Auxiliary Power supply - Inverter

audioguru said:

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.

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D-ann Perez said:

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?

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