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31. 发明专利

JPS545183A PUMP NUMBER CONTROLLER 失效
公开(公告)号：JPS545183A
公开(公告)日：1979-01-16
申请号：JP6987677
申请日：1977-06-15
申请人： HITACHI LTD
发明人： SEKIYAMA YOSHIO
IPC分类号： F04B49/06 , F04B49/00 , G05B11/18 , G05D16/00 , G05D16/20
摘要： PURPOSE:To prevent the overshooting in the velocity of a plurality of pumps when a plurality of pumps are started by following-up by means of adding a velocity deviation signal of a following up pump preveiously to a velocity command signal of a pump to be followed up via a diode.

32. 发明专利

JPS5343821A CONTROLLING FOR DIRECT CURRENT MOTOR 失效
公开(公告)号：JPS5343821A
公开(公告)日：1978-04-20
申请号：JP11722876
申请日：1976-10-01
申请人： HITACHI LTD
发明人： SEKIYAMA YOSHIO , KATOU EINOSUKE
IPC分类号： H02P3/12
摘要： PURPOSE:To lighten a shock of a braking time, by decreasing a field currrent at a starting time of a dynamic braking.

33. 发明专利

JPS52107678A DUST PROTECTING DEVICE FOR MACHINERY HOUSING CABINET 失效
公开(公告)号：JPS52107678A
公开(公告)日：1977-09-09
申请号：JP2318676
申请日：1976-03-05
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： GOTOU HIROSHI , KAGAYA SATORU , SAITOU KATSUSUKE , SEKIYAMA YOSHIO , KATOU EINOSUKE , YAMADA SHIGEO
IPC分类号： B01D46/10 , B01D46/00 , H02B1/28
摘要： PURPOSE:To provide a machinery-housing cabinet with a dustprotecting device designed with sufficient dust-protecting and humidity-removing effects.

34. 发明专利

JP2001085879A ASSEMBLING STRUCTURE OF ELECTRONIC CIRCUIT BOARD 失效
公开(公告)号：JP2001085879A
公开(公告)日：2001-03-30
申请号：JP25840599
申请日：1999-09-13
申请人： HITACHI LTD
发明人： SARUTA TAKAHIRO , SEKIYAMA YOSHIO , FUJISAKI TAKASHI , SATO MAMORU , KATO EINOSUKE
IPC分类号： H05K9/00 , H05K7/14 , H05K7/20
摘要： PROBLEM TO BE SOLVED: To transfer heat to the outside without using forcible cooling means and miniaturize a casing for housing an electronic circuit. SOLUTION: In a casing 1a for housing an electronic circuit board on which electronic components are mounted and a cover 1b thereof, a plurality of printed boards 2a, 2b,..., 2n are brought into surface contact with substrate inserting grooves 3a, 3b,..., 3n provided in the casing 1a, so that heat generated from the electronic components mounted on the electronic circuit board is transferred to the casing through the substrate inserting grooves. Preferably, in order to dissipate heat generated in the easing 1a, the electronic circuit board is constituted by a structure in which a heat sink 2a-1 and an insulating printed board 2a-2 are laminated and integrally molded. Heat generating bodies 4 such as the electronic components or the like are mounted on the heat sink and brought into heat conduction contact so that the heat is transferred from the electronic components to the heat sink.

35. 发明专利

JP2001053462A CABINET FOR HOUSING ELECTRONIC COMPONENT 失效
公开(公告)号：JP2001053462A
公开(公告)日：2001-02-23
申请号：JP22760399
申请日：1999-08-11
申请人： HITACHI LTD , HITACHI PROCESS COMPUTER ENG
发明人： NAMIKI YASUYUKI , WATANABE MASAHIKO , SEKIYAMA YOSHIO , SUZUKI HIROSHI , ESATO KOJI , MINOWA SHIGERU
IPC分类号： H05K5/03
摘要： PROBLEM TO BE SOLVED: To provide a cabinet for housing electronic component, which can surely conduct locking of a cover opening and closing of it, and is easy to have the cover opened and closed. SOLUTION: A fixed plate 9, provided vertically movably on an opening - closing operating plate 6, is moved vertically by an operation button 5 and fitted into a lock groove 11b of a cover 1 to lock the operating plate 6 from moving transversally, and a fixed pin attached to a cabinet 10 is fitted into a lock fixture which is attached to the cover 1 and interlocked with the transversal movement of the opening - closing operating plate 6 to lock the cover 1 from vertically moving, thus forming a double lock structure.

36. 发明专利

JPH06201813A METHOD AND DEVICE FOR ORIENTING POSITION OF TRAVELING BODY 失效
公开(公告)号：JPH06201813A
公开(公告)日：1994-07-22
申请号：JP34903292
申请日：1992-12-28
申请人： HITACHI LTD
发明人： FUJINAGA MASAKI , HIROKI TAKESHI , SEKIYAMA YOSHIO , KODAIRA TAKATOSHI , FUJIWARA KAZUNORI , KIKUCHI MASARU , MURASE YOSHIO
IPC分类号： G01S5/14 , G01S19/14 , G01S19/49 , G01S19/51 , G08G5/00 , H04B7/26 , H04W64/00
摘要： PURPOSE:To orient an absolute position while maintaining estimation of an accurate relative position relationship by providing one reference fixed station even if an absolute position detection means such as GPS is not available when a plurality of traveling bodies exist. CONSTITUTION:The position orienting device of a traveling body consists of a vector detection means 212, a reference fixed station 103, a range-finding/ communication means 104, an error estimation means 105, an absolute position detection means 106, a traveling body position orienting means 107, and an altitude detection means 213. An absolute position is calculated by the absolute position detection means 106 using distance information between the reference fixed station 103 and each of a plurality of traveling bodies and among a plurality of traveling bodies, position information from the vector detection means 212, and altitude information from the altitude detection means 213, error is estimated by the error estimation means 105 using the same information, and then the absolute position calculation value and the error estimation value are synthesized by the traveling body position orienting means 107, thus estimating the absolute positions of a plurality of traveling bodies.

37. 发明专利

JPH01165974A POWER CONVERTER 失效
公开(公告)号：JPH01165974A
公开(公告)日：1989-06-29
申请号：JP32404787
申请日：1987-12-23
申请人： HITACHI LTD
发明人： ONODERA TORU , SEKIYAMA YOSHIO
IPC分类号： G01R31/00
摘要： PURPOSE:To enable the reliable detection of deterioration of a smoothing capacitor without removing the capacitor, by detecting directly a charging/discharging current flowing through the capacitor provided between an AC/DC converter and a DC/AC converter and by comparing a detected value with a value at a normal time. CONSTITUTION:A smoothing capacitor 3 is provided between an AC/DC converter 1 and a DC/AC converter 2. The AC/DC converter 1 and the DC/AC converter 2 are controlled by a control device 8 so that the opposite end voltage of the capacitor 3 and an output voltage of the DC/AC converter 1 be in accord with a voltage instruction, and thereby the power running and regenerative control of a motor load are conducted. A current transformer 7 being connected in series to the capacitor 3, a charging/discharging current of the capacitor 3 is detected and a detection signal thereof is inputted to a current comparator circuit 10. Meanwhile, a current setting unit 11 provided separately outputs to the circuit 10 a pattern of the charging/ discharging current of the capacitor 3 at a normal time. Comparing this charging/ discharging current pattern with a detected value of the charging/discharging current of the capacitor 3, the circuit 10 judges the capacitor 3 deteriorated when a deviation value thereof exceeds a prescribed value, and delivers an output.

38. 发明专利

JPS62281763A CONTROLLER FOR VARIABLE POWER SOURCE 失效
公开(公告)号：JPS62281763A
公开(公告)日：1987-12-07
申请号：JP12360586
申请日：1986-05-30
申请人： HITACHI LTD
发明人： SEKIYAMA YOSHIO
IPC分类号： H02P7/292 , H02M7/12 , H02M7/17
摘要： PURPOSE:To increase a responding speed of the title power source, by having current command signal in current control system and current command signal on the main system side, in common, and by using both signals on the self and main system sides, as current feedback signal. CONSTITUTION:Through a transformer 1 from an AC power source, a motor 3 is driving-controlled by variable power controllers A, B in the main system and the auxiliary system of converters 2, 21 arranged in parallel with each other. On the main system side A, the controller is composed of a current transformer 4, an output voltage detector 5, a current control circuit 8, a voltage control circuit 9, and the like, and is worked on a steady state. The auxiliary system side B is provided with a current transformer 22 and a current control circuit 24, and in place of a voltage control circuit, current command signal lp on the main system side A is used, and current detecting signal IF on the main system side A is used, and these signals are directed to an arithmetic unit 27 for input. Then, the auxiliary system side B is automatically worked just on the lowering of AC power voltage, and so the uneconomical property of a transformer capacity can be eliminated.

39. 发明专利

JPS5932393A Control circuit for induction motor 失效
标题翻译：电感电机控制电路
公开(公告)号：JPS5932393A
公开(公告)日：1984-02-21
申请号：JP13987982
申请日：1982-08-13
申请人： Hitachi Ltd
发明人： SEKIYAMA YOSHIO
IPC分类号： H02P25/04 , H02P27/02
摘要： PURPOSE:To discriminate a trouble mode of a thyristor switch on trouble, and to control the stoppage of the motor in consideration of the whole system by providing a current voltage detector. CONSTITUTION:A voltage commutation circuit 15 is connected to the thyristor switches 3, 4, 5, and the complete state of a short circuit is detected by detecting relays A1, A2, A3. On the other hand, the state in which detecting voltage exceeds the predetermined drop voltage of forward voltage is detected by a comparator 18 and detecting relays B1, B2, B3. The conduction or non-conduction of currents is detected by current detectors 9, 10, 11, a comparator 21 and detecting relays C1, C2, C3. The thyristor switches interrupt a gate by each trouble mode through the operation of the detecting relays A1, A2, A3, B1, B2, B3, C1, C2, C3.
摘要翻译：目的：通过提供电流电压检测器来鉴别晶闸管开关的故障模式，并考虑整个系统来控制电机的停止。构成：电压换向电路15连接到晶闸管开关3,4,5，并且通过检测继电器A1，A2，A3来检测短路的完整状态。另一方面，检测电压超过正向电压的预定下降电压的状态由比较器18检测并检测继电器B1，B2，B3。电流的导通或不导通由电流检测器9,10,11，比较器21和检测继电器C1，C2，C3检测。通过检测继电器A1，A2，A3，B1，B2，B3，C1，C2，C3的操作，晶闸管开关通过每个故障模式中断门。

40. 发明专利

JPS5886897A OPERATION SWITCHING CONTROLLING METHOD FOR MOTOR 失效
公开(公告)号：JPS5886897A
公开(公告)日：1983-05-24
申请号：JP18379381
申请日：1981-11-18
申请人： HITACHI LTD
发明人： CHIBA HIROSHI , SEKIYAMA YOSHIO
IPC分类号： H02P23/00
摘要： PURPOSE:To check an overcurrent at the primary side of a motor by controlling an inverter power source by a method wherein a Scherbuis inverter power source and a secondary resistance circuit are closed in parallel without opening a primary power source. CONSTITUTION:When switching is made to the secondary resistance control from Scherbuis control, the contactor 5 at a secondary resistor side is turned ON while holding a breaker 2 and the switching contactor 4 at an inverter side ON. At that time, two secondary switching contactors 4, 5 are closed in paralled. Therefore, auxiliary contacts 4a, 5a are turned On, and the primary current is negatively fed back by a primary current feedback circuit to prevent a primary power source from exceeding a set value and an inverter current is reduced by an amplifier 13 for current control circuit.

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