Systems and methods for detecting angular position
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United States of America Patent
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Mar 29, 2011
Grant Date -
Oct 8, 2009
app pub date -
Apr 2, 2008
filing date -
Apr 2, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods and systems for detecting an angular position of an electric motor are disclosed, including sending an electrical pulse through a stator coil of the electric motor, determining an approximate angular position of a rotor of the electric motor in response to detecting an timing of a returning electrical pulse from the stator coil, the timing of the returning electrical pulse being indicative of the angular position of the rotor; and determining an accurate position of the rotor in response to sensing a transition of a digital sensor in response to the rotor rotating relative to the stator, the transition being indicative of the accurate position.
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