Why do you have to use an Isolation Transformer when hooking up Gyros use to electronic circuits?
The Gyro will send out a AC signal that connects to an Isolation Transformers that connects to a Demodulator circuit to demodulate and convert the AC a to DC signal
But I don't understand why you need the Isolation Transformer? any reason why?
If the gyros are like the old syncro/resolver types the IC guys worked with when I was in the Navy the 'Isolation Transformer' is needed for galvanic isolation so the only signal path from the gyro is via a magnetic field generated from the difference in potential between the two/three lines from the gyro feeding the transformer (common-mode signal rejection). As another member said you have to break any possible ground loop as the actual voltage from 'ground' to the Gryo could be much greater than the level of the output signal generated. The transformer serves as an impedance match and/or if its a https://en.wikipedia.org/wiki/Scott-T_transformer then it's 3/2 phase converter.
galvanic isolation so the only signal path from the gyro is via a magnetic field generated from the difference in potential between the two/three lines from the gyro feeding the transformer (common-mode signal rejection).
Because the Gyro and the signal receiver depend on a precise balance of differential (floating/isolated from ground) AC signals and sources, any current path other than the desired ground isolated wiring (including leakage currents, capacitive coupling or noise that flows to ground) must be eliminated or reduced to the lowest level possible.