Determining rotor position offset for electrical machines
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United States of America Patent
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Apr 30, 2024
Grant Date -
Feb 1, 2024
app pub date -
Jul 27, 2022
filing date -
Jul 27, 2022
priority date (Note) -
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Abstract
A method of calibrating an electrical machine to determine an angular offset between a motor sensor indicated position and an actual rotor position, including the steps of: supplying electrical current to stator windings; identifying a quadrant of a rotor where a rotor pole is located; approximating a line between a torque value measured at a lower angular boundary of the identified quadrant and a torque value measured at an upper angular boundary of the identified quadrant; and determining an angular offset by locating an angular position where torque exerted by the rotor is zero.
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