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31. 发明专利

JP2000103260A AC FEEDING SWITCHING NO-VOLTAGE TIME MEASURING DEVICE 失效
公开(公告)号：JP2000103260A
公开(公告)日：2000-04-11
申请号：JP27563898
申请日：1998-09-29
申请人： RAILWAY TECHNICAL RES INST
发明人： KAWAHARA TAKAHARU , HISAMIZU TAIJI , MOCHINAGA YOSHIFUMI
IPC分类号： B60M1/28 , B60M3/00 , B60M3/04
摘要： PROBLEM TO BE SOLVED: To automatically and accurately measure switching no-voltage time of an AC feeding switching place on the ground every time when a vehicle normally passes. SOLUTION: In this device, an A current transformer 1 and a B current transformer 2 are respectively arranged in series to an A diverter switch 18 and a B diverter switch 19, and the logical product of electric current OFF detection of the A current transformer 1 and an opening command signal AO to the A diverter switch 18 outputted from an electric rolling stock position detecting track circuit 37 is taken by a start circuit 3 to use this as a start signal. While, the logical product of the electric current ON detection of the B current transformer 2 and a closing command signal BC to the B diverter switch 19 outputted from the track circuit 37 is taken by a stop circuit 4 to use this as a stop signal so that time up to the stop signal from the start signal is measured as switching no-voltage time by a timer circuit 5.

32. 发明专利

JPH115950A SILICONE COMPOSITION FOR CERAMIC INSULATOR COATING 失效
公开(公告)号：JPH115950A
公开(公告)日：1999-01-12
申请号：JP17757497
申请日：1997-06-18
申请人： RAILWAY TECHNICAL RES INST , SHINETSU CHEMICAL CO
发明人： MOCHINAGA YOSHIFUMI , AGUI KOJI , ENARI TAKAFUMI , TANAKA SANEYUKI
IPC分类号： C09D183/05 , C09D183/07 , H01B3/46 , H01B17/50
摘要： PROBLEM TO BE SOLVED: To provide a novel silicone compsn. for a ceramic insulator coating that can yield a coating excellent in the effect of inhibiting leakage current and having high durability. SOLUTION: This silicone compsn. for a ceramic insulator coating comprises: (A) 50 pts. dimethylpolysiloxane, with both ends of the molecule chain being blocked with a dimethylvinylsiloxy group, which is represented, e.g. by formula CH2 =CH(CH3 )2 SiO[(CH3 )2 SiO]450 Si(CH3 )2 CH=CH2 , and has a viscosity of 5,000 cSt at 25 deg.C; and (B) 50 pts. methylvinylpolysiloxane resin represented, e.g. by average formula [(Me)3 SiO1/2 ]x [Vi(Me)2 SiO1/2 ]y [SiO2 ]z [wherein x:y:z is 666:100:900 and x+y+z=1, and the amt. of Vi group is 0.00085 mol/g]; (C) 5.0 pts. a methylhydrogenpolysiloxane represented, e.g. by average formula (CH3 )3 SiO[H(CH3 )SiO]8 Si(CH3 )3 ; and (D) 200 pts. aluminum hydroxide; and (E) a platinum-base catalyst.

33. 发明专利

JPH09311149A METHOD OF ANALYZING HIGHER HARMONICS AND DEVICE THEREFOR 失效
公开(公告)号：JPH09311149A
公开(公告)日：1997-12-02
申请号：JP12808196
申请日：1996-05-23
申请人： RAILWAY TECHNICAL RES INST , SHOWA DENSHI KOGYO KK
发明人： MOCHINAGA YOSHIFUMI , HASE SHINICHI , YAMAMORI ISAO
IPC分类号： G01R23/16 , G01R23/20
摘要： PROBLEM TO BE SOLVED: To perform a precise analysis fitted for a standard with simple method and device by continuously performing a waveform analysis, and accumulating the basic wave of the instantaneous waveform and a Fourier transformed higher harmonic of each order for 30 minutes. SOLUTION: One cycle is divided equally to n-pieces to perform a sampling, the instantaneous waveform is averaged, for example, for one second, and a Fourier series analysis is performed by numerical analysis. A waveform analysis is continuously performed every second to accumulate the basic wave of the instantaneous waveform and the analyzed higher harmonics up to 40 orders for 30 minutes, and the maximum values are renewed and recorded. Thereafter, average values and maximum values for 30 minutes for the basic wave and the higher harmonic of each order, and the average and relative harmonic content to the basic wave are calculated, displayed and recorded. On the other hand, the higher harmonic current upper limit values at voltages of 6.6kV and 77kV are recorded, and an allowable value according to the received voltage and contract power is displayed. Since various data for the basic wave and the higher harmonic of each other, and the allowable value are thus displayed on the same screen, they can be easily compared to each other.

34. 发明专利

JPH09136560A AC FEEDING METHOD FOR RAILROAD 失效
公开(公告)号：JPH09136560A
公开(公告)日：1997-05-27
申请号：JP29389995
申请日：1995-11-13
申请人： RAILWAY TECHNICAL RES INST
发明人： MOCHINAGA YOSHIFUMI , HASE SHINICHI , UTSUKA TETSUO
IPC分类号： B60M3/00 , B60L1/00
摘要： PROBLEM TO BE SOLVED: To provide an AC feeding method which involves a scalene Scott- connection transformer and holds a Scott angle constant so that imbalance on the three-phase power supply side can be compensated regardless of the value of power factor angle. SOLUTION: When the Scott angle of a scalene Scott-connection transformer is 45 deg. and a load power factor is 1 with the use of two sets of inverters, reactive power compensation is effected at M- and T-sets; when the load power factor is about 0.8, reactive power compensation is effected at the M- and T-seats, and the two sets of inverters are directly linked for power interchange so that the M- and T-seats have uniform power, and a balance is made on the three- phase side.

35. 发明专利

JPH07237474A AC FEEDER CIRCUIT AND EXISTING LINE-NEW SHINKANSEN LINE SWITCHING CONSTRUCTION METHOD USING THIS AC FEEDER CIRCUIT 失效
公开(公告)号：JPH07237474A
公开(公告)日：1995-09-12
申请号：JP3041694
申请日：1994-02-28
申请人： NIPPON TETSUDO KENSETSU KODAN , RAILWAY TECHNICAL RES INST , TOSHIBA CORP
发明人： KINOSHITA SHINICHI , YAGI HIDEYUKI , MOCHINAGA YOSHIFUMI , HISAMIZU TAIJI , WADA JUNJI
IPC分类号： B60M3/02 , B60M3/04
摘要： PURPOSE:To supply stable power and further to attain smooth switching from existing line specification to new Shinkansen line specification by providing a tap, switching trolley wire voltage to the new Shinkansen line specification and to the existing line specification, in an autotransformer of 1:n system. CONSTITUTION:In the case of running an existing line electric rolling stock 6 on a rail 5 of existing line specification, power supply voltage of 55kV is supplied as the existing line specification from a substation 1 accross a trolley wire 2 and a feeder wire 3. A switching tap 7 of an autotransformer 4 is left as switched to a side of an existing line specification contact B. In the case of switching to new Shinkansen line specification, the power supply voltage of the substation 1 is switched to 63kV, and the switching tap 7 is switched to a new Shinkansen line specification contact A. Even before and after switching by the switching tap 7, since voltage between rail/feeder is fixed to switch only trolley wire voltage matched with the existing line/new Shinkansen line, changing the power supply voltage from the substation is only required by a voltage difference 8kV between the existing line specification and the new Shinkansen line specification.

36. 发明专利

JPH07117531A METHOD FOR CHARGING DIFFERENT POWER SOURCE IN SWITCHING SECTION OF AC ELECTRIC RAILWAY 失效
公开(公告)号：JPH07117531A
公开(公告)日：1995-05-09
申请号：JP28598293
申请日：1993-10-20
申请人： RAILWAY TECHNICAL RES INST
发明人： AGUI KOJI , MOCHINAGA YOSHIFUMI
IPC分类号： B60M3/04
摘要： PURPOSE:To prevent the unloaded excited rush current by obtaining the optimum charging phase where the unloaded excited rush current to be generated in a main transformer of an electric rolling stock becomes minimum by the effective value of the power source voltage on the charging side, the effective value of the change-over section voltage, and the phase difference of the change-over section voltage while monitoring the pattern to charge the power source. CONSTITUTION:A transformer 11 for instruments is connected to a change-over section 8, the pattern is monitored, and the pattern of the power source voltage on the charging side is simultaneously monitored by a transformer 12 for instruments. When an electric rolling stock 9 is advanced to the change-over section 8, a change-over switch 6 on the open side is opened, and the change-over section 8 is disconnected from the power source, and the residual voltage is generated in the change-over section by the induced electromotive force of an auxiliary rotary machine 14 connected to the tertiary winding of the main transformer of the electric rolling stock 9. A change-over switch 7 on the charging side is charged in an interlocking manner after the change-over switch 6 on the open side is opened, and the voltage of a main transformer 10 of the electric rolling stock is boosted. The different power source is charged at the optimum charging point from the voltage value and the phase angle of lag of the change-over switch 7 and the change-over section 8.

37. 发明专利

JPH06284514A HARMONIC RESTRAINT METHOD OF PWM-CONTROLLED ELECTRIC RAILCAR IN AC FEEDER CIRCUIT 失效
公开(公告)号：JPH06284514A
公开(公告)日：1994-10-07
申请号：JP5934793
申请日：1993-02-25
申请人： RAILWAY TECHNICAL RES INST
发明人： MOCHINAGA YOSHIFUMI , HISAMIZU TAIJI
IPC分类号： B60L13/00 , B60M3/00
摘要： PURPOSE:To eliminate a higher harmonic fault by terminating a terminal by a resistor and a capacitor approximately equal to the characteristic impedance of an AC feeder circuit composed of double tracks, apparently forming an infinite length line to high frequency and connecting a reactor having a large value in parallel with the resistor in high frequency. CONSTITUTION:Double track type lines, on which a PWM-controlled electric railcar 10 travelling at high speed, is made to travel, are constituted of trolley lines 3, 3 for down and for up, feeders 5, 5 and rails 4, 4, and high ACs are supplied from a transformer 2. The terminals of the trolley lines 3 and the feeders 5 are terminated by the series circuit of a capacitor C and a resistor R approximately equal to the characteristic impedance of a feeder circuit and a reactor L is connected in parallel with the resistor R. Reactance is augmented with the increase of the order of higher harmonics in the reactor L. Accordingly, the resonance of higher harmonics in approximately 1000-2000Hz is inhibited and a higher harmonic fault is eliminated, and power loss by the resistor is reduced.

38. 发明专利

JPH06261548A UNBALANCE COMPENSATOR FOR THREE PHASE/TWO PHASE CONVERTER 失效
公开(公告)号：JPH06261548A
公开(公告)日：1994-09-16
申请号：JP4760593
申请日：1993-03-09
申请人： RAILWAY TECHNICAL RES INST , MITSUBISHI ELECTRIC CORP
发明人： MOCHINAGA YOSHIFUMI , HISAMIZU TAIJI , TAKEDA MASATOSHI , MIYASHITA TAKESHI
IPC分类号： H02J3/18 , H02M5/14 , H02M5/45
摘要： PURPOSE:To obtain an unbalance compensator capable of suppressing harmonic current by comprising a converter control circuit which controls a both power converter on the basis of command signals from a power interchange control circuit, a reactive power compensation circuit, and a harmonic circuit. CONSTITUTION:A power converter 10 communicates power in both directions between AC power of an M connection power source circuit on the secondary side of a Scott connection transformer 2 and DC power of a DC intermediate circuit, and a power converter 11 between AC power of a T connection power source circuit and DC power of the DC intermediate circuit. A power interchange control circuit 15, a DC voltage control circuit 16, a reactive power compensation circuit 17, and a harmonic compensation circuit 18 output command signals complying with control targets, which are synthesized in a batch by a current command operational circuit 19, so that the power converters 10,11 undergo on-off switching control through a current control circuit 20 and a PWM control circuit 21 on the basis of the command signal. As a result, two-phase side active power becomes equal, and simultaneously reactive power and harmonic current are compensated to provide a complete equalization of current.

39. 发明专利

JPH0543530B2 失效
公开(公告)号：JPH0543530B2
公开(公告)日：1993-07-01
申请号：JP18817886
申请日：1986-08-11
申请人： RAILWAY TECHNICAL RES INST , MEIDENSHA ELECTRIC MFG CO LTD
发明人： MOCHINAGA YOSHIFUMI , FUJE HIROSHI , ATAGI SADAJI , GONDO TOYOMI
IPC分类号： B60M3/00 , H02J3/00

40. 发明专利

JPH01269068A DETECTING METHOD FOR DIFFERENT MIXING FREQUENCY IN ELECTRIC POWER SOURCE OF AC FEEDING CIRCUIT 失效
公开(公告)号：JPH01269068A
公开(公告)日：1989-10-26
申请号：JP9678588
申请日：1988-04-21
申请人： RAILWAY TECHNICAL RES INST
发明人： TORII MASAHARU , MOCHINAGA YOSHIFUMI
IPC分类号： G01R31/00
摘要： PURPOSE:To make a decision speedy for an existence of a closed mixing frequency by sampling with a 600Hz the mixing frequency closed to 50Hz and 60Hz of an AC feeding circuit and converting instantaneous values of 50Hz and 60Hz components obtained by specified arithmetic operation to the respective root-mean-square values then comparing with setting values. CONSTITUTION:The mixing frequencies closed to 50Hz and 60Hz of the AC feeding circuit are sampled with the 600Hz frequency. Next, a digital value before 5 sampling is added to the sampling digital value and the instantaneous value of the 50Hz component is obtained in the result of dividing by 2Xcos(5pi/12). Also the digital value before 6 sampling is added to the sampling digital value and the instantaneous value of the 60Hz component is obtained in the result of dividing by 2Xcos(1.2pi/2). These instantaneous values are converted to the root-mean-square values by double products method, etc., then compared with the setting values in the manner that the 50Hz and 60Hz frequency components are made to be the operating elements. Thus, the existence of the closed mixing frequency can be measured in a short time.

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