A calibration apparatus for a rotational angle measuring system includes a measuring system shaft and a measuring system housing. The calibration apparatus includes a shaft holding device which, in a calibration position, rotates about an axis of rotation and is co-rotatably connected to the measuring system shaft, and, in a load position, is decoupled from the measuring system shaft, a rotationally static housing holding device which, in the calibration position, is co-rotatably connected to the measuring system housing, and, in the load position, is decoupled from the measuring system housing, and a drive motor which drives the shaft holding device. In the calibration position, the shaft holding device has clamping jaws which are pressable onto the radial outer side of the measuring system shaft, and/or, the rotationally static housing holding apparatus has movable pistons which are pressable onto the radial outer side of the measuring system housing.

A method for calibrating a linearization function for correcting the output of a position sensor providing a continuous output position signal, wherein the method optimizes the linearization function by defining optimal positions of the linearization points of the linearization function.

A sensing system and a method for sensing position include a first magnetic track comprising a first number of multipoles for generating a magnetic field solidarily fixed to a second magnetic track for generating a magnetic field and a second sensor for sensing magnetic field, forming a magnetic structure. At least two sensors are included. The first sensor is positioned proximal to the first magnetic track, closer to the first magnetic track than to the second magnetic track. The second sensor is positioned between the first sensor and the second magnetic track. The distance between the first sensor and the second magnetic track is larger than the distance between the second sensor and the second magnetic track. The magnetic flux density generated by the first and second magnetic tracks follow a ratio of two or more.

A calibration method in which, a rotation angle calculation device calculates a rotation angle based on a detection signal of a sensor, transmits rotation angle data indicating the rotation angle to a calibration device, and transmits time difference data relating to a time difference after having captured the detection signal until transmitting the rotation angle data to the calibration device, and in which the calibration device measures a rotation angle, clocks a measurement time at which the rotation angle is measured and a transmission time of transmitting or receiving the rotation angle data, and acquires calibration data of the rotation angle data by comparing the rotation angle measured at a time obtained by going back in time from the transmission time by the time difference after having captured the detection signal until transmitting the rotation angle data and the rotation angle data with each other.

The disclosure relates to an apparatus and a method for adapting control of a brushless electric motor in order to influence a position of an actuator, wherein at least two values of an output variable of a sensor are recorded in order to determine a position of the actuator, an item of information relating to the position of the actuator is determined on the basis of the at least two recorded values, the determined information relating to the position of the actuator is assigned to an item of information relating to a rotor position of the electric motor, wherein the at least two recorded values are recorded at two different times in a predefined interval of time, and wherein a duration of the predefined interval of time is determined on the basis of a characteristic of the electric motor.

An apparatus for determining an item of position information relating to a position of a magnetic field transducer relative to a position sensor. The position sensor is designed to generate at least one periodic measurement signal when the magnetic field transducer moves relative to the position sensor. A processing unit of the apparatus is designed to determine the position information based on a respective measurement signal value of a respective periodic measurement signal using a calibration function assigned to the respective periodic measurement signal. The assigned calibration function represents the respective periodic measurement signal using a Fourier series having a respective plurality of Fourier coefficients which differ from zero and are of an order greater than zero. The processing unit is designed to at least approximately solve the assigned calibration function for the respective measurement signal value in order to determine the position information.

Sensor device, control system and method of communication between a sensor device and a control system. Sensor devices, control systems and methods for communication between sensor devices and control systems are provided. In these, sensor data are transmitted via first interfaces and redundant sensor data and/or other data are transmitted via second interfaces.

A calibration method in which, a rotation angle calculation device (20, 30) calculates (S2) a rotation angle θc based on a detection signal of a sensor, transmits (S3) rotation angle data Dc indicating the rotation angle θc to a calibration device (40), and transmits (S3) time difference data Dt relating to a time difference after having captured the detection signal until transmitting the rotation angle data to the calibration device, and in which the calibration device measures (S1) a rotation angle θr, clocks (S1, S4) a measurement time tm at which the rotation angle θr is measured and a transmission time tt of transmitting or receiving the rotation angle data, and acquires (S5, S6) calibration data Dc of the rotation angle data by comparing the rotation angle θr measured at a time tc2 obtained by going back in time from the transmission time tt by the time difference after having captured the detection signal until transmitting the rotation angle data and the rotation angle data Da with each other.

A method for calibrating a rotary encoder for capturing rotational angle position of a machine shaft. The rotary encoder includes an exciter unit which is rotationally fixed to the machine shaft, and a stationary sensor unit which interacts therewith. The method includes rotating the machine shaft to perform a rotational movement at a predefined rotational speed at a first sensor temperature, capturing a first position measured value at a first predefined rotational angle position at the first sensor temperature, heating or cooling the sensor unit to a second sensor temperature, capturing a second position measured value at the first predefined rotational angle position at the second sensor temperature, determining a first deviation between at least the second position measured value and a first desired position measured value, and correcting an output signal from the rotary encoder via the first deviation.

A method for determining an offset of an angular position encoder is associated with a rotor of an electric machine, wherein a reference offset of a reference angular position encoder of a reference electric machine is known at a reference rotational speed and a reference current with a reference phase angle and a reference absolute value. The method includes the steps of applying a current having the reference absolute value; setting a phase angle of the current to achieve the reference rotational speed; comparing the phase angle with the reference phase angle and the reference offset; and determining the offset on the basis of this comparison.