532 patents
Utility
Motor and axial fan
16 Jan 24
A motor includes a rotor rotatable about a center axis extending vertically, a stator to rotate the rotor, and a housing covering the rotor and the stator from a radially outer side.
Atsushi Michishita, Yuta Yamasaki, Hirofumi Yoneda
Filed: 18 Oct 22
Utility
Drive apparatus
16 Jan 24
A drive apparatus includes a motor that has a motor shaft extending in an axial direction, a transmission mechanism that is connected on one side in the axial direction of the motor shaft, a lock mechanism that restricts driving of the transmission mechanism, a housing that houses the motor, the transmission mechanism, and the lock mechanism, an oil that is stored in the housing, and an oil passage that circulates the oil.
Shuhei Nakamatsu, Shinsuke Mizukami, Tsubasa Tamura, Keisuke Aso
Filed: 3 Aug 21
Utility
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16 Jan 24
A vibrating motor includes a stationary portion, and a movable portion able to vibrate with respect to the stationary portion along a center axis extending in a vertical direction.
Atsunori Hirata, Hiroaki Hirano, Ryoichi Mitsuhata
Filed: 10 Dec 21
Utility
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16 Jan 24
A vibration motor includes a stationary portion and a movable portion vibrable in an axis direction with respect to the stationary portion.
Atsunori Hirata, Daisuke Adachi, Hiroaki Hirano, Tomohiro Kobayashi
Filed: 21 Apr 22
Utility
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16 Jan 24
A housing of a drive device includes a tubular portion, a side plate portion, a plate portion, and a peripheral wall portion.
Yuki Ishikawa, Hitoshi Kuroyanagi, Naohiro Wada
Filed: 5 Nov 21
Utility
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9 Jan 24
An optical unit that corrects a shake of an optical module includes: a movable portion having a holder that holds the optical module; and a fixed portion that rotatably supports the movable portion.
Soichiro Kimura, Kazuhiro Sazai, Keishi Otsubo, Tomohiro Egawa, Genki Tanaka
Filed: 29 Sep 21
Utility
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2 Jan 24
A method of position estimation including: a signal detection step in which N (where N is an integer of 3 or more) sensors each detect a magnetic field which is in accordance with a position of a mover and output a detection signal as an electrical signal, the detection signals being displaced in phase by an angle obtained by dividing 360 degrees by N; a crossing detection step in which a crossing detection section sequentially detects a crossing at which each detection signal having been output through the signal detection step crosses another; a subdivision detection step in which a subdivision detection section detects a portion of the detection signal that connects from a crossing to another crossing which is adjacent to that crossing, as one or more subdivision signals; and a line segment joining step in which a line segment joining section sequentially joins the subdivision signals and estimates the position of the mover based on the plural subdivision signals having been joined, to generate an estimated position value signal.
Tomohiro Fukumura, Atsushi Fujita, Shota Ishigami
Filed: 26 Feb 21
Utility
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2 Jan 24
A method of position estimation including: a signal detection step in which N (where N is an integer of 3 or more) sensors each detect a magnetic field which is in accordance with a position of a mover and output a detection signal as an electrical signal, the detection signals being displaced in phase by an angle obtained by dividing 360 degrees by N; a crossing detection step in which a crossing detection section sequentially detects a crossing at which each detection signal having been output through the signal detection step crosses another; a subdivision detection step in which a subdivision detection section detects a portion of the detection signal that connects from a crossing to another crossing which is adjacent to that crossing, as one or more subdivision signals; and a line segment joining step in which a line segment joining section sequentially joins the subdivision signals and estimates the position of the mover based on the plural subdivision signals having been joined, to generate an estimated position value signal.
Tomohiro Fukumura, Atsushi Fujita, Shota Ishigami
Filed: 26 Feb 21
Utility
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2 Jan 24
A motor includes a rotor magnet, a stator, and a magnetic sensor.
Junya Tanaka
Filed: 10 Jan 20
Utility
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2 Jan 24
A rotary electric machine includes a rotor having a hollow shaft, a housing, a current shunter fixed to the housing and in electrical contact with the shaft and the housing, and a nozzle member for feeding a fluid inside the shaft.
Keisuke Nakata, Yuki Ishikawa
Filed: 4 Mar 22
Utility
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2 Jan 24
A drive device includes a motor including a rotor rotatable about a central axis, a transmission connected to the motor, and a housing including a motor housing accommodating the motor and a transmission housing accommodating the transmission.
Kengo Takamura, Hibiki Takada, Shohei Fujimoto
Filed: 28 Dec 21
Utility
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2 Jan 24
A control device includes: an angular velocity detection unit that detects an angular velocity of a motor; a vibration component removal unit that removes a vibration component in a predetermined band from the angular velocity detected by the angular velocity detection unit by filtering; and a current command calculation unit that calculates a current command value of a drive current for driving the motor according to a torque command value and the angular velocity from which the vibration component has been removed by the vibration component removal unit.
Tomonari Mori, Linfeng Lan, Ryo Itaba, Yasuki Kobayashi
Filed: 17 Jan 20
Utility
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2 Jan 24
A first torque estimator determines a first torque estimation value according to a cross product method, and a second torque estimator determines a second torque estimation value according to an energy method.
Tomohiro Fukumura, Linfeng Lan
Filed: 20 Aug 20
Utility
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19 Dec 23
Provided is a capacitor module in which a plurality of film capacitor cells and a pair of bus bars are housed in a metal case to be integrated with a resin added in the metal case, and an electrical insulating film is formed at least on an inner surface of the metal case or each of outer surfaces of the pair of bus bars.
Keiichi Suzuki
Filed: 24 May 22
Utility
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12 Dec 23
A centrifugal fan includes an impeller with a base expanded radially, vanes arranged circumferentially, extending from a radially inner side to a radially outer side, and ends thereof at one axial side being connected to the base, and a ring portion connecting ends of the vanes at the other axial side.
Shingo Yoshino, Naoya Nonomura
Filed: 9 Dec 22
Utility
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12 Dec 23
A cooling unit includes a cold plate extending in a horizontal direction, a tank defining a tank chamber that stores a refrigerant, the tank including an outer tank surface and an inner tank surface, and a pump defining a pump chamber, the pump including an outer pump surface and an inner pump surface.
Toshihiko Tokeshi, Takehito Tamaoka, Nobuya Nakae
Filed: 22 Jun 22
Utility
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12 Dec 23
A motor includes a stator, a rotor, and a bearing.
Hideki Nishimura, Tomohiro Hasegawa, Hiroaki Hirano, Yoichi Sekii
Filed: 1 Jun 21
Utility
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12 Dec 23
A motor adjustment method adjusts a motor driven by a controller.
Sakuya Kishi, Koichi Takae
Filed: 4 Aug 22
Utility
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5 Dec 23
A transmission mechanism device includes a transmission mechanism including a hollow shaft, and a bearing supporting an outer face of the shaft.
Keisuke Nakata, Yuki Ishikawa
Filed: 3 Mar 22
Utility
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28 Nov 23
A transmission mechanism device includes a transmission mechanism including gears, a first shaft, and a first bearing supporting the first shaft, a housing accommodating the transmission mechanism and having a first bearing holder portion on the inner face, oil collected in the lower region of the housing, and a catch tank disposed in the housing and opens upwards.
Keisuke Nakata, Yuki Ishikawa
Filed: 2 Mar 22