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Generators & Motors General Discussion Antique Generators, Light Plants and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Motors General Discussion

How to rewind a starter armature?


We are using a 24v starter motor to drive an anchor winch. It lasted about 8 years then burned up....

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  #1  
Old 07-30-2010, 06:10 PM
yachtwork yachtwork is offline
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Default How to rewind a starter armature?

We are using a 24v starter motor to drive an anchor winch. It lasted about 8 years then burned up. The armature is cooked and I need to rewind it. Anybody know of a link to instructions on rewinding a starter armature? Maybe some quick tips? I'm the ships engineer and pretty handy and have re-wound alternators in the past. The winch maker is out of business and were in French Polynesia where getting anything done is a real challange thus I'm happy to do it myself.

Looking for ideas.

Scott

---------- Post added at 05:10 PM ---------- Previous post was at 05:07 PM ----------

By the way this is a reversable starter motor. We reverse polarity and the winch changes direction.

Scott
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Old 07-30-2010, 07:33 PM
K D Redd K D Redd is offline
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Default Re: How to rewind a starter armature?

If you reverse polarity and the winch/motor reverses, the field for this motor must be permanent magnet. This make me think of the small 12 volt starters used on small engines. Most but not all of these starter use a permanent magnet field.
I have also reworked a 12 volt starter used on 60's and 70's Chrysler vehicals as winch motors. These are also a 12 volt motor BUT they have a wound field. What makes them easier to reverse than most starter motor is, the armature winding and all of the field coils are in series. It is easy to modify the internal connection of the field coil and use four relays to reverse the motor. Two relays are used in each rotational direction.
I never have rewound anything. I let a shop who specialise in this work do it, but where you are at YOU do not have much choice.

Kent
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Old 07-30-2010, 08:24 PM
Jim Rankin Jim Rankin is offline
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Default Re: How to rewind a starter armature?

The main thing to do is carefully disassemble it so you know how to wind it again! Once you take all the windings off, if you aren't sure then, you're sunk!

Then you need a source of "magnet wire", "fish paper" and "varnish".
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Old 07-30-2010, 11:14 PM
Trevor A Cole Trevor A Cole is offline
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Default Re: How to rewind a starter armature?

You have picked one of the most difficult things to rewind. It's not the technology but rather the physical difficulty of winding it even if you have a source of wire given the wire is probably rectangular section. If the windings were welded to the commutator bars originally you will have great difficulty reproducing the robustness of that. How about telling us with words and pictures what you have got to start with and we may be better able to give good sound advice. Why did it last 8 years then burn out? Is it a factory built item or home grown? From a safety point of view a new anchor winch seems like a good investment to me.
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Old 07-31-2010, 03:04 AM
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John Newman, Jr. John Newman, Jr. is offline
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Default Re: How to rewind a starter armature?

Is it possible to find an old junked forklift truck with a usable motor in it. Would surely take a bit of custom engineering, but you sound like a resourceful sort of person.
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Old 07-31-2010, 04:40 AM
armandh armandh is offline
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Default Re: How to rewind a starter armature?

the winch company may have gone out of business but what about the starter motor manufacturer.

also a possibility that a good auto parts store might know of a good rewind shop
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Old 08-01-2010, 05:03 PM
yachtwork yachtwork is offline
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Default Re: How to rewind a starter armature?

Thanks for the help. Since posting I have done some more work. It seems the winch maker does not make the winch any more, nor the motor. There are a bunch of 24v winch motors that won't fit, but by th time I try and rewind the armature I think I'm going to be better off ordering a basic winch motor and modifying the mount to fit this winch.

I did see the motor says it "tractional friction" type that I am still trying to figure out, and it's compound wound.

I also notice a regular starter motor armature somunitator has spaces about 3/16" each copper strip that the brush rides on. This aramture has about 3 times as many spaces. Very fine work. I don't think I could fix it even if I had the parts and time.

Also it looks like there was a brake on the back of the motor that might have failed and that is what caused the winch to lock up and burn up. Since the winch has a worm gear in it I think I can leave the break behind.

Anchor windlass failure


The anchor windlass motor burned up.


Kind of on the spot.


Anybody know what winch or motor this is? I need to know as I have to buy a new motor.


Dumping all our 300ft of 1/2" chain into the rocky bottom.


By the way this winch and motor are French by Leroy Somer. They have since given up on winch making.
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Old 08-01-2010, 06:08 PM
Wayne 440 Wayne 440 is offline
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Default Re: How to rewind a starter armature?

Leroy-Somer is a division of Emerson. According to their website, they still make DC "brake motors" for mooring windlass/anchor applications. Of course, one should not always believe everything seen on a webpage.
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Old 08-01-2010, 06:56 PM
Rich Mc Rich Mc is offline
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Default Re: How to rewind a starter armature?

Ramsey automotive winches are available in 24 volt units, maybe you could get the motor only as a repair part.

http://www.ramsey.com/
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Old 08-01-2010, 11:23 PM
yachtwork yachtwork is offline
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Default Re: How to rewind a starter armature?

Great info on this site. Thanks for all the help. I learned a lot in the last couple days. One thing is just getting the name of the part I need.

Thanks again to all the respondents.

Scott
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