DE3001399A1 - Drive system for hoist or lift - has emergency braking device shorting together terminals of DC motor when supply fails - Google Patents

Drive system for hoist or lift - has emergency braking device shorting together terminals of DC motor when supply fails

Info

Publication number
DE3001399A1
DE3001399A1 DE19803001399 DE3001399A DE3001399A1 DE 3001399 A1 DE3001399 A1 DE 3001399A1 DE 19803001399 DE19803001399 DE 19803001399 DE 3001399 A DE3001399 A DE 3001399A DE 3001399 A1 DE3001399 A1 DE 3001399A1
Authority
DE
Germany
Prior art keywords
motor
braking device
emergency braking
rectifier
terminals
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Withdrawn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
DE19803001399
Other languages
German (de)
Inventor
Hans-Joachim Dipl.-Ing. 7430 Metzingen Blocher
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.)
Blocher Motor & Co KG GmbH
Original Assignee
Blocher Motor & Co KG 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 Blocher Motor & Co KG GmbH filed Critical Blocher Motor & Co KG GmbH
Priority to DE19803001399 priority Critical patent/DE3001399A1/en
Publication of DE3001399A1 publication Critical patent/DE3001399A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P3/00Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/08Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
    • H02P3/12Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by short-circuit or resistive braking

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)

Abstract

The drive system has a d.c. motor and an emergency braking device. The motor (2) is permanently excited. The emergency braking device (6,8) has a braking current path (6,7) that automatically bridges the motor's terminals when the motor's power supply fails. The motor is supplied from a controlled rectifier (3) connected to a mains supply (5). The rectifier is controlled (4) to give the motor the required speed and torque. The emergency braking device comprises a relay (8) that operates when either the mains or the rectifier fails. The relay's contacts (7) connect a load resistor (6) across the motor's supply terminals and disconnect these terminals from the output of the rectifier.

Description

Auf zugsantrieb Elevator drive

Die Erfindung betrifft einen Aufzugsantrieb mit einem Gleichstrommotor und einer Notbremseinrichtung.The invention relates to an elevator drive with a direct current motor and an emergency braking device.

Die bekannten Aufzugsantriebe dieser Art, bei denen der Gleichstrommotor mittels eines Leonard-Umformers gespeist wird, haben zwar eine gute Drehzahlregelbarkeit. Sie sind jedoch aufwendig. Außerdem muß die Notbremseinrichtung als mechanische Bremse ausgebildet sein. Weniger aufwendig sind zwar diejenigen Aufzugsantriebe, bei denen der Gleichstrommotor von einem steuerbaren Gleichrichter gespeist wird.The known elevator drives of this type, in which the DC motor is fed by a Leonard converter, have a good speed controllability. However, they are complex. In addition, the emergency braking device must be mechanical Be formed brake. Those elevator drives are less complex, in which the DC motor is fed by a controllable rectifier.

Aber auch bei diesen Antrieben benötigt man fUr die Notbremseinrichtung eine mechanische Bremse. Ferner ist die Gertuschentwicklung hkufig störend.But even with these drives you need for the emergency braking device a mechanical brake. In addition, the development of Gertusch is often disruptive.

Der Erfindung liegt die Aufgabe zugrunde, einen Aufzugsantrieb zu schaffen, der frei von diesen Nachteilen ist und insbesondere für die Notbremseinrichtung keine mechanische Bremse benötigt. Diese Aufgabe löst ein Aufzugsantrieb mit den Merkmalen des Anspruches 1.The invention is based on the object of an elevator drive create that is free from these disadvantages and especially for the emergency braking device no mechanical brake required. This task is solved by an elevator drive with the Features of claim 1.

Wegen der Erzeugung des Erregerfeldes mittels Permanentmagneten kann ein solcher Gleichstrommotor auch bei Ausfall seiner Energieversorgung als Bremsgenerator genutzt erden, da hierzu nur im Notfall die Motorklemmen über einen mehr oder weniger großen Bremswiderstand kurzgeschlossen zu werden brauchen, was beispielsweise mittels eines Schaltschützes möglich ist, das beim Ausfall des Netzes entregt wird und dabei den Bremsstromkreis schließt. Ein weiterer wesentlicher Vorteil des erfindungsgemaßen Aufzugsantriebs ist die durch die Permanenterregung erreichte Wirkungsgradverbesserung,die zu einer deutlichen Energieeinsparung führt. Weiterhin ist von Vorteil, daß die Geräuschentwicklung wesentlich geringer ist als beispielsweise bei einem Aufzugsantrieb mit Asynchronmotor und Transistorsteller.Because of the generation of the excitation field by means of permanent magnets such a DC motor as a brake generator even if its power supply fails used because the motor terminals are only used in an emergency via a more or less need to be short-circuited large braking resistor, for example by means of a contactor is possible, which is de-energized in the event of a network failure and thereby the braking circuit closes. Another major advantage of the invention Elevator drive is the efficiency improvement achieved by the permanent excitation, the leads to significant energy savings. Another advantage is that the Noise development is significantly lower than, for example, with an elevator drive with asynchronous motor and transistor controller.

Im folgenden ist die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels im einzelnen erläutert.The invention is illustrated below with reference to one in the drawing Embodiment explained in detail.

Die einzige Figur zeigt ein Blockschaltbild des AusfUhrungsbeispiels.The single figure shows a block diagram of the exemplary embodiment.

Der Auf zugsantrieb weist als Antriebsmotor einen mittels PermanentmagneteS 1 erregten, als Ganzes mit 2 bezeichneten Gleichstrommotov, der von einem steuerbaren Gleichrichter 3 gespeist wird. Die Ausgangsspannung des Gleichrichters 3, die an den Notorklemmen anliegt, wird mittels eines Reglers 4 so eingestellt, daß der Motor das gewünschte Drehmoment und die erforderliche Drehzahl erreicht oder beibehält.The elevator drive has a permanent magnetS drive motor 1 excited DC motov designated as a whole with 2, that of a controllable Rectifier 3 is fed. The output voltage of the rectifier 3, which is at the notor terminals is applied, is set by means of a controller 4 so that the motor reaches or maintains the desired torque and speed.

Um bei einem Ausfall des Gleichrichters 3 oder des Netzes 5, an welches der Gleichrichter angeschlossen ist, eine elektrische Bremsung ausführen zu können, ist an die Klemmen des Gleichstrommotors 2 ein Bremsstrompfad angeschlossen, in dem ein Bremswiderstand 6 und ein mit ihm in Reihe geschalteter Ruhekontakt 7 eines Schaltschützes 8 liegt. Letzteres ist an einen Gleichrichter 9 angeschlossen, der parallel zum Gleichrichter 3 ständig am Netz 5 liegt. Solange das Netz Spannung führt, ist deshalb das Schaltschütz 8 erregt, was zur Folge hat, daß der Ruhekontakt geöffnet ist. Der Bremsstromkreis ist also> solange das Netz Spannung führt, vom Schaltschütz 8 unterbrochen. Nur wenn die Netzspannung ausfällt, schließt der SchaltschUtz 8 automatisch den Bremsstrompfad, was eine elektrische Abbremsung des Gleichstrommotors 2 und damit auch des Aufzuges zur Folge hat, dem der Gleichstrommotor zugeordnet ist.To in the event of a failure of the rectifier 3 or the network 5, to which the rectifier is connected to be able to perform electrical braking, a braking current path is connected to the terminals of the DC motor 2, in to the a braking resistor 6 and one connected in series with it Break contact 7 of a contactor 8 is located. The latter is to a rectifier 9 connected, which is constantly connected to the network 5 parallel to the rectifier 3. So long the mains carries voltage, the contactor 8 is therefore energized, which has the consequence that the normally closed contact is open. The braking circuit is> as long as the network Leads to voltage, interrupted by contactor 8. Only if the mains voltage fails the contactor 8 automatically closes the braking current path, which is an electrical Braking of the DC motor 2 and thus also of the elevator has the consequence the DC motor is assigned.

Um zu vermeiden, daß das Schaltschütz, beispielsweise infolge einer Stçrung, den Bremsstrompfad schließen kann, solange der Gleichrichter 3 den Gleichstrommotor mit Energie versorgt, weist das Schaltschütz 8 zusätzlich zu dem Ruhekontakt 7 zwei Arbeitskontakte 10 auf, die in der Speiseleitung vom Gleichrichter 3 zum Gleichstrommotor 2 liegen und diese unterbrechen, wenn das Schaltschütz abfällt.In order to avoid that the contactor, for example as a result of a Fault that can close the braking current path as long as the rectifier 3 is the DC motor supplied with energy, the contactor 8 in addition to the normally closed contact 7 has two Working contacts 10, which are in the feed line from the rectifier 3 to the DC motor 2 and interrupt it when the contactor drops out.

Selbstverständlich sind zur Steuerung des Bremsstromkreises auch andere Schaltelemente und Schaltungen geeignet, welche in der Lage sind, bei einem Netzausfall den Bremsstromkreis zu schließen.Of course, others are also used to control the braking circuit Switching elements and circuits suitable, which are capable in the event of a power failure to close the braking circuit.

Wegen der Permanenterregung entstehen im Erregerteil des Motors kine Stromverluste, weshalb sich ein Wirkungsgrad erzielen läßt, der deutlich über dem Wirkungsgrad von elektrisch erregten Gleichstrommotoren liegt.Because of the permanent excitation, there are no in the excitation part of the motor Current losses, which is why an efficiency can be achieved that is well above the Efficiency of electrically excited DC motors is.

-4/Ansprüche- -4 / Claims-

Claims (1)

Patentanspruch Aufzugsantrieb mit einem Gleichstrommotor und einer Notbremseinrichtung, dadurch gekennzeichnet, daß der Gleichstrommotor (3) als permanent erregter Motor ausgebildet ist und die Notbremseinrichtung (6,8) einen beim Ausfall der Energiever- sorgung des Motors dessen Klemmen automatisch überbrückenden Bremsstrompfad (6,7) hat. Claim elevator drive with a DC motor and a Emergency braking device, characterized in that the direct current motor (3) is permanent energized motor is formed and the emergency braking device (6,8) one in the event of failure the energy supply of the motor whose terminals automatically bridging braking current path (6.7) has.
DE19803001399 1980-01-16 1980-01-16 Drive system for hoist or lift - has emergency braking device shorting together terminals of DC motor when supply fails Withdrawn DE3001399A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803001399 DE3001399A1 (en) 1980-01-16 1980-01-16 Drive system for hoist or lift - has emergency braking device shorting together terminals of DC motor when supply fails

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803001399 DE3001399A1 (en) 1980-01-16 1980-01-16 Drive system for hoist or lift - has emergency braking device shorting together terminals of DC motor when supply fails

Publications (1)

Publication Number Publication Date
DE3001399A1 true DE3001399A1 (en) 1981-07-23

Family

ID=6092183

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803001399 Withdrawn DE3001399A1 (en) 1980-01-16 1980-01-16 Drive system for hoist or lift - has emergency braking device shorting together terminals of DC motor when supply fails

Country Status (1)

Country Link
DE (1) DE3001399A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998006595A2 (en) * 1996-08-13 1998-02-19 Western Deep Levels Limited Emergency braking system for an electric locomotive

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998006595A2 (en) * 1996-08-13 1998-02-19 Western Deep Levels Limited Emergency braking system for an electric locomotive
WO1998006595A3 (en) * 1996-08-13 1998-03-19 Western Deep Levels Emergency braking system for an electric locomotive

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