High voltage brushed motor control problem - back EMF

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  1. - 8th March 2010, 21:03 #8
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    George
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    BTW my dv/dt rise time for my motor back emf is around 1500V/us - also the motor is geared so when mechanically overrun is generating some 200V in reverse direction so that's well over the Vf of the diode and causes significant drag - pretty much locks up!
    Last edited by George; - 8th March 2010 at 21:14. Reason: forgot to ad something
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