专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0888972A POWER SUPPLY 失效
公开(公告)号：JPH0888972A
公开(公告)日：1996-04-02
申请号：JP21894394
申请日：1994-09-13
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KANAZAWA TORU , KUBO HIROSHI , KOSEKI SHOICHIRO , HIRAKAWA SATOSHI
IPC分类号： H05H7/04 , G05F1/10 , H02M1/15 , H02M7/12 , H02M7/155 , H05H13/04
摘要： PURPOSE: To provide a power supply whose stability at start of operation or stoppage is enough, and which has a high accuracy and besides a high-speed controllability at stationary time, though this is equipped with an active filter. CONSTITUTION: In a power supply, which is equipped with an active filter 10 for removing the AC component between a thyristor converter 1 and an electromagnet 3 to serve as load, a detector 12, which detects the state of the active filter 10, and a selector 13, which controls the gain of a feedback system, by the detection result of this detector 12, are provided. Accordingly, the gain of the whole control system is controlled, according to the state of the active filter 10, and at start of operation or at stoppage or when the output of the active filter 10 becomes excessive, it operates stably under low gain, and at stationary operation, high accuracy and high controllability can be given with high gain.

2. 发明专利

JPS61125620A Load fluctuation detecting circuit 失效
标题翻译：负载检测电路
公开(公告)号：JPS61125620A
公开(公告)日：1986-06-13
申请号：JP24604084
申请日：1984-11-22
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： KANAZAWA TORU , YAMAMOTO SHIGERU
IPC分类号： G05F1/56
摘要： PURPOSE: To form a circuit for detecting the load fluctuation by detecting the current in a load switching circuit and changing a frequency to change a load.
CONSTITUTION: A load 2 and a switch 3 are serially connected to an electric power source 1. A current detecting transformer 4 for detecting the current of the main circuit is connected. The output of the transformer 4 is converted into a detecting signal by a signal detector 5, and inputted to a comparator 6 for comparing the detecting signal with a reference value 7. The comparator 6 transmits both outputs responding to the normal operation and the operation at fluctuation of load to a frequency controller 8, which supplies a control signal to the switch 3. Switching is executed at a frequency f
1 for the normal operation and at a frequency f
2 for the operation at fluctuation of the load. Thus, the load fluctuation is detected without causing the drop of a voltage, with simple circuit, and the circuit is made small in size.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过检测负载切换电路中的电流并改变频率来改变负载，形成用于检测负载波动的电路。构成：负载2和开关3串联连接到电源1.连接用于检测主电路电流的电流检测变压器4。变压器4的输出由信号检测器5转换成检测信号，并输入到比较器6，用于将检测信号与参考值7进行比较。比较器6根据正常操作和操作向开关3提供控制信号的频率控制器8的负载变动。在正常工作的频率f1和负载变动的动作的频率f2下进行切换。因此，通过简单的电路检测负载波动而不引起电压下降，并且使电路尺寸变小。

3. 发明专利

JPH03280615A PULSE CURRENT GENERATOR AND DEGREE OF VACUUM MEASURING INSTRUMENT FOR VACUUM BULB FOR VACUUM INTERRUPTER 失效
公开(公告)号：JPH03280615A
公开(公告)日：1991-12-11
申请号：JP8169790
申请日：1990-03-29
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHIDA HIROSHI , SUZUKI BUNJI , YAMAMOTO SHIGERU , KANAZAWA TORU , KOGUCHI YOSHIO
IPC分类号： G01L21/00 , H03K3/53
摘要： PURPOSE:To generate a large pulse current whose width is variable by generat ing sequentially a pulse from plural pulse generating circuits each filter element consists of coils and capacitors. CONSTITUTION:The generator is provided with plural pulse generating circuits PG1-PGn each comprising multi-stages of filter elements consisting of coils L1-Ln and capacitors C1-Cn and plural switching means SW1-SWn switching circuits tying a load and outputs of the pulse generating circuits PG1-PGn. More over, a switching drive means is provided, which opens all the switching means SW1-SWn and closes them sequentially, the input of the pulse generating circuits PG1-PGn is connected respectively to a DC power supply 10 and the outputs of the pulse generating circuits PG1-PGn are connected to the load 12 via the switching means SW1-SWn. Thus, a large pulse current with an optional pulse width is generated.

4. 发明专利

JPH0322817A DISCHARGE DETECTING CIRCUIT FOR HIGH VOLTAGE POWER SOURCE 失效
公开(公告)号：JPH0322817A
公开(公告)日：1991-01-31
申请号：JP15458589
申请日：1989-06-19
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KANAZAWA TORU , YAMAMOTO SHIGERU , TOUDA MITSUKUNI
IPC分类号： H02H3/12 , H02H7/00 , H02K7/06 , H02M3/28
摘要： PURPOSE:To inform abnormality of load to the outside by detecting electrical variation at the side of input circuit through a circuit having high voltage generating section upon occurrence of abnormality of load then stopping following discharge phenomenon through utilization of detected signal. CONSTITUTION:Upon occurrence of abnormality in a load, oscillation of ternary winding L3 stops. At this time, voltage to be produced from a current transformer 27 also drops thus lowering the potential at a terminal 32 connected with a comparator 17. When the potential at the terminal 32 drops below the potential at a terminal 43, output from the comparator 17 is inverted and the current flow is deflected from the base terminal 49 to the output of the comparator 17. Consequently, a transistor 38 is disabled and a conduction signal is fed to the gate terminal 39 of a stop thyristor 36 thus conducting the stop thyristor 36. When the stop thyristor 36 conducts, a light emission diode is lighted to inform the abnormality.

5. 发明专利

JPH10289799A POWER SUPPLY DEVICE AND ACCELERATOR 失效
公开(公告)号：JPH10289799A
公开(公告)日：1998-10-27
申请号：JP9555797
申请日：1997-04-14
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KANAZAWA TORU , KUBO HIROSHI
IPC分类号： H05H7/04
摘要： PROBLEM TO BE SOLVED: To eliminate external adjustments for a power application start signal, a current-setting value or the like by forming a power supply for operation, in matching with a current setting value via a timing setting unit installed within the power supply itself. SOLUTION: A current-setting value Ir is preliminarily sent from a setting device 7 to a current instruction unit 2. When a power supply start signal (s) is sent from a timing generation device 8, a power supply start signal Sn for a power supply is outputted, and a current-setting value Ir is outputted from the current instruction unit 2 to a power supply control part 4. In addition, the power supply control part 4 sends output current Id to a load 9, according to the current-setting value Ir. An output current Id is detected with a current detector 5, and compared with the current setting value Ir in a deviation detector 6 for the calculation of a deviation ε. The deviation ε is fed back to the power supply control part 4, and control is made so that the output current Id approaches close to the current setting value Ir. Also, a deviation εcorresponding to a delay in the load 9 and the power supply control part 4, relative to the current-setting value Ir, is connected to the timing setting unit 3, thereby converting the deviation ε with time for quickly outputting the power supply start signal Sn for the power supply.

6. 发明专利

JPH04204068A APPARATUS FOR TESTING SWITCH 失效
公开(公告)号：JPH04204068A
公开(公告)日：1992-07-24
申请号：JP32922290
申请日：1990-11-30
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KANAZAWA TORU , MIZUKOSHI AKIO , KAWASAKI YOSHIO , OHASHI TSUNEYOSHI
IPC分类号： G01R31/327 , G01R31/333 , H01H69/00
摘要： PURPOSE:To efficiently apply load duty to a breaker and to prevent the generation of erroneous operation due to noise by combining individual units each consisting of a power supply detection circuit, a delay circuit and a load state detection circuit and controlling the same in a cooperative state. CONSTITUTION:The start signal from a test starting apparatus 7 is detected by a test start signal detection circuit 8 to be applied to a power supply detection circuit 9 detecting a power supply state. The power supply detection circuit 9 judges whether a main power supply 1 is matched with the application condition prescribed to a switch to be tested and, when the power supply 1 reaches said condition, a control switch 2 is closed. Subsequently, the separate start signal of the test starting apparatus 7 is detected by a detection circuit 10 to be applied to a delay circuit 11 and the switch 3 to be tested is closed at a predetermined time and the duty set based on the application condition is applied to the switch 3. A load state is detected by a load state detection circuit 13 and each unit is insulated by optical connection and a tester is isolated from noise.

7. 发明专利

JPH01157271A SEMICONDUCTOR DEVICE 失效
公开(公告)号：JPH01157271A
公开(公告)日：1989-06-20
申请号：JP31200687
申请日：1987-12-11
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KANAZAWA TORU , YAMAMOTO SHIGERU
IPC分类号： H02M3/28
摘要： PURPOSE:To reduce the number of components and improve stabilizing accuracy, by a method wherein a starting circuit and a starting switch circuit are provided to separate a frequency and a duty setting mode upon starting from the same upon stabilizing operation. CONSTITUTION:An inputted AC voltage is rectified and smoothed by a rectifier circuit 2 and a capacitor 3. When a main switch 60 is thrown, a DC voltage is impressed on a starting circuit 61, a starting switch circuit 62 is being put ON for some period of time and a control voltage is supplied from a terminal 55 to the signal setting terminal 64 of a control circuit 63, generating a signal determining the frequency and the duty of a switching circuit 4. Accordingly, a control signal 66 is determined by the impressing voltage of said terminal 65 during starting the starting circuit 61 and the induced voltages of secondary and tertiary windings 5b, 5c are outputted after rectifying and smoothing them by rectifying and smoothing circuits 68, 69. The smoothing output 69 is impressed on the setting terminal 64 and the starting circuit 61 puts the starting switch circuit 62 ON after a predetermined time constant whereby only said output 69 is impressed on the setting terminal 64.

8. 发明专利

JPS63318814A MALFUNCTION PREVENTING CIRCUIT FOR SEMICONDUCTOR ELEMENT 失效
公开(公告)号：JPS63318814A
公开(公告)日：1988-12-27
申请号：JP15330987
申请日：1987-06-22
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KANAZAWA TORU , YAMAMOTO SHIGERU , KOGUCHI YOSHIO , YUSA YUKIE
IPC分类号： H03K17/73 , H03K17/16
摘要： PURPOSE:To improve the voltage rise tolerance of a semiconductor three- terminal element and to prevent the noises mixed through a signal line, by securing the connection between control terminals via the short circuit or a specific impedance when the noise is applied. CONSTITUTION:The DC voltage 22 is connected in the solid line direction of a switch 23 and the voltage is applied to a capacitor 24 to be used as a supply source for pulse voltage. The switch 23 is opened when the application is through with said voltage. In this case, an SCR1a is controlled by a control signal 25 and the DC voltage controlled by the signal 25 is applied to a load 20. Then a switch 26 is applied for application of the pulse voltage to the load 20. While the pulse voltage having a sharp rising rate is applied to an SCR1b connected antiparallel. At the same time, the noises are transmitted via a signal line in response to the discharge of the capacitor 24. Thus the SCR1b has a malfunction. In this case, a switch 26 is short-circuited with both switches 7b and 8b opened respectively. Thus it is possible to cope with the pulse voltage having a sharp rising rate and the mixture of noises. Then the malfunction of the SCR1b can be avoided.

9. 发明专利

JPS61293156A LOAD SWITCHING CIRCUIT 失效
公开(公告)号：JPS61293156A
公开(公告)日：1986-12-23
申请号：JP13415485
申请日：1985-06-21
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KANAZAWA TORU , YAMAMOTO SHIGERU
IPC分类号： H02M1/06
摘要： PURPOSE:To enable multiple parallel loads including a flip-flop circuit to be driven by removing the commutation circuit of load switching circuit of a thyristor and giving optimal control signals. CONSTITUTION:When a control signal 41 turns positive and a control signal 42 zero, a control transistor 35 impressed with the positive control signal is switched on and a conducting transistor 43 comes off. As a result a thyristor of gate-turn-off type (GTO) 27 begins to cut off. On the other hand, as the control signal 42 turns zero, a control transistor 36 is switched off and a cutoff transistor 38 as well. Thus GTO 28 starts to transfer to conduction and the loading current flows. Again, when the control signal 41 turns zero and the control signal 42 positive, the load alternative switching can be performed by repeating the above-mentioned operation.

10. 发明专利

JP2006093752A Imaging apparatus 审中-公开
标题翻译：成像设备
公开(公告)号：JP2006093752A
公开(公告)日：2006-04-06
申请号：JP2004272688
申请日：2004-09-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KANAZAWA TORU
IPC分类号： H04N5/232 , H04N5/235 , H04N5/92
摘要： PROBLEM TO BE SOLVED: To provide an imaging apparatus in which deterioration in image quality, e.g. block distortion and mosquito distortion, is suppressed.
SOLUTION: A variation detecting means 13 in a microprocessor 9 detects the stop value every unit time through a stop detection circuit 4 and monitors variation in stop value per unit time at all times. When variation in stop value per unit time exceeds a predetermined level due to abrupt change in illumination conditions, the microprocessor 9 controls an encoding compression circuit 10 to increase encoding rate in order to deal with the volume of video information increased through change in conditions. Consequently, missing or reduction in volume of information is lessened at the time of reproduction and deterioration in image quality, e.g. block distortion and mosquito distortion, can be suppressed.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种成像装置，其中图像质量的劣化，例如，阻塞失真和蚊子失真被抑制。解决方案：微处理器9中的变化检测装置13通过停止检测电路4每单位时间检测停止值，并且一直监视每单位时间停止值的变化。当由于照明条件的突然变化，每单位时间的停止值的变化超过预定水平时，微处理器9控制编码压缩电路10以提高编码率，以便处理通过条件改变而增加的视频信息量。因此，在再现时减少信息量的减少或图像质量的劣化，例如，块变形和蚊子变形，可以抑制。版权所有（C）2006，JPO＆NCIPI

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