Unformatted text preview: Comment – the short circuit impedance is important for identifying the transformer parameters. Problem 53 – Short Circuit Impedance At 60 Hz , w hat is the magnitude and phase of the impedance that would be measured at the input to the secondary winding if the primary winding was short-circuited ? Problem 54 – Loaded Transformer A 15 Ω resistance is placed on the secondary of the transformer. The primary voltage is 100 V rms at an angle of zero and is at 60 Hz. In the steady state, at t=5 s, what is the instantaneous voltage across and current into the 15 Ohm resistor ? Problem 55 – Transformer Frequency Response Plot the ratio of the magnitude of the referred secondary voltage to the primary voltage as the frequency is varied from 0.1 Hz to 10 kHz. Use a semi-log scale and assume that the secondary is loaded with a 15 Ω resistor as in problem 54....
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- Spring '08
- Alternating Current, Inductor, Mains electricity, circuit impedance