Patents by Inventor Kunihiro Kawahara

Kunihiro Kawahara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11799405
    Abstract: In sensorless control for a rotary machine, when variations in inductances for U, V, W phases due to manufacturing error are great, imbalance occurs among detected currents for the respective phases. Thus, estimation error of a magnetic pole position of a rotor increases, so that positioning accuracy is reduced. Correction filters for imparting gains in accordance with rotary machine constants for the respective phases are provided to control means or magnetic pole position calculation means, thereby correcting the imbalance occurring among the detected currents for the respective phases.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: October 24, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yosuke Hachiya, Masato Ito, Akihiro Maruyama, Kunihiro Kawahara
  • Publication number: 20220173678
    Abstract: In sensorless control for a rotary machine, when variations in inductances for U, V, W phases due to manufacturing error are great, imbalance occurs among detected currents for the respective phases. Thus, estimation error of a magnetic pole position of a rotor increases, so that positioning accuracy is reduced. Correction filters for imparting gains in accordance with rotary machine constants for the respective phases are provided to control means or magnetic pole position calculation means, thereby correcting the imbalance occurring among the detected currents for the respective phases.
    Type: Application
    Filed: April 23, 2019
    Publication date: June 2, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yosuke HACHIYA, Masato ITO, Akihiro MARUYAMA, Kunihiro KAWAHARA
  • Patent number: 10348230
    Abstract: A control device for an AC rotary machine includes a magnetic-pole-position correction amount calculation device that calculates a magnetic-pole-position correction amount based on a detection-current vector detected when a voltage application device applies a voltage to the AC rotary machine according to a voltage command and on the voltage command, and stores in a storage device the magnetic-pole-position correction amount as it is associated with the detection-current vector. At normal operation of the AC rotary machine, a voltage-vector command generation device generates a voltage command for normal operation based on the detection-current vector detected by a current vector detection device and the magnetic-pole-position correction amount associated with the detection-current vector.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: July 9, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yosuke Hachiya, Kunihiro Kawahara
  • Patent number: 7569402
    Abstract: A chip data providing system is provided. The chip data providing system is equipped with an inspection device for inspecting each chip after processing steps of forming integrated circuits on a plurality chips included in a semiconductor wafer are completed, an inspection server that generates, based on an inspection result, first chip data including information concerning the inspection result of each of the chips, and a chip data providing server that generates, based on the first chip data generated by the inspection server and information concerning an assembly enterprise stored in advance, second chip data in a format suitable for a system of the assembly enterprise that selects and uses the plurality of chips included in the semiconductor wafer, and provides the second chip data to the assembly enterprise.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: August 4, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Kunihiro Kawahara, Kazuya Saito
  • Patent number: 7123979
    Abstract: A method of intercorporate information-sharing between a product-manufacturing company and a product-inspecting company includes transmitting product quality and manufacturing number information from a product-manufacturing company's database storage device to a product-inspecting company's database storage device, inspecting a product, manufactured by the product-manufacturing company, by the product-inspecting company and storing an inspected result information of the product in the product-inspecting company's database storage device and transmitting the inspected result information from the product-inspecting company's database storage device to the product-manufacturing company's database storage device.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: October 17, 2006
    Assignee: Seiko Epson Corporation
    Inventor: Kunihiro Kawahara
  • Publication number: 20060010045
    Abstract: A semiconductor-device order-entry/placement management support system is installed in an affiliated company, and includes: an order-entry/placement management server for receiving an ordering information: process control servers which are installed in subcontract companies A-C, and transmits an invoice information that is prepared based on the manufacturing results in the entrusted manufacturing process; and an order-entry/placement management support server, which is installed in the semiconductor maker, transmits an ordering information to the order-entry/placement management server, and transfers the invoice information received from the process control server to the order-entry/placement management server, and at the same time automatically prepares a document used for controlling the manufacturing of the semiconductor device, based on the ordering information and the invoice information.
    Type: Application
    Filed: May 18, 2005
    Publication date: January 12, 2006
    Inventors: Kazuya Saito, Kunihiro Kawahara
  • Publication number: 20050288815
    Abstract: A semiconductor device manufacturing information service system comprises: step control servers, etc. that collect and store manufacturing data indicating the manufacturing result and/or quality in the manufacturing steps accepted by consignee companies X to Z; a manufacturing information service server, in a manufacturing information service company W, that generates customer company basis manufacturing data used in a customer company A by receiving the manufacturing data from the step control servers and changing the data form using a pre-recorded conversion table; and a production and sales control server, in the customer company A, that receives the customer company basis manufacturing data from the manufacturing information service server and displays or prints such data.
    Type: Application
    Filed: May 18, 2005
    Publication date: December 29, 2005
    Inventors: Kunihiro Kawahara, Kazuya Saito
  • Publication number: 20050148103
    Abstract: A chip data providing system is provided. The chip data providing system is equipped with an inspection device for inspecting each chip after processing steps of forming integrated circuits on a plurality chips included in a semiconductor wafer are completed, an inspection server that generates, based on an inspection result, first chip data including information concerning the inspection result of each of the chips, and a chip data providing server that generates, based on the first chip data generated by the inspection server and information concerning an assembly enterprise stored in advance, second chip data in a format suitable for a system of the assembly enterprise that selects and uses the plurality of chips included in the semiconductor wafer, and provides the second chip data to the assembly enterprise.
    Type: Application
    Filed: October 20, 2004
    Publication date: July 7, 2005
    Inventors: Kunihiro Kawahara, Kazuya Saito
  • Publication number: 20040122698
    Abstract: A method of intercorporate information-sharing between a product-manufacturing company and a product-inspecting company includes transmitting product quality and manufacturing number information from a product-manufacturing company's database storage device to a product-inspecting company's database storage device, inspecting a product, manufactured by the product-manufacturing company, by the product-inspecting company and storing an inspected result information of the product in the product-inspecting company's database storage device and transmitting the inspected result information from the product-inspecting company's database storage device to the product-manufacturing company's database storage device.
    Type: Application
    Filed: October 21, 2003
    Publication date: June 24, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Kunihiro Kawahara