ATE57893T1 - METHOD FOR SUPPLYING ENERGY TO A THREE-PHASE MOTOR OF A HOIST AND EQUIPMENT FOR CARRYING OUT THE METHOD. - Google Patents
METHOD FOR SUPPLYING ENERGY TO A THREE-PHASE MOTOR OF A HOIST AND EQUIPMENT FOR CARRYING OUT THE METHOD.Info
- Publication number
- ATE57893T1 ATE57893T1 AT87111895T AT87111895T ATE57893T1 AT E57893 T1 ATE57893 T1 AT E57893T1 AT 87111895 T AT87111895 T AT 87111895T AT 87111895 T AT87111895 T AT 87111895T AT E57893 T1 ATE57893 T1 AT E57893T1
- Authority
- AT
- Austria
- Prior art keywords
- lifting
- load
- phase motor
- limiting
- current intensity
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/48—Control devices automatic
- B66D1/485—Control devices automatic electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/22—Control systems or devices for electric drives
- B66C13/23—Circuits for controlling the lowering of the load
- B66C13/26—Circuits for controlling the lowering of the load by ac motors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Control Of Ac Motors In General (AREA)
- Elevator Control (AREA)
- Control Of Multiple Motors (AREA)
Abstract
1. A method for supplying a three-phase motor (M) of a hoisting unit provided with a load measuring unit (6), in particular an asynchronous motor and in particular a cage motor, with electric energy of variable frequency and variable voltage or current intensity, in particular from a converter (1, 2), wherein the frequency is regulated such that when lifting a lifting load the three-phase motor forms the required lifting moment and wherein a basic value of the voltage or the current intensity is preset to be so high in the lower frequency range, that the magnetization of the three-phase motor is also sufficient in the lower frequency range for forming the lifting moment and for lifting load, characterised in that the basic value (U2) of the voltage (U) or current intensity is lowered relative to the limiting basic value (U1) required for forming a limiting lifting moment and for lifting a limiting lifting load, if the lifting load (5) detected by the load measuring unit (6) is smaller than the limiting lifting load.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3629266 | 1986-08-28 | ||
EP87111895A EP0259656B1 (en) | 1986-08-28 | 1987-08-17 | Process for supplying power to a three-phase motor of a lifting device, and device for carrying out the process |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE57893T1 true ATE57893T1 (en) | 1990-11-15 |
Family
ID=6308371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT87111895T ATE57893T1 (en) | 1986-08-28 | 1987-08-17 | METHOD FOR SUPPLYING ENERGY TO A THREE-PHASE MOTOR OF A HOIST AND EQUIPMENT FOR CARRYING OUT THE METHOD. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0259656B1 (en) |
AT (1) | ATE57893T1 (en) |
DE (1) | DE3765896D1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4138596A1 (en) * | 1991-11-23 | 1993-05-27 | Buehne Werner Abus Kg | LIFTING WORKING WITH VARIABLE LIFTING SPEED |
DE4440420C3 (en) * | 1994-11-07 | 2003-07-24 | Demag Cranes & Components Gmbh | Method and device for monitoring and / or controlling the speed of an electric drive with frequency converter for hoists |
DE102007062609A1 (en) * | 2007-12-22 | 2009-06-25 | Aac-Concept Gmbh | Method for operating asynchronous motor, involves calculating changing current frequency with continuously detected motor torque on basis of load dependent speed characteristic |
ATE546878T1 (en) | 2009-12-01 | 2012-03-15 | Konecranes Plc | ENGINE CONTROL SYSTEM FOR A HOIST DRIVE |
EP2921448B1 (en) | 2014-03-18 | 2016-05-18 | ABB Technology Oy | Method for operating winch, and winch |
CN105439022B (en) * | 2014-08-05 | 2017-12-05 | 北京金顺帆科技有限公司 | A kind of helicopter hoist control system |
CN111847254A (en) * | 2020-08-21 | 2020-10-30 | 义乌恒邦建筑智能科技有限公司 | Power measurement and control method and system for multi-frequency-conversion operation electric energy of tower crane |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS499858B1 (en) * | 1968-11-29 | 1974-03-07 | ||
US3940110A (en) * | 1974-04-12 | 1976-02-24 | Kenro Motoda | Lifting apparatus |
DE3048097A1 (en) * | 1980-12-19 | 1982-07-29 | Loher Gmbh, 8399 Ruhstorf | Control circuit for asynchronous rotating machine - monitors supply frequency and machine speed to restart if necessary (NL 16.07.82) |
-
1987
- 1987-08-17 EP EP87111895A patent/EP0259656B1/en not_active Expired - Lifetime
- 1987-08-17 AT AT87111895T patent/ATE57893T1/en active
- 1987-08-17 DE DE8787111895T patent/DE3765896D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0259656A1 (en) | 1988-03-16 |
EP0259656B1 (en) | 1990-10-31 |
DE3765896D1 (en) | 1990-12-06 |
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