matt912836
100 W
I've had a Sabvoton 96100 and 96120 both sitting around for years because each had a blown set of fets
Rather than order a new set of matching ones, I took the impatient route of taking a set of working ones from one and using them to replace a set of blown ones in the other.
The 96100 has 8 irfb4115's per phase and the 96120 has 10 irf135b203s per phase.
I took 8 working irf135b's from the 96120 and replaced the 8 blown irfb4115's in the 96100. It now has 16 irfb4115's working on two phases and 8 135b's on the last phase.
Before replacing the fets the controller registered as shorted at the positive and negative on a voltmeter and could not even be plugged into any power source. After replacing the fets, the controller powers on and spins the wheel just fine. Haven't taken it out for an actual ride to give it a load but on the bench spinning the weight of a heavy dirt bike wheel seems to be working just fine, including running flux weakening and slide regen.
What possible problems may I run into, assuming all the remaining FETs are healthy and aren't compromised at all from the first initial failure? Both FETs work at the same voltage and the 135b's are actually capable of more amps. As long as I remain within amp limits of the lower spec original fets, will this repair work just fine in the long run?
Rather than order a new set of matching ones, I took the impatient route of taking a set of working ones from one and using them to replace a set of blown ones in the other.
The 96100 has 8 irfb4115's per phase and the 96120 has 10 irf135b203s per phase.
I took 8 working irf135b's from the 96120 and replaced the 8 blown irfb4115's in the 96100. It now has 16 irfb4115's working on two phases and 8 135b's on the last phase.
Before replacing the fets the controller registered as shorted at the positive and negative on a voltmeter and could not even be plugged into any power source. After replacing the fets, the controller powers on and spins the wheel just fine. Haven't taken it out for an actual ride to give it a load but on the bench spinning the weight of a heavy dirt bike wheel seems to be working just fine, including running flux weakening and slide regen.
What possible problems may I run into, assuming all the remaining FETs are healthy and aren't compromised at all from the first initial failure? Both FETs work at the same voltage and the 135b's are actually capable of more amps. As long as I remain within amp limits of the lower spec original fets, will this repair work just fine in the long run?
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