Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Schaeffler Technologies Ag & Co .Kg

Sven-Jostein Kro

Reinhard Berger

Martin Zimmermann

Thomas Pfund

Juergen Gerhart

Martin Fuss

Wai-Wai Buchet

Jürgen Gerhart

Wai-Wal Buchet

Martin Fuß

An actuator for a clutch or gear mechanism in a motor vehicle comprises an electric motor and an incremental encoder. The encoder comprises a position measurement signal output at which a position measurement signal can be output which has a number of different signal states, each of which is assigned to a relative position between a primary part and a secondary part of the electric motor. For the commutation of the electric motor, the position measurement signal output is connected to a position measurement signal input of a control device for a motor winding of the electric motor. The control device comprises a device for checking the plausibility of the position measurement signal and is designed in such a manner that on the occurrence of an implausible signal state the power supply to the electric motor is disconnected and/or the power of the electric motor is limited.

Actuator for the actuation of a clutch and/or a gear mechanism

The invention relates to a method for triggering an electric motor, in particular, an electrically conducting motor with a rotor, where an emergency run is performed as a function of the presence of at least one erroneous sensor signal. The invention also relates to a method for the correction of the counting of the increments in the course of an incremental path measurement to determine the position of a servo component that can be driven by the electric motor as a function of the presence of at least one erroneous sensor signal. The invention also relates to a device containing an electric motor with a rotor and with electronic sensors to acquire the position and direction of rotation of the rotor, whereby the electric motor can be triggered according to the disclosed method whereby the electric motor can be triggered as a function of the presence of at least one sensor signal error in the course of an emergency run.

Method and device for triggering an electric motor

In a method for operating an electronically commutated (EC) motor that has a primary part having a coil and a secondary part having magnet segments, a measuring sequence is determined that has a plurality of measured value combinations, which are a function of the relative position between secondary part and primary part and each of which includes a number of measured values that corresponds to the number of magnetic fields sensors that are used for the determination. The coil is supplied with power as a function of the measured value combinations. The absolute position of the secondary part is determined by positioning of the secondary part at a reference position and by an absolute position value being tracked at each change of the measured value combination starting from a reference position value. For a relative movement between the secondary part and the primary part oriented in a prescribed direction, a reference sequence is determined and stored in memory that comprises a plurality of setpoint value combinations to be cycled through in succession and has a number of setpoint values corresponding to the number of magnetic field sensors. Based on the reference sequence of the measured value combination that occurred at the reference position and the number of changes in the measured value combination that occurred, the setpoint value combination is determined and compared to the measured value combination determined for the relevant absolute position value. When a deviation occurs, a fault condition is detected.

Method for operating an electronically commutated (EC) motor

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Ottersweier, Germany

Sven-Jostein Kro