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 (JP)
OHNUMA NAOTO (JP)
TAKAYAMA NAOKI (JP)
TERUNUMA TOMOAKI (JP)
OHNUMA NAOTO (JP)
TAKAYAMA NAOKI (JP)
TERUNUMA TOMOAKI (JP)
Application Number:
PCT/JP2017/026059
Publication Date:
March 08, 2018
Filing Date:
July 19, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
B66B1/34; B66B1/30; H02P1/46; H02P6/18; H02P6/20; H02P25/022
Domestic Patent References:
| WO2011096119A1 | 2011-08-11 |
Foreign References:
| JP2009057186A | 2009-03-19 | |||
| JP2016000639A | 2016-01-07 | |||
| JP2007308231A | 2007-11-29 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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