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View Poll Results: Are you interested in the proposed AC system?
Yes 21 63.64%
No 12 36.36%
Voters: 33. You may not vote on this poll

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  #11  
Old 06-29-2012, 12:01 PM
ruckus ruckus is offline
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Default Re: New AC motor system from HPEVS

Quote:
Originally Posted by JRP3 View Post
I don't know where this got off the rails with a dual motor direct drive system. This is meant to be used with a transmission or at least a gear reduction, just like all the other HPEVS systems. Let's try to stay somewhat on topic.
Golly, sorry. Without a working picture, and all the posts talking about direct drive, that seemed like what the product was.

Ok, so now that I understand the proposal, I have a different critique.

1. Why buy two controllers? Where is the advantage in that? (unless they are very unreliable).
2. 190ftlbs is still awfully weak in today's market and ESPECIALLY considering...
3. You can buy 3x the motor for 2/3 the price elsewhere.

I just don't see any advantage to low-voltage AC. High-voltage, yes... IF the price comes down to reasonable ($5-7,000 for motor and controller).

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  #12  
Old 06-29-2012, 12:25 PM
Yukon_Shane Yukon_Shane is offline
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Default Re: New AC motor system from HPEVS

This new design is definately interesting but the price is too high to make me seriously consider it; not when you can buy a warp 9/kostov and a soliton junior combo for under $4k.

The extra $5k for this system would buy alot of batteries...
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  #13  
Old 06-29-2012, 03:45 PM
kerrymann kerrymann is offline
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Default Re: New AC motor system from HPEVS

I would be interested but at a price point is too high. 6-7k yes but 9k just doesn't give the price performance ratio.
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  #14  
Old 06-29-2012, 04:00 PM
somanywelps somanywelps is offline
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Default Re: New AC motor system from HPEVS

Quote:
Originally Posted by ruckus View Post
As others pointed out, 1500rpm is the max needed (good for over 110mph!!). 4500rpm is just plain ridiculous and shows he hasn't even done the basic math or doesn't understand the mechanical components and forces required to make a car go.
Differential gear down....
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  #15  
Old 06-29-2012, 04:03 PM
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JRP3 JRP3 is offline
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Default Re: New AC motor system from HPEVS

Quote:
Originally Posted by ruckus View Post
Golly, sorry. Without a working picture, and all the posts talking about direct drive, that seemed like what the product was.
I did provide a working link.
To your questions:
Quote:
1. Why buy two controllers? Where is the advantage in that? (unless they are very unreliable).
This is essentially two motors in one housing, the Curtis AC controllers, which seem very reliable, are limited to 144V and 500 amps, so you need two to get enough power.
Quote:
2. 190ftlbs is still awfully weak in today's market
It's almost twice what the popular AC50 provides
Quote:
3. You can buy 3x the motor for 2/3 the price elsewhere.
The jury is still out on that if you are talking about an AC system, but if it's true then yes that's a good point.
Quote:
I just don't see any advantage to low-voltage AC
Easier to configure and manage a pack.

Obviously this is not an ideal setup, but I guess HPEVS has not found an affordable controller other than the Curtis that works with their motors.
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