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.

Abstract: A method for operating a separately excited electric motor, which includes a rotor and a stator, includes the following: determining an electrical characteristic variable of the rotor and an electrical characteristic variable of the stator, calculating an initial setpoint voltage value for the stator based on a setpoint current value, a measured current value, and the determined electrical characteristic variables of the rotor and the stator, checking, based on the calculated initial setpoint voltage value, whether there is an electrical fault, in particular a shorted coil, at the rotor, and providing a fault message and/or disconnecting the electric motor if a fault has been identified.

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.

Abstract: A method for operating a separately excited electric motor, which includes a rotor and a stator, includes the following: determining an electrical characteristic variable of the rotor and an electrical characteristic variable of the stator, calculating an initial setpoint voltage value for the stator based on a setpoint current value, a measured current value, and the determined electrical characteristic variables of the rotor and the stator, checking, based on the calculated initial setpoint voltage value, whether there is an electrical fault, in particular a shorted coil, at the rotor, and providing a fault message and/or disconnecting the electric motor if a fault has been identified.

Abstract: An electric motor assembly (10), in particular for driving a vehicle, comprises an electric motor (12), a magnetic sensor (46) and a shield (14), the electric motor (12) being equipped with a stator (16), a rotor (18) and at least one magnet (28) which is connected to the rotor (18) for conjoint rotation therewith and generates a measuring magnetic field (MM). The magnetic sensor (46) is located in the measuring magnetic field (MM) and is connected to the shield (14), and the shield (14) has high magnetic permeability and is closed in the area of the magnetic sensor (46).

Abstract: An electric motor assembly (10), in particular for driving a vehicle, comprises an electric motor (12), a magnetic sensor (46) and a shield (14), the electric motor (12) being equipped with a stator (16), a rotor (18) and at least one magnet (28) which is connected to the rotor (18) for conjoint rotation therewith and generates a measuring magnetic field (MM). The magnetic sensor (46) is located in the measuring magnetic field (MM) and is connected to the shield (14), and the shield (14) has high magnetic permeability and is closed in the area of the magnetic sensor (46).

Abstract: A method and a device are disclosed for monitoring and compensating an electric machine of an electrically driven vehicle. The method includes the following steps: determining a first value of a position of a rotor using an angle sensor when the rotor is in a first position; determining a second value of the position of the rotor using an injection method when the rotor is in the first position; determining a first difference between the first value and the second value of the position of the rotor at the first position of the rotor; and checking whether the first difference falls below a predetermined threshold.

Abstract: A method and a device are disclosed for monitoring and compensating an electric machine of an electrically driven vehicle. The method includes the following steps: determining a first value of a position of a rotor using an angle sensor when the rotor is in a first position; determining a second value of the position of the rotor using an injection method when the rotor is in the first position; determining a first difference between the first value and the second value of the position of the rotor at the first position of the rotor; and checking whether the first difference falls below a predetermined threshold.