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Electrical_Power_Drivers-_ET3026WB-Chapt21_example_questions

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Unformatted text preview: W 21‐9 (output voltage) The chopper shown below is connected to a 3000V dc source. The chopper frequency is 50Hz and the on‐ time is 1ms. What is the voltage across R0? a) 60V b) 150V c) 50V d) 1500V 21‐9 (output current) The chopper shown below is connected to a 3000V dc source. The chopper frequency is 50Hz and the on‐ time is 1ms. What is the value of Ιο and Is if R0=2Ω? a) Io = 3Α and Is = 0.15A b) Io=75Α and Is=3.75A c) Io=25A and Is=1.25A d) Io=750A and Is=37.5A 21‐15 (frequency) The chopper shown below is connected to a 2000V dc source and the load resistor R0 has a value of 0.15Ω. The on time is fixed at 100μs and the dc voltage across the resistor is 60V. What is the switching frequency f? a) 3...
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