A first sensor signal and a second sensor signal are provided by a sensor unit to an evaluation unit. The first sensor signal is dependent on the angular position and is associated with a first detection position, and the second sensor signal is associated with a second detection position lying about the rotational axis perpendicular to the first detection position. An orthogonal error is converted by the evaluation unit into an amplitude difference between respective amplitudes of the first and second sensor signals based on a coordinate transformation of the first and second sensor signals. Each of the first and second sensor signals are adjusted by the evaluation unit based on the amplitude difference. An angular position of a rotational component is determined by the evaluation unit based on output from an a tan 2-function that takes the adjusted first and second sensor signals as input.

An embodiment can provide a motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed between the shaft and the rotor; a bearing disposed between the shaft and the stator; and a base plate, wherein: the rotor includes a yoke coupled to the shaft; the base plate includes a body, a first partition protruding from the body, and a second partition extending from the first partition; the first partition is disposed between the bearing and the stator; a portion of the second partition is disposed to be overlapped with the first partition; and the first partition is in contact with the lateral surface of an outer ring of the bearing and the second partition is in contact with the one surface of the outer ring of the bearing.

An embodiment can provide a motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed between the shaft and the rotor; a bearing disposed between the shaft and the stator; and a base plate, wherein: the rotor includes a yoke coupled to the shaft; the base plate includes a body, a first partition protruding from the body, and a second partition extending from the first partition; the first partition is disposed between the bearing and the stator; a portion of the second partition is disposed to be overlapped with the first partition; and the first partition is in contact with the lateral surface of an outer ring of the bearing and the second partition is in contact with the one surface of the outer ring of the bearing.

A rotary encoder is incorporated in an annular space formed between a hollow rotating shaft and an encoder case. The rotary encoder has an annular printed wiring substrate, a plurality of mounting substrates that are outward from the printed wiring substrate in the radial direction and are arranged in the circumferential direction, and inter-substrate wiring cables bridged between the printed wiring substrate and each of the mounting substrates in the radial direction. Power supply to the mounting substrates and signal transmission and reception between the mounting substrates can be accomplished without routing around the wiring cables. It is possible to achieve a rotary encoder that is suitable for being incorporated in a narrow annular space.

A rotary encoder is incorporated in an annular space formed between a hollow rotating shaft and an encoder case. The rotary encoder has an annular printed wiring substrate, a plurality of mounting substrates that are outward from the printed wiring substrate in the radial direction and are arranged in the circumferential direction, and inter-substrate wiring cables bridged between the printed wiring substrate and each of the mounting substrates in the radial direction. Power supply to the mounting substrates and signal transmission and reception between the mounting substrates can be accomplished without routing around the wiring cables. It is possible to achieve a rotary encoder that is suitable for being incorporated in a narrow annular space.

One embodiment of a lens driving apparatus may comprise: a bobbin having a first coil disposed on the outer circumferential surface thereof; a position detection sensor which is disposed on the outer circumferential surface of the bobbin and which moves together with the bobbin; a first magnet disposed opposite to the first coil; a housing for supporting the first magnet; upper and lower elastic members which are coupled to the bobbin and the housing; and a plurality of wirings which are disposed on the outer circumferential surface of the bobbin so as to electrically connect at least one of the upper or lower elastic members with the position detection sensor.

One embodiment of a lens driving apparatus may comprise: a bobbin having a first coil disposed on the outer circumferential surface thereof; a position detection sensor which is disposed on the outer circumferential surface of the bobbin and which moves together with the bobbin; a first magnet disposed opposite to the first coil; a housing for supporting the first magnet; upper and lower elastic members which are coupled to the bobbin and the housing; and a plurality of wirings which are disposed on the outer circumferential surface of the bobbin so as to electrically connect at least one of the upper or lower elastic members with the position detection sensor.

Examples described herein provide a computer-implemented method for predicting a state of a hall sensor for a motor having a plurality of hall sensors associated therewith. The example method includes receiving a previous state of the hall sensor. The example method further includes detecting a current state of the hall sensor. The example method further includes predicting a predicted next state of the hall sensor based on the previous state of the hall sensor, the current state of the hall sensor, and a direction of a shaft of the motor.

Examples described herein provide a computer-implemented method for predicting a state of a hall sensor for a motor having a plurality of hall sensors associated therewith. The example method includes receiving a previous state of the hall sensor. The example method further includes detecting a current state of the hall sensor. The example method further includes predicting a predicted next state of the hall sensor based on the previous state of the hall sensor, the current state of the hall sensor, and a direction of a shaft of the motor.

A system and method for redundantly monitoring faultless functioning of first and second rotational speed sensors on an electric motor, where the rotational speed is to precisely determine and monitor a rotor position, where a first product is formed from a first current count of the first output signal of the first sensor and a maximum count of the second output signal, a second product is formed from a second current count of the second output signal of the second sensor and a maximum count of the first output signal, the two products are cyclically checked for equality and, in when the check is negative, an error message is generated, where the method provides the position of both sensors in a common values system and the positions can be directly compared with one another such that precise determination and monitoring of the rotor position becomes possible.