That's what they call a woodruff key. That will work with a normal keyed hub. Don't know if I'd recommend that motor though. I don't think winch motors are designed for continuous duty. Also, unless you want to run full throttle all the time, you're going to need a speed controller. The motor is rated for 4hp at 12V. That comes out to over 250 amps. I think a speed controller to handle that would be spendy.
Electric motors in karts: a simple guide
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You have the issue with a suitable controller. A 12V controller that can handle 250amps is kind of unusual. You mentioned that you were looking for one. What did you find? In my limited experience, high power 12V motors are always controlled by some kind of a switch or a heavy duty relay (think pool pumps, starter motors, etc). Conversely, all the electronic motor controllers I've come across that control high power motors are used with higher voltages (36V and up). Check out these guys for instance:http://www.tncscooters.com. The lowest voltage motor they have is 24V and the biggest 24V motor you can get is 600W. That's quarter the power of the motor your looking at with twice the voltage.
Per the OP, he suggested overvolting a motor. So in this case, I am planning to run the 12v motor at 24v with 2 12v batteries in series. Then again, I can also just run a 24v motor as is. So the controller that I have in mind is a Alltrax AXE which can handle the task with ease. The next thing would be a foot throttle and I don't really know what to get but I will probably call the dealer for such. Money is adding up quickly.
Thanks for your advices.
Steve
The lowest voltage that the Alltrax AXE line can handle is 48V. Problem is that AMPS scale with voltage so now you're up to 500 Amps. Not to worry though, the AXE 4855 can handle that for the low price of $500. Ouch. Come to think of it, you're going to have issues with batteries as well. All the batteries I've looked at are rated somewhere below 100Amps and those were 6V golf cart batteries. You'll need to run two or more in parallel + 2 in series so 4 batteries minimum.
The ones that I looked at run 24 to 48v and cost $350
http://www.ebay.com/itm/390347525264?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
I don't see how battery is going to be a problem. 2 12v run in series will give me 24v. Current is something the motor draws at a given load. The batteries should have no problem providing it. The controller can easily handle that.
Steve
nedfunnell
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NSR, that looks like a good setup to me.
Wingnut, there's a broader spectrum of parts and knowledge out there.
Wingnut, there's a broader spectrum of parts and knowledge out there.
Banditz
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For that motor i would def. use two yellow tops! just keep in mind the duty rating of that controller. To get it to handle that kinda amperage for a sustained amount of time you WILL need to have great air flow.
As for a winch motor, NO they are NOT meant for a continous load. If ran anywhere near a full duty cycle they will burn up fast. Just thinking here but they are meant to run long enough to pull a vehicle out of mud or whatever. the longest winch line i have ever seen commonly is around 100ft. MAYBE 120'... Ever feel one of those motor's when they are done? lol Let's just say you really don't want to! I would seriously think of some other kind of motor. Also, unless you find one that you can take the gears out of you will have all the tourqe in the world, but only be moving at 12mph. lol
As for a winch motor, NO they are NOT meant for a continous load. If ran anywhere near a full duty cycle they will burn up fast. Just thinking here but they are meant to run long enough to pull a vehicle out of mud or whatever. the longest winch line i have ever seen commonly is around 100ft. MAYBE 120'... Ever feel one of those motor's when they are done? lol Let's just say you really don't want to! I would seriously think of some other kind of motor. Also, unless you find one that you can take the gears out of you will have all the tourqe in the world, but only be moving at 12mph. lol
Banditz
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Oh, and GREAT post OP. Only thing you said I would alter or even consider being a bit off is the amount it takes to stop your heart. Yes, your amount there is correct. BUT it takes a minimal of .08 amps just to get past the skins barrier. Of course that's with sweaty almsot wet hands. Like when we are out busting our butts at work. The salt level in our sweat helps the current flow. Otheriwse yeah, once it got past that barrier then the amount you said would stop the heart.
Banditz
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Crap, sorry just took a better look at that motor, It's not mounted to a gear box. But while I was looking I see it says its rated power is at 2100rpm..That'a a very sturdy motor, but very slow. You can do what you wish, and gearing IS everything..but to me I would pick another..
Ah. Controller is a good find but the ebay add is a little misleading. According to the Alltrax web site, it's rated for 150Amps continuous.
Yes, the current draw is set by the motor but batteries have a max rating before they start to take damage. Just like the controller and the motor, there's a difference between the continuous duty rating and the 'max' rating. Car batteries spec amps but that's a max rating intended to be used for just as long as it takes to start your car. Check out batteries marketed to golf carts and they'll spec continuous duy amps. I think you'll find much smaller numbers than you're talking about.
Yes, the current draw is set by the motor but batteries have a max rating before they start to take damage. Just like the controller and the motor, there's a difference between the continuous duty rating and the 'max' rating. Car batteries spec amps but that's a max rating intended to be used for just as long as it takes to start your car. Check out batteries marketed to golf carts and they'll spec continuous duy amps. I think you'll find much smaller numbers than you're talking about.
I'm considering this 24v, 400W brushless DC motor with built in controller for my small kart project: www.electricscooterparts.com/motors24volt.html (MOT-B24400, about half way down) and www.electricscooterparts.com/MOT-B24400.html. Will this be powerful enough?
TIA!
TIA!
Uhm... A quick read on the first page and its quite off. Look at Velkart they use a AC-50 motor Its a asynchronous motor. There is a lot of AC inverters and although its expensise its still common. Best choice when money is involved is brushed though. There is 3 main types of electric motors. Induction AC, Permamnet magnet AC, and Brushed DC. There is lots of variations of them but those are the three basic types and all will work just fine. Inverters (controllers) are what makes the DC a much better choice!
Mitchelloni
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Hey, I'm just wondering, using this sort of motor, how fast would I be able to go in a go-kart with this sort of specs: http://www.monsterscooterparts.com/36-volt-1000-watt-motor-controller-throttle-kit-standard.html
jman231994
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Make your own thread. You quite likely wont get replied to without doing so.
Russell Hough
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bicycle mod to gas electric generated e-bike using ac
What about using a 120Vac motor with a small gas powered 120Vac 1000 or 2000w gas generator to motorize a bicycle? The Honda gas generator is quite and runs for 9.5 hours on a gallon of gas.
I would have to figure out horse power for AC - you already mentioned horse power for DC - and you mentioned all the differences about AC verses DC - AC being less powerful than DC - and you mentioned the power demand in Watts from start up for DC and I'm sure its the same for AC - could it be done? - would there be enough power to justify this combination?
What about using a 120Vac motor with a small gas powered 120Vac 1000 or 2000w gas generator to motorize a bicycle? The Honda gas generator is quite and runs for 9.5 hours on a gallon of gas.
I would have to figure out horse power for AC - you already mentioned horse power for DC - and you mentioned all the differences about AC verses DC - AC being less powerful than DC - and you mentioned the power demand in Watts from start up for DC and I'm sure its the same for AC - could it be done? - would there be enough power to justify this combination?
It would weigh less to use lipo batteries. And remember the generator will burn more gas under a harder load! You should join endless sphere forums or DIY electric car and read up on AC drive systems!