Patents by Inventor Masahiko Endou
Masahiko Endou 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: 7400111Abstract: An on-vehicle battery and electric unit assembly including: a battery mounted to a body of a vehicle driven by an engine; and an electric unit in which components of an electrical circuit connected to the battery are housed in a unit case provided with a positive DC terminal and a negative DC terminal connected to a positive terminal and a negative terminal of the battery, wherein the electric unit is placed adjacent to the battery, and the positive terminal and the negative terminal of the battery are connected to the positive DC terminal and the negative DC terminal of the electric unit by a positive busbar and a negative busbar, respectively.Type: GrantFiled: June 8, 2006Date of Patent: July 15, 2008Assignee: Kokusan Denki Co., Ltd.Inventors: Kazuyohsi Kishibata, Masahiko Endou
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Patent number: 7372677Abstract: A control apparatus for an internal combustion engine-driven vehicle equipped with a power supply unit having an AC generator driven by an internal combustion engine, and a power converter which converts an output voltage from the AC generator into an AC voltage of a certain frequency, which comprises a leakage detection means which detects an occurrence of electric leakage in the power supply unit, a leakage occurrence position identification means which identifies a leakage occurrence position, and an electric shock preventing control means which performs control for preventing electric shock on at least one of the internal combustion engine and the power converter, while allowing a rotational speed of the internal combustion engine to increase to a speed at which travel of the vehicle is enabled, when the occurrence of electric leakage is detected.Type: GrantFiled: July 6, 2005Date of Patent: May 13, 2008Assignee: Kokusan Denki Co., Ltd.Inventors: Kazuyoshi Kishibata, Masahiko Endou
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Patent number: 7295016Abstract: An electric leakage detection system having: a detection point forming circuit which forms a detection point being connected through three resistors which are star-connected to a three-phase output line of an AC generator; a voltage detection circuit which detects a voltage across the detection point and ground; and an electric leakage detecting part which detects existence of an electric leakage from a period of the detected voltage and determines an occurrence position of the electric leakage from a period of the detected voltage.Type: GrantFiled: June 16, 2005Date of Patent: November 13, 2007Assignee: Kokusan Denki Co., Ltd.Inventors: Kazuyoshi Kishibata, Masahiko Endou
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Patent number: 7289901Abstract: A vehicle-mounted power generator set including: an AC generator driven by an engine of a vehicle; an electric power conversion portion that converts an output of the AC generator into an AC output having commercial frequency; a controller having electric power conversion portion control means for controlling the conversion portion to generate an AC output having commercial frequency when a control mode is a power generation mode, and engine control means for controlling the engine to rotate at a rotational speed suitable for supplying electric power from the conversion portion to a load when the control mode is the power generation mode and controlling the engine to be suitable for driving the vehicle when the control mode is the vehicle driving mode; and a control switch inserted between each output terminal of the AC generator and each input terminal of the electric power conversion portion, and controlled to be in an ON state when the control mode is the power generation mode and in an OFF state when theType: GrantFiled: November 8, 2005Date of Patent: October 30, 2007Assignee: Kokusan Denki Co., Ltd.Inventors: Kazuyoshi Kishibata, Masahiko Endou, Tomoaki Sekita
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Patent number: 7256507Abstract: An inverter controlled generator set including: a power supply unit that uses a generator driven by an engine as a power supply to output a DC voltage; an inverter device that converts the output voltage of the power supply unit into an AC voltage; and a rotational speed control unit that controls a rotational speed of the engine so as to be kept at a target rotational speed suitable for a load applied to the inverter device, wherein the rotational speed control unit is comprised so that a settling time when the rotational speed of the engine is caused to converge to the target rotational speed in a state where the load is above a set value is longer than a settling time when the rotational speed is caused to converge to the target rotational speed in a state where the load is below the set value, in order to minimize an operation sound of the engine when the load is intermittently driven.Type: GrantFiled: August 22, 2006Date of Patent: August 14, 2007Assignee: Kokusan Denki Co., Ltd.Inventors: Masahiko Endou, Masanori Nakagawa, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Patent number: 7245036Abstract: An inverter controlled generator set including: a power supply unit that uses a generator driven by an engine as a power supply to output a DC voltage; an inverter device that converts the output voltage of the power supply unit into an AC voltage; and a rotational speed control unit that controls a rotational speed of the engine so as to be kept at a target rotational speed suitable for a load applied to the inverter device, wherein the rotational speed control unit is comprised so that a settling time when the rotational speed of the engine is caused to converge to the target rotational speed in a state where the load is above a set value is longer than a settling time when the rotational speed is caused to converge to the target rotational speed in a state where the load is below the set value, in order to minimize an operation sound of the engine when the load is intermittently driven.Type: GrantFiled: August 22, 2006Date of Patent: July 17, 2007Assignee: Kokusan Denki Co., Ltd.Inventors: Masahiko Endou, Masanori Nakagawa, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Patent number: 7157885Abstract: A method for controlling an inverter controlled generator set which comprises a DC power source section having as a power source a generator driven by an engine and an inverter which converts an output of said DC power source section into an AC output, the method comprising a step of controlling a rotational speed of the engine so that the AC output suitable for driving a load is output from the inverter; wherein, after the engine is started, the rotational speed of the engine is controlled by a constant speed control mode for maintaining the rotational speed of the engine at a set rotational speed, and the rotational speed of the engine is increased to the set rotational speed; and wherein an operation of the inverter is started after the rotational speed of the engine reaches the set rotational speed.Type: GrantFiled: October 21, 2004Date of Patent: January 2, 2007Assignee: Kokusan Denki Co., Ltd.Inventors: Masanori Nakagawa, Masahiko Endou, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Publication number: 20060284843Abstract: An inverter controlled generator set including: a power supply unit that uses a generator driven by an engine as a power supply to output a DC voltage; an inverter device that converts the output voltage of the power supply unit into an AC voltage; and a rotational speed control unit that controls a rotational speed of the engine so as to be kept at a target rotational speed suitable for a load applied to the inverter device, wherein the rotational speed control unit is comprised so that a settling time when the rotational speed of the engine is caused to converge to the target rotational speed in a state where the load is above a set value is longer than a settling time when the rotational speed is caused to converge to the target rotational speed in a state where the load is below the set value, in order to minimize an operation sound of the engine when the load is intermittently driven.Type: ApplicationFiled: August 22, 2006Publication date: December 21, 2006Applicant: Kokusan Denki Co., Tld.Inventors: Masahiko Endou, Masanori Nakagawa, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Publication number: 20060279087Abstract: An inverter controlled generator set including: a power supply unit that uses a generator driven by an engine as a power supply to output a DC voltage; an inverter device that converts the output voltage of the power supply unit into an AC voltage; and a rotational speed control unit that controls a rotational speed of the engine so as to be kept at a target rotational speed suitable for a load applied to the inverter device, wherein the rotational speed control unit is comprised so that a settling time when the rotational speed of the engine is caused to converge to the target rotational speed in a state where the load is above a set value is longer than a settling time when the rotational speed is caused to converge to the target rotational speed in a state where the load is below the set value, in order to minimize an operation sound of the engine when the load is intermittently driven.Type: ApplicationFiled: August 22, 2006Publication date: December 14, 2006Applicant: Kokusan Denki Co., Tld.Inventors: Masahiko Endou, Masanori Nakagawa, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Publication number: 20060279086Abstract: An on-vehicle battery and electric unit assembly including: a battery mounted to a body of a vehicle driven by an engine; and an electric unit in which components of an electrical circuit connected to the battery are housed in a unit case provided with a positive DC terminal and a negative DC terminal connected to a positive terminal and a negative terminal of the battery, wherein the electric unit is placed adjacent to the battery, and the positive terminal and the negative terminal of the battery are connected to the positive DC terminal and the negative DC terminal of the electric unit by a positive busbar and a negative busbar, respectively.Type: ApplicationFiled: June 8, 2006Publication date: December 14, 2006Applicant: Kokusan Denki Co., Ltd.Inventors: Kazuyoshi Kishibata, Masahiko Endou
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Patent number: 7123495Abstract: An inverter controlled generator set including: a power supply unit that uses a generator driven by an engine as a power supply to output a DC voltage; an inverter device that converts the output voltage of the power supply unit into an AC voltage; and a rotational speed control unit that controls a rotational speed of the engine so as to be kept at a target rotational speed suitable for a load applied to the inverter device, wherein the rotational speed control unit is comprised so that a settling time when the rotational speed of the engine is caused to converge to the target rotational speed in a state where the load is above a set value is longer than a settling time when the rotational speed is caused to converge to the target rotational speed in a state where the load is below the set value, in order to minimize an operation sound of the engine when the load is intermittently driven.Type: GrantFiled: August 4, 2004Date of Patent: October 17, 2006Assignee: Kokusan Denki Co., Ltd.Inventors: Masahiko Endou, Masanori Nakagawa, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Patent number: 7091812Abstract: An inverter unit comprising component parts including at least an inverter and a filter which removes a high harmonic wave component from an output of said inverter, wherein said component parts are housed in an aluminum case having a bottom wall portion and a side wall portion, said filter includes a coil which is wound around a core extending straight and is arranged at a position closed to one end of said case, an end portion of said core being wound with said coil is arranged closed to an inner surface of said side wall portion of the case, and a ferromagnetic plate, which leads magnetic flux coming in and out said end portion of the core arranged closed to said wall portion of the case to the direction along the inner surface of the side wall portion of the case, is disposed between said end portion of said core and said inner surface of said side wall portion of the case.Type: GrantFiled: August 4, 2004Date of Patent: August 15, 2006Assignee: Kokusan Denki Co., Ltd.Inventors: Yoshihiro Sugisawa, Masahiko Endou, Masanori Nakagawa, Katsumi Yamamoto, Kaoru Shinba
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Publication number: 20060103239Abstract: A vehicle-mounted power generator set including: an AC generator driven by an engine of a vehicle; an electric power conversion portion that converts an output of the AC generator into an AC output having commercial frequency; a controller having electric power conversion portion control means for controlling the conversion portion to generate an AC output having commercial frequency when a control mode is a power generation mode, and engine control means for controlling the engine to rotate at a rotational speed suitable for supplying electric power from the conversion portion to a load when the control mode is the power generation mode and controlling the engine to be suitable for driving the vehicle when the control mode is the vehicle driving mode; and a control switch inserted between each output terminal of the AC generator and each input terminal of the electric power conversion portion, and controlled to be in an ON state when the control mode is the power generation mode and in an OFF state when theType: ApplicationFiled: November 8, 2005Publication date: May 18, 2006Applicant: Kokusan Denki Co., Ltd.Inventors: Kazuyoshi Kishibata, Masahiko Endou, Tomoaki Sekita
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Publication number: 20060006846Abstract: A control apparatus for an internal combustion engine-driven vehicle equipped with a power supply unit having an AC generator driven by an internal combustion engine, and a power converter which converts an output voltage from the AC generator into an AC voltage of a certain frequency, which comprises a leakage detection means which detects an occurrence of electric leakage in the power supply unit, a leakage occurrence position identification means which identifies a leakage occurrence position, and an electric shock preventing control means which performs control for preventing electric shock on at least one of the internal combustion engine and the power converter, while allowing a rotational speed of the internal combustion engine to increase to a speed at which travel of the vehicle is enabled, when the occurrence of electric leakage is detected.Type: ApplicationFiled: July 6, 2005Publication date: January 12, 2006Applicant: Kokusan Denki Co., Ltd.Inventors: Kazuyoshi Kishibata, Masahiko Endou
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Publication number: 20050280422Abstract: An electric leakage detection system having: a detection point forming circuit which forms a detection point being connected through three resistors which are star-connected to a three-phase output line of an AC generator; a voltage detection circuit which detects a voltage across the detection point and ground; an electric leakage detecting part which detects existence of the electric leakage from a period of the voltage detected by the voltage detection circuit; and electric leakage occurrence position determination means which determines an occurrence position of the electric leakage from a period of the voltage across the detection point and ground, and detecting the electric leakage at a position apart from the generator without laying around a grounding conductor which grounds a neutral point of the generator.Type: ApplicationFiled: June 16, 2005Publication date: December 22, 2005Applicant: Kokusan Denki Co., Ltd.Inventors: Kazuyoshi Kishibata, Masahiko Endou
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Publication number: 20050242783Abstract: An inverter controlled generator set including: an AC generator driven by a prime mover; a converter which converts an output of the AC generator into a DC output; an inverter which converts an output of the converter into an AC output having a predetermined frequency and a rated voltage value; and protection means for blocking the output of the inverter when an output current of the inverter exceeds a predetermined limit value, wherein the AC generator has a drooping characteristic that an output voltage of the AC generator is lowered following an increase of an output current of the AC generator, and wherein the drooping characteristic is a characteristic that the output voltage of the AC generator becomes less than the rated voltage value, when a value of the output current of the AC generator exceeds a set value which is set between the rated value and the limit value of the output current of the inverter.Type: ApplicationFiled: April 26, 2005Publication date: November 3, 2005Applicant: Kokusan Denki Co., Ltd.Inventors: Masanori Nakagawa, Masahiko Endou, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Publication number: 20050104377Abstract: A method for controlling an inverter controlled generator set which comprises a DC power source section having as a power source a generator driven by an engine and an inverter which converts an output of said DC power source section into an AC output, the method comprising a step of controlling a rotational speed of the engine so that the AC output suitable for driving a load is output from the inverter; wherein, after the engine is started, the rotational speed of the engine is controlled by a constant speed control mode for maintaining the rotational speed of the engine at a set rotational speed, and the rotational speed of the engine is increased to the set rotational speed; and wherein an operation of the inverter is started after the rotational speed of the engine reaches the set rotational speed.Type: ApplicationFiled: October 21, 2004Publication date: May 19, 2005Applicant: Kokusan Denki Co., Ltd.Inventors: Masanori Nakagawa, Masahiko Endou, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Publication number: 20050029992Abstract: An inverter controlled generator set including: a power supply unit that uses a generator driven by an engine as a power supply to output a DC voltage; an inverter device that converts the output voltage of the power supply unit into an AC voltage; and a rotational speed control unit that controls a rotational speed of the engine so as to be kept at a target rotational speed suitable for a load applied to the inverter device, wherein the rotational speed control unit is comprised so that a settling time when the rotational speed of the engine is caused to converge to the target rotational speed in a state where the load is above a set value is longer than a settling time when the rotational speed is caused to converge to the target rotational speed in a state where the load is below the set value, in order to minimize an operation sound of the engine when the load is intermittently driven.Type: ApplicationFiled: August 4, 2004Publication date: February 10, 2005Applicant: Kokusan Denki Co., Ltd.Inventors: Masahiko Endou, Masanori Nakagawa, Kaoru Shinba, Katsumi Yamamoto, Yoshihiro Sugisawa
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Publication number: 20050030769Abstract: An inverter unit comprising component parts including at least an inverter and a filter which removes a high harmonic wave component from an output of said inverter, wherein said component parts are housed in an aluminum case having a bottom wall portion and a side wall portion, said filter includes a coil which is wound around a core extending straight and is arranged at a position closed to one end of said case, an end portion of said core being wound with said coil is arranged closed to an inner surface of said side wall portion of the case, and a ferromagnetic plate, which leads magnetic flux coming in and out said end portion of the core arranged closed to said wall portion of the case to the direction along the inner surface of the side wall portion of the case, is disposed between said end portion of said core and said inner surface of said side wall portion of the case.Type: ApplicationFiled: August 4, 2004Publication date: February 10, 2005Applicant: Kokusan Denki Co., LtdInventors: Yoshihiro Sugisawa, Masahiko Endou, Masanori Nakagawa, Katsumi Yamamoto, Kaoru Shinba
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Publication number: 20040233590Abstract: An inverter power supply device having first and second inverter units operated in series or parallel operation, and a controller to control said inverter units, wherein one output terminal of the first inverter unit is connected to one output terminal of the second inverter unit, and another output terminal of the first inverter unit and another output terminal of the second inverter unit are connected to high-voltage-load connection terminals, the one output terminal and the other output terminal of one of the inverter units are connected to one and the other of low-voltage-load connection terminals, a switch is connected between the high-voltage-load connection terminals, and said controller controls said inverter units so that outputs of said units are added together in phase and applied between the high-voltage-load connection terminals when said switch is turned off, and the outputs of said units are added together in phase and applied between the low-voltage-load connection terminals when said switch iType: ApplicationFiled: May 19, 2004Publication date: November 25, 2004Inventors: Masanori Nakagawa, Masahiko Endou, Katsumi Yamamoto, Kaoru Shinba, Yoshihiro Sugisawa