I am working with my 13 year old son to setup a electric go kart. We currently have a rolling kart and essentially need all the electrical components: Motor, Speed controller, Wiring, batteries, charger, charger port, foot pedal, key switch, fuse, etc...
The kart currently has a 60 tooth sprocket with a #35 chain. Also, the size tires on it are 11 - 11.5" in diameter. I would like the kart to have some zip and top speed between 20 - 30mph. Additionally, I would like the battery life to last ~ 45 minutes or so.
I saw a previous kit that was assembled and wondering if this KIT-159 would be a good fit for my needs:
One other nice to have, would be the option to connect 12v accessories(lights and/or horn). I believe the kit above has a converter included to address that, however I am not sure how the wiring works for that.
I am open to other kits or suggested changes. Please let me know your thoughts.
Thanks in advance!
Also, I'd like to add a voltmeter like MET-120V-RED: https://cart.electricscooterparts.com/15-120-volt-dc-red-led-digital-voltmeter . For this, the speed limiter, & the 12v accessory converter I am not sure how the wiring would work. Is there anything you could point me to? Thx.
I ran some Gear Ratio Calculations and found that with a 60 tooth axle sprocket and 11.5" wheels the top speed is around 17 MPH. For a top speed of 25 MPH an axle sprocket with around 40 teeth would be needed. Here are the calculations:
It sounds like KIT-159 would work good for your project. The 22Ah batteries in this kit would provide around 60 minutes of Ride Time on flat ground.
KIT-159 has a 3-position key switch which turns the power off, on, and activates reverse (off - on forward - on reverse). With a kit that has reverse relays such as KIT-159 the go kart has to be at a complete stop before switching from forward to reverse, or reverse to forward, otherwise the controller will become damaged.
If you do not need reverse then we could make a kit without reverse which would cost less. If you prefer toggle switches to a key switch we could make a kit like that also.
We can make a kit with two toggle switches for power and reverse along with a motor reversing contactor that would stop the motor between switching from forward to reverse. This type of kit would be more reliable than a kit with reverse relays because the chances of the controller being damaged from switching directions when the go kart was moving would be significantly lowered. The go kart would still need to be completely stopped before switching from forward to reverse, or reverse to forward, because the motor reversing contactor puts an electrical brake on the motor between its forward and reverse positions.
We can add a Voltmeter to any of our kits.
Please let us know your thoughts on which type of kit you would like. Non reversing? With key switch and reverse relays? With toggle switches and motor reversing contactor?
Great, thank you! In this case, I like this option. https://cart.electricscooterparts.com/36-volt-1000-watt-electric-go-kart-power-kit-with-reverse-KIT-361000-01
However, I actually already have the batteries. Therefore, would you be able to make the same kit minus the 3 batteries? If so, this will allow me to select the proper wire lengths for the kit and I will purchase that. And we can cancel the order that you placed on hold.
Great! Thank you for creating the new kit. I will hold off on the speed limiter and see. If I feel it's needed, I can come back and order it in the future.
I see your order for the kit item # KIT-361000-01-NB in our system. We will start building it on Monday. Thank you for your order - we appreciate your business.
We received the kit and were able to get it up an running over the weekend. I just had a couple of questions:
1) Is there any difference in speed or torque with forward vs reverse? The reason I ask, is that when we wired it up per all the labels, when the switch was in "F" the motor went in reverse. So to fix this, I swapped the motor cables that connect to the reverse relay. By doing this, it did correct it, so now when the switch is on "F" it goes forward. I was just wondering if that was the correct way to fix it and if there is any difference in foward vs reverse(either by the motor or how the controller distributes power to the motor).
2) Could hot weather cause the fuse to blow? On Sunday, it was ~103 degrees out. My son was driving the cart for about 5 minutes and then the main 40Amp fuse blew. I am wondering if this was due to the extreme heat or if there is something else I should be investigating.
Thank you. The Axel sproket has 60 teeth and the motor sprocket has 11 teeth. Tires are about 11 to 11.5 inches. Lastly, the driver weight is about 110lbs. The fuse blew while driving on flat surface/no hills.
Thanks in advance for your help.