Patents by Inventor Toshiaki Takeoka
Toshiaki Takeoka 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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Publication number: 20220221496Abstract: A data collection system includes: a monitoring device that sequentially instructs two or more in-vehicle devices installed in a railroad car to start operating and to stop operating; and an auxiliary power supply that sequentially measures an output voltage and an output current while the in-vehicle devices operate in turns in accordance with an instruction from the monitoring device, and records measurement results.Type: ApplicationFiled: August 8, 2019Publication date: July 14, 2022Applicant: Mitsubishi Electric CorporationInventors: Tomohisa MARUYAMA, Toshiaki TAKEOKA
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Patent number: 11296513Abstract: A station building power supply includes: a power converter that converts DC power to AC power; a casing that houses the power converter; an AC system circuit that supplies the AC power output from the power converter to electrical apparatus outside the casing; and a filter circuit that applies a high-frequency current generated in the power converter from the AC system circuit to the casing. In the station building power supply, the power converter and the casing are grounded.Type: GrantFiled: July 21, 2017Date of Patent: April 5, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshiaki Takeoka, Shinichi Matsumoto, Shuji Ishikura
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Publication number: 20210091570Abstract: A station building power supply includes: a power converter that converts DC power to AC power; a casing that houses the power converter; an AC system circuit that supplies the AC power output from the power converter to electrical apparatus outside the casing; and a filter circuit that applies a high-frequency current generated in the power converter from the AC system circuit to the casing. In the station building power supply, the power converter and the casing are grounded.Type: ApplicationFiled: July 21, 2017Publication date: March 25, 2021Applicant: Mitsubishi Electric CorporationInventors: Toshiaki TAKEOKA, Shinichi MATSUMOTO, Shuji ISHIKURA
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Patent number: 10889206Abstract: A station building power supply device includes a circuit breaker to disconnect a connection with a train side, a circuit breaker to disconnect a connection with the station load side, a power converter disposed between the circuit breaker and the circuit breaker to convert the regenerative power into the AC power, a housing that houses the circuit breaker, the power converter, and the circuit breaker, a voltage sensor that detects a charged state of the housing, and a control unit that controls operations of the circuit breaker, of the power converter, and of the circuit breaker based on a detection result from the voltage sensor.Type: GrantFiled: July 4, 2016Date of Patent: January 12, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshiaki Takeoka, Shinichi Matsumoto
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Patent number: 10730405Abstract: A station building auxiliary power unit includes a start-of-operation determination unit that determines, based on a first signal that represents information on a power flow direction indicating a direction of flow of electrical power between an AC distribution line electrically connecting to an electric vehicle and a substation for supplying AC power to the AC distribution line, whether first AC power on an AC distribution line side is to be transformed into second AC power usable by a load, and if it is determined that transformation is to be performed, generates and outputs a second signal, a voltage instruction value calculator that calculates and outputs a voltage instruction value corresponding to the second signal, and a PWM signal generator that generates a control signal for a power converter circuit operated upon transformation of the first AC power into the second AC power, and outputs the control signal.Type: GrantFiled: August 27, 2015Date of Patent: August 4, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshiaki Takeoka, Shinichi Matsumoto, Shuji Ishikura
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Publication number: 20190225113Abstract: A station building power supply device includes a circuit breaker to disconnect a connection with a train side, a circuit breaker to disconnect a connection with the station load side, a power converter disposed between the circuit breaker and the circuit breaker to convert the regenerative power into the AC power, a housing that houses the circuit breaker, the power converter, and the circuit breaker, a voltage sensor that detects a charged state of the housing, and a control unit that controls operations of the circuit breaker, of the power converter, and of the circuit breaker based on a detection result from the voltage sensor.Type: ApplicationFiled: July 4, 2016Publication date: July 25, 2019Applicant: Mitsubishi Electric CorporationInventors: Toshiaki TAKEOKA, Shinichi MATSUMOTO
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Publication number: 20180236899Abstract: A station building auxiliary power unit includes a start-of-operation determination unit that determines, based on a first signal that represents information on a power flow direction indicating a direction of flow of electrical power between an AC distribution line electrically connecting to an electric vehicle and a substation for supplying AC power to the AC distribution line, whether first AC power on an AC distribution line side is to be transformed into second AC power usable by a load, and if it is determined that transformation is to be performed, generates and outputs a second signal, a voltage instruction value calculator that calculates and outputs a voltage instruction value corresponding to the second signal, and a PWM signal generator that generates a control signal for a power converter circuit operated upon transformation of the first AC power into the second AC power, and outputs the control signal.Type: ApplicationFiled: August 27, 2015Publication date: August 23, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshiaki TAKEOKA, Shinichi MATSUMOTO, Shuji ISHIKURA
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Patent number: 9221346Abstract: A propulsion control apparatus for an electric motor car includes: an inverter apparatus connected to a DC power supply; a motor connected to an output of the inverter apparatus; a converter apparatus connected to an input of the inverter apparatus; and a power storage apparatus connected to an output of the converter apparatus, is configured to charge/discharge a part of power running power or regenerative power of the motor to/from the power storage apparatus. The converter apparatus includes a converter control unit that generates, based on a regeneration state signal as a signal indicating a suppression state of the regenerative power or regenerative torque or regenerative current equivalent to the regenerative power, a charging current command value, generates a charging and discharging current command value of the converter apparatus based on the charging current command value, and performs control.Type: GrantFiled: July 5, 2010Date of Patent: December 29, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hidetoshi Kitanaka, Toshiaki Takeoka, Keita Hatanaka
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Patent number: 8615339Abstract: An electric vehicle control device comprises: a smoothing capacitor to be charged from a DC power supply via a charging resistor; an inverter converting a DC power having been charged in the smoothing capacitor to an AC power to supply it to a load; and a discharging switch causing a voltage having been charged in the smoothing capacitor to discharge via a discharging resistor, and in which a resistor is used as both charging resistor and discharging resistor to simplify a circuit arrangement. In the electric vehicle control device, there are provided a main switch inserted into a main circuit to which a DC power is supplied from the DC power supply, and an auxiliary switch that is connected in parallel to the discharging switch, and is in inverted switching states with respect to the main switch.Type: GrantFiled: April 12, 2006Date of Patent: December 24, 2013Assignee: Mitsubishi Electric CorporationInventors: Yutaka Higuchi, Toshiaki Takeoka
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Publication number: 20120086369Abstract: A propulsion control apparatus for an electric motor car includes: an inverter apparatus connected to a DC power supply; a motor connected to an output of the inverter apparatus; a converter apparatus connected to an input of the inverter apparatus; and a power storage apparatus connected to an output of the converter apparatus, is configured to charge/discharge a part of power running power or regenerative power of the motor to/from the power storage apparatus. The converter apparatus includes a converter control unit that generates, based on a regeneration state signal as a signal indicating a suppression state of the regenerative power or regenerative torque or regenerative current equivalent to the regenerative power, a charging current command value, generates a charging and discharging current command value of the converter apparatus based on the charging current command value, and performs control.Type: ApplicationFiled: July 5, 2010Publication date: April 12, 2012Applicant: Mitsubishi Electric CorporationInventors: Hidetoshi Kitanaka, Toshiaki Takeoka, Keita Hatanaka
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Publication number: 20100318248Abstract: An electric vehicle control device comprises: a smoothing capacitor to be charged from a DC power supply via a charging resistor; an inverter converting a DC power having been charged in the smoothing capacitor to an AC power to supply it to a load; and a discharging switch causing a voltage having been charged in the smoothing capacitor to discharge via a discharging resistor, and in which a resistor is used as both charging resistor and discharging resistor to simplify a circuit arrangement. In the electric vehicle control device, there are provided a main switch inserted into a main circuit to which a DC power is supplied from the DC power supply, and an auxiliary switch that is connected in parallel to the discharging switch, and is in inverted switching states with respect to the main switch.Type: ApplicationFiled: April 12, 2006Publication date: December 16, 2010Applicant: Mitsubishi Electric CorporationInventors: Yutaka Higuchi, Toshiaki Takeoka