System and method for aligning a resting rotor to a known position
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United States of America Patent
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Nov 19, 2013
Grant Date -
May 30, 2013
app pub date -
Jan 22, 2013
filing date -
Nov 18, 2009
priority date (Note) -
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Abstract
A system and method are presented for aligning a rotor in a motor. The motor may include the rotor and a plurality of pairs of electromagnets. One or more pairs of electromagnets may be excited at a first excitation level. The one or more pairs of electromagnets may be less than all of the plurality of pairs of electromagnets. The excitation of the one or more pairs of electromagnets may be increased to a second excitation level over a first period of time. The excitation of the one or more pairs of electromagnets may be decreased to a third excitation level over a second period of time. Exciting the one or more pairs of electromagnets, increasing the excitation, and decreasing the excitation may cause the rotor to stop in a known position.
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