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1. 发明专利

JPS62102358A QUESTIONNAIRE COLLECTING DEVICE 失效
公开(公告)号：JPS62102358A
公开(公告)日：1987-05-12
申请号：JP24154185
申请日：1985-10-30
申请人： NICHIREI KK , HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHIBASHI KENJI , HIDA KIYOSHI , SUZUKI TSUTOMU , UMETSU HIDEYASU , NASU SEIJI
IPC分类号： G06F17/40 , G06Q50/00 , G06Q50/10 , G06Q50/34
摘要： PURPOSE:To judge he reliability of an answer by checking the rationality of a combination of keys which are pressed at the time of answering to a questionnaire. CONSTITUTION:Keys Q1-Q5 for question items 30 and keys A11-A15 and A51-A55 for answer items 31 are arrayed on the questionnaire answer keyboard 21 of a questionnaire collecting terminal 10. Then, an irrational combination of answer keys, e.g. keys A11-A21 is displayed 13 with the ten-key 50 of a setter 11. Consequently, the reliability of a questionnaire answer to key input is judged, so a reliable questionnaire result is obtained.

2. 发明专利

JPS62102273A QUESTIONAIRE COLLECTOR 失效
公开(公告)号：JPS62102273A
公开(公告)日：1987-05-12
申请号：JP24154285
申请日：1985-10-30
申请人： NICHIREI KK , HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHIBASHI KENJI , HIDA KIYOSHI , SUZUKI TSUTOMU , UMETSU HIDEYASU , NASU SEIJI
IPC分类号： G09B7/06 , G06F17/40

3. 发明专利

JPH10155276A POWER CONVERSION EQUIPMENT 失效
公开(公告)号：JPH10155276A
公开(公告)日：1998-06-09
申请号：JP30899196
申请日：1996-11-20
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KANOUDA TAMAHIKO , SAKURAI YOSHIMI , KUBO KENJI , UMETSU HIDEYASU , KUNISADA HIDEAKI , SHIMADA KEIZO , NAKANE TAKAYASU
IPC分类号： G01R29/18 , H02M5/458 , H02M7/12 , H02M7/155 , H02M7/219 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To make easier confirmation of power supply connection when installing a power conversion equipment, by providing means for judging the phase sequence and power conduction or power interruption within a power conversion equipment. SOLUTION: A three-phase AC power supply 1 has U, V, and W phases, voltage detection means 2a is located between U and V, voltage detection means 2b is connected between W and V, and outputs from these are connected to a power supply state computing element 4. And the output of Vq computing element 5 possessed by a power supply state computing element 4 is inputted to a state judging means 6 of a power supply and its output is connected to a power conversion equipment 39. If Vq is a constant value, then the phase sequence of the three-phase AC power supply 1 is in the order of U phase →V phase → W phase. If Vq is a sine wave form where the positive and negative wave heights are equal, then the phase sequence is in the order of U phase → W phase → V phase, and if the Vq vibrates in a sine wave form with positive and negative values, with a positive offset, then the U phase or W phase is considered to be grounded and thus handled as a power interruption state.

4. 发明专利

JPS5914293A Temperature controller for induction heating vacuum melting furnace 失效
标题翻译：用于感应加热真空熔融炉的温度控制器
公开(公告)号：JPS5914293A
公开(公告)日：1984-01-25
申请号：JP12207582
申请日：1982-07-15
申请人： Hitachi Ltd , Hitachi Eng Co Ltd
发明人： SATOU MASAKI , UMETSU HIDEYASU
IPC分类号： H05B6/26 , G05D23/19

5. 发明专利

JPS58130795A POWER SOURCE FOR DRIVING AC MOTOR 失效
公开(公告)号：JPS58130795A
公开(公告)日：1983-08-04
申请号：JP1005882
申请日：1982-01-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MAEDA TAKEO , UMETSU HIDEYASU , TAKAHASHI NORIYOSHI
IPC分类号： H02P27/06 , H02P21/18 , H02P21/24 , H02P21/34 , H02P23/16 , H02P25/02
摘要： PURPOSE:To again accelerate the speed of a motor in the state likewise the synchronous state by detecting the rotating speed from the induced voltage of the motor and setting the output voltage and frequency of the drive device at the redriving time to values slightly larger than the detected values. CONSTITUTION:When a power interruption is recovered, an arithmetic circuit 24 is completely prepared by the output of a power receiving side detector 8. On the other hand, the voltage component of the induced voltage detector 7 at the motor 6 side is applied to a comparator 12, and the frequency component is applied by a detector 21 to an arithmetic circuit 24. These voltage and frequency are corrected by the circuit 24, are applied through a voltage setter 22 and a frequency setter 23 to a pulse generating and forming circuit 10, and is restarted with an acceleration pattern adapted at the restarting time.

6. 发明专利

JPS58130790A DRIVE DEVICE FOR MOTOR 失效
公开(公告)号：JPS58130790A
公开(公告)日：1983-08-04
申请号：JP1005482
申请日：1982-01-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MAEDA TAKEO , UMETSU HIDEYASU , ARAI KEIJI
IPC分类号： H02P27/06 , H02P3/24
摘要： PURPOSE:To perform an operation of a motor with high reliability by detecting the induced voltage of the motor, thereby measuring the accurate rotating speed of the motor. CONSTITUTION:When a DC braking is performed, the specific switch element of a power inverter 4 is continuously energized. When AC excitation is stopped by stopping the output of a pulse amplifier 9, the induced voltage of frequency corresponding to the rotating speed at that time is presented at the terminal of the motor. The induced voltage is inputted through a voltage detector 10 and an output interface 22 to an arithmetic controller 23, thereby measuring the rotating speed of the motor and storing it in a memory cell. The data in the memory cell is applied to a rotating speed indicator 26 and is indicated externally. The measurement of the rotating speed is programmably performed in the controller 23, but in some cases, an instruction is applied manually to a measuring operation unit 25, thereby performing the series of operations from the stop of the brake current to the reenergization via the controller 23.

7. 发明专利

JPS5250525A PULSE WIDTH CONTROLLED INVERTOR REGULATOR 失效
公开(公告)号：JPS5250525A
公开(公告)日：1977-04-22
申请号：JP12545575
申请日：1975-10-20
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YAMAZAKI YASUHIRO , UMETSU HIDEYASU
IPC分类号： H02M7/48
摘要： PURPOSE:To stabilize the transient response characteristics by a decision of the phase control angle by means of making a comparison of the signal rectified from the signal obtained by integrating the output signal of the oscillator with the control voltage fed-back from the output voltage.

8. 发明专利

JPH01214269A INVERTER DEVICE 失效
公开(公告)号：JPH01214269A
公开(公告)日：1989-08-28
申请号：JP3739688
申请日：1988-02-22
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHIDA ISATO , UMETSU HIDEYASU
IPC分类号： H02M1/00 , H02M7/48
摘要： PURPOSE:To protect elements against damage, by blocking excessive current flow in the reverse recovery of flywheel diodes with a reactor and by absorbing the surge voltage of the reactor with a capacitor. CONSTITUTION:An inverter device is composed of a DC power source 1, self- breaking elements 11-12 and 21-22, flywheel diodes 13-14 and 23-24, reactors 15 and 25, capacitors 16 and 26 and diodes for feedback 18 and 28, etc. On this occasion, in the self-breaking elements 11-12 having short switching time, especially in those having switching time not shorter than the reverse recovery time of the diodes 13-14, excessive current flows at the very moment to give damage on the elements. With the above reactor 15, therefore, the excessive current is reduced to suppress the peak value of the current. Further, the surge voltage is so absorbed with the diode 17 and the capacitor 16 connected in parallel to the element 12 that the peak value of the surge voltage is suppressed.

9. 发明专利

JPS58130797A FREQUENCY CONVERTER 失效
公开(公告)号：JPS58130797A
公开(公告)日：1983-08-04
申请号：JP1005382
申请日：1982-01-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MAEDA TAKEO , UMETSU HIDEYASU , TAKAHASHI NORIYOSHI
IPC分类号： H02M5/45 , H02P5/74
摘要： PURPOSE:To early detect the variation in the characteristics or deterioration of an element and a motor in an apparatus by comparing the operating data measured during the operation of the motor with the initial value stored in advance. CONSTITUTION:The drive device of a motor 59 has an AC power source 1, a rectifier 52, a DC smoothing filters 53, 54, and a DC/AC converter 56. The converter 56 is controlled by a control memory 64 which has memory cells and arithmetic elements. The data when a motor 59 is normally operated are stored in a memory 65, the operating data measured during the later operation and the initial values stored in the memory 64 are compared, thereby detecting the variation in the characteristics or deterioration of the element and the motor 59 in the apparatus.

10. 发明专利

JPS5722874A Power source device for arc welder 失效
标题翻译：电弧焊机用电源装置
公开(公告)号：JPS5722874A
公开(公告)日：1982-02-05
申请号：JP9503380
申请日：1980-07-14
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： UMETSU HIDEYASU , TAKAHASHI TSUYOSHI
IPC分类号： B23K9/073 , B23K9/06 , B23K9/09 , G05F1/02
摘要： PURPOSE: To obtain a power source device of low-price, high efficiency and high reliability by converting a current from a DC power source which is of high voltage and small current used for a two-electrode, system arc welder into an AC through an inverter, converting this AC into a low voltage and a large current through a transformer and rectifying this current, then applying it to electrodes.
CONSTITUTION: A constant-current from a controllable DC power source 26 is converted into an AC through an inverter 30 and this AC is dropped to an arbitrary voltage through a transformer 34. An obtained AC is applied to electrodes 42, 44 of a welder through rectifiers 38, 40. Voltage waveform at each part among AWE is as shown in figures, and pulse like arbitrary voltages having O-current intervals at an arbitrary frequency are made to apply between the electrodes 42, 44 and a base material 46. By said constitution, the current capacity of the inverter 30 is put up with a small one, the multiplicity of transistors and the like which are used is made less and the capacitors 32, 36 are allowed to be in a small size. Further, low-priced ready-made rectifiers are possibly used for the rectifier 38, 40.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：通过将来自用于双电极系统电弧焊机的高电压和小电流的直流电源的电流转换成AC，从而获得低价格，高效率和高可靠性的电源装置逆变器，通过变压器将该交流电转换成低电压和大电流，并对该电流进行整流，然后将其施加到电极。构成：通过逆变器30将来自可控直流电源26的恒定电流转换为AC，并且该AC通过变压器34下降到任意电压。获得的AC被施加到焊机的电极42,44通过整流器38,40，AE中的各部分的电压波形如图所示，在电极42,44和基材46之间施加具有任意频率的O电流间隔的任意电压的脉冲。由上述结构中，逆变器30的电流容量小，所使用的多个晶体管等减少，并且电容器32,36被允许为小尺寸。此外，低成本的现成整流器可能用于整流器38,40。

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