Subject: Re: Alternator rewinding info needed...(Mr.Wolf)

From: [email-masked] (Jean Parent)
Date: Wed, 24 May 1995 06:22:08 GMT

Peter Wolfs ([email-masked]) writes:
>>I want to rewind some alternators for a different voltage (12 to 48).
>>Somewhere I have seen info offered about how to do this, but don't
>>remember where...  Can anybody help?
>>
>>Thanks!
>>
>>am
>>Alternator rewinding info needed.....
> 
> This is fairly easy. Assume 12V rewound as 48V
> 
> 1. Identify exactly how your alternator stator is wound, i.e. how many
> stator coils, how they are interconnected, turns per coil and wire cross
> section.
> 
> 2. Rewind with exactly 4 times the number of turns and 1/4 the wire cross
> sectional area ( that is half diameter ) to increase the stator voltage 4
> times.
> 

Hi

It's not supose to be the number of poles who done the difference in the
voltage ???

J.Parent

> 4. Replace rectifier diodes with 4 times voltage rating 1/4 current rating
> devices.
> 
> The rotor presents more choices, either
> 
> 1. Use a permanent magnet rotor which requires no changes
> 
> 2. Use 12 rotor with 12 V excitation
> 
> 3. Rewind the rotor to 48Vdc by increasing turns by four times, using 1/4
> cross sectional area wire. This will require a regulator redesign for 48V -
> how easy this is depends on your electronics capability.
> 
> Dr. Peter J. Wolfs                      [=---=]
> Electrical Engineering                    \o/
> Central Queensland University              X
> Rockhampton M.C. 4702                     / \
> Australia
> Tel +61 79 30 9599
> Fax +61 79 30 9382
> 
> 
> Re: Alternator rewinding info needed.....