6.11. A single-phase full converter feeding RLE load has the following data. Source volt-age=230 V, 50 Hz; R = 2.5 2, E = 100 V, Firing angle = 30°.If load inductance is large enough to make the load current virtually constant, then(a) sketch the time variations of source voltage, source current, load voltage, load current, currentthrough one SCR and voltage across it,(b) compute the average value of load voltage and load current,(c) compute the input pf. [Ans. (a) Refer to Fig. 6.10 (b), (b) 179.30 V, 31.72 A (c) 0.7796 lag]

Step 1: Interpreting question data:Step 2: Since load current is given as constant, it means it is…

Answered: 6.11. A single-phase full converter…

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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1) AC power in a load can be controlled by using a. Two SCR's in parallel opposition b. Two SCR's in series c. Three SCR's in series d. Four SCR's in series 2) The advantage of using free - wheeling diode in half controlled bridge converter is that a. There is always a path for the ac current independent of the ac line b. There is always a path for the dc current independent of the ac line c. There is always a path for the dc current dependent of the ac line d. There is always a path for the ac current dependent of the ac line 3) Silicon controlled rectifier can be turned on a. By applying a gate pulse and turned off only when current becomes zero b. And turned off by applying gate pulse c. By applying a gate pulse and turned off by removing the gate pulse d. By making current non zero and turned off by making current zero
A thyristor half-wave controlled converter has a supply voltage of 240V at 50Hz and a load resistance of 100 ohms. What are the average values of load voltage and current when firing delay angle is; 1. 140 degrees. 2. 30 degrees.
consider the following specifications for buck converter : Vin= 80v, Ro = 9 ohms, Po = 100watts, frequency is 150khz. determine a. the inductor value at the boundary condition. b. the maximum inductor current value for L = 10 Lcrit. (c). the doide rms and average current values
(c) A buck converter, as shown in Figure Q3(i) below, is working in steady state. The output voltage and the inductor current can be assumed to be ripple free. Figure Q3(ii) shows the inductor voltage VL during a complete switching interval. Assuming all devices are ideal, determine (i) The output voltage, input voltage and the duty cycle of the buck converter. (ii) The inductor value required to maintain a peak-to-peak ripple current of 0.4A, if the switching frequency is 100kHz. V. M 30V 本D c+ v. TON TOFF 20V Ts (i) (ii) Figure Q3. (i) Equivalent circuit of a buck converter and (ii) inductor voltage over one complete cycle.
QUESTION 1 Design a high efficiency 3.3 V, 5A d.c.to d.c. power converter from a 4 to 5.5 Vdc source. The maximum allowable inductor current ripple and output voltage ripple are 0.1A and 20 mV, respectively. Assume a switching frequency of 20 kHz. a) Design a suitable converter power circuit using a MOSFET switch, showing all calculation of inductor and capacitor values and drawing a circuit diagram of the final design including component values. Indicate the peak inverse voltage and forward current rating of any diode required, and the maximum drain- source voltage of the MOSFET. b) On the Schematic diagram, draw the path of the current flow during the ON time and the OFF time. c) Describe the effect of changing the values of the inductor and the capacitor in the circuit. d) What is the effect of switching frequency in the circuit? e) Draw the schematic diagram of a circuit with the output voltage higher than the input voltage.
6.8. In a single-phase mid-point converter, turns ratio from primary to each secondary is 1.25. The source voltage is 230 V, 50 Hz. For a resistive load of R = 2 2, determine (a) maximum value of average output voltage and load current and the corresponding firing and conduction angles, (b) maximum average and rms thyristor currents, (c) maximum possible values of positive and negative voltages across SCRs, (d) the value of a for load voltage of 100 V, (e) the value of voltage across SCR at the instant of commutation for a of part (d). Hint. (b) Maximum average thyristor current =; So 2n 0 [Ans. (a) 165.63 V, V. m R sin o d(at) etc. 82.82 A, a=0°, y= 180° (b) 41.41 A, 65.054 A (c) 520.4 V. 520.4 V (d) 52,862° (e) 414.82 V]
Describing the concept of discontinuous conduction mode in power converters, how does continuous conduction mode differ?Make a DC-DC converter circuit that operates in discontinuous conduction mode.
The circuit diagram of step-up type DC-DC converter is given below. It is assumed that the output capacitor is large enough and the output voltage is constant. (Consider that there is no circuit losses.) What should the inductance value be in order for the circuit to always operate in the Intermittent Current Mode (DCM)?Calculate.
Drive the expression for the average output voltage of a single phase full converter and draw the waveform of output voltage. please explain in details
A step down de chopper is connected to an R5 2 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.
A resistor Ra is in series with a voltage source Va. Draw the circuit. Label the voltage across the combination as v and the current as i. Draw and label the volt–ampere characteristic (i versus v).
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

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