Q1. a)An SCR based AC power controller circuit is given in Figure 1. The circuitconnects a 240V 50Hz AC source vi to a resistive load with resistance of100. If the delay angle is a-15°, draw the waveforms of the load voltage Vo,and the voltage across SCR2. Calculate the power supplied to the load.+ViVa +2SCR2H₁₁SCR₁Figure 1 SCR based AC power control circuitVa +2iob)Figure 2 is a single phase 2-level voltage source converter (VSC) with aDC voltage Vd-200V. A PWM scheme, by comparing a reference value witha 10kHz triangle waveform, is used to control the switches S₁ and S2. Themodulation index of the PWM is m=0.8. With the aid of graphs explain howpulse signals for the switches are generated, sketch the output voltage Vo,determine the duty cycle, and calculate the average output voltage.+Vo+Vo√ ₂ ==Figure 2 A single phase VSC

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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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Q3) A. A step down de chopper is connected to an R=52 and L=10 mH. The de supply voltage is 100 V. The chopper is switching at a frequency of 1 kHz with a duty cycle of 50%. Determine the load current, lo and the peak to peak ripple current as an absolute value and as percentage of de value.
In the full-wave rectifier circuit of figure , the transformer has a turns ratio of 1:2. The transformer primary winding is connected across an AC source of 230V (rms), 50 Hz. The load resistor is 50ohms. For this circuit, determine the peak-to-peak ripple in the output voltage
Design a circuit to measure AC power using pic microcontroller. 1. Write the circuit diagram. 2. List the required components. 3. Illustrate the required formulas for this operation. 4. Write the program for this application. 5. Display the measured reading on LCD.
In the full-wave rectifier circuit of figure, the transformer has a turns ratio of 1:2. The transformer primary winding is connected across an AC source of 230v (rms), 50 Hz. The load resistor is 50ohms. For this circuit, determine the peak-to- peak ripple in the output voltage * Di v: = VmSin ot Vs V. + Vy = VSin ot D2 Full-wave rectifier. Circuit operation during positive half cycle ell + ミ」
A half-wave rectifier with a reservoir capacitor is connected to an AC mains supply(220Vrms, 50Hz) via a 20:1 transformer. What value of the capacitor is needed forthe ripple voltage of X% of the peak input voltage? The load takes a maximum currentof ???? mA. X= 12% mA = 160
A three phase fullwave controlled rectifier has an input voltage which is 480vrmsat 60hz. the load modelled as a series resistance and inductance with R=10ohm and l=50mH. determine the delay angle to produce an average of 50ain the load.
3. A step-up chopper is to provide a 48V across a 12Y~load from a 12V d.c. supply. The chopper inductance is 10tzH and the chopper frequency is 100kHz. Determine the duty cycle required and the variation of battery current during switching, and the maximum and minimum battery currents
18. A dc-dc converter is to be built with the following specifications: Allowed dc input voltage range: +8 V to +18 V +24 V Output average voltage: Output voltage ripple: ±0.06 V maximum at rated load 300 W, resistive ±250 mA maximum at rated load 100 kHz Rated load: Input current ripple: Switching frequency: Common ground between input and output. a. Draw a circuit which can perform this function. b. What is the necessary range of duty ratio for each switch? c. Find circuit part values (R, L, and C) which will meet the stated specifications.
one SCR in anti parallel with firing angel of 90° for the 30. A single-phase voltage controller, using a diode, feeds a load R and Vs = 230 V. For a SCR, the PMMC voltage connected across R would read

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