Patents by Inventor Katsuji Mitsui
Katsuji Mitsui 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).
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Patent number: 10230306Abstract: A power conversion device, which includes an insulation type full bridge converter and can switch a power transmission direction at a high speed, is provided. A DC/DC converter (10) constitutes a power conversion device, which operates as a first type converter that converts a voltage within a first range applied to a first input/output terminal pair into a voltage within a second range and outputs the voltage from a second input/output terminal pair or a second type converter that converts a voltage within the second range applied to the second input/output terminal pair into a voltage within the first range and outputs the voltage from the first input/output terminal pair, as a device that performs a specific state transition of the DC/DC converter (10) after a change rate of a magnitude of a current flowing through a winding of a primary or secondary side of a transformer (TR) with respect to time reaches a value within a predetermined change rate range.Type: GrantFiled: May 2, 2017Date of Patent: March 12, 2019Assignee: OMRON CorporationInventors: Masayuki Suetomi, Katsuji Mitsui, Isao Fujihata, Kesanobu Kuwabara, Yoshihiko Yamaguchi, Makoto Ohashi
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Patent number: 9847723Abstract: A power conversion device, which includes an insulation type full bridge converter and can switch a power transmission direction at a high speed, is provided. A DC/DC converter (10) constitutes a power conversion device, which operates as a first type converter that converts a voltage within a first range applied to a first input/output terminal pair into a voltage within a second range and outputs the voltage from a second input/output terminal pair or a second type converter that converts a voltage within the second range applied to the second input/output terminal pair into a voltage within the first range and outputs the voltage from the first input/output terminal pair, as a device that performs a predetermined state transition of the DC/DC converter (10) after waiting for a load current value of a primary or secondary side of a transformer (TR) becomes a value within a predetermined current value range.Type: GrantFiled: May 2, 2017Date of Patent: December 19, 2017Assignee: OMRON CorporationInventors: Masayuki Suetomi, Katsuji Mitsui, Isao Fujihata, Kesanobu Kuwabara, Yoshihiko Yamaguchi, Makoto Ohashi
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Patent number: 9837908Abstract: A power conversion device, which includes an insulation type full bridge converter and can switch a power transmission direction at a high speed, is provided. A DC/DC converter (10) constitutes a power conversion device, which operates as a first type converter that converts a voltage within a first range applied to a first input/output terminal pair into a voltage within a second range and outputs the voltage from a second input/output terminal pair or a second type converter that converts a voltage within the second range applied to the second input/output terminal pair into a voltage within the first range and outputs the voltage from the first input/output terminal pair, as a device that performs predetermined state transition of the DC/DC converter (10) after waiting for a load current value of a secondary side of a transformer (TR) to be a value within a predetermined current value range.Type: GrantFiled: May 2, 2017Date of Patent: December 5, 2017Assignee: OMRON CorporationInventors: Masayuki Suetomi, Katsuji Mitsui, Isao Fujihata, Kesanobu Kuwabara, Yoshihiko Yamaguchi, Makoto Ohashi
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Publication number: 20170324337Abstract: A power conversion device, which includes an insulation type full bridge converter and can switch a power transmission direction at a high speed, is provided. A DC/DC converter (10) constitutes a power conversion device, which operates as a first type converter that converts a voltage within a first range applied to a first input/output terminal pair into a voltage within a second range and outputs the voltage from a second input/output terminal pair or a second type converter that converts a voltage within the second range applied to the second input/output terminal pair into a voltage within the first range and outputs the voltage from the first input/output terminal pair, as a device that performs predetermined state transition of the DC/DC converter (10) after waiting for a load current value of a secondary side of a transformer (TR) to be a value within a predetermined current value range.Type: ApplicationFiled: May 2, 2017Publication date: November 9, 2017Applicant: OMRON CorporationInventors: Masayuki SUETOMI, Katsuji MITSUI, Isao FUJIHATA, Kesanobu KUWABARA, Yoshihiko YAMAGUCHI, Makoto OHASHI
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Publication number: 20170324336Abstract: A power conversion device, which includes an insulation type full bridge converter and can switch a power transmission direction at a high speed, is provided. A DC/DC converter (10) constitutes a power conversion device, which operates as a first type converter that converts a voltage within a first range applied to a first input/output terminal pair into a voltage within a second range and outputs the voltage from a second input/output terminal pair or a second type converter that converts a voltage within the second range applied to the second input/output terminal pair into a voltage within the first range and outputs the voltage from the first input/output terminal pair, as a device that performs a specific state transition of the DC/DC converter (10) after a change rate of a magnitude of a current flowing through a winding of a primary or secondary side of a transformer (TR) with respect to time reaches a value within a predetermined change rate range.Type: ApplicationFiled: May 2, 2017Publication date: November 9, 2017Applicant: OMRON CorporationInventors: Masayuki SUETOMI, Katsuji MITSUI, Isao FUJIHATA, Kesanobu KUWABARA, Yoshihiko YAMAGUCHI, Makoto OHASHI
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Publication number: 20170324335Abstract: A power conversion device, which includes an insulation type full bridge converter and can switch a power transmission direction at a high speed, is provided. A DC/DC converter (10) constitutes a power conversion device, which operates as a first type converter that converts a voltage within a first range applied to a first input/output terminal pair into a voltage within a second range and outputs the voltage from a second input/output terminal pair or a second type converter that converts a voltage within the second range applied to the second input/output terminal pair into a voltage within the first range and outputs the voltage from the first input/output terminal pair, as a device that performs a predetermined state transition of the DC/DC converter (10) after waiting for a load current value of a primary or secondary side of a transformer (TR) becomes a value within a predetermined current value range.Type: ApplicationFiled: May 2, 2017Publication date: November 9, 2017Applicant: OMRON CorporationInventors: Masayuki SUETOMI, Katsuji MITSUI, Isao FUJIHATA, Kesanobu KUWABARA, Yoshihiko YAMAGUCHI, Makoto OHASHI
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Patent number: 7622898Abstract: A charging apparatus for electrically charging a capacitor storage type power source comprises a switching circuit for turning on/off the charge current, a current detection circuit for detecting the charge current, a voltage detection circuit for detecting the voltage of power source, a constant current control circuit for outputting an error amplifying signal according to the current value, a power control circuit for outputting an error amplifying signal according to the current value, the voltage value-and a power reference value, a constant voltage control circuit for outputting an error amplifying signal according to the voltage value and a voltage reference value, an OR circuit for selecting one of the error amplifying signals and a control circuit for generating a pulse width modulation signal according to the error amplifying signal output from the OR circuit to turn on/off the switching circuit and control the charge current.Type: GrantFiled: February 16, 2007Date of Patent: November 24, 2009Assignee: Power Systems Co., Ltd.Inventors: Masaaki Shimizu, Katsuji Mitsui, Masahiko Shimizu, Shinichi Yamamoto, Atsushi Shimizu, Masahiko Shinotsuka, Masaaki Yamagishi, Hiroshi Tsuji
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Publication number: 20070194759Abstract: A charging apparatus for electrically charging a capacitor storage type power source comprises a switching circuit for turning on/off the charge current, a current detection circuit for detecting the charge current, a voltage detection circuit for detecting the voltage of power source, a constant current control circuit for outputting an error amplifying signal according to the current value, a power control circuit for outputting an error amplifying signal according to the current value, the voltage value-and a power reference value, a constant voltage control circuit for outputting an error amplifying signal according to the voltage value and a voltage reference value, an OR circuit for selecting one of the error amplifying signals and a control circuit for generating a pulse width modulation signal according to the error amplifying signal output from the OR circuit to turn on/off the switching circuit and control the charge current.Type: ApplicationFiled: February 16, 2007Publication date: August 23, 2007Applicant: Power Systems Co., Ltd.Inventors: Masaaki Shimizu, Katsuji Mitsui, Masahiko Shimizu, Shinichi Yamamoto, Atsushi Shimizu, Masahiko Shinotsuka, Masaaki Yamagishi, Hiroshi Tsuji