EP0770573A3 - Device for measuring the load for a lifting device - Google Patents

Device for measuring the load for a lifting device Download PDF

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Publication number
EP0770573A3
EP0770573A3 EP96112970A EP96112970A EP0770573A3 EP 0770573 A3 EP0770573 A3 EP 0770573A3 EP 96112970 A EP96112970 A EP 96112970A EP 96112970 A EP96112970 A EP 96112970A EP 0770573 A3 EP0770573 A3 EP 0770573A3
Authority
EP
European Patent Office
Prior art keywords
hoist
load
excited
measuring
rotating field
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP96112970A
Other languages
German (de)
French (fr)
Other versions
EP0770573A2 (en
Inventor
Georg Gschlössl
Steffen Dipl.-Ing. Ley (Fh)
Heiko Dipl.-Ing. Fischer (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN GHH Logistics GmbH
Original Assignee
MAN GHH Logistics GmbH
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 MAN GHH Logistics GmbH filed Critical MAN GHH Logistics GmbH
Publication of EP0770573A2 publication Critical patent/EP0770573A2/en
Publication of EP0770573A3 publication Critical patent/EP0770573A3/en
Withdrawn legal-status Critical Current

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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
    • B66D1/54—Safety gear
    • B66D1/58—Safety gear responsive to excess of load

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

Es wird eine Lasterfassungseinrichtung (39) für ein Hubwerk vorgeschlagen, wobei eine Elektromotoranordnung (11) des Hubwerks wenigstens zwei Drehfeldwicklungen (27, 28) mit unterschiedlicher Polzahl aufweist, von denen eine für den Antrieb des Hubwerks erregbar ist. Die Erfindung ist gekennzeichnet durch Mittel (41) zur Erfassung eines in einer anderen als der erregten Drehfeldwicklung (27, 28) bei Rotation induzierten Signals (40) und durch Mittel (55) zur Bestimmung der Momentanfrequenz einer vorbestimmten Spektralspitze des Frequenzspektrums des induzierten Signals (40) als ein Maß für die momentane Belastung des Hubwerks.

Figure 00000001
A load detection device (39) for a hoist is proposed, an electric motor arrangement (11) of the hoist having at least two rotating field windings (27, 28) with different numbers of poles, one of which can be excited to drive the hoist. The invention is characterized by means (41) for detecting a signal (40) induced in a rotating field winding (27, 28) other than the excited one during rotation and by means (55) for determining the instantaneous frequency of a predetermined spectral peak of the frequency spectrum of the induced signal ( 40) as a measure of the momentary load on the hoist.
Figure 00000001
EP96112970A 1995-10-26 1996-08-12 Device for measuring the load for a lifting device Withdrawn EP0770573A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19539927 1995-10-26
DE19539927A DE19539927A1 (en) 1995-10-26 1995-10-26 Load detection device for a hoist

Publications (2)

Publication Number Publication Date
EP0770573A2 EP0770573A2 (en) 1997-05-02
EP0770573A3 true EP0770573A3 (en) 1998-09-09

Family

ID=7775874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96112970A Withdrawn EP0770573A3 (en) 1995-10-26 1996-08-12 Device for measuring the load for a lifting device

Country Status (2)

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EP (1) EP0770573A3 (en)
DE (1) DE19539927A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19802674C2 (en) * 1998-01-24 2001-05-10 Michael Ertl Method for weight measurement of loads in lifting devices
DE102018123150B4 (en) * 2018-09-20 2021-04-15 Johannes Hübner Fabrik elektrischer Maschinen GmbH Rotary encoder and method for operating a hoist
CN112125143B (en) * 2020-09-23 2023-05-23 国网安徽省电力有限公司经济技术研究院 Multi-point type supporting and lifting device for electric power iron tower installation construction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1538806A1 (en) * 1966-07-20 1970-01-02 Grundig Emv Method and circuit arrangement for the digital control of machine tools and the like.
DE2850581A1 (en) * 1978-11-22 1980-05-29 Demag Ag Mannesmann HOIST WITH POLE-SWITCHABLE SHORT-CIRCUIT MOTOR
DE3623755A1 (en) * 1986-07-15 1988-02-18 Abus Kg Device for overload protection of electrical drives
US4761703A (en) * 1987-08-31 1988-08-02 Electric Power Research Institute, Inc. Rotor fault detector for induction motors
US5680025A (en) * 1994-10-07 1997-10-21 Csi Technology, Inc. Proactive motor monitoring for avoiding premature failures and for fault recognition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336595A (en) * 1977-08-22 1982-06-22 Lockheed Corporation Structural life computer
DE3048964A1 (en) * 1980-12-24 1982-07-08 Mannesmann AG, 4000 Düsseldorf METHOD AND DEVICE FOR DETERMINING THE LOAD OF A LIFTER

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1538806A1 (en) * 1966-07-20 1970-01-02 Grundig Emv Method and circuit arrangement for the digital control of machine tools and the like.
DE2850581A1 (en) * 1978-11-22 1980-05-29 Demag Ag Mannesmann HOIST WITH POLE-SWITCHABLE SHORT-CIRCUIT MOTOR
DE3623755A1 (en) * 1986-07-15 1988-02-18 Abus Kg Device for overload protection of electrical drives
US4761703A (en) * 1987-08-31 1988-08-02 Electric Power Research Institute, Inc. Rotor fault detector for induction motors
US5680025A (en) * 1994-10-07 1997-10-21 Csi Technology, Inc. Proactive motor monitoring for avoiding premature failures and for fault recognition

Also Published As

Publication number Publication date
DE19539927A1 (en) 1997-04-30
EP0770573A2 (en) 1997-05-02

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