专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明专利

JPH02250626A GTO THYRISTOR ARM 失效
公开(公告)号：JPH02250626A
公开(公告)日：1990-10-08
申请号：JP6858789
申请日：1989-03-20
申请人： FUJI ELECTRIC CO LTD
发明人： KINOSHITA SHIGENORI
IPC分类号： H02H7/12 , H02M1/06
摘要： PURPOSE:To increase allowance of irregularity in a GTO by dividing arms into a plurality of blocks, and connecting voltage clampers to the blocks. CONSTITUTION:Voltage clampers 201-203 are connected to unit blocks 101-103 connected in series. The clamper 201 has a diode 212, a capacitor 211 connected in series with the diode 212, and a resistor 213 connected in parallel therewith, and the value of the resistor 213 is sufficiently larger than the snubber resistance value of the block 101. The other clampers 202, 203 are similar. An irregularity in the turning OFF time of a GTO in the block is allowed to several times as large as a conventional one.

32. 发明专利

JPH0265605A DRIVE SYSTEM FOR AC ELECTRIC VEHICLE 失效
公开(公告)号：JPH0265605A
公开(公告)日：1990-03-06
申请号：JP21558488
申请日：1988-08-30
申请人： FUJI ELECTRIC CO LTD
发明人： KINOSHITA SHIGENORI , MOROHOSHI YUKINOBU
IPC分类号： B60L9/12
摘要： PURPOSE:To increase acceleration at starting by connecting two or more sets of motor group comprising one or more series connected DC motors in series with the side of DC output produced through rectification of AC power source when the motors are started while in parallel during high speed operation thereof. CONSTITUTION:High voltage single phase AC power is fed from a feeder 100 through a panthograph 1 and a circuit breaker 2 to the primary winding 31 of a main transformer 3 then the power is fed back through a wheel 4 to a rail 400. Outputs from the secondary windings 32, 33 of the main transformer 3 are fed to series connected rectifiers 51, 52 thus constituting a DC power source. Two sets of motor group comprising a plurality of series connected DC series motors 81-84, 91-94 are connected through series/parallel switches SW1, SW2 to the DC output side. When the motors are started, the switches SW1, SW2 are connected to the side S so as to connected the motor groups in series and when the motors reach to a predetermined speed, the switches SW1, SW2 are connected to the side P so as to connect the motor groups in parallel.

33. 发明专利

JPH01274603A VVVF DRIVE SYSTEM FOR AC ELECTRIC VEHICLE 失效
公开(公告)号：JPH01274603A
公开(公告)日：1989-11-02
申请号：JP10170088
申请日：1988-04-25
申请人： FUJI ELECTRIC CO LTD
发明人： KINOSHITA SHIGENORI
IPC分类号： B60L7/14 , B60L9/24
摘要： PURPOSE:To prevent degradation of performance during reverse converting operation, by connecting a unit drive system comprising a source side power converter constituted into a bridge of reverse-block self-extinction semi-conductor switch elements and a PWM control inverter to every truck of an electric vehicle. CONSTITUTION:AC motors 151-154 are connected through single-phase bridges 71, 72 constituted with reverse-block self-extinction semi-conductor switch elements and PWM control VVVF inverters 111, 112 to the secondary windings 41, 42 of a main transformer 4. When powering operation is made, a powering/ regenerative brake switch 9 is switched to P, P side and the single-phase bridges 71, 72 perform forward conversion operation as separately excited converters. When regenerative brake operation is made, the powering/regenerative brake switch 9 is switched to B, B side so that the single-phase bridges 71, 72 perform reverse conversion operation and the commutation margin angle of the reverse- block self-extinction semi-conductor switch element goes to zero through self- extincting function.

34. 发明专利

JPS6455076A FEEDING SYSTEM USING POLYPHASE MULTIPLE PWM INVERTER 失效
公开(公告)号：JPS6455076A
公开(公告)日：1989-03-02
申请号：JP21027487
申请日：1987-08-26
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUMOTO HISAO , TAKAMI HIROSHI , KINOSHITA SHIGENORI , YANASE TAKAO
IPC分类号： H02M7/48 , H02M7/497 , H02P27/06
摘要： PURPOSE:To control higher harmonics by inserting a reactor having a plurality of windings between a polyphase multiple PWM inverter and a load so that there exists a given phase relation between carrier signals of PWM signals. CONSTITUTION:A three-phase double inverter 2 composed of two sets of three- phase inverters supplies a three-phase double winding motor 4 with electricity via a three phase-composed coupling reactor 3. Said motor is provided with two sets of windings of three-phase windings 11-23 with O1-O2 as neutral points, and respective windings are connected with two sets of three-phase arms 113-233 of said inverter via the windings 111-232 of three-phase cores 31-33 of the coupling reactor 3. In order to use the function of absorption and elimination of harmonic voltage by the coupling reactor 3 effectively, it is necessary that a given phase relation exists between a signal wave and a carrier wave. This means that a phase difference between signal waves of output voltage fundamental harmonics is set to pi/6 and phase differences between carrier waves with all phase are made equal to each other at the point of time when a sine wave signal increases from zero.

35. 发明专利

JPS63290200A EXCITATION ADJUSTING DEVICE OF ALTERNATING CURRENT GENERATOR 失效
公开(公告)号：JPS63290200A
公开(公告)日：1988-11-28
申请号：JP12345287
申请日：1987-05-20
申请人： FUJI ELECTRIC CO LTD
发明人： SHIOZAKI YASUSHI , KINOSHITA SHIGENORI
IPC分类号： H02P9/30
摘要： PURPOSE:To improve the setting efficiency of generator output voltage by means of the modulation signal of the constant frequency reference triangle wave signal for a mean value of the field magnetic current as an operational signal of the field magnetic current. CONSTITUTION:A signal voltage V38 and a signal voltage Va1 with the same polarity component are obtained with addition of a mean value signal voltage V31 of the field magnetic current If outputted from a current detector 31 and the constant frequency reference triangle wave signal voltage V38 outputted from a triangle wave oscillator 38. And, a signal voltage Va2 is obtained by addition of the signal voltage Va1 and the signal voltage 31. The output signal voltage Va2 having output signal voltage V34 of a voltage adjustor 34 as a target value is added to a comparator 35 as the operational signal voltage of the field magnetic current 1f subject to follow-up control. And, the output signal of the comparator 35 gains chopping control of a chopper 25.

36. 发明专利

JPS63164524A SEMICONDUCTOR CIRCUIT BREAKER 失效
公开(公告)号：JPS63164524A
公开(公告)日：1988-07-07
申请号：JP31314986
申请日：1986-12-25
申请人： FUJI ELECTRIC CO LTD
发明人： OKA YUKIO , KINOSHITA SHIGENORI , ARAI KENICHI , TANAKA SHIGEO
IPC分类号： H03K17/73 , H03K17/732
摘要： PURPOSE:To prevent elements from being damaged by means of simple constitution by connecting two reverse-blocking GTO thyristors reversely in parallel and simultaneously turning on and off both the reverse-blocking GTO thyristors. CONSTITUTION:Two reverse-blocking GTO thyristors 6F, 6R are connected reversely in parallel between a DC power supply 1 and a load 2. These reverse- blocking thyristors 6F, 6R are driven by gate driving circuits 7F, 7R controlled by a common control circuit 10 so as to be simultaneously turned on and off.

37. 发明专利

JPS63144800A EXCITATION REGULATING FOR AC GENERATOR 失效
公开(公告)号：JPS63144800A
公开(公告)日：1988-06-16
申请号：JP29196386
申请日：1986-12-08
申请人： FUJI ELECTRIC CO LTD
发明人： SHIOZAKI YASUSHI , INAGAKI SHINJI , KINOSHITA SHIGENORI
IPC分类号： H02P9/30 , H02P9/10
摘要： PURPOSE:To improve the settling property of generator output voltage, by putting constant-frequency reference chopping wave signal together with the average value of field current signal, to shape a waveform, and by obtaining the field current signal as trapezoidal pulse train signal. CONSTITUTION:From a wave filter 37, the output of the average value signal V37 of field current If is generated. By an adder ADD1, the average value signal V37 and constant-frequency reference chopping wave signal V38 are added to each other, and the polarity of the sum of both the input signals is inverted, and the output of the signal Va1 of the same polarity component only as that of the signal V38 is generated. Besides, by an adder ADD2, the signals V37 and Va1 are added to each other, and the output of signal Va2 is generated. Then, by a comparator 35, current command V34 according to a deviation between a voltage setting value and generator output voltage Vg is compared with the signal Va2, and the output of ON/OFF-control signal is directed to a field current controlling field chopper 23.

38. 发明专利

JPS62227828A DIRECT CURRENT ELECTRIC-CAR FEEDING METHOD 失效
公开(公告)号：JPS62227828A
公开(公告)日：1987-10-06
申请号：JP7304086
申请日：1986-03-31
申请人： FUJI ELECTRIC CO LTD
发明人： KINOSHITA SHIGENORI
IPC分类号： B60M3/02
摘要： PURPOSE:To widen an interval between substations substantially by increasing electric voltage of a feeding line from a substation steeply up to one higher than voltage of an electric-car so as to drop it down by means of a semi-conductor DC-DC transducer which makes conversion possible to either the normal or reverse direction whereby feeding to the electric-car. CONSTITUTION:Electric power fed by a power system through each high voltage line 13 and 23 is conducted to a line 3 through each feeding substation 1 and 2 which is composed of each transformer 11 and 21 and each semi-conductor transducer 12 and 22 for feeding direct current to DC electric cars 61 through 63. In this type of a feeding system, a main feeding line 7 is separately provided whereby its voltage is made higher than electric-car voltage. And the feeding line 3 is made an auxiliary feeding line, semi-conductor DC-DC transducers 81 through 83 such as a chopper and the like which make conversion possible either to the normal or reverse direction, are provided between both of the feeding lines 3 and 7 at interval equivalent to a space between substations whereby voltage of the main feeding line 7 is stepped down to electric-car voltage by means of these transducers 81 through 83. And DC electric- cars 61 through 63 collect current from both an electric overhead line 4 connected with the feeding line 3 and a rail 5.

39. 发明专利

JPS6240947B2 失效
公开(公告)号：JPS6240947B2
公开(公告)日：1987-08-31
申请号：JP16357379
申请日：1979-12-18
申请人： FUJI ELECTRIC CO LTD
发明人： KINOSHITA SHIGENORI
IPC分类号： B60L7/16 , G05F1/56 , H02M1/08 , H02M7/12 , H02M7/19

40. 发明专利

JPS61284944A COOLING SYSTEM OF INTERNAL COMBUSTION ENGINE DRIVE ELECTRIC VEHICLE 失效
公开(公告)号：JPS61284944A
公开(公告)日：1986-12-15
申请号：JP12572285
申请日：1985-06-10
申请人： FUJI ELECTRIC CO LTD
发明人： KINOSHITA SHIGENORI
IPC分类号： H01L23/34 , B61C17/00
摘要： PURPOSE:To reduce the size and the cost of a semiconductor converter by disposing reactors and resistors in the same cooling system as that of an internal combustion engine, and disposing semiconductor elements in another cooling system, thereby improving the cooling efficiency of electric parts of the converter. CONSTITUTION:When motors 7, 8 of a vehicle are connected through semiconductor converters 3, 5, 6 with a generator 2 coupled with an internal combustion engine 1, electric parts such as reactors and resistors having higher allowable temperature than a semiconductor element of the parts of the converters 3, 5, 6 are disposed in the same cooling system as that of the engine, and the elements are disposed in another cooling system. For example, GTO thyristors 11, 12 of semiconductor elements of inverters 5, 6, diodes 21, 22 412, 422, 511, 512, capacitors 411, 421 are disposed in the cooler of a system 200 with exclusive forcible cooling provided in the inverters 5, 6, and the remaining electric parts of the inverters 5, 6, i.e., reactors 31, 32 and resistors 412, 423, 512, 522 are disposed in an oil cooling system 100 of the cooler using oil of the engine 1 as coolant.

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