Method for determining the angle of the rotor of an electric motor control unit and vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsJovan Knezevic, Roman Nestlinger
Life of this patent
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Abstract
A method for determining the angle of the rotor of an electric motor includes receiving a first rotor position signal from a rotor position sensor by using a control unit, the first rotor position signal including a plurality of orders; determining the angular velocity of the electric motor at least by way of the first rotor position signal by using an angular velocity module of the control unit; determining a first base signal by way of the determined angular velocity and the first rotor position signal by using a first filter module of the control unit; and determining the angle of the rotor at least by way of the determined first base signal by using an angle module of the control unit.
Claims19
A method for determining an angle of a rotor of an electric motor that has a rotor and a stator with at least one coil, the method comprising:
- obtaining a first rotor position signal from a rotor position sensor by a control unit, the first rotor position signal comprising a position value along a first of two directions in a plane of rotation of the rotor, and the first rotor position signal comprising a first number of orders,
- determining an angular velocity of the electric motor at least based on the first rotor position signal by using an angular velocity module of the control unit,
- determining a first base signal based on the determined angular velocity and the first rotor position signal by using a first filter module of the control unit,
- determining the angle of the rotor based on at least the determined first base signal by using an angle module of the control unit,
- obtaining a second rotor position signal from the rotor position sensor by the control unit, the second rotor position signal comprising a position value along a second of the two directions in the plane of rotation of the rotor, and the second rotor position signal comprising a second number of orders,
- determining a second base signal based on the determined angular velocity and the second rotor position signal by using a second filter module of the control unit, and
- determining the angle of the rotor based on at least the determined first base signal and the determined second base signal by using the angle module of the control unit.
A control unit for a vehicle, wherein the control unit is configured to perform a method for determining an angle of a rotor of an electric motor that has a rotor and a stator with at least one coil, the method comprising:
- obtaining a first rotor position signal from a rotor position sensor by a control unit, the first rotor position signal comprising a position value along a first of two directions in a plane of rotation of the rotor, and the first rotor position signal comprising a first number of orders,
- determining an angular velocity of the electric motor at least based on the first rotor position signal by using an angular velocity module of the control unit,
- determining a first base signal based on the determined angular velocity and the first rotor position signal by using a first filter module of the control unit,
- determining the angle of the rotor based on at least the determined first base signal by using an angle module of the control unit,
- obtaining a second rotor position signal from the rotor position sensor by the control unit, the second rotor position signal comprising a position value along a second of the two directions in the plane of rotation of the rotor, and the second rotor position signal comprising a second number of orders,
- determining a second base signal based on the determined angular velocity and the second rotor position signal by using a second filter module of the control unit, and
- determining the angle of the rotor based on at least the determined first base signal and the determined second base signal by using the angle module of the control unit.
Dependencies are inferred from the claim text.