Motor Theory......
Motor Theory......
(OP)
question.
lets say I have a 5 hp motor , but I really need a 8 hp ... can I just swap out the stator with a bigger one???? ( assuming the two stators are swapatable)
would that cause any problem???
lets say I have a 5 hp motor , but I really need a 8 hp ... can I just swap out the stator with a bigger one???? ( assuming the two stators are swapatable)
would that cause any problem???





RE: Motor Theory......
RE: Motor Theory......
RE: Motor Theory......
Muthu
www.edison.co.in
RE: Motor Theory......
BTW. The proper motor may be cheaper than the wrong stator for a 5Hp rotor.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Motor Theory......
RE: Motor Theory......
Muthu
www.edison.co.in
RE: Motor Theory......
1 - are they mechanically interchangeable? (outer diameter, bearing seats).
2 - does the rotor / stator slot combination cause problems
3 - is the magnetic design compatible?
4 - As above thermal design for rotor (I^2*R losses)
5 - Characteristics of rotor fan - provides enough cooling for the stator?
6 - Torque speed characteristic is determiend by the manufacturer based on motor and stator together. Are you going to figure out the new torque speed characteristic?
This is the tip of the iceberg. I wouldn't do it in a plant because odds are stacked agasint you. Maybe just for fun but not if you need it to work.
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RE: Motor Theory......
Fe
RE: Motor Theory......
For FeX32, I did not take the OP's response, "well...Rhatcher , what kind of problem do you foreseen" to be bad attitude. It seems natural that if you tell someone not to do something that they will ask why. My boss does it to me all of the time.
And, we should always remember that many of the people who post here speak English as a second language and may respond in a way that seems to show attitude when it is not meant that way.
That being said, I have seen many many examples of regular contributors to this forum showing 'attitude'. For example, a response that begins with 'Fine, whatever...'
RE: Motor Theory......
Fe
RE: Motor Theory......
Not a good assumption. Do a little research on some motor manufacturer's sites. Look at Hps, frame sizes and dimensions.
You may find a 7.5 Hp or 10 Hp, 3575 RPM stator in the same frame size as a 5 Hp, 1775 RPM motor. If it is the same frame size, it may be swappable. But the cost of a replacement rotor at spare parts pricing will probably be much more than a competitively priced complete motor.
I have seen pricing ratios of 4:1 and 5:1 comparing replacement MCC sections with the same equipment priced as a competitive bid.
A $20,000 bid for an MCC section under replacement pricing dropped to $5000 as a competitive bid.
Probably the same situation for motor parts.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Motor Theory......
also, Thanks to electricpete
those are exactly the type of answer that I was looking for, a star for you ...
RE: Motor Theory......
But the stator windings are what determines the power consumption and power output. So putting in a larger rotor in a 5HP motor would not increase the HP capacity of the motor anyway.
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RE: Motor Theory......