Construction, Operation Working Principle, Starting Method, Application
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
The only way to change the speed is by varying the supply fréquency. It is not a self starting motor.
Construction, Operation Working Principle
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
An alternator works on the principle of electromagnetic induction.
Definition, Classification, Construction, Types, Solved Example Problems
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
Transformer is a static device, which transforms the electrical power from one circuit to another circuit at the same frequency.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
The characteristic of dc motor shows the relationship between the following quantities.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
Torque is nothing but turning or twisting force about an axis. It is measured by the product of the force and the radius at which this force acts.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
The DC motors are classified into three types based on the field winding connection with the armature.
Principle, Fleming's left hand rule, Working of d.c. motor,
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
A device which converts DC electrical energy to a mechanical energy is known as d.c. motor.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
These types of DC generators are generally more expensive than self-excited DC generators because of their requirement of separate excitation source.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
D.C. Generators are classified on the basis of the method of exciting the field coils as 1. Separately excited DC generator 2. Self excited DC generator
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
Hence, according to Faraday's laws of electromagnetic induction, E.m.F. generated per conductor = PϕN/60 volts
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
D.C generator is a machine which converts mechanical energy in to electrical energy. Direct -current generators are used to supply power for radio equipment, battery charging, electrolytic cells etc.
Introduction
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit II: Electrical Machines
An electrical machine is an electromechanical energy conversion device.