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Shunt DC Motor

Series DC Motor

Compound DC Motor

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Labels: Electrical

Spring control and Gravity control

Spring control This is the most common method of providing controlling torque in electrical instruments. It may involve one or more spr...
Air Friction Damping and Fluid Friction Damping

Air Friction Damping In this type of damping a light vane or vanes having considerable area is attached to the moving system to develo...
Eddy Current Damping

Eddy current damping is the most efficient form of damping. The essential components in this type of damping are a permanent magnet; and...
Comparison between PMMC and MI instruments:

PMMC MI Suitable for measuring Direct current and voltage Direct and alternati...
Moving-iron Instruments

In moving–iron instruments the movable system consists of one or more pieces of specially-shaped soft iron, which are so pivoted as to b...