Hi, I'm looking for help to try and resolve what I hope is a relatively simple problem.
I've acquired a kids tractor powered by twin wheelchair 24v geared motors rated at 11amps. These are controlled by a PWM control box with an integral DIN socket which uses a potentiometer for speed control.
This works fine except that the control box is not isolated when the potentiometer is off, if the tractor is on a hill and rolling the motors generate current which blows the control box.
I was thinking of installing relays on the feeds from the control box to each motor, when power is present from the control box the relays would actuate, when the power is off the relays would then effectively become isolating switches.
Simple but I was wondering if there was a more elegant solution, I've also wondered about the PWM regulated current actuating the relay.
Any suggestions appreciated.
Thanks
I've acquired a kids tractor powered by twin wheelchair 24v geared motors rated at 11amps. These are controlled by a PWM control box with an integral DIN socket which uses a potentiometer for speed control.
This works fine except that the control box is not isolated when the potentiometer is off, if the tractor is on a hill and rolling the motors generate current which blows the control box.
I was thinking of installing relays on the feeds from the control box to each motor, when power is present from the control box the relays would actuate, when the power is off the relays would then effectively become isolating switches.
Simple but I was wondering if there was a more elegant solution, I've also wondered about the PWM regulated current actuating the relay.
Any suggestions appreciated.
Thanks