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  #1  
Old 11-13-2012, 08:35 PM
thatdood thatdood is offline
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Default AC motor for heavy vehicle?

Anyone know of any AC motors for heavy vehicles such as vans, SUVs, maybe even a U-Haul truck? I was looking at this one http://hpevs.com/catalog-ac-75.htm but I'm afraid it would not provide enough power. Most motors seem to be made for small lightweight vehicles, not heavy ones.

I know about the disadvantages of using heavy vehicles, but besides that does anyone know of a reasonably priced AC motor for something like a 6,000 pound van?
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Old 11-13-2012, 09:03 PM
StanSimmons StanSimmons is offline
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Default Re: AC motor for heavy vehicle?

Maybe HPEVS could make a Siamese version of the AC75. Rumor has it that they are already working on a Siamese version of one of their smaller motors.
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Old 11-14-2012, 04:04 AM
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Default Re: AC motor for heavy vehicle?

If you are looking for a big Motor check out these links.
Not cheap 5k for the motor plus controller.

http://topekaelectricmotor.com/files...Curtis-123.jpg

http://topekaelectricmotor.com/elect...les/ac-project

Kevin is running a full size pickup plus weight hauling motors.

With some hard work DIY, build your own.
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Old 11-14-2012, 04:49 AM
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Default Re: AC motor for heavy vehicle?

I think the motor would be the smaller half of your problem with a 6,000Lb van. The pack will be impressive and costly.

Kevin is using 64 Hipower LiFePO4 200 amp hour cells. The truck weighs 5,945 lbs, which is in your design weight.

At an approximate cost of $1.25/AH, like CALB's, it would cost $16,000 + shipping.

Plan for that too.

Miz
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Old 11-14-2012, 12:26 PM
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Default Re: AC motor for heavy vehicle?

I agree that batteries will be the bigger problem

If weight doesn't bother you, there are all sorts of heavy industrial motors you can use.

I use a 30 HP 6 pole industrial induction motor in my extended van. It's 440 lbs. The motor and industrial controller (yes it's been replaced and is working) work fine, it's just the batteries that don't perform very well
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Old 11-14-2012, 04:15 PM
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Default Re: AC motor for heavy vehicle?

I'd say you could use a much smaller industrial motor.

You can get a decent copper rotor IM from SEW. I hear the 7.5kW 65kg motor (~140lbs) can put out about 70kW no problems.
You could of course go upto a 11kW-15kW to get much higher output but they weigh about 100kg (220lbs).
I wouldn't personally go above a 160 frame.
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Old 11-14-2012, 04:49 PM
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Default Re: AC motor for heavy vehicle?

Quote:
Originally Posted by Stiive View Post
I'd say you could use a much smaller industrial motor.

You can get a decent copper rotor IM from SEW. I hear the 7.5kW 65kg motor (~140lbs) can put out about 70kW no problems.
You could of course go upto a 11kW-15kW to get much higher output but they weigh about 100kg (220lbs).
I wouldn't personally go above a 160 frame.
Infact, the first motor that my van used for road driving was 11 kW 160 frame.

I'd imagine it would be perfect if used with a gearbox/transmission to give a little more low end torque
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Old 11-14-2012, 04:56 PM
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Default Re: AC motor for heavy vehicle?

Quote:
Originally Posted by subcooledheatpump View Post
Infact, the first motor that my van used for road driving was 11 kW 160 frame.

I'd imagine it would be perfect if used with a gearbox/transmission to give a little more low end torque
Was it slow? Are you using vector control?
How much power are you getting out of the 6-pole? Perhaps both were limited by battery power, but the 6-pole just gives you more torque for the same gear reduction.

That 30hp motor would be a beast
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Old 11-14-2012, 05:08 PM
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Default Re: AC motor for heavy vehicle?

Yeah it's mainly for torque that I went for the 30 HP 6 pole. The 11 kW motor wasn't too bad but the van wasn't really fast like it is now with the 30 HP.

The 11 kW motor was 6 poles, and it would saturate at 4x nominal current, (about 76 amps) so I could get ( I assume ) 4x nominal torque, which was only 262.2 ft lbs/ 355.5 nm

The 22 kW 6 pole motor I use now I've seen use current as high as 106 amps, so on paper I get 385 ft lbs / 521 nm

Like I say these numbers aren't verified, but the van sure feels alot faster with the bigger motor

Whats more, I wasn't using vector or DTC with the 11 kW motor, I was still using my modified PWM drive which blew due to my abuse. I just used as much torque boost as I could. The resulting overvoltages during regen took their toll on my old used IGBTs and they eventually went out with a bang

With DTC the 11 kW probably could do more, not sure how much though. It got pretty warm a few times
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Old 11-14-2012, 05:13 PM
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Default Re: AC motor for heavy vehicle?

Quote:
Originally Posted by subcooledheatpump View Post
Whats more, I wasn't using vector or DTC with the 11 kW motor, I was still using my modified PWM drive which blew due to my abuse. I just used as much torque boost as I could. The resulting overvoltages during regen took their toll on my old used IGBTs and they eventually went out with a bang

With DTC the 11 kW probably could do more, not sure how much though. It got pretty warm a few times
Yeh i'd imagine with vector control it'd be a bit faster off the line. Especially if your over saturating the motor, a significant amount of your current could be going to fluxing the motor rather than producing torque.
Vector control wouldn't do much for peak HP though.
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