Bi-directional field control for proportional control based generator/alternator voltage regulator
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United States of America Patent
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May 2, 2006
Grant Date -
Aug 12, 2004
app pub date -
Feb 7, 2003
filing date -
Feb 7, 2003
priority date (Note) -
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Abstract
An H-bridge switching topology for bi-directional field excitation to null the effects of a rotor's permanent magnets uses both a low-side and a high-side field excitation driver to control the rotor's average field current. A standard proportional control signal for generators using uni-directional field excitation is used to control an H-bridge for bi-directional field excitation. The H-bridge consists of two pair of power switches. In a preferred embodiment, the switches are n-channel MOSFETs. A drive circuit interfaces a logic block with the H-bridge in order to properly bias the power switches.
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