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公开(公告)号：DE60219096D1
公开(公告)日：2007-05-10
申请号：DE60219096
申请日：2002-01-17
Applicant: HITACHI LTD
Inventor： KIM HOUNG JOONG , UEDA SHIGETA
IPC: H02K1/22 , H02K21/00 , B61C9/48 , B61F3/04 , B61F3/16 , H02K1/27 , H02K1/28 , H02K16/02 , H02K21/14 , H02K29/08
Abstract: A dynamo-electric machine (2) has a stator (10, 11) with a primary winding (11) and a rotor (20-23) with a field magnet (21) and a shaft (22). The field magnet includes a first field magnet (21A) having different polarity magnetic poles sequentially arranged in a rotation direction and a second field magnet (21B) having different polarity magnetic poles sequentially arranged in a rotation direction. The machine further has a mechanism (23, 60-62) for shifting the first and the second field magnets in axial and rotation directions.
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公开(公告)号：DE3764810D1
公开(公告)日：1990-10-18
申请号：DE3764810
申请日：1987-02-02
Applicant: HITACHI LTD
Inventor： UEDA SHIGETA , HOMBU MITSUYUKI , ANDO TAKEKI , SASAKI KAZUHIKO , HONDA KAZUO , TAKAHASHI HIDEAKI
Abstract: In a current-type converter system, in which a DC current is fed to a load (8) through a pulsating current suppressing DC reactor (DCL) from a current-type converter constituted by self-extinction element (11...16) connected in a bridge circuit, a converter protection apparatus is arranged such that when the terminal voltage of the DC reactor (DCL) becomes an overvoltage, the self-extinction elements (11...16) are turned on so as to form a closed circuit including the DC reactor (DCL), the load (8), and the converter. The overvoltage can thus be suppressed and continuous operation of the converter can be carried out.
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公开(公告)号：GB2180108A
公开(公告)日：1987-03-18
申请号：GB8620949
申请日：1986-08-29
Applicant: HITACHI LTD
Inventor： KUROSAWA TOSHIAKI , SASAKI KAZUHIKO , MITSUI NOBUO , SAKAI YOSHIO , NAKAZATO MASAO , HONBU MITSUYUKI , UEDA SHIGETA , SHIMA SEIYA , KOMURO KATSU , ANDO TAKEKI , UEDA AKITERU
Abstract: An elevator control apparatus comprises an inverter device for supplying an induction motor for driving an elevator cage with AC electric power of variable voltage and frequencies and control equipment for controlling the output voltage and frequencies of the inverter device in response to signals produced in floors served by the elevator and in an elevator cage. The inverter device is constructed by a converter unit for converting AC electric power to DC electric power, at the input end of which a capacitor is connected in parallel with an AC electric source, an inverter unit for inverting the DC electric power converted in the converter unit into AC electric power, at the output end of which a capacitor is connected in parallel with an induction motor for driving the elevator cage and a DC reactor connected between the converter unit and the inverter unit. The thus constructed elevator control apparatus does not cause interference in electric appliances such as audio equipment, computer etc. existing within a building in which the elevator is installed.
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公开(公告)号：GB2169160A
公开(公告)日：1986-07-02
申请号：GB8525101
申请日：1985-10-11
Applicant: HITACHI LTD
Inventor： UEDA SHIGETA , HOMBU MITSUYUKI , HONDA KAZUO , UEDA AKITERU , SUZUKI - SHIMANA KATSUNORI , SHIMA SEIYA
Abstract: A current-source power converting apparatus having a three phase AC-DC converter composed of self-extinction devices for converting an AC power furnished from an three phase AC power source into a DC power and a DC-AC inverter connected with the AC-DC converter through a DC reactor for re-converting the DC power into a three phase AC power to supply the re-converted power for a load. When the failure of the AC power source is detect according to one embodiment, the AC power source is detached from the AC-DC converter and a battery is connected between arbitrary two phases at the input end of the AC-DC converter. After that, the DC power of the battery is supplied for the DC-AC inverter intermittently by switching the corresponding self-extinction devices of the AC-DC converter and controlled by varying the duty ratio of the switching operation.
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公开(公告)号：DE3414102A1
公开(公告)日：1984-11-15
申请号：DE3414102
申请日：1984-04-13
Applicant: HITACHI LTD
Inventor： UEDA SHIGETA , HOMBU MITSUYUKI , MATSUDA YASUO
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Patent Agency Ranking
公开(公告)号：DE19811864B4
公开(公告)日：2005-02-17
申请号：DE19811864
申请日：1998-03-18
Applicant: HITACHI LTD , TOKYO ELECTRIC POWER CO
Inventor： SHIMAMURA KOTARO , MORITA YUUICHIRO , TAKAHASHI YOSHITAKA , HOTTA TAKASHI , SATOU HIROYASU , UEDA SHIGETA , BANDO AKIRA , SUZUKI HIROKAZU , SAKAMOTO KOJI
Abstract: A replicated controller and a fault recovery method therefor which can restore a faulty system to a normal state without interrupting operation of an equipment, even in an equipment controller performing processing with short operating periods. In a fault recovery method for a replicated controller, control data is divided into a plurality of blocks on the basis of dependency of the blocks, and a plurality of blocks are transferred in a sequential order of superiority of the dependency from the normally operating system to the faulty system in a period over a plurality of operating periods. BY this, even in an equipment controller performing processing at a short operating period, the system, in which failure is caused, can be restored into normal state without interrupting operation of the equipment.
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公开(公告)号：DE19811864A1
公开(公告)日：1998-10-08
申请号：DE19811864
申请日：1998-03-18
Applicant: HITACHI LTD
Inventor： SHIMAMURA KOTARO , MORITA YUUICHIRO , TAKAHASHI YOSHITAKA , HOTTA TAKASHI , SATOU HIROYASU , UEDA SHIGETA , BANDO AKIRA , SUZUKI HIROKAZU , SAKAMOTO KOJI
Abstract: A replicated controller and a fault recovery method therefor which can restore a faulty system to a normal state without interrupting operation of an equipment, even in an equipment controller performing processing with short operating periods. In a fault recovery method for a replicated controller, control data is divided into a plurality of blocks on the basis of dependency of the blocks, and a plurality of blocks are transferred in a sequential order of superiority of the dependency from the normally operating system to the faulty system in a period over a plurality of operating periods. BY this, even in an equipment controller performing processing at a short operating period, the system, in which failure is caused, can be restored into normal state without interrupting operation of the equipment.
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公开(公告)号：DE69124934D1
公开(公告)日：1997-04-10
申请号：DE69124934
申请日：1991-11-27
Applicant: HITACHI LTD
Inventor： UEDA SHIGETA , IKIMI TAKASHI , HOMBU MITSUYUKI , OGAWA NOBORU , JIFUKU YORITO , KAMIYAMA KENZO
Abstract: A large capacity (1 - 2 MkVA) driving system for variable-speed-driving an AC motor by a power converter (inverter, converter) (100, 200) in which GTO (gate turn-off) thyristors (111, 121, 211, 221) are used as switching devices. In this system, high frequency GTO thyristors are connected in series, power converters are multiplexed, the AC motor is used in its plural phases, instantaneous spatial vector PWM (pulse width modulation) control (310, 320) is performed, vector control (330) for the motor is performed, and a circuit (4) for recovering snubber energy for GTO thyristors and a power factor adjusting circuit (340) are provided. Thus, this driving system provides a torque ripple of 1% or less, speed response of 60 rad/sec or more, efficiency of 95% or more and power factor of 98% or more.
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公开(公告)号：DE68916350T2
公开(公告)日：1994-12-08
申请号：DE68916350
申请日：1989-09-19
Applicant: HITACHI LTD
Inventor： UEDA SHIGETA , HONDA KAZUO , IKIMI TAKASHI , MATSUDA TOSHIHIKO , NAGASE HIROSHI , HOMBU MITSUYUKI , MUTOH NOBUYOSHI
IPC: H02M7/5387
Abstract: Disclosed is a control method and a control apparatus (7) for controlling a PWM inverter (2). The PWM inverter receives AC power and generates an AC output having a controlled frequency to be supplied to an AC motor (3). A circuit (8, 9) is provided for generating, on the basis of a given running command ( omega *), a PWM signal controlling the inverter with a given sampling period, and a further circuit (10) controls the PWM signal generating circuit, whereby the AC motor generates an electromagnetic tone preselected so as to correspond to desired information when the AC motor is driven by output of the inverter controlled by the PWM signal. The above described desired information may be information representing the running state of the motor or selected music.
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公开(公告)号：HK69490A
公开(公告)日：1990-09-14
申请号：HK69490
申请日：1990-09-06
Applicant: HITACHI LTD
Inventor： INABA HIROMI , SHIMA SEIYA , HOKARI SADAO , TOBITA TOSHIMITSU , TAKAHASHI HIDEAKI , UEDA SHIGETA
Abstract: In a three phase inverter which is composed of transistors turned on or off in accordance with the PWM control, the pulse widths of PWM gate signals for the transistors are determined in accordance with the magnitudes of two of the three phases of the current to be output by the inverter. The load of a processor for generating the gate signals can be reduced to the great extent, and in addition thereto, the waveform of the output current of the inverter is much improved.
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