Next step is to design a powerful H-bridge that can drive larger DC motors that can actually drive a full-scale Segway clone. Yesterday I ordered a bunch of components, most notably:
- 1 HIP4081AIP H-bridge driver IC.
- 4 IRFZ44N N-channel MOSFET transistor, capable of controlling 49 amps at 55 volts.
- 1 LM2574N-12 step-down switch regulator to provide the 12 volts required by the HIP4081AIP, from a 24-28 volt power supply (sealed lead-acid batteries).
My plan is to build a prototype motor driver on a breadboard and try it out for smaller currents, measuring timing and voltage levels on eg. the MOSFET gates. When it all seems to work, I will design a PCB capable of handling the full 25-40 amps required by larger motors.
One source of inspiration (an open-source, open-hardware motor driver):
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