How to start motor using FOC from zero speed?

[Alex Chen]

Hi all,

I am using STM32F303RB with iHM08M1 to control a BLDC motor.

I want to startup my motor from zero speed using FOC, but the motor shakes at the beginning.

I have tried to increase Vq, but the motor will have a big vibration if Vq is set to high, but if I set it smaller the motor shakes.

Does someone can share how to startup a motor from zero speed using FOC? Or please give me some hints?

Thank you.

Alex

[Alex Chen]

Hi Steven,

Thanks for the reply.

Yes, We have run the motor profiler to get the motor parameters and we use hall sensors.

Because the motor runs very smoothly without any shaking after the motor gets some speed (after leaving the still state),

so we think the order of the hall sensors should be correct.

Thank you.