DC Treadmill Motor
DC Treadmill Motor
(OP)
What effect will increasing the wire guage have upon a DC (140-180 Volt) perm magnet motor?
Our rewinding shop did the above job, but guage changed from .67mm to .75mm. They now have the treadmill back, it seems as tho the motor does not have enough HP. It struggles to get up to speed, or take load, without tripping internal c/board o/l. Also once 130 VDC and above applied direct to motor , motor comm/brushes spark.
Will change in guage effect HP and would it have these characteristics?
Our rewinding shop did the above job, but guage changed from .67mm to .75mm. They now have the treadmill back, it seems as tho the motor does not have enough HP. It struggles to get up to speed, or take load, without tripping internal c/board o/l. Also once 130 VDC and above applied direct to motor , motor comm/brushes spark.
Will change in guage effect HP and would it have these characteristics?





RE: DC Treadmill Motor
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: DC Treadmill Motor
With the larger wire you probably have fewer turns. larger wire and the same number of turns would reduce losses and improve speed regulation BUT with larger wire it won't fit. You can't get enough turns in the space available.
respectfully
RE: DC Treadmill Motor
He did say it was hard to wind. I am amazed that he didnt think it was the wrong gauge.
SO the effects of the larger gauge, same turns? Will the motor lose HP? Mentioned was the motor losses would be lower, hence improved performance?
RE: DC Treadmill Motor
Do not run the motor again and get your rewind company to rewind the "rewind" with the original and correct size wire and the problems will be solved. Incidently they have gone up 2 sizes, after 0.67mm comes 0.71mm then 0.75mm..... I am not surprised he found it difficult to rewind.
RE: DC Treadmill Motor
1. If a better grade of slot insulation and wire insulation (requiring lesser thickness/cover) is used. This is fine and results in a cooler machine. I do it all the time.
2. By reducing the no. of turns - This is a no-no unless it is done with corresponding reduction in the rated voltage.
I think your rewinder goofed up on the turns despite his claims.
*Why a man thinks he outrun a chasing dog when it has twice as many legs?*
RE: DC Treadmill Motor
These motors tend to be real cheap at surplus places.
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Andre' B.
RE: DC Treadmill Motor
respectfully