Schaeffler Technologies Ag & Co .kg

Markus Dietrich

Martin Zimmermann

Matthias Gramann

Laszlo Man

Peter Greb

Dirk Reimnitz

Karl-Ludwig Kimmig

Julian Botiov

Wai-Wai Buchet

Viktor Franz

Jurgen Gerhart

Oliver Rink

Christian Brunner

Stefan Schmaus

Francis Moebs

Jörg Merkle

Didier Zaegel

Florian Zeller

Simon HÖR

Benjamin Messmer

An electric motor having a stator and a rotor rotatably mounted about a rotational axis relative to the stator is disclosed. The rotor additionally has a main part, multiple magnet elements which are distributed along the circumferential direction and are received on a radial face of the main part in a mutually spaced manner, and a burst-protection sleeve which covers the main part and the magnet elements. The burst-protection sleeve has multiple cover segments, each of which directly contacts a magnet element, and multiple bridging regions which connect two adjacent cover segments together, wherein the burst-protection sleeve is used to directly support the magnet elements relative to the main part, and the bridging regions have a lower degree of flexural strength in the circumferential direction than the cover segments.

Electric motor having a rotor with a burst-protection sleeve without an adhesion of the magnet elements

A method for setting a gain of a magnetic field sensor includes providing the magnetic field sensor and an evaluation unit on a same printed circuit board, generating a magnetic field signal with the magnetic field sensor, transmitting the magnetic field signal to the evaluation unit, evaluating the magnetic field signal with the evaluation unit, and transmitting a signal for setting the gain from the evaluation unit to the magnetic field sensor. In an example embodiment, the magnetic field sensor is a rotor position sensor of an electric motor.

Method and apparatus for setting a gain at an installed magnetic field sensor

A method for maintaining a detected absolute position of an electric motor operating as an actuator during a critical operation involves the electric motor () being controlled by a controller () which is supplied with energy from an energy source. In the method, with which an absolute value sensor can be omitted, the absolute position of the electric motor () is measured during the operation thereof, wherein rotations of the electric motor () are detected. The rotations are counted, and a count value is output to a microprocessor () of the controller () in order to actuate the electric motor (), and in the event of a critical operation, the currently detected count value is maintained by means of an independent voltage supply ().

Method and device for maintaining a detected absolute position of an electric motor operating as an actuator during a critical operation

A device having two mutually spaced sensor loops is provided. The device includes a magnetostrictive sensor structure coupled to a plurality of transmitters and a plurality of receivers, and along which a magnet that is secured to the rotating component moves. Each sensor loop has a shape corresponding to a rotating direction of the rotating component. Two saturation zones are in both sensor loops. Each transmitting element is provided for simultaneously coupling two current pulses in opposite direction into one respective sensor loop. Each receiving element is positioned to receive a reflected pulse by the magnet at the respective saturation zone. The receiving elements are connected to evaluation electronics configured to for determine an angular position of the rotating component based on transit times for the current pulse to travel along the respective sensor loop from the respective transmitting element to the respective saturation zone and for each reflected pulse to travel along the respective sensor loop from the respective saturation zone to the respective receiving element.

Device having two mutually spaced sensor loops for determining the angle of a rotating component

A method is for calibrating a multiturn sensor for determining the position of a spindle of a clutch actuator, in which the multiturn sensor () is operatively connected to a magnetic field of a permanent magnet () in that the multiturn sensor () is combined with an actuator transmission () which comprises a spindle () bearing the permanent magnet (). In a calibration method which can be carried out particularly quickly and cost-effectively, during the assembly of the multiturn sensor (), arranged on a carrier element (), with the actuator transmission () bearing the spindle (), the multiturn sensor () is operated outside its specified rotational range (0, n), wherein a position, set by actuating the actuator transmission (), of the spindle () bearing the permanent magnet () provided for an operating case of the clutch actuator (), is assigned to a specified end position of the rotational range (0, n) of the multiturn sensor (), as a result of which a magnetic field of the permanent magnet () is aligned with the multiturn sensor ().

Method for calibrating a multiturn sensor for determining the position of a spindle of a clutch actuator

A method for operating an actuator arrangement for a clutch operating system includes providing an actuator arrangement with a transmission, a piston, and an inductive sensor device. The transmission has an electric motor and a metal lead screw that converts a rotary motion into a linear motion. The piston is connected to the metal lead screw. The method also includes energizing the electric motor to linearly displace the metal lead screw in an axial direction, axially displacing the piston with the metal lead screw, using the metal lead screw as a target for the inductive sensor device, and using the inductive sensor device to determine an axial distance traveled by the piston.

Method for operating an actuator arrangement for a clutch operating system, and actuator arrangement

The invention relates to a method for determining the absolute position of a component of an actuator rotating about a rotational axis, in particular a clutch actuator, wherein the component has a co-rotating magnetic element (), and the absolute position of the magnetic element () is detected by way of a multi-turn sensor () located opposite the magnetic element (), which is supplied with a voltage. In a method, in which the absolute position can be detected without great constructional effort, a position of the magnetic element () is monitored by a Wiegand wire unit (), which detects a movement of the component when the actuator () is turned off, and if a movement is detected, transmits a voltage pulse to the multi-turn sensor () for measuring the current position of the component.

Method and device for determining the absolute position of a component of an actuator rotating about a rotational axis, in particular a clutch actuator

An angle-measuring device is provided for a rotationally-driven linear actuator, which can be implemented into a clutch actuator. A rotor element has an axis of rotation and rotates concentrically with a rotor of a rotary drive for an axially movable linear actuator element. A measurement magnet arrangement is fixed relative to the rotor element and has a polarization. The polarization is oriented in such a way that the magnetic field lines can change with a rotation of the rotor element so as to enable the angle to be precisely determined from at least one measurement position. At one location, a 360-degree sensor is provided for measuring angular positions based on the measurement magnet arrangement. At another location, a revolution-counting sensor is provided for counting a number of revolutions carried out based on the measurement magnet arrangement.

Angle-measuring device for a rotationally driven linear actuator

A method for operating a rotation sensor comprising at least four magnetoresistive sensor elements is described. Each sensor element comprises a packet of a ferromagnetic reference layer and a sensitive ferromagnetic layer and a non-magnetic layer separating the reference layer from the sensitive layer. The layers are designed such that the orientation of the magnetization in the respective layer is possible in the longitudinal direction of the layer. The at least one sensor element is formed in a plane in a spiral form with at least one complete winding and the windings are implemented concentrically. The sensor element is bent into a winding in different segments. Adjacent segments enclose an angle between them and each complete winding comprises a predetermined number of segments.

Method for operating a rotation sensor and corresponding rotation sensor

The invention relates to a method for determining and/or controlling a position of an electric motor, in particular in a clutch actuation system of a motor vehicle, wherein the position of a rotor of the electric motor is picked up by a sensor system situated on a stator of the electric motor outside an axis of rotation of the electric motor, and the position signal picked up by the sensor system is analyzed by an analysis unit. In a method in which the rotor position is detected with a high level of certainty, the position signal is transmitted to the analysis unit depending on a transmission distance between the sensor system and the analysis unit by means of an SPI protocol signal for short transmission distances, and/or by means of a PWM signal for longer transmission distances.

Method for determining and/or controlling a position of an electric motor

The invention relates to a method for determining a fault in an electronically commutated electric motor, in which at least one stator coil of the electric motor is connected in parallel in each motor phase, in which a motor phase is energized and the current flowing through this motor phase is measured. In a method in which a defect in the electric motor is identified reliably, the three motor phases are energized one after the other and the current occurring during this energization of the individual motor phases is measured, wherein the currents measured in the three motor phases are compared with one another and a defect in the electric motor is identified if the measured currents differ from one another.

Method for determining a fault in an electronically commutated electric motor

The invention relates to a method for identifying the position of a rotor of an electric motor, in which method a target arranged on a rotor is sensed using a sensor. In a method which can be carried out cost-effectively and nevertheless delivers highly accurate sensor signals, a rotational movement of the rotor is detected using an inductive or a capacitive sensor.

Method for identifying the position of a rotor of an electric motor, target for determining the position of a rotor of the electric motor and electric motor

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Oberkirch, Germany

Markus Dietrich