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Originally Posted by arber333
Oh, you have a special driver board? And the way you say it, driver chip is glued in some resin? Can you send a photo of the driver board? The one that is connected to IGBT.
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The DC controller is a commercial Product - Netgain Industrial Controller
NetGain WarP-Drive Classic Controller - there is potting compound on some of the circuit, or parts of the circuit.
I have no schematics. I'll get the pictures posted tonight.
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Yes when i heard bang i knew one of the motor winding coils backfired and IGBT got it all. Poor thing exploaded. Even the top blew off. Yes scorch marks were visible, but i took all 3 IGBTs off and measured them just in case.
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I had a big bang as well. No scorch marks visible. It may be possible that the BANG was the fuse element blowing apart? I expected there to be scorch marks, shrapnel, etc but the inside of the controller is quite clean?
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Usually only the top transistor in IGBT is toast.
Drivers i tried with my PSU and if the chips draw more than couple mA something was wrong. With the chips i use sometimes even the DCDC converter is toast, but not allways. So whatever you find you check the pricing and decide.
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I need to make an extension cable so that the controller is connected to external signals - contactor outputs, throttle signals, precharge voltage, etc - while the controller is in pieces. That way I can see how far the signal makes it before it stops - transistor, optocoupler, or blob.