Hi All,
I am still trying to get my 3 phase inverter working, I have successfuly managed to get my PIC MCU working great, and have used it to generate 3 signals which I then fed into 3 L6384's (half bridge drivers). This has all been tested and works a treat...
I have put together a bridge using 6 P55NF06 MOSFETs... When I connected them to 24v (nothing else connected) they quite literally blew up and caught fire... see attached photo.
The high side drains are all connected to +24v via the heatsink, and the source is bolted to the drain of the low side. The low side source is soldered to a wide track and bolted to ground.
All gate pins go to the pins on the left of the board.
I do not have any protection diodes in - partly because I wasn't planning on putting a load on it yet.. and also, I'm not sure what diodes to use, any suggestions? bearing in mind I'm planning on using an alternator as a 3phase induction motor.
I also have a circuit breaker on the positive side... which I reset when I want to turn it on. This is one of my theories... could resetting a breaker produce a large enough spike to damage the MOSFETs?
Any suggestions, observations, ideas or help would be welcome!
Cheers
Shaun
I am still trying to get my 3 phase inverter working, I have successfuly managed to get my PIC MCU working great, and have used it to generate 3 signals which I then fed into 3 L6384's (half bridge drivers). This has all been tested and works a treat...
I have put together a bridge using 6 P55NF06 MOSFETs... When I connected them to 24v (nothing else connected) they quite literally blew up and caught fire... see attached photo.
The high side drains are all connected to +24v via the heatsink, and the source is bolted to the drain of the low side. The low side source is soldered to a wide track and bolted to ground.
All gate pins go to the pins on the left of the board.
I do not have any protection diodes in - partly because I wasn't planning on putting a load on it yet.. and also, I'm not sure what diodes to use, any suggestions? bearing in mind I'm planning on using an alternator as a 3phase induction motor.
I also have a circuit breaker on the positive side... which I reset when I want to turn it on. This is one of my theories... could resetting a breaker produce a large enough spike to damage the MOSFETs?
Any suggestions, observations, ideas or help would be welcome!
Cheers
Shaun
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