EP0511549B1 - Rouleau pour chauffer un fil en mouvement - Google Patents

Rouleau pour chauffer un fil en mouvement Download PDF

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Publication number
EP0511549B1
EP0511549B1 EP92106470A EP92106470A EP0511549B1 EP 0511549 B1 EP0511549 B1 EP 0511549B1 EP 92106470 A EP92106470 A EP 92106470A EP 92106470 A EP92106470 A EP 92106470A EP 0511549 B1 EP0511549 B1 EP 0511549B1
Authority
EP
European Patent Office
Prior art keywords
circuit
galette
primary winding
frequency
primary
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 - Lifetime
Application number
EP92106470A
Other languages
German (de)
English (en)
Other versions
EP0511549A2 (fr
EP0511549A3 (en
Inventor
Uwe Dr. Baader
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.)
Oerlikon Barmag AG
Original Assignee
Barmag AG
Barmag Barmer Maschinenfabrik 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 Barmag AG, Barmag Barmer Maschinenfabrik AG filed Critical Barmag AG
Publication of EP0511549A2 publication Critical patent/EP0511549A2/fr
Publication of EP0511549A3 publication Critical patent/EP0511549A3/de
Application granted granted Critical
Publication of EP0511549B1 publication Critical patent/EP0511549B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders
    • H05B6/145—Heated rollers
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll

Definitions

  • the invention relates to a godet according to the preamble of claim 1.
  • This godet is known from DE-A-34 15 967.
  • the frequency of the primary current is variably controlled as a function of the measured temperature, so that the temperature can be kept constant. It is unavoidable that the frequency is also in electrically / magnetically unfavorable areas with low energy requirements.
  • the galette known from DE-OS 16 60 215 (Bag 599) is operated at a constant primary frequency.
  • the primary circuit ie the network
  • This galette is characterized by its simple structure.
  • the godet of FR-A-2 098 131 it has no separate secondary winding. The function of the secondary winding is taken over by the godet jacket.
  • a godet is known from DE-PS 18 04 777 (Bag. 651), which, in addition to the features mentioned in the preamble, has a hollow godet casing which is partly filled with a liquid and partly with steam from this liquid. With this godet, an outstandingly uniform temperature can be achieved over the entire length of the godet.
  • the disadvantage of this solution is again its high technical complexity.
  • the object of the invention is to reduce the effort with a firmly connected to the godet, electrically conductive secondary winding from z. B. to spare copper and yet to ensure good temperature control with minimal energy loss.
  • An improvement in the uniformity of the temperature distribution over the axial length of the godet can be achieved by the measure according to claim 4.
  • This invention is particularly advantageous to use in conjunction with this measure and allows the disadvantages of such a solution to be compensated for.
  • These disadvantages consist in the fact that the webs lying between the individual primary windings reduce the cross-sectional area of the electrical conductors available on the primary side and also the possible number of turns of these conductors. This leads to increased electrical power on the primary side Losses and due to the reduced number of turns to a deterioration of the cosine phi, which indicates the ratio of the usable active power to the apparent power consumed.
  • the invention makes it possible to match the desired and optimal alternating current frequency to one another by adapting the resonant circuit parameters, in particular inductance of the primary winding and capacitance.
  • the resonant circuit is preferably controlled via circuit breakers, which in turn can be controlled with a predetermined pulse train. This control can take place with a predetermined pulse sequence. However, temperature control is also desirable. It is therefore further proposed to apply the predetermined pulse sequence to the circuit breakers at control intervals. The duration of the control intervals depends on the temperature of the godet jacket. This temperature is measured by a temperature sensor which is attached to the godet casing in the inductive area of influence of the primary winding.
  • the circuit breakers serve both as switches and for input into the resonant circuits.
  • a particularly high cosine phi of almost 1 is made possible.
  • the two circuit breakers which are each assigned to a primary winding, are switched on in a half-bridge circuit with a constant direct voltage applied to the direct current intermediate circuit in the same current direction, and are controlled by a control circuit with a predetermined pulse sequence. This control can be switched on and off by a temperature controller depending on the temperature measured in the area of the assigned primary winding. Such a half-winding is assigned to each primary winding.
  • the inventive A special feature is that the inverters simultaneously serve as circuit breakers.
  • the resonant circuit is built up from the inductance of the primary winding and an additional capacitor.
  • This resonant circuit is connected to an alternating current, the amplitude of which is half the voltage of the direct current intermediate circuit.
  • the inductance of the primary winding and the capacitance of the capacitor are matched to one another in such a way that the feed frequency of the resonant circuit is somewhat greater than the resonant frequency of the resonant circuit. In this way it can be achieved that the transistors, which serve as circuit breakers, are switched off in an almost currentless state.
  • the shaft 30 has a conical end 31 at its free end and then a concentric screw 36.
  • the godet jacket 32 is fastened to the conical end 31 of the godet.
  • the godet casing 32 is a circular cylinder which concentrically surrounds the shaft 30 and on the bearing side of the Wave 30 is open.
  • the opposite end face of the godet casing 32 is closed by a cover 33.
  • the cover 33 is fixedly connected to a hub 34 directed into the interior of the godet casing 32.
  • the hub 34 is drilled out conically, to match the cone at the front end of the shaft 30.
  • the hub is placed on this cone 31 of the shaft 30 and firmly clamped by means of a nut 35 which is screwed onto the screw 36.
  • a protective cap 37 sits at the front on the cover 33.
  • the inner diameter of the godet casing is larger than the outer diameter of the hub 34 and the shaft 30.
  • An annular space is thus formed between the inner circumference of the godet casing 32 and the outer circumference of the hub 34 and shaft 30. This annulus is filled by the package of primary windings, which are fixed and stationary.
  • a cooling pipe 39 is fastened to the stationary holder 38 concentrically with the shaft 30. The cooling tube protrudes into the said annular space and extends up to the front cover 33.
  • each primary winding package consists of a flux tube 41, the flux poles 42 and the primary winding 40.
  • the flux tubes 41 and flux poles 42 consist of magnetically highly conductive material.
  • the flow tubes each extend over the area of a primary winding.
  • the packets formed in this way are threaded with the flux tubes 41 onto the cooling tube 39 with tight play and are screwed with the longitudinal screws Bracket clamped, with flux discs 43 are still provided at the two ends of the overall package.
  • Galette jacket 32 consists only of magnetically conductive material, especially iron, and contains no copper deposits or deposits or coatings of good electrically conductive material. This makes the godet casing considerably cheaper. Furthermore, the manufacture of such a godet casing is technically simple. Above all, however, the godet jacket becomes more robust, since there is a risk with conventional godet jackets that the electrically conductive coatings or inserts become detached.
  • the godet casing 32 can be freely rotated with respect to the winding packages and is driven to rotate.
  • the windings 40 are supplied with energy by the stationary holder 38 in a circuit diagram according to FIG. 2.
  • the energy is supplied from phases L1, L2, L3 of a three-phase network.
  • the three-phase current is rectified and smoothed by rectifiers 4 and 5 as well as choke 6 and capacitance 7. This creates a DC link with positive phase 8 and a negative phase.
  • This primary voltage intermediate circuit feeds three primary windings 22 (designated 40 in FIG. 1) of the godet. These primary windings are arranged coaxially to one another in a stationary manner within the iron, rotating godet casing 32 (FIG. 1). In this case, the primary windings lie between the legs 42 of the iron packet which are designed as radial rings and are U-shaped in axial section.
  • Adjacent primary windings each have one leg in common (see, for example, DE-PS 16 60 232 (Bag. 599)).
  • Such a multi-zone godet can achieve a good temperature distribution over the length of the godet casing if a temperature sensor 26 is arranged in the godet casing adjacent to each of the primary windings.
  • a temperature sensor can e.g. B. on the inner skin of the godet casing are glued or otherwise fastened.
  • the solution according to DE-PS 16 60 215 is also considered.
  • the power supply for each primary winding comprises the transistors 9 and 10, which are connected in series and with the same flow direction between the two phases of the DC link.
  • a drive circuit 11 also belongs to the power supply of each primary winding. Through this commercially available control circuit 11, the transistors 9 and 10 are controlled or blocked at a predetermined frequency. These two switching states are predetermined by a temperature controller 14, which is connected to the control circuit 11 via a line 24. The temperature controller in turn is controlled on the one hand by the temperature sensor 16 already mentioned and on the other hand by a setpoint generator 15.
  • the control circuit is switched when the temperature falls below the target temperature so that a predetermined control voltage is output to the transistors 9 and 10 via the lines 12 and 13 with a predetermined pulse sequence (supply frequency of the resonant circuit) or that when exceeded the predetermined target temperature, the transistors 9 and 10 are blocked.
  • the transistors 9 and 10 of each power supply are connected to the DC voltage intermediate circuit 8 with free-wheeling diodes 17, 18 in a half-bridge circuit. Between the center point 19 of the half-bridge and one of the two conductors - here the negative conductor of the DC link - lies the respectively assigned primary winding 20 for inductive heating of a godet zone.
  • the secondary winding is shown in the circuit diagram of FIG. 2 as an electrical symbol for an inductor.
  • it is not a conventional conductor material made in particular of copper or brass, but exclusively the iron godet jacket.
  • the iron godet jacket has the dual function of a) the electrical conductor of the secondary winding forming a single turn and b) the iron core of the secondary winding.
  • each heating zone is connected to the previously mentioned conductor of the DC link via a capacitor 25. Therefore, the primary winding 20 and the capacitor 25 form a resonant circuit, which is acted upon by the transistor 10 in the operating phases with a pulsating direct current with a predetermined supply frequency and half the voltage of the direct current intermediate circuit.
  • the capacitance of the capacitor 25 is preferably designed to be somewhat lower than the feed frequency of the resonant circuit specified by the control circuit 11.
  • the drive circuit is set so that the transistors 9 and 10 are driven at a frequency which is above 500 Hz.
  • An upper limit is set by the load capacity of the components, in particular diodes and transistors, by the switching losses of the transistors and by the increasing losses of the primary-side circuit.
  • a limitation for the optimal frequency should help 2000 Hz. Good results were achieved at a set frequency of 1500 Hz. In particular in the range between 1000 and 2000 Hz, it is possible without affecting the components to use the transistors 9 and 10 serving as inverters at the same time for switching the primary circuit on and off.
  • the voltage diagram shows a pulsating DC voltage in the operating phases. The amplitude of this DC voltage is 250 V if the voltage drop of the DC link is 500 V.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Claims (5)

  1. Rouleau pour chauffer un fil en mouvement, comprenant un enroulement primaire fixe (40) et une enveloppe de rouleau (32) magnétiquement perméable qui est montée en rotation concentriquement à l'enroulement primaire (40) et est reliée inductivement à l'enroulement primaire (40) en passant par un entrefer étroit, en vue de la production de courants secondaires et qui ne présente pas d'enroulement secondaire défini et en particulier comporte ni insert ni revêtement de cuivre, caractérisé par le fait qu'il est prévu un circuit de commande (11) qui alimente l'enroulement primaire (40) avec un courant alternatif de fréquence réglable de façon fixe d'au moins 300 Hz, de préférence supérieure à 500 Hz, que l'enroulement primaire est monté dans un circuit oscillant qui est accordé à la fréquence de courant alternatif réglée, que l'alimentation en courant du rouleau se compose d'une source de tension alternative et d'un circuit intermédiaire à tension continue (8) qui est alimenté à partir de cette source et à partir duquel le circuit oscillant peut être commandé en passant par des interrupteurs de puissance avec un train d'impulsions prédéterminé, par le fait que les interrupteurs de puissance (9, 10) sont fermés par un régulateur de température (14) associé en fonction de la température mesurée dans la zone de l'enroulement primaire (40) en cas de dépassement vers le bas d'une température de consigne prédéterminée et sont alors commandés par le train d'impulsions et sont coupés en cas de dépassement vers le haut d'une température de consigne prédéterminée.
  2. Rouleau suivant la revendication 1, caractérisé par le fait que la fréquence supérieure à 300 Hz, de préférence supérieure à 400 Hz, est prédéterminée de telle manière que compte tenu de la résistance électrique de l'enveloppe de rouleau (32) et de la fréquence, l'énergie nécessaire soit transmise à l'enveloppe de rouleau (32) avec un cosinus phi élevé de préférence cosinus phi > 0,9.
  3. Rouleau suivant la revendication 1 ou 2, caractérisé par le fait que la fréquence est supérieure à 900 Hz, de préférence supérieure à 1000 Hz et est de préférence située entre 1000 et 2000 Hz.
  4. Rouleau suivant l'une des revendications précédentes, caractérisé par le fait que plusieurs enroulements (40) sont disposés, côté primaire, axialement côte à côte et sont séparés les uns des autres par des branches communes de leur noyau de fer.
  5. Rouleau suivant l'une des revendications 1 à 4, caractérisé par le fait que chaque circuit oscillant, composé d'un des enroulements primaires (20) du rouleau ainsi que d'un condensateur (25), est relié au point milieu de deux interrupteurs de puissance électroniques (9, 10) et à l'une des branches du circuit intermédiaire à tension continue (8), les interrupteurs de puissance électroniques (9, 10) étant, en demi-pont, disposés entre les phases du circuit intermédiaire à tension continue (8).
EP92106470A 1991-04-27 1992-04-15 Rouleau pour chauffer un fil en mouvement Expired - Lifetime EP0511549B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4113832 1991-04-27
DE4113832 1991-04-27
US07/873,414 US5362945A (en) 1991-04-27 1992-04-24 Godet for heating an advancing yarn

Publications (3)

Publication Number Publication Date
EP0511549A2 EP0511549A2 (fr) 1992-11-04
EP0511549A3 EP0511549A3 (en) 1993-01-27
EP0511549B1 true EP0511549B1 (fr) 1995-07-05

Family

ID=25903215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106470A Expired - Lifetime EP0511549B1 (fr) 1991-04-27 1992-04-15 Rouleau pour chauffer un fil en mouvement

Country Status (3)

Country Link
US (1) US5362945A (fr)
EP (1) EP0511549B1 (fr)
DE (1) DE59202786D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950703675A (ko) * 1992-10-01 1995-09-20 클라우스 퓌팅, 디이터 핑슈텐 얀을 유도하고 진행시키기 위한 고데트(godet for guiding and advancing a yarn)
DE4313837C1 (de) * 1993-04-29 1994-09-01 Neumag Gmbh Verfahren zum induktiven Beheizen einer Galette und induktiv beheizte Galette
US5660754A (en) * 1995-09-08 1997-08-26 Massachusetts Institute Of Technology Induction load balancer for parallel heating of multiple parts
DE19610763A1 (de) * 1996-03-19 1997-09-25 Zinser Textilmaschinen Gmbh Beheizte Galette zum Erwärmen synthetischer Fäden
CN1135908C (zh) * 1996-06-18 2004-01-21 巴马格股份公司 用于加热行进着的合成纤维的导丝轮
DE19854034A1 (de) * 1998-11-16 2000-05-18 Walzen Irle Gmbh Induktionsheizung für Thermowalzen
DE102007054147A1 (de) * 2007-11-12 2009-05-20 Khs Ag Leimwalze sowie Etikettieraggregat mit einer solchen Leimwalze

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1660215B2 (de) * 1965-12-03 1973-10-04 Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal Regelbar beheizte Galette
BE716725A (fr) * 1965-12-03 1968-12-02
US3412229A (en) * 1966-10-20 1968-11-19 Cameron Brown Capital Corp Electric heating means
RO55797A (fr) * 1967-08-16 1974-01-03
DE1660235C3 (de) * 1967-08-16 1980-06-26 Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal Induktiv beheizbare Galette
US3448233A (en) * 1967-09-26 1969-06-03 Pillar Corp Induction heating assembly
US3508024A (en) * 1968-06-17 1970-04-21 Gen Electric Dual inductance induction heater
BE736709A (fr) * 1968-10-24 1969-12-31
GB1319318A (en) * 1970-07-01 1973-06-06 Platt International Ltd Inductively heatable roller having a temperature sensor
US3718852A (en) * 1971-07-14 1973-02-27 Gen Electric Phase angle regulator for high frequency inverter
DE2608295C2 (de) * 1976-02-28 1982-11-18 Brown, Boveri & Cie Ag, 6800 Mannheim Elektronischer Temperaturregler zur Regelung der Energiezufuhr für ein elektrisches Heizelement
AT365028B (de) * 1978-04-11 1981-12-10 Vertina Anstalt Verfahren und anlage zum induktiven erwaermen von metallischen werkstuecken
DE2950411C2 (de) * 1979-12-14 1986-07-03 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen Gleichrichtervorrichtung mit gesiebter Ausgangsspannung
US4426564A (en) * 1979-12-26 1984-01-17 General Electric Company Parallel resonant induction cooking surface unit
DE3236033A1 (de) * 1982-09-29 1984-03-29 Robert Bosch Gmbh, 7000 Stuttgart Schraubvorrichtung
DE3415967A1 (de) * 1983-05-07 1984-11-22 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Induktive heizung fuer ferromagnetische materialien
US4675487A (en) * 1983-10-03 1987-06-23 Valmet Oy Apparatus and method for electromagnetic heating of a roll
US5027002A (en) * 1989-10-04 1991-06-25 Westinghouse Electric Corp. Redundant power bus arrangement for electronic circuits
US5233509A (en) * 1992-04-03 1993-08-03 International Business Machines Corporation Switch-mode AC-to-DC converter

Also Published As

Publication number Publication date
EP0511549A2 (fr) 1992-11-04
DE59202786D1 (de) 1995-08-10
EP0511549A3 (en) 1993-01-27
US5362945A (en) 1994-11-08

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