Brushless DC motor dimensions
Brushless DC motor dimensions
(OP)
Hi,
I am looking at replacing a brushed DC motor with a planetary gearbox with a similar brushless variety. So far all of the ones I found are much longer in length, and with a slightly smaller diameter. Is this extra length an inherent feature due to the control electronics?
Thanks
I am looking at replacing a brushed DC motor with a planetary gearbox with a similar brushless variety. So far all of the ones I found are much longer in length, and with a slightly smaller diameter. Is this extra length an inherent feature due to the control electronics?
Thanks





RE: Brushless DC motor dimensions
Not necessarily. Brushless motors do not have to include the drive electronics. They may have some type of rotor position feedback (encoder, hall switches for commutation, resolver etc.). This would not have to occupy any more room than the commutation system on the brush motor (commutator and brush rigging).
RE: Brushless DC motor dimensions
As Clyde stated, brushless motor usually have sensors (in my experience they have been Hall effect) in the rear of the motor to sense rotor position, but these are often small and take up less room than the brushed motor commutator.
Do the motors you are looking at have the controller built into them? That would explain the longer motor.
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