> Just that the market for general standard types is low.

> I have seen special designs used, in the french Pellenc electric
> (what is the word for: tool to cut parts of trees and bushes) the
> motor fit in the handle, on your back you carry 24V NiMH and motor
> driver
>
> Ideas:
>
> 1) If only a few needed, you can go to a motor repair shop and let
> them (re) wind one for you.  Maybe they can even reconnect windings
> for lower voltage without making new winding.

> Hi guys
>
> I am working in a speed controller using a PIC for a three-phase
> induction motor.
>
> I would like to have low voltage (48V, 24V, 12V) 3-phase motors, but I
> could not find it. Is there any technical problem of building such low
> voltage 3-phase motor?
>
> Rodrigo
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>

>
>
>
> Ivan Kocher
> -------------
>
> Rodrigo Real wrote:
>> Hi guys
>> I am working in a speed controller using a PIC for a three-phase
>> induction motor.
>> I would like to have low voltage (48V, 24V, 12V) 3-phase motors, but
>> I
>> could not find it. Is there any technical problem of building such low
>> voltage 3-phase motor?
>> Rodrigo
>> _______________________________________________
>> http://www.piclist.com
>> View/change your membership options at
>> mailman.mit.edu/mailman/listinfo/piclist
>>
>
> _______________________________________________
> http://www.piclist.com
> View/change your membership options at
> mailman.mit.edu/mailman/listinfo/piclist

> Ivan Kocher <EraseMEikocherspam_OUTTakeThisOuTice.co.cr> writes:
>
>
>>If you __really__ need a 12/24/48 volt motor, use a regular 110 or 220
>>motor and a tri-phase transformer the will step-up from your voltaje
>>to the motor's voltaje.
>>
>>Remember, a tri-phase transformer can be built as three separate
>>single phase transformers, which you can buy "easy" or mae yourself.
>
>
> This can be a good idea, the main problem that I have is that I work
> with batteries, so high voltages sometimes are not very easy to
> obtain in the physical space we have.
>
>
>>I think that the problem you are tring to solve is the high currents
>>involved in you system... with this you get the motor power and the
>>high driving currents.
>
>
> This is a real problem I have, specially with the DC motor controllers.
>
> Rodrigo
>

>>I talked to a guy who works in a place like this, and he told me that
>>maybe I would have problems with the conductors of the rotor, he said
>>that it probably should be recalculated. I don't know if this is true,
>>I am mostly a computers guy, but it seemed to make sense to me.
>
> Not terribly hard:
> Stupid example: if you today have windings 100 turns 440V 1 A, you can take the same wiretype, ten in parralell, ten turns, achieving 44V 10A spec.
>
> Small parralell wires have lower loss than one big wire of same total area due to induced current loops inside conductor.  (What is the english term?)
>