Exciter and electronic regulator for rotating machinery
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 16, 2002
Grant Date -
May 9, 2002
app pub date -
Jan 11, 2000
filing date -
Jan 11, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An exciter assembly for supplying power to a superconducting load, such as a superconducting field coil, disposed within a cryogenic region of a rotating machine. The exciter assembly provides an efficient and reliable approach for transferring the electrical power energy across a rotating interface and for controlling the ramp up and regulation of field excitation current in the field coil. In particular, the invention provides a controlled recirculation path for current flowing through the field coil. The exciter assembly includes a transformer having a primary winding and a secondary winding, a sensor which provides a control signal indicative of the flow of field excitation current to the superconducting load; and a current regulator which is disposed in the rotating reference frame and, on the basis of the control signal, regulates the field excitation current to a predetermined set. One of the primary and secondary windings is positioned in a rotational reference frame relative to the other of the primary and secondary windings.
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