Q.2: The O.C.C. test of a DC shunt generator at speed 1500 r.p.m. is: Field current-A 2 4 5 7 Armature volt-V 10 180 260 320 360 400 420 430 If the generator is driven at speed 900 r.p.m. Determine: (i) the voltage to which the machine will excite if the field resistance is 40 N. (ii) Critical speed and critical resistance. (iii) The additional resistance in the field circuit to reduce the EMF to 220V. (iv) Without the additional resistance, determine the load current supplied by the generator when its terminal voltage is 200 and the armature resistance is 0.1 2.

Q.2: The O.C.C. test of a DC shunt generator at speed 1500 r.p.m. is: Field current-A 2 4 5 7 Armature volt-V 10 180 260 320 360 400 420 430 If the generator is driven at speed 900 r.p.m. Determine: (i) the voltage to which the machine will excite if the field resistance is 40 N. (ii) Critical speed and critical resistance. (iii) The additional resistance in the field circuit to reduce the EMF to 220V. (iv) Without the additional resistance, determine the load current supplied by the generator when its terminal voltage is 200 and the armature resistance is 0.1 2.

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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Concept explainers

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.

Question

Q.2: The O.C.C. test of a DC shunt generator at speed 1500 r.p.m. is:
Field current-A
3
4
7
8
Armature volt-V
10
180
260
320
360
400
420
430
If the generator is driven at speed 900 r.p.m. Determine: (i) the voltage to which the
machine will excite if the field resistance is 40 N. (ii) Critical speed and critical
resistance. (iii) The additional resistance in the field circuit to reduce the EMF to
220V. (iv) Without the additional resistance, determine the load current supplied by
the generator when its terminal voltage is 200 and the armature resistance is 0.1 N.

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