rascupanamuha
Member
Hi,
I am having trouble with my brushless DC motor controller board.
It is working perfectly for a period of time, and then (after few minutes), when i start to move electric vehicle, mosfet and mosfet driver explode. I dont know who is the first one to fail.
I have limited current to 20A (mosfet can resist up to 100A), so i dont think this is the problem.
Maybe the problem is some voltage spike that burn the mosfet down
Im using MIC4604 with 4.7uF capacitors for gate charging and PSMN3R9 mosfets with 68ohm gate resistance.
Battery voltage is 24V (which is significuntly lower than mosfets 60V...)
Why does it burn down? Do i have to put some diodes to block that voltage spikes? How?
Please help me
I am having trouble with my brushless DC motor controller board.
It is working perfectly for a period of time, and then (after few minutes), when i start to move electric vehicle, mosfet and mosfet driver explode. I dont know who is the first one to fail.
I have limited current to 20A (mosfet can resist up to 100A), so i dont think this is the problem.
Maybe the problem is some voltage spike that burn the mosfet down
Im using MIC4604 with 4.7uF capacitors for gate charging and PSMN3R9 mosfets with 68ohm gate resistance.
Battery voltage is 24V (which is significuntly lower than mosfets 60V...)
Why does it burn down? Do i have to put some diodes to block that voltage spikes? How?
Please help me