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Need of filter circuit Filters are the electronic circuits used along with rectifiers to get a pure dc voltage. From all the rectifiers circuits get pulsating dc o/p. Where pulsating means some ac part or some ripples

Difference between Resultant and Equilibrants

Following are four main difference in Resultant and Equilibrants force No. Resultant Equilibrant 1. Definition: A resultant of number of forces acting on a body is a single. Force which can produce the same effect on the

What is Rectification

Rectification is the process of converting the alternating voltage or current into the corresponding direct (dc) quantity. (Direct voltage or current) The input to a rectifier is ac whereas its output is unidirectional or dc. The electronic


General requirements of Traction motors / traction system High starting torque A traction motor must have high starting torque. For urban and sub urban lines, the acceleration (speed at starting) should be high. Simple speed control –

Single Phase AC System vs Three Phase AC System (with Picture)

Motor used – A.C. series motor Voltage – 15 KV to 25 KV This is the voltage of overhead wire and not of motor. Motor operates at 400 V or 300 V. So, the 25 KV voltages

Direct Current (DC) System

Motor used in Direct Current System – Dc Series Motor Dc Compound Motor (as regenerative braking is difficult for Dc series motor) Dc series motor has high starting torque and easy speed control. Size of Dc series

Construction of DC Machine

The main parts of DC Machine (motor or generator) are as follows: Yoke Pole core and pole shoes Pole coil and field coil Armature core Armature winding or conductor Commutator Brushes and bearings 1. Yoke Function It

Types of Dc Machines

Following are three types of dc machines: 1) DC generator: “Energy can be converted from one form to other form” It is rotated by prime mover and produces a dc voltage. i.e. Convert mechanical energy into electrical