Gas to Electric GoCart Conversion - 150cc 2 seater gocart.

Step 3: Electronics

I used an Alltrax Series Wound Brushed DC Motor Controller (about $300) specs are:

Max Current: 300A
Cont. Current: 100A
Max Voltage: 50V
Min Voltage: 20V
Throttle Type: 0-5k


The power system uses 4 Gauge wire. They will get a little warm to the touch after doing donuts for awhile.

The contactor was left over from another project, this one is overkill and you really only need about a 150A contactor. but make sure that the coil rating is the same or a little higher than your system voltage or it can melt. (500A/48V)

The controller contains capacitors to smooth out the power flow. If the controller has no voltage on it and you apply power quickly it can destroy the controller. The Precharge Resistor keeps the capacitors charged even when the key is off. (20ohm/25watt)

When the contactor turns off, the coils create a huge burst of high voltage. The reverse protection diode stops this voltage from getting to the controller and damaging it. (600V/5A)

Comments

[SolarImages]

I am currently looking at rebuilding my two electric golf garts with custom frames both have 36 volt systems currently (the only thing usable in the electrical system is the 36 volt motor and the batteries) i am looking for information on what to buy for a controller and contactor as well as anything else i might need to run them (they both have good hydralic brakes) thanks for any help here.

[SolarImages]

I don't soppose i could get a diagram of your wiring?

[ozy1970]

Hello, Nicholast I like your electric conversion,
now in a electric mode did you field a power loose
against the old gas powered mode?
I think you could use to sopport the electric engina a scisors bolt floor jack whit rubered soports
¡ congratulations ¡

[dieterschmied]

I wish there was more explanation of the control system. I am not an electrical engineer so I don't really appreciate the logic of the circuitry. Is there a elctric 101 for dummies?

It is a very interesting project.