Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Why use Isolation Transformers to Connect Gyro motor?

Status
Not open for further replies.
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?
 
Isolation transformers are used to provide..... well, ... isolation.

There can be any number of reasons, but often they are used to eliminate ground loops.
 
Any other reasons? is it to clean up motor noise or electronic noise, harmonics from coming into the circuit?

Why is it isolated? i don't get it
 
Without knowing the details of what you are referring to, one can only guess with maybe's.

Any answer we can give can only be as accurate and/or complete as the information you give us.
 
Any other reasons? is it to clean up motor noise or electronic noise, harmonics from coming into the circuit?

Why is it isolated? i don't get it

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.

https://www.ddc-web.com/documents/synhdbk.pdf
 
Last edited:
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).

Yes some Gyros use 2 wires and others use 3 wires , but they are AC signals not a magnetic field

So what is this galvanic isolation?

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.

Why would the Gryo cause a ground loop? how would it happen?
 
Yes some Gyros use 2 wires and others use 3 wires , but they are AC signals not a magnetic field

So what is this galvanic isolation?



Why would the Gryo cause a ground loop? how would it happen?

The AC signal is transfered in the transformer by magnetic fields as there is no physical connection from the primary to secondary windings.
https://en.wikipedia.org/wiki/Galvanic_isolation

Galvanic isolation is used where two or more electric circuits must communicate, but their grounds may be at different potentials. It is an effective method of breaking ground loops by preventing unwanted current from flowing between two units sharing a ground conductor. Galvanic isolation is also used for safety, preventing accidental current from reaching ground through a person's body.

02496.png

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.
 
Last edited:
So the Gyro's AC output is Floating? even if the Gyros is a 2 wire or 3 wire its still a floating AC output?

Yes, if the output is a syncro/resolver signal.
 
Status
Not open for further replies.

Latest threads

New Articles From Microcontroller Tips

Back
Top