Q1) A single-phase full converter shown in Fig.1 is supplied from 230 V, 50 Hz source. Theload consists of R-100 and a large inductance so as to render the load current constant.For a firing angle delay of 30°,(a) Find The following1. Draw and determine average output voltage & average output current2. Average and rms values of thyristor currents and the power factor.(b) Repeat (a) if the source has an inductance of 1.5mH.TFig.1TLVLMR

Answered: Q1) A single-phase full converter shown…

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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Q1) The buck converter has an input of 50 V and an output of 25 V. The switching frequency is 100 kHz, and the output power to a load resistor is 125 W. Determine: (a) the duty ratio. (b) the value of inductance to limit the peak inductor current to 6.25 A. (c) the value of capacitance to limit the output voltage ripple to 0.5 percent.
Exercise Design a buck converter to produce an output voltage of 18 V across resistor. The output voltage ripple must not exceed 0.5 percent. The dc 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. Assume the inductor be 25 percent larger than the minimum to ensure that inductor current is continuous.
An ideal boost converter is required to have a constant output voltage of 12 V at 24 W load.The input voltage varies from 2.7 to 4.5 V (as in a battery cell). Select a switching frequency of100 kHz. The value of the inductance in the boost converter is 2.2 uH. Determine:(a) The range of duty cycle that the converter will operate with (hint: mode?), and(b) The minimum value of the output capacitance such that the pk-to-pk load voltage rippleis less than 2%.
4: Design a buck converter to produce an output voltage of 18 V across a 10-_ load resistor. The output voltage ripple must not exceed 0.5 percent. The dc 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.
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
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%.
Sub:power electric
EX3) Design a boost converter to provide an output voltage of 36V from a 24 V source. The load is 50 W. The voltage ripple factor must be less than 0.5%. Specify the duty cycle ratio, switching frequency, inductor and capacitor size, and power device.
C. A single phase full converter feeding RL load has the following data: source voltage 230V(RMS), SOHZ.R-2.52 L=very large, firing angle -30"f the load inductrance is large enough to make the load current constant then i Sketch the time variation of sounce voltage source current, load voltage, load current current through one thyristor and voltage across it H. Compute the average value of load voltage and load current, Derive the formula.
Do calculation. This is not a simulation problem
In a single-phase half-wave ac-dc converter, the average value of the load current is 1.78 A. If the converter is operated from a 240 V, 50 Hz supply and if the average value of the output voltage is 27% of the maximum possible value, calculate the following, assume the load to be resistive. (a) Load resistance (b) Firing angle (c) Average output voltage (d) The rms load voltage (e) The rms load current (f) DC power (g) AC power (h) Rectifier efficiency (i) Form factor (j) Ripple factor

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