Patents by Inventor Masaya Ichinose
Masaya Ichinose 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).
-
Publication number: 20120286511Abstract: A wind turbine generator system can regulate the rotational velocity of the wind turbine within an operation range even when the wind velocity suddenly changes and can perform continuous operation of the wind turbine. The wind turbine generator system includes a generator connected to the shaft of the wind turbine and a converter connected to the generator. When the rotational velocity of the wind turbine is within a predetermined range, power outputted from the generator is controlled so as to follow the instruction concerning the generator output given from the wind turbine to the converter. When the rotational velocity of the wind turbine is out of the predetermined range, the power outputted from the generator is controlled without following the instruction concerning generator output given from the wind turbine to the converter.Type: ApplicationFiled: July 24, 2012Publication date: November 15, 2012Inventors: Akira KIKUCHI, Masaya ICHINOSE, Motoo FUTAMI, Mitsugu MATSUTAKE, Kouichi MIYAZAKI
-
Patent number: 8299642Abstract: A wind power generation system includes an excessive current consumption device, an AC input of which is connected between a generator rotor and an excitation converter on a system failure to detect a DC voltage ascent of the excitation converter and operate a shunt circuit on the system failure.Type: GrantFiled: February 9, 2010Date of Patent: October 30, 2012Assignee: Hitachi, Ltd.Inventors: Masaya Ichinose, Motoo Futami, Hiromitsu Sakai, Kazuhiro Imaie
-
Patent number: 8242620Abstract: A wind turbine generator system can regulate the rotational velocity of the wind turbine within an operation range even when the wind velocity suddenly changes and can perform continuous operation of the wind turbine. The wind turbine generator system includes a generator connected to the shaft of the wind turbine and a converter connected to the generator. When the rotational velocity of the wind turbine is within a predetermined range, power outputted from the generator is controlled so as to follow the instruction concerning the generator output given from the wind turbine to the converter. When the rotational velocity of the wind turbine is out of the predetermined range, the power outputted from the generator is controlled without following the instruction concerning generator output given from the wind turbine to the converter.Type: GrantFiled: May 27, 2011Date of Patent: August 14, 2012Assignee: Hitachi, Ltd.Inventors: Akira Kikuchi, Masaya Ichinose, Motoo Futami, Mitsugu Matsutake, Kouichi Miyazaki
-
Publication number: 20120170333Abstract: A commanded negative-sequence current is added to a commanded current so as to suppress double-frequency pulsation on the DC side. The commanded negative-sequence current is found from three values (i.e., the detected value of positive-sequence voltage vector on the power-supply side, the detected value of negative-sequence voltage vector, and a commanded positive-sequence current). Thus, the pulsations which occur on the DC side of a semiconductor power converter and which have a frequency double the power-supply frequency are suppressed even when the AC power supply is at fault while assuring stability of the current control system, thus permitting stable and continuous operation.Type: ApplicationFiled: March 15, 2012Publication date: July 5, 2012Applicant: Hitachi, Ltd.Inventors: Akira Bando, Yasuhiro Kiyofuji, Masaya Ichinose, Hiromitsu Sakai, Yasuhiro Imazu
-
Patent number: 8129851Abstract: In a wind power generation system, an energy consuming unit is connected to a DC part of a generator-side converter. A shunt circuit is connected between the generator-side converter and a rotor of an AC-excited power generator. In the event of system failure, the switching operation of the converter is stopped, the shunt circuit is put into operation, and the energy consuming unit is put into operation so that DC voltage (voltage of the DC part) is maintained within a prescribed range.Type: GrantFiled: June 2, 2008Date of Patent: March 6, 2012Assignee: Hitachi, Ltd.Inventors: Masaya Ichinose, Motoo Futami, Hiromitsu Sakai, Kojiro Yamashita
-
Publication number: 20120049521Abstract: To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel to synchronizing the stator voltage with the grid voltage. The calculated compensation phase compensation value is used as an initial value for synchronizing at the next synchronizing operation.Type: ApplicationFiled: November 7, 2011Publication date: March 1, 2012Applicant: HITACHI, LTD.Inventors: Masaya ICHINOSE, Motoo FUTAMI, Hiromitsu SAKAI
-
Patent number: 8116914Abstract: A pitch controller, uninterruptible power supply, and rotational speed detector are disposed in the rotor in a wind turbine. When a slip ring failure or wire breakage occurs, the pitch controller internally creates a pitch angle command so as to control the pitch angle.Type: GrantFiled: August 20, 2007Date of Patent: February 14, 2012Assignees: Hitachi, Ltd., Fuji Heavy Industries Ltd.Inventors: Shinya Oohara, Masaya Ichinose, Motoo Futami, Kazuya Tsutsumi, Takashi Shiraishi, Shigeo Yoshida, Hajime Komiyama, Junichi Sugino
-
Patent number: 8097971Abstract: In a wind turbine generator system including an AC exciting converter a grid side converter, and a controller configured to control the AC-exciting converter and the grid side converter, the controller operates a short-circuiting circuit when decrease in the grid voltage and increase in the DC voltage are detected.Type: GrantFiled: May 6, 2009Date of Patent: January 17, 2012Assignee: Hitachi, Ltd.Inventors: Masaya Ichinose, Motoo Futami, Hiromitsu Sakai
-
Patent number: 8093740Abstract: A wind power generation system wherein procedure for controlling the blade pitch is changed in accordance with the rate of decrease in the amplitude of the grid voltage, and when over current occurs in the grid-side power converter, the grid-side power converter is brought into the gate-blocked condition whereas the generator-side power converter continues its operation.Type: GrantFiled: July 1, 2009Date of Patent: January 10, 2012Assignee: Hitachi, Ltd.Inventors: Shinya Oohara, Masaya Ichinose, Motoo Futami, Tadashi Sodeyama
-
Patent number: 8076790Abstract: To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel to synchronizing the stator voltage with the grid voltage. The calculated compensation phase compensation value is used as an initial value for synchronizing at the next synchronizing operation.Type: GrantFiled: May 13, 2011Date of Patent: December 13, 2011Assignee: Hitachi, Ltd.Inventors: Masaya Ichinose, Motoo Futami, Hiromitsu Sakai
-
Publication number: 20110266799Abstract: A wind turbine generator system can regulate the rotational velocity of the wind turbine within an operation range even when the wind velocity suddenly changes and can perform continuous operation of the wind turbine. The wind turbine generator system includes a generator connected to the shaft of the wind turbine and a converter connected to the generator. When the rotational velocity of the wind turbine is within a predetermined range, power outputted from the generator is controlled so as to follow the instruction concerning the generator output given from the wind turbine to the converter. When the rotational velocity of the wind turbine is out of the predetermined range, the power outputted from the generator is controlled without following the instruction concerning generator output given from the wind turbine to the converter.Type: ApplicationFiled: May 27, 2011Publication date: November 3, 2011Inventors: Akira Kikuchi, Masaya Ichinose, Motoo Futami, Mitsugu Matsutake, Kouichi Miyazaki
-
Publication number: 20110215578Abstract: To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel to synchronizing the stator voltage with the grid voltage. The calculated compensation phase compensation value is used as an initial value for synchronizing at the next synchronizing operation.Type: ApplicationFiled: May 13, 2011Publication date: September 8, 2011Applicant: HITACHI, LTD.Inventors: Masaya ICHINOSE, Motoo FUTAMI, HIromitsu SAKAI
-
Publication number: 20110187109Abstract: A power system control apparatus which controls a power system electrically connected to a wind power generation apparatus having a wind turbine which receives wind and rotates, a generator which generates electric power by the rotating wind turbine, and a power converter which converts the electric power generated by the generator. The power system control apparatus includes a voltage detector for detecting a voltage of the power system, a reactive power command value generation unit for generating a reactive power command value from a voltage detection value of the voltage detector, and a transmission unit for transmitting the reactive power command value to the wind power generation apparatus. Output fluctuation of the generator is suppressed, and reactive power according to the reactive power command value is transmitted from the wind power generation apparatus to the power system.Type: ApplicationFiled: April 13, 2011Publication date: August 4, 2011Inventors: Masaya Ichinose, Shinya Oohara, Motoo Futami
-
Patent number: 7964980Abstract: To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel to synchronizing the stator voltage with the grid voltage. The calculated compensation phase compensation value is used as an initial value for synchronizing at the next synchronizing operation.Type: GrantFiled: November 5, 2010Date of Patent: June 21, 2011Assignee: Hitachi, Ltd.Inventors: Masaya Ichinose, Motoo Futami, Hiromitsu Sakai
-
Patent number: 7958717Abstract: A gas turbine power generator plant, intended to reduce its noise by making small the intake and exhaust outlets of the cooing air channel of a case, comprises an engine core in which a turbine, a compressor and a generator are installed on the same axis, a combustor for burning air for combustion compressed by the compressor and supplying the air to the turbine, a radiator for cooling a coolant or a lubricant, a cooling fan for ventilating the radiator with cooling air, an electric power converter for converting electric power generated by the generator, and the case for housing these constituent elements. And, a combustion air channel passing the compressor, the combustor and the turbine and a cooling air channel passing the radiator, the cooling fan and the electric power converter are formed as mutually independent channels from intake to exhaust.Type: GrantFiled: June 9, 2008Date of Patent: June 14, 2011Assignee: Hitachi, Ltd.Inventors: Susumu Nakano, Masaya Ichinose, Masanori Watanabe, Kuniyoshi Tsubouchi, Toshihiko Fukushima, Masatoshi Watanabe
-
Patent number: 7952216Abstract: A wind turbine generator system can regulate the rotational velocity of the wind turbine within an operation range even when the wind velocity suddenly changes and can perform continuous operation of the wind turbine. The wind turbine generator system includes a generator connected to the shaft of the wind turbine and a converter connected to the generator. When the rotational velocity of the wind turbine is within a predetermined range, power outputted from the generator is controlled so as to follow the instruction concerning the generator output given from the wind turbine to the converter. When the rotational velocity of the wind turbine is out of the predetermined range, the power outputted from the generator is controlled without following the instruction concerning generator output given from the wind turbine to the converter.Type: GrantFiled: October 20, 2009Date of Patent: May 31, 2011Assignee: Hitachi, Ltd.Inventors: Akira Kikuchi, Masaya Ichinose, Motoo Futami, Mitsugu Matsutake, Kouichi Miyazaki
-
Patent number: 7952214Abstract: A wind power generation system temporarily stops a power converter when a system disturbance occurs, and reactivates the power converter after detecting a solution of the problem of an influence (overcurrent of a stator, direct current component of a stator, overcurrent of a rotor, etc.) of a fault occurring in a doubly-fed generator during a system fault. During a system fault, a reactive current can be safely output from a doubly-fed generator to an electric power system without destroying equipment of the wind power generation system.Type: GrantFiled: May 28, 2008Date of Patent: May 31, 2011Assignee: Hitachi, Ltd.Inventors: Masaya Ichinose, Shinya Oohara, Motoo Futami, Mitsugu Matsutake, Hiromitsu Sakai
-
Patent number: 7948217Abstract: A distributed generation system that can suppress a voltage fluctuation caused by a distributed generation by an apparatus of a small power capacity in the distributed generation itself and stabilize the power system voltage without inserting interharmonic voltage or current into the power system and without interference among a plurality of distributed generations. Parameter ?(t) varying with time is estimated based on fluctuating component ?P of the active power P generated by the distributed generation and the voltage fluctuating component ?V attributable to the distributed generation developed at the point of connection between the distributed generation and power system. The distributed generation produces reactive power Q=??P or Q=???P, to thereby suppresses only the voltage fluctuation of the power system attributable to the distributed generation.Type: GrantFiled: January 22, 2010Date of Patent: May 24, 2011Assignee: Hitachi, Ltd.Inventors: Shinya Oohara, Masaya Ichinose, Motoo Futami, Mitsugu Matsutake, Shoji Fukuda
-
Publication number: 20110074365Abstract: A wind power generating system includes a unit for eliminating harmonics component of specified-order from inputted current detection value of a grid-side converter and a unit for controlling the grid-side converter using the current detection value in which harmonics are eliminated.Type: ApplicationFiled: August 20, 2010Publication date: March 31, 2011Inventors: Yasuaki NAKAYAMA, Masaya Ichinose, Mitsugu Matsutake
-
Publication number: 20110049889Abstract: To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel to synchronizing the stator voltage with the grid voltage. The calculated compensation phase compensation value is used as an initial value for synchronizing at the next synchronizing operation.Type: ApplicationFiled: November 5, 2010Publication date: March 3, 2011Applicant: HITACHI, LTD.Inventors: Masaya ICHINOSE, Motoo FUTAMI, HIromitsu SAKAI