(b) A pair of thyristor connected in inverse-parallel as shown in Figure Q4(b), The thyristor are triggered at an angle a after their respective anode voltage zeros. (i) Sketch the load voltage waveform for a=30°. (ii) Calculate the rms value voltage VL and current Il for a=30°. (iii) Calculate the output power for a=30°. (iv) If thyristor T2 is fail to operate, what effect would this have on the value of the output voltage of the converter at a = 30°.

(b) A pair of thyristor connected in inverse-parallel as shown in Figure Q4(b), The thyristor are triggered at an angle a after their respective anode voltage zeros. (i) Sketch the load voltage waveform for a=30°. (ii) Calculate the rms value voltage VL and current Il for a=30°. (iii) Calculate the output power for a=30°. (iv) If thyristor T2 is fail to operate, what effect would this have on the value of the output voltage of the converter at a = 30°.

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...

See similar textbooks

Similar questions

A schematic design of a full-wave bridge type power supply is given below. Provide the appropriate values for the inductors, diodes, capacitor and resistors, such that the output DC voltage is 6.2 V and the max. output power for the load resistance is 20 mW (percentage error for output voltage and output power is 2%). AC voltage source: Amplitude=311.13, Freq=60, DC offset= 0. For the rectifier part, choose diodes with an appropriate PIV rating. Show all the formulas and computations involved in acquiring the values for the inductors, diodes, capacitor and resistors. In choosing your Zener diode, consider the output voltage and the output current. Note that the output current should be the minimum Zener current. For the value of the series resistor RS, choose a lower value for less ripple but always consider the required output voltage. The ripple voltage peak-to-peak value should be less than or equal to 1% of the required output voltage. Use the formula below for choosing the value…
A fully controlled three-phase rectifier bridge circuit supplies a dc load of 300V,60A, from 415V 3-phase ac supply via delta-star transformer. (i) Determine the required thyristor and transformer specifications. (ii) Draw the load and thyristor voltages when firing angle alpha = 60°. (ii) If a commutating diode is placed across the load, determine the FWD specification and then calculate the average load voltage and FWD average current when firing angle alpha = 45°
Consider the full-wave rectifier circuit shown below, where• vS(t) is a sinusoidal signal with a peak value (Vs = 5 V).• Diodes are modelled using constant voltage model with VDO = 0.7 V• The ac line voltage has an rms value of 120 V and a frequency (f) = 60 Hza) Calculate the transformer turns ratio. b) Plot in the same graph signal vS(t) and the output signal vO(t) versus time (t) (show all details including amplitudes, time instances, etc.) c) Calculate the rms value of the output signal vO(t). (hint: sin2(x) = 0.5(1- cos(2x))) d) If a capacitor C=3.58 F is connected across R = 10 k, repeat (b) in a new graph
A full-wave rectifier is connected to a single-phase source and supplying an inductive load. For the sake of simplicity, you can assume that the ripple at the output current is negligible. Input specifications: The source is single-phase utility grid at 220 V and 50 Hz. Output specifications: The load resistance is 10 Ohm. Sketch the schematic of the system. Sketch the waveforms of the output voltage and current and the source voltage and current. Determine all the performance parameters.
2b) A regulator curcuit needs to be designed with an input power supply which has a nominal value of V_PS=20 V and can vary by ± %25 and nominal output voltage of 10 volts. For this purpose a zener diode is employed with specifications given; power rating of 1 W, 10V drop at Iz=25 mA, output load current is to vary between I(subscript L)=0-20 mA and zener resistance of r_Z=5Ω i) If the minimum Zener current is to be I_Z=5 mA, determine the required R_S ii) Determine the maximum variation in output voltage iii) Determine the regulation percent
Which of the following statements about bridge tip rectifiers is false? A) If the 1-phase type has source inductance, the average value of the output voltage is lower than in the absence of the inductance. B) The average output voltage value of the 1-phase type is 0.9 times the peak voltage of the network. C) none D) There are only odd harmonics in the current drawn by the 1-phase type from the mains. E) The average value of the output voltage of the 3-phase type is larger as the 3-phase and 1-phase types are compared
Design rectifier circuits to provide an output of100 VDC using a.) HWR b.) Center-tappedFWR and c.) Bridge-Type FWR circuits. For each circuit, calculate the transformer peakvoltage rating, the diode PIV ratings, and thetransformer turns ratio, if power is taken fromthe 220V line ac supply
Create a schematic diagram for building an AC-DC power supply that uses a complete bridge rectifier, filter capacitors, and regulators and has a selectable output voltage. Keep in mind: When a load is attached, the power supply must be able to deliver at least 500mA of output current.
i) Draw the circuit diagram of the single phase full wave controlled rectifier (RL load) with center-tapped transformer and compare its performance with uncontrolled rectifier operation. (ii) A single phase fully controlled bridge rectifier circuit has DC output voltage 175 V for an AC supply voltage of 210 V rms. Find the firing angle delay of the circuit for the following cases (a) Converter mode (b) Inverter mode
Q ) For the full- wave uncontrolled rectifier circuit supplying a series resistive Thesupply voltage is v =300 sinωt , the supply frequency is 50 Hz and the loadparameter values are: R =05 Ω,a) Sketch the diagram of electrical circuitb) Sketch the load voltage and current waveforms .c) Calculate the load currentd) Calculate the average DC load voltage Vdc .e) Calculate the supply power to the loa
The voltage waveforms shown below are obtained from a three-phase power rectifier used in an ESKOM application.The rectifier output before the inductive filter is denoted by VL and the load voltage after the inductive filter by Vo. Ignore any diode losses and consider a load resistance of 12.7 Ω. Analyse the waveforms and specify / calculate,11) the supply frequency;12) the rectifier pulse number;13) the rectifier average output voltage;14) the average output current;15) the r.m.s. value of the output current;16) the r.m.s. value of the harmonics present in the output current;17) the dc current rating of the rectifier diodes;18) the r.m.s. current rating of the rectifier diodes;19) the peak repetitive reverse voltage rating of the rectifier diodes;20) the peak repetitive forward current rating of the rectifier diodes;21) the line-line r.m.s. voltage of the three-phase supply;22) the rectification efficiency of the converter;23) the converter transformer utilisation factor;
Q ) For the full- wave uncontrolled rectifier circuit supplying a series resistive The supply voltage is v =300 sinωt , the supply frequency is 50 Hz and the load parameter values are: R =05 Ω, a) Sketch the diagram of electrical circuit b) Sketch the load voltage and current waveforms . c) Calculate the load current d) Calculate the average DC load voltage Vdc . e) Calculate the supply power to the load.