WO2006086990A3 - Method and apparatus for determining load holding current - Google Patents

Method and apparatus for determining load holding current Download PDF

Info

Publication number
WO2006086990A3
WO2006086990A3 PCT/DK2006/000094 DK2006000094W WO2006086990A3 WO 2006086990 A3 WO2006086990 A3 WO 2006086990A3 DK 2006000094 W DK2006000094 W DK 2006000094W WO 2006086990 A3 WO2006086990 A3 WO 2006086990A3
Authority
WO
WIPO (PCT)
Prior art keywords
motor
load
current
induction motor
drum
Prior art date
Application number
PCT/DK2006/000094
Other languages
French (fr)
Other versions
WO2006086990A2 (en
Inventor
Aksel Kloster Soerensen
Henning B Kristensen
Peter Michael Soerensen
Original Assignee
Guldmann V As
Aksel Kloster Soerensen
Henning B Kristensen
Peter Michael Soerensen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guldmann V As, Aksel Kloster Soerensen, Henning B Kristensen, Peter Michael Soerensen filed Critical Guldmann V As
Publication of WO2006086990A2 publication Critical patent/WO2006086990A2/en
Publication of WO2006086990A3 publication Critical patent/WO2006086990A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/02—Control systems without regulation, i.e. without retroactive action

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Ac Motors In General (AREA)
  • Motor And Converter Starters (AREA)

Abstract

The preset invention relates to a method for determining the amount of motor current that is sufficient to hold a load (4) in a hoisting apparatus (2), where the motor (6) is an electrical induction motor that is driven by an electrical power source (12), the load (4) is attached to a line (5) on a drum (7) that is driven by the motor (6), and where the method comprises a start step where the load (4) is accelerated, a steady state step where the load (4) is hoisted with substantially constant speed while the line (5) is winded onto the drum (7), and a breaking step where the load (4) is decelerated where the motor current (I) is measured at the end of the steady state step, from which the load holding current is determined by comparing the measured motor current (I) with an empirical table, from which the load holding current is determined in order to counterbalance the torque (T) on the motor (6) caused by the load (4). The preset invention, furthermore, relates to a hoisting apparatus (2) comprising an electric induction motor (6), a transmission system (14), a winch containing a line (5) that in one extremity is attached to a drum (7) of the winch and in the other extremity is equipped with means for attaching a load (4), where the drum (7) is driven by the electric induction motor (6), a driver which supplies the electric induction motor (6) with a current and a controller (10) for controlling the motor (6) where the electric induction motor (6) is a pulse width modulated DC electric motor, and the controller (10) is adapted to receive a measurement of the current supplied to the electric induction motor (6), and the controller (10) is equipped with an empirical table.
PCT/DK2006/000094 2005-02-16 2006-02-16 Method and apparatus for determining load holding current WO2006086990A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200500236A DK176294B1 (en) 2005-02-16 2005-02-16 Method and apparatus for determining load holding current strength
DKPA200500236 2005-02-16

Publications (2)

Publication Number Publication Date
WO2006086990A2 WO2006086990A2 (en) 2006-08-24
WO2006086990A3 true WO2006086990A3 (en) 2007-03-01

Family

ID=36916810

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2006/000094 WO2006086990A2 (en) 2005-02-16 2006-02-16 Method and apparatus for determining load holding current

Country Status (2)

Country Link
DK (1) DK176294B1 (en)
WO (1) WO2006086990A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016067457A1 (en) * 2014-10-31 2016-05-06 川崎重工業株式会社 Transfer system and method for controlling same
CN114448305B (en) * 2020-10-30 2023-07-14 广东美的环境电器制造有限公司 Motor control method, circuit, device, equipment and storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB807903A (en) * 1956-09-21 1959-01-21 Gen Electric Co Ltd Improvements in or relating to electric motor control systems
GB846942A (en) * 1956-11-09 1960-09-07 Demag Zug Gmbh Means for controlling the starting of electric motors for driving cranes
EP0338777A2 (en) * 1988-04-18 1989-10-25 Otis Elevator Company Speed control system for elevators
US5457372A (en) * 1993-07-16 1995-10-10 Pignatelli; Joseph Load sensing, soft-braking method and apparatus using the same
US6283252B1 (en) * 1998-12-15 2001-09-04 Lg Industrial Systems Co., Ltd. Leveling control device for elevator system
WO2005023695A1 (en) * 2003-09-10 2005-03-17 Kone Corporation Control of an elevator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB807903A (en) * 1956-09-21 1959-01-21 Gen Electric Co Ltd Improvements in or relating to electric motor control systems
GB846942A (en) * 1956-11-09 1960-09-07 Demag Zug Gmbh Means for controlling the starting of electric motors for driving cranes
EP0338777A2 (en) * 1988-04-18 1989-10-25 Otis Elevator Company Speed control system for elevators
US5457372A (en) * 1993-07-16 1995-10-10 Pignatelli; Joseph Load sensing, soft-braking method and apparatus using the same
US6283252B1 (en) * 1998-12-15 2001-09-04 Lg Industrial Systems Co., Ltd. Leveling control device for elevator system
WO2005023695A1 (en) * 2003-09-10 2005-03-17 Kone Corporation Control of an elevator

Also Published As

Publication number Publication date
WO2006086990A2 (en) 2006-08-24
DK176294B1 (en) 2007-06-18
DK200500236A (en) 2006-08-17

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