Q3) A single-phase semiconverter, shown in Fig.(3), is used to control the speed of small separatelyexcited d.c. motor rated at 4.5 kW, 220V, 1500 rpm. The converter is connected to a singlephase 230 V, 50 Hz supply. The armature resistance is Ra = 0.50 ohm and the armature circuitinductance is La = 10 mH. The motor voltage constant is Ke Q=0.1 V/rpm. With the converteroperates as a rectifier, the d.c. motor runs at 1200 rpm and carries an armature current of 16 AAssume that the motor current is continuous and ripple-free(a) Draw and drive an equation for output voltage of semiconverter(b) The firing angle a.(c) The power delivered to the motor.(d) The supply power factor.RFWDTh₁Th₂D.DFWDepFig.(3)Daecte

Answered: Image /qna-images/answer/afbbc8bd-5b25-4d07-b1cb-dfb6a2df807d.jpg

Answered: Q3) A single-phase semiconverter, shown…

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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An induction motor has the following ratings: 4.6 kV (L-L), 60 Hz, six pole, 10 MW, 1192 r/min. It is to drive a compressor requiring a torque of 75 kN-m at a speed of 1000 r/min. A simple voltage-source inverter supplied from a three-phase, phase-controlled rectifier is to be used. The available utility supply is at 4.6 kV (L-L), three-phase, and 60 Hz. Mak- ing any reasonable assumptions, estimate: (a) the required frequency of the inverter (b) the required direct-link voltage (c) the delay angle of the rectifier.
A single-phase center-tapped transformer rectifier has an ac source of 240 V rms and 60 Hz. The overall transformer turns ratio is 3:1 (80 V between the extreme ends of the secondary and 40 V on each tap). The load is a resistance of 462 Ω. Determine (a) the average load current, (b) the rms load current, (c) the average source current, and (d) the rms source current. Sketch the current waveforms of the load and the source
A single-phase, 60 Hz(input) convertor, such as shown below, operates at a synchronous carrier frequency of 300 Hz, The DC Link voltage is 680 V, and the effective value of the fundamental AC voltage E34 is 430 V. Calculate; 1) The duty cycle D, and Ton when the AC voltage is 500V. 2) The duty cycle D, and Ton when the AC voltage is -30V. 3) Draw the waveform of the convertor output. 5 EL 4-quadrant switching converter EH 2 4 6 D Se
Which of the following sensors has a permanent magnet inside? Hall effect sensor thru-beam optical sensor piezo-electric sensor LVDT capacitive proximity sensor |o|0|0|6
A single phase full wave AC voltage controller has a resistive load of 5 ohms and an input voltage of Vs = 220 V (RMS), 50 Hz. The delay angles of both thyristors are set to 90 degrees. The maximum power that can be delivered to the load is: Select one: a. 5.65 kW b. 9.68 kW c. 11.52 kW d. None of these
(a)Design a forward converter to produce an output voltage of 30V when the input dc voltage is unregulated and varies from 150V to 175V. The output power varies from 20W to 50W. The duty ratio of the switch is varied to compensate for the fluctuations in the input dc source to regulate the output voltage at 30V. Specify: the switching frequency and range of required duty ratio of the switch, ii. the turns ratios of the transformer, i. the value of L, and iv. the capacitance required to limit the output ripple to less than 0.2%. Your design MUST work for all operating conditions.
3.16 A three-phase, full-wave half-controlled rectifier bridge circuit is operating at a delay angle a = 67° when supplying full power. The per-phase inductance of the coupled transformer is 2 mH. The input voltage has an rms magnitude of 230 V per phase at 50 Hz. The load current in the d.c. side is 15 A at 200 V. It is required to: 360 203 JEI (a) Obtain the drop in the d.c. voltage due to current overlap. EI (b) Calculate the rms secondary voltage of the transformer. (c) Calculate the overlap angle. brosio (d) Obtain the recovery angle while the converter in operating in the onil s lo ad inversion mode with 15 A, 200 V d.c. input. oddiw (e) Obtain the firing angle for the conditions in (d). giv owd to gar[Ans : (a) 4.5 V, (b) 450 V, (c) 1.06°, (d) 67.14°, (e) 111.8°] LE
C. A single phase full converter feeding RL load has the following data: source voltage 230V(RMS), SOHZ.R-2.52 L=very large, firing angle -30"f the load inductrance is large enough to make the load current constant then i Sketch the time variation of sounce voltage source current, load voltage, load current current through one thyristor and voltage across it H. Compute the average value of load voltage and load current, Derive the formula.
Please solve all parts
Q2) single-phase bridge-type cycloconverter has input voltage of 230V and 50Hz and load of R=102. Output frequency is one-third of input frequency. For a firing angle delay of 30°, (a) Draw the circuit, (b) Calculate RMS value of output voltage (c) Calculate RMS current of each converter (d) input power factor.
Q4. A switch-mode power supply is to be designed with the following specifications: Va = 47 V + 10% Vo = 5 V Switching freq. f, = 100 kHz Pioad= 15 – 45 W A forward converter operating in a continuous-conduction mode with a demagnetizing winding (N3=N1) is chosen. Assume all components to be ideal except for the presence of transformer magnetization inductance. a. Calculate N/N1 if this turns ratio is desired to be as small as possible. b. Calculate the minimum value of the filter inductance.
A Cockcroft-Walton type voltage multiplier has ten stages with capacitances, all equal to 0.1 μF. The supply transformer secondary voltage is 100 kV at a frequency of 60 Hz. If the load current to be supplied is 5 mA, find (a) the percentage ripple, (b) the regulation, and (c) the optimum number of stages for minimum regulation or voltage drop.

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