Auxiliary Power supply - Inverter

[D-ann Perez]

Do I really need to put a transformer on my auxiliary power supply? my input and output voltage are both dc anyway. I just saw an auxiliary power supply for an inverter and it uses a transformer, and dedicated winding for each Power supply, what is the transformer for?

 

[audioguru]

You told us nothing about your "auxiliary" power supply. You did not say its input and output voltages or current and what you use it to power.
A transformer is used to change one AC voltage to another or the same AC voltage and also can be used for isolation.

 

[Mikebits]

You told us nothing about your "auxiliary" power supply. You did not say its input and output voltages or current and what you use it to power.
A transformer is used to change one AC voltage to another or the same AC voltage and also can be used for isolation.

What, your crystal ball not working? I thought it was just me who did not make sense of that.

 

[Mikebits]

Do I really need to put a transformer on my auxiliary power supply? my input and output voltage are both dc anyway. I just saw an auxiliary power supply for an inverter and it uses a transformer, and dedicated winding for each Power supply, what is the transformer for?

This should answer your question about what the transformer is for in an inverter.
https://www.explainthatstuff.com/how-inverters-work.html