Which parts to trade out of a PWM for higher HP
If I were doing this, I would be looking at off the shelf PWM boards like this one: https://smile.amazon.com/RioRand-7-80V-Motor-Controller-Switch/dp/B071NQ5G71

There are tons of variations available on amazon, ebay, and ali express.

You can probably even swap the potentiometer out for a peddle without too much difficulty.

If you really want to build something, or you can't find a controller with the right specs for your project. Here's the basic building blocks:


Mosfet switch circuit. Needs to handle your voltage and current requirements. Don't forget the freewheeling diode. You can hook up multiple mosfets in parallel to increase the current capability.





Gate driver circuit. This slams the mosfet off and on fast, which will drastically decrease the heat it generates. It's just 1 chip and some caps.

PWM generator. I would just use an arduino for this. The sketch will be very short, and you can easily change the limits and output frequency. Get a peddle and hook it to the arduino as an analog input.