Building an electric cart

Hi,

I want to build an electric cart with a max load of 500KG, the max speed should be around 15km/h.
Sometimes the cart is going to drive on a dirt road with a small ascent, and then it should be slower than the max speed.
I've used the VESC calculator to calculate the desired power of the EV (https://vesc-project.com/calculators) - around 2500W.

The first option is to use VESC (Sensored BLDC controlled, no FOC):
Controller - https://flipsky.net/products/torque-esc-vesc-%C2%AE-bldc-electronic-speed-controller
Motor - https://flipsky.net/collections/e-skateboard/products/flipsky-electric-skateboard-motor-r-6374-190kv-3250w
Battery - 48V 20AH 4c

The second option is to use a generic controller:
https://www.aliexpress.com/item/KUNRAY-BLDC-72V-3000W-Brushless-Motor-Kit-With-24-Mosfet-50A-Controller-For-Electric-Scooter-E/32862749941.html
With the same battery.

With option do you think is better, and do you think it should work?
FOC (Sine-wave) will make it work better?

Thanks.

Not sure what you mean by "cart" but if it will carry 500KG why not use inexpensive, larger ebike hardware instead of those rinky dink overpriced skateboard motors and controllers?

State your intended use and design in more detail, and someone will recommend a much simpler, and less expensive solution in the form of hub motors.

Sine wave will be almost silent paired with a hub motor.

Would even the electric bike parts be strong enough? Carrying over 500KG/1,100pounds, plug its' own weight? As he says it'll be easier to discuss when we can picture what the result is supposed to be.

Let's see, if you wanted to build a radio controlled cart, you could build a backbone chassis much like in this instructable and put a big Radio Flyer like wagon on top. https://www.instructables.com/id/Build-an-Electric-Car-Powered-by-a-Bike-Motor/ Oops, pictures finally loaded for me after I had it posted and it's the wrong one. In case you found it interesting I left it, but here's what I meant to put up. https://www.instructables.com/id/Electric-Vehicle-A-simple-lightweight-EV-platform-/

Or if you want to sit there and drive it, maybe you could enlarge this miniature Mini Moke. https://www.instructables.com/id/Making-of-a-Mini-Electrical-Car/

Thank you for your replies!

It's going to be something like this: https://www.amazon.com/Gorilla-Carts-GOR1001-COM-Heavy-Duty-Removable/dp/B01BECQEA2 and instead the rod going to be a servo motor for the steering. The motor will drive the rear axle with a differential.
I'm going to build the chassis myself, for me, this is the easier part. There are so many options for motors and the controller, and I don't know which option is the best for this project. I don't care about the weight of the motor and the controller, but I want it to be effective, so it's important to support hall sensors or sine-wave operation (Am I right?).

I'm not sure that e-bike parts will be strong enough, and the torque is more important than speed for me.
By saying inexpensive, larger e-bike hardware, what do you mean? More like the second option? or there is something else?

Chef.

Instead of a differential how about 1-1.5kw hubs that won't require it? Figure out one or two controllers, etc, it gets to be an easy build.

Do you have any recommendation for a motor and a controller, about 3kw with sine wave or FOC, the weight doesn't matter and not expensive one?

chef said:

Do you have any recommendation for a motor and a controller, about 3kw with sine wave or FOC, the weight doesn't matter and not expensive one?

Click to expand...

The cyclone 3000 kit sells for about $400, and I also believe you can get a ASI sinewave controller specifically designed for it for $169. Idk if that's out of your budget though.

To the other guy building a kart, make your own thread since what you're doing is totally different from what the chef is doing. And in any case, do not use lead acid since that is always a huge mistake (unless you're building a submarine).

They have hub motors with small diameter, reinforced wheels. Diff not needed with this arrangement.

Sine wave is much quieter, especially with hubs. Also smoother at low speeds. Not much more effective outside of those aspects.