Title:
MOTOR-DRIVEN WINCH DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/209269
Kind Code:
A1
Abstract:
When a rapid lowering operation for which the rate of change in operation amount over time is greater than or equal to a predetermined reference rate of change is input to an operating lever (13), a controller (12) calculates the torque corresponding to the tension of a wire rope 2 from the current value measured by an ammeter (18) and performs torque control in such a manner that an electric motor (8) is driven in the lowering direction so that the calculated torque becomes greater than or equal to a predetermined reference torque. An inverter (9) drives the electric motor (8) according to the control signal input from the controller (12).
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Inventors:
HIEKATA TAKASHI
INOUE KOJI
KAWAI HIROAKI
SASAI SHINTAROH
OGAWA TETSUYA
YAMASHITA TOSHIRO
INOUE KOJI
KAWAI HIROAKI
SASAI SHINTAROH
OGAWA TETSUYA
YAMASHITA TOSHIRO
Application Number:
PCT/JP2017/020551
Publication Date:
December 07, 2017
Filing Date:
June 02, 2017
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
KOBELCO CONSTR MACH CO LTD (JP)
KOBELCO CONSTR MACH CO LTD (JP)
International Classes:
B66D1/54; B66C13/23; B66D1/50
Foreign References:
| JPH08225295A | 1996-09-03 | |||
| JP2006199398A | 2006-08-03 | |||
| JPH11139774A | 1999-05-25 | |||
| JPH11171479A | 1999-06-29 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
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