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need help on electric go cart

I have an idea for making a go cart with a in wheel motor, same idea as the volvo recharge My idea is to have electromagnetic "flaps" that can be turned on and off and i was wondering how i could turn them on and off precisely so i could control the acceleration and other variables I was thinking about using a hall sensor but i couldn't control very much about that so any ideas would be great thnx The flaps that i am talking about are a coil of wires, laminated, and i will have alot of them. then i would place them on a smaller wheel side by side. they need to be actuated so that if there was a magnet that is before it the coils will turn on and when it passes it will turn off, i would need to control the actuation of the coils so i could accelerate. And would a variable resistor be able to control the speed of the cart? Report Post Reply With Quote

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hintss7 years ago
I'm thinking arduino: the arduino produces the switching required for motion and you connect the potentiometer to the arduino, and have it read that and variate the switching speed to the coils. You can't directly connect the potentiometer, that would be for torque, I think. and with arduino, you wouldn't need the hall efffect sensors.
guyfrom7up8 years ago
Quick Question, how much do you know about electronics? I don't think that that's a very practical way for a non-company to build a car. I'd use a motor with gears. For variable speed you need PWM, basically it just sends pulses of electricity to the motor, and depending on the duty cycle is how fast you go (0% duty cycle, you don't go anywhere, 50% half speed, 75% 3/4 speed, 100% full speed). For breaks just turn off the motor and using a circuit you can recharge the battery, also have normal breaks incase it doesn't slow fast enough.
squirt8500 (author)  guyfrom7up8 years ago
i don't know much about electronics but i think i could make a small scale version of the motor, test its strength and other things
I just don't think it's that strong and it is very inefficient. The coupling is worse than a normal motor and it's brute magnetics, no gears involved
NachoMahma8 years ago
. Sounds like a servo motor to me.