Over speed Pmac motor (also a.c. induction)

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Inwo   10 kW

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Over speed Pmac motor (also a.c. induction)

Post by Inwo » Sep 21 2019 11:18pm

I have a motenergy 3031 Pmac. Rated at 5,000 rpm max.
Is one of the limiting factors heat? Or can it be programmed to run cooler, at reduced power.
Motor is over double hp needed.
A buddy has run it 7000rpm and it survived. The only issue is 100C after a few fast miles.
I've been told that the heat is from pushing rpm over design limit. Can this be compensated for, or is a gear change required?

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Inwo   10 kW

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Re: Over speed Pmac motor (also a.c. induction)

Post by Inwo » Sep 21 2019 11:24pm

Also testing induction motors. 5kw running oem 48v and 7000rpm max.
I would like to squeeze another 20% rpm out of it.
Do I have a better shot pushing the a.c. motor to 8000rpm, than the Pmac running cool at 7000? (and not grenading)

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Inwo   10 kW

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Re: Over speed Pmac motor (also a.c. induction)

Post by Inwo » Sep 24 2019 12:44am

Let's try it this way.

Will raising the voltage of an a.c. induction traction motor raise the speed of best efficiency.
I need to get a me3031 running cool at over 5000rpm or change gear ratio

Archer321   10 W

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Re: Over speed Pmac motor (also a.c. induction)

Post by Archer321 » Sep 28 2019 6:09pm

If your pmac is more powerful than you need but running too low a speed, you should be able to increase the speed and lower the overall power of the motor by increasing the airgap between the stator and rotor. Not too hard on an axial flux motor, more difficult on a radial flux
Not sure which type yours is.

I have done this on a Heinzman PMS 120.

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Inwo   10 kW

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Re: Over speed Pmac motor (also a.c. induction)

Post by Inwo » Sep 30 2019 8:37am

Motor will run 7000rpm.
Runs hot at any speed.
It runs extremely hot over 4000.

Have had 3 companies, 4 actually counting motenergy, try to get this motor running properly.
We have it 80% there except for overheating.
I would give a motor to someone who can help. It is a dana/spicer type, 19spline , transaxle mount motor. An endplate or donor transaxle is needed for testing. Or go on line with a running car in Ca.
30-31001-AE Drawing.pdf
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motenergy 3031
Last edited by Inwo on Sep 30 2019 8:55am, edited 2 times in total.

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Inwo   10 kW

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Posts: 641
Joined: Dec 13 2016 12:01pm
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Re: Over speed Pmac motor (also a.c. induction)

Post by Inwo » Sep 30 2019 8:46am

From electricgod post:

viewtopic.php?f=35&t=99008&p=1457214&hi ... 1#p1457214
And then BIG...a Motenergy 3031-001 axial flux 80kw motor next to the AP 12090. It has two 180mm wide and 76mm tall stators. It makes a motor 2X more powerful than the C80100 look tiny. No surprises since it's 8X more powerful than the 12090.

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