Numerical Problems 1. A four-pole, lap wound DC machine is having 500 conductors on its armature and running at 1000 rpm. The flux per pole is 30 m Wb Calculate the voltage induced in the armature winding. What will be induced emf if the armature is rewound for wave winding? (Ans. 250 V, 500) 2. A 4-pole machine has an armat

Numerical Problems 1. A four-pole, lap wound DC machine is having 500 conductors on its armature and running at 1000 rpm. The flux per pole is 30 m Wb Calculate the voltage induced in the armature winding. What will be induced emf if the armature is rewound for wave winding? (Ans. 250 V, 500) 2. A 4-pole machine has an armat

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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Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.

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Electrical Machines
Numerical Problems
1. A four-pole, lap wound DC machine is having 500 conductors on its armature and running at 1000 rpm.
The flux per pole is 30 m Wb Calculate the voltage induced in the armature winding. What will be induced
emf if the armature is rewound for wave winding?
(Ans. 250 V, 500 V)
2. A 4-pole machine has an armature with 90 slots and 8 conductors per slot, the flux per pole is 0.05 Wb
and runs at 1200 rpm. Determine induced emf if winding is (i) lap connected (ii) wave connected.
(Ans. 720 V, 1440 V

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