[yongkimleng]

One of the larger problems would be to actually choose the right MOSFETs and drive them correctly. I did a bit of intensive reading and found two things

1. high side mosfets (near to +ve) and low side mosfets (near to GND). A pair of high side and a pair of low side MOSFETs make up a HBridge.

2. MOSFET drivers - faster u saturate the mosfet, lesser heat generated, lesser power losses

3. proper timing to prevent "strikethroughs" where +ve is shorted to ground during switching.

4. balancing resistors to provide proper distribution when running MOSFETs in parallel

5. dropping in a hall effect sensor for current sensing is good too.

Being unfamiliar with discrete MOSFETs, I did run them off a TLE5205 (5A constant) Hbridge which takes TTL inputs. Next step would be to run some 5205s in parallel - or try discrete MOSFETs.....

Unfortunately TLE5205s are rather hard to find in my area recently. Not sure for you guys.