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…
Special Features of Thyristor Drive Motors: The most commonly used dc motors for thyristor drive are separately excited and series excited dc motors. The thyristor drive motors usually differ from…
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 Contactor - Definition, Working Principle and Types: Magnetic Contactor is a electromagnetically operated switches that provide a safe and convenient means for repeatedly making and breaking branch circuits. The…
Various Pilot Devices in Motor Control: Motor control devices may be classified as primary control devices and pilot control devices. Pilot devices control the primary control devices which in turn…
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…
High Frequency Eddy Current Heating - Working, Advantages and Applications: The articles to be heated are placed within a high frequency current carrying coil, alternating magnetic field is set up,…