2. An adaptor is designed to convert the AC 600-V(rms), 60-Hz input signal to a nearly DC output of 48 V (the maximum output voltage, have to consider VD,on of 0.8 V). Assuming the constant-voltage diode model is used for the rectifier design. (a) If a half-wave rectifier is used, determine the term ratio N of the transformer. (b) Determine the smoothing capacitor for the filter to have the ripple smaller than 0.3 V, if the load resistor is 2 kohm. Also, plot the output waveform as a function of time. (c) Repeat (a) and (b) if a full-wave rectifier is used in the design. N:1 ac line 600 V (rms) 60 Hz + Vs Diode rectifier Filter O + VOUT

2. An adaptor is designed to convert the AC 600-V(rms), 60-Hz input signal to a nearly DC output of 48 V (the maximum output voltage, have to consider VD,on of 0.8 V). Assuming the constant-voltage diode model is used for the rectifier design. (a) If a half-wave rectifier is used, determine the term ratio N of the transformer. (b) Determine the smoothing capacitor for the filter to have the ripple smaller than 0.3 V, if the load resistor is 2 kohm. Also, plot the output waveform as a function of time. (c) Repeat (a) and (b) if a full-wave rectifier is used in the design. N:1 ac line 600 V (rms) 60 Hz + Vs Diode rectifier Filter O + VOUT

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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Question

2. An adaptor is designed to convert the AC 600-V(rms), 60-Hz input signal to a nearly
DC output of 48 V (the maximum output voltage, have to consider VD,on of 0.8 V).
Assuming the constant-voltage diode model is used for the rectifier design.
(a) If a half-wave rectifier is used, determine the term ratio N of the transformer.
(b) Determine the smoothing capacitor for the filter to have the ripple smaller than 0.3
V, if the load resistor is 2 kohm. Also, plot the output waveform as a function of
time.
(c) Repeat (a) and (b) if a full-wave rectifier is used in the design.
N:1
ac line
600 V (rms)
60 Hz
O
Vs
Diode
rectifier
Filter
O +
VOUT

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It is required to design full-wave rectifier circuits. Consider the rectifier circuits shown in figures (a) center-tapped rectifier, (b) bridge rectifier. Assume the input voltage is from 120V(rms), 60HZ ac source. The desired peak output voltage vo is 10V. A conducting diode has a voltage drop of 0.7V. In each case, (i) Determine the required turns ratio of the transformer; (ii) Determine the required peak inverse voltage (PIV) of the diodes. D, Center tap R. D. ac line line voltage R voltage D (b) (a) Ans: (1) Turns Ratio (ii) PIV Center tapped Center tapped_ Bridge Bridge
Exercises: 1. A full-wave bridge rectifier isolated from the 220 V rms power line by a transformer. Assuming the diode voltage drops are 0.7 V. i. What turns ratio should the transformer have in order to produce an average current of 1 A in a 10 Q load? ii. What is the average current in each diode under the conditions of (i)? iii. What minimum PIV rating should each diode have? iv. How much power is dissipated by each diode? 2. A full-wave bridge rectifier is operated from a 50 Hz, 220 V rms line. It has a 100 uF filter apacitor and a 2 k 2 load. Neglect diode voltage drops. i. What is the percent ripple? ii. What is the average current in the load?
Exercises: 1. A full-wave bridge rectifier isolated from the 220 V rms power line by a transformer. Assuming the diode voltage drops are 0.7 V. i. What turns ratio should the transformer have in order to produce an average current of 1A in a 10 load? ii. What is the average current in each diode under the conditions of (i)? iii. What minimum PIV rating should each diode have? iv. How much power is dissipated by each diode? 2. A full-wave bridge rectifier is operated from a 50 Hz, 220 V rms line. It has a 100 μF filter capacitor and a 2 k 2 load. Neglect diode voltage drops. i. What is the percent ripple? ii. What is the average current in the load?
A. Define Commutation. List the method of commutation and explain the external plus commutation method in details. B. Find an expression for output dc voltage in single phase fully controlled thyristor rectifier taking the effect of source inductance into consideration.
b. Calculate the following about the circuit in the figure (If silicon diodes are employed in the rectification);i. the peak value of the output voltage considering the drop across each diode, Vpk.ii. the average voltage, Vdc. iii. The current through the load resistor, IL.iv. The current diode, Id.v. The frequency of the output signal, Fout.vi. Calculate the efficiency of the full wave rectifier expressed in percentage. vii. Sketch a graph of the input and output voltage against time.
The main advantage of a bridge rectifier using tha same input transformer as a full-ave rectifier is that _______________. a) İt will double the output voltage. b) less current is required fort he diodes to conduct. c) the ripple frequency is twice that of the full wave rectifier. d) the ripple frequency is on-half that of the full wave rectifier.
> A three-phase, half-wave uncontrolled rectifier is fed from an ideal three-phase voltage 50 Hz. The load is resistive with R=15 Q. Calculate: (a) The average output voltage and average load current of the rectifier. (b) The d.c. and a.c. power dissipations in the load. ae (c) The diode ratings. (d) What is the lowest ripple frequency of the output voltage waveform?
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