can some please check over this simple circuit

Thread Starter

jsharpe87

Joined Sep 5, 2011
4
i have this project for my sons peddle quad to convert it to a electric quad
i have done all the labour work to remove peddle's and connecting a 24v electric motor to a chain driven rear axel

now to the electrics. i have a push button switch on the handle bars that i want to use on two circuits (forward and reverse).

the other switch is a two way switch to select what circuit too use (Forward or reverse)

the electric motor only has two wires from is so both circuits will be wired to these leads but one will be in reverse.

i have two 12v batteries that i think if you run parrellel then this creates a 24v battery?mmmmmmm?

does this circuit work or is there any faults?

thanks for looking.
 

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iONic

Joined Nov 16, 2007
1,650
i have this project for my sons peddle quad to convert it to a electric quad
i have done all the labour work to remove peddle's and connecting a 24v electric motor to a chain driven rear axel

now to the electrics. i have a push button switch on the handle bars that i want to use on two circuits (forward and reverse).

the other switch is a two way switch to select what circuit too use (Forward or reverse)

the electric motor only has two wires from is so both circuits will be wired to these leads but one will be in reverse.

i have two 12v batteries that i think if you run parrellel then this creates a 24v battery?mmmmmmm?

does this circuit work or is there any faults?

thanks for looking.
I think you meant that hooking up 2 12V batteries in series makes 24V.
The switch for forward and reverse isn't so bad, but the switch for powering the quad is either on full 24V/full current or off nothing. There is no speed control. An ideal situation would be to have a lever connected to a variable pot that springs back to off if let go of or a hall-effects sensor throttle that essentially does the same. Either throttle configuration will require a PWM controller to vary the Pulse width signal to the motor to create acceleration.
You wouldn't want to flip a switch to full power and have your son panic and not be able to turn the power off.
 

mcasale

Joined Jul 18, 2011
210
Yes, I agree IONIC. You should have some sort of speed control. Going to full speed could be scary, or the motor could stall. How much current does the DC motor draw at full speed? You may want to consider designing a PWM motor controller, or buy one from numerous motor drive vendors. depending on the current drive, it should be less than $100 (I think).
 

Thread Starter

jsharpe87

Joined Sep 5, 2011
4
So would this be correct then and yes i would like the idea of speed control but this was a budget project and may modify at a later date thanks for your help guys it really helped
 

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