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    • 3. 发明专利
    • Controller for thyristor converter
    • 控制器用于转换器
    • JPS58217026A
    • 1983-12-16
    • JP9919182
    • 1982-06-11
    • Hitachi Eng Co LtdHitachi Ltd
    • SUZUKI SHIYOUJIKODAMA YUKINORI
    • G05F1/10H02M7/515H02M7/757
    • H02M7/757
    • PURPOSE:To control a load current at a high speed and with high precision, by employing an actual circulating current as a circulating current command added to a load current command. CONSTITUTION:The load current command 104(A) is inverted by a signal inversion part 31 into a pattern (B) and the circulating current command 106(C) is applied to the 1st and the 2nd thyristor converters, respectively. Then when they flow a current (D) to a load and further flow the circulating current (E), detected currents 100 and 102 are obtained from a current detector. Those detected currents 100 and 102 are applied to an adder 32 by switching the current (E) by a switching part 40 at times T1-T2. This current (E) flows on the basis of the circulating current command 106(C) and includes the delay of the system, etc., so the current command is added to the load current command 104(A) to obtain a command signal (D) of a forward side. Consequently, current control conforming to the load current command 104 and circulating current command 106 is performed at the high speed and with the high precision.
    • 目的:通过采用实际循环电流作为加载电流指令的循环电流指令,高速,高精度地控制负载电流。 构成:负载电流指令104(A)由信号反转部分31反转为模式(B),循环电流指令106(C)分别施加到第一和第二晶闸管转换器。 然后当它们将电流(D)流向负载并进一步流过循环电流(E)时,从电流检测器获得检测电流100和102。 那些检测电流100和102通过在时间T1-T2由开关部分40切换电流(E)而被加到加法器32。 该电流(E)基于循环电流指令106(C)流动并且包括系统的延迟等,因此电流指令被加到负载电流指令104(A)以获得指令信号 D)前方。 因此,以高速和高精度进行符合负载电流指令104和循环电流指令106的电流控制。
    • 5. 发明专利
    • Feed forward control system
    • 进给前进控制系统
    • JPS5743202A
    • 1982-03-11
    • JP11704980
    • 1980-08-27
    • Hitachi LtdJapan Atom Energy Res Inst
    • OGATA ATSUSHIMATSUO SATOSHIMURAI KATSUJIKODAMA YUKINORI
    • G05B11/32G05B5/01
    • G05B5/01
    • PURPOSE:To compensate and control variation caused by an uncertain causes, by fetching an accmpanied phenomonon with an incidental abnormal phenomenon in real time, obtaining the delay time and compensating amount based on the correlation with the deviation of status amount of said data and the abnormal phenomenon, and giving correction. CONSTITUTION:The state amount of an accompanied phenomenon 6 appeared ahead an abnormal phenomenon is fetched with a detector 7, and based on the correlation with the deviation of state amount caused to the control variable due to abnormal phenomenon, the amount to be compensated via a compensation amount and delay time operation block 8, and the delay time for the compensation control in coincidence with the time delay until an abnormal phenomenon is actually appeared from the production of uncertain causes, can be obtained. The result is realized by a delay circuit 9, summing point 10 and controller 2, the status amount deviation due to abnormal phenomenon is cancelled for the output of the controller to keep the balancing of the control variable.
    • 目的:为了补偿和控制由不确定因素引起的变化,通过实时发现附带异常现象,获得延迟时间和补偿量,根据与所述数据的状态量的偏差的相关性和异常 现象,给予纠正。 构成:伴随现象6的状态量出现在检测器7之前的异常现象之前,并且基于由于异常现象引起的与控制变量的状态量的偏差的相关性,通过a 补偿量和延迟时间操作块8,并且可以获得与不确定原因的产生实际出现异常现象的时间延迟一致的补偿控制的延迟时间。 结果由延迟电路9,求和点10和控制器2实现,由于异常现象引起的状态量偏差被取消,控制器的输出保持控制变量的平衡。
    • 6. 发明专利
    • PARALLEL CONNECTED POLYPHASE THYRISTOR POWER SUPPLY CONTROLLING DEVICE
    • JPS58163265A
    • 1983-09-28
    • JP4458282
    • 1982-03-23
    • HITACHI LTD
    • KODAMA YUKINORI
    • H02M1/08H02M1/084
    • PURPOSE:To prevent the unbalanced current flowing to the group in parallel as well as to perform a high degree of excellent control over the current by a method wherein the characteristic difference of a phase controlling circuit and a thyristor converter is controlled by performing a correction. CONSTITUTION:The current running on thyristor converters 2 and 3 and a load coil 1 is detected by DCCT (transformer for converter) 6, 14 and 15, and the result is inputted to a controller 13. The output of the DCCT6 is level-converted to one half by a level converter 16, and after the above has been compared with the output of DCCT14 and 15, the result is given to amplifiers 19 and 20. This value becomes the correction value to be used to correct the characteristic difference of the phase controlling circuits 11 and 12. On the other hand, the current of the load coil is compared with the reference value to be set by the potentiometer 8 through the intermediary of a level converter 7. The deviation of the above is inputted to an amplifier 9 and an arithmetic operational unit, and the amount of operation of the phase controlling circuits 11 and 12 is determined.
    • 8. 发明专利
    • WIDEERANGE TEMPERATURE MEASURING DEVICE
    • JPS5677732A
    • 1981-06-26
    • JP15441479
    • 1979-11-30
    • HITACHI LTD
    • KODAMA YUKINORIMURAI KATSUJIMATSUO SATOSHI
    • G01K7/24G01K7/20G01R27/08
    • PURPOSE:To ensure a continuous measurement of temperature over a wide range, by switching several temperature measuring resistors according to the temperature to be measured and at the same time giving an adjustment to the current supplied to the temperature measuring resistances. CONSTITUTION:The current is supplied to the standard resistance 1 as well as the temperature measuring resistances A, B and C each from the constant current source 3. The terminal voltage of the resistance 1 and a temperature measuring resistance selected by the selector 2 is supplied to the multiplexer 8 via the amplifiers 5 and 6. Each output voltage receives an alternate A/D conversion 9 to be sent to the arithmetic processor 10. The processor 10 delivers the selection signal to the selector 2 and at the same time calculates the extent of operation to give a linear correction to the region of the temperature to be measured to supply the extent of operation to the D/A converter 11. The motor 13 is turned by the output of the converter 11 to control the variable resistance 14. Thus the current flowing to the temperature measuring resistance is varied. The temperature of the resistance is displayed at the display devices 7 and 15 in an analog way and digital way respectively.