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31. 发明专利

JPS57166011A PIPE FOR COOLING COIL 失效
公开(公告)号：JPS57166011A
公开(公告)日：1982-10-13
申请号：JP5065281
申请日：1981-04-06
申请人： HITACHI LTD
发明人： SATOU TAKANORI , KADOTANI KENZOU , NAGAI MATAO , TAKIZAWA TERUHIRO
IPC分类号： F16L9/00 , B32B1/08 , F16L11/00 , G21B1/11 , H01F5/00 , H01F27/28
摘要： PURPOSE:To prevent a creep voltage drop enen when water dew-condenses on the surface of a varnish layer by coating the outer surface of an insulating rubber hose flowing in or discharging a refrigerant with the varnish layer. CONSTITUTION:The whole circumference between both end flanges of the rubber section 5a and outer surface 5b of the insulating rubber hose 5 is coated with the varnish layer 7. According to such constitution, moisture dew-condenses on the surface 7a of the layer 7 due to temperature difference between the inside and outside of the hose 5 and the moisture of the outside air when operation, but moisture due to the dew condensation is interrupted by the layer 7, and does not reach the outer surface 5b of the rubber section having an impurity functioning as an ion current source. Consequently, a creep voltage does not drop due to the dew condensation, and the pipe for cooling the coil adopting the hose 5 has high reliability.

32. 发明专利

JPS56112704A ANNULAR COIL 失效
公开(公告)号：JPS56112704A
公开(公告)日：1981-09-05
申请号：JP1485180
申请日：1980-02-12
申请人： HITACHI LTD
发明人： NAGAI MATAO , KADOTANI KENZOU , SATOU TAKANORI
IPC分类号： H01F5/00 , G01R31/06 , G21B1/11
摘要： PURPOSE:To enable to perform a diagnosis with preferable detecting sensitivity by a small capacity testing power source by providing measuring electrodes in the vicinity of the inner periphery of an insulating layer to perform respective diagnoses for the insulation. CONSTITUTION:The measuring electrodes having a main electrode 14, guard electrodes 15 disposed at a slight interval at both sides of the electrodes 14 and corona shields 16 disposed at the outsides of the electrodes 15 are provided in the vicinity of the inner periphery of the earth insulating layer 7 of the annular coil 1. A main terminal 17 is connected to the electrode 14, and guard terminal 18 is connected to the electrodes 15. A coil conductor 5 is grounded via a lead wire 9, a high voltage is applied between the main terminal 17 and the guard terminal 18, and the corona and tan delta are measured for each annular coil without removing the connecting bus bar. Thus, the diagnosis with preferable detecting sensitivity can be readily performed with the testing power source of small capacity.

33. 发明专利

JPS5580217A INSULATING SPACER 失效
公开(公告)号：JPS5580217A
公开(公告)日：1980-06-17
申请号：JP15307178
申请日：1978-12-13
申请人： HITACHI LTD
发明人： NAGAI MATAO , KADOTANI KENZOU , SATOU TAKANORI
IPC分类号： H01B17/56 , H01B17/60

34. 发明专利

JPS54135996A RING COIL 失效
公开(公告)号：JPS54135996A
公开(公告)日：1979-10-22
申请号：JP4315678
申请日：1978-04-14
申请人： HITACHI LTD
发明人： NAGAI MATAO , KADOTANI KENZOU , SATOU TAKANORI
IPC分类号： H01F5/00 , G21B1/00 , G21B1/11 , H05H1/02
摘要： PURPOSE:To operate with safety by means of searching previously the abnormalness of a coil by effecting a non-destructive test on the deformation of the coil by arranging an electrode at the outer frame insulating layer of the coil body. CONSTITUTION:An electrode layer 7 is arranged at an outer frame insulated layer 6 of a coil body 2, and a coil 1 is formed by means of filling a plug 5 in an outer frame 3. When the coil is deformed during the transportation, the abnormalnes can be detected by means of changing the electrostatic capacity between a terminal 8 of the electrode layer 7 and the outer frame 3.

35. 发明专利

JPS5485303A ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPS5485303A
公开(公告)日：1979-07-06
申请号：JP15288177
申请日：1977-12-21
申请人： HITACHI LTD
发明人： KADOTANI KENZOU , SATOU TAKANORI , FUNAHATA KAZUYUKI
IPC分类号： H02K3/40
摘要： PURPOSE:To prevent the charging currents flowing through electric field attenuating layers from partially concentratedly flowing out, by filling a semiconductive material between the electric field attenuating layers near low-resistance corona shielding layers at the ends of adjacent stator windings. CONSTITUTION:The distance between the facing ends Na, Mb of the electric field attenuating layers 4a, 4b provided at the ends of the stator windings is minimized. The semiconductive material 5 is filled between the layers 4a, 4b near their parts connected with the low-resistance corona shielding layers 3a, 3b. As a result, a part i' of the charging current (i) flowing through the electric field attenuating layer 4b flows into the adjacent electric field attenuating layer 4a through the semiconductive material 5. Therefore, the charging current (i) does not concentratedly flows into the end Mb of the low-resistance corona shielding layer 3b and the Joule heat is not concentratedly generated. Thereby, the burn of the insulator layers on the windings is prevented.

36. 发明专利

JPS5450901A CORONA INHIBITING DEVICE FOR ELECTRIC WINDING 失效
公开(公告)号：JPS5450901A
公开(公告)日：1979-04-21
申请号：JP11678677
申请日：1977-09-30
申请人： HITACHI LTD
发明人： KADOTANI KENZOU , SATOU TAKANORI , FUNAHARI KAZUYUKI
IPC分类号： H02K3/40
摘要： PURPOSE:To prevent the dielectric breakdown due to the thermal destruction of the contact portion by applying a conductive coat and a field-relaxation coat onto the surface of the insulated layer at the end portion of electric winding and by providing a field-relaxation substance of a thickness more than those of the both coats at the contact point of the both coats. CONSTITUTION:Onto the surface of the insulated layer 2 above the end portion 1 of electric winding for stator, etc., the field-relaxation coat 4 having a voltage nonlinear resistance characteristic is applied from the inside of slot to the end side of winding and the conductive coat 3 is applied from the inside of slot to the outside. And, at the end portions opposing to each other at the contact portion of the both coats, the field-relaxation substance 5 of a thickness more than those, t1, of the both coats is provided. The field-relaxation substance is made up by impregnating a SiC-mixed varnish into a porous insulating base material. Thus, the area of the receiving face 5F for conductive coat of charged current flowing in the field-relaxation coat becomes greater, so that the concentration of electric field at the end 3E of conductive coat is suppressed, and thus dielectric breakdown due to local heat build-up, etc., can be prevented.

37. 发明专利

JPS545564A COIL INSULATING TREATMENT 失效
公开(公告)号：JPS545564A
公开(公告)日：1979-01-17
申请号：JP6987077
申请日：1977-06-15
申请人： HITACHI LTD
发明人： SATOU TAKANORI , KADOTANI KENZOU , NAGAI MATAO
IPC分类号： H01F5/06 , H01F41/12 , H02K3/30 , H02K15/12

38. 发明专利

JPS545563A RING TYPE COIL 失效
公开(公告)号：JPS545563A
公开(公告)日：1979-01-17
申请号：JP6986977
申请日：1977-06-15
申请人： HITACHI LTD
发明人： NAGAI MATAO , KADOTANI KENZOU , SATOU TAKANORI , AKI FUMITAKE , YAMAGIWA TAKESHI
IPC分类号： H01F41/12 , B65H81/04

39. 发明专利

JPS53131500A INSULATING TAPE 失效
公开(公告)号：JPS53131500A
公开(公告)日：1978-11-16
申请号：JP4579177
申请日：1977-04-22
申请人： HITACHI LTD
发明人： KADOTANI KENZOU , SATOU TAKANORI , NAGAI MATAO
IPC分类号： H01B17/56 , H01B17/60
摘要： PURPOSE:To improve a contact on a bend and to improve an insulation at a bend by inserting a thin insulator into a flat woven tube with glass fibers to compose an insulation tape.

40. 发明专利

JPS52102669A CATHODEERAY TUBE AND MANUFACTURING METHOD FOR SAME 失效
公开(公告)号：JPS52102669A
公开(公告)日：1977-08-29
申请号：JP1891976
申请日：1976-02-25
申请人： HITACHI LTD
发明人： SATOU TAKANORI , OKABE SHIGERU
IPC分类号： H01J29/02 , H01J29/88
摘要： PURPOSE:To increase withstand voltage and obtain good quality picture by increasing adhesion of conductive film and to improve the efficiency of production by decreasing substandard products.

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