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Patent Searching and Data


Title:
HOISTING MACHINE MOTOR CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/261060
Kind Code:
A1
Abstract:
The present invention prevents car tilting caused by differences in sheave diameter, and the like from accumulating with operation. A hoisting machine motor control system for an elevator having at least two hoisting machines installed in the path that a car is moving along, the hoisting machine motor control system comprising: a first speed controller that receives the deviation between a first rope feed speed and a speed command value and outputs a first torque command value; a second speed controller that receives the deviation between a second rope feed speed and a speed command value and outputs a second torque command value; a first current controller that controls a first motor current value supplied to the motor of a first hoisting machine according to the first torque command value; a second current controller that controls a second motor current value supplied to the motor of a second hoisting machine according to the second torque command value; and a feedback element. The feedback element inputs the difference between the first torque command value and the second torque command value to the first speed controller and the second speed controller.

Inventors:
SHIMURA ITSUKI (JP)
ARAKAWA ATSUSHI (JP)
Application Number:
PCT/JP2021/015716
Publication Date:
December 30, 2021
Filing Date:
April 16, 2021
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
B66B11/08; B66B1/30; B66B9/10
Domestic Patent References:
WO2019186788A12019-10-03
WO2017010929A12017-01-19
Foreign References:
JP2019043749A2019-03-22
JP2020019600A2020-02-06
JPH11335037A1999-12-07
JP2009221009A2009-10-01
JP2004051250A2004-02-19
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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