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1. 发明专利

DE4300574A1 Rectifier circuit for vehicle ac generator - has mesa isolated Zener diode rectifiers mounted inside generator on heat sinks cooled with fan 未知
公开(公告)号：DE4300574A1
公开(公告)日：1993-07-15
申请号：DE4300574
申请日：1993-01-12
申请人： HITACHI LTD
发明人： SAITO AKIHIRO , MASHINO KEIICHI , HONDA YOSHIAKI , MAEDA YUUJI , NARITA KAZUTOYO
IPC分类号： H02K11/02 , H01L25/11 , H02J7/24 , H02K11/04 , H02K19/28 , H02K19/36 , H02P9/30
摘要： The rectifier circuit includes an ac generator whose Y-shaped windings (11u, 11v, 11w) are connected to the rectifiers (12, 13...19) which are mounted inside generator on a heat sink and cooled with a fan. The rectifiers are Zener diodes produced by doping of p-type silicon substrates, and isolated by mesa-etching. A power transistor (21) feeds the excitation winding of the generator. A diode (24) is used as a snubber. Another power transistor (22) is connected to the battery (5) through a working lamp (3) and the ignition switch (4). A control circuit (23) drives the power transistors. The loads (6, 6') are connected to the rectifier circuit through the switches (7, 7'). ADVANTAGE - Reliable operation of electronic components in high temperature environment, reduced loading of battery due to low voltage current of diodes, low electromagnetic noise radiation.

2. 发明专利

DE4300574C2 未知
公开(公告)号：DE4300574C2
公开(公告)日：1997-04-03
申请号：DE4300574
申请日：1993-01-12
申请人： HITACHI LTD
发明人： SAITO AKIHIRO , MASHINO KEIICHI , HONDA YOSHIAKI , MAEDA YUUJI , NARITA KAZUTOYO
IPC分类号： H02K11/02 , H01L25/11 , H02J7/24 , H02K11/04 , H02K19/28 , H02K19/36 , H02P9/30 , H02P9/48 , H01L23/28 , H01L23/36 , H01L29/866
摘要： A vehicle alternator output rectifier instrument in which mesa structure Zener diodes, formed by diffusion of impurity on a P-type silicon substrate, are used as rectifier elements which are used in rectifier circuits for rectifying an alternate current output of a vehicle alternator. Since the vehicle alternator output rectifier instrument employs the above Zener diodes, this rectifier instrument can endure high temperature circumstances, considerably reduce a reverse leakage current to thereby prevent a battery voltage from being discharged and reduce a radio noise to thereby reduce a bad influence exerted upon an electronic device serving as a load.

3. 发明专利

DE69025310D1 未知
公开(公告)号：DE69025310D1
公开(公告)日：1996-03-21
申请号：DE69025310
申请日：1990-12-13
申请人： HITACHI LTD
发明人： MARUMOTO KATSUJI , MIYASHITA KUNIO , TAHARA KAZUO , MASHINO KEIICHO , KANKE ATSUSHI , SAITO AKIHIRO
IPC分类号： H02J7/14 , H02J7/24 , H02P9/30
摘要： A control device for an electric generator for use with a vehicle engine includes an armature winding (stator) (266) and a field winding (rotor) (2) driven by the vehicle engine. A chopper (71) is provided for controlling the field current of the field winding and a pulse width modulator (7) is provided for controlling the duty cycle of the chopper in response to the operating conditions of the engine. A voltage feedback loop is provided from a normally provided battery (6) which loop incorporates a detector (13) for detecting the actual battery voltage and a comparator (12) for comparing the battery voltage with a predetermined set voltage so that the difference in voltage is rendered to zero. The invention additionally provides a current feedback loop for controlling a deviation between a current command value (Ifo) determining the duty of the chopper and an actual current (Iff) flowing through the field winding so as to be substantially zero. There is also disclosed means for adaptively modifying the current command signal and means for controlling the current demanded by the field winding to reduce the torque demanded by the generator at times, inter alia, of acceleration and engine knocking.

4. 发明专利

DE69025310T2 未知
公开(公告)号：DE69025310T2
公开(公告)日：1996-10-17
申请号：DE69025310
申请日：1990-12-13
申请人： HITACHI LTD
发明人： MARUMOTO KATSUJI , MIYASHITA KUNIO , TAHARA KAZUO , MASHINO KEIICHO , KANKE ATSUSHI , SAITO AKIHIRO
IPC分类号： H02J7/14 , H02J7/24 , H02P9/30
摘要： A control device for an electric generator for use with a vehicle engine includes an armature winding (stator) (266) and a field winding (rotor) (2) driven by the vehicle engine. A chopper (71) is provided for controlling the field current of the field winding and a pulse width modulator (7) is provided for controlling the duty cycle of the chopper in response to the operating conditions of the engine. A voltage feedback loop is provided from a normally provided battery (6) which loop incorporates a detector (13) for detecting the actual battery voltage and a comparator (12) for comparing the battery voltage with a predetermined set voltage so that the difference in voltage is rendered to zero. The invention additionally provides a current feedback loop for controlling a deviation between a current command value (Ifo) determining the duty of the chopper and an actual current (Iff) flowing through the field winding so as to be substantially zero. There is also disclosed means for adaptively modifying the current command signal and means for controlling the current demanded by the field winding to reduce the torque demanded by the generator at times, inter alia, of acceleration and engine knocking.

5. 发明专利

DE3910451A1 Method for cooling a three-phase alternator, and an oil-cooled three-phase alternator 未知
公开(公告)号：DE3910451A1
公开(公告)日：1989-10-12
申请号：DE3910451
申请日：1989-03-31
申请人： HITACHI LTD
发明人： SAITO AKIHIRO
IPC分类号： H02K9/19
摘要： A method is specified for cooling a three-phase alternator which is driven by an internal combustion engine. The excitation winding (7) of the three-phase alternator consists of claw magnets (9) and a cylindrical core (8) so that an oil passage (12, 13) is formed in the zones in which the cylindrical core (8) and the rotor shaft (3) are opposite one another and in the zones in which the cylindrical core (8) and the claw magnet pole (9) are opposite one another. This oil passage (12, 13) is connected at one end to an oil supply located outside the three-phase alternator, so that oil can be introduced into the oil passage during operation of the three-phase alternator; a centrifugal force acts on the oil as a result of the rotation of the rotating excitation winding, so that the oil is sprayed onto the stator winding (23) in the form of vapour or mist.

6. 发明专利

JP2006316768A Engine start system, method, and rotary electric machine for starting engine 审中-公开
标题翻译：发动机起动系统，方法和旋转电机起动发动机
公开(公告)号：JP2006316768A
公开(公告)日：2006-11-24
申请号：JP2005142945
申请日：2005-05-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SAITO AKIHIRO
IPC分类号： F02N11/08 , F02D29/02 , F02N15/00
CPC分类号： F02N11/0866 , F02N11/006 , F02N11/0814 , F02N2011/0896
摘要： PROBLEM TO BE SOLVED: To provide an engine start system capable of enhancing energy-saving efficiency and capable of achieving smooth and certain restart of an engine from idle stop.
SOLUTION: In this engine start system, a motor generator 3 having two armature coils 31 and 32 is adopted, and the respective armature coils are connected to second and first storage batteries 6 and 4 through two inverters 5 and 7. When starting the engine, electric power is supplied to a starter motor 2 from the first storage battery 4. When restarting the engine from idle stop, the electric power is supplied to the two armature coils 31 and 32 from the two storage batteries 6 and 4 through the two inverters 5 and 7, and the engine is restarted by two armature type synchronous motors. During engine operation or brake control, the two inverters 5 and 7 are independently controlled, and the storage batteries 4 and 6 are charged (regenerated).
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够提高节能效率并能够从怠速停止实现发动机平稳且一定重启的发动机起动系统。解决方案：在这种发动机起动系统中，采用具有两个电枢线圈31和32的电动发电机3，并且各个电枢线圈通过两个逆变器5和7连接到第二和第一蓄电池6和4.当起动发动机从第一蓄电池4向起动电动机2提供电力。当从怠速停止再起动发动机时，通过两个蓄电池6和4向两个电枢线圈31和32提供电力两个逆变器5和7，并且发动机由两个电枢型同步电动机重新启动。在发动机运转或制动控制期间，两个变换器5和7被独立地控制，蓄电池4和6被充电（再生）。版权所有（C）2007，JPO＆INPIT

7. 发明专利

JP2006261468A Noise filter and its manufacturing method 审中-公开
标题翻译：噪声滤波器及其制造方法
公开(公告)号：JP2006261468A
公开(公告)日：2006-09-28
申请号：JP2005078378
申请日：2005-03-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SAITO AKIHIRO , HAMADA HARUKI , NAKAJIMA KENICHIRO , ISHIZUKA TOSHIOMI , NAKATSU KINYA
IPC分类号： H01F37/00
摘要： PROBLEM TO BE SOLVED: To provide a common noise filter for an inverter being a small size, having a high performance and an excellent composability and being a low cost.
SOLUTION: U-shaped metal plates 203a, 204a and 205a and the metal plates 201a and 202a for connection are arranged around a doughnut-shaped magnetic core covered with an insulating section, and a coil is formed by electrically connecting these metal plates by using screws 25. The insulating section composed of a resin has a projection 24a arranged between the metal plates 201a and 202a for connection, and the security of an insulating property is ensured.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供具有高性能和优异的可组合性并且成本低的用于小尺寸的逆变器的公共噪声滤波器。解决方案：U形金属板203a，204a和205a以及用于连接的金属板201a和202a布置在被绝缘部分覆盖的环形磁芯周围，并且线圈通过电连接这些金属板通过使用螺钉25.由树脂构成的绝缘部具有布置在金属板201a和202a之间用于连接的突起24a，并且确保了绝缘性的安全性。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JP2006166538A Rotary electric machine for vehicle 审中-公开
标题翻译：车用旋转电机
公开(公告)号：JP2006166538A
公开(公告)日：2006-06-22
申请号：JP2004352239
申请日：2004-12-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SAITO AKIHIRO , MASUNO KEIICHI , SHIRAKAWA SHINJI
IPC分类号： H02K9/22 , H02K9/06 , H02K11/00 , H02K11/04
摘要： PROBLEM TO BE SOLVED: To provide a rotary electric machine for a vehicle enhanced in reliability by improving the cooling performance of a power module. SOLUTION: The power module 18 for power is composed of: a cooling plate 17; semiconductor elements 20, 21 mounted on the cooling plate 17 via insulating boards 22, 23; and cooling fins 17a formed on a surface opposite to installation surfaces of the insulating boards of the cooling plate 17. A clearance is formed between the installation surfaces of cooling fins of the cooling plate 17 and the external surface of a rear bracket 10, and air introduced from an air take-in part 15a of a cover 15 is introduced between the installation surfaces of the cooling fins 17a of the cooling plate 17 and the external surface of the rear bracket 10. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过提高功率模块的冷却性能来提供可靠性提高的车辆用旋转电机。解决方案：用于动力的动力模块18包括：冷却板17; 通过绝缘板22,23安装在冷却板17上的半导体元件20,21; 以及形成在与冷却板17的绝缘板的安装表面相对的表面上的冷却片17a。在冷却板17的冷却翅片的安装表面和后支架10的外表面之间形成间隙，并且空气从冷却板17的冷却翅片17a的安装面和后支架10的外表面之间引入从盖15的吸气部15a引入的气体导入部。（C）2006，JPO＆NCIPI

9. 发明专利

JPH05161315A ALTERNATOR FOR VEHICLE 失效
公开(公告)号：JPH05161315A
公开(公告)日：1993-06-25
申请号：JP31644391
申请日：1991-11-29
申请人： HITACHI LTD
发明人： HONDA YOSHIAKI , SAITO AKIHIRO
IPC分类号： H02K5/10 , H02K5/14 , H02K13/00
摘要： PURPOSE:To provide a structure of a slip ring having excellent waterproofness and excellent assembly properties. CONSTITUTION:A substantially cylindrical slip ring cover 18 is disposed at an outer peripheral side of a slip ring 9. An opening 18b to be engaged with a brush holder 13 is provided on an upper surface of the cover. Rugged parts 18a are formed in the opening and on a lower surface of the holder to be engaged fixedly with each other. A substantially archlike protrusion 18c is formed at one axial end side of the opening, and contained in a containing part of the holder. A plurality of protrusions 18d are formed on the outer periphery of the cover, and tunnels 18g communicating with the inside of the cover is provided inside the protrusions. Further, sealing materials 17a, 17b having excellent elasticity are disposed at both axial end faces of the cover.

10. 发明专利

JPH04364339A AC GENERATOR FOR VEHICLE 失效
公开(公告)号：JPH04364339A
公开(公告)日：1992-12-16
申请号：JP13999791
申请日：1991-06-12
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： SAITO AKIHIRO , HONDA YOSHIAKI , KANBARA HIDEAKI , ISHIHARA KENJI , MURAMOTO YASUSHI
IPC分类号： H02K1/18 , H02K5/24
摘要： PURPOSE:To suppress magnetic vibration and noise of AC generator for vehicle through a simple structure. CONSTITUTION:Generator frames 10, 11 are spigot jointed and a stator core 13 is tightly fit to the inner peripheral face of one frame 10. The stator core 13 is held in place by a step part 10B made in the inner peripheral face of the frame 10 and a spigot part 11A provided on the frame 11. Grooves 17, 18 are made in the outer peripheral face of the stator core 13 and the grooves are filled with vibration damping material (silicon rubber, plastic, etc.) 16 having thermal expansion coefficient higher than that of the stator core 13. The vibration damping member 16 floats the core 13 from the frame 10 upon thermal expansion of the stator.

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