DK200500236A - Method and apparatus for determining load holding current strength - Google Patents

Method and apparatus for determining load holding current strength Download PDF

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Publication number
DK200500236A
DK200500236A DK200500236A DKPA200500236A DK200500236A DK 200500236 A DK200500236 A DK 200500236A DK 200500236 A DK200500236 A DK 200500236A DK PA200500236 A DKPA200500236 A DK PA200500236A DK 200500236 A DK200500236 A DK 200500236A
Authority
DK
Denmark
Prior art keywords
motor
load
holding current
load holding
current strength
Prior art date
Application number
DK200500236A
Other languages
Danish (da)
Inventor
Soerensen Peter Michael
Henning B Kristensen
Soerensen Aksel Kloster
Original Assignee
Guldmann V As
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 filed Critical Guldmann V As
Priority to DK200500236A priority Critical patent/DK176294B1/en
Priority to PCT/DK2006/000094 priority patent/WO2006086990A2/en
Publication of DK200500236A publication Critical patent/DK200500236A/en
Application granted granted Critical
Publication of DK176294B1 publication Critical patent/DK176294B1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0087Devices facilitating maintenance, repair or inspection tasks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00Control systems of elevators in general
    • B66B1/02Control systems without regulation, i.e. without retroactive action

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

Description

KRAV 1. Fremgangsmåde til at bestemme den motorstrømstyrke, som er tilstrækkelig til at holde en last (4) i et løfteapparat (2), hvor motoren (6) er en elektrisk induktionsmotor, som drives af en elektrisk strømkilde (12), hvor lasten (4) er fastgjort til en wire (5) på en tromle (7), der drives af motoren (6), og hvor fremgangsmåden omfatter et starttrin, hvor lasten (4) accelereres, et ligevægtstilstandstrin, hvor lasten (4) hæves med hovedsagelig konstant hastighed, mens wiren (5) opvikles på tromlen (7), og et bremsetrin, hvor lasten (4) decelereres, kendetegnet ved, at motorens strømstyrke (I) måles ved slutningen af ligevægtstilstandstrinet, af hvilket lastholdestrømstyrken bestemmes ved sammenligning af den målte motorstrøm (I) med en empirisk tabel, af hvilken lastholdestrømmen bestemmes for at udbalancere det drejningsmoment (T) på motoren (6), som forårsages aflasten (4). 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at den empiriske tabel bestemmes af en serie målinger af motorens strømstyrke (I) ved slutningen af ligevægtstrinet for forskellige drejningsmomenter (T) forårsaget af forskellige laster (4). og at motorstrømstrømstyrken (1) er i det væsentlige proportional med drejningsmomentet (T), hvorved der etableres et empirisk forhold mellem den målte motorstrømstyrke (1) og drejningsmomentet (T). 3. Fremgangsmåde ifølge ethvert af kravene 1-2, kendetegnet ved, at det empiriske forhold mellem motorstrømstyrken (I) og drejningsmomentet (T) justeres fortløbende under brug af løfteapparatet (2). 4. Fremgangsmåde ifølge krav 4, kendetegnet ved, at starttrinet omfatter trin med at accelerere lasten (4) ved at tilføre et pulsbreddemoduleret signal til motoren (6) og ændre det pulsbreddemodulerede signals arbejdscyklus på sådan måde, at den effektive spænding forøges, og at ligevægtstrinet udføres ved at tilføre et pulsbreddemoduleret signal til motoren (6) med konstant arbejdscyklus, og at bremsetrinet omfatter trin med at decelerere lasten (4) ved at tilføre et pulsbreddemoduleret signal til motoren (6) og ændre det pulsbreddemodulerede signals arbejdscyklus på sådan måde, at den effektive spænding formindskes. 5. Løfteapparat (2), omfattende en elektrisk induktionsmotor (6), et transmissionssystem (14), et spil indeholdende en wire (5), som i én yderende er fastgjort til en tromle (7) på spillet og Ϊ den anden yderende er udstyret med midler til at fastgøre en last (4), hvor tromlen (7) drives af den elektriske induktionsmotor (6), en driver, som forsyner den elektriske induktionsmotor (6) med strøm, samt en styring (10) til styring af motoren (6), kendetegnet ved, at den elektriske induktionsmotor (6) er en pulsbreddemoduleret jævnstrømsmotor, og at styringen (10) er indrettet til at modtage en måling af den til den elektriske induktionsmotor (6) førte strøm, og at styringen (10) er udstyret med en empirisk tabel. 6. Anvendelse af et løfteapparat (2) ifølge krav 5 i en fremgangsmåde ifølge ethvert af krav 1 - 4 for løftning af en person og/eller et dyr.A method for determining the motor current sufficient to hold a load (4) in a lifting device (2), wherein the motor (6) is an electric induction motor powered by an electric power source (12), wherein the load (4) is attached to a wire (5) on a drum (7) driven by the motor (6), the method comprising a starting step in which the load (4) is accelerated, an equilibrium state step in which the load (4) is raised by substantially constant speed while the wire (5) is wound on the drum (7) and a braking step at which the load (4) is decelerated, characterized in that the motor current (I) is measured at the end of the equilibrium state stage, of which the load holding current is determined by comparing it. measured motor current (I) with an empirical table, of which the load holding current is determined to balance the torque (T) of the motor (6) caused by the load (4). Method according to claim 1, characterized in that the empirical table is determined by a series of measurements of the motor current (I) at the end of the equilibrium step for different torques (T) caused by different loads (4). and that the motor current (1) is substantially proportional to the torque (T), thereby establishing an empirical relationship between the measured motor current (1) and the torque (T). Method according to any one of claims 1-2, characterized in that the empirical relationship between the motor current (I) and the torque (T) is continuously adjusted using the lifting device (2). Method according to claim 4, characterized in that the starting step comprises steps of accelerating the load (4) by supplying a pulse width modulated signal to the motor (6) and changing the working cycle of the pulse width modulated signal so as to increase the effective voltage and the equilibrium step is performed by supplying a pulse width modulated signal to the constant duty cycle motor (6), and the braking step comprises steps of decelerating the load (4) by applying a pulse width modulated signal to the motor (6) and changing the pulse width modulated signal's operating cycle in such a manner. that the effective voltage is reduced. A hoist (2) comprising an electric induction motor (6), a transmission system (14), a spindle containing a wire (5) attached to one drum to a drum (7) on the winch and Ϊ the other end is equipped with means for securing a load (4), wherein the drum (7) is driven by the electric induction motor (6), a driver supplying the electric induction motor (6), and a control (10) for controlling the motor (6), characterized in that the electric induction motor (6) is a pulse width modulated DC motor and that the control (10) is adapted to receive a measurement of the current supplied to the electric induction motor (6) and that the control (10) is equipped with an empirical table. Use of a lifting device (2) according to claim 5 in a method according to any one of claims 1-4 for lifting a person and / or an animal.

DK200500236A 2005-02-16 2005-02-16 Method and apparatus for determining load holding current strength DK176294B1 (en)

Priority Applications (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
PCT/DK2006/000094 WO2006086990A2 (en) 2005-02-16 2006-02-16 Method and apparatus for determining load holding current

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200500236 2005-02-16
DK200500236A DK176294B1 (en) 2005-02-16 2005-02-16 Method and apparatus for determining load holding current strength

Publications (2)

Publication Number Publication Date
DK200500236A true DK200500236A (en) 2006-08-17
DK176294B1 DK176294B1 (en) 2007-06-18

Family

ID=36916810

Family Applications (1)

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

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
KR20170078789A (en) * 2014-10-31 2017-07-07 가와사끼 쥬고교 가부시끼 가이샤 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

Family Cites Families (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
JPH0817599B2 (en) * 1988-04-18 1996-02-21 日本オーチス・エレベータ株式会社 Elevator speed controller
US5457372A (en) * 1993-07-16 1995-10-10 Pignatelli; Joseph Load sensing, soft-braking method and apparatus using the same
KR100312772B1 (en) * 1998-12-15 2002-11-22 엘지 오티스 엘리베이터 유한회사 Elevator speed control device
FI113754B (en) * 2003-09-10 2004-06-15 Kone Corp Controlling method for elevator without counterweight, involves transmitting only position and torque control signals between elevator control section and motor drive section to control the motor of elevator

Also Published As

Publication number Publication date
WO2006086990A2 (en) 2006-08-24
WO2006086990A3 (en) 2007-03-01
DK176294B1 (en) 2007-06-18

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