DE680082C - Device for limit switch-off with adjusting motors supplied with alternating current, the current of which is reduced in the end position - Google Patents

Device for limit switch-off with adjusting motors supplied with alternating current, the current of which is reduced in the end position

Info

Publication number
DE680082C
DE680082C DES132375D DES0132375D DE680082C DE 680082 C DE680082 C DE 680082C DE S132375 D DES132375 D DE S132375D DE S0132375 D DES0132375 D DE S0132375D DE 680082 C DE680082 C DE 680082C
Authority
DE
Germany
Prior art keywords
end position
current
reduced
limit switch
alternating current
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
DES132375D
Other languages
German (de)
Inventor
Dr Erich Friedlaender
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens 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 Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Priority to DES132375D priority Critical patent/DE680082C/en
Application granted granted Critical
Publication of DE680082C publication Critical patent/DE680082C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit

Description

Einrichtung zur Endabschaltung mit Wechselstrom gespeister Verstellmotoren, deren Strom in der Endstellung vermindert wird Bei Verstellmotoren, die mit Wechselstrom gespeist werden und die beispielsweise zur Regelung von Transformatoren oder von Drehreglern oder Widerstandsreglern usw. dienen, benutzt man die Endstellung des Verstellmotors dazu, um den Motor abzuschalten. Diese durch den Motor selbst herbeigeführte Abschaltung ist häufig die Ursache von Betriebsstörungen.Device for limit switch-off with adjusting motors supplied with alternating current, whose current is reduced in the end position are fed and used, for example, to control transformers or from Rotary controls or resistance controls, etc. are used, the end position of the Adjusting motor to switch off the motor. This brought about by the engine itself Shutdown is often the cause of malfunctions.

Die Erfindung betrifft eine Anordnung an derartigen Verstellmotoren, durch die ebenfalls eine Verminderung des Motorstromes in seiner Endstellung auf einen vernachlässigbaren Wert erreicht wird, die aber nicht den Nachteil der bekannten Anordnungen aufweist, bei denen in der Endstellung ein Schalter zur Abschaltung des Motorstromes benutzt wird. Erfindungsgemäß sind in den Motorstromkreis Drosselspulen eingeschaltet, an denen der Verstellmotor bei Erreichung der Endstellung durch Verminderung des magnetischen Widerstandes eine Verstärkung des Kraftflusses herbeiführt. Die Spule drosselt daher in der Endstellung des Motors seinen Strom auf einen geringfügigen Wert herab, der dann, wenn erforderlich, störungsfrei durch Schalter unterbrochen werden kann.The invention relates to an arrangement on such variable displacement motors, which also reduces the motor current in its end position a negligible value is reached, but this does not have the disadvantage of the known Has arrangements in which a switch for disconnection in the end position of the motor current is used. According to the invention, choke coils are in the motor circuit switched on, at which the adjusting motor when reaching the end position by reducing the magnetic resistance brings about an increase in the flow of force. the The coil therefore throttles its current to a slight level in the end position of the motor Value, which, if necessary, is interrupted without interference by a switch can be.

In der Zeichnung ist die Erfindung an Hand eines Beispiels näher erläutert. i ist der als Asynchronmotor ausgebildete Verstellmotor, der über ein Zahnradvorgelege 2 eine Schaltwalze 3 zu verstellen hat. Der Motor wird von einem Einphasennetz 4 über die Zuleitungen 5, 6 und 7 gespeist, und zwar derart, daß er entweder über die Zuleitungen 5 und 7 oder über die Zuleitungen 5 und 6 Strom be-,kommt und dabei in dem einen oder anderen Sinne umläuft. Mit Hilfe des Relais 8 bzw. mit Hilfe des Schalthebels g an diesem Relais kann die eine oder die andere Speisung des Motors herbeigeführt werden. In die Zuleitungen 6 und 7 sind nun noch die Drosselspulen io und ii eingeschaltet, die dabei räumlich die dargestellte Lage einnehmen. Die Drosselspulen haben Eisenkerne, für deren magnetischen Schluß der Eisenteil 12 dient. Dieser. ist z. B. mit der Schaltwalze 3 gekuppelt. In den Endstellungen der Schaltwalze liegt das Stück 12, entweder an dem Eisenkern der_prosselspule io eng an oder an dem der Drosselspule i i. Dadurch ist die Induktivität der Drosselspule derart vergrößert, daß sie den Motorstrom auf einen geringfügigen Betrag abdrosselt, der dann mit Hilfe des Relais 8 ohne Schwierigkeiten vollends unterbrochen werden kann. Zu den '\ÄTicklungen der Drosselspulen io und i i können noch die Kondensatoren 13 und 14 parallel geschaltet sein. Diese Kondensatoren sind so bemessen, daß bei der Betriebsfrequenz die Blindstromaufnahme der geschlossenen Drossel, an der also der Eisenkern i2 anliegt, gerade durch den Kondensator ausgeglichen wird. Kondensator und Drossel stellen also einen auf die Betriebsfrequenz abgestimmten Sperrkreis dar. Man erzielt dadurch eine weitere Verminderung des durch den Verstellmotor fließenden Stromes, und dadurch werden auch die Dauerverluste bei etwaigem Daueranschlag wirksam vermindert.In the drawing, the invention is explained in more detail using an example. i is the asynchronous motor designed as a variable displacement motor, which is driven by a gear train 2 has to adjust a shift drum 3. The motor is powered by a single-phase network 4 fed via the leads 5, 6 and 7, in such a way that he either over the supply lines 5 and 7 or via the supply lines 5 and 6 current gets, and thereby circulates in one sense or another. With the help of the relay 8 or with the help of the Shift lever g on this relay can supply one or the other of the motor be brought about. The choke coils are now in the supply lines 6 and 7 io and ii switched on, which spatially occupy the position shown. the Choke coils have iron cores, for the magnetic connection of which the iron part 12 is used. This. is z. B. coupled to the shift drum 3. In the end positions of the shift drum is the piece 12, either close to the iron core of the_prosselspule io or on that of the inductor i i. This increases the inductance of the choke coil in such a way that that it throttles the motor current to a small amount, which then with the help of the relay 8 can be completely interrupted without difficulty. To the '\ ÄTicklungen of the inductors io and i i can still connect the capacitors 13 and 14 in parallel be. These capacitors are dimensioned so that the reactive current consumption at the operating frequency of the closed throttle, which is why the iron core i2 is present, straight through the Capacitor is balanced. So capacitor and choke put you on the This represents a further reduction in the frequency of operation of the current flowing through the adjusting motor, and thereby also the permanent losses effectively reduced in the event of a permanent stop.

Claims (3)

PA'rGNTANspRÜcfIR: i. Einrichtung zur Endabschaltung mit Wechselstrom gespeister Verstellmotoren, deren Strom in der Endstellung vermindert wird, dadurch gekennzeichnet, daß der Kraftfluß in den Motorstromkreis eingeschalteter Drosselspulen bei Erreichen der Endstellung durch Verminderung des magnetischenWiderstandes verstärktwird. PA'rGNTANspRÜcfIR: i. Device for limit switch-off with alternating current powered adjustment motors, the current of which is reduced in the end position, thereby characterized in that the power flow in the motor circuit of switched-on inductors is increased when the end position is reached by reducing the magnetic resistance. 2. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß ein vom Verstellmotor angetriebener Teil des Eisenkerns in der Endstellung in eine die magnetischen Kraftlinien der Drossel schließende Stellung gebracht wird. 2. Device according to claim i, characterized in that one of the adjusting motor driven part of the iron core in the end position into one of the magnetic lines of force the throttle is brought to the closing position. 3. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß zu den Drosselspulen Kondensatoren parallel geschaltet sind, deren Kapazität so bemessen ist, daß sie bei geschlossener Drosselspule einen Sperrizreis für die Betriebsfrequenz bilden.3. Device according to claim i, characterized in that capacitors are connected in parallel to the inductors are whose capacity is dimensioned so that they have a closed choke coil Form blocking circle for the operating frequency.
DES132375D 1938-05-29 1938-05-29 Device for limit switch-off with adjusting motors supplied with alternating current, the current of which is reduced in the end position Expired DE680082C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES132375D DE680082C (en) 1938-05-29 1938-05-29 Device for limit switch-off with adjusting motors supplied with alternating current, the current of which is reduced in the end position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES132375D DE680082C (en) 1938-05-29 1938-05-29 Device for limit switch-off with adjusting motors supplied with alternating current, the current of which is reduced in the end position

Publications (1)

Publication Number Publication Date
DE680082C true DE680082C (en) 1939-08-22

Family

ID=7539057

Family Applications (1)

Application Number Title Priority Date Filing Date
DES132375D Expired DE680082C (en) 1938-05-29 1938-05-29 Device for limit switch-off with adjusting motors supplied with alternating current, the current of which is reduced in the end position

Country Status (1)

Country Link
DE (1) DE680082C (en)

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