Q2) A three-phase half-wave converter in Fig.2 is operated from a three phase Y-connected= 10 2. If it is required to obtain an208V, 60-Hz supply and the load resistance is Raverage output voltage of 50% of the maximum possible output voltage, calculate:(a) The delay angle a & draw the output voltage(b) The rms and average output voltage & currents.(c) the average and rms thyristor currents.(d) the rectification efficiency.VanVenybnmbT₂T3Fig.2R7

Answered: Q2) A three-phase half-wave converter…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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A single-phase full-wave converter in the figure below is supplied with a 120-V, 60-Hz source. The load is highly inductive and the load current is continuous and free of ripples. The electromotive force is neglected (E = 0) and the resistance has a value of R = 10 2. The average output voltage is 85% of the maximum possible average output voltage. The delay angle would be equal to: Select one: 81.8° O b. 31.8° O c 67.8° O d. 51.8° AT₁ AT, R L +7=4₂ W
Build an AC/DC dual power supply circuit that draws a 60Vp-p sinusoidal voltage, to provide a dc output voltage of +15 V. Full analysis of voltages and currents should be included. What modifications would you recommend to draw more current while maintaining same output voltage?
Q1. a) Figure Q1 is a single phase 2-level voltage source converter (VSC) with a total DC voltage V-1000V. A PWM scheme, by comparing a reference value with a 1kHz triangular waveform, is used to control the switches S₁ and S2, and output 340v at Vo. With the aid of graphs explain how pulse signals for the switches are generated, sketch the output voltage Vo, determine the duty cycle and the modulation index. Va + 2 it Va d + TS₁ V {1+5₂ = Figure Q1 A single phase VSC
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The average (DC) value of a half-wave rectified voltage with a peak value of 200 V is: a. 63.7 V b. 127.3 V c. d. OV 141 V 2. Voltage regulation is determined by: a. load current b. Zener current and load current c. changes in load resistance and output voltage d. changes in no-load voltage and full-load voltage When a 60-Hz sinusoidal voltage is applied to the input of a full-wave rectifier, the output frequency is: a. 120 Hz b. 60 Hz c. 240 Hz d. 0 Hz
a) Draw the basic topology of a buck converter. b) Design a buck converter to produce an output voltage of 18 V across a 10 2 load resistor. The output voltage ripple must not exceed 0.5 percent. The de supply is 48 V. Design for continuous inductor current. Specify the duty ratio, the switching frequency, the values of the inductor and capacitor, the peak voltage rating of each device, and the rms current in the inductor and capacitor. Assume ideal components.
A single-phase full-wave converter in the figure below is supplied with a 120-V, 60-Hz source. The load is highly inductive and the load current is continuous and free of ripples. The electromotive force is neglected (E 0) and the resistance has a value of R = 10 Q. The delay angle is equal to 31.8°. The average output current is 9.18A and the nth harmonic component is expressed as below. The harmonic factor (known as THD) would be equal to: R 2. vZ.1. Ir = Vo n. T +Yi, = I, E Select one: O a. 58.3% Ob. 48.3% O C. 78.3% Od. 68.3%
Input voltage of a boost converter 80 V, output voltage 140 V and switchingits frequency is 20 kHz. The converter efficiency is known to be 95%.a) Continuous conduction (current) in operation when the load resistance changes between 14 - 20ohmThe lowest inductance (L) value and output that should be used to maintain the operation.the peak-to-peak value of the voltage ripple should be used to be 2% of the output voltage.Calculate the capacitor's capacity (C).
The circuit diagram of step-up type DC-DC converter is given below. It is assumed that the output capacitor is large enough and the output voltage is constant. (Consider that there is no circuit losses.) What should the inductance value be in order for the circuit to always operate in the Intermittent Current Mode (DCM)?Calculate.
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
Part 2: In a step-up converter, consider all the components to be ideal, Let Va be 8-16 V, V. 24 V (regulated), fs-20 kHZ, Po ≥ 6 W. i). Calculate the minimum inductance L required to keep the converter operation in continuous-conduction mode under all conditions. ii). Specify the value of inductor for a maximum ripple of 3%. iii). Design a capacitor for part (i) and (ii) with a voltage ripple of less than 2%.

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