Given adjustments for heat, torque, and rpm, yes. (Depends on "ok")
All AC motors are just electromagnets -
they may be designed for an optimum frequency, power, and voltage, but as
motor controllers show, you can run them on just about anything AC, if you
reduce output or otherwise adjust for losses and don't exceed voltage.
Of course, if the adjustments are bad enough, you might end up having to
settle for 1 hp out of a ten hp motor.
check with the mfg.....
It would be happy at 367V but not at 415 as, at the latter voltage the
required flux density would be about 13% high and this would cause
saturation and a high magnetising current. Not desirable.
Voltage proportional to frequency is OK at frequencies below the design
|> Will a 30kw 440v (delta) 60hz motor run ok at 415v 50hz please ?|> Thanks.
| It would be happy at 367V but not at 415 as, at the latter voltage the
| required flux density would be about 13% high and this would cause
| saturation and a high magnetising current. Not desirable.
| Voltage proportional to frequency is OK at frequencies below the design
What's the possibility of running that motor on 480 volts 60 Hz?
| Phil Howard KA9WGN | http://linuxhomepage.com/ http://ham.org/ |
Thanks you for all of your reply's.
The reason I ask is that I have a number of 60Hz 440v Motors ranging from
30kw, 22kw & 18.5Kw for sale.
I have only seen them packed in a container at the moment but I believe
there to be 4x 30s, 3x 22s and 2x 18.5kw.
Any idea on what sort is price I should ask for them and what market to
I believe they where destined for Afghanistan several years back but where
All the motors are brand new and unused.
I presume that if wired through an sutiable Inverter set up they would be ok
for UK use, in the assuption that frequency and voltage could then be
tailored to suit ?
If anyone on here is interested in them then please email me.
They are destined for EBay eventually.
If I were to control a motor with an inverter, I would specifically want an
inverter-duty rated motor. Are yours? I am told US Electric were generally
ok with their motors being controlled by speed drives as long as they were
high efficiency motors, and they had insulation Class F. Do you know if
your motors meet this?
Licking on speed and power, but not on torque at 367V, 50 Hz. Torque will
be determined by the load characteristics and typically full load torque
will not vary much if V/f is constant.
An example 60 Hz 240V 3 phase induction motor has a peak torque of 164Nm
at 1349 rpm
At 50Hz 200 V the peak torque is 160Nm at 1051 rpm but the starting torque
is about 15% higher.
At rated torque the current will be nearly the same in both cases but the
speed will be proportional to frequency.
I looked at one of your motors, and I see "Made in EU" on it. Where is
"EU"? I thought that was Europe, and such a label would mention the
individual country (Germany or whereever). Isn't all of Europe 50 Hz
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