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US 10,948,314 B2Granted
Position detector
AssigneeStratec SE
InventorsReinhard Hartmann, Rüdiger Retzlaff, Oliver Bürk, Uwe Maschke
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Abstract
A method for determining the position of a rotor in an electronically commuted motor. The method comprises the steps of calculating the rotation angle using three Hall-sensors; identifying and correcting phase errors; and determining and correcting cyclic errors.
Claims8
A method for determining the position of a rotor in an electronically commuted motor, comprising the steps of
- bringing the rotor of a new or successful maintained motor to a speed using a constant motor voltage for obtaining a precise concentricity;
- measuring deviations of actually measured positions from an ideal straight line using three Hall-sensors for obtaining sinus signals
- calculating the rotation angle by using a Clarke transformation for converting the three sinus signals, which are constantly checked for their minimums and maximums, from the Hall-sensors into a rotation angle;
- identifying and correcting phase errors;
- determining and correcting cyclic errors.
2 more elements
Dependencies are inferred from the claim text.