Once you change the motor side, you can get rid of R3 since the gate is already pulled low by Q3.
First of all the pull down used here, topology-wise (regardless of values used) is not weak, is actually a very strong pull down (hard to beat with other methods). Besides, this kind of pull down improves dv/dt immunity as well.I guess that `weak` condition
First of all the pull down used here, topology-wise (regardless of values used) is not weak, is actually a very strong pull down (hard to beat with other methods). Besides, this kind of pull down improves dv/dt immunity as well.
you can get rid of R3 since the gate is already pulled low by Q3
I can imagine that the circuit suffers from interferences picked up by the high impedance opto coupler and base node, but that's just a guess.
the Min/Max Duty (30-180)
Try what was already explained in posts #8 and #9.and there is alot of noise
Presently acting as a free-wheeling diode, could be used as a brake chopper with respective gate control.What´s the IRG4PC50U good for?
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