EP0061646B1 - Cut-off device for an electric bobbin starter axle drive such as a variable-speed three-phase a.c. motor - Google Patents

Cut-off device for an electric bobbin starter axle drive such as a variable-speed three-phase a.c. motor Download PDF

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Publication number
EP0061646B1
EP0061646B1 EP82102120A EP82102120A EP0061646B1 EP 0061646 B1 EP0061646 B1 EP 0061646B1 EP 82102120 A EP82102120 A EP 82102120A EP 82102120 A EP82102120 A EP 82102120A EP 0061646 B1 EP0061646 B1 EP 0061646B1
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EP
European Patent Office
Prior art keywords
cut
value
command
motor
drive
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
EP82102120A
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German (de)
French (fr)
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EP0061646A1 (en
Inventor
Dietrich Krampe
Tilo Heyl
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Siemens AG
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Siemens AG
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Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0061646A1 publication Critical patent/EP0061646A1/en
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Publication of EP0061646B1 publication Critical patent/EP0061646B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/42—Arrangements for rotating packages in which the package, core, or former is rotated by frictional contact of its periphery with a driving surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a switch-off device for an electric axle drive used to start up a winding spool, which can be detached after the run-up and after the start of the winding-up process by a drive roller drive which is synchronized in peripheral speed and which becomes effective as a result of the increasing winding diameter.
  • Circumferential drives with drive rollers are very often used to drive the winding spools in the chemical fiber industry, since this makes it relatively easy to maintain constant thread take-off speeds.
  • these circumferential drives are not always able to move the empty winding spool from standstill to nominal speed in a relatively short time. Additional axle drives are therefore used, which are switched off again after the drive roller drive takes effect.
  • the change in power of the start-up motor caused by the drive roller motor becoming effective can be used as a criterion for the switch-off command.
  • the problem arises here that the power (torque) at which the command would have to be given depends on numerous technological parameters, such as, for example, B. the number of threads to be wound up simultaneously, the thread thickness, the thread speed and the air gap between the bobbin and the drive roller is dependent.
  • the object of the present invention is to design the arrangement of the type mentioned at the outset such that the criterion for the switch-off command is automatically adapted to the different parameters.
  • This object is achieved according to the invention in that after the run-up and start of the winding process and before the drive roller drive takes effect, a measured value proportional to the torque of the axle drive can be stored and the switch-off command can be triggered when the measured instantaneous value for the moment after the drive roller drive takes effect has the stored value by a predetermined amount.
  • the value resulting after the run-up and the thread lying on the bobbin is stored as the switch-off setpoint. This value takes account of the current conditions.
  • the storage command is advantageously only issued shortly after the start of the winding process.
  • the conditions for the switch-off command are advantageously checked for presence only after a predetermined time.
  • the arrangement can be realized particularly simply by taking the actual current value after the thread is placed in a memory amplifier, the output signal of which is compared with the instantaneous value of the current in a comparator, which in turn triggers the switch-off command when the measured value matches the stored setpoint.
  • the coil is hereby at nominal speed - which, for. B. can correspond to a peripheral speed of 4000 meters per minute -, ramped up.
  • the z. B. is withdrawn from an extruder, not shown, placed on the winding spool 1.
  • the motor current J which is proportional to the torque of the motor 4 increases to the static value J a after short-term dynamic processes have subsided.
  • This measured value is fed to a memory amplifier 91 via a filter 92.
  • the application device 3 generates a signal which, via the contact 31 and a delay element 99 with the duration t v1, disconnects the memory amplifier 91 from the actual current value J at the time t a by opening the switch 911.
  • the current actual value present at this time which is proportional to the torque, is retained in the memory amplifier 91.
  • the drive 5 is also a synchronous motor, which is fed from the converter 7. If the gap s is filled at the time t 2 , there is circumferential contact between the winding spool and the drive roller. Since the peripheral speeds of the winding bobbin and the drive roller are well synchronized, the motor 4 is first relieved by the motor 5, so that the measured current J of the motor 4 decreases in accordance with FIG. With increasing winding diameter, the peripheral speed of the winding drive increases, so that the motor 5 from the motor 4 is dragged along; the current J of the motor 4 increases again.
  • this current again reaches the stored output value J a at time t 3 .
  • this value is exceeded by an experimentally determined adjustable amount AJ and the triggering command is thus formed.
  • this is done in that the output of the memory amplifier 91 and the instantaneous instantaneous value J of the motor 4 taken from the filter 92 via line 93 are connected to a comparator 94 which emits a signal if the two values match.
  • the adjustable value AJ can be taken into account by a corresponding design of the comparator 94 or the memory amplifier 91.
  • the output signal of the comparator 94 is linked to the output signal of a delay element 98, which is also triggered when the switch 31 closes and which fulfills a further AND condition on a logic element 95 after the time t v2 so that no switch-off commands which are too early and thus incorrect are triggered .
  • the signal caused by the closing of the switch 31 is applied to this link 95. If all logic conditions are met, the signaling relay 96 sends the switch-off command A to the converter 6 via line 97 and the motor 4 is mechanically separated from the winding coil 1 by the coupling 41.

Description

Die Erfindung bezieht sich auf eine Abschaltvorrichtung für einen zum Hochfahren einer Wickelspule dienenden elektrischen Achsantrieb, der nach dem Hochlauf und nach dem Beginn des Aufwickelvorganges durch einen infolge des zunehmenden Wickeldurchmessers wirksam werdenden, in der Umfangsgeschwindigkeit synchronisierten Treibwalzenantrieb ablösbar ist.The invention relates to a switch-off device for an electric axle drive used to start up a winding spool, which can be detached after the run-up and after the start of the winding-up process by a drive roller drive which is synchronized in peripheral speed and which becomes effective as a result of the increasing winding diameter.

Zum Antrieb der Wickelspulen in der Chemiefaserindustrie werden sehr häufig Umfangsantriebe mit Treibwalzen benutzt, da hierdurch relativ leicht konstante Fadenabzugsgeschwindigkeiten einhaltbar sind. Diese Umfangsantriebe sind aber nicht immer in der Lage, die leere Wickelspule in relativ kurzer Zeit vom Stillstand auf Nenndrehzahl hochzufahren. Man verwendet daher zusätzliche Achsantriebe, die nach dem Wirksamwerden des Treibwalzenantriebes wieder abgeschaltet werden. Die durch das Wirksamwerden des Treibwalzenmotors bedingte Leistungsänderung des Hochfahrmotors kann dabei als Kriterium für den Abschaltbefehl benutzt werden. Hierbei tritt jedoch das Problem auf, dass die Leistung (Moment), bei der der Befehl gegeben werden müsste, von zahlreichen technologischen Parametern, wie z. B. der Zahl der gleichzeitig aufzuwickelnden Fäden, der Fadenstärke, der Fadengeschwindigkeit und dem Luftspalt zwischen Spule und Treibwalze abhängig ist.Circumferential drives with drive rollers are very often used to drive the winding spools in the chemical fiber industry, since this makes it relatively easy to maintain constant thread take-off speeds. However, these circumferential drives are not always able to move the empty winding spool from standstill to nominal speed in a relatively short time. Additional axle drives are therefore used, which are switched off again after the drive roller drive takes effect. The change in power of the start-up motor caused by the drive roller motor becoming effective can be used as a criterion for the switch-off command. However, the problem arises here that the power (torque) at which the command would have to be given depends on numerous technological parameters, such as, for example, B. the number of threads to be wound up simultaneously, the thread thickness, the thread speed and the air gap between the bobbin and the drive roller is dependent.

Die Aufgabe der vorliegenden Erfindung besteht darin, die Anordnung der eingangs genannten Art so auszubilden, dass das Kriterium für den Abschaltbefehl selbsttätig an die unterschiedlichen Parameter angepasst wird.The object of the present invention is to design the arrangement of the type mentioned at the outset such that the criterion for the switch-off command is automatically adapted to the different parameters.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass nach dem Hochlauf und Beginn des Wickelvorganges und vor dem Wirksamwerden des Treibwalzenantriebes ein dem Drehmoment des Achsantriebes proportionaler Messwert speicherbar ist und der Abschaltbefehl auslösbar ist, wenn der gemessene Augenblickswert für das Moment nach dem Wirksamwerden des Treibwalzenantriebes den Speicherwert um einen vorgegebenen Betrag überschreitet. Mit anderen Worten, es wird also der sich nach dem Hochlauf und dem Aufliegen des Fadens auf die Spule ergebende Wert als Abschaltsollwert gespeichert. Dieser Wert trägt den jeweils vorliegenden Bedingungen Rechnung.This object is achieved according to the invention in that after the run-up and start of the winding process and before the drive roller drive takes effect, a measured value proportional to the torque of the axle drive can be stored and the switch-off command can be triggered when the measured instantaneous value for the moment after the drive roller drive takes effect has the stored value by a predetermined amount. In other words, the value resulting after the run-up and the thread lying on the bobbin is stored as the switch-off setpoint. This value takes account of the current conditions.

Im Regelfall werden als Achs- und Treibwalzenantrieb von Spannungszwischenkreis-Umrichtern gespeiste Synchronmotoren verwendet. Als Ersatzgrösse für das Moment bietet sich dann der Wirkstrom im Gleichstromzwischenkreis des Wechselrichters oder aus Billigkeitsgründen der Scheinstrom am Ausgang des Umrichters an.As a rule, synchronous motors powered by DC link converters are used as the axis and drive roller drives. The active current in the DC link of the inverter or, for reasons of equity, the apparent current at the output of the converter is then a suitable substitute for the moment.

Um die beim Auflegen der Fäden auftretenden dynamischen Momentänderungen von der Bildung des Abschaltsollwertes auszuschliessen, wird vorteilhafterweise der Speicherbefehl erst kurz nach dem Beginn des Wickelvorganges abgegeben.In order to exclude the dynamic torque changes that occur when the threads are laid on from the formation of the switch-off setpoint, the storage command is advantageously only issued shortly after the start of the winding process.

Damit auch z.B. durch relativ unterschiedliche Umfangsgeschwindigkeiten zwischen Treibwalze und Wickel keine vorzeitigen Abschaltbefehle ausgelöst werden, werden vorteilhafterweise die Bedingungen für den Abschaltbefehl erst nach einer vorgegebenen Zeit auf Vorliegen überprüft.So that e.g. Due to the relatively different peripheral speeds between the drive roller and the winding, no premature switch-off commands are triggered, the conditions for the switch-off command are advantageously checked for presence only after a predetermined time.

Schaltungstechnisch lässt sich die Anordnung besonders einfach dadurch realisieren, dass der nach dem Auflegen des Fadens vorliegende Stromistwert in einen Speicherverstärker übernommen wird, dessen Ausgangssignal mit dem jeweiligen Augenblickswert des Stromes in einem Komparator verglichen wird, der seinerseits dann den Abschaltbefehl auslöst, wenn der gemessene Wert mit dem gespeicherten Sollwert übereinstimmt.In terms of circuitry, the arrangement can be realized particularly simply by taking the actual current value after the thread is placed in a memory amplifier, the output signal of which is compared with the instantaneous value of the current in a comparator, which in turn triggers the switch-off command when the measured value matches the stored setpoint.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles sei die Erfindung näher erläutert; es zeigen:

  • Figur 1 ein schematisches Schaltbild der Anordnung und
  • Figur 2 den zeitlichen Verlauf des Stromes des Achswickelmotors.
The invention will be explained in more detail with reference to an embodiment shown in the drawing; show it:
  • Figure 1 is a schematic diagram of the arrangement and
  • Figure 2 shows the time course of the current of the axle winding motor.

Ein über einen Umrichter 6 mit Gleichspannungszwischenkreis gespeister Synchronmotor 4 treibt über eine schaltbare Kupplung 41 eine Wikkelspule 1 an. Durch Hochfahren der Frequenz und Spannung des Umrichters 6 wird hiermit die Spule auf Nenngeschwindigkeit - was z. B. einer Umfangsgeschwindigkeit von 4000 Metern pro Minute entsprechen kann -, hochgefahren. Hat der Motor 4 die gewünschte Drehzahl erreicht, so wird zum Zeitpunkt t1 durch eine Fadenauflegevorrichtung 3 der aufzuwickelnde Faden 2, der z. B. aus einem nichtgezeigten Extruder abgezogen wird, auf die Wickelspule 1 aufgelegt. Hierdurch steigt der dem Moment des Motors 4 proportionale Motorstrom J - nach Abklingen kurzfristiger dynamischer Vorgänge - auf den statischen Wert Ja an. Dieser Messwert wird über einen Filter 92 einem Speicherverstärker 91 zugeführt. Gleichzeitig wird durch die Auflegevorrichtung 3 ein Signal erzeugt, das über den Kontakt 31 und ein Verzögerungsglied 99 mit der Zeitdauer tv1 den Speicherverstärker 91 im Zeitpunkt ta durch Öffnen des Schalters 911 vom Stromistwert J abtrennt. Hierdurch bleibt der in diesem Zeitpunkt vorliegende Stromistwert, der dem Moment proportional ist, im Speicherverstärker 91 erhalten.A synchronous motor 4, which is supplied with a DC voltage intermediate circuit via a converter 6, drives a winding coil 1 via a switchable clutch 41. By ramping up the frequency and voltage of the converter 6, the coil is hereby at nominal speed - which, for. B. can correspond to a peripheral speed of 4000 meters per minute -, ramped up. At the time 4 has reached the desired speed of the motor, it is t 1 by a Fadenauflegevorrichtung 3 of the thread to be spooled 2, the z. B. is withdrawn from an extruder, not shown, placed on the winding spool 1. As a result, the motor current J, which is proportional to the torque of the motor 4, increases to the static value J a after short-term dynamic processes have subsided. This measured value is fed to a memory amplifier 91 via a filter 92. At the same time, the application device 3 generates a signal which, via the contact 31 and a delay element 99 with the duration t v1, disconnects the memory amplifier 91 from the actual current value J at the time t a by opening the switch 911. As a result, the current actual value present at this time, which is proportional to the torque, is retained in the memory amplifier 91.

Mit zunehmendem Wickeldurchmesser wird der Spalt s zwischen Umfang der Wickelspule bei Beginn des Wickelvorganges und der Treibwalze 8 des Treibwalzenantriebes 5 nach und nach ausgefüllt. Der Antrieb 5 ist ebenfalls ein Synchronmotor, der aus dem Umrichter 7 gespeist wird. Wenn der Spalt s zum Zeitpunkt t2 ausgefüllt ist, kommt es zur Umfangsberührung zwischen Wickelspule und Treibwalze. Da die Umfangsgeschwindigkeiten von Wickelspule und Treibwalze gut synchronisiert sind, wird der Motor 4 zunächst durch den Motor 5 entlastet, so dass sich der gemessene Strom J des Motors 4 entsprechend Figur 2 verringert. Mit zunehmendem Wickeldurchmesser nimmt die Umfangsgeschwindigkeit des Wickelantriebes zu, so dass der Motor 5 vom Motor 4 mitgeschleppt wird; der Strom J des Motors 4 steigt erneut an. Wie in der Skizze angedeutet, erreicht dabei dieser Strom zum Zeitpunkt t3 wieder den gespeicherten Ausgangswert Ja. Dieser Wert wird zum Zeitpunkt t4 um einen experimentell ermittelten einstellbaren Betrag A J überschritten und damit der Auslösebefehl gebildet. Dies geschieht schaltungsmässig dadurch, dass der Ausgang des Speicherverstärkers 91 und der über Leitung 93 aus dem Filter 92 entnommene aktuelle Augenblickswert J des Motors 4 an einem Komparator 94 liegen, der beim Übereinstimmen beider Werte ein Signal abgibt. Der einstellbare Wert A J kann dabei durch entsprechende Ausgestaltung des Komparators 94 oder des Speicherverstärkers 91 berücksichtigt sein.As the winding diameter increases, the gap s between the circumference of the winding spool at the start of the winding process and the drive roller 8 of the drive roller drive 5 is gradually filled. The drive 5 is also a synchronous motor, which is fed from the converter 7. If the gap s is filled at the time t 2 , there is circumferential contact between the winding spool and the drive roller. Since the peripheral speeds of the winding bobbin and the drive roller are well synchronized, the motor 4 is first relieved by the motor 5, so that the measured current J of the motor 4 decreases in accordance with FIG. With increasing winding diameter, the peripheral speed of the winding drive increases, so that the motor 5 from the motor 4 is dragged along; the current J of the motor 4 increases again. As indicated in the sketch, this current again reaches the stored output value J a at time t 3 . At time t 4, this value is exceeded by an experimentally determined adjustable amount AJ and the triggering command is thus formed. In terms of circuitry, this is done in that the output of the memory amplifier 91 and the instantaneous instantaneous value J of the motor 4 taken from the filter 92 via line 93 are connected to a comparator 94 which emits a signal if the two values match. The adjustable value AJ can be taken into account by a corresponding design of the comparator 94 or the memory amplifier 91.

Damit keine zu frühen und damit fehlerhaften Abschaltbefehle ausgelöst werden, wird das Ausgangssignal des Komparators 94 mit dem Ausgangssignal eines Verzögerungsgliedes 98 verknüpft, das ebenfalls beim Schliessen des Schalters 31 angestossen wird und nach der Zeit tv2 eine weitere UND-Bedingung an einem Verknüpfungsglied 95 erfüllt. Zusätzlich ist an diesem Verknüpfungsglied 95 das durch das Schliessen des Schalters 31 bewirkte Signal angelegt. Sind alle Verknüpfungsbedingungen erfüllt, so wird vom Melderelais 96 über Leitung 97 der Abschaltbefehl A an den Umrichter 6 gegeben und der Motor 4 durch die Kupplung 41 von der Wickelspule 1 mechanisch getrennt.The output signal of the comparator 94 is linked to the output signal of a delay element 98, which is also triggered when the switch 31 closes and which fulfills a further AND condition on a logic element 95 after the time t v2 so that no switch-off commands which are too early and thus incorrect are triggered . In addition, the signal caused by the closing of the switch 31 is applied to this link 95. If all logic conditions are met, the signaling relay 96 sends the switch-off command A to the converter 6 via line 97 and the motor 4 is mechanically separated from the winding coil 1 by the coupling 41.

Claims (5)

1. A cut-off device for an electric axle drive which serves to start a bobbin and is relieved after run-up and the beginning of a winding process by a driving roller drive which becomes effective as a result of the increasing coil diameter and is synchronized at the peripheral speed, characterised in that after the run-up and the beginning of the winding process and before the driving roller drive (5) becomes effective a measured value (Ja), proportional to the torque of the axle drive (4) is stored and the cut-off command (A) triggered when the measured instantaneous value (J) for the momentum exceeds the storage value (Ja) by a predetermined amount (A J) after the driving roller drive (5) has become effective.
2. A cut-off device as claimed in claim 1, wherein synchronous motors fed by inverters are provided as axle and driving roller drive, characterised in that the current (J) measured in the intermediate d.c. voltage circuit or at the output of the inverter (6), serves as an equivalent magnitude for the momentum.
3. A cut-off device as claimed in claim 1, characterised in that the storage command is triggered at an adjustable period of time (tvi) after the beginning of the winding process.
4. A cut-off device as claimed in claim 1 or 3, characterised in that the requirements for the cut-off command (A) only become effective after a predetermined time (tv2)-
5. A cut-off device as claimed in claim 2, characterised in that the measured value (Ja) is transferred into a storage amplifier (91) whose starting value is compared with the measured instantaneous value of the current (J) in a comparator (94) which supplies the cut-off command.
EP82102120A 1981-03-26 1982-03-16 Cut-off device for an electric bobbin starter axle drive such as a variable-speed three-phase a.c. motor Expired EP0061646B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3111990A DE3111990C2 (en) 1981-03-26 1981-03-26 Disconnection device for an electric axle drive that is used to run up a winding reel as a variable-speed three-phase motor
DE3111990 1981-03-26

Publications (2)

Publication Number Publication Date
EP0061646A1 EP0061646A1 (en) 1982-10-06
EP0061646B1 true EP0061646B1 (en) 1985-07-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102120A Expired EP0061646B1 (en) 1981-03-26 1982-03-16 Cut-off device for an electric bobbin starter axle drive such as a variable-speed three-phase a.c. motor

Country Status (3)

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US (1) US4404501A (en)
EP (1) EP0061646B1 (en)
DE (1) DE3111990C2 (en)

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
US4548366A (en) * 1982-05-17 1985-10-22 Rieter Machine Works, Ltd. Chuck drive system
DE3610838C2 (en) * 1986-04-01 1994-11-03 Rieter Ag Maschf Device for the production of textile fiber dressings
DE4132208C1 (en) * 1991-09-27 1993-02-04 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
EP0580548A1 (en) * 1992-07-23 1994-01-26 Maschinenfabrik Rieter Ag Method and apparatus for winding yarn
DE19539656A1 (en) * 1995-10-25 1997-04-30 Klein Schanzlin & Becker Ag Method for starting variable-speed electric drives
DE102004004759B4 (en) * 2004-01-30 2006-03-09 Koenig & Bauer Ag Drive for a reel changer
CN104020418B (en) * 2014-06-09 2016-09-07 新疆金风科技股份有限公司 The simulative running system of direct-driving synchronous wind turbine generator and dry run method

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Publication number Priority date Publication date Assignee Title
GB1110766A (en) * 1964-07-20 1968-04-24 Mackie & Sons Ltd J Improvements in and relating to yarn winding apparatus
JPS4824983B1 (en) * 1968-01-27 1973-07-25
JPS5142214B2 (en) * 1972-12-16 1976-11-15
BR7401452D0 (en) * 1973-03-01 1974-11-05 Barmag Barmer Maschf SYNTHETIC FIBER EMBINING MACHINE
DE2363768C2 (en) * 1973-12-21 1984-08-23 Akzo Gmbh, 5600 Wuppertal Winding device on spinning machines
DE2458996A1 (en) * 1974-12-13 1976-06-16 Karlsruhe Augsburg Iweka REGULATORY ARRANGEMENT, ESPECIALLY ON SPOOL SPINING MACHINES
US4025830A (en) * 1975-02-03 1977-05-24 Computer Peripherals, Inc. Motor control and web material drive system
CH605272A5 (en) * 1975-08-08 1978-09-29 Barmag Barmer Maschf
US4125881A (en) * 1977-05-19 1978-11-14 International Business Machines Corporation Tape motion control for reel-to-reel drive
US4146824A (en) * 1977-09-26 1979-03-27 Bell & Howell Company Low speed servo control

Also Published As

Publication number Publication date
US4404501A (en) 1983-09-13
DE3111990C2 (en) 1984-03-22
DE3111990A1 (en) 1982-10-14
EP0061646A1 (en) 1982-10-06

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