Difference between Brushless DC permanent magnet motor and Conventional motor:

The difference between Brushless DC permanent magnet motor and Conventional motor is given below

1. In the same frame, for same cooling, the brushless PM motor will have better efficiency and P. F and greater output power.

2. Power electronic converter required is similar in topology to the PWM inverters used in induction motor drives.

3. Conventional DC machines has field windings. But Brushless DC permanent magnet motor has no field windings.

4. Conventional DC machines are having mechanical commutator where Brushless DC permanent magnet motor has electronic commutator (Made up of power electronic switches).

5. BLPM DC machines has rotor position sensors.

6. Field can not be controlled in Brushless DC permanent magnet motor.

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