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1. 发明专利

JPS57162998A EXCITATION CONTROLLER FOR GENERATOR 失效
公开(公告)号：JPS57162998A
公开(公告)日：1982-10-06
申请号：JP4654781
申请日：1981-03-31
申请人： HITACHI LTD , HITACHI OMIKA DENKI
发明人： MOMOCHI YASUSHI
IPC分类号： H02P9/14 , H02J3/48 , H02J3/50
摘要： PURPOSE:To enhance the power factor of purchased power at the time of varying the power in a place by varying the output terminal voltage of the generator in cooperation with the variation in a load. CONSTITUTION:When a load variation start signal 12 is applied, a program signal generator 14 generates an output voltage Vp responsive to the shape of the variation in the load predetermined in advance. Signal distributor 14A, 14B distribute the output voltage Vp, and apply the voltage through contacts 16A, 16B to the automatic voltage regulators 18A, 18B of generators 5, 6 of a non-utility generator facility. The regulators 18A, 18B regulate thyristor exciters 24A, 24B in response to the output voltages of voltage setters 19A, 19B, the output voltages of signal distributors 14A, 14B, the output voltages of voltage transformers 26A, 26B and the outputs of reactive power compensators 30A, 30B. In this manner, the power factor of the purchased power at the time of varying the power in the place can be enhanced.

2. 发明专利

JPS58207827A RECEIVED POWER FACTOR CONTROLLER 失效
公开(公告)号：JPS58207827A
公开(公告)日：1983-12-03
申请号：JP8991682
申请日：1982-05-28
申请人： HITACHI LTD , HITACHI OMIKA DENKI
发明人： WAKUKAWA TAKESHI , MOMOCHI YASUSHI
IPC分类号： H02J3/50

3. 发明专利

JPS58165699A EXCITATION CONTROLLER FOR SYNCHRONOUS MACHINE 失效
公开(公告)号：JPS58165699A
公开(公告)日：1983-09-30
申请号：JP4740982
申请日：1982-03-26
申请人： HITACHI LTD , HITACHI OMIKA DENKI
发明人： MOMOCHI YASUSHI
IPC分类号： H02P9/30 , H02H7/06 , H02P9/14
摘要： PURPOSE:To prevent a synchronous machine from overexciting at a low frequency by controlling in phase back when the control voltage of a field breaker tripping circuit becomes lower than the prescribed value or when the trio interlock of the machine is operated. CONSTITUTION:An exciting voltage forming circuit 4 normally controls a thryistor exciter 11 in response to a deviation signal 130 between the output voltage 110 of a synchronous machine 1 and a voltage set value 120. The fact that the control voltage of the trip circuit of a field breaker 5 becomes lower than the prescribed value or that a synchronizing trip interlock is operated is detected at the abnormal time when the machine 1 is disconnected from a system 3, and a control circuit 9 control in phase back the circuit 4, thereby reducing the exciting current. In this manner, the low frequency overexcitation of the machine can be prevented.

4. 发明专利

JPS56150929A RECEIVED POWER FACTOR CONTROL DEVICE 失效
公开(公告)号：JPS56150929A
公开(公告)日：1981-11-21
申请号：JP5294180
申请日：1980-04-23
申请人： HITACHI LTD , HITACHI OMIKA DENKI
发明人： NUMATA SHIYOUHEI , MOMOCHI YASUSHI
IPC分类号： H02J3/50 , H02J3/18

5. 发明专利

JP2000038990A CONTROL DEVICE AND CONTROL METHOD FOR AIR COMPRESSION DEVICE 失效
公开(公告)号：JP2000038990A
公开(公告)日：2000-02-08
申请号：JP20522398
申请日：1998-07-21
申请人： HITACHI LTD , HITACHI ELECTRIC SYSTEMS
发明人： TANABE MAMORU , MOMOCHI YASUSHI , HAYASHI YOSHIO , TAKAHASHI MATSUO
IPC分类号： F04B49/06 , F04B49/08 , G05B1/01 , G05B11/18 , G05D16/20
摘要： PROBLEM TO BE SOLVED: To stably control an air compression device, and concurrently, control a supply of compressed air neither more nor less to loading equipment. SOLUTION: This control device is equipped with an air compression device provided with air compressors C1 through C4, a compressed air feeding part feeding compressed air outputted out of the air compression device to loading equipment L1 through Ln to be connected by way of a receiver tank R1, and with a compressed air control part 4 controlling compressed air to be outputted out of the air compression device based on a target pressure and an initial pressure to be detected by the receiver tank R1. In this case, a target pressure correction means 20 is provided for the compression air control part 4, which detects the lowest end pressure out of end pressure to be fed to respective loading equipment at specified time intervals, selects the minimum end pressure and the minimum end pressure deviation out of the pressure deviation from the respective target end pressure, outputs correction pressure that decreases/ increases in order the deviation of end pressure at a specified rate for the specified period of time, and thereby corrects the target pressure by the use of the aforesaid correction pressure.

6. 发明专利

JPS5468963A RECEIVED POWERRFACTOR IMPROVING CONTROLLER 失效
公开(公告)号：JPS5468963A
公开(公告)日：1979-06-02
申请号：JP13460377
申请日：1977-11-11
申请人： HITACHI LTD
发明人： MOMOCHI YASUSHI
IPC分类号： G05F1/70 , H02J3/18
摘要： PURPOSE:To improve the received power-factor, by taking the operation outputs of electric generators into consideration and distributing generator control instruction signals to automatic voltage regulators for the generators and thereby controlling the reactive power share. CONSTITUTION:The received power-factor of an electric station connected to a plurality of electric generators and loads is improved. The difference between the reactive power detected by a reactive power detector 1 and a setpoint is determined. A polarity discriminator 3 is operated by the difference signal DELTAQ. The output signals of output limit setting units 6 for the generators 10 are applied to generator output margin detectors 7 to produce output margin signals, which are set as distribution coefficients for the generators 10 by an adder 8 and calculators 9. Multipliers 4 multiply said difference signals by the distribution coefficients. Then, the products are applied to the generators 10 through controllers 5. Therefore, the reactive power share can be controlled in consideration of the margins between the real outputs of the generators and allowable values therefore.

7. 发明专利

JPS5365910A FIELD CONTROLLER FOR SYNCHRONOUS MACHINE 失效
公开(公告)号：JPS5365910A
公开(公告)日：1978-06-12
申请号：JP14115776
申请日：1976-11-26
申请人： HITACHI LTD
发明人： MOMOCHI YASUSHI
IPC分类号： H02P9/30 , H02P9/10
摘要： PURPOSE:To enable a thyristor in the thyristor excitor commonly used for bypassing a field current, by appling a continuous pulse of short period to the thyristor excitor thorugh a pulse amplifier as a firing pulse when opening AC breaker.

8. 发明专利

JPS52100111A FIELD INVERSE VOLTAGE SUPPRESSOR 失效
公开(公告)号：JPS52100111A
公开(公告)日：1977-08-22
申请号：JP1592276
申请日：1976-02-18
申请人： HITACHI LTD
发明人： GOTOU MASUO , MATSUZAKI TAKESHI , MOMOCHI YASUSHI , ISONO AKIRA
IPC分类号： H02P23/00 , H02P9/14 , H02P9/30 , H02P103/20
摘要： PURPOSE:To smooth a steep build-up inverse voltage by providing an impedance in parallel with a field winding.

9. 发明专利

JPS61128798A Excitation controller 失效
标题翻译：激励控制器
公开(公告)号：JPS61128798A
公开(公告)日：1986-06-16
申请号：JP24960784
申请日：1984-11-28
申请人： Hitachi Electric Syst:Kk , Hitachi Ltd
发明人： URATA SEISHI , MOMOCHI YASUSHI , KITADA TAKAYOSHI
IPC分类号： H02P9/08 , H02P9/10 , H02P9/30
CPC分类号： H02P9/107 , H02P9/08
摘要： PURPOSE:To prevent an overvoltage from applying to a field winding and a field circuit device by composing a bypass circuit when the reverse voltage of the winding becomes the prescribed value or higher. CONSTITUTION:A current is flowed as a solid line before a field switch 5 is opened, a positive voltage is generated at field P-pole and a negative voltage is generated at N-pole. Negative voltage is generated at the P-pole and positive voltage is generated at the N-pole at switch opening time. At this time, when a voltage V0 between the gate and the cathode of a thyristor 11 for a bypass circuit becomes the specified value or larger, a signal is applied to the gate of a thyristor 11 by the voltage divided by resistors 15, 16 to conduct the thyristor 11. As a result, a reverse voltage generated between the field P- and N-poles when the switch 6 is opened is suppressed to the voltage of the product of the current flowed to the thyristor 11 and the resistance.
摘要翻译：目的：通过在绕组的反向电压达到规定值以上时，通过构成旁路电路来防止过电压施加到励磁绕组和励磁电路装置。构成：在场开关5断开之前，电流以实线流动，在场P极产生正电压，在N极产生负电压。在P极产生负电压，在开关打开时在N极产生正电压。此时，当用于旁路电路的晶闸管11的栅极和阴极之间的电压V0变为规定值以上时，通过由电阻器15,16分压的电压将信号施加到晶闸管11的栅极，导通晶闸管11.结果，当开关6断开时，在场P-和N极之间产生的反向电压被抑制到流向晶闸管11的电流的乘积的电压和电阻。

10. 发明专利

JPS5850120B2 JPS5850120B2 - 失效
公开(公告)号：JPS5850120B2
公开(公告)日：1983-11-08
申请号：JP13515675
申请日：1975-11-12
申请人： Hitachi Ltd
发明人： MOMOCHI YASUSHI
IPC分类号： H02P9/14

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