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…
Speed Control of Three Phase Induction Motor: The problem of speed control of three phase induction motor in particular is of great practical importance. In a number of industries motors…
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…
Starting of Electric Drives: The most important processes associated with controlled electric drives are (i) starting, (ii) speed control (iii) braking, (iv) reversal of direction of rotation. All these are…
Selection of Electric Drive: For selection of electric drive motor it is essential that the conditions of service are well known. It is not sufficient to simply specify the output…
Electromagnetic Relay - Definition, Construction and Working Principle: Electromagnetic Relay - A relay, in the general sense of the word, is any apparatus which serves to actuate or control the…
Magnetic Amplifier - Working Principle and Applications: In a magnetic amplifier, the basic component is a steel-cored coil with an additional winding energized by direct current. It is intended for…
Amplidyne (Rotary Amplifier) - Definition, Construction, Connection Diagram, Workings and Applications: The amplidyne is a rotary amplifier in which a small amount of power supplied to excite the field is…