Electrical Engineering ⇒ Topic : Rectifier and its types
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Sachin
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RECTIFIERS A 'rectifier' is a device which converts alternating current into unidirectional current by virtue of a characteristic permitting appreciable flow of currents in only one direction. Types of Rectifiers. Some of the common types of rectifiers used are given below :
Where the power requirements are comparatively small, it is customary to employ solid materials types such as copper-oxide or selenium rectifiers, or the glass-enclosed hot cathode type (such as Tungar or Rectigon). Mechanical and electrolytic types of rectifier have been used on occasion, but they are generally subject to operating difficulties and are of low efficiency. For installations requiring large amounts of power such as traction motors and the electromechanical industries, the mercury-arc type of rectifier is the accepted standard.The commutator and its brushes on a D.C. machine are, of course, a mechanical rectifier that performs an important and reliable function, especially when used with interpoles and compensating windings. | |
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