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31. 发明专利

JPH0833251A TURBINE GENERATOR 失效
公开(公告)号：JPH0833251A
公开(公告)日：1996-02-02
申请号：JP16219694
申请日：1994-07-14
申请人： HITACHI LTD
发明人： WAKUI SHINICHI , IDE KAZUMASA , OHARAGI HARUO , TAKAHASHI MIYOSHI , MIYAGAWA IEMICHI , YAGI YASUOMI
IPC分类号： H02K3/16 , H02K3/487 , H02K19/26
摘要： PURPOSE:To enhance harmonic resistance significantly by decreasing the resistance of the damper winding in a rotor gradually from the d-axis side toward the q-axis side of each wedge and limiting the resistance quantitatively. CONSTITUTION:An eddy current larger than that on the pole side is induced on the inter-pole side of a rotor at the time of starting. The number of slots per pole is set at 2K (K: integer) for the rotor and each slot is numbered sequentially starting from first slot closest to the d-axis side toward the q-axis side. Assuming the resistance of a wedge inserted into the first rotor slot is RD1, the resistance of n-th (z

32. 发明专利

JPH07222496A METHOD FOR STARTING TURBINE GENERATOR USING THYRISTOR POWER SOURCE 失效
公开(公告)号：JPH07222496A
公开(公告)日：1995-08-18
申请号：JP1146394
申请日：1994-02-03
申请人： HITACHI LTD
发明人： IDE KAZUMASA , WAKUI SHINICHI , OHARAGI HARUO , TAKAHASHI MIYOSHI , MIYAGAWA IEMICHI , YAGI YASUOMI
IPC分类号： F01D19/00 , F02C9/00 , H02P1/52 , H02P9/00 , H02P9/08
摘要： PURPOSE:To stably raise a low speed range to the vicinity of a synchronizing speed by monitoring a pulsation torque generated at the time of starting a turbine generator using a thyristor power source. CONSTITUTION:A torque detector 30 of a turbine generator 1, an armature current detector 20 and a field current detector 24, and an arithmetic unit 5 for calculating necessity or not of an acceleration/deceleration command of the generator by deciding presence or absence of generation of a shaft twisting of the generator 1 from an output signal of the detector 30, an output signal of the detector 20 and an output signal of the detector 24 are provided, and the command is applied to the generator in response to an output signal of the unit 5.

33. 发明专利

JPH0767279A TURBINE GENERATOR 失效
公开(公告)号：JPH0767279A
公开(公告)日：1995-03-10
申请号：JP13533594
申请日：1994-06-17
申请人： HITACHI LTD
发明人： WAKUI SHINICHI , IDE KAZUMASA , OHARAGI HARUO , TAKAHASHI MIYOSHI , MIYAGAWA IEMICHI , YAGI YASUOMI
IPC分类号： H02K1/26 , H02K3/16 , H02K3/487 , H02K19/16
摘要： PURPOSE:To realize significant shortening of starting time by thermally balancing respective parts of the rotor of generator at the time of starting a thyristor. CONSTITUTION:The stator 2 of a turbine generator is provided with slots 3 for inserting a field winding, a wedge 4 for holding the field winding on the pole side of the rotor 2, and a wedge 5 on the interpole side of the rotor 2. At the time of starting a thyristor, the higher harmonic magnetomotive force causing temperature rise of the rotor 2 or torque ripple forms an elliptical rotating field having long diameter on the d-axis and short diameter on the q-axis. Since higher eddy current is induced on the q-axis of the rotor 2 than on the d-axis, the radial thickness d' of the wedge 5 on the interpole side of the rotor 2 is set thicker than that (d) of the wedge 4 on the pole side thus decreasing the resistance of the wedge 5.

34. 发明专利

JPH06185311A SPEED CONTROL OF POWER GENERATING FACILITY 失效
公开(公告)号：JPH06185311A
公开(公告)日：1994-07-05
申请号：JP33578792
申请日：1992-12-16
申请人： HITACHI LTD
发明人： MIYAGAWA IEMICHI , NAKANISHI KAZUHIRO
IPC分类号： F01K23/16 , F02C7/275 , F02C7/30 , F02C7/36
摘要： PURPOSE:To freely set revolving speed by way of avoiding characteristic frequency by controlling speed of a rotation axis under an electric control method by a frequency converter in a combined cycle power generating facility. CONSTITUTION:In a combined cycle power generating facility, a generator 4 is arranged between a gas turbine 3 and a steam turbine 5. To an armature winging of the generator 4 connected to a shaft, a thyristor frequency converter 6 is connected. By driving the generator 4 as an electric motor by an electric current from the frequency converter 6, required frequency is acquired. A thyristor starting method is an electric control method by the frequency converter 6. This method is excellent in a control follow-up property, and it is possible to convert revolving speed. Additionally, when it is generally apart from characteristic frequency by more than 0.2Hz, an oscillation level of resonance becomes sufficiently small. Consequently, in the case of avoiding the characteristic frequency by way of changing the revolving speed, if amplitude of the change is made to be more than 0.2Hz, it is possible to freely select the revolving speed.

35. 发明专利

JP2000287392A TWO-POLE TURBINE GENERATOR AND ITS ROTOR 失效
公开(公告)号：JP2000287392A
公开(公告)日：2000-10-13
申请号：JP2000081730
申请日：2000-03-17
申请人： HITACHI LTD
发明人： IDE KAZUMASA , TAKAHASHI MIYOSHI , TAKAHASHI KAZUHIKO , OHARAGI HARUO , WAKUI SHINICHI , MIYAGAWA IEMICHI , YAGI YASUOMI
IPC分类号： H02K1/26 , H02K3/48
摘要： PROBLEM TO BE SOLVED: To obtain a two-pole turbine generator and its rotor which can improve the quality of supplied electric power by decreasing wave form distorting rate under a load and can reduce a required field current under the load. SOLUTION: This rotor is provided with a lump rotor core having magnetic pole parts 6 and teeth 8 other than the magnetic pole parts 6 formed between slots for inserting windings, field windings inserted inside the slots 7 for inserting the windings, and wedges 10 for holding the field windings. The rotor is structured in such a way as to satisfy either relation of 65 deg.

36. 发明专利

JP2000134846A ROTOR OF ELECTRIC ROTATING MACHINE 失效
公开(公告)号：JP2000134846A
公开(公告)日：2000-05-12
申请号：JP29781198
申请日：1998-10-20
申请人： HITACHI LTD
发明人： MIYAGAWA MAKOTO , IDE KAZUMASA , WAKUI SHINICHI , MIYAGAWA IEMICHI
IPC分类号： H02K3/487
摘要： PROBLEM TO BE SOLVED: To suppress galvanic corrosion and at the same time improve resistance against the harmonic current of a generator and reliability by adopting a wedge and an end damper ring and hence adjusting the gap between the wedge and the end damper ring and between the wedge and teeth. SOLUTION: A wedge 3 that is inserted between teeth 4 is divided into short length considering assembly working efficiency or thermal inflation. A damper for suppressing an induction current is inserted between the wedge 3 and a field coil 2 and they are short-circuited each other by an end damper ring 6 at an end part. Also, the field coil 2 and the end damper ring 6 are protected rigidly by a retaining ring 7 so that they are not damaged by centrifugal force in rotation at the end part, thus increasing the thickness of the end damper ring 6 and improving resistance against galvanic corrosion between the wedge at the end part and the end damper ring 6 and between the teeth 4 and the wedge at the end part and at the same time improving reliability.

37. 发明专利

JPH1198745A CYLINDRICAL ROTOR OF ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPH1198745A
公开(公告)日：1999-04-09
申请号：JP25468297
申请日：1997-09-19
申请人： HITACHI LTD
发明人： WAKUI SHINICHI , IDE KAZUMASA , TAKAHASHI KAZUHIKO , TAKAHASHI MIYOSHI , MORI SHIGENOBU , MIYAGAWA IEMICHI , YAGI YASUOMI
IPC分类号： H02K1/06 , H02K1/26 , H02K3/487 , H02K11/00
摘要： PROBLEM TO BE SOLVED: To control generation of local fused damage to a rotor to enhance reliability, by forming with copper alloy a plurality of wedges for holding, within a slot, a field coil accommodated within a slot of the cylindrical rotor iron core. SOLUTION: A cylindrical rotor 1 a two pole machine and is provided with radial slots in the iron core portion, and accommodates a field coil 3 within the slot 2. Wedge of cylindrical rotor 1 is formed of a copper alloy. The copper alloy wedge 5 fixes the field coil 3 in such a manner that the field coil 3 is never popped out from the slot 2 during operation. A damper bar 4 is provided between the field coil 3 and the copper alloy wedge 5. The damper bar 4 is connected to a terminating ring. A holding ring is also provided to hold the end portion of the field coil 3. As a result, even if arc is generated between the teeth 6 and copper alloy wedge 5 when an eddy current creeps to the damper bar 4 or teeth 6 from the copper alloy wedge 5, good electrical corrosion proof can be assured, and fused damage to the copper alloy wedge 5 can be prevented.

38. 发明专利

JPH10150737A ROTOR FOR ELECTRIC ROTATING MACHINE 失效
公开(公告)号：JPH10150737A
公开(公告)日：1998-06-02
申请号：JP30641196
申请日：1996-11-18
申请人： HITACHI LTD
发明人： NUMATA SEIJI , HATTORI KENICHI , SHIBATA MASAYUKI , SHIOBARA RYOICHI , MIYAGAWA IEMICHI , ISHIHARA ATSUSHI , SHIBUYA TADAAKI
IPC分类号： H02K3/24 , H02K9/08
摘要： PROBLEM TO BE SOLVED: To increase the output of an electric rotating machine while reducing the cost without increasing the cross-sectional area of coil conductor by suppressing temperature rise at the end part of field winding. SOLUTION: The rotor 1 comprises a plurality of saddle type coils 4 wound around a rotor core, and a core ties 6 wherein a vent 8 having rectangular opening and sectral cross-section in the axial direction of the rotor is made at the end 10 of each core ties between coil slots 5. Spacers 19, 20 having grooves 22, 23 for passing refrigerant gas are inserted between the saddle type coils 4 at the end part 18 of field winding. The grooves of the spacers 19, 20 communicate with a ventilation chamber 24 and the vent 8 and the end part 18 of field winding is cooled by feeding the refrigerant gas through the passages.

39. 发明专利

JPH1042522A ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JPH1042522A
公开(公告)日：1998-02-13
申请号：JP19176896
申请日：1996-07-22
申请人： HITACHI LTD
发明人： ISHIHARA ATSUSHI , MIYAGAWA IEMICHI , MORI HIDEAKI
IPC分类号： H02K9/06
摘要： PROBLEM TO BE SOLVED: To raise the cooling efficiency of a rotating electric machine and to reduce the machine size by arranging twisting fans as cooling fans in the end windings of the armature windings protruding from the end parts of the stator core, and arranging air guides on the side nearer to the axial-direction center than the fans. SOLUTION: Twisting fans 6 for circulating cooling winds for cooling a stator 1 and the rotor 4 are provided on both sides of a part where field windings 5b are put. In the peripheral parts of the twisting fans 6, air guides 7 for guiding cooling winds to the fans 6 are provided. Cooling winds 8 guided along the air guides 7 from the outside of the stator 1 are exhausted to the axial-direction inside by the twisting fans 6, and flow into the end parts 5a of the field windings and an air gap 11. The cooling winds 8, caused to flow into the end parts 5a of the field windings pass the ventilating routes of the field windings 5b from the rotor 1 body, are exhausted to the air gap 11, pass the air ducts 9 of the stator core 2 and are guided to the outside of the stator 1.

40. 发明专利

JPH09215247A ROTOR OF ELECTRIC ROTARY MACHINE 失效
公开(公告)号：JPH09215247A
公开(公告)日：1997-08-15
申请号：JP30268896
申请日：1996-11-14
申请人： HITACHI LTD
发明人： ISHIHARA ATSUSHI , MIYAGAWA IEMICHI , IDE KAZUMASA , MORI SHIGENOBU
IPC分类号： H02K1/02 , H02K1/26 , H02K3/487
摘要： PROBLEM TO BE SOLVED: To prevent electro-corrosion and improve yield strength and reliability against a higher harmonic current by forming a wedge located at an end portion in axial direction of a rotor with an alloy of Cu, Zr, Ni and Si and forming the other with an aluminum alloy or iron alloy. SOLUTION: A wedge 3 for holding a field winding 11 inside a slot is attached at the outer peripheral side of a slot of a rotor core 10. Also, the wedge 3 is mounted by dividing it in the axial direction, an end wedge 3a located at the end portion in axial direction is formed with an alloy of Cu, Zr, Ni, and Si, and wedges in other portions are formed with aluminum alloy or iron alloy. An eddy current induced to a rotor mainly flows to an end damper ring 4 through an end wedge 3a at the end portion in axial direction. But a copper alloy wedge 3a having a high corrosion resistance is used for the end portion of the rotor, so that electro-corrosion is hardly produced. Also by forming wedge 3 for other portions with an aluminum alloy or an iron alloy, the yield strength and reliability against higher harmonic current can be improved.

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