It is the electricity supply system for devices and equipment that require a different frequency from the mains for the operation of the device powered by AC voltage. It is the conversion of the 50Hz mains frequency to the 400Hz or 60Hz frequency required for the operation of the device. Static frequency converters perform the frequency conversion in two stages. First, the input voltage is converted to DC voltage with the help of rectifiers. Then, with the help of the inverter, this DC voltage is converted to AC voltage at the desired frequency. Transistor, thyristor, he says, is used for switching after these processes.
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