algorithm to drive, but our DRV10983 is sensorless sinusoidal mothod, so customer wants to know if our DRV10983 can drive this motor well to the best performance.

    Thanks.

  • Hey Jacky,

    Thanks for the clarification. As I mentioned since the motor recommends to use trapezoidal control the customer will most likely not be able to obtain the best peak performance from using the DRV10983 since it is sinusoidal control. The motor will still spin but it might be worth it for the customer to test the motor out using the EVM and see if the performance is good enough for their system.

    I would also suggest looking at MCT8316A, this device is does sensorless trapezoidal control and has integrated FETs and uses 1xPWM or analog input which are all features found in the DRV10983 except the control method is trapezoidal. I think this device will able to achieve peak performance from the motor mentioned above.

    Best,

    Isaac

  • Hi Jacky,

    Any help needed or can we close this thread?

    Thanks,
    Aaron

  • Hi Aaron,

    No further help needed, thanks.

  • Thank you Jacky,

    I will close this thread!

    Best,

    Isaac