By i6pwr
I have switched the stock 550 size motors to a higher torque set and they draw about 50A when climbing small hills, the stockers pull just under 30A. He can run around by himself but if he takes a passenger then he starts tripping breakers.
What I had in mind is using the factory on/off accel pedal, shifter w/ reverse to handle the 12V signal leads for some 60A relays. The accel pedal is easy and I have that drawn up, but using separate relays for the series/parallel switching is challenging at least for me, since I need to incorporate a reverse.
There is also a small ground wire that is connected back to motor POS + to allow for braking.
Here’s a sketch of what I’m working on…the factory wiring is on the left and what I have been working on is on the right. The Polarity reversing relay is a borrowed pic and could serve as a reverse either solo or using two relays. Not something I have but is something I have found that handles high current.
The factory shifter has a dual-layer buss bar in the housing which routes the circuits as needed which makes this project slightly difficult to replicate.
I have ample room to run extra wires and what I would like to retain is the factory shifter for the switching if all possible.
I have toyed with hall-effect scooter throttles and ESC’s but all require a minimum of 20V. Could this idea of using relays work or should I try for some high-current motor controllers?
All help and criticism appreciated.
Source: DoItYourself.com



