What signals does the H-bridge require?
I use IR2110 IC's and they can drive 1200V 600 amp IGBT's using a 3.3 or higher logic level input.
Logic level mosfets can easily accomplish this task
490Hz is audible, why not use below 40Hz or above 18000?
Where are you from you didn't write it in your info?
Look up a H-brige mosfet circuit.
N-channel is tied to ground and P-channel to V+
N-channel should be pulsed with the PWM because they generally have a lower Rds