4584 patents
Page 5 of 230
Utility
Power conversion device
5 Dec 23
The power conversion device includes a semiconductor module having a connection terminal, a cooler, a control board, a capacitor module, a cover, a case, and a connection busbar.
Yoshifumi Mizuno, Yoshitsugu Hirayama, Hirofumi Inoue
Filed: 20 Dec 21
Utility
Electric motor control device and electric power steering apparatus using the same
5 Dec 23
An electric motor control device, capable of suppressing a torque ripple even when electrical characteristics on a motor have errors or variations, comprises: a fundamental electric-current instruction generator for outputting d-axis and q-axis fundamental electric-current instructions for outputting fundamental torque from the motor having saliency; a position dependency component generator for outputting a position dependency component(s) of the motor according to its rotational position; an electric current correction instruction calculator for calculating d-axis and q-axis current correction instructions from the d-axis and q-axis fundamental electric-current instructions, and the position dependency component(s); an electric current correction instruction superposition unit for generating d-axis and q-axis current instructions by performing superposition of the d-axis and q-axis current correction instructions on the d-axis and q-axis fundamental electric-current instructions; and an electric current controller for controlling a current to flow through the motor by an inverter, based on the d-axis and q-axis current instructions.
Masahiko Orii, Isao Kezobo, Tatsuya Mori, Genki Fujii
Filed: 27 Jun 19
Utility
Rotor, motor, compressor, air conditioner, and manufacturing method of rotor
5 Dec 23
A rotor includes a rotor core having magnet insertion holes in a number corresponding to a pole number, and a center hole.
Takanori Watanabe
Filed: 7 Nov 18
Utility
Master device and communication method
5 Dec 23
A master device according to this disclosure which communicates with a plurality of slave devices to share cyclic data includes: a configuration information acquiring unit to acquire a phase difference of each of the slave devices determined based on a number of other slave devices to be relayed when the each slave device communicates with the master device; and a transmission timing determining unit to calculate a hop count from a number of other slave devices to be relayed when the each slave device communicates with the master device or another slave device based on the phase difference acquired by the configuration information acquiring unit and to determine a transmission timing for each slave device to transmit the cyclic data in such a way that communications with a same hop count are performed at a same timing by the plurality of slave devices.
Yuina Nakashio
Filed: 13 Mar 20
Utility
Infrared imaging device
5 Dec 23
An infrared imaging device comprises an infrared imaging sensor to detect infrared light as heat, a temperature drift compensation amount calculator to calculate a temperature drift compensation amount in accordance with a temperature change of the substrate, with respect to a pixel output outputted from each of the plurality of pixels, a compensation amount calculation function generator to generate a function with the temperature of the substrate as an independent variable; and a timing controller to cause the infrared imaging sensor and the substrate temperature sensor to synchronously output data to the compensation amount calculation function generator for generating the function, wherein the compensation amount calculation function generator uses the data for generation output after the generation of the function as additional data for improving accuracy of the function.
Tomohiro Maegawa, Hiroshi Hirosaki
Filed: 12 Jun 19
Utility
Optical frequency control device, optical oscillation device, frequency conversion device, and radio wave generation device
5 Dec 23
An optical frequency control device includes: a detection circuit to receive first light including a first frequency, receive second light including a second frequency, modulate the first light with a local oscillation signal, and detect a differential beat signal between the frequency of sideband light included in the modulated first light and the second frequency; a light source control circuit to change the second frequency by frequency-dividing the differential beat signal with a first frequency division number, by frequency-dividing a reference signal with a second frequency division number, and by outputting a phase error signal indicating a phase difference between the frequency-divided differential beat signal and the frequency-divided reference signal; and a signal processing unit to set each of the first frequency division number and the second frequency division number according to the set value of a frequency difference between the first frequency and the second frequency.
Junya Nishioka, Tomohiro Akiyama, Yuta Takemoto, Toshiyuki Ando
Filed: 4 Apr 22
Utility
Non-transitory computer readable medium storing data distribution program, server apparatus, terminal apparatus, and data distribution system
5 Dec 23
A data distribution program causes a server apparatus to execute a process of distributing project data to a terminal apparatus that writes the project data to a device among a plurality of devices included in an apparatus.
Toru Ishikuro
Filed: 12 May 21
Utility
Illumination device
5 Dec 23
An illumination device includes a light source unit that emits light, a first optical unit that lets the light enter and changes a divergence angle of the entered light, a second optical unit including an image light formation unit that lets the light with the changed divergence angle enter and emits light including image light having image information, and a drive unit that moves the first optical unit and the second optical unit.
Ritsuya Oshima, Masatoshi Nishimura, Akihiro Yamada, Muneharu Kuwata
Filed: 21 Nov 19
Utility
Information processing device and information processing method for judging the semantic relationship between words and sentences
5 Dec 23
An information processing device includes processing circuitry to acquire object spatiotemporal information including spatiotemporal information indicating coordinates of objects in time and space and a name of each of the objects and to generate morphological analysis-undergone object spatiotemporal information by executing a morphological analysis as a process of analyzing the name of each of the objects included in the object spatiotemporal information into one or more words; to acquire morphological analysis-undergone names of vicinal objects, as objects existing in a vicinity of each of the objects in time and space, from the morphological analysis-undergone object spatiotemporal information; to calculate a distribution of vicinal object name words, as words included in the names of the vicinal objects of each of the objects, from the morphological analysis-undergone names; and to convert the distribution of the vicinal object name words to a spatiotemporal information-considered distributed representation regarding words.
Hideaki Joko, Takahiro Otsuka
Filed: 6 Apr 21
Utility
Multi-wire electric discharge machine
28 Nov 23
A multi-wire electric discharge machine includes: a plurality of cutting wire sections arranged in parallel in such a way as to face a workpiece, a wire electrode being wound around guide rollers to form the cutting wire sections; a drive unit that adjusts relative distances between the workpiece and the cutting wire sections; a machining power supply that applies pulse voltages between the workpiece and the cutting wire sections; a machining-state detection device that detects machining states in the cutting wire sections; and a machining control device that controls the drive unit and the machining power supply, in which when values indicating the machining states exceed a threshold value, the machining control device outputs, to the machining power supply, commands to apply the pulse voltages according to a machining condition for avoiding breakage of the wire electrode.
Atsushi Itokazu
Filed: 12 Apr 21
Utility
Machine tool machining dimensions prediction device, machine tool equipment abnormality determination device, machine tool machining dimensions prediction system, and machine tool machining dimensions prediction method
28 Nov 23
A machine tool machining dimensions prediction device (100) includes: a data collector (10) to acquire driving state information of a machine tool; a feature amount extractor (211) to extract a feature amount from the driving state information; a data analyzer (311) to analyze the extracted feature amount; and a machining quality prediction model generator (312) to generate, from the analyzed information, a prediction model of a machining dimension of a workpiece.
Noriyasu Fukatsu, Tetsushi Ishida, Kiyofumi Takeuchi, Osamu Nasu, Yoshiyuki Hattori, Mariko Nishino
Filed: 15 Jun 18
Utility
Moving handrail and method of manufacturing moving handrail
28 Nov 23
Provided is a moving handrail that can lengthen its lifetime.
Ryuma Nakamura, Yoshitomo Nishimura, Hidetoshi Takeyama, Masashi Hara, Samito Nozue
Filed: 4 Mar 20
Utility
Heat exchanger and method of manufacturing thereof, and refrigeration cycle apparatus
28 Nov 23
There are provided a heat exchanger having a flat tube and a fin bonded together, without causing melting of a coating material covering the fin, and a method of manufacturing thereof.
Daisuke Ito
Filed: 30 Sep 22
Utility
Motor control device and belt tension state detection device
28 Nov 23
A motor control device is capable of detecting, through use of a small-sized or simple device, a state of belt tension in a belt transmitting torque of an electric motor in a motor system.
Hiroyuki Sekiguchi, Naoto Takano
Filed: 9 Oct 19
Utility
Air-conditioning apparatus
28 Nov 23
The indoor unit has an air passage formed therein to allow the indoor air drawn in the indoor unit to pass therethrough.
Shinichi Ito, Masaki Toyoshima
Filed: 24 Apr 19
Utility
Angle detection apparatus
28 Nov 23
Even using the redundant system resolver in which the magnetic interference between systems occurs, to provide an angle detection apparatus which can reduces the influence of the magnetic interference and can calculate the rotational angle with good accuracy, without performing synchronous control between systems in real time.
Tatsuya Mori, Toshihiro Matsunaga, Hiroko Ikeda, Seiji Sawada, Kenta Kubo, Kenji Ikeda
Filed: 25 Jan 19
Utility
Electrical characteristic inspection device for semiconductor device and electrical characteristic inspection method for semiconductor device
28 Nov 23
An object is to provide a technique capable of creating a precise measurement condition in a facilitated manner relating to an electrical characteristic inspection for a semiconductor device.
Sumito Ogata, Yasushi Hisaoka, Takaya Noguchi
Filed: 12 Oct 21
Utility
Motor driving device and refrigeration cycle apparatus
28 Nov 23
A motor driving device that drives a motor and is capable of switching a connection state of stator windings of the motor, includes: relays to switch the connection state of the stator windings by switching positions of contact plates; and a contact control unit to control each of the positions of the contact plates by outputting, to the relays, signals for actuating the contact plates.
Keiichiro Shizu, Masaki Muramatsu
Filed: 25 Feb 19
Utility
Illumination device
28 Nov 23
An illumination device that simulates the sky, includes a light source that emits first light; a light-emitting part that allows the first light to enter, guides the entered first light by means of total reflection while scattering the first light, and emits the scattered light from a light emission surface; a back surface reflective part that is provided to face a back surface as a surface of the light-emitting part on a side opposite to the light emission surface and reflects light emitted from the back surface of the light-emitting part; a frame that includes a part situated at least in front of the light emission surface of the light-emitting part; and an optical member that is provided between the light emission surface of the light-emitting part and the part of the frame and reflects a part of the light emitted from the light emission surface of the light-emitting part.
Haruka Yamazaki, Satoru Okagaki, Yusuke Fujii
Filed: 27 Aug 19
Utility
Rotating electric machine and rotor therefor
28 Nov 23
In a rotor for a rotating electric machine, a key portion, a first stress relaxation groove, a second stress relaxation groove, and a protruding portion are provided at an inner periphery of a rotor core.
Takaaki Nagashima
Filed: 18 Mar 22