I would like to know what would happen if a capacitive load is connected to the secondary of a transformer. I simulated the circuit on Proteus. The inductance of the secondary coil was 0.1 H and the frequency of the supply is 50 Hz. The secondary coil produces 15V peak to peak.
I connected a capacitor across the terminals of the secondary coil.
When the capacitive reactance of the load is equal to the inductive reactance of the secondary coil (Resonance at 50 Hz), I found that the voltage is increased to about 50 V peak to peak!! (The value of the capacitor was 100uF or 101uF).
First, I thought that the mistake was in the simulator so I connected a small resistance in series with the capacitor. I tried from 1 ohm to 50 ohm. The voltage was dropped but it was sill higher than 15V peak to peak.
Why resonance increases the voltage?
If I need to increase the voltage, Why should the resonance be at 50 Hz which is the frequency of the supply? Why the voltage does not increase at a frequency of say 2 KHz?
If I made this experiment practically, Will the transformer wear out?
Thank you very much,