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1. 发明专利

JPH10290556A SQUIRREL-CAGE ROTOR 失效
公开(公告)号：JPH10290556A
公开(公告)日：1998-10-27
申请号：JP9557297
申请日：1997-04-14
申请人： HITACHI LTD
发明人： KIKUCHI SATOSHI , OHARAGI HARUO , ARAI KEIJI , MIKAMI HIROYUKI , TAKAHASHI MIYOSHI , SENOO MASAHARU , SATO KAZUO
IPC分类号： H02K1/22 , H02K15/16 , H02K17/16
摘要： PROBLEM TO BE SOLVED: To provide a balance weight easily without requiring any independent unit by setting at least one copper bar of a rotor longer than other copper bars and subjecting the copper bar to aluminum diecasting. SOLUTION: A rotor 1 comprises a rotor core 4 having full-open slots 3 carried on a shaft 2, and secondary conductors formed by inserting a copper bar 5 and a copper bar 6 comprising copper bars 6a, 6b, 6c into full-open slots 3 and coupling the copper pars with an end ring 7 by aluminum diecast. The copper bar 6 (6A, 6B, 6C) is longer than the copper bar 5 in the axial direction. Since a copper bar having a high mass is located at a part of the rotor 1 in the circumferential direction, same effect as providing a balance weight at an end of the rotor 1 is attained. In other words, the work for providing a new balance weight can be eliminated and a balance weight can be provided easily without requiring any independent fixing jig or unit.

2. 发明专利

JPH0522885A MAGNETIC WEDGE FOR ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPH0522885A
公开(公告)日：1993-01-29
申请号：JP16668591
申请日：1991-07-08
申请人： HITACHI LTD
发明人： MIKAMI HIROYUKI , ARAI KEIJI , TAKAHASHI MIYOSHI , KAJIWARA KENZO
IPC分类号： H02K3/493
摘要： PURPOSE:To provide a magnetic wedge which can smooth a pulsation generated in a circumferential magnetic flux distribution on the surface of a core, reduce a leakage magnetic flux simultaneously flowing to adjacent slot teeth from slot teeth and contribute to improvements in characteristics such as a high efficiency of a rotary electric machine in the improvement in the wedge to be used for the machine. CONSTITUTION:A magnetic material layer 5a of a magnetic wedge 5 is composed of a plastic material in which magnetic materials of fine magnetic wires 5c, etc., are laminated as a base material. After the layer 5a is disposed in an opening of a nonmagnetic material layer 5b having a sectional shape of H of an alphabet, disposed laterally so that the structure of the wedge 5 corresponding to the vicinity of the central position of the slot opening 2a is formed of a nonmagnetic material when the wedge 5 is mounted in the opening 2a, it is so integrally molded as to match the shape of the opening 2a.

3. 发明专利

JPS6489935A ROTOR OF ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPS6489935A
公开(公告)日：1989-04-05
申请号：JP24379087
申请日：1987-09-30
申请人： HITACHI LTD
发明人： TAKAHASHI MIYOSHI , WATABE MASATOSHI , ARAI KEIJI , ARAKAWA SHINJI
IPC分类号： H02K3/487
摘要： PURPOSE:To obtain a rotor provided with high load proof stress causing no generation of local temperature rise by placing a conductive wedge having an integral construction longitudinally in a rotor surface core groove section, short circuiting the end section of each conductive wedge electrically and converting a wedge section into a magnetic anisotropic constitution with magnetic permeability bigger than other direction in the radius direction of a rotor section. CONSTITUTION:In the time of a sudden change of load or non-synchronism, induced current (i) flows to a rotor 1 by the relative velocity difference between number of revolutions of a rotor and magnetomotive force of a stator, but most part of induced current flows to a good conductive wedge 4 placed on the surface of the rotor 1 so that radiation effect on the surface of the rotor 1 is increased together with improvement of damping effect, and the temperature rise of the rotor 1 is suppressed. While, ferromagnetic substance fillers 10 extended radially or in all directions are scattered on a wedge section so that skin effect, what is called, that the induced current (i) is concentrated onto the outer surface of the wedge 4 is reduced, and the temperature rises of the wedge 4 itself can be suppressed.

4. 发明专利

JPS617531B2 JPS617531B2 - 失效
公开(公告)号：JPS617531B2
公开(公告)日：1986-03-07
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
CPC分类号： F16C32/0431

5. 发明专利

JPS612809B2 JPS612809B2 - 失效
公开(公告)号：JPS612809B2
公开(公告)日：1986-01-28
申请号：JP17322480
申请日：1980-12-10
申请人： Hitachi Ltd
发明人： ABUKAWA TOSHIMI , ARAI KEIJI , TAKAHASHI NORYOSHI , OKUDA HIROSHI
IPC分类号： F16C32/04
CPC分类号： F16C32/0425 , F16C32/041 , F16C32/0417

6. 发明专利

JPS58204798A Power factor compensator at plural ac motor operation time 失效
标题翻译：功率因数补偿器在一次交流电动机的运行时间
公开(公告)号：JPS58204798A
公开(公告)日：1983-11-29
申请号：JP8482282
申请日：1982-05-21
申请人： Hitachi Ltd
发明人： ARAI KEIJI , ABUKAWA TOSHIMI , TAKAHASHI NORIYOSHI , ORITO YASUSHI
IPC分类号： H02P5/74 , H02P7/74
CPC分类号： H02P5/74
摘要： PURPOSE:To reduce the power source capacity by driving a plurality of AC motors provided with a power factor compensating capacitor individually from the high frequency power source of a constant voltage and constant frequency, thereby enabling to compensate the power factor at acceleration time and operating time. CONSTITUTION:Many AC motors of reltively small capacity for driving a load having large inertia are operated in parallel by a high frequency power source, an AC motor 4 provided with a power factor compensating capacitor 8 is connected in parallel with a constant voltage and constant frequency power source 1. Accordingly, since the capacitor 8 is connected always to the motor 4, the power factor can be compensated for both accelerating time and rated operation time, the capacity of the power source can be reduced by reducing the supply power, and further since a variable voltage and variable frequency power source is not used for the power source 1, the structure can be simplified to improve the economy.
摘要翻译：目的：通过驱动设置有功率因数补偿电容器的多个交流电机，从恒定电压和恒定频率的高频电源单独驱动，从而能够补偿加速时间和运行时间内的功率因数，从而降低电源容量。构成：用于驱动具有大惯量的负载的相当小容量的许多AC电动机由高频电源并联操作，设置有功率因数补偿电容器8的AC电动机4与恒定电压和恒定频率并联连接电源1.因此，由于电容器8总是与电动机4连接，所以可以在加速时间和额定运行时间两者中补偿功率因数，能够通过降低供电能力来降低电源的容量，由于电源1不使用可变电压和可变频率电源，因此可以简化结构以提高经济性。

7. 发明专利

JPS5362051A MAGNETIC BEARING 失效
公开(公告)号：JPS5362051A
公开(公告)日：1978-06-03
申请号：JP13726576
申请日：1976-11-17
申请人： HITACHI LTD
发明人： ARAI KEIJI , ABUKAWA TOSHIMI , OKUDA HIROSHI
IPC分类号： F16C32/04
摘要： PURPOSE:Positioning of a polar piece of a magnetic material over a part of a circle and upward at the lateral bulkhead part of electroconductive materials of nonmagnetic material facilitates to enlarge vibration control effect by measures of eddy current together with allowing compatibility of geometric center with magnetic center.

8. 发明专利

JPS5341705A ELECTRIC GENERATOR 失效
公开(公告)号：JPS5341705A
公开(公告)日：1978-04-15
申请号：JP11578976
申请日：1976-09-29
申请人： HITACHI LTD
发明人： ARAI KEIJI , OKUDA HIROSHI , WATANABE MASATOSHI , TAKAHASHI NORIYOSHI
IPC分类号： H02K1/18 , H02K1/12 , H02K1/30 , H02K5/00 , H02K5/24 , H02K19/16
摘要： PURPOSE:To reduce impulsive twisting torque in the rotary shaft caused by quick varying load, with such construction as to enable the stator core to shift in the direction of rotation.

9. 发明专利

JPS536754A MAGNETIC BEARING 失效
公开(公告)号：JPS536754A
公开(公告)日：1978-01-21
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
摘要： PURPOSE:To obtain greater damping force and centripetal force by providing grooves on rotor teeth to concentrate leakage magnetic flux to the teeth and to make magnetic concentration larger.

10. 发明专利

JPS5226408A HYSTERESIS MOTOR 失效
公开(公告)号：JPS5226408A
公开(公告)日：1977-02-28
申请号：JP10216575
申请日：1975-08-25
申请人： HITACHI LTD
发明人： MIYASHITA KUNIO , SUGIURA YASUYUKI , OKUDA HIROSHI , ARAI KEIJI
IPC分类号： H02K19/08
摘要： PURPOSE:The hysteresis torque is increased with the process of facilitating the magnetic flux of the stator to flow almost along the peripheral part of the disc-shaped rotor by producing the magnetic saturation except the position of the disc-shaped rotor opposite to the stator.

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