I develop a current control application but I can't decide between a brushed or a brushless motor. I'm afraid that brushless motor drive will be more complicated and less efficient. I'm planning to make the driver/controller using a PIC and the appropriate driving circuit. Can anyone help me choose?

 

Brushless motor drive is more complicated (electronic commutation reuqired) and more efficient. There is no brush (commutator) to wear out and introduce contamination.

Also brushless motor is more dynamic to due to lower rotor inertia.

For low performance speed control, you can use position Hall sensors for both commutation and velocity feedback or even go sensorless.

Hope it helps.

 

thanks for your help.

do you think it is worth developing a BLDC current controller using a microcontroller (PIC) or it may be inefficient due to the possible bad commutation configuration? Is the commutation algorith easy to be programmed to a microcontroller?

thanks again.

 

Dimitris,

Designing a servo amplifier for a bldc drive is not for
beginners. Unless you have the knowledge and experience with this type of amplifier, you would be better advised to use a dc drive.

George Younkin