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#170462 - 11/03/07 06:25 PM dual voltage motor solution  
MMK  Offline
Member
Joined: Nov 2007
Posts: 20
Ireland
Hello,
Wonder if anyone has any good suggestions? I want to find a motor for one of our machines that will work worldwide. I.e. be suitable for the American and European voltages (110VAC/230vAc). Motor power is 1/3HP(250W) approx. Driving an augur screw, material conveying. I know you can get dual voltage single phase AC motors. Is there any other solution, perhaps using a 3ph motor and some drive/converter that could cope with single phase 110 or 230vac?
All suggestions welcome,
Michael.


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#170468 - 11/03/07 07:37 PM Re: dual voltage motor solution [Re: MMK]  
LarryC  Offline
Member
Joined: Jul 2004
Posts: 781
Winchester, NH, US
Does it matter if the motor changes speeds when run on 60 Hz vs. 50 Hz? If not, then a 115/230V motor should work. It will probably be warmer when running on 50 Hz than 60. It won't be the most efficient motor, but it should run.

Larry


#170489 - 11/04/07 12:01 PM Re: dual voltage motor solution [Re: LarryC]  
MMK  Offline
Member
Joined: Nov 2007
Posts: 20
Ireland
Hi Larry,
I think we can cope with the speed difference. Any suggestions on motors to choose from? Also, any suggestions on how to do the current trip? I dont want to have to use differing trip ratings for the American and European machines, but cannot think of a way around this?
Michael.


#170563 - 11/05/07 10:21 PM Re: dual voltage motor solution [Re: MMK]  
LarryC  Offline
Member
Joined: Jul 2004
Posts: 781
Winchester, NH, US
What is the mechanical load like? Does the motor see a constant torque like a reducing gear box? Does the load start out as a stalled load like an air compressor starting up against a pressurized tank? Does the mechanical load take a long time to come up to speed? Will the mechanical load backdrive the motor?

What kind of duty cycle will the motor see? What kind of environment will the motor be in? Constant high or low temperatures, wet or dry, dusty, high vibration, run to fail or preventative maintenance, external or internal fan cooled.

What horse power range? 1/4, 1/2, 1, 3, 5 HP?

Details help. smile


#170841 - 11/13/07 04:37 PM Re: dual voltage motor solution [Re: LarryC]  
MMK  Offline
Member
Joined: Nov 2007
Posts: 20
Ireland
Larry,
Here are some more details on motor and application:
Motor = 1/3HP approx.
Will have gearbox, most likely RA, final o/p rpm = 80-100rpm.
100% duty cycle....almost.
Factory environment. fairly benign.
Driving an augur screw, churning up granules, reasonably high starting torque required.
Hope this helps,
Michael.



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