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 D = 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.R₂FWDThiTh₂D.DFWDepFig.(3)Daecte

Problem Statement:A single-phase semi-converter is used to control the speed of a small separately…

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

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Question

Q3) A single-phase semiconverter, shown in Fig.(3), is used to control the speed of small separately
excited d.c. motor rated at 4.5 kW, 220V, 1500 rpm. The converter is connected to a single
phase 230 V, 50 Hz supply. The armature resistance is Ra = 0.50 ohm and the armature circuit
inductance is La 10 mH. The motor voltage constant is Ke D = 0.1 V/rpm. With the converter
operates as a rectifier, the d.c. motor runs at 1200 rpm and carries an armature current of 16 A
Assume 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.
R₂
FWD
Thi
Th₂
D.
D
FWD
ep
Fig.(3)
Da
ecte

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