Kyoto-shi, Japan
Kyoto-shi, Japan

Nidec Corporation is a Japanese manufacturer of electric motors. Their products are found in hard-disk drives, electric appliances, automobiles and commercial and manufacturing equipment.The company has the largest global market share for the tiny spindle motors that power hard-disk drives.The two product groups with the largest sales are hard-disk drive motors and electrical and optical components with 21.5% and 30% of sales, repectively.As of 2015, the company has 230 subsidiaries companies located across Japan, Asia, Europe and the Americas. Nidec is listed on the first section of the Tokyo Stock Exchange and is a constituent of the TOPIX 100 stock market index.The company was number 42 on the 2005 edition of the Businessweek Infotech 100 list. Also Nidec was featured on the 2014 Forbes World’s Most Innovative Companies list. Wikipedia.

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Patent
Nidec Corporation | Date: 2017-01-12

A system in which the operation of an electric motor is controlled by electronically controlled switches. The system includes the motor having a run winding and a start winding, a heating component, and a motor control subsystem. A control unit closes a first switch to energize the run winding, closes a second switch to energize the start winding, determines based on an amplitude and a lag time of a current flowing through the motor whether the motor has started and is running normally, and if so, opens the second switch to de-energize the start winding and closes a third switch to activate the heating component. The control unit determines whether the motor has started and is running normally by comparing the real time amplitude and lag time of the current to a plurality of stored amplitudes and lag times associated with different operating conditions.


Patent
Nidec Corporation | Date: 2016-11-14

A motorized pump assembly includes a pump and a motor for driving the pump. The pump includes a pump housing that at least in part defines a pump chamber. The motor includes a stator, a rotor rotatable about an axis, a motor housing, and a bearing assembly. The rotor includes a motor shaft extending along the axis. The motor housing includes an endshield that at least in part defines a motor chamber in which the stator and the rotor are at least substantially received. The bearing assembly rotatably supports the motor shaft on the endshield. The pump housing and the endshield are fixed to one another and cooperatively at least in part define an overflow chamber adjacent the pump chamber. The endshield defines a drainage channel fluidly interconnected with the overflow chamber and configured to direct fluid from the overflow chamber away from the bearing assembly.


Patent
Nidec Corporation | Date: 2017-05-17

The present application provides a card reader with which it is possible to prevent a decrease in the overall inductance of coils constituting an interfering magnetic field generating means even if it is impossible to ensure ample installation space for the coils constituting the interfering magnetic field generating means, such space being in the vicinity of a card insertion opening and the vicinity of a position through which a magnetic stripe passes. A card reader (1) is provided with: a card insertion opening (3) into which a card (2) having a magnetic stripe (2a) is inserted; a card passage through which the card (2), having been inserted from the card insertion opening (3), is passed; and a disturbing magnetic field generation means (7) that generates a magnetic field for disturbing illegal reading of magnetic data recorded in the magnetic stripe (2a). The disturbing magnetic field generation means (7) is provided with a plurality of coils (11, 12) connected in series, and a drive circuit (15) that has a capacitor (19) connected in parallel to the plurality of coils (11, 12), and that supplies a current to the plurality of coils (11, 12).


Patent
Nidec Corporation | Date: 2017-02-01

A valve device is provided, so that a minute flow amount of fluid is capable of being set and a flow passage is prevented from being disturbed by a foreign matter. Specifically, the valve device includes: a drive source; a turning member, being driven and turned by the driving source; a valve body, being fixed to the turning member in a state that an end face of the valve body and an end face of the turning member in an axial direction are contacted with each other, and the valve body is integrally turned with the turning member; and a valve seat, being sliding contacted with an end face of the valve body opposite to the end face of the valve body contacting with the turning member. The valve seat has at least one outflow hole for fluid passing through the valve device, and the valve body has a throttle part which is a minute hole that communicates with the outflow hole in a part of a turning angle of the valve body. A flow passage has an opening part which is provided between opposed faces of the turning member and the valve body, so that the throttle part is communicated with an inflow hole for the fluid and so that inflow of an individual matter having a size which is unable to pass through the throttle part is shielded.


Patent
Nidec Corporation | Date: 2017-03-08

The present invention provides a geared motor in which a motor lead can be routed within a case to a position set apart from a motor, and a damper device. In the geared motor (10) that is used in the damper device, the case (3) is provided with a motor lead passage (30) that extends in the Y-direction through a position flanked, in the Z-direction, by a side plate part (321) of a case trunk part (32) and the rotation axis (L68) of a driving gear (68) that is included in a gear train (65). It is therefore possible, with the Z-direction positions of a plurality of motor leads (7) being defined, to extend the motor leads (7) in the Y-direction. The Z-direction dimension of the geared motor (10) can then be reduced because the motor leads (7) will then partially overlap the drive gear (68) in the motor lead passage (30) as viewed from the X-direction.


Patent
Nidec Corporation | Date: 2017-09-27

Provided is a motor including a shaft; two rotors attached to the shaft and spaced from each other in an axial direction by a predetermined distance; a stator arranged between the two rotors; a busbar unit arranged on one axial side of at least one of the two rotors, and arranged to hold a busbar; and a housing arranged to hold the stator and house the two rotors therein. The stator includes a plurality of cores arranged in a circumferential direction, and coils wound around the cores. A lead wire drawn out from the coils is arranged to extend, radially outside of the one of the rotors, from the corresponding core to a position on the one axial side of the one of the rotors, and is connected to the busbar at the position. The busbar unit is housed in the housing.


Patent
Nidec Corporation | Date: 2017-09-27

[PROBLEM TO BE SOLVED]: To provide a motor having a structure capable of suppressing deterioration of detection accuracy of a rotation sensor in the case of downsizing the motor in an axial direction. [SOLUTION]: A motor according to one aspect of the present invention includes: a motor main body; a power board including a switching element and electrically connected to the motor main body; a control board electrically connected to the power board and disposed on an axial counter output side of the motor main body; a control board holder attached to the motor main body to hold the control board; a sensor magnet located on a counter output side of a stator and fixed to a shaft; a rotation sensor attached to the control board to face the sensor magnet; and a power board case directly or indirectly attached to the motor main body to hold the power board. The power board is positioned radially outward of the motor main body. Board surfaces of the power board are inclined with respect to board surfaces of the control board.


Patent
Nidec Corporation | Date: 2017-09-27

[Problem] To provide a geared motor and pointer display device with which the rebound of gears can be suppressed, even if a stopper mechanism provided to a gear train is activated. [Solution] A geared motor 100 is provided with a stopper mechanism 9 which restricts the range of movement when the trailing gear 42 rotates in a counter-clockwise CCW direction. In the stopper mechanism 9, a first angle range 1 and a second angle range 2 are obtained by dividing the range of angle of rotation of the trailing side gear 42 by a virtual line L11 passing through the center of rotation of the trailing side gear 42 and the center of rotation of the driving side gear 41. In the first angle range 1 in which the stopper touching part 91 moves in a direction approaching the center of rotation of the driving side gear 41 when the trailing side gear 42 rotates in a counter-clockwise CCW direction, the stopper touching part 91 touches the part 92 to be touched by the stopper. As a consequence, when the stopper mechanism 9 is activated, the trailing side gear 42 is subjected to a reaction force in a direction moving away from the driving side gear 41, making the meshing shallower.


Patent
Nidec Corporation | Date: 2017-09-27

[Problem] To provide: a geared motor with which it is possible to suppress the rebound of gears, even if a stopper mechanism provided to a gear train is activated; and a pointer display device. [Solution] The geared motor 100 and pointer display device are provided with a stopper mechanism 9 which restricts the range of movement of the trailing-side gear 42 when the trailing-side gear 42 rotates in a counter-clockwise CCW direction. Of the stopper touching part 91 and the part 92 touched by the stopper that together constitute the stopper mechanism 9, the stopper touching part 91 comprises the end 481 of a gear-side protrusion 48 which is integrally formed with the middle part 44 at the outer peripheral surface of the middle part 44 of the trailing-side gear 42. As a consequence, the stopper touching part 91 comes into contact with the part 92 touched by the stopper at a position close to the central axis of rotation of the trailing side gear 42. Therefore, when the stopper mechanism 9 is activated, the collision energy to which the trailing side cog 42 is subjected is minimal, which makes it possible to suppress the rebound of the trailing side gear 42.


Patent
Nidec Corporation | Date: 2017-09-27

[Problem] To provide: a geared motor with which it is possible to suppress the rebound of gears, even if a stopper mechanism provided to a gear train is activated; and a pointer display device. [Solution] The geared motor 100 and pointer device are provided with a stopper mechanism 9 which restricts the range of movement of the trailing-side gear 42 when the trailing-side gear 42 rotates in a counter-clockwise CCW direction. In the stopper mechanism 9, the part 92 to be touched by the stopper comprises a support-side protrusion 28 which protrudes towards the center of rotation of the trailing-side gear 42, and the width dimension in the peripheral direction of the support-side protrusion 28 is smaller on the inside in the radial direction than on the outside in the radial direction. As a consequence, even if the width in the peripheral direction of the support-side protrusion 28 is increased to a certain extent in order to ensure strength, when the stopper mechanism 9 is activated, the stopper touching part 91 and the part 92 to be touched by the stopper come into contact at a position close to the center of rotation of the trailing-side gear 42.

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