Using Brushless drives with brushed motors

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25 Sep 2018 00:14 #117944 by Catch22
I read somewhere that you can use brushless servo drives with brushed servo motors. I am looking at some Advanced Motion Controls Be25a20 that is brushless and I want to make sure that I can use them with my brushed servo motors. Can anyone verify this for me.
Thanks Mike

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25 Sep 2018 01:53 #117945 by jmelson
If the drives use the simple six-step scheme, where they only drive 2 of the 3 output terminals at a time, and only use the Hall commutation signals, this can be done by wiring a permanent configuration on the Hall inputs. You would have 2 of the hall inputs set to one condition (either high or low) and the one other input to the opposite condition. This would force the drive to always drive the same 2 output terminals.

The data sheet may have instructions on how to do this.

If the drive in question is sinusoidal or uses encoder feedback, then this cannot(generally) be done.

Jon
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25 Sep 2018 04:15 #117947 by cmorley
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