Answer Happy

1. Compare the following semiconductor devices based on their rating, turn on, turn off and other unique criteria: 2. For each of the following application, choose the best power switches and reason out why. a. An inverter for the light-rail train (LRT) locomotive operating from a DC supply of 750 V. The locomotive is rated at 150 kW. The induction motor is to run from standstill up to 200 Hz, with power switches' frequencies up to 10 kHz. b. A switch-mode power supply (SMPS) for remote telecommunication equipment is to be developed. The input voltage is obtained from a photovoltaic array that produces a maximum output voltage of 100 V and a minimum current of 200 A. The switching frequency should be higher than 100 kHz. Power diode and thyristor GTO and IGCT BJT and MOSFET IGBT and IGCT c. A HVDC transmission system transmitting power of 300 MW from one ac system to another ac system both operating at 50 Hz, and the DC link voltage operating at 2.0 kV. 3. Give the main losses in power switches briefly explaining one of the losses. 4. Justify the importance of power electronics in energy crisis or environment issues. 5. Choose ONE of the following renewable energy and discuss its' principle of operation, advantages or strength, disadvantages or weaknesses, and possible converter(s) to be used considering your users are using AC load: Water Solar Biomass - . Wave Wind Geothermal