A 3-phase 6-pulse converter is operated from a three-phase star- connected 230 V, 50Hz supply and the load resistance is 15 Q2. If it is required to obtain an average output voltage of 50% of the maximum output voltage, calculate: (i) The delay angle a. (ii) The average output current. (iii) The average thyristor current. The RMS value of the output voltage can be calculated from: --V.(1 + 3√5 cos(2a) 1,3√3 2 4π V=V

A 3-phase 6-pulse converter is operated from a three-phase star- connected 230 V, 50Hz supply and the load resistance is 15 Q2. If it is required to obtain an average output voltage of 50% of the maximum output voltage, calculate: (i) The delay angle a. (ii) The average output current. (iii) The average thyristor current. The RMS value of the output voltage can be calculated from: --V.(1 + 3√5 cos(2a) 1,3√3 2 4π V=V

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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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
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%
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
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Design a buck converter such that the output voltage varies between from 20V to 28V while the input voltage is 40V. The maximum load power is 200Wde. Assume the switching frequency is 15kHz. (a) Design the converter such that it will be in continuous current mode. (b) The capacitor realized output voltage ripple must not be more than 1% at worst case. (c) The inductance realizes CCM at worst case. (d) Select the appropriate switch and other elements
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.
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%.
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A three phase full controlled converter is supplied by a phase voltage Vs=120V, 60 Hz. Consider a resistive load R=10 Q. If the average value of the output current is equal to 7.025A and the RMS value of the input line current is equal to 8.93A, then the TUF would be equal to: Select one: a. 0.955 O b. 0.557 O c. 0.153 O d. 0.707
DC to AC 1) Determine the efficiency of the following DC to AC converter (i.e. how much of the energy is in the Ist harmonic?). (on for 10ms (+20V), off for 20ms, on for 10ms (-20V), off for 20ms, repeat) +20V 20ms 20ms 10ms ov 10ms -20V 1) Determine the efficiency of the following DC to AC converter (i.e. how much of the energy is in the Ist harmonic?). +2-V -20V 10ms 20ms Oms 30ms 40ms
Consider a step down converter supplied by a DC power source of magnitude Vs = 220 V. The switching period is 0.1 ms and the duty cycle k is set to 0.5. The load is an inductive load with R-S Ohms and L-10 mH. The switch is ideal. The RMS converter current IR is equal to 15.56A. The ripple factor of the input current RFs would be equal to: Select one: O a. None of these O b. 0% OC. 100% O d. 50%