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公开(公告)号：HK10488A
公开(公告)日：1988-02-12
申请号：HK10488
申请日：1988-02-04
Applicant: HITACHI LTD
Inventor： INABA HIROMI , NAKASHIMA HAJIME , KIWAKI HISAKATSU , UEDA AKITERU , ANDO TAKEKI , KUROSAWA TOSHIAKI , SAKAI YOSHIO
Abstract: In an elevator wherein an elevator cage is repeatedly run among a plurality of floors by controlling a cage driving motor in accordance with a velocity command; a floor arrival error involved when the elevator cage has arrived at the floor is detected, and the velocity command for the subsequent operation is corrected in accordance with the floor arrival error, thereby to enhance the floor arrival precision.
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公开(公告)号：GB2135837A
公开(公告)日：1984-09-05
申请号：GB8403187
申请日：1984-02-08
Applicant: HITACHI LTD , HITACHI ENG CO LTD
Inventor： ANDO TAKEKI , UEDA AKITERU , KUROSAWA TOSHIAKI , KUROHA HIROAKI , INABA HIROMI , NAKASHIMA HAJIME , SHIMA SEIYA , SAKAI YOSHIO
Abstract: The apparatus includes elements, e.g. GTO's (UGTO, VGTO, WGTO) connected to the positive arms respectively of a full-wave controlled-rectifier bridge circuit rectifying the output of an AC power source (Ea). The current flowing through a load (L) is circulated through a circulating loop when any one of the switching elements is turned off. A plurality of series circuits each including a capacitor (Cf) and a reactor (LF) connected in series is connected across the power supply lines of the AC power source, so that an overvoltage induced in the power source part when any one of the switching elements is turned off can be absorbed by the associated capacitor, and a discharge current discharged with a sharp rise from the capacitor to flow through the circulating loop when the switching element is then turned on is suppressed by the associated reactor. In other embodiments the apparatus chops rectified AC, Fig. 11, or inverts rectified AC, Fig. 12. In each of these latter embodiments, a single series circuit of a capacitor and a reactor is connected across the input power supply lines to the chopper switching element and inverter switching elements. The apparatus may be used in a rail vehicle, Fig. 13, or an elevator, Fig. 14.
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公开(公告)号：GB2144560B
公开(公告)日：1987-06-10
申请号：GB8416886
申请日：1984-07-03
Applicant: HITACHI LTD
Inventor： INABA HIROMI , NAKASHIMA HAJIME , KIWAKI HISAKATSU , UEDA AKITERU , ANDO TAKEKI , KUROSAWA TOSHIAKI , SAKAI YOSHIO
Abstract: In an elevator wherein an elevator cage is repeatedly run among a plurality of floors by controlling a cage driving motor in accordance with a velocity command; a floor arrival error involved when the elevator cage has arrived at the floor is detected, and the velocity command for the subsequent operation is corrected in accordance with the floor arrival error, thereby to enhance the floor arrival precision.
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公开(公告)号：GB2144560A
公开(公告)日：1985-03-06
申请号：GB8416886
申请日：1984-07-03
Applicant: HITACHI LTD
Inventor： INABA HIROMI , NAKASHIMA HAJIME , KIWAKI HISAKATSU , UEDA AKITERU , ANDO TAKEKI , KUROSAWA TOSHIAKI , SAKAI YOSHIO
Abstract: In an elevator wherein an elevator cage is repeatedly run among a plurality of floors by controlling a cage driving motor in accordance with a velocity command; a floor arrival error involved when the elevator cage has arrived at the floor is detected, and the velocity command for the subsequent operation is corrected in accordance with the floor arrival error, thereby to enhance the floor arrival precision.
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