EP0544084A2 - Hoisting device with variable lifting speed - Google Patents

Hoisting device with variable lifting speed Download PDF

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Publication number
EP0544084A2
EP0544084A2 EP92117055A EP92117055A EP0544084A2 EP 0544084 A2 EP0544084 A2 EP 0544084A2 EP 92117055 A EP92117055 A EP 92117055A EP 92117055 A EP92117055 A EP 92117055A EP 0544084 A2 EP0544084 A2 EP 0544084A2
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Prior art keywords
phase
network
frequency
load
lifting speed
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EP92117055A
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German (de)
French (fr)
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EP0544084B1 (en
EP0544084A3 (en
Inventor
Werner Dipl.-Ing. Bühne
Eckhard Dipl.-Ing. Bube
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ABUS Kransysteme GmbH
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ABUS Kransysteme GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor

Definitions

  • the invention relates to a hoist working with variable lifting speed, which is driven by an asynchronous motor with a squirrel-cage rotor, which is preceded by a frequency converter, which is fed on the network side from a single or multi-phase AC network and from the load side, a three-phase network is fed, from which the hoist driving asynchronous motor is supplied.
  • the three-phase drive that is by far the most frequently used, in particular because of its simple structure, is the asynchronous motor with squirrel-cage rotor.
  • One of its disadvantages is that its speed is proportional to the frequency of the three-phase supply network and inversely proportional to its number of pole pairs, so it cannot be changed if it is supplied from a three-phase network without the interposition of control elements. If the fed three-phase system has a frequency of 50 Hz, the maximum speed of the asynchronous motor is limited to 3000 rpm, the lifting speed of a hoist is limited in proportion to this speed.
  • a hoist of the type mentioned is known from DE-A-3 513 773.
  • the frequency converter is a transistor pulse inverter.
  • the frequency converter contains a part with rectifier and low-voltage power supply.
  • the rectifier supplies DC voltage to a transistor inverter without additional switching elements.
  • Both the part with rectifier and low-voltage power supply and the transistor inverter are controlled by control and regulating electronics.
  • a feed network for a three-phase motor is connected to the transistor inverter, which can be an asynchronous motor with a squirrel-cage rotor.
  • the known frequency converter is a converter with a constant DC link voltage.
  • the three-phase motor he feeds drives an elevator.
  • the problems that arise are: The drive car should move into the breakpoints in the correct position and come to a standstill, even under different loads. Jerky start-up and start-up procedures should be avoided.
  • the lifting device described in claim 1 solves the problem of supplying the asynchronous motor with squirrel-cage rotor with three-phase network to be lifted by the lifting device with nominal lifting speed at nominal frequency, with reduced load to increase the lifting speed with a frequency which is increased by two to three times Food. This task does not occur in the known drive. It is therefore not addressed there, let alone solved.
  • a voltage intermediate circuit converter consists of a line-side and a load-side converter, which are connected to each other via an intermediate circuit.
  • the intermediate circuit consists of a capacitive and / or inductive energy store. It decouples the load from the network.
  • the DC link carries an impressed voltage.
  • the voltage intermediate circuit converter used according to the invention has an input converter and a self-commutated inverter, which are connected to one another via a DC voltage intermediate circuit.
  • the input converter rectifies the mains voltage from an AC circuit and sets the voltage in the DC link.
  • the voltage intermediate circuit converter is a converter with variable intermediate circuit voltage. It undergoes two forms of energy conversion: the AC voltage from the single-phase or multi-phase AC network is converted into a DC voltage.
  • a three-phase frequency variable voltage is generated from the DC voltage.
  • the asynchronous motor is fed from the three-phase network of variable frequency. This makes it possible to raise the rotating field feeding the asynchronous motor by a multiple of the mains frequency, that is the frequency of the alternating voltage from the single-phase or multiphase alternating current network.
  • a controller is provided between the load-side three-phase network and the voltage intermediate circuit converter, by means of which the frequency of the three-phase network supplied by the voltage intermediate circuit converter is limited if the frequency supplied by the voltage intermediate circuit converter to the three-phase network exceeds the nominal frequency, depending on the torque required by the asynchronous motor in proportion to the load to be lifted. the maximum value of which is clearly above the value of the single-phase or multi-phase AC network.
  • a single or multi-phase AC network 1 forms the feeding network for the entire arrangement.
  • the AC network 1 has constant voltage and constant frequency.
  • a voltage intermediate circuit converter 2 is connected to the AC network 1 on the network side.
  • the voltage intermediate circuit converter 2 has an input converter 21 and a self-commutated inverter 22, which are connected to one another via a DC voltage intermediate circuit 23.
  • the DC voltage intermediate circuit 23 has a smoothing choke 24 in its connecting line between the input converter 21 and the self-commutated inverter; a capacitor 25 in parallel between the connecting lines.
  • the input converter 21 directs the line voltage from the AC circuit 1 is the same and sets the voltage in the intermediate circuit 23.
  • the self-commutated inverter 22 fed from the DC voltage intermediate circuit 23 generates a three-phase network 3 by driving six power semiconductors, which is connected on the load side to an asynchronous motor 4 with a short-circuit rotor.
  • the frequency of the three-phase network 3 is variable.
  • the speed of the asynchronous motor 4 changes as a function of the frequency of the three-phase network 3.
  • a hoist 5 is mechanically driven by the asynchronous motor 4.
  • the direction of rotation of the asynchronous motor 4 is reversible, consequently the hoist 5 can be raised and lowered, specifically because of the different frequency and thus the different speed of the asynchronous motor 4 with different lifting speeds.
  • the following control circuit is additionally provided: the current I, which is dependent on the load to be lifted and thus on the torque required by the motor, is compared with an - adjustable - current I max ; the difference value is fed to a two-point controller 6 for current limitation.
  • the two-point controller 6 is followed by a control logic 7, which in turn is connected to the direct current part of the inverter 22. Further variables supplied to the control logic 7 can be the output signal of a fault monitor and the output signal of a two-point flow controller.
  • the additional control loop is used to ensure that the mechanical design of the hoist is not overwhelmed by increasing the lifting speed at full load.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

A hoisting device (5) which is driven by a three-phase asynchronous motor (4) having a squirrel-cage rotor is intended to be driven with a variable lifting speed from a single-phase or multi-phase AC network (1). This is possible as a result of a voltage intermediate-circuit converter (2) which is supplied on the network side from the single-phase or multi-phase AC network (1) and, on the load side, supplies a three-phase network (3) to which the asynchronous motor (4) is connected. The frequency of the three-phase network (3), and hence also the lifting speed of the hoisting device, can be higher than the frequency of the single-phase or multi-phase AC network (1) and the lifting speed resulting therefrom. Provided between the three-phase network (3) and the voltage intermediate-circuit converter (2) is a regulator (6) which limits the maximum frequency in a load-dependent manner. <IMAGE>

Description

Die Erfindung betrifft ein mit variabler Hubgeschwindigkeit arbeitendes Hebezeug, das von einem Asynchronmotor mit Kurzschlußläufer angetrieben ist, dem ein Frequenzumrichter vorgeschaltet ist, der netzseitig aus einem ein- oder mehrphasigen Wechselstromnetz gespeist ist und aus dem lastseitig ein Drehstromnetz gespeist ist, aus dem der das Hebezeug antreibende Asynchronmotor versorgt ist.The invention relates to a hoist working with variable lifting speed, which is driven by an asynchronous motor with a squirrel-cage rotor, which is preceded by a frequency converter, which is fed on the network side from a single or multi-phase AC network and from the load side, a three-phase network is fed, from which the hoist driving asynchronous motor is supplied.

Der insbesondere wegen seines einfachen Aufbaus bei weitem am häufigsten verwendete Drehstromantrieb ist der Asynchronmotor mit Kurzschlußläufer. Einer seiner Nachteile besteht darin, daß seine Drehzahl proportional der Frequenz des speisenden Drehstromnetzes und umgekehrt proportional seiner Polpaarzahl ist, also nicht veränderbar ist, wenn er ohne Zwischenschaltung von Steuergliedern aus einem Drehstromnetz gespeist wird. Hat das gespeiste Drehstromnetz eine Frequenz von 50 Hz, so ist die maximale Drehzahl des Asynchronmotors auf 3000 U/min, die Hubgeschwindigkeit eines Hebezeugs proportional zu dieser Drehzahl begrenzt.The three-phase drive that is by far the most frequently used, in particular because of its simple structure, is the asynchronous motor with squirrel-cage rotor. One of its disadvantages is that its speed is proportional to the frequency of the three-phase supply network and inversely proportional to its number of pole pairs, so it cannot be changed if it is supplied from a three-phase network without the interposition of control elements. If the fed three-phase system has a frequency of 50 Hz, the maximum speed of the asynchronous motor is limited to 3000 rpm, the lifting speed of a hoist is limited in proportion to this speed.

Ein Hebezeug der eingangs genannten Art ist aus DE-A-3 513 773 bekannt. Bei dem bekannten Hebezeug ist der Frequenzumrichter ein Transistorpulswechselrichter. Der Frequenzumrichter enthält einen Teil mit Gleichrichter und Niederspannungsnetzteil. Der Gleichrichter liefert - ohne zusätzliche Schaltelemente - an einen Transistorwechselrichter Gleichspannung. Sowohl der Teil mit Gleichrichter und Niederspannungsnetzteil als auch der Transistorwechselrichter werden von einer Steuer- und Regelelektronik geführt. Mit dem Transistorwechselrichter ist ausgangsseitig ein Speisenetz für einen Drehstrommotor verbunden, bei dem es sich um einen Asynchronmotor mit Käfigläufer handeln kann. Der bekannte Frequenzumrichter ist ein Umrichter mit konstanter Zwischenkreisspannung. Der von ihm gespeiste Drehstrommotor treibt einen Aufzug an. Die dabei auftretenden Probleme sind: Der Fahrkorb des Antriebs soll positionsgenau in die Haltepunkte einfahren und zum Stillstand kommen, und zwar auch bei unterschiedlicher Belastung. Ruckartige Einfahr- und Anfahrvorgänge sollen vermieden werden.A hoist of the type mentioned is known from DE-A-3 513 773. In the known hoist, the frequency converter is a transistor pulse inverter. The frequency converter contains a part with rectifier and low-voltage power supply. The rectifier supplies DC voltage to a transistor inverter without additional switching elements. Both the part with rectifier and low-voltage power supply and the transistor inverter are controlled by control and regulating electronics. On the output side, a feed network for a three-phase motor is connected to the transistor inverter, which can be an asynchronous motor with a squirrel-cage rotor. The known frequency converter is a converter with a constant DC link voltage. The three-phase motor he feeds drives an elevator. The problems that arise are: The drive car should move into the breakpoints in the correct position and come to a standstill, even under different loads. Jerky start-up and start-up procedures should be avoided.

Demgegenüber wird mit dem im Patentanspruch 1 beschriebenen Hebezeug die Aufgabe gelöst, das den Asynchronmotor mit Kurzschlußläufer versorgende Drehstromnetz bei vom Hebezeug mit Nenn-Hubgeschwindigkeit zu hebender Last mit Nennfrequenz, bei reduzierter Last zur Erhöhung der Hubgeschwindigkeit mit um das zwei- bis dreifache erhöhter Frequenz zu speisen. Diese Aufgabe tritt bei dem bekannten Antrieb nicht auf. Sie ist dort folglich auch nicht angesprochen, geschweige denn gelöst.In contrast, the lifting device described in claim 1 solves the problem of supplying the asynchronous motor with squirrel-cage rotor with three-phase network to be lifted by the lifting device with nominal lifting speed at nominal frequency, with reduced load to increase the lifting speed with a frequency which is increased by two to three times Food. This task does not occur in the known drive. It is therefore not addressed there, let alone solved.

Ein Spannungszwischenkreisumrichter besteht aus einem netzseitigen und einem lastseitigen Stromrichter, die über einen Zwischenkreis miteinander verbunden sind. Der Zwischenkreis besteht aus einem kapazitiven und/oder induktiven Energiespeicher. Er bewirkt eine Entkopplung zwischen Last und Netz. Der Zwischenkreis führt eine eingeprägte Spannung. Der erfindungsgemäß verwendete Spannungszwischenkreisumrichter weist einen Eingangsstromrichter sowie einen selbstgeführten Wechselrichter auf, die über einen Gleichspannungszwischenkreis miteinander verbunden sind. Der Eingangsstromrichter richtet die Netzspannung aus einem Wechselstromkreis gleich und stellt die Spannung im Zwischenkreis ein. Der Spannungszwischenkreisumrichter ist ein Umrichter mit variabler Zwischenkreisspannung. In ihm erfolgt eine zweimalige Energieumformung: Die Wechselspannung aus dem ein- oder mehrphasigen Wechselstromnetz wird in eine Gleichspannung umgeformt. Aus der Gleichspannung wird ein Drehstrom frequenzvariabler Spannung erzeugt. Aus dem Drehstromnetz variabler Frequenz wird der Asynchronmotor gespeist. Damit ist es möglich, das den Asynchronmotor speisende Drehfeld um ein Vielfaches gegenüber der Netzfrequenz, das ist die Frequenz der Wechselspannung aus dem ein- oder mehrphasigen Wechselstromnetz, anzuheben.A voltage intermediate circuit converter consists of a line-side and a load-side converter, which are connected to each other via an intermediate circuit. The intermediate circuit consists of a capacitive and / or inductive energy store. It decouples the load from the network. The DC link carries an impressed voltage. The voltage intermediate circuit converter used according to the invention has an input converter and a self-commutated inverter, which are connected to one another via a DC voltage intermediate circuit. The input converter rectifies the mains voltage from an AC circuit and sets the voltage in the DC link. The voltage intermediate circuit converter is a converter with variable intermediate circuit voltage. It undergoes two forms of energy conversion: the AC voltage from the single-phase or multi-phase AC network is converted into a DC voltage. A three-phase frequency variable voltage is generated from the DC voltage. The asynchronous motor is fed from the three-phase network of variable frequency. This makes it possible to raise the rotating field feeding the asynchronous motor by a multiple of the mains frequency, that is the frequency of the alternating voltage from the single-phase or multiphase alternating current network.

Um die mechanische Konstruktion des verwendeten Hebezeugs durch die Anhebung der Hubgeschwindigkeit bei voller Last nicht zu überfordern, wird in Ausgestaltung der Erfindung ein lastabhängiger überlagerter Regelkreis aktiviert:
Zwischen dem lastseitigen Drehstromnetz und dem Spannungszwischenkreisumrichter ist ein Regler vorgesehen, über den bei über der Nennfrequenz liegender vom Spannungszwischenkreisumrichter an das Drehstromnetz gelieferter Frequenz in Abhängigkeit von dem vom Asynchronmotor proportional zu der zu hebenden Last geforderten Drehmoment die vom Spannungszwischenkreisumrichter gelieferte Frequenz des Drehstromnetzes begrenzt ist, wobei deren Maximalwert deutlich über dem Wert des ein- oder mehrphasigen Wechselstromnetzes liegt.In order not to overwhelm the mechanical design of the hoist used by increasing the lifting speed at full load, a load-dependent, superimposed control loop is activated in one embodiment of the invention:
A controller is provided between the load-side three-phase network and the voltage intermediate circuit converter, by means of which the frequency of the three-phase network supplied by the voltage intermediate circuit converter is limited if the frequency supplied by the voltage intermediate circuit converter to the three-phase network exceeds the nominal frequency, depending on the torque required by the asynchronous motor in proportion to the load to be lifted. the maximum value of which is clearly above the value of the single-phase or multi-phase AC network.

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden nachfolgend im einzelnen beschrieben. Es zeigen:

Figur 1
ein von einem Asynchronmotor angetriebenes Hebezeug mit zugehörigem Schaltbild;
Figur 2
ein weiteres von einem Asynchronmotor angetriebenes Hebezeug mit zugehörigem Schaltbild, bei dem ein zusätzlicher Regelkreis vorgesehen ist.
Two embodiments of the invention are shown in the drawing and are described in detail below. Show it:
Figure 1
a hoist driven by an asynchronous motor with associated circuit diagram;
Figure 2
another asynchronous motor driven hoist with associated circuit diagram, in which an additional control loop is provided.

Ein ein- oder mehrphasiges Wechselstromnetz 1 bildet das speisende Netz für die gesamte Anordnung. Das Wechselstromnetz 1 hat konstante Spannung und konstante Frequenz. Mit dem Wechselstromnetz 1 ist netzseitig ein Spannungszwischenkreisumrichter 2 verbunden. Der Spannungszwischenkreisumrichter 2 weist einen Eingangsstromrichter 21 sowie einen selbstgeführten Wechselrichter 22 auf, die über einen Gleichspannungszwischenkreis 23 miteinander verbunden sind. Der Gleichspannungszwischenkreis 23 weist in seiner Verbindungsleitung zwischen dem Eingangsstromrichter 21 und dem selbstgeführten Wechselrichter eine Glättungsdrossel 24; parallel zwischen den Verbindungsleitungen einen Kondensator 25 auf. Der Eingangsstromrichter 21 richtet die Netzspannung aus dem Wechselstromkreis 1 gleich und stellt die Spannung im Zwischenkreis 23 ein. Der aus dem Gleichspannungszwischenkreis 23 gespeiste selbstgeführte Wechselrichter 22 erzeugt durch Ansteuern von sechs Leistungshalbleitern ein Drehstromnetz 3, das lastseitig mit einem Asynchronmotor 4 mit Kurzschlußläufer verbunden ist. Die Frequenz des Drehstromnetzes 3 ist variabel. In Abhängigkeit von der Frequenz des Drehstromnetzes 3 ändert sich die Drehzahl des Asynchronmotors 4.A single or multi-phase AC network 1 forms the feeding network for the entire arrangement. The AC network 1 has constant voltage and constant frequency. A voltage intermediate circuit converter 2 is connected to the AC network 1 on the network side. The voltage intermediate circuit converter 2 has an input converter 21 and a self-commutated inverter 22, which are connected to one another via a DC voltage intermediate circuit 23. The DC voltage intermediate circuit 23 has a smoothing choke 24 in its connecting line between the input converter 21 and the self-commutated inverter; a capacitor 25 in parallel between the connecting lines. The input converter 21 directs the line voltage from the AC circuit 1 is the same and sets the voltage in the intermediate circuit 23. The self-commutated inverter 22 fed from the DC voltage intermediate circuit 23 generates a three-phase network 3 by driving six power semiconductors, which is connected on the load side to an asynchronous motor 4 with a short-circuit rotor. The frequency of the three-phase network 3 is variable. The speed of the asynchronous motor 4 changes as a function of the frequency of the three-phase network 3.

Von dem Asynchronmotor 4 ist mechanisch ein Hebezeug 5 angetrieben. Die Drehrichtung des Asynchronmotors 4 ist umkehrbar, folglich das Hebezeug 5 heb- und senkbar, und zwar wegen der unterschiedlichen Frequenz und damit der unterschiedlichen Drehzahl des Asynchronmotors 4 mit unterschiedlicher Hubgeschwindigkeit. Insbesondere ist es möglich, ein Hebezeug bei gegenüber der Nennlast reduzierter Last mit deutlich über der Nenn-Hubgeschwindigkeit liegender Hubgeschwindigkeit zu betreiben.A hoist 5 is mechanically driven by the asynchronous motor 4. The direction of rotation of the asynchronous motor 4 is reversible, consequently the hoist 5 can be raised and lowered, specifically because of the different frequency and thus the different speed of the asynchronous motor 4 with different lifting speeds. In particular, it is possible to operate a hoist with a load that is reduced compared to the nominal load with a lifting speed that is significantly above the nominal lifting speed.

Bei dem in Figur 2 dargestellten Hebezeug ist zusätzlich folgender Regelkreis vorgesehen: Der von der zu hebenden Last und damit von dem vom Motor geforderten Drehmoment abhängige Strom I wird mit einem - einstellbaren - Strom Imax verglichen; der Differenzwert einem Zweipunktregler 6 zur Strombegrenzung zugeführt. Dem Zweipunktregler 6 ist eine Ansteuerlogik 7 nachgeordnet, die ihrerseits mit dem Gleichstromteil des Wechselrichters 22 verbunden ist. Weitere, der Ansteuerlogik 7 zugeführte Größen können das Ausgangssignal einer Störungsüberwachung und das Ausgangssignal eines Zweipunkt-Flußreglers sein. Der zusätzliche Regelkreis dient dazu, die mechanische Konstruktion des Hebezeugs durch eine Anhebung der Hubgeschwindigkeit bei voller Last nicht zu überfordern.In the hoist shown in FIG. 2, the following control circuit is additionally provided: the current I, which is dependent on the load to be lifted and thus on the torque required by the motor, is compared with an - adjustable - current I max ; the difference value is fed to a two-point controller 6 for current limitation. The two-point controller 6 is followed by a control logic 7, which in turn is connected to the direct current part of the inverter 22. Further variables supplied to the control logic 7 can be the output signal of a fault monitor and the output signal of a two-point flow controller. The additional control loop is used to ensure that the mechanical design of the hoist is not overwhelmed by increasing the lifting speed at full load.

Claims (2)

Mit variabler Hubgeschwindigkeit arbeitendes Hebezeug (5), das von einem Asynchronmotor (4) mit Kurzschlußläufer angetrieben ist, dem ein Frequenzumrichter vorgeschaltet ist, der netzseitig aus einem ein- oder mehrphasigen Wechselstromnetz (1) gespeist ist und aus dem lastseitig ein Drehstromnetz (3) gespeist ist, aus dem der das Hebezeug (5) antreibende Asynchronmotor (4) versorgt ist, gekennzeichnet durch einen Spannungszwischenkreisumrichter (2) als Frequenzumrichter, aus dem das lastseitige Drehstromnetz (3) bei vom Hebezeug mit Nenn-Hubgeschwindigkeit zu hebender Last mit Nennfrequenz, bei reduzierter Last zur Erhöhung der Hubgeschwindigkeit mit um das bis zwei- bis dreifache erhöhter Frequenz gespeist ist.Hoist (5) operating at variable lifting speed, which is driven by an asynchronous motor (4) with a squirrel-cage rotor, which is preceded by a frequency converter, which is fed on the network side from a single or multi-phase AC network (1) and a three-phase network (3) from the load side is fed, from which the asynchronous motor (4) driving the hoist (5) is supplied, characterized by a voltage intermediate circuit converter (2) as a frequency converter, from which the load-side three-phase network (3) at a load to be lifted by the hoist with nominal lifting speed with nominal frequency, at a reduced load to increase the lifting speed with a frequency that is increased by two to three times. Hebezeug nach Anspruch 1, dadurch gekennzeichnet, daß zwischen dem lastseitigen Drehstromnetz (3) und dem Spannungszwischenkreisumrichter (2) ein Regler (6) vorgesehen ist, über den bei über der Nennfrequenz liegender vom Spannungszwischenkreisumrichter an das Drehstromnetz gelieferter Frequenz in Abhängigkeit von dem vom Asynchronmotor (4) proportional zu der zu hebenden Last geforderten Drehmoment die vom Spannungszwischenkreisumrichter (2) gelieferte Frequenz des Drehstromnetzes (3) begrenzt ist, wobei deren Maximalwert deutlich über dem Wert des ein- oder mehrphasigen Wechselstromnetzes (1) liegt.Lifting device according to claim 1, characterized in that a controller (6) is provided between the load-side three-phase network (3) and the voltage intermediate circuit converter (2), via which the frequency supplied by the voltage intermediate circuit converter to the three-phase network is above the nominal frequency depending on that of the asynchronous motor (4) proportional to the torque to be lifted, the frequency of the three-phase network (3) supplied by the voltage intermediate circuit converter (2) is limited, the maximum value of which is significantly above the value of the single-phase or multi-phase AC network (1).
EP92117055A 1991-11-23 1992-10-06 Hoisting device with variable lifting speed Revoked EP0544084B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4138596 1991-11-23
DE4138596A DE4138596A1 (en) 1991-11-23 1991-11-23 LIFTING WORKING WITH VARIABLE LIFTING SPEED

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EP0544084A2 true EP0544084A2 (en) 1993-06-02
EP0544084A3 EP0544084A3 (en) 1993-08-04
EP0544084B1 EP0544084B1 (en) 1995-07-19

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EP92117055A Revoked EP0544084B1 (en) 1991-11-23 1992-10-06 Hoisting device with variable lifting speed

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DE (2) DE4138596A1 (en)
ES (1) ES2077320T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005092763A1 (en) * 2004-02-27 2005-10-06 Thyssen Elevator Capital Corp. Method and apparatus for reducing the energy consumption of elevators equipped with scr drives
CN101860306A (en) * 2010-03-23 2010-10-13 杭州双华科技有限公司 Speed control module and speed control circuit of brush direct-current tubular motor
EP2261165A1 (en) 2009-06-10 2010-12-15 Manitowoc Crane Group France Method for adapting the power of a hoisting winch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400336A1 (en) * 1994-01-07 1995-07-13 Liebherr Werk Biberach Gmbh Controllable hydrostatic drive, preferably crane drive
DE4413196C2 (en) * 1994-04-14 1998-01-15 Mannesmann Ag Process for controlling an inverter-fed asynchronous machine in field weakening mode
DE10259231B4 (en) * 2002-12-17 2004-09-23 Hydro Aluminium Deutschland Gmbh Method and device for cooling metal castings
WO2006005774A1 (en) * 2004-06-14 2006-01-19 Juan Jose Azurmendi Inchausti Traction system for lifts, escalators, moving walkways and aerogenerators, which is equipped with an asynchronous motor, and asynchronous motor for said traction system
DE102006060823A1 (en) * 2006-12-21 2008-07-03 Bubenzer Bremsen Gerhard Bubenzer Ing. Gmbh Electric control for a braking device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4501343A (en) * 1982-10-12 1985-02-26 Otis Elevator Company Elevator car load and position dynamic gain compensation
EP0198249A1 (en) * 1985-04-17 1986-10-22 Arnold Müller GmbH &amp; Co. KG AC control drive, in particular for a lift
WO1988001450A1 (en) * 1986-08-22 1988-02-25 Otis Elevator Company Alternating current motor control apparatus
EP0259656A1 (en) * 1986-08-28 1988-03-16 Siemens Aktiengesellschaft Process for supplying power to a three-phase motor of a lifting device, and device for carrying out the process
DE4038981A1 (en) * 1990-12-06 1992-06-11 Man Ghh Logistics Frequency changer for AC crane motors - uses equivalent circuit data to compute torque and to avoid approaching pull=out torque

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4501343A (en) * 1982-10-12 1985-02-26 Otis Elevator Company Elevator car load and position dynamic gain compensation
EP0198249A1 (en) * 1985-04-17 1986-10-22 Arnold Müller GmbH &amp; Co. KG AC control drive, in particular for a lift
WO1988001450A1 (en) * 1986-08-22 1988-02-25 Otis Elevator Company Alternating current motor control apparatus
EP0259656A1 (en) * 1986-08-28 1988-03-16 Siemens Aktiengesellschaft Process for supplying power to a three-phase motor of a lifting device, and device for carrying out the process
DE4038981A1 (en) * 1990-12-06 1992-06-11 Man Ghh Logistics Frequency changer for AC crane motors - uses equivalent circuit data to compute torque and to avoid approaching pull=out torque

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HITACHI REVIEW Bd. 38, Nr. 6, Dezember 1989, TOKYO JP Seiten 323 - 330 , XP000102887 YOSHIO SAKAI 'Ultrahigh Speed Elevators Controlled by Inverters' *
REGELUNGSTECHNIK Bd. 28, Nr. 4, April 1980, MUNCHEN DE Seiten 110 - 116 J. SCHÖRNER 'Regelung von Drehstrom-Aufzuganlagen mit Drehstromsteller' *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005092763A1 (en) * 2004-02-27 2005-10-06 Thyssen Elevator Capital Corp. Method and apparatus for reducing the energy consumption of elevators equipped with scr drives
EP2261165A1 (en) 2009-06-10 2010-12-15 Manitowoc Crane Group France Method for adapting the power of a hoisting winch
FR2946635A1 (en) * 2009-06-10 2010-12-17 Manitowoc Crane Group France METHOD FOR ADAPTING THE POWER OF A LIFTING WINCH
CN101860306A (en) * 2010-03-23 2010-10-13 杭州双华科技有限公司 Speed control module and speed control circuit of brush direct-current tubular motor
CN101860306B (en) * 2010-03-23 2013-05-01 杭州双华科技有限公司 Speed control module and speed control circuit of brush direct-current tubular motor

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EP0544084B1 (en) 1995-07-19
DE59202950D1 (en) 1995-08-24
EP0544084A3 (en) 1993-08-04
DE4138596A1 (en) 1993-05-27
ES2077320T3 (en) 1995-11-16

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