[Milsurplus] 12v -- 24v Vehicle Power

J. Forster jfor at quik.com
Wed Oct 7 00:28:45 EDT 2009


Close, but not quite.

Since the armatures are common and therefore rotate at the same speed,
they generate the same back EMF. The back EMF cancels out the applied DC
voltage. The forced equality makes the voltages divide equally.

-John

===============


>
> John Forster wrote:
>
>
>
>>You can look at it
>> as a center tapped autotransformer for DC. Very clever, IMO.
>
>
>
>
> Yeah, that's pretty clever. As in, it took me about five minutes of
> thinking about it (including looking up the meaning of "commutator") to
> think I understand what you mean. It seems to me that the key is that the
> two dynomotors can't turn at different speeds when you switch from receive
> to transmit.
>
>
>
> However, as with all things related to miltary radio, I am fully convinced
> that it is completely bitchin'.
>
>
>
> Sean
>
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