EP0408703A1 - Machine textile, notamment metier circulaire. - Google Patents

Machine textile, notamment metier circulaire.

Info

Publication number
EP0408703A1
EP0408703A1 EP90901572A EP90901572A EP0408703A1 EP 0408703 A1 EP0408703 A1 EP 0408703A1 EP 90901572 A EP90901572 A EP 90901572A EP 90901572 A EP90901572 A EP 90901572A EP 0408703 A1 EP0408703 A1 EP 0408703A1
Authority
EP
European Patent Office
Prior art keywords
textile machine
machine according
ring
drafting
assigned
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.)
Granted
Application number
EP90901572A
Other languages
German (de)
English (en)
Other versions
EP0408703B1 (fr
Inventor
Urs Meyer
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter 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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0408703A1 publication Critical patent/EP0408703A1/fr
Application granted granted Critical
Publication of EP0408703B1 publication Critical patent/EP0408703B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/32—Driving or stopping arrangements for complete machines

Definitions

  • the invention relates to a textile machine, in particular a ring spinning machine, with a plurality of drive systems for driving loads which have at least partially different effective persistence, such as in particular spindles, drafting devices, ring banks or the like.
  • the working elements to be driven run as uniformly and precisely as possible and, in particular, also that the speed and / or speed ratios of these working elements are defined.
  • the essential working elements in this context are, in particular, the spindles, the drafting units and the ring carriers or ring banks.
  • the ratio of the spindle speed to the delivery speed is decisive for the twist and the strength of the yarn.
  • the speeds of the individual cylinders of the drafting system must also be in a defined relationship to one another.
  • the movement speed of the ring rail and the ratio of this speed to the conveying speed are important for the formation of packages on the tubes.
  • the invention has for its object to provide a textile machine of the type mentioned, in which, with the least possible effort and in particular without special complex emergency units such as buffer accumulators or the like, practically automatically at least the energy required for a defined spinning operation in the event of a power failure ⁇ table and is provided without delay.
  • the drive system assigned to the load with the greatest effective persistence comprises at least one asynchronous motor which is speed-controlled in normal operation via a supply frequency and, in the event of a power failure, to supply at least one other drive system as a capacitor-excited generator.
  • the asynchronous motor preferably has capacitors connected in parallel to the stator winding.
  • the reactive power is thus generated directly on the motor / generator without the need for a battery or the like.
  • the converter concerned has a lower apparent power.
  • the braking function is simpler and more reliable. Virtually no or only a much smaller backup battery is required. Finally, there is a higher degree of efficiency.
  • the asynchronous motor which operates as a capacitor-excited generator in the event of a power failure, is advantageously assigned to the drive system for the spindles in the case of a ring spinning machine and is preferably used to provide emergency power to the drafting system and the drive system assigned to the ring bank.
  • Ring bench and drafting system can be controlled separately within a common drive system or can also be assigned to different drive systems.
  • the automatically generated emergency voltage supply also allows a controlled movement sequence of the ring bank to be maintained for a sufficiently long period of time.
  • the rotor of the asynchronous motor is driven over-synchronously due to the persistence of the spindles, ie the endeavor to keep rotating, in the sense of the normally existing rotating field, which is synonymous with a negative slip.
  • Such an oversynchronous drive immediately results in a transition to the generator state in the three-phase induction motor used.
  • no reactive current for exciting the induction generator has to be supplied by the network.
  • no synchronous generators to be connected to a special voltage supply are required to generate inductive current. Since a corresponding voltage was inevitably applied to the asynchronous motor before each power failure, the initial conditions for a possible generator operating state are also automatically created.
  • the capacitors connected in parallel to the stator winding produce resonant circuits in the stator with iron-containing inductors which are magnetically coupled both to one another and to the rotor. If the rotor is driven and the oscillation circuits in the stator are excited, for example, by a current surge in the rotor or by residual magnetism, largely undamped oscillations occur, although the excitation is absent. In this case, the asynchronous generators have excited themselves and can feed back electrical power.
  • At least one electronic control is advantageously assigned to the drive systems, the rotational speeds or speeds of the loads and the speed or speed ratios being specifiable by this electronic control.
  • the fact that the individual drive systems can be separately electronically controlled instead of using a rigid transmission coupling and thus the speeds or speeds as well as the speed or speed ratios are determined practically only by the electronic control means that a relatively high variability is achieved.
  • the electronic control comprises a spin-off control in order to control the drive systems in the event of a power failure while maintaining predeterminable speed or speed conditions down to the range of the speed or speed zero. Since defined drive conditions are maintained practically until or shortly before the spindles come to a standstill, not only is the yarn not torn, but also a yarn quality that is always constant despite a power failure is guaranteed. The downward control can in particular also be relatively even without disturbing, jerky changes in the respective drives.
  • the electronic control in contrast to the drive systems for the drafting system and the ring bench, has only a relatively low energy requirement, it is fundamentally conceivable to provide a battery backup for this electronic control.
  • the electronic control can also be supplied easily by the capacitor-excited asynchronous generator.
  • the drive system for a respective drafting system and preferably a ring bench can be controlled down to a predeterminable minimum drafting cylinder speed and can then be decoupled from the drafting system at least. While the drafting system comes to a standstill immediately, the spindle in question can generally continue to turn slightly. However, due to the relatively low speed, this has practically no effect.
  • the electric motors provided in the drive systems can preferably be controlled via frequency converters.
  • a frequency converter can be formed, for example, by a rectifier and an inverter; the setpoint frequency to which the assigned electric motor then adjusts can then be predetermined via the electronic control, for example to the relevant inverter.
  • a circuit consisting of three parallel branches, each with two transistors in series, is preferably assigned to the asynchronous motor operating as a capacitor-excited generator in the event of a mains failure, the connection point between see the two transistors of a branch each serve as a connection for the stator winding and the collector-emitter path of each transistor is bridged by a diode connected in opposite directions with respect to the forward direction of this path.
  • the drive system assigned to the drafting system is preferably supplied with current via the diodes in generator operation. As the speed of the spindles decreases, the power supply also decreases.
  • At least the drive systems associated with the drafting system and the spindles can be controlled separately to vary the predeterminable speed ratio.
  • the drafting cylinders can also be driven separately so that, for example, the draft can be varied.
  • the ring bench can also be controlled separately for variation, in particular the predeterminable speed ratio, spindle / ring bench.
  • the spindles can be driven in groups or by individual motors, with these electric motors or the motors of a group preferably being assigned common frequency converters.
  • the drafting system can be assigned its own drive system with several drives. It is conceivable to move the ring rail either together with the drafting system or by means of its own drive. While a separate spindle is normally assigned to each spinning station, the drafting system and the ring bench can each extend over several spinning stations, expediently over the entire length of one machine side.
  • the drive system assigned to the drafting system and / or the ring bench and the drive system assigned to the spindles are supplied with energy from the supply network by a common rectifier via a direct current intermediate circuit and the emergency supply in the event of a power failure via the direct line ⁇ DC link occurs.
  • a preferred variant of the ring spinning machine is characterized in that a drawing frame and a ring bench are provided on each machine side, and corresponding drawing frame strands and the two ring banks can be controlled together in each case.
  • FIG. 1 is a schematic partial representation of two different drive systems of a ring spinning machine
  • FIG. 2 further details of one of the two drive systems comprising three drives shown in FIG. 1.
  • the embodiment of a ring spinning machine shown comprises two (only partially shown) drive systems 10, 12.
  • the first drive system 10 is used to drive the spindles of the ring spinning machine (not shown).
  • the second drive system 12 is assigned to two drafting systems and two ring banks on the two ring spinning machine sides and for this purpose comprises three drives, as is indicated in FIG. 2.
  • FIG. 1 For the sake of simplicity, only a single spindle motor or its wiring is shown in FIG. 1 for the first drive system 10. Furthermore, in FIG. diglich one of the three drives of the second drive system 12 for the drafting systems and the ring banks shown, while in Fig. 2 the first drive system 10 for the spindles is missing.
  • the drive system 12 associated with the drafting systems and the ring banks and the drive system 10 associated with the spindles of the ring spinning machine are supplied with energy by a common rectifier 42 via a DC intermediate circuit 70 from a supply network indicated by a line 72.
  • the second drive system 12 is supplied with emergency power by the first drive system 10 or the motors acting there as a generator via the direct current intermediate circuit 70.
  • the drive system 10 has an asynchronous motor 14 which is speed-controlled in normal operation via a supply frequency and, in the event of a power failure, to supply the second drive system 12 via the direct current intermediate line 70 as a capacitor-excited generator (only one shown in FIG. 1).
  • the individual asynchronous motors 14 for the spindles are assigned a common frequency converter 42, 50 which, in addition to the rectifier 42, is additionally formed by a circuit or an inverter 50.
  • the circuit 50 consists of three mutually parallel branches 52, 54, 56, each with two transistors 58, 58 'in series; 60, 60 r , '62, 62A.
  • the lower half of the circuit 50 is only represented by dashed boxes, since it is identical to the upper circuit part.
  • the emitter of the upper transistor 58, 60, 62 is connected to the collector of the lower transistor 58 ', 60', 62 '. While the collectors of the upper titanium transistors are connected to line 70 are closed, the emitter of the lower transistors 58 ', 60', 62 'are connected to the other line of the intermediate circuit, not shown.
  • the connection points between the two transistors of a respective branch each form a connection for the stator or stator winding 16 of the asynchronous motor 14 assigned to a respective spindle.
  • each transistor 58 to 62 and 58 'to 62' is in each case bridged by a diode 64, 66, 68 or 64A 66A 68 'which is connected in opposite directions with respect to the forward direction of this path.
  • An electronic control 20 is also provided, by means of which in particular the inverter 50 of the spindle drive system 10 and inverters 44, 46, 48 (cf. also FIG. 2) of the second drive system 12 assigned to the drafting systems and the ring banks can be controlled are.
  • the control outputs of the controller 20 and the control inputs of the inverters are designated with the letter S in FIG. 1.
  • the control inputs of the transistors 58 to 62 and 58 'to 62' are controlled.
  • the stator winding 16 of the asynchronous motor 14 is provided in a star connection in the present example.
  • a star connection is by no means mandatory; in principle, for example, a delta connection can also be provided.
  • Three capacitors 18 are connected in parallel with this stator winding 16.
  • the capacitors 18 are connected to one another, for example, in the manner of a triangle (cf. FIG. 1) or a star, the various points of the capacitor triangle being connected to the three connections of the star circuit formed by the winding 16 in the present example are connected.
  • the transistors 58 to 68 and 58 'to 68' alternately carry current in order to fix the current flow through the winding 16.
  • the second drive system 12 is supplied with current via the diodes 64 to 68 and 64 'to 68' and the DC intermediate circuit 70.
  • the individual motors are connected to the common frequency converter 42, 50 in the machine end head via an energy distribution system.
  • the spindles can also be driven in groups or even by a single motor via tangential belts.
  • the second drive system 12 for the two drafting systems and the two ring banks on the two machine sides comprises three different drives with the frequency converters 42, 44; 42, 46 and 42, 48, which are formed by the common rectifier 42 lying between line 72 and line 70 and the individual inverters 44 to 48. Accordingly, the three drives are supplied with energy from line 72 by common rectifier 42 via direct current intermediate circuit 70 in normal operation.
  • the inverters 44, 46 and 48 of the three drives are each connected to the line or the DC intermediate circuit 70. These inverters 44 to 48 can also be controlled by the electronic control 20 (see FIG. 1), as indicated by the arrows S.
  • One inverter 48 is assigned to an asynchronous motor 38 for driving the two ring banks.
  • the speed of movement and the sequence of movements of the ring banks in relation to the spindles are important for the construction of the cop.
  • the respective coordination is carried out by the electronic control 20.
  • the two drives having the inverters 44 and 46 are drafting system drives.
  • the exact running of the drafting system cylinders in relation to each other and to the spindles is of crucial importance for the yarn count.
  • synchronous motors 22 to 36 are preferably used as drafting system motors.
  • the ring spinning machine has two drafting systems, one on each machine side.
  • Each drafting system comprises a front or delivery cylinder, a central cylinder and a rear or input cylinder. Due to the specified length (e.g. over 300 spindles per machine side), the cylinders are driven from both ends in order to avoid yarn errors due to torsional effects in these cylinders along the machine. Accordingly, two electric motors, in the present case synchronous motors, are provided per drafting system delivery cylinder.
  • the four motors 22 to 28 assigned to the inverter 44 are the following drafting system drive motors:
  • the two synchronous motors 22, 24 are assigned to the two ends of the delivery cylinder on one side of the ring spinning machine, while the two synchronous motors 26, 28 are assigned to the two ends of the delivery cylinder provided on the other side of the ring spinning machine.
  • the common inverter 46 is provided for the four synchronous motors 30 to 36.
  • the two synchronous motors 30, 32 are assigned to the two ends of the rear or middle cylinder on one side of the ring spinning machine, while the two synchronous motors 34, 36 are connected to the two ends of the rear or middle cylinder are assigned to the other side of the ring spinning machine.
  • the rear and middle cylinders on each machine side are combined to form a cylinder group and connected to one another via a change gear.
  • separate drives can also be provided for central and rear cylinders.
  • the electric motor 38 assigned to the two ring banks can be an asynchronous motor.
  • a toothed belt transmission, a clutch and a gear transmission can be provided, for example, between a respective motor shaft and a relevant drafting cylinder end.
  • the arrangement of a brake between the clutch and the gear transmission is also conceivable, for example to prevent the delivery roller from turning back after a spinning process.
  • the toothed belt transmission serves as a damping means which absorbs shocks emitted by the motor in question at low speeds and thus protects the sensitive gear transmission in the area of the drafting roller.
  • the toothed belt transmission is used for speed transmission in order to reduce the relatively high speed of the motor in question to a lower value at the input of a coupling in question.
  • the toothed transmission together with the toothed belt transmission serves for torque transmission, so that when a the respective motor is not loaded with the high moment of inertia of the stationary cylinder.
  • the effective retention capacity of the spindles is higher than that of the drafting unit.
  • the drafting system must therefore continue to be driven in the event of a power failure, in particular to prevent the yarn from tearing.
  • the power supply during such a power failure is provided by the speed-controlled asynchronous motors 14 for the spindles which operate in normal operation like the other motors via a supply frequency, but in the event of a power failure to supply the second drive system 12 as capacitor-excited generators.
  • the rotor of such a three-phase induction motor is driven over-synchronously by the spindle in question in the sense of the rotating field. This is equivalent to a negative slip.
  • no reactive current for excitation of the induction generator has to be taken from the network, or from synchronous machines, for example.
  • the initial conditions for a possible generator operating state are given by the fact that a voltage has inevitably applied to the three-phase induction motor before a respective power failure.
  • the capacitors connected in parallel to the stator winding result in the stator or stator three oscillation circuits with iron-containing inductors, which are magnetically coupled both to each other and to the rotor.
  • the electronic control 20 expediently comprises a spinning control, which is activated in the event of a power failure in order to drive the drive systems 10, 12 while maintaining defined speeds or speeds and speed or speed ratios up to at least approximately in the range of the speed or To slow down to zero speed.
  • the electronic control in contrast to the second drive system 12, requires only relatively little energy for the drafting system to be kept in operation and for the ring banks, it can be battery-buffered. However, this is not absolutely necessary. Rather, this control can also be fed via the capacitor-excited generator 14.
  • the speed or speed ratios can also be predetermined by the electronic control 20 during the sequence control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

Une machine textile, notamment un métier circulaire, comprend plusieurs systèmes d'entraînement (10, 12) de charges qui présentent au moins en partie des forces effectives d'inertie diverses. Le système d'entraînement (10) associé à la charge ayant la force effective d'inertie la plus grande comprend un moteur asynchrone (14) dont le régime est commandé pendant le fonctionnement normal par une fréquence d'alimentation et qui en cas de panne de courant fonctionne comme générateur excité par un condensateur afin d'alimenter en énergie au moins un autre système d'entraînement.
EP90901572A 1989-01-09 1990-01-09 Machine textile, notamment metier circulaire Expired - Lifetime EP0408703B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19893900408 DE3900408A1 (de) 1989-01-09 1989-01-09 Textilmaschine, insbesondere ringspinnmaschine
DE3900408 1989-01-09
PCT/EP1990/000042 WO1990007595A2 (fr) 1989-01-09 1990-01-09 Machine textile, notamment metier circulaire

Publications (2)

Publication Number Publication Date
EP0408703A1 true EP0408703A1 (fr) 1991-01-23
EP0408703B1 EP0408703B1 (fr) 1995-03-08

Family

ID=6371742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90901572A Expired - Lifetime EP0408703B1 (fr) 1989-01-09 1990-01-09 Machine textile, notamment metier circulaire

Country Status (5)

Country Link
EP (1) EP0408703B1 (fr)
JP (1) JPH03504147A (fr)
DE (2) DE3900408A1 (fr)
ES (1) ES2072421T3 (fr)
WO (1) WO1990007595A2 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4011598A1 (de) * 1990-04-10 1991-10-17 Rieter Ag Maschf Textilmaschine, inbesondere ringspinnmaschine
JPH0544118A (ja) * 1991-07-31 1993-02-23 Howa Mach Ltd 粗紡機における制御装置
JP2542542B2 (ja) * 1992-01-06 1996-10-09 株式会社日本紡績用品研究所 紡機の電源装置
DE4312023C2 (de) * 1993-04-13 2003-01-02 Rieter Ag Maschf Verfahren zum Betrieb einer Spinnmaschine und Spinnmaschine
CH686677A5 (de) * 1993-07-13 1996-05-31 Rieter Ag Maschf Steuerung fuer einen Spinnmaschinenantrieb.
DE4338283A1 (de) * 1993-11-10 1995-05-11 Schlafhorst & Co W Kreuzspulen herstellende Textilmaschine
DE4419614A1 (de) * 1994-06-01 1995-12-07 Vickers Inc Servomotor
DE19821251A1 (de) * 1998-05-12 1999-11-18 Csm Gmbh Verfahren zum Betrieb einer Spinnmaschine
JP2000078870A (ja) * 1998-08-31 2000-03-14 Murata Mach Ltd モータ駆動システム
DE10000146B4 (de) 2000-01-04 2006-09-07 Rieter Ingolstadt Spinnereimaschinenbau Ag Verfahren und Vorrichtung zur Steuerung einer Komponente einer eine Vielzahl gleichartiger Arbeitssteilen nebeneinander aufweisenden Textilmaschine
EP1927686B1 (fr) * 2006-12-01 2018-07-25 Maschinenfabrik Rieter Ag Métiers à tisser dotés d'un actionnement électrique
EP1927685A1 (fr) * 2006-12-01 2008-06-04 Maschinenfabrik Rieter Ag Jenny avec entraînement électrique

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
DE589763C (de) * 1931-04-08 1933-12-13 Siemens Schuckertwerke Akt Ges Einrichtung zum Bremsen von Asynchronmaschinen
DE1959014A1 (de) * 1969-11-25 1971-06-03 Barmag Barmer Maschf Textilmaschine mit Einrichtung zum gleichmaessigen Auslauf der Antriebsmotoren
CH548941A (de) * 1972-08-04 1974-05-15 Spinner Oy Verfahren zum verhindern des reissens eines fortlaufenden, vorwaertsbefoerderten erzeugnisses.
DE2353191C3 (de) * 1973-10-24 1978-09-14 Bernhard Kirsch Kg, 5500 Trier Einrichtung zur Notstromversorgung für aus einem Stromnetz gespeiste Elektrofahrzeuge
CH581714A5 (fr) * 1974-05-20 1976-11-15 Rieter Ag Maschf
DE3347113C2 (de) * 1983-12-27 1986-04-10 SKF GmbH, 8720 Schweinfurt Spinn- oder Zwirnmaschine mit Einzelantrieb
DE3412060A1 (de) * 1984-03-31 1985-10-10 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Einrichtung zum betreiben einer spinnerei- oder zwirnereimaschine
DE3442080A1 (de) * 1984-11-17 1986-05-28 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Maschine zum herstellen gedrehter oder gezwirnter faeden
DE3633627C2 (de) * 1986-10-03 1996-05-30 Schlafhorst & Co W Verfahren und Einrichtung zum Betrieb einer textile Fäden erzeugenden und/oder die Fäden auf Wickelkerne aufwickelnden Maschine
DE3641569C1 (en) * 1986-12-05 1988-03-24 Skf Textilmasch Komponenten Circuit arrangement for spinning or twisting machines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9007595A3 *

Also Published As

Publication number Publication date
DE3900408A1 (de) 1990-07-12
DE59008622D1 (de) 1995-04-13
EP0408703B1 (fr) 1995-03-08
WO1990007595A2 (fr) 1990-07-12
JPH03504147A (ja) 1991-09-12
WO1990007595A3 (fr) 1990-09-20
ES2072421T3 (es) 1995-07-16

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