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1. 发明专利

JPH0417036B2 失效
公开(公告)号：JPH0417036B2
公开(公告)日：1992-03-25
申请号：JP23866385
申请日：1985-10-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： NISHI YOSHIO , YANO SADANARI
IPC分类号： H02P27/06

2. 发明专利

JPS62100191A DRIVE SYSTEM FOR MULTIPLEX-WINDING AC MOTOR 失效
公开(公告)号：JPS62100191A
公开(公告)日：1987-05-09
申请号：JP23866385
申请日：1985-10-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： NISHI YOSHIO , YANO SADANARI
IPC分类号： H02P27/06
摘要： PURPOSE:To prevent the generation of abnormal currents by inter-winding magnetic coupling without mounting an AC reactor by bringing the voltage of each input winding to the same phase and bringing momentary voltage to the same voltage. CONSTITUTION:PWM system voltage type inverters 21a, 21b using self-arc- extinguishing type switching elements each supply input windings 4a, 4b for duplex winding type induction motors 4 directly with three-phase AC voltage Va, Vb having waveforms shown in the figures (a)-(b). Accordingly, since voltage having the same phase is fed to the input windings 4a, 4b-that is, momentary voltage is made the same at all times, there is inter-winding magnetic coupling, but abnormal currents do not flow, and an AC reactor may not be mounted.

3. 发明专利

JPS6026498A OPERATING DEVICE OF VARIABLE VOLTAGE VARIABLE FREQUENCY POWER SOURCE 失效
公开(公告)号：JPS6026498A
公开(公告)日：1985-02-09
申请号：JP13709783
申请日：1983-07-25
申请人： MITSUBISHI ELECTRIC CORP
发明人： MIZOGUCHI SHIYOUJI , YANO SADANARI , NISHI YOSHIO
IPC分类号： H02P5/74 , H02P7/74
摘要： PURPOSE:To suppress the variation in the DC bus voltage to the minimum by displacing the power drive and regenerative times by suitable time by inverters. CONSTITUTION:Output frequency command values f11, f12, f13, f2 which include power drive and regenerative information of inverters are outputted by power drive and regenerative start signal shifter 80 which inputs the output frequency command values f1, f2... of inverter group which include power drive, regenerative and output frequency information of inverters and displaces the varying points of the power drive and regenerative signals of the inverter between inverters 9a, 9b, 9c, 9d... at the time point when the power drive, regenerative commands of the inverter group vary so that the varying point of the power drive and regenerative signals become minimum in the variation in the DC bus voltage Vdc.

4. 发明专利

JPS596152B2 JPS596152B2 - 失效
公开(公告)号：JPS596152B2
公开(公告)日：1984-02-09
申请号：JP8162377
申请日：1977-07-07
申请人： Mitsubishi Electric Corp
发明人： NISHI YOSHIO
IPC分类号： H02P1/22 , H02P3/14

5. 发明专利

JPS5416616A SIGNAL PHASE STATIC LEONARD DEVICE 失效
公开(公告)号：JPS5416616A
公开(公告)日：1979-02-07
申请号：JP8162377
申请日：1977-07-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： NISHI YOSHIO
IPC分类号： H02P1/22 , H02P3/14
摘要： PURPOSE:To enable to control upto high voltage, by providing addition ignition device among positive and negative commutation devices and each ignition circuit of positive and negative circuits.

6. 发明专利

JPS63117665A DC BUS TYPE AC VARIABLE SPEED APPARATUS 失效
公开(公告)号：JPS63117665A
公开(公告)日：1988-05-21
申请号：JP26247986
申请日：1986-11-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： NISHI YOSHIO
IPC分类号： H02M7/155 , G05F1/10 , H02M5/45 , H02M5/453 , H02M7/12 , H02M7/17
摘要： PURPOSE:To stabilize a control operation of a DC bus type AC variable speed apparatus by measuring the amplitude of a starting current at the time of rising the apparatus and the rising time of a DC voltage to calculate the smoothing condenser value of a load, and regulating the gain of a voltage controller in response to the value. CONSTITUTION:A DC power is supplied through a DC power source 2 for obtaining a constant DC voltage from a 3.phase AC power source 1, a reactor 3, smoothing condensers 4-1-4-n to voltage type inverters 5-1-5-n, converted to an AC of variable voltage and variable frequency to drive induction motors IM. In this case, a comparator 11 for detecting the rise up to a rated DC voltage, a DC current detector 12, an integrator 13, a gain regulator 14 and a voltage controller 15 are provided, and the gain of the controller 15 is regulated to a gain reversely proportional to the output of the integrator. Thus, an optimum voltage control state is held irrespective of a load condition to be able to perform a stable control operation.

7. 发明专利

JPS61100023A Inverter 失效
标题翻译：逆变器
公开(公告)号：JPS61100023A
公开(公告)日：1986-05-19
申请号：JP22332584
申请日：1984-10-22
申请人： Mitsubishi Electric Corp
发明人： NISHI YOSHIO , YANO SADANARI
IPC分类号： H03K19/098 , H02M7/515
CPC分类号： H02M7/5387
摘要： PURPOSE:To obtain an inverter with good efficiency by regenerating the energy stored in a snubber capacitor when a gate turn-off thyristor is turned off to a power supply through a capacitor and a regenerating inverter. CONSTITUTION:A series circuit comprising capacitors C31a, 31b and snubber diodes D32a, 32b is connected respectively in parallel with gate turn-off thyristors C31a, D32a and a connecting point between the C31b, D32b respectively via discharge D51a, 51b. When the GTO21a is turned on, a load current flows, and the energy stored in the C31a, 31b just after the GTO21a, 21b are turned off is discharged by a current passing through a path of D22b current limit reactor 24b load W and a current flowing to a path of D51b C6 D51a D32a L24a load W. A discharge current from the C31b is fed to the C6 at each of three phases and when the voltage rises, the energy of the C6 is regenerated to an AC power supply through as L7 and the regenerative inverter 8.
摘要翻译：目的：当栅极关断晶闸管通过电容器和再生逆变器关闭到电源时，通过再生存储在缓冲电容器中的能量来获得效率更高的逆变器。构成：包括电容器C31a，31b和缓冲二极管D32a，32b的串联电路分别通过放电D51a，51b分别与栅极截止晶闸管C31a，D32a和C31b，D32b之间的连接点并联连接。当GTO21a接通时，流过负载电流，刚刚在GTO21a，21b关闭之后存储在C31a，31b中的能量被通过D22b限流电抗器24b的负载W和电流的电流放电流向D51b C6 D51a D32a L24a负载W的路径。三相放电电流从C31b馈入C6，当电压上升时，C6的能量通过L7再生成交流电源和再生逆变器8。

8. 发明专利

JPS60132395A COOLER 失效
公开(公告)号：JPS60132395A
公开(公告)日：1985-07-15
申请号：JP24264483
申请日：1983-12-20
申请人： MITSUBISHI ELECTRIC CORP
发明人： NISHI YOSHIO
IPC分类号： H05K7/20

9. 发明专利

JPS6013493A AC VARIABLE SPEED DEVICE OF DC BUS TYPE 失效
公开(公告)号：JPS6013493A
公开(公告)日：1985-01-23
申请号：JP11962283
申请日：1983-06-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： NISHI YOSHIO , YANO SADANARI
IPC分类号： H02P5/74 , H02P7/74
摘要： PURPOSE:To suppress the variation in a DC bus voltage to the minimum limit by applying a signal proportional to the current of a DC bus to an input circuit of a voltage controller of a converter as an operating mode switching acceleration signal when shifting to an operating mode. CONSTITUTION:When the part of induction motors which are operated at the aligned speed are shifted to a regenerator operation, a DC bus voltage Vd starts rising, a power drive generative conversion detector 11 outputs to close a switch 12. Accordingly, an operating mode conversion acceleration signal P is applied in the same polarity as the output of a DC voltage detector 7 to a butting point 0. Thus, since the input of a voltage controller 9 becomes a large regenerative command input, a converter 2 rapidly shifts to the regenerative operation, the rise of the DC bus voltage Vdc is suppressed, and the variation in the speeds of induction motor IM group which are not operated at the aligned speed.

10. 发明专利

JP2000184720A CONVERTER AND INVERTER DEVICE 失效
公开(公告)号：JP2000184720A
公开(公告)日：2000-06-30
申请号：JP35054598
申请日：1998-12-09
申请人： MITSUBISHI ELECTRIC CORP
发明人： NISHI YOSHIO
IPC分类号： H02M7/10 , H02M7/483 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To reduce costs by equipping a rectifier that rectifies power converted by a transformer and has three output terminals for giving different DC voltages and a smoothing reactor for smoothing an intermediate voltage in the DC voltages. SOLUTION: A DC current that is rectified by a converter 6b is charged to smoothing capacitors 4a and 4b. A smoothing reactor 3c suppresses an unneeded current that rises instantly due to the difference between the instantaneous value of the output voltage of a rectifier 2a and that of the charge voltage of the smoothing capacitors 4a and 4b and suppresses a ripple current that flows to the rectifiers 2a and 2b and the smoothing capacitors 4a and 4b. A DC voltage that is outputted from the converter 6b is divided by the smoothing capacitors 4a and 4b and each voltage with levels [P], [C], and [N] is supplied from the three nodes of the series circuit of the smoothing capacitors 4a and 4b. A current flowing to the smoothing reactor 3c becomes approximately 1/10, thus reducing the number of smoothing reactors, reducing the external dimensions of the converter and inverter, and reducing costs.

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