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Title:
ELEVATOR SYSTEM AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/042920
Kind Code:
A1
Abstract:
In order to stably operate a car in the absence of magnetic pole position signals from a magnetic pole position sensor, this elevator system comprises: a synchronous motor which drives the car; a brake; and a drive control device for the synchronous motor. The drive control device is provided with: a current command creation unit which creates a current command; a magnetic pole position command creation unit which creates a magnetic pole position command; an initial magnetic pole position estimation unit which estimates the initial magnetic pole position; and a brake control unit which controls the brake. When the brake is released, the current command creation unit creates a current command with a constant value, and the magnetic pole position command creation unit sets the initial magnetic pole position as a magnetic pole position command, holds the magnetic pole position command at the initial magnetic pole position over a predetermined time period from the release of the brake, and, after the predetermined time period, creates the magnetic pole position command so that the car is operated.

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Inventors:
INOUE Shinsuke (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
OHNUMA Naoto (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
TAKAYAMA Naoki (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
TERUNUMA Tomoaki (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2017/026059
Publication Date:
March 08, 2018
Filing Date:
July 19, 2017
Export Citation:
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Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
International Classes:
B66B1/34; B66B1/30; H02P1/46; H02P6/18; H02P6/20; H02P25/022
Attorney, Agent or Firm:
POLAIRE I.P.C. (13-11, Nihonbashikayabacho 2-chome Chuo-k, Tokyo 25, 〒1030025, JP)
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