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41. 发明专利

JPS5243915A ELECTRIC MOTOR WHICH HAS CLEARANCE IN SHAFT DIRCTION 失效
公开(公告)号：JPS5243915A
公开(公告)日：1977-04-06
申请号：JP11978875
申请日：1975-10-06
申请人： HITACHI LTD
发明人： MIYASHITA KUNIO , SUGIURA YASUYUKI , OKUDA HIROSHI , ARAI KEIJI
IPC分类号： H02K7/16 , H02K17/12 , H02K19/08
摘要： PURPOSE:Electric motor which has clearance in shaft direction in which stabilizing power in radius direction is formed as nearly equal state in each phase, is obtaned.

42. 发明专利

JPS5199752A 失效
公开(公告)号：JPS5199752A
公开(公告)日：1976-09-02
申请号：JP2394575
申请日：1975-02-28
申请人： HITACHI LTD
发明人： OKUDA HIROSHI , ARAI KEIJI
IPC分类号： F16C32/04 , F16C39/00 , F16C39/06

43. 发明专利

JPH10234166A ROTOR FOR INDUCTION MOTOR 失效
公开(公告)号：JPH10234166A
公开(公告)日：1998-09-02
申请号：JP3463597
申请日：1997-02-19
申请人： HITACHI LTD
发明人： OHARAGI HARUO , KIKUCHI SATOSHI , MIKAMI HIROYUKI , TAKAHASHI MIYOSHI , ARAI KEIJI , SENOO MASAHARU , SATO KAZUO
IPC分类号： H02K17/16 , H02K15/02
摘要： PROBLEM TO BE SOLVED: To obtain a rotor for induction motor, having low secondary resistance and good characteristics by coupling a bind bar, in which copper and aluminum are bonded through a reactive layer, with an end ring through aluminum diecast to form a secondary conductor, thereby surely bonding copper and aluminum. SOLUTION: End rings 9 are formed at the opposite ends of a squirrel-cage rotor 5, comprising a rotor core 6 fixed with a central shaft 8 and having slots 7 in which bind bars 1 of secondary conductor, are formed. The bind bar 1 is made of a copper 2 in the shape of the slot 7 which is applied with an aluminum coating 3, and a reaction layer 4 to the copper 2 is formed on the inner circumferential surface of the aluminum coating 3. The end ring 9 is formed by an aluminum diecast, while setting the bind bar 1 in the slot 7. According to the structure, the copper 2 and the aluminum coating 3 can be bonded firmly.

44. 发明专利

JPH10164780A ROTATING ELECTRIC MACHINE AND ITS STATOR 失效
公开(公告)号：JPH10164780A
公开(公告)日：1998-06-19
申请号：JP31905196
申请日：1996-11-29
申请人： HITACHI LTD
发明人： MIKAMI HIROYUKI , OHARAGI HARUO , ARAI KEIJI , KIKUCHI SATOSHI , TAKAHASHI MIYOSHI , SENOO MASAHARU
IPC分类号： H02K1/16 , H02K17/12
摘要： PROBLEM TO BE SOLVED: To equalize the maximum magnetic density of the iron core part of a stator even after setup or according to the design specification or machine kind, by equipping a rotating-electric machine with a casing which possesses a bearing for housing a stator and a rotor counterposed through a gap on its periphery side and supporting the rotor. SOLUTION: A stator 1 is equipped with an iron core 2 which has iron core teeth 7 among plural slots 3 to accommodate windings 4. The teeth of an iron core lying among the slots 3 equal in phase of the current applied to each of the windings 4 within adjacent slots 3 are made 7a, and the teeth lying among the slots different in phase of the current are made 7b, and magnetic material 8 is installed at the tooth 7b, consequently the sectional area of the tooth 7b increases, and the maximum magnetic flux density drops, and the maximum magnetic flux density in the peripheral direction of the iron core tooth 7 is made roughly equal. The distribution of the iron loss of the tooth 7b is made roughly equal in the circumferential direction of the iron core tooth 7, whereby the cooling effect by ventilation is improved and the partial temperature rise within the machine can be suppressed, and the downsizing of the machine size, the improvement of the motor property, and the reduction of vibration and noise can be achieved.

45. 发明专利

JPH09182396A ROTOR OF INDUCTION MOTOR 失效
公开(公告)号：JPH09182396A
公开(公告)日：1997-07-11
申请号：JP34030495
申请日：1995-12-27
申请人： HITACHI LTD
发明人： MIKAMI HIROYUKI , OHARAGI HARUO , ARAI KEIJI , TAKAHASHI MIYOSHI , KAJIWARA KENZO , MARUYAMA SHOICHI , ITO MOTOYA
IPC分类号： H02K17/16 , H02K5/24
摘要： PROBLEM TO BE SOLVED: To provide the rotor of a high-performance induction motor which can enhance a power factor and reduce noise and a stray loss. SOLUTION: A conductive material is injected into a plurality of slots 3 provided in an iron core 2 of forming a rotor 1 to constitute a rotor bar 4. After that, a slot opening part 8 is provided in the respective slots 3 by machining. In the induction motor having a nominal output of 40kW to 60kW, the width (w) of the slot opening part 8 is set in the range of 1.0mm to 2.0mm and its height (h) is set in the range of 1.0mm to 2.5mm.

46. 发明专利

JPH0446063B2 失效
公开(公告)号：JPH0446063B2
公开(公告)日：1992-07-28
申请号：JP10462486
申请日：1986-05-09
申请人： HITACHI LTD
发明人： WATABE MASATOSHI , TAKAHASHI MYOSHI , SATO YUKINORI , ITO MOTOYA , ARAI KEIJI
IPC分类号： H02K3/493

47. 发明专利

JPS5847570B2 JPS5847570B2 - 失效
公开(公告)号：JPS5847570B2
公开(公告)日：1983-10-24
申请号：JP7988576
申请日：1976-07-07
申请人： Hitachi Ltd
发明人： ABUKAWA TOSHIMI , OKUDA HIROSHI , ARAI KEIJI
IPC分类号： F16C32/04
CPC分类号： F16C32/0414

48. 发明专利

JPS5765413A Magnetic bearing 失效
标题翻译：磁性轴承
公开(公告)号：JPS5765413A
公开(公告)日：1982-04-21
申请号：JP13764680
申请日：1980-10-03
申请人： Hitachi Ltd
发明人： ABUKAWA TOSHIMI , TAKAHASHI NORIYOSHI , ARAI KEIJI
IPC分类号： F16C32/04
CPC分类号： F16C32/0414
摘要： PURPOSE: To heighten the vibration supporessing effect of an eddy-current-type vibration suppressor on a magnetic bearing, by making different the widths of opposed protrusions of both a rotor and secured rings to increase the quantity of magnetic flux which extends through the protrusions of a nonmagnetic electroconductive member which surround those of the rotor.
CONSTITUTION: A rotary shaft 1 is fitted with a yoke 2 for a magnetic bearing. A nonmagnetic electroconductive member 3 is placed to surround rotor protrusions 2a, 2b. An outer and an inner secured rings 4, 5 are inserted into the electroconductive member 3 and opposed to the rotor protrusions 2a, 2b. The widths W
1 , W
2 of the rotor protrusions 2a, 2b are made smaller than those W
2 ', W
1 ' of the secured rings 4, 5 so that the magnetic flux 7 of a permanent magnet 6 extends from the end face of the secured ring 5' to the rotor protrusion 2a through the protrusions 3a, 3b of the electroconductive member 3. According to this constitution, the quantity of the magnetic flux which extends through the protrusions 3a, 3b is increased to heighten the effect for vibration suppression.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：为了提高涡流式振动抑制器对磁轴承的振动抑制效果，通过使转子和固定环的相对突起的宽度不同，增加延伸穿过突出部的突起的磁通量围绕转子的非磁性导电构件。构成：旋转轴1配有用于磁轴承的磁轭2。放置非磁性导电构件3以包围转子突起2a，2b。外部和内部固定环4,5插入到导电构件3中并与转子突起2a，2b相对。使转子突起2a，2b的宽度W1，W2小于固定环4,5的W2'，W1'，使得永磁体6的磁通量7从固定环5的端面延伸通过导电构件3的突起3a，3b向转子突起2a延伸。根据该结构，通过突起3a，3b延伸的磁通量增加，以提高振动抑制的效果。

49. 发明专利

JPS55152916A MAGNETIC BEARING 失效
公开(公告)号：JPS55152916A
公开(公告)日：1980-11-28
申请号：JP5916079
申请日：1979-05-16
申请人： HITACHI LTD
发明人： ABUKAWA TOSHIMI , ARAI KEIJI , OKUDA HIROSHI
IPC分类号： F16C32/04
摘要： PURPOSE:To get a magnetic bearing which is casy to assemble and large in radial spring constant, by configuring a series of magnets, n in number, opposed through a gap to another series of magnets, n+1 in number, which are being set in the radial direction, different in diameter and magnetized in the axial or radial direction on the contrary. CONSTITUTION:A magnetic bearing is equipped with a supporting plate 2 with which a rotational unit is connected, magnet 3 on the rotary side, guard ring 4, magnet 5a on the rotational side, fitting plate 6b, etc. A magnet 5c, which is polarized in the same axial direction as the magnet 5a and different in diameter from the magnets 5a, 3, is set inside in the radial direction on the same plane with the magnet 5a. The magnetic bearing of this configuration is suitable for high revolution, easy to assemble and improved in anti-vibration performance with an increased radial spring constant.

50. 发明专利

JPS5586360A HYSTERESIS MOTOR 失效
公开(公告)号：JPS5586360A
公开(公告)日：1980-06-30
申请号：JP15858778
申请日：1978-12-25
申请人： HITACHI LTD
发明人： ABUKAWA TOSHIMI , ARAI KEIJI , OKUDA HIROSHI
IPC分类号： H02K19/08
摘要： PURPOSE:To obtain a hysteresis motor wherein abnormal operation can be readily sensed from the variation in an input current by providing a ferrite core, whose magnetic-flux density decreases due to temperature rise, on the surface of a stator core opposing a rotor. CONSTITUTION:A stator core 2 is arranged so as to oppose a rotor 4 comprising a semi-rigid magnetic material, and, for example, ferrite cores 9 are provided on teeth 8 forming winding grooves 7 so as to oppose the rotor 4. The magnetic flux density of the ferrite core decreases with the rise of the temperature. In this constitution, since the temperature of the ferrite core 9 increases due to the high-frequency heating phenomenon of the rotor 4 at the time of detuned operation of the motor, the magnetism of the ferrite core 9 decreases, and the gap distance is equivalently increased. And, since the excitation reactance of the motor is decreased by the increase in the gap distance, an input current to the motor increases. By sensing the variation in the input current to the motor, abnormal operation can be detected.

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