Power electronic transformers break new ground in transformation and transportation
The size of a transformer core is dictated by the frequency, and the frequency is given. Therefore, or so traditional wisdom suggests, transformers cores cannot be shrunk beyond a certain point. This paradigm, that has dictated the minimum size of power transformers for more than 120 years is about to be broken. The innovation behind the power electronic transformer says that even though the network frequency is given, power electronics allow the local frequency to be changed. At the same time, this frequency conversion means that the input frequency need not equal the output frequency, or can even be DC.
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