I am building and testing the transmitter side of a wireless charger.
The image below is a rough representation of what I am doing, U1 is powered by an IR2110 driver at 5kHz off a 555. V1 is 30VDC and the flyback diode is a 10 amp ultra fast recovery diode( cant remember exact model)
When measuring across the load on a scope I get a just the positive cycle of a sine wave ( so what a sine wave looks like after a rectifier), its voltage however, comes solely from the mosfet and if I am to increase and reduce the supply it does not effect the wave. I can't for the life of me figure out why?
Could this be to do with the internal diode inside the MOSFET? Would an H-bridge configuration work better in this situation?
Why does this not work? Because in my head the voltage across L1 should be drain signal plus V1 shouldn't it?