Rewinding 230V 1-Phase and Choosing Capacitors
Rewinding 230V 1-Phase and Choosing Capacitors
(OP)
If this is not the right forum for this, please direct me to the right one.
I bought a second hand JET mill with a 230V single phase 2 HP motor. The start coils burned out shortly after I got it home. Seems the start capacitor was bad.
I want to rewind it.
From the data plate:
No brand name. Was on a JET Mill.
Model YN-03-12-06-10-63-01-C800(1)-1-16-3-04-07-7-07
HP 2 RPM 1720
V 115/230 A 30/15
PH 1 POLE 4
HZ 60 EFF 64%
CLASS E HEAT 60ºC
Serial Number JD 774546
DATE 1991
Inside a box on the side, there is provision for reversing the motor, but there is no provision or instruction for switching from 115V to 230V and back again. It seems to be hard wired for 230 only.
There is NO centrifugal switch. There are supposed to be TWO capacitors, which, I take it are to be "start" and "run". The bad capacitor all the lettering was gone, so I have no info about it.
You now know everything I know about the motor.
I need to know the proper type of capacitor for both, their mfd rating, and, I am guessing they would be for any voltage in excess of 200. JET telephone tech support seems to think there is only one capacitor, so I can't trust that.
Only the "start" coils are burned out, so could I get away with replacing just them?
Have read two books on electric motors, but this motor with two capacitors and no centrifugal switch is not covered in either book, neither are there formulae for determining capacitor size in the books.
I bought a second hand JET mill with a 230V single phase 2 HP motor. The start coils burned out shortly after I got it home. Seems the start capacitor was bad.
I want to rewind it.
From the data plate:
No brand name. Was on a JET Mill.
Model YN-03-12-06-10-63-01-C800(1)-1-16-3-04-07-7-07
HP 2 RPM 1720
V 115/230 A 30/15
PH 1 POLE 4
HZ 60 EFF 64%
CLASS E HEAT 60ºC
Serial Number JD 774546
DATE 1991
Inside a box on the side, there is provision for reversing the motor, but there is no provision or instruction for switching from 115V to 230V and back again. It seems to be hard wired for 230 only.
There is NO centrifugal switch. There are supposed to be TWO capacitors, which, I take it are to be "start" and "run". The bad capacitor all the lettering was gone, so I have no info about it.
You now know everything I know about the motor.
I need to know the proper type of capacitor for both, their mfd rating, and, I am guessing they would be for any voltage in excess of 200. JET telephone tech support seems to think there is only one capacitor, so I can't trust that.
Only the "start" coils are burned out, so could I get away with replacing just them?
Have read two books on electric motors, but this motor with two capacitors and no centrifugal switch is not covered in either book, neither are there formulae for determining capacitor size in the books.





RE: Rewinding 230V 1-Phase and Choosing Capacitors
Have you had a look on ebay for a replacement motor? UK ebay has motors galore and you can probably pick up a branded motor (e.g. Leeson or Reliance to name couple even I've heard of) than you will pay for a rewind.
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If we learn from our mistakes I'm getting a great education!
RE: Rewinding 230V 1-Phase and Choosing Capacitors
I am an inveterate tinkerer, who loves to repair just about anything.
Of course, I COULD get really desperate, and pull the START coils, and map them.
Currently, I have a nice Baldor 1 HP doing substitute duty in the mill. Doing well, too. The only reason to fix this is in case I wanted to sell the mill, to buy a smaller one.
RE: Rewinding 230V 1-Phase and Choosing Capacitors
It sounds as if you are not the first one to play with this motor. I see two reasonable courses.
1> Throw that piece of junk out and get back to work.
2> Rewind the start winding yourself if you can find a mid point connections between two run windings. You may be able to use a starter/capacitor combination meant for a 2 ton refrigeration unit.
Any comments on this options itsmoked?
Bill
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"Why not the best?"
Jimmy Carter
RE: Rewinding 230V 1-Phase and Choosing Capacitors
It would be SOOO easy if the motor had a cent switch.
Where's a good place to buy armature wire? Gotta rewire a DC motor, but THAT, I know how to do.
RE: Rewinding 230V 1-Phase and Choosing Capacitors
RE: Rewinding 230V 1-Phase and Choosing Capacitors
I'll consider it.
I'm leaning toward the idea of a surplus motor. It would be $$$, but it would be the least hassle. I'm about $30 into books, already.
Still, if a reader could point me to a website with formulae for these things, it would be nice.
About rewiring the DC motor. It is from a circular saw. I have already replaced the saw, so have nothing to lose.