21 patents
Utility
Rotor and brushless motor
12 Sep 23
A rotor applied to an inner rotor brushless motor includes: a rotor core having a laminate of a plurality of annular thin plate-shaped core pieces, the rotor core being configured to rotate together with a shaft in an integrated manner; a cylindrical resin magnet mounted on an outer peripheral surface of the rotor core via a gap; a groove-shaped adhesive admission portion in a straight line along the entire length of the rotor core in an axial direction thereof, the adhesive admission portion being recessed into the outer peripheral surface of the rotor core; and an adhesive configured to bond and fix the rotor core and the magnet.
Kenji Shiraki, Katsuhito Nishizawa, Shou Kubota, Yuhei Ito
Filed: 27 Aug 21
Utility
Brushless motor
1 Aug 23
Kenji Shiraki, Katsuhito Nishizawa, Shou Kubota, Takuya Takahashi
Filed: 27 Aug 21
Utility
Reduction gear and geared motor
14 Feb 23
A reduction gear configured to decelerate and output rotation of a motor includes two-stage planetary gear mechanisms that are provided side by side in an axial direction of the motor and are each configured of helical gears, and a case made of resin and formed into a cylindrical shape, the case incorporating the two-stage planetary gear mechanisms.
Masakazu Suwa, Takao Mitsumizo
Filed: 25 Jan 21
Utility
Reduction gear and geared motor
13 Dec 22
A reduction gear configured to decelerate and output rotation of a motor by two-stage planetary gear mechanisms disposed side by side in an axial direction includes: a case made of resin, the case being formed into a cylindrical shape in which the two-stage planetary gear mechanisms are incorporated, and having at least one of a lid portion and a bottom portion provided at each of both axial ends; and a reinforcing component that is formed of a material having a Young's modulus higher than a Young's modulus of a material of the case.
Masakazu Suwa, Takao Mitsumizo
Filed: 20 Jan 21
Utility
Motor
1 Nov 22
A motor includes a case; and a partition that is fitted into the case and has an easily deformable part formed on an outer peripheral surface for dispersing and dissipating vibration transmitted between the case and the partition.
Kunihiro Kuwano, Takashi Muramoto
Filed: 5 Mar 20
Utility
Sensor magnet of motor having a fixing portion to press-fit to a shaft without a sensor magnet holder
15 Mar 22
An annular sensor magnet to be fixed to a motor shaft by a press-fit includes an annular portion having magnetic poles alternately formed in an outer peripheral portion.
Kazuyuki Yamamoto, Satoshi Kikuchi
Filed: 18 Jul 18
Utility
Decelerator-equipped motor unit
2 Nov 21
Provided is a decelerator-equipped motor unit which can achieve cost reductions in the control board and improvement of both mechanical and electrical reliability through a particular arrangement of elements on the board, thereby achieving a smaller size by realizing an appropriate board shape without increasing the size of the unit.
Junya Kurata, Satoshi Kikuchi, Bjoern Schmitz, Erwin Kessler, Gebhard Hopfmueller
Filed: 31 Jul 18
Utility
Drive unit and motor system for brushless DC motors
6 Jul 21
A waveform control unit outputs a signal for driving a brushless DC motor by intermediate value energization to a waveform output unit, and outputs a signal for driving a brushless DC motor by sine wave energization to the waveform output unit when the signal in which the rotation position of the rotation reference is detected is acquired from the element, and the waveform control unit applies voltage corresponding to a sine value of an angle of a winding of one phase of n-phase windings when the brushless DC motor is to be driven by intermediate value energization, and outputs a signal for applying voltage corresponding to a sine value of an angle having similar phase difference as the sine wave energization drive with respect to the angle to the rest of the windings.
Shunpei Fujii
Filed: 2 Mar 20
Utility
Stator manufacturing method, stator, and motor
1 Jun 21
A method includes forming a first wire layer wound on the insulator and a second wire layer wound on the first wire layer by winding the wire on the insulator.
Yuya Iwasaki
Filed: 21 Aug 18
Utility
Bearing unit and motor
19 Jan 21
A bearing unit includes: an impregnated bearing that rotatably supports a shaft of a rotor; a storage part which is formed in a manner that an end surface of a housing incorporating the rotor in an axial direction becomes convex toward an outer side and which stores the impregnated bearing in a non-rotatable manner; and an oil return washer which is placed to face an end surface of the impregnated bearing stored in the storage part and which integrally rotates with the shaft.
Shinya Iio, Yoshinobu Katsuta, Satoshi Shimuzu
Filed: 27 Sep 19
Utility
Gear box, reduction gear equipped with gear box, motor unit, mold for manufacturing gear box, and manufacturing method of gear box
19 Jan 21
A gear box includes a gear box body, and a terminal which is integrated with the gear box body.
Makoto Takeda
Filed: 19 Feb 19
Utility
Resolver having decreased permanence error due to harmonic components
24 Aug 20
A resolver includes a resolver rotor fixed to a rotating shaft, and a resolver stator disposed around the resolver rotor.
Shigeru Yamamoto
Filed: 31 May 18
Utility
Reverse rotation prevention mechanism and motor with reducer
3 Aug 20
A reverse rotation prevention mechanism is provided on a torque transmission path between an output shaft and a driving shaft of a motor.
Ryoichi Sugita, Toru Imai
Filed: 21 Aug 17
Utility
Rotation speed calculation device
27 Jul 20
A rotation speed calculation device of a brushless motor includes: a current acquisition unit that acquires magnitude of current flowing through a coil of the brushless motor; a supply voltage acquisition unit that acquires supply voltage supplied to the brushless motor; and a calculation unit that calculates rotation speed of the brushless motor based on the magnitude of the current acquired by the current acquisition unit, the supply voltage acquired by the supply voltage acquisition unit, and a voltage equation calculating the rotation speed based on the magnitude of the current and the supply voltage.
Shumpei Fujii
Filed: 1 Oct 18
Utility
Structure of electrical connection portion, rotor and motor that apply same structure, and method for forming electrical connection portion
6 Jul 20
The present invention is a structure of an electrical connection portion formed by thermal bonding of a terminal 53 of a current-carrying component 50 of a motor and a winding wire 30.
Shou Nakayama, Yoshiaki Maeda, Takeshi Hirano, Kenji Muneda, Keishirou Maki
Filed: 12 Sep 17
Utility
Motor control device, motor device, and program
4 May 20
A motor control device includes: a rotational position calculator that calculates a rotational position of a motor that rotates a rotor; an operation state controller that controls a state of supply of operation power to the rotational position calculator; a deviation calculator that calculates a deviation of a rotational position of the rotor on the basis of a stop target rotational position of the rotor and the rotational position of the rotor after supply of a drive current to a coil is stopped and before supply of operation power to the rotational position calculator is stopped; a storage controller that stores the deviation on a storage; a rotational position control signal generator that generates a rotational position control signal for controlling the rotational position of the rotor on the basis of the deviation stored on the storage and the stop target rotational position of the rotor; and a drive current output unit that outputs the drive current to the coil on the basis of the rotational position control signal after supply of operation power to the rotational position calculator is restarted by the operation state controller.
Kazuki Fukuhara, Kentaro Sakamoto
Filed: 25 Sep 18
Utility
Brushed motor
27 Apr 20
Provided is a brushed motor in which noise in a high rotational speed range is effectively decreased.
Yasuhiro Hashimoto, Hideyuki Uzawa, Yasuhiro Yamagata
Filed: 22 May 18
Utility
Sensor magnet holder, magnet fixing structure, and motor
10 Feb 20
A sensor magnet holder is used to fix a sensor magnet to a motor shaft.
Kazuyuki Yamamoto, Satoshi Kikuchi
Filed: 15 Aug 17
Utility
Motor
10 Feb 20
A motor includes: a cylindrical housing that houses a rotor; a first member mounted to an opening of the housing; and a second member sandwiching the first member as mounted between the second member and the housing.
Yasuhiro Yamagata, Isao Kubota
Filed: 23 Nov 15
Utility
Composition for bonded magnets, bonded magnet and integrally molded component
16 Dec 19
A composition for bonded magnets according to the present invention contains from 88% by mass to 91% by mass (inclusive) of a samarium-iron-nitrogen magnet powder having an average particle diameter of from 1.8 μm to 2.8 μm (inclusive), from 0.5% by mass to 2.5% by mass (inclusive) of a polyamide elastomer having a tensile elongation at break of 400% or more and a bending modulus of elasticity of 100 MPa or more, from 0.5% by mass to 2.0% by mass (inclusive) of carbon fibers having fiber diameters of from 10 μm to 12 μm (inclusive) and from 0.3% by mass to 1.0% by mass (inclusive) of a carboxylic acid ester, with the balance made up of a polyamide resin which is composed of a polyamide 12 having a weight average molecular weight (Mw) of from 4,500 to 7,500 (inclusive) as determined by molecular weight distribution measurement.
Hideki Matsuda, Kenji Muraoka, Toshiya Iwai, Junichi Ishii, Atsushi Kawamoto, Naoki Kitahara, Isao Shibuya, Yasuhiro Yamagata
Filed: 8 Jul 15