Electrical Energy Conversion

Please refer to the attached file. It contains more than one-page. Please answer at least TWO multiple-choices questions. Explain in-detail why such answers are chosen. It is difficult to answer these non-assignment multiple-choices questions. Please help to work out the detailed step-by-step answers to these non-assignment multiple-choices questions. The detailed step-by-step answers will be helpful for understanding the context of the subject. Please be reminded to answer at least TWO multiple-choices questions.

Electrical Energy Conversion

Please refer to the attached file. It contains more than one-page. Please answer at least ONE multiple-choices questions. Explain in-detail why such answers are chosen. It is difficult to answer these non-assignment multiple-choices questions. Please help to work out the detailed step-by-step answers to these non-assignment multiple-choices questions. The detailed step-by-step answers will be helpful for understanding the context of the subject. Please be reminded to answer at least ONE multiple-choices questions.

Electrical Energy Conversion

Please refer to the attached file. It contains more than one-page. Please answer the multiple-choices question. Explain in-detail why such answer is chosen. It is difficult to answer this non-assignment multiple-choices question. Please help to work out the detailed step-by-step answer to this non-assignment multiple-choices question. The detailed step-by-step answer will be helpful for understanding the context of the subject.

To determine the equivalent winding resistance, percentage regulation, efficiency of a single phase transformer.

A single-phase transformer is rated 100kVA, 2200:440 volts. When carrying rated current with the low voltage terminals short-circuited, the input power was 1.14kW, and the applied voltage 93V rms. (a) Determine the equivalent winding resistance and leakage reactance of the transformer referred to the low voltage side. (b) The primary voltage is adjusted so that the secondary voltage is 440V when the transformer is supplying rated load at a power factor of 0.8 leading. Calculate the primary terminal voltage and the percentage regulation. (c) The transformer consumes 700W under no-load conditions at rated voltage. Determine the value of load current for which the efficiency is maximum... click for more

Transformer Magnetising Current

The primary winding of the transformer considered in question has 1000 turns. The iron core has a cross section of 70cm^2, and a mean path length of 150cm for the magnetic flux within it. The permeability of the iron may be assumed to be 0.0040 henrys per metre. (a) Calculate the maximum flux and flux density in the iron core when a sinusoidal voltage of 2200 volts rms is applied to the primary winding. (b) Calculate the maximum and rms values of the magnetising current.