1. During turn-on and turn-off of a power transistor supplying a resistive load, thevoltage and current variations are as shown in the figure below as idealized linearchanges with time, where the V is off-state voltage and I is on-state current.Determine the mean switching power-loss due to switching at a frequency of 10 kHz.300 V- 200 A200 A--300 V1 us Time2 us TimeTurn-onTurn-off2. A single-phase single-diode (half wave) rectifier is connected to a 240 V, 50 Hz ACsupply. Neglecting the diode volt drop, derive the instantaneous load current equation,determine the current waveform, mean load voltage, and the mean load current for aload ofa. Pure resistor of 5 Ohmb. An inductance of 0.1 H in series with 10 Ohm resistor. (clue : B = 265° or14.72 ms)3. A single-phase full bridge fully controlled thyristor rectifier ( a = 45° ) is supplied bygrid (supply) voltage of V, = 220 V (rms value). Assume that the load is representedby a constant de (flat) current, Ia = 10 A. The grid frequency is equal to 50 Hz.a. Sketch the output dc voltage va(t). Derive the equation for the average devoltage.b. Obtain average and rms value of a thyristor current, and PRV Peak ReverseVoltage of it.c. Calculate input active power, apparent power and power factor.%3D

Note: As per our policy, I have attempted the first question. Given data: fSW=10 kHz

1. During turn-on and turn-off of a power transistor supplying a resistive load, the voltage and current variations are as shown in the figure below as idealized linear changes with time, where the V is off-state voltage and I is on-state current. Determine the mean switching power-loss due to switching at a frequency of 10 kHz. 300 V- 200 A 200 A 300 V 1 us Time 2 us Time Turn-on Turn-off

1. During turn-on and turn-off of a power transistor supplying a resistive load, the voltage and current variations are as shown in the figure below as idealized linear changes with time, where the V is off-state voltage and I is on-state current. Determine the mean switching power-loss due to switching at a frequency of 10 kHz. 300 V- 200 A 200 A 300 V 1 us Time 2 us Time Turn-on Turn-off

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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1. During turn-on and turn-off of a power transistor supplying a resistive load, the voltage and current variations are as shown in the figure below as idealized linear changes with time, where the V is off-state voltage and I is on-state current. Determine the mean switching power-loss due to switching at a frequency of 10 kHz. 300 V- - 200 A 200 A -300 V 1 us Time 2 us Time Turn-on Turn-off
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Part 1) Consider a step down converter with a resistive load. It is supplied by a DC power source of magnitude Vs = 160 V. The switching period is 0.25 ms and the duty cycle k is first set to 0.5. The load is resistive with R=10 Ohms. The critical value of L and the critical value of C are equal to: a. 0.625mH and 0.392uF b. 0.625mH and 0.196uF c. 0.312mH and 0.196uF d. None of these Part2) Now consider the same given but the load is an inductive load with R=10 Ohms and L=10 mH. The switch is ideal. Calculate The RMS load current Io and the RMS converter current Ir are equal to: Select one: a. 5A and 3.54A b. None of these c. 8A and 5.66A d. 12.5A and 8.84A
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