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1. 发明专利

JPH10338426A SPEED CONTROLLER OF D.C. MOTOR 失效
公开(公告)号：JPH10338426A
公开(公告)日：1998-12-22
申请号：JP14665397
申请日：1997-06-04
申请人： HITACHI BUILDING SYST CO LTD , HITACHI ELEVATOR ENG
发明人： HATSUTORI SHIGENORI , ANDO TAKEYOSHI , FUKUDA SATORU , KANEKO HIRONORI , INOUE KATSUHIRO , MURAYAMA MASASHIGE
IPC分类号： B66B1/06
摘要： PROBLEM TO BE SOLVED: To improve control performance of a control unit as well as to damp electromagnetic sound to be generated on a DC motor. SOLUTION: In a speed controller, a filter 1 constituted of a condenser, a resistor and a reactor is connected parallel to a D.C. motor 5, and a resonance circuit is constituted of a D.C. reactor 4, the D.C. motor 5 and the filter 1. Electric power converters 2, 3 for converting A.C. power into D.C. power by using a plurality of transistors 21 to 26 and 31 to 36 as switching elements are provided, and only armature current of the D.C. motor 5 is fed back to a current feedback circuit.

2. 发明专利

JPH10120315A POWER CONTROL UNIT FOR DC ELEVATOR 失效
公开(公告)号：JPH10120315A
公开(公告)日：1998-05-12
申请号：JP27623396
申请日：1996-10-18
申请人： HITACHI BUILDING SYST CO LTD , HITACHI ELEVATOR ENG
发明人： FUKUDA SATORU , ANDO TAKEYOSHI , KUROSAWA TOSHIAKI , ATSUZAWA TERUYOSHI , HATSUTORI SHIGENORI , KANEKO HIRONORI
IPC分类号： B66B1/30 , H02P7/03 , H02P7/292 , H02P5/172
摘要： PROBLEM TO BE SOLVED: To provide a DC elevator power control unit capable of preventing the occurrence of a car vibration. and improving the landing accuracy thereof by restraining a current skip at the time of changing over a power converter. SOLUTION: A DC control unit 12 receives a time integrated signal through an integration circuit 15 regarding a difference between an armature current instruction signal IO from a speed control circuit 11 and a feedback current signal IFB detected with a polarity detection circuit 13, a polarity reversal detection signal for the armature current instruction signal IO detected with the polarity detection circuit 13, and a zero detection signal outputted when the feedback current signal IFB detected with a zero detection circuit 14 reaches the vicinity of zero. In addition, transistor drive signals 12a and 12b are outputted to a current skip inhibit circuit 16 as well as a selector circuit 17, when both of the polarity reversal detection signal and the zero detection signal are received, and charge current is fed from the current skip inhibit circuit 16 to the integration circuit 15 over the prescribed time. At the same time, the integrated value of a difference between the armature current instruction signal IO and the feedback current signal IFB is varied by the prescribed value.

3. 发明专利

JPH10114473A DIRECT CURRENT ELEVATOR CONTROLLER 失效
公开(公告)号：JPH10114473A
公开(公告)日：1998-05-06
申请号：JP27014896
申请日：1996-10-11
申请人： HITACHI BUILDING SYST CO LTD , HITACHI ELEVATOR ENG
发明人： FUKUDA SATORU , ANDO TAKEYOSHI , KUROSAWA TOSHIAKI , ATSUZAWA TERUYOSHI , HATSUTORI SHIGENORI , KANEKO HIRONORI
IPC分类号： B66B1/30 , H02P7/03 , H02P7/292 , H02P5/172
摘要： PROBLEM TO BE SOLVED: To suppress a current skip by varying an integral value of an electric current deviation so that armature current is prevented from flowing when a power converter is switched to a power operation or to a regenerative operation. SOLUTION: In transfer from power running to regeneration, a one-shot circuit 16b detects a drop (↓) of a switching command 12b on the receipt of a change in logic of the switching command from '1' to '0', and the logic '0' is output. By means of the '0' signal, a switch SW2 in an analog circuit 16c is closed, and an optionally set voltage and a charge current decided by a limiting resistor 16e are fed to an integration circuit 15. The integration circuit 15 is constructed of an operation amplifier 15a and an integration capacitor 15b, which is charged by output current from a current skip suppressing circuit 16. This charge is finished at the set limit in the one-shot circuit 16b. In this process, the charged integral voltage is set to the value at which no armature current flows even if travel is carried out at any speed.

4. 发明专利

JPH10109838A POWER CONVERTER OOVERVOLTAGE PROTECTION DEVICE FOR DC MOTOR 失效
公开(公告)号：JPH10109838A
公开(公告)日：1998-04-28
申请号：JP26090296
申请日：1996-10-01
申请人： HITACHI BUILDING SYST CO LTD , HITACHI ELEVATOR ENG
发明人： HATSUTORI SHIGENORI , ANDO TAKEYOSHI , KUROSAWA TOSHIAKI , FUKUDA SATORU , ATSUZAWA TERUYOSHI , KANEKO HIRONORI
IPC分类号： B66B1/30
摘要： PROBLEM TO BE SOLVED: To reduce the number of part items so as to increase reliability and reduce costs by suppressing the occurrence of a steep overvoltage with a varistor when a conductive failure occurs in a transistor constituting a power converter, detecting a current flowing at this time to detect the overvoltage and operating an energy absorbing circuit. SOLUTION: When a transistor 21A is placed in a non-conductive state to shut off a current route during the conversion operation of a power converter 2, a circuit voltage is increased by the inductance of a DC reactor 7 and the armature 8 of a DC motor and a steep current change. Then, when the current of the circuit voltage is supplied to a varistor 4, an overvoltage is absorbed by the varistor 4. Also, at this time, an overvoltage is detected from the current flowing to the varistor 4 by an overvoltage detecting circuit 5 and, by providing a driving signal to the thyristor 65 of an energy absorbing circuit 6, energy produced by the inductance of the DC reactor 7 and the armature 8 is heat- consumed at a resistance 66 and simultaneously the transistor driving signal of an output converter 2 is shielded.

5. 发明专利

JPH10109839A PROTECTIVE DEVICE FOR DC ELEVATOR POWER CONVERTER 失效
公开(公告)号：JPH10109839A
公开(公告)日：1998-04-28
申请号：JP26090396
申请日：1996-10-01
申请人： HITACHI BUILDING SYST CO LTD , HITACHI ELEVATOR ENG
发明人： ATSUZAWA TERUYOSHI , ANDO TAKEYOSHI , KUROSAWA TOSHIAKI , FUKUDA SATORU , HATSUTORI SHIGENORI , KANEKO HIRONORI
IPC分类号： B66B1/30 , B66B1/34
摘要： PROBLEM TO BE SOLVED: To suppress the extra discharge of a capacitor while an overvoltage protection circuit is operating, or a short circuit is operating, which absorbs energy generated by a DC reactor and a DC motor during elevator stopping. SOLUTION: This device is provided with a discharge preventing diode added to the discharge route of capacitor 5 - short circuit 11 -capacitor 5 formed by connecting both ends of the capacitor 5 with diodes 61-64 for connecting the output terminals of the first and second power converters 2, 3, and the short circuit 11, and is capable of suppressing the extra discharge of the capacitor generated each time an elevator stops.

6. 发明专利

JPH09235079A CONTROL DEVICE FOR DIRECT CURRENT ELEVATOR 失效
公开(公告)号：JPH09235079A
公开(公告)日：1997-09-09
申请号：JP4314596
申请日：1996-02-29
申请人： HITACHI BUILDING SYST CO LTD , HITACHI ELEVATOR ENG
发明人： ATSUZAWA TERUYOSHI , ANDO TAKEYOSHI , FUKUDA SATORU , HATSUTORI SHIGENORI , KANEKO HIRONORI
IPC分类号： B66B1/30
摘要： PROBLEM TO BE SOLVED: To facilitate designing and discussion of a control system during modernization by providing an elevator speed control circuit and a control system characteristics compensation circuit counting auto calculation means for calculation the coefficient of a characteristics compensation circuit of a electric current control. SOLUTION: A speed control circuit 11 takes deviation of a feed back speed and a speed instruction which are detected by means of a speed detector 10 and generates the current instruction of a motor. A current control circuit 12 generates a PWM pulse signal from the deviation of a current instruction generated from the speed control circuit 11 and the current flowing a motor 3. A base drive circuit 13 drives a converter unit 2 from the PWB pulse signal to be output from the current control circuit 12. An inertial efficiency calculation means 14 fetches the speed detected by means of the speed detector 10 and calculates inertial efficiency from the relationship between the fetch measurement time and an unbalance torque. A control system compensation circuit coefficient auto calculation means 15 automatically calculates coefficients of a compensation circuit, proportion integrator, etc.

7. 发明专利

JPH1179595A EARTHQUAKE CONTROL OPERATION DEVICE OF ELEVATOR 失效
公开(公告)号：JPH1179595A
公开(公告)日：1999-03-23
申请号：JP24390997
申请日：1997-09-09
申请人： HITACHI LTD , HITACHI BUILDING SYST CO LTD
发明人： HAMADA TOMOYUKI , TANABATA TAKAYA , ANDO TAKEYOSHI
IPC分类号： B66B5/02
摘要： PROBLEM TO BE SOLVED: To safely and efficiently restore an elevator whose operation is stopped by an earthquake sensor in the generation of an earthquake. SOLUTION: A detecting level to be set in an earthquake control operation controller is set by a detecting level determining processing means 101 for determining the level for each elevator according to the generating situation of damage for each section sectioned by the stroke length of the elevator, the model, the year of deliver, the structure of a building, and the kind of the ground on which the building is constructed, so as to be adaptable to the actual situation.

8. 发明专利

JPH1160099A ABNORMALITY DIAGNOSING DEVICE FOR MAGNET BRAKE 失效
公开(公告)号：JPH1160099A
公开(公告)日：1999-03-02
申请号：JP23266297
申请日：1997-08-28
申请人： HITACHI BUILDING SYST CO LTD
发明人： IGARASHI YOSHIHARU , ANDO TAKEYOSHI , ISHIDA REI , KUBOTA KOJI , SHIBAZAKI TAKAYUKI
IPC分类号： B66B5/00 , B66B11/08 , G05B23/02
摘要： PROBLEM TO BE SOLVED: To provide an abnormality diagnosing device for a magnet brake, which can diagnose abnormalities without difference among results of diagnosis. SOLUTION: This abnormality diagnosing device is composed of an extracting part 4 for detecting a time 4a necessary to start attraction of a movable piece 2b, a first abnormality diagnosing part 6 which carries out diagnosis in accordance with whether the detected time 4a is present or not, and which has a compensating part for compensating a variation in the attraction time caused by a difference between a rated current value and a measured current value, a second abnormality diagnosing part 7 for detecting a current drop 4c when the attraction of the movable piece 2b is started, so as to carry out diagnosis, and a third abnormality diagnosing part 8 for calculating an electromagnetic attracting force from a current value at upon initiation of the attraction of the movable piece 2b so as to carry out diagnosis.

9. 发明专利

JPH1149448A EARTHQUAKE DAMAGE ESTIMATION SYSTEM 失效
公开(公告)号：JPH1149448A
公开(公告)日：1999-02-23
申请号：JP21036797
申请日：1997-08-05
申请人： HITACHI LTD , HITACHI BUILDING SYST CO LTD
发明人： TANABATA TAKAYA , HAMADA TOMOYUKI , ANDO TAKEYOSHI
IPC分类号： B66B5/02 , G08B5/00 , G08B31/00
摘要： PROBLEM TO BE SOLVED: To quickly perform restoration action by analysing relation between earthquake motion, construction of elevators, and damage based on disaster data due to earthquke generated beforehead and data of the elevator controlled in operation, and predicting damage based on the analysis result and displaying it. SOLUTION: When earthquake is generated, the maximum acceleration values are collected by a information collecting means 1, and the maximum acceleration values applied to respective elevators are obtained based on them. Next construction information as to the respective elevators preserved in an information recording device 2 are drawn out, a damage case data base 4 is made by a data analysis means 3, and in addition a damage estimation data base 5 is made based on the made damage case data. Thereafter by the damage estimation means 6, the damaged position, the damaged condition, and the damage generating rate are read out following to the pattern of a part of the damage data, from the table in the range corresponding to the maximum acceleration values received with the elevators in a pattern data base, and the results are displayed on a display device 7.

10. 发明专利

JPH10330055A BRAKE FORCE MEASURING DEVICE OF ELEVATOR BRAKE 失效
公开(公告)号：JPH10330055A
公开(公告)日：1998-12-15
申请号：JP14237597
申请日：1997-05-30
申请人： HITACHI BUILDING SYST CO LTD
发明人： ISHIDA REI , ANDO TAKEYOSHI , SANEKANE ATSUSHI , YAGAWA SHOJI
IPC分类号： B66B1/32 , B66B5/00
摘要： PROBLEM TO BE SOLVED: To prevent that a moment of inertia is measured duplicatingly and enhance a work efficiency by judging whether the moment of inertia data memorized in the already measured memory means is existed or not by a judgement means at the measuring time of a brake force. SOLUTION: A personal computer 16 has a data base 18 in which various constant data required to calculate the diameter of a hoist sheave 9, the moment of inertia of the weight of a cage 6 and the weight of a balance weight 7 and the brake force of a brake 4 are memorized per each elevator. In order to calculate the brake force of the brake 4, at first, the personal computer 16 is operated and the data such as the diameter of the hoist sheave 9 and the weight and moment of inertia of the cage 6 which are the various constant of an elevator to be measured is read out from the data base 18. Then, it is judged whether the data of the moment of inertia of the elevator to be measured is existed in the read out data. If no data of the moment of inertia is existed, the moment of inertia is calculated and if exists, the brake force is calculated.

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