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3 phase AC motor for electric kart with 12 volt , ten batteries in series?

if it is possible to run motor please give me what motor power i need , how many watt power motor i need ?

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iceng2 years ago

YES it is possible to run a 3phase motor on switched triple H-bridge and 746 watts is 1 HP.

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WRONG! It's 2HP (with the guy next to it).

I can understand how you would think that.

Men in Portugal are much stronger then here in the high-altitude state of Nevada ;-D

And apparently smarter. as we would ride the horse, or at leat go in the horsepowered thingy instead of walking along it, or at least lazy enough not to do that...

rickharris2 years ago

Think about how much 10 car batteries weigh.

If your motor consumes 350 watts the the current supplied will be 3 amps.

However the advantage you gain from the lower current is lost in the weight of the battery pack and inverter.

You would be far better off with a 250 - 500 watt DC motor at 24 or 36 volts. This give a much better power to weight ratio.

On flat ground you may get away with the 10 SLA's but on any kind of rise your going to loose out.

A human on a bike puts out about 1/2 a HP (350 watts) over the long term. Most electric kart/bike systems match this from the motor.

rasik4 (author)  rickharris2 years ago
thanks for the reply,.. here in my country Nepal, every tools have 220-240 volt ac motor but i could not find any dc motor in my country , i never seen forklift in my country neither golf cart , neither any dc operated tools so i am just thinking to order from india or china when i have money..

What kind of tools are you talking about? Power drill? They should work on AC and DC even though they are supposed to plug into an AC supply.

It´s already a bit hard to make a kart with a mains single-phase motor, but with a 3-phase one the procedure is the same. However, everything you would use would have to be 3 phase. I don't know if its the same way in 120v countries, but where I live (220v) the voltage for 3-phase is different (380v), so, it might be different in 120v countries as well. Also, 3-phase motors work on AC current, but batteries suply DC current, unusable for the motor. So, you would need an inverter, a 3-phase one, and actually I don't know if they exist and if they do, I guess they should be a lot larger than the one you need.

Basicly, it's better just to get a 12 or 24v DC motor. Maybe 36v. that way you wouldn't need the inverter, which can be quite heavy and higher voltage is also more dangerous in the case of an accident.

rasik4 (author)  tgferreira1842 years ago
thanks for the reply,.. here in my country Nepal, every tools have 220-240 volt ac motor but i could not find any dc motor in my country , i never seen forklift in my country neither golf cart , neither any dc operated tools so i am just thinking to order from india or china when i have money..