Electrical Engineering ⇒ Topic : Selenium Rectifiers
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Gopal
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Selenium Rectifiers : The method of construction of a selenium rectifier is similar to that of the copper oxide rectifier. The cell consists of an iron or aluminium disc, one side of which is coated with
Fig.(a). Elements of the selenium rectifier a thin layer of selenium. After heat treating this assembly to form the copper crystalline structure, the selenium is sprayed with a metal of low-temperature melting point. The cell is then 'formed' by supplying it with a direct current in its reverse direction for several hours. The rectifying action takes place at the selenium film. | |
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