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- Thread starter jib
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- #2
motorsdirect
Electrical
- Jul 8, 2004
- 78
Hi
First, I would inspect the leads to see if there are any clues at all..sometimes the leads are bought out of the motor in groups of 3... or bound in groups of 3 giving you a hint to either side of your connection block...lets say a1,b1,c1....as one side..and c2,a2,b2..as the other.
Then, using a resistance meter, work out the three windings..there should be three seperate pairs of leads that read to each other!!
if there are no more clues at all..then, i would take an educated guess at the groups of three,,connecting your pairs to a1 & a2, b1 & b2, c1 & c2.
Then I would star the a2,b2,c2 leads..and supply a1,b1 &c1. and run the motor...being careful to listen to the motor when switching on...the only thing left could be reversed phase....if you have this...the motor wont start properly...will growl loudly..so switch it straight back off...then swap over 1 pair of leads at a time( ie...a1 & a2)...then testing again....putting them back as they were if no improvement is made!!!!
There should only be 1 pair that needs to be reversed to make the motor run correctly!!!
Hope this makes sense...
Jeff
First, I would inspect the leads to see if there are any clues at all..sometimes the leads are bought out of the motor in groups of 3... or bound in groups of 3 giving you a hint to either side of your connection block...lets say a1,b1,c1....as one side..and c2,a2,b2..as the other.
Then, using a resistance meter, work out the three windings..there should be three seperate pairs of leads that read to each other!!
if there are no more clues at all..then, i would take an educated guess at the groups of three,,connecting your pairs to a1 & a2, b1 & b2, c1 & c2.
Then I would star the a2,b2,c2 leads..and supply a1,b1 &c1. and run the motor...being careful to listen to the motor when switching on...the only thing left could be reversed phase....if you have this...the motor wont start properly...will growl loudly..so switch it straight back off...then swap over 1 pair of leads at a time( ie...a1 & a2)...then testing again....putting them back as they were if no improvement is made!!!!
There should only be 1 pair that needs to be reversed to make the motor run correctly!!!
Hope this makes sense...
Jeff
- Thread starter
- #3
motorsdirect
Electrical
- Jul 8, 2004
- 78
Hi Joe.
You could start by looking at Mark Empsons web site:
If this is not enough for you...I have a very old but good book called 'ELECTRIC MOTOR REPAIR' its by Robert Rosenberg + August Hand...and is published by 'HRW'...whcich stands for HOLT, RINEHART AND WINSTON.
hope this helps
Jeff
You could start by looking at Mark Empsons web site:
If this is not enough for you...I have a very old but good book called 'ELECTRIC MOTOR REPAIR' its by Robert Rosenberg + August Hand...and is published by 'HRW'...whcich stands for HOLT, RINEHART AND WINSTON.
hope this helps
Jeff
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- #5
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