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Original question:

DRV8316: MCF8316 min speed

MCF8316AEVM: Low speed range

Chris Sommerhalter
Prodigy 10 points
Part Number: MCF8316AEVM
Other Parts Discussed in Thread: MCT8316A

Tool/software:

I am currently evaluating the MCF8316 with the eval board MCF8316AEVM.

I’m having a problem with the speed range I need to target.

I need to drive my motor from 35 to 3000 RPM. 

But at low speed it is really complicated to spin the motor with the FOC algorithm.

Can you help me please configure this board to drive the motor at full speed range ?

My motor has 5 pairs poles and no sensor included.

8 Apk and 3Arms.

  • 0
    TI__Expert 6011 points

    Hi Chris, 

    I am afraid we are running into the limitations of the FOC algorithm here, basically the BEMF at the lowest speed (in your case is around 3Hz) is very small for the device to estimate the position. Any chance you can use our trapezoidal control algorithm - the MCT8316A?

    Thanks and regards,

    Sachin S