roghaj Posted September 15, 2019 Share Posted September 15, 2019 I have a Gotway V3 that just fried a Fet. I can put the same sort of IRFB3207 back in there, but I'd rather upgrade. I don't have any problem changing the FETs but I lack the understanding necessary to select a superior FET. So should I just buy 12 IRFB3207 FETs or is there a benefit to an upgrade. Thanks -Roger in Anaheim CA Quote Link to comment Share on other sites More sharing options...
Chriull Posted September 16, 2019 Share Posted September 16, 2019 9 hours ago, roghaj said: I have a Gotway V3 that just fried a Fet. I can put the same sort of IRFB3207 back in there, but I'd rather upgrade. I don't have any problem changing the FETs but I lack the understanding necessary to select a superior FET. So should I just buy 12 IRFB3207 FETs or is there a benefit to an upgrade. Seems to be fine. If there is place, upgrading to a mosfet in a to 247 package could improve the thermal situation. The electrical insulation and thermal "connectivity" is imho a main point to look at and seems to improvable. There are links to videos with a test of different materials to mount the mosfets: Beside the thermal and electric limits the choosen mosfet needs switching characteristics/gate capacities so that he can be switched fast and clean by the gate drivers. Btw: there are chances, that not only the mosfet died... Quote Link to comment Share on other sites More sharing options...
roghaj Posted September 16, 2019 Author Share Posted September 16, 2019 Yeah, I removed the fets and there is some level of continuity between the gate and the drain pads on the naked board. I doubt I can find the cause. Quote Link to comment Share on other sites More sharing options...
roghaj Posted September 16, 2019 Author Share Posted September 16, 2019 I am having trouble finding a replacement board. They say it is a discontinued item. can I buy a board from another gotway product and make it work? It was a 64V battery if I recall correctly. Quote Link to comment Share on other sites More sharing options...
Chriull Posted September 16, 2019 Share Posted September 16, 2019 50 minutes ago, roghaj said: Yeah, I removed the fets and there is some level of continuity between the gate and the drain pads on the naked board. I doubt I can find the cause. Which could but does not have to mean that the gate drivers died, too - it's a wanted defined "start up" state that gate and source of the mosfets are "connected", so Drain-Soruce is not conducting! Quote Link to comment Share on other sites More sharing options...
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