Patents by Inventor Kenji Funahashi
Kenji Funahashi 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: 11370310Abstract: A vehicle power supply system includes: a main battery; a sub-battery with output voltage; a power converter having an input end connected to the main battery and an output end connected to a motor and converting output power of the main battery to driving power for the motor; a voltage converter connected between the main battery and the sub-battery and stepping down the voltage of the main battery to the voltage of the sub-battery; a charging inlet connected to the main battery and connecting to a power supply device outside a vehicle; a capacitor connected between a positive electrode and a negative electrode of the input end; and a coil connected between the main battery and the voltage converter. The coil is connected to the capacitor not via a charging power path from the charging inlet to the main battery.Type: GrantFiled: December 23, 2019Date of Patent: June 28, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takaji Kikuchi, Kenji Funahashi, Yuji Toba, Daisuke Hoshino
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Publication number: 20200207223Abstract: A vehicle power supply system includes: a main battery; a sub-battery with output voltage; a power converter having an input end connected to the main battery and an output end connected to a motor and converting output power of the main battery to driving power for the motor; a voltage converter connected between the main battery and the sub-battery and stepping down the voltage of the main battery to the voltage of the sub-battery; a charging inlet connected to the main battery and connecting to a power supply device outside a vehicle; a capacitor connected between a positive electrode and a negative electrode of the input end; and a coil connected between the main battery and the voltage converter. The coil is connected to the capacitor not via a charging power path from the charging inlet to the main battery.Type: ApplicationFiled: December 23, 2019Publication date: July 2, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takaji KIKUCHI, Kenji FUNAHASHI, Yuji TOBA, Daisuke HOSHINO
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Patent number: 9219425Abstract: An electric power converter includes a semiconductor module that has a semiconductor element therein, a cooler that cools the semiconductor module, a circuit board provided with a semiconductor control circuit that controls the semiconductor module, a capacitor electrically connected to the semiconductor module, and a quick discharge resistor for discharging an electric charge accumulated in the capacitor. The circuit board is provided with a discharge control circuit that controls a current that flows into the quick discharge resistor. The semiconductor module, the cooler, the capacitor, and the quick discharge resistor are disposed on one major surface of the circuit board.Type: GrantFiled: March 18, 2013Date of Patent: December 22, 2015Assignee: DENSO CORPORATIONInventors: Tomohisa Sano, Takahisa Kaneko, Kenshiro Hida, Kenji Funahashi
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Publication number: 20130272043Abstract: An electric power converter includes a semiconductor module that has a semiconductor element therein, a cooler that cools the semiconductor module, a circuit board provided with a semiconductor control circuit that controls the semiconductor module, a capacitor electrically connected to the semiconductor module, and a quick discharge resistor for discharging an electric charge accumulated in the capacitor. The circuit board is provided with a discharge control circuit that controls a current that flows into the quick discharge resistor. The semiconductor module, the cooler, the capacitor, and the quick discharge resistor are disposed on one major surface of the circuit board.Type: ApplicationFiled: March 18, 2013Publication date: October 17, 2013Applicant: DENSO CORPORATIONInventors: Tomohisa SANO, Takahisa KANEKO, Kenshiro HIDA, Kenji FUNAHASHI
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Patent number: 7207187Abstract: A bus-bar integrated plate and outer frame section, arranged into a double-deck structure and having numerous bus bars molded with a resin molding plate portion, is provided as a wiring for connecting power switching elements and a smoothing capacitor, fixed on an outer surface of a cylindrical wall of a motor housing, to a printed circuit board serving as a control circuit.Type: GrantFiled: April 25, 2003Date of Patent: April 24, 2007Assignee: Denso CorporationInventors: Kenji Funahashi, Ken Hamada, Hiroyuki Kawata, Yasuyuki Ohkouchi
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Publication number: 20060064998Abstract: A bus-bar integrated plate and outer frame section, arranged into a double-deck structure and having numerous bus bars molded with a resin molding plate portion, is provided as a wiring for connecting power switching elements and a smoothing capacitor, fixed on an outer surface of a cylindrical wall of a motor housing, to a printed circuit board serving as a control circuit.Type: ApplicationFiled: November 18, 2005Publication date: March 30, 2006Applicant: Denso CorporationInventors: Kenji Funahashi, Ken Hamada, Hiroyuki Kawata
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Patent number: 7012401Abstract: An inverter includes an upper ECU, a communication microcomputer receiving an instruction from the upper ECU, a motor control microcomputer receiving an instruction from the communication microcomputer, a gate driving circuit controlled by the motor control microcomputer, and a switching element driven by the gate driving circuit for converting a direct current of a high-voltage battery into an alternating current to drive a motor. The communications between the upper ECU and the communication microcomputer is performed according to a CAN protocol. The communications between the communication microcomputer and the motor control microcomputer is performed according to a low-speed serial communication protocol.Type: GrantFiled: April 16, 2004Date of Patent: March 14, 2006Assignee: Denso CorporationInventors: Yasuyuki Ohkouchi, Kenji Funahashi
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Patent number: 7009318Abstract: In an electrical compressor having a motor and an electrical circuit integrated with a compression portion, a part of electrical components of the electrical circuit is disposed in spaces between a cylindrical outer surface of a motor housing and an imaginary flat surface that imaginarily contacts the cylindrical outer surface. Therefore, the spaces can be used effectively, and the electrical compressor can be downsized. Further, the part of the electrical components can be effectively cooled by refrigerant in the motor housing. On the other hand, the outer surface of the motor housing is used as one surface defining an inner space of a casing for accommodating the electrical circuit. In this case, the electrical circuit can be effectively cooled by refrigerant in the motor housing.Type: GrantFiled: January 27, 2003Date of Patent: March 7, 2006Assignee: Denso CorporationInventors: Kunio Iritani, Hiroyuki Kawata, Kenji Funahashi, Yuji Takeo, Yusuke Shindo, Tsuyoshi Takemoto
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Publication number: 20050223727Abstract: A bus-bar integrated plate and outer frame section, arranged into a double-deck structure and having numerous bus bars molded with a resin molding plate portion, is provided as a wiring for connecting power switching elements and a smoothing capacitor, fixed on an outer surface of a cylindrical wall of a motor housing, to a printed circuit board serving as a control circuit.Type: ApplicationFiled: June 8, 2005Publication date: October 13, 2005Applicant: Denso CorporationInventors: Kenji Funahashi, Ken Hamada, Hiroyuki Kawata, Yasuyuki Ohkouchi
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Publication number: 20040222767Abstract: An inverter includes an upper ECU, a communication microcomputer receiving an instruction from the upper ECU, a motor control microcomputer receiving an instruction from the communication microcomputer, a gate driving circuit controlled by the motor control microcomputer, and a switching element driven by the gate driving circuit for converting a direct current of a high-voltage battery into an alternating current to drive a motor. The communications between the upper ECU and the communication microcomputer is performed according to a CAN protocol. The communications between the communication microcomputer and the motor control microcomputer is performed according to a low-speed serial communication protocol.Type: ApplicationFiled: April 16, 2004Publication date: November 11, 2004Applicant: DENSO CORPORATIONInventors: Yasuyuki Ohkouchi, Kenji Funahashi
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Publication number: 20030200761Abstract: A bus-bar integrated plate and outer frame section, arranged into a double-deck structure and having numerous bus bars molded with a resin molding plate portion, is provided as a wiring for connecting power switching elements and a smoothing capacitor, fixed on an outer surface of a cylindrical wall of a motor housing, to a printed circuit board serving as a control circuit.Type: ApplicationFiled: April 25, 2003Publication date: October 30, 2003Applicant: Denso CorporationInventors: Kenji Funahashi, Ken Hamada, Hiroyuki Kawata, Yasuyuki Ohkouchi
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Publication number: 20030143090Abstract: In an electrical compressor having a motor and an electrical circuit integrated with a compression portion, a part of electrical components of the electrical circuit is disposed in spaces between a cylindrical outer surface of a motor housing and an imaginary flat surface that imaginarily contacts the cylindrical outer surface. Therefore, the spaces can be used effectively, and the electrical compressor can be downsized. Further, the part of the electrical components can be effectively cooled by refrigerant in the motor housing. On the other hand, the outer surface of the motor housing is used as one surface defining an inner space of a casing for accommodating the electrical circuit. In this case, the electrical circuit can be effectively cooled by refrigerant in the motor housing.Type: ApplicationFiled: January 27, 2003Publication date: July 31, 2003Inventors: Kunio Iritani, Hiroyuki Kawata, Kenji Funahashi, Yuji Takeo, Yusuke Shindo, Tsuyoshi Takemoto