24v motor controller help

**ady** · 3rd January 2015, 12:57

Bit stuck on latest project. The cheapo mobility scooter i bought has an intermittant problem with the electronic brake/control panel. It says the brake is on but most of the time pressing the button doesnt seem to release it and wont allow the motor to move. I think it must control a relay or something inside the speed controller. I can get it moving sometimes, Could i bypass it? All i need this to do is go flat out forward or reverse and be reliable, i dont even need the speed control, it has a paddle for forwards and a paddle for reverse. Or is their a basic motor controller i could buy. Its a 24v 16ah motor with 2 x 12v 36amp batteries. Cheers

**maddox10** · 3rd January 2015, 14:29

A brake on such a motor is nothing more than a very large area solenoid with brake surfaces.

Bypassing it is not difficult. Supply 24V to the brake seperatly.
It's not even a heavy load, and can be done with even a feeble switch.

**ady** · 3rd January 2015, 14:34

thanks for reply. I now have a speed control diagram which may help. I tried just disconnecting 2 brake wires before seeing your post but it made no difference. Could you have a look at pic before i try this to see what you think on how to bypass control panel completley and just run own wiring direct to controller (im sure its control pcb fault and not controller) i just need basic forwards reverse bang bang operation pretty much dont even need speed control.

**john_frizell** · 3rd January 2015, 14:53

The brakes on scooters are usually 12 V units connected in series. They require voltage across them to unlock them. If you connect the two brakes (which are the 2 thin wires in the cable going to each motor) in series, and then apply 24V to that, they will unlock. Better, assuming you are not planning to have disabled people ride in the scooter, is to take the end caps off the motors, remove the brakes, and replace the end caps.

**ady** · 3rd January 2015, 15:02

Bit more info. Im getting it working then it stops and the speed control flashes 5 times which according to instructions is a parking brake fault, which is the button on the control panel that isnt responding.

**ady** · 3rd January 2015, 15:12

im mounting my dodgem to the mobility chassis lol no disabled people will use it. Its one big motor that has 4 wires, red black and 2 white. Id rather bypass brake than dismantle motor as i dont feel confident doing that. Wont the speed controller still think that the brake is on though if i bypass stuff? And not allow power to motor. I think its the control panel not telling the speed controller that the brake has been turned off if u get me