I have a hoveround scooter 24 volt DC motors The brakes are 20 volt DC. The hoveround has a broken circuit board and I am jerry rigging it but need the 29 volts some how

Actually hoverround requires about 25 or 26 vt to operate, ( if you put the meter in the charging port it has to read at least about 25.4 vt for the chair to operate properly.

Also when you move it forward it has to have less than a 2 vt drop when in use to know it is operating properly.

The brakes work though the controller of the unit that sends the proper voltage to the brakes. ( they are always locked as long as the joy stick is not in use)

Which circuit board is broken ?

I work on Invacare, Pride, and several other brands, even design seating systems, but don't do many hoverrounds. The older models operae on a slightly different system than the newer ones do.
But I know on the pride and invacare there reeally is no step down on the voltage ( even though brakes actually show a lower one on the specs)

This is one of the hoverround issues, they are part specific from only them, while several other brands first don't use that many circiut boards and have aftermarket parts available.


Also while talking about 9vt, this tells you a lot about droping voltage, it works the same way, merely different reisters http://www.ehow.com/how_2252605_make...r-circuit.html

In reality, I would current control the brakes rather than use voltage. Need to know voltage (20 V) and current (?).

I designed a tension control system once. The only thing I did wrong was OFF should have been a slight repel.

It's also bet to PWM control the motors. PWM kits are available for about $25.