Rotating field transformer

Details Rotating field transformer Rotating field transformer

1997-03-03

1998-05-19

Berhane, Adolf

Electric power conversion systems

Current conversion

Using dynamoelectric machine converter

H02M 120

Patent

active

057544204

ABSTRACT:
A rotating field transformer comprises a torque motor and a rotating electric machine having two sets of windings, each of the windings connected to a respective polyphase electric circuit. The two windings have the same number of magnetic poles and generate coincident rotating magnetic fields having the same direction of rotation. When a torque is applied (e.g., to the shaft of a rotor carrying one of the windings) in the same direction as that of the rotating magnetic fields, electric power is transferred from the rotor-connected circuit to the stator-connected circuit. The rotating field transformer can be used to control the frequency at which power is supplied to a polyphase load, or to manage instabilities in weak links between generating stations.

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S. Withington, "Systems of Speed Control using Auxiliary Machines", 1941, pp. 748-765 of the Standard Handbook for Electrical Engineers, Knowlton & Shoop, eds., McGraw-Hill Book Company, NY.

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