[simpits-tech] Driving Resolvers

[Marv De Beque]

That sounds like it is the resolver part of the ADI.  The resolver is 
used to precisely measure the angular position of a shaft.  You are 
right about the method of powering the resolver.

I don't know what they use in the ADI to actually drive the ADI 
movement, but it is probably some form of DC motor that is monitored by 
the resolver - my guess.  Maybe it is an all-in-one type thing.  I need 
to do some more research.

Marv

On Thursday, April 4, 2002, at 09:36 PM, Ken Trager wrote:

> You are right - My synchros in the ADI are three wire windings
> and you can not just vary the magnitude and the polarity
> of the current to make the needle point anywhere on the dial!
>
> You need to use 28 Volt 3 phase 400 CPS and change the phase alingment
> between the three phases to move the synchros -
> They are called transolvers two 2 wire wound stators 90 degress offset
> and a 3 wire wound rotor. The Stator is powered by 26 volts and the 
> rotor
> is powered by 11.8 volts - all 400 cps power.
>
> My two cents
>
> Ken Trager
>
>> Maybe the devices used in aviation instruments are
>> different but I thought that synchros were actually
>> differential transformers that either generate 3
>> phases (for a transmitter) or need 3 phases to drive
>> them (for a receiver).
>>
>
>
>
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