Abstract: A rotary machine according to the present disclosure includes a stator, a rotor, a rotary shaft, and a magnetic sensor. The rotor rotates relative to the stator. The rotary shaft is coupled to the rotor and rotates as the rotor rotates. The magnetic sensor detects a position of the rotor. The rotor includes a plurality of magnets. The magnetic sensor is arranged to face the rotor in an axial direction that is parallel to the rotary shaft. The magnetic sensor detects the position of the rotor based on a magnetic field generated by the plurality of magnets of the rotor.

Abstract: In a motor including a coil and a drive magnet that applies a drive magnetic field to the coil, the drive magnet has a magnetized surface aligned with a magnetization direction and facing a coil surface and a driving direction of the motor is aligned with the magnetization direction. The driving direction is a direction in which one member selected from the coil and the drive magnet is displaced with respect to the other member. The position detection system includes a magnetic sensor and a processing circuit. The magnetic sensor includes a base member, a wiring layer disposed on a base member surface as a surface of the base member, and a bias magnet that applies a bias magnetic field to the wiring layer. The magnetic sensor is arranged such that the base member surface is parallel to the magnetization direction and perpendicular to the magnetized surface.

Abstract: A magnetic sensor includes a first half-bridge circuit, a second half-bridge circuit, and a holding member. The first half-bridge circuit includes a first magnetoresistive effect element and a second magnetoresistive effect element. The second half-bridge circuit includes a third magnetoresistive effect element and a fourth magnetoresistive effect element. The first magnetoresistive effect element detects a magnetic field aligned with an X-axis. The second magnetoresistive effect element detects a magnetic field aligned with a Y-axis. The third magnetoresistive effect element detects a magnetic field aligned with a first axis. The fourth magnetoresistive effect element detects a magnetic field aligned with a second axis.

Abstract: A magnetic sensor includes at least one bias magnet, a first half-bridge circuit, a second half-bridge circuit, and a base member. The first half-bridge circuit includes a pair of first magnetoresistive effect elements to one of which a bias magnetic field aligned with a positive direction of an X-axis is applied and to the other of which a bias magnetic field aligned with a negative direction of the X-axis is applied. The second half-bridge circuit includes a pair of second magnetoresistive effect elements to one of which a bias magnetic field aligned with a positive direction of a Y-axis is applied and to the other of which a bias magnetic field aligned with a negative direction of the Y-axis is applied.

Abstract: A magnetic sensor unit includes a magnet, a magnetic sensor facing a lower surface of the magnet, a magnetic shield surrounding the magnetic sensor in a lateral direction crossing up and down directions of the magnetic sensor, and a magnetic yoke covering an upper surface and a side surface of the magnet. The magnet includes a first magnetized region magnetized along the up and down direction, and a second magnetized region magnetized in a direction opposite to a direction of magnetization of the first magnetized region. The first and second magnetized regions have first and second magnetic poles provided on the lower surface of the magnet. A distance LA between a center of the first magnetic pole and a center of the second magnetic pole, a distance LB between the magnetic shield and the center of the first magnetic pole, a distance LC between the magnetic shield and the center of the second magnetic pole satisfy a relation of LA<LB+LC.

Abstract: A magnetic sensor includes a ceramic substrate, a GMR layer, and an undercoat layer. The ceramic substrate includes a substrate body and a glazing layer. The substrate body contains a ceramic as a material thereof. The glazing layer is formed on a surface of the substrate body. The GMR layer has a multilayer structure of a plurality of magnetic layers and a plurality of non-magnetic layers. The undercoat layer is formed between the glazing layer and the GMR layer. The undercoat layer contains a BCC solid solution.

Abstract: A magnetic scale includes a magnetic scale body and an adhesive layer. The magnetic scale body includes a magnetic substance. The adhesive layer includes a hot-melt adhesive. The adhesive layer is attached to the magnetic scale body.

Abstract: A position detection system includes a magnetic pole block and a magnetic sensor. The magnetic pole block includes a plurality of magnetic poles arranged in a first direction. The plurality of magnetic poles are arranged such that N poles and S poles are alternately arranged as the plurality of magnetic poles in the first direction. At least one member selected from the magnetic pole block and the magnetic sensor is movable in the first direction with respect to the other member. The magnetic sensor includes a plurality of magnetoresistive effect elements and a bias magnet. The plurality of magnetoresistive effect elements are arranged side by side in the first direction. The bias magnet applies, to the plurality of magnetoresistive effect elements, a magnetic field having an orientation toward one of two opposite sides of the first direction.

Abstract: A position-sensing circuit includes a processing circuit. A magnet member includes a first track having a plurality of first magnetic poles and a second track having a plurality of second magnetic poles. A magnetic pole pitch between the plurality of first magnetic poles in a sensing direction is different from a magnetic pole pitch between the plurality of second magnetic poles in the sensing direction. A magnetic sensor includes a first sensor part configured to sense magnetism produced at the first track and a second sensor part configured to sense magnetism produced at the second track. The processing circuit is configured to determine, based on information on a phase of an output of the first sensor part and a phase of an output of the second sensor part, a position of the magnetic sensor with respect to the magnet member.

Abstract: A magnetic sensor unit includes a magnet, a magnetic sensor facing a lower surface of the magnet, a magnetic shield surrounding the magnetic sensor in a lateral direction crossing up and down directions of the magnetic sensor, and a magnetic yoke covering an upper surface and a side surface of the magnet. The magnet includes a first magnetized region magnetized along the up and down direction, and a second magnetized region magnetized in a direction opposite to a direction of magnetization of the first magnetized region. The first and second magnetized regions have first and second magnetic poles provided on the lower surface of the magnet. A distance LA between a center of the first magnetic pole and a center of the second magnetic pole, a distance LB between the magnetic shield and the center of the first magnetic pole, a distance LC between the magnetic shield and the center of the second magnetic pole satisfy a relation of LA<LB+LC.

Abstract: A magnetic sensor includes a first magnetoresistive element that detects a magnetic field along a first detection axis, a second magnetoresistive element that detects a magnetic field along a second detection axis inclining at an angle of 45 degrees with respect to the first detection axis, a first Hall element that detects a magnetic field along a third detection axis, and a second Hall element that detects a magnetic field along a fourth detection axis perpendicular to the third detection axis. This magnetic sensor has both characteristics of the Hall elements and characteristics of the magnetoresistive elements, and has high accuracy and a small size.

Abstract: A magnetic sensor includes a magneto-resistive element, a Hall element, and a detection circuit that receives a signal from the magneto-resistive element and a signal from the Hall element input thereto. The detection circuit includes an output terminal and an interrupt generation unit. The output terminal outputs, to the outside as an output signal, a signal obtained by performing to the signal input from the magneto-resistive element, at least one processing selected from amplification, analog-to-digital conversion, offset correction, and temperature-characteristics correction. The interrupt generation unit outputs an interrupt signal when the signal input from the Hall element is larger than a predetermined threshold. The magnetic sensor is high accurate and highly reliable.

Abstract: A magnetic sensor includes a first magnetoresistive element that detects a magnetic field along a first detection axis, a second magnetoresistive element that detects a magnetic field along a second detection axis inclining at an angle of 45 degrees with respect to the first detection axis, a first Hall element that detects a magnetic field along a third detection axis, and a second Hall element that detects a magnetic field along a fourth detection axis perpendicular to the third detection axis. This magnetic sensor has both characteristics of the Hall elements and characteristics of the magnetoresistive elements, and has high accuracy and a small size.

Abstract: A magnetic sensor includes a first magnetoresistive element that detects a magnetic field along a first detection axis, a second magnetoresistive element that detects a magnetic field along a second detection axis inclining at an angle of 45 degrees with respect to the first detection axis, a first Hall element that detects a magnetic field along a third detection axis, and a second Hall element that detects a magnetic field along a fourth detection axis perpendicular to the third detection axis. This magnetic sensor has both characteristics of the Hall elements and characteristics of the magnetoresistive elements, and has high accuracy and a small size.

Abstract: A magnetic sensor includes a magneto-resistive element, a Hall element, and a detection circuit that receives a signal from the magneto-resistive element and a signal from the Hall element input thereto. The detection circuit includes an output terminal and an interrupt generation unit. The output terminal outputs, to the outside as an output signal, a signal obtained by performing to the signal input from the magneto-resistive element, at least one processing selected from amplification, analog-to-digital conversion, offset correction, and temperature-characteristics correction. The interrupt generation unit outputs an interrupt signal when the signal input from the Hall element is larger than a predetermined threshold. The magnetic sensor is high accurate and highly reliable.

Abstract: A magnetic sensor includes a board, a magnetoresistance element group including first and second magnetoresistance elements disposed on the board, and a magnet group including a first magnet corresponding to the first magnetoresistance element and a second magnet corresponding to the second magnetoresistance element. This magnetic sensor can have a small size and high accuracy.

Abstract: A magnetic sensor includes a first magnetoresistive element that detects a magnetic field along a first detection axis, a second magnetoresistive element that detects a magnetic field along a second detection axis inclining at an angle of 45 degrees with respect to the first detection axis, a first Hall element that detects a magnetic field along a third detection axis, and a second Hall element that detects a magnetic field along a fourth detection axis perpendicular to the third detection axis. This magnetic sensor has both characteristics of the Hall elements and characteristics of the magnetoresistive elements, and has high accuracy and a small size.

Abstract: A magnetic sensor includes a board, a magnetoresistance element group including first and second magnetoresistance elements disposed on the board, and a magnet group including a first magnet corresponding to the first magnetoresistance element and a second magnet corresponding to the second magnetoresistance element. This magnetic sensor can have a small size and high accuracy.

Abstract: A magnetic sensor includes a substrate, a magnetoresistive element group, and a magnet group. The substrate has a first surface and a second surface opposite to the first surface. The magnetoresistive element group includes a first magnetoresistive element and a second magnetoresistive element. The first magnetoresistive element and the second magnetoresistive element are located on the first surface of the substrate. The magnet group includes a first magnet opposing the first magnetoresistive element and a second magnet opposing the second magnetoresistive element.

Abstract: A magnetic sensor has a first tube-shaped bias magnet and a first magnetic sensor element. The first tube-shaped bias magnet has a bottom face, a top face facing the bottom face, and an outer side surface and an inner side surface both located between the bottom face and the top face, and includes an N pole formed by magnetizing one of the bottom face and the top face and an S pole formed by magnetizing a remaining one of the bottom face and the top face. The first magnetic sensor element is located in an inner space surrounded by a plane including the bottom face, a plane including the top face, and the inner side surface. The magnetic sensor can detect intensity of an external magnetic field with high accuracy.