# 3 phase 15 hp ac.motor work?

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Would a weinman ac 3 phase 15 HP work for a conversion? (using about 3000 lb vehicle)
Volts 208-230/460 DUTY: CONT rpm 3485 hz 60 fl amp 41.9-36.9/18.45 alternate tasting 46.0/23.0 amps max at 190/380 v

If so special mods? what would a possible approximate top speed be?

Thanks for any tips!!

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#### major

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Could someone explain what i need to look for in the way of hertz?

Hertz = cycles per second. That is the frequency of the source AC power driving the motor. It is the fundamental frequency opposed to the modulation. The speed of the AC motor is proportional to this fundamental frequency and inversely proportional to the number of pole pairs. So a 4 pole motor at 60 Hz has a synchronous speed of 1800 RPM. A 2 pole motor at 60 Hz is 3600 RPM. A 4 pole motor at 50 Hz is 1500 RPM.

All this is well and good to know, but...... You should not build your EV conversion around some arbitrary motor. Especially an AC motor if this is your first EV conversion and if you are not an expert. Very few (less than a percent) of EV conversions go the AC route and most of them use a packaged AC system (motor and controller).

It is a DIY (do it yourself), so I ain't telling you what or how to do anything. Just sayin'

Good luck,

major

#### major

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I assume this is a DC motor. But can somebody explain if this would be a good motor for my first run? 24 V but it says 578 hp! Is this accurate?

24V 2000rpm 26amp 578 hp

Do the math. 24V times 26A = 624 Watts. One hp = 745W. Maybe it is 0.578hp.

What you're looking at is a PM DC motor likely used for power steering pump. You obviously saw my post http://www.diyelectriccar.com/forums/showpost.php?p=306891&postcount=2 I suggest you follow that advice.

Regards,

major

#### major

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Sorry for reviving an old topic, but why you only can overclock a 4 pole motor and not a 2 pole?
If you get a 4 pole motor (1700-1800 RPM), you might be able to connect it for 240 and overclock it to 120 Hz and 480V and get twice the HP. You really can't do that with a two pole motor.
I suppose your question is directed to Paul's comment. Haven't seen him here much lately. But a 2-pole motor would do about 7200RPM at 120Hz. Guess I don't see a problem, necessarily, with that but maybe Paul does.

Regards,

major

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