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Aalborg Universitet Microgrid Central Controller Development and Hierarchical Control Implementation in
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Frequently Asked Questions
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... 3.001 How do transformers work? Transformers are devices that transform voltage up or down by magnetic means. Alternating current (AC) flowing in a primary coil establishes an alternating magnetic flux in a "core" that easily conducts this flux. If another coil (called a "secondary" coil) is positi ...
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Metadyne



A metadyne is a direct current electrical machine with two pairs of brushes. It can be used as an amplifier or rotary transformer. It is similar to a third brush dynamo but has additional regulator or ""variator"" windings. It is also similar to an amplidyne except that the latter has a compensating winding which fully counteracts the effect of the flux produced by the load current. The technical description is ""a cross-field direct current machine designed to utilize armature reaction"". A metadyne can convert a constant-voltage input into a constant-current, variable-voltage output.
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