I am trying to design an H-bridge inverter to supply maximum current to my coils. I need to supply as much current as possible so that I can make a electromagnet whose polarity constantly flips so that i can levitate a moving Halbach array over top of those coils.
I've tried a number of things to make my mosfets as efficient as possible but when I enter in my Rds values into PSIM the current drops to 4mA. I have a DC power supply capable of outputting 18V and 10A.
when I run the simulation I get that the current is through the coil is only 4mA which is nowhere near enough, I'm not sure if I am simulating something incorrectly or if thats correct based on the way the circuit is designed. Does anyone know how to maximize the current the coil? also even with the RC snubber circuit my MOSFETS are heating up alot! is there a better way to reduce that? My PWM frequency is at 120Hz from an arduino, and its a 40% duty cycle.
My coils have 220 turns and are 18 gauge wire, with a radius of 2cm and a length of 2.5cm, they are air coils I dont have any core.
My mosfets are FQP27P06 FQP30N06L
Thanks in Advance
However I'm finding that the magnetic field produced through these coils is not strong enough to levitate my pod. Is there something I can do to make this stronger?