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PMG, EXCITATION, AVR & Power generation phenomenon in Generators

PMG: The PMG (Permanent Magnet Generator) is a system which is used for secondary exciting. The PMG provides stable and reliable electric energy for AVR regardless the generator’s terminal voltage. The generator with PMG excitation system can provide 300% rated current during short-circuit, which occurs for 5–10 seconds. The most common function of a diode is to allow an electric current to pass in one direction (called the diode’s forward direction), while blocking it in the opposite direction (the reverse direction). As such, the diode can be viewed as an electronic version of a check valve. This unidirectional behavior is called rectification, and is used to convert alternating current (AC) to direct current (DC). EXCITER & EXCITATION: DC supply is required to give to the field winding of a generator. This DC supply is obtained from various sources. Supply of DC power to the field is called excitation. There are two types of excitation. • Separately e