专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JPH08322176A ROTOR FOR ELECTRIC ROTATING MACHINE 失效
公开(公告)号：JPH08322176A
公开(公告)日：1996-12-03
申请号：JP13003795
申请日：1995-05-29
申请人： HITACHI LTD
发明人： MORI HIDEAKI , FUJIOKA KAZUMASA , YOKOYAMA SHINGO , TAKAYAMA KUNIHIRO , MIYAGAWA IEMICHI
IPC分类号： H02K1/32 , H02K3/24 , H02K9/08
摘要： PURPOSE: To suppress temperature rise of a rotor winding at the end part of the rotor by structure wherein cooling air flows on the surface rotor winding at the end part of rotor and discharged to the outer diametral side of the rotor. CONSTITUTION: Spacers 5, 6 having protrusions and recesses on the opposite sides thereof and a ventilation channel 10 communicating with the outer circumferential side of a rotor 2 are disposed between the windings 1 extending from the coil slot to the end part of the rotor while being spaced apart from a retaining ring 9.

12. 发明专利

JPH07131948A ROTOR OF ROTARY ELECTRIC APPARATUS 失效
公开(公告)号：JPH07131948A
公开(公告)日：1995-05-19
申请号：JP27644693
申请日：1993-11-05
申请人： HITACHI LTD
发明人： MIYAGAWA IEMICHI , MORI SHIGENOBU , YAGI YASUOMI , SHIBATA FUMIO
IPC分类号： C22C9/06 , H02K3/02 , H02K3/16 , H02K3/487
摘要： PURPOSE:To prevent breakdown by electrolytic corrosion by using an alloy of Cu, Zr, Ni and Si for the part where an eddy current of rotor flows or a wedge for preventing a rotor winding from rushing out by means of a centrifugal force. CONSTITUTION:A Cu-Zr-Ni-Si alloy is used for a wedge to prevent a rotor winding 3 from rushing out by means of a centrifugal force. This alloy ensures good conductivity, less temperature rise even if an eddy current flows, a large mechanical strength and excellent electrolytic corrosionproof characteristic. Thereby, a temperature rise at the surface of rotor can be controlled, the wedge 6, for example, is not easily deformed due to spark even if it collides with a teeth 5 and breakdown of the wedge 6 can be prevented.

13. 发明专利

JPH0723546A CURRENT COLLECTOR UNIT FOR TURBINE GENERATOR 失效
公开(公告)号：JPH0723546A
公开(公告)日：1995-01-24
申请号：JP15010793
申请日：1993-06-22
申请人： HITACHI LTD
发明人： OHARAGI HARUO , IDE KAZUMASA , OKI NORIHIRO , TAKAHASHI MIYOSHI , MIYAGAWA IEMICHI
IPC分类号： H02K11/00 , H02K13/00
摘要： PURPOSE:To provide a current collector unit for turbine generator in which the sliding characteristics of brush are improved. CONSTITUTION:The current collector for turbine generator comprises temperature and humidity detectors 11, 12 in the and humidity regulators 15, 16 in the current collector 8, an current collector 8 for a turbine generator 1, temperature outer air temperature detector 13, and an environment decision unit 17 for deciding the optimal atmosphere in the current collector 8, wherein the environment decision unit 17 decides an optimal atmosphere in the current collector 8 based on the output signals from the detectors 11, 12, 13 and then the regulators 15, 16 regulate the temperature and humidity in the current collector 8 thus preventing dew formation. This constitution forms a good film on the sliding face of a slip ring thus improving the sliding characteristics of brush.

14. 发明专利

JPH06213980A ABNORMALITY DETECTION METHOD FOR DYNAMO-ELECTRIC MACHINE 失效
公开(公告)号：JPH06213980A
公开(公告)日：1994-08-05
申请号：JP466393
申请日：1993-01-14
申请人： HITACHI LTD
发明人： MIYAGAWA IEMICHI , CHIBA YOICHIRO
IPC分类号： G01R31/34
摘要： PURPOSE:To enable instantaneously detecting abnormality of a rotor by placing a plurality of photosensors on inner periphery of a stator and always ensuring not causing electric discharge in rotor side. CONSTITUTION:On inner periphery of a dynamo stator 2, a plurality of photosensors 1 are fixed in the axial and peripheral directions of the stator 2, and signals from them are taken out of a stator duct and guided to a light intensity measuring device 4 to check whether there is abnormality on the rotor 3. By this, generation of arc flush or burning of conductor is instantaneously detected and thus a protection operation for the rotor 3 surface can be immediately executed. Furthermore, by placing a reflection plate for monitoring the peripheral position in the rotor 3 side and sensor consisting of a luminescence body and a light receiver at the bearing part, position detection of the abnormal part can be done with using the time difference between the signal of photosensor for position detection and that for abnormality detection.

15. 发明专利

JPH06186017A MONITOR FOR ARMATURE OF ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPH06186017A
公开(公告)日：1994-07-08
申请号：JP30079392
申请日：1992-11-11
申请人： HITACHI LTD
发明人： OHASHI SATORU , MIYAGAWA IEMICHI
IPC分类号： G01B17/00
摘要： PURPOSE:To provide a method for monitoring the armature of a rotary electric machine, especially confirming the adhering performance of a wedge used for the armature to a rotary shaft. CONSTITUTION:An AE sensor 8 is attached to a bearing section 7, and its signal is taken in a frequency analyzer 13 and then a thyrister start controller as a control signal 11. In addition, signals sent from a plurality of AE sensors 8 and signals obtained from a reflecting plate 9 attached to an armature 14 and an optical sensor 10 in a stationary section are taken in as time series data. Thus a confirming method for the adhering performance of a wedge used for the armature to a rotary shaft can be easily conformed.

16. 发明专利

JPH11178262A ROTOR OF ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JPH11178262A
公开(公告)日：1999-07-02
申请号：JP34101697
申请日：1997-12-11
申请人： HITACHI LTD
发明人： SENBA AKIOMI , WAKUI SHINICHI , IDE KAZUMASA , MIYAGAWA IEMICHI
IPC分类号： H02K3/487
摘要： PROBLEM TO BE SOLVED: To prevent electrolytic corrosion by providing an insulating layer between each wedge and each tooth, insulating the wedges and the teeth from each other completely, and to prevent an overcurrent from flowing between them. SOLUTION: By inserting an insulating layer 6 between each wedge 2 and each tooth 3, a construction which prevents an overcurrent from flowing in and out and electrolytic corrosion from occurring is formed. And a construction free from electrolytic corrosion is formed by making each wedge 2 itself of an insulator in addition, causing overcurrents to flow in the teeth 3, and causing them to flow into a retaining ring through a shrinkage-fitted part at the end part. Consequently, an overcurrent does not flow in and out between each wedge 2 and each end damper ring, and between wedge 2 and each tooth 3, and it is possible to prevent electrolytic corrosion caused by overcurrents induced in the rotor of a generator at the time of a thyristor start, or when higher harmonic currents flow in from a power system. Consequently, it becomes possible to enhance the endurability and reliability of the generator against its higher harmonic currents.

17. 发明专利

JPH11178260A CYLINDRICAL ROTOR OF ELECTRICALLY ROTATING MACHINE 失效
公开(公告)号：JPH11178260A
公开(公告)日：1999-07-02
申请号：JP34754297
申请日：1997-12-17
申请人： HITACHI LTD
发明人： WAKUI SHINICHI , IDE KAZUMASA , TAKAHASHI MIYOSHI , MORI SHIGENOBU , MIYAGAWA IEMICHI , YAGI YASUOMI
IPC分类号： H02K3/48
摘要： PROBLEM TO BE SOLVED: To optimize the thickness of a damper bar, so that the eddy-current loss of a rotor is not increased when a thyristor is stated. SOLUTION: When a wedge 5 is shorter than the axial length of an electrically rotating machine and a plurality of the wedges 5 are placed in one slot 2, a damper bar 4 of copper or copper alloy is installed at the lower part of the wedges 5 over the overall length of the slots 2. Both the ends of the damper bar 4 placed in each slot 2 are connected with a short-circuit ring 8 of copper alloy, and the thickness A of the damper bar 4 in the radial direction is controlled within a range of not less than 1.1 mm but not more than 2.3 mm.

18. 发明专利

JPH1023692A ROTOR FOR ELECTRIC ROTARY MACHINE 失效
公开(公告)号：JPH1023692A
公开(公告)日：1998-01-23
申请号：JP17456996
申请日：1996-07-04
申请人： HITACHI LTD
发明人： TAKAHASHI KAZUHIKO , SATO YUKINORI , IDE KAZUMASA , TAKAHASHI MIYOSHI , MIYAGAWA IEMICHI , SHIOBARA RYOICHI
IPC分类号： H02K1/12 , H02K1/22
摘要： PROBLEM TO BE SOLVED: To reduce local overheating in a stator core-end structure by placing a magnetic structure between the outside surface of the end of a field winding and the inside surface of a retaining ring, and thereby letting part of magnetic flux, produced at the end of the field winding, through the magnetic structure having a low magnetic resistance to reduce magnetic flux entering the end of a stator core. SOLUTION: A conductive sheet plate 8 is placed on the surface of the end plate 3 at the end of a stator core 1. The end of the stator core 1 is cut stepwise on its inside, and a magnetic structure 10 is placed between the outside surface of the end 6b of a rotor 5 field winding and the inside surface of a retaining ring 7. Thus part of magnetic flux ϕ produced from the field winding 6 is let through the magnetic structure 10, having a low magnetic resistance. This reduces the magnetic flux ϕ entering the end of the stator core 1 and enables the reduction of local overheating in the structure at the end of the stator core 1.

19. 发明专利

JPH09322457A ROTOR WEDGE FOR ELECTRIC ROTATING MACHINE, ITS MANUFACTURE, AND ELECTRIC ROTATING MACHINE USING IT 失效
公开(公告)号：JPH09322457A
公开(公告)日：1997-12-12
申请号：JP13467196
申请日：1996-05-29
申请人： HITACHI LTD
发明人： MIYAGAWA IEMICHI , MORI SHIGENOBU , SATO HIROSHI , YANAI YOSHIMI
IPC分类号： C22C38/00 , C22C38/58 , H02K3/487 , H02K15/02
摘要： PROBLEM TO BE SOLVED: To enhance yield strength and notch fatigue strength by constituting with austenite comprising a specified amount of carbon, nitrogen, silicon, manganese, nickel and chrome respectively. SOLUTION: A rotor wedge 13 of an electric rotating machine is constituted with carbon of 0.07 to 0.4% in weight percent, preferably 0.1 to 0.3%, nitrogen of 0.2% to 1.0%, preferably 0.2 to 0.5% silicon of less than 1%, manganese of 12 to 20%, preferably 12 to 18%, nickel of 0.3 to 5%, preferably 0.5 to 5%, chrome of 14 to 25%, preferably 14 to 20%, preferably 14 to 20% of austenite steel, preferably the remaining portion constituted with iron material. And the cleanliness related to non-metallic inclusion is less than 0.3%, grading No. of the austenite crystallinity is higher than 2, 0.2% yield strength at room temperature is more than 400MPa, specific permeability is less than 1.3, a radius of curvature at the rotor wedge shoulder corner is preferably 0.5 to 5.0mm. By those shown above, the yield strength and notch fatigue strength can be enhanced.

20. 发明专利

JPH09322454A ROTOR OF ELECTRIC ROTATING MACHINE 失效
公开(公告)号：JPH09322454A
公开(公告)日：1997-12-12
申请号：JP13845596
申请日：1996-05-31
申请人： HITACHI LTD
发明人： TAKAYAMA KUNIHIRO , SHIBATA TAKASHI , MIYAGAWA IEMICHI , MORI HIDEAKI
IPC分类号： H02K3/24 , H02K9/08
摘要： PROBLEM TO BE SOLVED: To inhibit temperature rise at a coil end portion by providing a second cooling medium gas passage for communicating with a portion having a negative pressure in the cooling medium gas passage and a portion having a positive pressure and also reducing loss due to passing of the cooling medium gas. SOLUTION: A spacer 3 is provided in axial direction and peripheral direction in a gap between coil ends 2a. The gap piece 3 comprises a coil support 3a quickening the bend of a cooling gas medium, a cooling gas medium passage 3b, a cooling gas inducing gutter 3c (a second gas passage) and a commutating gutter 3d for quickening the diffusion of a cooling gas medium. The cooling gas induction gutter 3c is a gutter for more easily pulling the cooling gas medium. By pulling in this cooling gas induction gutter 3c up to a high speed current band, the vortex flow of the cooling gas medium previously turned is pulled back to the high speed flow side, and an effect of greatly increasing the cooling area can be obtained. By doing this, the passing loss of the cooling gas medium becomes smaller and the temperature rise of at the coil end portion 2a can be inhibited.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式