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Using BLDC motor with scalar control algorithm

Hello!

I need to study Scalar (V/f) Control of 3-Phase Induction Motors. I would like to test my firmware on a hardware. But I haven't 3 phase induction motor. Can I use for test this algoriths BLDC motor? Or this is different types of motors, need to different algorithms?

Regards

  • Hello Sasha,

    Induction Motors are very similar to BLDC motors, the difference is in the rotor. IM has a squirrel cage rotor while BLDCs rotors are construct with permanent magnets. This may or may not be relevant to what you are studying. This white paper explains some of the differences www.ti.com/.../slyy083.pdf
    I hope this helps.

  • Hi Sasha,

    Stator winding are similar in both the motors BLDC (synchronous motor) and IM (Asynchronous motor).

    In induction motor, rotor always tries to catch rotating magnetic field. Therefore it runs at a speed which is less than the synchronous speed. But in BLDC motor, rotor rotates at synchronous speed.

    Yes you can test, open loop V/F control algorithm on BLDC motor. To test this, you start your motor with lower speed and ramp slowly. Motor may not run if you apply higher speed (duty) at starting.