Excitation of switched reluctance motors
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United States of America Patent
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Apr 24, 2007
Grant Date -
Nov 11, 2004
app pub date -
Apr 30, 2004
filing date -
May 7, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A switched reluctance drive is supplied from a power source. The phases of the machine are controlled by a current controller which uses an excitation strategy to minimize the supply current drawn for a particular output. The strategy alternates the excitation between two phases for a given time until the rotor moves to a desired position. A method of starting a switched reluctance motor having a stator with at least two phases, a moveable part, and a position transducer includes determining from transducer output a plurality of phases that are available to produce force in a desired direction, energizing a first phase of the available phases for a predetermined time period that is independent of the transducer output, and energizing a second phase of the available phases after energization of the first phase is initiated.
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