1
Atsushi Shimada, Kazumasa Ide, Shiro Yamaoka: Engine cogeneration system. Hitachi, Crowell & Moring, November 22, 2005: US06966185 (12 worldwide citation)

In an engine cogeneration system in which power generators 5 to 8 are driven by a plurality of engines 1 to 4 to thereby supply electric power to power load 22 of a general household, at the same time, heat produced by cooling each of the engines 1 to 4 and heat generated from the exhaust gas are re ...


2
Kazumasa Ide, Miyoshi Takahashi, Mamoru Nemoto, Seiji Takahashi: Variable-speed electromechanical energy converter. Hitachi, Antonelli Terry Stout & Kraus, April 30, 2002: US06380655 (11 worldwide citation)

A variable-speed electromechanical energy converter includes a wound-type induction motor and a power rectifier connected to a secondary winding of the motor to convert AC power produced by the motor into DC power. A chopper is connected to an output of the power converter to control the output ther ...


3
Shinichi Wakui, Kazumasa Ide, Haruo Koharagi, Miyoshi Takahashi, Kado Miyakawa, Yasuomi Yagi: Turbine generator. Hitachi, Fay Sharpe Beall Fagan Minnich & McKee, November 21, 1995: US05469009 (10 worldwide citation)

The rotor 2 of a rotating field type turbine generator is provided with slots 3 for accommodating the field windings, wedges 4 positioned at the portions of the magnetic poles on the rotor 2 for holding the field windings and wedges 5 positioned between the magnetic poles on the rotor. These wedges ...


4
Mamoruo Kimura, Kazumasa Ide, Motonobu Iizuka, Shuji Mizutani, Tetsuo Fujigaki, Kengo Iwashige, Hisato Tagawa, Yusaku Maruno: Permanent magnet type electric rotating machine and wind turbine electric power generation system. Hitachi, Antonelli Terry Stout & Kraus, November 17, 2009: US07619332 (9 worldwide citation)

A permanent magnet type electric rotating machine comprises a stator having a distributed winding and a permanent magnet rotor, wherein the permanent magnet rotor is provided with a wind passage in an axial direction thereof.


5
Mamoru Kimura, Motoo Futami, Masaya Ichinose, Kazumasa Ide, Kazuhiro Imaie: Electrical rotating machine control unit and power generation system. Hitachi, Crowell & Moring, September 18, 2007: US07271500 (9 worldwide citation)

Because of the necessity of resolver for detecting a rotating position, which is very expensive, and noise suppression of the rotating position signal line on a doubly-fed machine, cost increase of the generator and reduced reliability due to possible failures are inevitable. In order to solve such ...


6
Shinichi Wakui, Miyoshi Takahashi, Kazumasa Ide, Ryoichi Shiobara, Hidenari Otani, Akitomi Semba, Junji Sato: Armature winding and rotating electric machine using the same. Hitachi, Antonelli Terry Stout & Kraus, March 19, 2002: US06359361 (8 worldwide citation)

In order to make any voltage imbalance between the winding circuits of each phase small and to simplify the edge structure of the armature winding, in a rotating electric machine of four poles, having slots of 9n (1≦n≦7) pieces provided for the stator core with a double-layer winding per each ...


7
Kenichi Hattori, Kazumasa Ide, Akiyoshi Komura, Takashi Watanabe, Ryoichi Shiobara, Yasuomi Yagi, Kengo Iwashige, Keiji Kobashi: Dynamo-electric machine. Hitachi, McDermott Will & Emery, July 4, 2006: US07071586 (7 worldwide citation)

An electric rotating machine capable of lowering the temperature of a rotor disposed, wherein at least one of closed ventilation loops for cooling is formed, one of the loops constituting a ventilation passage communicating with an exhaust side through a heat source of the end of the generator to a ...


8
Kazumasa Ide, Kenichi Hattori, Akiyoshi Komura, Yoko Yamashina, Tadashi Sonobe, Akitomi Semba, Junji Sato, Ryoichi Shiobara: Rotating electric machine and cooling method thereof. Hitachi, Antonelli Terry Stout & Kraus, August 30, 2005: US06936939 (7 worldwide citation)

A rotating electric machine having a plurality of ventilating passages formed between a stator frame and a stator iron core and coolers which cool a coolant being provided in the plurality of the ventilating passages. A ventilating circuit in which at least a portion of the coolant which is cooled b ...


9
Mamoru Kimura, Motoo Futami, Masaya Ichinose, Kazumasa Ide, Kazuhiro Imaie: Electrical rotating machine control unit and power generation system. Hitachi, Crowell & Moring, January 2, 2007: US07157804 (6 worldwide citation)

Because of the necessity of resolver for detecting a rotating position, which is very expensive, and noise suppression of the rotating position signal line on a doubly-fed machine, cost increase of the generator and reduced reliability due to possible failures are inevitable. In order to solve such ...


10
Atsushi Shimada, Kazumasa Ide, Shiro Yamaoka: Engine cogeneration system. Hitachi, Crowell & Moring, October 31, 2006: US07127896 (6 worldwide citation)

In an engine cogeneration system in which power generators 5 to 8 are driven by a plurality of engines 1 to 4 to thereby supply electric power to power load 22 of a general household, at the same time, heat produced by cooling each of the engines 1 to 4 and heat generated from the exhaust gas are re ...