A DC motor separately excited is used single-phase full converter to control the speed of a 5 hp, 110 V, 1200 rpm. The converter is connected to a single-phase 120 V, 60 Hz supply. The armature resistance is Ra=0.4 2, and armature circuit inductance is I -5 mH. The motor voltage constant is KO=0.09 V/rpm. Rectifier (or motoring) operation. The de machine operates as a motor, runs at 1000 rpm, and carries an armature current of 30 amperes. Assume that motor current is ripple-free. (a) Determine the firing angle a. (b) Determine the power to the motor. (c) Determine the supply power factor. Notes: losses in the converter are neglected, the power from the supply is the same as the power to the motor. ¹0 S₁ S3 P SA S₂ (u) ·00 E₂ C my

A DC motor separately excited is used single-phase full converter to control the speed of a 5 hp, 110 V, 1200 rpm. The converter is connected to a single-phase 120 V, 60 Hz supply. The armature resistance is Ra=0.4 2, and armature circuit inductance is I -5 mH. The motor voltage constant is KO=0.09 V/rpm. Rectifier (or motoring) operation. The de machine operates as a motor, runs at 1000 rpm, and carries an armature current of 30 amperes. Assume that motor current is ripple-free. (a) Determine the firing angle a. (b) Determine the power to the motor. (c) Determine the supply power factor. Notes: losses in the converter are neglected, the power from the supply is the same as the power to the motor. ¹0 S₁ S3 P SA S₂ (u) ·00 E₂ C my

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

A DC motor separately excited is used single-phase full converter to control the speed of a 5 hp,
110 V, 1200 rpm. The converter is connected to a single-phase 120 V, 60 Hz supply. The armature
resistance is Ra=0.4 2, and armature circuit inductance is I-5 mH. The motor voltage constant
is KO=0.09 V/rpm.
Rectifier (or motoring) operation. The de machine operates as a motor, runs at 1000 rpm, and
carries an armature current of 30 amperes. Assume that motor current is ripple-free.
(a) Determine the firing angle a.
(b) Determine the power to the motor.
(c) Determine the supply power factor.
Notes: losses in the converter are neglected,
the power from the supply is the same as the power to the motor.
S₁
S3
SA
S₂
(u)
VO
E₂
R₁

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