Electrical Braking of Polyphase Induction Motors: Electrical Braking of Polyphase Induction Motors which consists of different types, namely, Plugging (or Counter-Current Braking) Dynamic (or Rheostatic) Braking Regenerative Braking 1. Plugging…
Starting of Synchronous Motor and Precautions: As already stated the synchronous motor has got no self starting torque and the motor must first be brought up to synchronous speed by…
Dielectric Heating - Working, Advantages and Applications: When non-metallic parts such as wood, plastics, bones are subjected to an alternating electrostatic field dielectric loss occurs. In dielectric heating use of…
Arc Furnace - Definition, Types, Advantages and Application: When a high voltage is applied across an air gap, the air in the gap gets ionised under the influence of electrostatic…
Starting and Speed Control of Single Phase AC Series Motor: The starting and speed control of single phase AC series motor is carried out by varying the applied voltage. As…
Automatic Block Signalling System in Railways: The purpose of automatic block signalling system in railways is to keep trains apart but permit spacing as close as safety permits. For optimum…
Current Collection System in Electric Traction and Types of Current Collection: There are mainly two systems of current collection system for locoÂmotives, tramways or trolley buses viz Conductor rail system…
Power Sources for Welding Process: Both dc and ac are used for electric arc welding, each having its particular applications; in some cases either is suitable. The electric properties of…