Hitachi, Ltd.

Hitachi Astemo Ltd.

Canon Kabushiki Kaisha

Hitachi Car Engineering Co., Ltd.

Alaxala Networks Corporation

Kenichi Yoshida

Hitoshi Yokota

Takashi Maruyama

Kentaro Matsuo

Toshiaki Hirata

Osamu Takada

Hiroshi Ito

Hiroaki Hasegawa

Hironori Oikawa

Hirokazu Kameda

Chisei Sumita

Gou Sasaki

Daiki Kadomatsu

Ken Hoshino

Takeshi Nakamura

Noriya Nakao

Kazuma Kishi

Mikihiro Tanaka

Hiroyuki Inokuchi

Kosei Tanaka

Takao Watanabe

Atsushi Shimizu

Norifumi Nishikawa

Toshiyuki Innami

Takeshi Ishizaki

Hiroshi Tsuji

Kazuo Tahara

Toshiyuki Ajima

Kiminori Sugauchi

Makoto Kayashima

Shigeru Miyake

Shinichi Fujino

Fumio Noda

Hisaya Shimizu

Takashi Nishikado

Akihiro Urano

Kohei Myoen

Shun Taniguchi

Yoshinori Watanabe

Kenichi Kihara

Kazuhiro Kusama

Masatoshi Takihiro

Masato Terada

Kenji Kashiwagi

Tohru Setoyama

Yasuhide Mori

Masaaki Oya

Masataka Ota

Hiroshi Motoda

Keisuke Nishidate

Kazuko Hamaguchi

Takashi Kiguchi

Yusuke Shomura

Atsushi Mitomi

Kenya Nishiki

Fumikazu Takahashi

Katsuo Nakashima

Takashi Nisikado

Kanako Shoji

Takafumi Hosokawa

Daisuke Tobimatsu

Kazuyoshi Aizawa

Provided are an electric motor control device and an electric motor control method with high reliability capable of performing noise reduction control (or sensorless control) by superimposing a radio-frequency voltage and capable of performing compensation of a dead time of an inverter with a minimum necessary configuration. The electric motor control device includes: a radio-frequency voltage superimposing unit that adds a radio-frequency voltage command value to a fundamental wave voltage command value and outputs a voltage command value; a radio-frequency current estimation value calculation unit that estimates a radio-frequency current value from the radio-frequency voltage command value; a dead time compensation current estimation value calculation unit that adds a radio-frequency current estimation value estimated by the radio-frequency current estimation value calculation unit to a fundamental wave current command value; and a dead time compensation voltage calculation unit that compensates an output voltage of an inverter according to a dead time compensation current estimation value calculated by the dead time compensation current estimation value calculation unit.

Electric motor control device, vehicle, and electric motor control method

A power conversion device includes: an inverter that converts a DC voltage into an AC voltage and drives a synchronous motor; and a magnetic pole position correction unit that corrects an error in a magnetic pole position of a rotor from a rotation angle sensor of the synchronous motor. The magnetic pole position correction unit includes an actual current phase calculation unit that calculates a current phase from a current when three-phase lines are short-circuited during rotation of the synchronous motor and an ideal current phase calculation unit that calculates an ideal current phase based on a rotational speed of the rotor and a temperature of a stator, and corrects the magnetic pole position from a difference between outputs of the actual current phase calculation unit and the ideal current phase calculation unit.

Power conversion device

A nail printing apparatus includes a print head to perform a printing operation in which an image on a nail of a person to be printed is printed by moving in a scanning direction and ejecting ink from a nozzle, and a control unit to control movement of the print head. In a case where movement of the print head is stopped regardless of controlling of movement of the print head associated with the printing operation, the control unit switches the controlling of movement of the print head after the stopping based on a stop position of the print head.

Nail printing apparatus and control method

Provided is a power conversion device that does not require adaptation work and can suppress a current beat regardless of an operation state of a motor. The power conversion device includes an inverterthat converts a DC voltage into an AC voltage and drives an AC motor, and beat compensation unitsandthat suppress a current beat component of an output current of the inverter. The beat compensation unitsandinclude beat extraction units, andthat calculate beat components of the output current of the inverter, and beat compensation voltage calculation unitsandthat estimate beat compensation voltages from the beat components calculated by the beat extraction units, and. The current beat component of the output current of the inverteris suppressed based on the beat compensation voltages estimated by the beat compensation voltage calculation unitsand

Power conversion device and motor vehicle system including the same

An object of one embodiment of the present disclosure is to provide a product with a high added value to a user by preventing an unnatural character string from being combined, combination of no character string, and the like in a case where there is no voice or almost no voice before or after an image selected from within a moving image. One embodiment of the present disclosure is an image processing apparatus including: a selection unit configured to select, from a moving image including a plurality of frames, a part of the moving image; an extraction unit configured to extract a voice during a predetermined time corresponding to the selected part in the moving image; and a combination unit configured to combine a character string based on a voice extracted by the extraction unit, with the part of the moving image selected by the selection unit.

Image processing apparatus, image processing method and medium

A motor drive device includes a power conversion circuit that drives an AC motor and a controller that controls the power conversion circuit. The controller includes a command current calculation unit generating a command current according to command torque for the AC motor and a current control unit that performs feedback control for adjusting a current applied to the AC motor to the command current. The controller also includes a control gain setting unit that calculates a control gain used for the feedback control based on the command torque and sets the calculated control gain in the current control unit. The control gain setting unit performs control such that a time from a decrease of an absolute value of the command torque to switching of the control gain is longer than a time from an increase of the absolute value of the command torque to switching of the control gain.

Motor drive device and electric vehicle system

An object of one embodiment of the present disclosure is to provide a product with a high added value to a user by preventing an erroneous character string from being combined in a case where a voice before and after an image selected from within a moving image is a mixed voice. One embodiment of the present disclosure is an image processing apparatus including: a selection unit configured to select, from a moving image including a plurality of frames, a part of the moving image; an extraction unit configured to extract a voice during a predetermined time corresponding to the selected part in the moving image; and a combination unit configured to combine a character string based on a voice extracted by the extraction unit, with the part of the moving image selected by the selection unit or a frame among frames corresponding to the part.

A traffic analysis apparatus includes: a packet transmitter/receiver; a packet aggregating unit, for adding the number of packets that employ the same values for items in a combination that includes one arbitrary item or multiple items in packets obtained by the packet transmitter/receiver; a variety aggregating unit, for adding the number of appearances of different values in the items that are not included in the combination; and a packet estimation unit for, when the total number of packets is greater than a designated threshold value, employing a relationship between the values of the items of the combination formed of one arbitrary item or multiple items, the number of appearances of different values and the threshold value, and estimating the characteristics of the packets for which the number has exceeded the threshold value.

Traffic analysis apparatus and analysis method

An integrated database system comprises a plurality of database systems connected to one another through a network, each of the plurality of database systems managing its own stored data independently of the other database systems and accessing the stored data in accordance with an access request, and an integrated database unit connected to the network. The integrated database unit includes a directory database which stores a correspondence between each of the data stored in the plurality of database systems and a database system in which each of the data is stored, a directory control unit which acquires, by using the directory database, directory information corresponding to target data of the accepted access request, a database identifying unit which identifies a database system, and a database control unit which issues, on the basis of the acquired directory information, an access request to the database system having the target data of the accepted access request. The database system includes a database server unit which accesses a database in accordance with the access request issued by the integrated database unit.

Integrated database system and method for accessing a plurality of databases

In an environment in which programs are executed on a plurality of computers connected to a network, a program distribution managing system facilitates, when a reference relationship exists between programs on mutually different execution computers, management for distribution and deletion of applications. The system includes a distribution information supplier to supply information indicating a status of distribution of a program to be executed on either one of the computers, a reference information supplier to supply information concerning a type of the execution program as a reference destination of the program, and a reference destination managing section to acquire a location to which the execution program as a reference destination of the execution program is distributed according to information from the distribution information supplier and information from the reference information supplier.

System for managing distribution of programs

The degree of users' satisfaction concerning the utilization of services and the utilization efficiency of resources used for the services are optimized. The service reservation management computers deny based on the degree of importance as a standard, which increases in proportion to a level of a load of resources utilized for the service supplied by a high function network, a reservation booking request which has a degree of importance not higher than the standard, and which was received from an end user's computer via a service supply management computer, even when an amount of resources used for the service in a case where the reservation is accepted with the service then executed in accordance with the reservation booking request does not exceed an amount of resources utilizable for the service.

Service reservation system

A vehicle electric drive system and a hybrid engine-motor type vehicle drive system realizing simplification and miniaturization of electric parts and, moreover, reduction in cost while maintaining performances can be provided. A partof wheels is driven by an engine. The wheels are driven by a motor as necessary. The motor, a generator, and an accessory battery are connected to each other via a voltage step-up/step-down device. The voltage step-up/step-down device has a function of stepping up power of the battery and supplying the stepping up power to the motor, and a function of stepped down power of the generator and supplying the stepped down power to the battery and the accessories.

Electric drive device for vehicle and hybrid engine/motor-type four wheel drive device

A communication system is provided of selecting the most approximate line from two or more connectable lines and connecting with a provider through the selected line in the mobile communication environment. The mobile device and the public phone of each phone company provide a standard wireless data communication facility, respectively. The public line pre-stores information about dial-up numbers of access points and a transmission speed of an internet provider. When the user starts the communication, the mobile device operates to obtain the most approximate access point information from each of the public phones and then dial up the most approximate access point through the public phone/line well-specified to the user.

Communication system

In communication between communication terminals utilizing a network, a communication apparatus that receives and interprets service contents information described by a tag-type language or the like and performs processing in accordance with the interpretation thereof is disposed between the communication terminals. The communication apparatus can combine a plurality of processing operations in accordance with the described contents of the information to be implemented and can make various service designs. Further, the communication apparatus is characterized to acquire a program for updating a processing method definition connecting the service contents information and the processing operations by means of the Internet so that the processing method definition of the apparatuses distributed dispersedly can be modified promptly and the whole system can cope with modification of service contents promptly.

Apparatus and system for communication

A wireless LAN system is provided to make a frequency band setup task easy such that interference among base stations is reduced. The base station connected to a wired LAN includes a wired connection unit connected to the wired LAN and a wireless communication unit communicating with a LAN terminal via radio waves. The base station finds frequency bands already used by other devices in a place where the base station is installed and sets up a frequency band not used by the other devices as a frequency band to be used by the wireless communication unit to automatically set up a frequency band of radio waves to be used by the wireless communication unit.

Base station for wireless communication and method for setting up frequency band in the base station

Growing community of inventors

Kitamoto, Japan

Kenichi Yoshida