A motor for sensing a rotor location is provided, the motor comprising a shaft, a sensing magnet including a main magnet and a sub-magnet coupled to the shaft and a substrate disposed on the sensing magnet. The substrate includes a plurality of first hall sensors and a plurality of second hall sensors spaced apart from the shaft by a first distance, and a plurality of third hall sensors and a plurality of fourth hall sensors spaced apart from the shaft by a second distance larger than the first distance.

A device for determining an angle of rotation and/or a torque of a rotating part, having at least one angle detector for detecting an angular position of the rotating part relative to a reference position and at least one indexer for indexing at a 360 rotation of the rotating part relative to the reference position, the angle detector having a rotor connected in a non-rotatable manner to the rotating part with a base body for attachment to the rotating part and a plurality of vanes extending radially outwardly from the base body. At least one of the vanes of the rotor have a marker detectable by means of the indexer.

A device for determining a position of a moving part, having a position detector for detecting a position of the moving part relative to a reference position, wherein the position detector has a transmitter which is fixedly connected with the moving part. The position detector is designed such that it is operable in a position detection state for detecting the position of the moving part relative to the reference position and in a power saving state to save power. A capacitive sensor includes the transmitter, and the transmitter and the remainder of the capacitive sensor are designed to coordinate with each other and are arranged in such a way that in the power-saving state of the position detector, a movement of the moving part relative to the reference position is detected by the capacitive sensor and the position detector is transferred automatically from a power-saving state to a position-detecting state.

An encoder includes a code disc and a processor communicatively coupled with the code disc. The code disc is configured to rotate along with a rotating object and includes a plurality of fan teeth extending radially. Each of the fan teeth includes a first line segment edge, a second line segment edge, and an arc edge along a circumference of the code disc and connecting the first line segment edge and the second line segment edge. The first line segment edges of the fan teeth are arranged at the code disc with equal intervals. A length of the arc edge of one of the fan teeth is different from lengths of the arc edges of other ones of the fan teeth, and the lengths of the arc edges of the other ones of the fan teeth equal each other. The processor is configured to detect a rotation of the code disc to obtain a detection signal, and obtain a rotation parameter of the rotating object based on the detection signal. The rotation parameter includes at least one of a rotation direction, a rotation speed, or a mechanical zero position.

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.

An encoder apparatus including a scale including a series of features defining at least one scale track and a readhead for reading the scale's features. The readhead includes at least one light source for illuminating the scale and at least one detector. The configuration of the at least one light source is such that there is a structure in the light projected toward the scale. The readhead is configured such that the structure is angled so that it is substantially misaligned with respect to the scale's features so as to reduce measurement error in the signal output by the readhead.

Disclosed is an angle sensor, including a gear structure (1), an eddy current probe (2) and a processing unit (3), wherein the gear structure (1) is a gear mounted and fixed on the outer circumference of a rotating shaft or a gear formed by machining on the outer circumference of the rotating shaft, and a positioning structure (P) for feature angle recognition is provided on an outer circumferential side of the gear structure (1); the eddy current probe (2) is positioned at the outer circumferential side of the gear structure (1), and the eddy current probe (2) faces a gear tooth and a tooth groove of the gear; and the processing unit (3) is connected to the eddy current probe (2) and is used for processing signals and outputting an angle measurement signal. Also disclosed is an angle measurement method.

A crank angle detection device for an engine capable of achieving downsizing and enhancing appearance of the engine is provided. A crank angle detection device for an engine that includes a pulsar ring including a plurality of detection portions and rotating coaxially with a crank shaft of the engine, and a sensor detecting a passage state of the detection portions. Here, the pulsar ring is fixed to a crank web of the crank shaft. A weight for adjusting inertia balance of the crank shaft is fixed to the crank web arranged close to an end of the crank shaft in an axial direction. The weight has a shape obtained by increasing thickness of a part of the pulsar ring.

A magnetic encoder system (2) of a sewing machine drive comprises a disk (5), which is magnetized, an incremental track (8) and a reference track (9). The incremental track (8) extends completely around the disk (5) and has alternating pole elements (10), which serve as incremental markings. The reference track (9) is designed as a ring-shaped section on the disk (5) and has a monopole (11). The result is a magnetic encoder system (2), for example for a servo motor of a sewing machine.

The invention relates to a crankshaft, transmission or camshaft sensor (10) for a motor vehicle, intended for being connected to an engine control unit (30) by a cable (20). The sensor comprises a processing module (17) and a voltage-modifying circuit (18) configured to generate an output signal via an output port (12) of the sensor (10) allowing a diagnosis module (36) of the engine control unit (30) to detect and identify faults of the sensor (10) or the cable (20). In particular, the processing module (17) is configured to provide on its output port (172), when the toothed target (14) is immobile, a predetermined pattern representing the fact that the toothed target (14) is immobile, this predetermined pattern corresponding to a status change of the output port (172) of the processing module (17) with a predetermined time and repeated periodically. The invention likewise relates to a diagnosis system (1) comprising such a sensor (10), a cable (20) and an engine control unit (30). The invention also relates to a diagnosis method (50) implemented by said diagnosis system (1).