DE671377C - Synchronization device for precision control hoists - Google Patents

Synchronization device for precision control hoists

Info

Publication number
DE671377C
DE671377C DES122663D DES0122663D DE671377C DE 671377 C DE671377 C DE 671377C DE S122663 D DES122663 D DE S122663D DE S0122663 D DES0122663 D DE S0122663D DE 671377 C DE671377 C DE 671377C
Authority
DE
Germany
Prior art keywords
precision control
synchronization device
hoists
generators
control hoists
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.)
Expired
Application number
DES122663D
Other languages
German (de)
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.)
VEM Sachsenwerk GmbH
Original Assignee
Sachsenwerk Licht und Kraft AG
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 Sachsenwerk Licht und Kraft AG filed Critical Sachsenwerk Licht und Kraft AG
Priority to DES122663D priority Critical patent/DE671377C/en
Application granted granted Critical
Publication of DE671377C publication Critical patent/DE671377C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
    • B66C2700/081—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists with ac motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Multiple Motors (AREA)

Description

Gleichlaufeinrichtung .für Feinregelhubwerke Zum Gleichlauf vom Hubwerken bediente man sich der elektrischen Kupplung der Läufer der Hauptmotoren. Auf diese Weise erzielte man zwar bei schweren Lasten, also niedren Drehzahlen, :ein kräftiges, synchronisierendes Moment, dagegen bei hohen, Drehzahlen, insbesondere in der Nähe -des Synchronismus, war infolge der geringen Ausgleirhströme der Gleichlauf nicht mehr gesichert.Synchronization device for precision control hoists The electrical coupling of the rotors of the main motors was used to synchronize the hoists. In this way, with heavy loads, i.e. low speeds, you achieved: a powerful, synchronizing torque, on the other hand, at high speeds, especially close to synchronism, synchronism was no longer ensured due to the low leveling currents.

Die Erfindung beruht nur auf der Erkenntnis, d@aß die bei elektrischen Hubwerken vielfach üblichen Bremsgeneratoren zur Herbeiführung des Gleichlaufs mitbenutzt werden können. Erfindungsgemäß wird :daher bei Feinregelhubwerken, bei denen jeder Hauptmotor mit ;ganz oder teilweise fremderregten Bremsgeneratoren gekuppelt ist, der Gleichlauf über den ganzen Drehzahlbereich dadurch erzielt, daß die mit Schleifringen versehenen Läufer der fremderregten Bremsgeneratoren elektrisch gekuppelt sind. Bei den hohen Drehzahlen, bei deinen also das Ausgleichsmoment der Induktionsmotoren sehr ,gering ist, wird durch die als Synchrongeneratoren wirkenden Gleichstrommaschinen das erforderliche synchronisierende Moment erzeugt. Es werden also besondere Ausgleichsinaschinen, die die Anlagekosten, verteuern und den Platzbedarf erhöhen, gespart.The invention is based only on the knowledge that the electric Hoists commonly used brake generators to bring about synchronization can be. According to the invention: therefore with precision control hoists in which each The main engine is coupled with fully or partially separately excited brake generators, synchronism over the entire speed range is achieved by using slip rings provided rotors of the separately excited brake generators are electrically coupled. At the high speeds, i.e. at yours, the compensation torque of the induction motors is very, low, is caused by the DC machines acting as synchronous generators generates the necessary synchronizing moment. So there are special compensating machines, which make the investment costs more expensive and increase the space requirement.

Die Abbildung zeigt :ein AusfÜhrungsbeispiel des Erfindungsgedankens: A1 und An sind die zum Antrieb dienenden Induktionsmotoren (Hauptmotoren; deren Läufer eIcktrisch miteinander verbunden sind und an den gemeinsamen Anlaßwiderstand W angeschlossen sind. Mit den Hauptmotoren sind die Bremsgeneratoren B1 und &., mechanisch gekuppelt, die über die Gleichrichter G1 und G, eine zusätzliche Erregung erhalten und ;auf die Bremswiderstände R1 bzw. R2 arbeiten. Über die an die Läuferwicklungen angeschlossenen Schleifringe S1 und S2 werden die Bremsgeneratoren miteinander elektrisch ;gekuppelt.The figure shows: an exemplary embodiment of the inventive concept: A1 and An are the induction motors used for driving (main motors; their Runners are eIcktrisch connected to each other and to the common starting resistor W are connected. The main motors are the brake generators B1 and &., mechanically coupled, via the rectifiers G1 and G, an additional excitation and; work on the braking resistors R1 and R2. About the to the rotor windings connected slip rings S1 and S2, the brake generators are electrically connected to each other ; coupled.

Claims (1)

PATLNTANSPRUCII: Gleichlaufeinrichtung für Feinregel.hubwerke, deren Hauptmotoren mit ganz oder teilweise fremd :erregten Bremsgeneratoren ;gekuppelt sind, dadurch gekennzeichnet, :daß sowohl die Läufer der Hauptmotoren (A1, A.) als auch die mit Schleifringen versehenen Läufer der Bremsgeneratoren (Bi, B2) elektrisch gekuppelt sind.PATLNTANSPRUCII: Synchronization device for precision control hoists, the main motors of which are coupled with fully or partially externally excited brake generators, characterized in that both the rotors of the main motors (A1, A.) and the rotors of the brake generators (Bi, B2) are electrically coupled.
DES122663D 1936-05-15 1936-05-15 Synchronization device for precision control hoists Expired DE671377C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES122663D DE671377C (en) 1936-05-15 1936-05-15 Synchronization device for precision control hoists

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES122663D DE671377C (en) 1936-05-15 1936-05-15 Synchronization device for precision control hoists

Publications (1)

Publication Number Publication Date
DE671377C true DE671377C (en) 1939-02-06

Family

ID=7535958

Family Applications (1)

Application Number Title Priority Date Filing Date
DES122663D Expired DE671377C (en) 1936-05-15 1936-05-15 Synchronization device for precision control hoists

Country Status (1)

Country Link
DE (1) DE671377C (en)

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