Patents by Inventor Keisuke Hattori
Keisuke Hattori 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: 11133671Abstract: According to an embodiment of the invention, a control device is provided and controls a power converter that can be connected to a terminal of a direct current power transmission system transmitting power according to a current command value that is set. The control device includes a first characteristic setter having a first characteristic preset. When the power converter is set at a power transmission end of the direct current power transmission system, the first characteristic outputs an output terminal voltage for the power converter. The output terminal voltage corresponds to a current of a current control based on a current command value set at a power receiving end of the direct current power transmission system. The output terminal voltage of the first characteristic monotonously decreasing with respect to the current of the current control.Type: GrantFiled: May 31, 2018Date of Patent: September 28, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keisuke Hattori, Tomohisa Okami
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Publication number: 20210167596Abstract: According to an embodiment of the invention, a control device is provided and controls a power converter that can be connected to a terminal of a direct current power transmission system transmitting power according to a current command value that is set. The control device includes a first characteristic setter having a first characteristic preset. When the power converter is set at a power transmission end of the direct current power transmission system, the first characteristic outputs an output terminal voltage for the power converter. The output terminal voltage corresponds to a current of a current control based on a current command value set at a power receiving end of the direct current power transmission system. The output terminal voltage of the first characteristic monotonously decreasing with respect to the current of the current control.Type: ApplicationFiled: May 31, 2018Publication date: June 3, 2021Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keisuke HATTORI, Tomohisa OKAMI
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Patent number: 10958476Abstract: According to an embodiment of the invention, a data transmission device that includes a communicator and a controller is provided. The communicator is connected to a network and communicates with another device via the network. The controller transmits, from the communicator to the other device, a data set including data of at least one item in the case where the data of the at least one item has changed from the state of previous interval; and the transmitted data set includes the data having the changed state. The controller acquires the data of the at least one item at a first interval, and performs the transmitting of the data set to the other device at a second interval or at a frequency less than the second interval by updating the data of the at least one item at the second interval; and the second interval is slower than the first interval.Type: GrantFiled: August 23, 2016Date of Patent: March 23, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keisuke Hattori, Tomohisa Ohkami
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Patent number: 10938297Abstract: An AC-DC conversion device that includes a major circuit portion and a control circuit. The major circuit portion includes a converter in which multiple switch portions in a bridge connection include separately-excited switching elements and snubber circuits connected in parallel with the switching elements; and the major circuit portion is connected to an alternating current power supply and a direct current circuit and applies, to the direct current circuit, an alternating current voltage applied from the alternating current power supply by an ON of the multiple switch portions. The control circuit controls the voltage applied to the direct current circuit by controlling the ON timing of the multiple switch portions by inputting a control pulse to each of the multiple switch portions.Type: GrantFiled: May 22, 2019Date of Patent: March 2, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keisuke Hattori, Teruo Yoshino, Tomohisa Okami
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Publication number: 20200252238Abstract: According to an embodiment of the invention, a data transmission device that includes a communicator and a controller is provided. The communicator is connected to a network and communicates with another device via the network. The controller transmits, from the communicator to the other device, a data set including data of at least one item in the case where the data of the at least one item has changed from the state of previous interval; and the transmitted data set includes the data having the changed state. The controller acquires the data of the at least one item at a first interval, and performs the transmitting of the data set to the other device at a second interval or at a frequency less than the second interval by updating the data of the at least one item at the second interval; and the second interval is slower than the first interval.Type: ApplicationFiled: August 23, 2016Publication date: August 6, 2020Inventors: Keisuke HATTORI, Tomonhisa OHKAMI
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Publication number: 20190273430Abstract: An AC-DC conversion device that includes a major circuit portion and a control circuit. The major circuit portion includes a converter in which multiple switch portions in a bridge connection include separately-excited switching elements and snubber circuits connected in parallel with the switching elements; and the major circuit portion is connected to an alternating current power supply and a direct current circuit and applies, to the direct current circuit, an alternating current voltage applied from the alternating current power supply by an ON of the multiple switch portions. The control circuit controls the voltage applied to the direct current circuit by controlling the ON timing of the multiple switch portions by inputting a control pulse to each of the multiple switch portions.Type: ApplicationFiled: May 22, 2019Publication date: September 5, 2019Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keisuke HATTORI, Teruo Yoshino, Tomohisa Okami
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Patent number: 10404157Abstract: An AC-DC conversion device that includes a major circuit portion and a control circuit is provided. The major circuit portion includes a converter in which multiple switch portions in a bridge connection include separately-excited switching elements and snubber circuits connected in parallel with the switching elements; and the major circuit portion is connected to an alternating current power supply and a direct current circuit and applies, to the direct current circuit, an alternating current voltage applied from the alternating current power supply by an ON of the multiple switch portions. The control circuit controls the voltage applied to the direct current circuit by controlling the ON timing of the multiple switch portions by inputting a control pulse to each of the multiple switch portions.Type: GrantFiled: January 7, 2016Date of Patent: September 3, 2019Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keisuke Hattori, Teruo Yoshino, Tomohisa Okami
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Publication number: 20180351449Abstract: An AC-DC conversion device that includes a major circuit portion and a control circuit is provided. The major circuit portion includes a converter in which multiple switch portions in a bridge connection include separately-excited switching elements and snubber circuits connected in parallel with the switching elements; and the major circuit portion is connected to an alternating current power supply and a direct current circuit and applies, to the direct current circuit, an alternating current voltage applied from the alternating current power supply by an ON of the multiple switch portions. The control circuit controls the voltage applied to the direct current circuit by controlling the ON timing of the multiple switch portions by inputting a control pulse to each of the multiple switch portions.Type: ApplicationFiled: January 7, 2016Publication date: December 6, 2018Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keisuke HATTORI, Teruo YOSHINO, Tomohisa OKAMI
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Patent number: 4247951Abstract: A radio which has assigned frequencies or channels for operation is prevented from operating on other channels. The frequency synthesizer in the radio is a large scale integrated circuit in a single semiconductor chip which is controlled by input codes from channel select switches. The synthesizer includes circuitry which responds to input codes for illegal channels and produces an inhibit signal thereby preventing generation of unauthorized frequencies. The circuitry may include a read only memory which is addressed by the input code. Alternatively, logic circuitry may be provided which responds to codes for illegal channels. Due to the circuitry being in integrated form, the method of inhibiting unauthorized signal generation cannot be easily circumvented.Type: GrantFiled: October 31, 1978Date of Patent: January 27, 1981Assignee: Micro Power Systems, Inc.Inventors: Keisuke Hattori, Alexander R. Sabo