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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Provided are a magnetic field generator, a control method for magnetic field generator, and a magnetic recording medium processing device, with which an interfering magnetic field can be generated continuously and efficiently. Specifically, the magnetic field generator has: a magnetic field generation part 51 comprising a resonance part in which a coil (inductor) L51 and a capacitor C51 are connected with each other and which is structured so that an AC current is flowed between the inductor and the capacitor by charging electric charge to the capacitor and discharging the electric charge to generate a magnetic field by a resonance; a current direction monitoring section which monitors a direction of a current flowing through the inductor of the magnetic field generation part 51; and a judging section 523 which controls a timing for charging in the magnetic field generation part depending on the direction of the current flowing through the inductor which is obtained by monitoring of the current direction monitoring section.


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: 2017-01-12

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: 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: 2017-06-14

[Problem] To provide a valve device in which, even when fluid flowback occurs, the amount of fluid flowback entering the valve device and the amount of outflow from an inflow hole can be mitigated, and damage to an elastic member for biasing a valve body can be prevented. [Solution] A valve device equipped with: a drive source; a base having a valve seat surface in which a fluid inflow hole and outflow hole are formed; a case body covering the valve seat surface-side of the base, and defining a valve chamber (36) together with the base; a first valve body (20a) for opening and closing the outflow hole; and a second valve body (20b) for opening and closing the inflow hole. The output part of the drive source, the first valve body (20a), and the second valve body (20b) are housed in the valve chamber (36). The first valve body (20a) is a substantially cylindrical member, one end surface of which is in sliding contact with the peripheral edge of the outflow hole in the valve seat surface. The first valve body (20a) receives the driving force of the drive source and pivots such that the outflow hole is switched between a closed state and a fully or partially opened state.


Patent
Nidec Corporation | Date: 2017-06-07

The present application provides a linear actuator that can generate an adequate vibration of a movable element even with a limited number of constituent parts. Specifically to describe, in a linear actuator 1, a movable element 6 is provided with a permanent magnet 53 being cylindrical, while a coil 55 is wound around a coil bobbin 3 that surrounds the permanent magnet 53 at an outside in a radial direction, in a stationary element 2. The movable element 6 is provided with a first core 71 and a second core 72 at both sides in a direction of an axis line L of the permanent magnet 53, so that a density of magnetic flux in linkage with the coil 55 is high. The spring member 8 is connected to the coil bobbin 3, while the movable element 6 is supported by the spring member 8, at an outside in a radial direction of the permanent magnet 53. Accordingly, the movable element 6 is supported in a stable condition by the spring member 8.


Patent
Nidec Corporation | Date: 2017-02-21

A centrifugal fan may include an impeller arranged to rotate about a rotation axis, an impeller case arranged to accommodate the impeller, a motor arranged to rotate the impeller, and a motor case arranged to accommodate the motor. The impeller may include a boss portion joined to a shaft arranged to rotate about the rotation axis, a hub arranged to extend radially outward from the boss portion, and a plurality of blades. Each blade may be arranged to extend radially outward. An inner wall of the impeller case may include an inside surface extending radially outward along an upper end portion of each blade. A side end portion of an air inlet defined in a central portion of the impeller case may include a curved surface projecting radially inward.


Patent
Nidec Corporation | Date: 2017-03-06

A teaching method for an industrial robot may include, while the hand is lifted up and down by the lifting mechanism, detecting, with the first sensor, a position of either the installation unit or a teaching jig to be installed on the installation unit in a vertical direction; while the hand is transferred in the first direction by the transfer mechanism, detecting, with the first sensor, a position of either the installation unit or the teaching jig in the first direction; while the hand is transferred in the first direction by the transfer mechanism, detecting, with the second sensor, a position of either the installation unit or the teaching jig in the first direction; and calculating a position of either the installation unit or the teaching jig in the second direction, in order to teach a position of the transfer object to be installed on the installation unit.


Patent
Nidec Corporation | Date: 2017-07-12

Provided is an MR sensor for a card reader which can detect whether magnetic data is recorded on a magnetic stripe on a card when mounted in a card reader, and yet is able to prevent a criminal from illegally obtaining magnetic information, and with which the cost can be reduced. This MR sensor (10) is equipped with resistors (R1, R2) series-connected to each other and arranged at a position traversed by a first track (2c), and resistors (R3, R4) series-connected to each other and arranged at a position traversed by a second track (2d). The resistors (R2, R4) are connected to a power supply, and the resistors (R1, R3) are grounded. With this MR sensor (10), the difference in potential between a first center point (C1) between the series-connected resistors (R1 and R2) and a second center point (C2) between the series-connected resistors (R3 and R4) is the output.


Patent
Nidec Corporation | Date: 2017-08-09

A friction-type continuously variable transmission includes first to third rolling elements 31 to 33 each of which is annular and is centered on a principal axis J, planetary rollers 20 arranged in a circumferential direction about the principal axis J, support pins 21 arranged to rotatably support the planetary rollers 20, and a planetary roller support portion 22 arranged to support each support pin such that the support pin is capable of inclining in a section including the principal axis J. Each planetary roller 20 includes a recessed portion 230 in the shape of a circular ring in an outer circumference thereof centered on the support pin 21. The first rolling element 31 is arranged to make contact with a rolling contact surface 23 of the planetary roller 20 from one side in a radial direction axially below the recessed portion 230. The first rolling element 31 is arranged to make contact with the rolling contact surface 23 of the planetary roller 20 from the one side in the radial direction axially above the recessed portion 230. The third rolling element 33 is arranged to make contact with the recessed portion 230 of the planetary roller 20 from an opposite side in the radial direction, and is supported to be capable of moving in a vertical direction relative to the planetary roller support portion 22.

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