I am trying to drive 0.2 ohm motor coils with 12 volts AC and no more than 10 amps. Ohms law says that would be 60 amps. (But not for very long) I am making the AC under computer control and just swapping polarity. That part is working fine except that I need a logic level component on the positive side of the 12 volts. I tried the logic level IRL3103 mosfets that are good for 64 amps and 30 volts. With a resistor in line to keep the amps down, they worked fine on the ground side but the ones on the positive side blew right away. I know they weren’t getting +5 v above their ground, oscillations also.
A P-channel, logic level, 60 amp mosfet would be perfect but there doesn’t seem to be any such animal in captivity. Is there another device that I can use? Maybe an SCR? Can I switch a voltage regulator on and off?
Also, if I send a 10% duty cycle, at a higher frequency than swapping polarity into this coil, will it be the same as 6 amps instead of 60?
I am a digital kind of guy and trial and error can get expensive.
Mosfets don’t have much magic smoke in them.
A P-channel, logic level, 60 amp mosfet would be perfect but there doesn’t seem to be any such animal in captivity. Is there another device that I can use? Maybe an SCR? Can I switch a voltage regulator on and off?
Also, if I send a 10% duty cycle, at a higher frequency than swapping polarity into this coil, will it be the same as 6 amps instead of 60?
I am a digital kind of guy and trial and error can get expensive.
Mosfets don’t have much magic smoke in them.