US3611079A - Winding apparatus with programmed torque control - Google Patents

Winding apparatus with programmed torque control Download PDF

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Publication number
US3611079A
US3611079A US54258A US3611079DA US3611079A US 3611079 A US3611079 A US 3611079A US 54258 A US54258 A US 54258A US 3611079D A US3611079D A US 3611079DA US 3611079 A US3611079 A US 3611079A
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US
United States
Prior art keywords
motor
voltage
programmed
drum
control system
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
US54258A
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English (en)
Inventor
Curtis L Ivey
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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Publication date
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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
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
    • B65H18/20—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web the web roll being supported on two parallel rollers at least one of which is driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
    • B65H18/145—Reel-to-reel type web winding and unwinding mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/40—Shafts, cylinders, drums, spindles
    • B65H2404/43—Rider roll construction
    • B65H2404/434—Driven rider roll arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/20—Calculating means; Controlling methods
    • B65H2557/25—Modular control, i.e. systems which work independently or partially dependently on other systems

Definitions

  • winding is accomplished with a configuration of two rotating drums in which a web of material is adapted to pass up between the two drums located in spaced relationship to each other, and then pass around a small core, the tension on the material being rolled being then progressively decreased or increased in accordance with some program detennined by the manufacturer.
  • Another common technique is to drive each drum with a DC motor; the back drum motor (by definition the motor nearer to the entering web of material) is speed or voltage regulated, while the front motor is current regulated to thereby torque regulate the front drum.
  • This technique has several disadvantages.
  • One is that when the winder is being threaded, there is no force to hold the drum speeds in synchronism, and a current regulated drum will accelerate to saturation or even destruction, if its speed is not limited by some dead-band arrangement.
  • the dead-band is necessary because in order to operate normally, the voltages of the two motors are of necessity different because of difi'erences in IR drop resulting from different torques. A typical overspeed may be 2400 percent. This is obviously quite unsafe.
  • Still another method is to regulate or control the field of the front drum motor. This is perhaps the most crude technique, suffering from nonlinearity and unsuitability at low speeds and low tensions.
  • This invention relates to a programmed torque control system for winding a web of material, supplied at constant tension, into a roll of material having programmed tensive gradations throughout, by controlling the magnitudes of the torques developed by first and second drum winders, driven by electric motors respectively. Means are provided for speed regulating the motor for the second drum. Means are also provided for obtaining control signals which are a function of the torque magnitudes selected for the respective drum winders.
  • means are provided for voltage regulating the motor associated with the first drum, which latter means are connected to the terminals of the first motor, and coupled both to the varying control signal means and to the terminals of the second motor, the terminal voltage of the first motor being then a function of the varying control signals and the tenninal voltage of the second motor.
  • FIG. 1 is a schematic diagram showing two drum winders coupled to respective electric motor drives, and showing a web of material being fed from a supply reel for winding on a core;
  • FIG. 2 is an electrical schematic depicting the torque program control circuitry in accordance with the invention.
  • FIGS. 3A, 3B, 3C, and 3D are diagrams used in explaining the torque program distribution between the front and back drums
  • FIG. 4 is a schematic diagram showing the voltage and speed regulation arrangement for the front and back drum motors respectively, in accordance with one illustrative embodiment of the invention.
  • FIG. 5 is an electrical schematic showing the voltage and speed regulation arrangement for the front and back drum motors respectively, in accordance with another illustrative embodiment of the invention.
  • FIG. 1 there is shown a typical two-drum winder arrangement.
  • a spool of material 10 processed by the manufacturer, unwinds a web of material 12 which is under constant tension provided in any convenient manner such as by means of tensive regulator 14, to the drum winders identified at l6, 18.
  • the drums l6 and 18 are driven by DC shunt motors indicated symbolically at 20 and 22 respectively.
  • the drum 16 is further identified as the second or back drum, and the drum 28 is further identified as the first or front drum.
  • the drum farthest from the entering web material is denominated the front drum.
  • both drums are driven counterclockwise.
  • the web of material 12 passes under drum l6 and then around a core 24, the roll of material gradually building up to the finished roll 26.
  • a roller or rider 28 transmits some force (supplied pneumatically or hydraulically) to hold the emerging roll tightly against the surface of the two drums.
  • the core 24 is forced down against the drums mechanically to prevent slippage, the force being gradually reduced as the weight of the growing roll increases to substitute in whole or in part for this force.
  • the object of winding is to produce a high quality shipping roll, and to that end it is usually desirable that the initial tension applied in rolling, gradually tapers off so that the inner wraps are wound much tighter on the core 24 than are the outer wraps.
  • Most manufacturers of raw materials have their own winding schedule to satisfy their own requirements.
  • the instant invention is not intended to adopt any particular winding program, but instead discloses a control system which will provide any programmed torque which may be desired in accordance with the specifications of the manufacturer based on his own specific requirements.
  • the invention proposes that the terminal voltage of the front drum motor be voltage requlated, in accordance with a torque program distribution between both drums, to enable more precise control than the current regulation schemes of the prior art, while at the same time eliminating the difficulties with the present prior art systems.
  • the front and back drum motors may be connected in accordance with the arrange ments shown in either FIG. 4 or FIG. 5.
  • V terminal voltage of the motor
  • the torque program circuitry of FIG. 2 provides a corrective voltage e in accordance with the following:
  • corrective voltage a an operator's adjustment (potentiometer) in the region (0l) which determines the magnitude of the torque developed by the front drum 18, at the completion of the winding operation.
  • I an operators adjustment (potentiometer) in the region (0-l which determines the magnitude of the torque developed by the front drum at the beginning of the winding operation.
  • D a multiplier decreasing monotonically from l to 0) as a function of the increasing roll diameter.
  • the torque program control circuitry for realizing equation (2l is shown in FIG. 2.
  • the circuitry comprises operational amplifiers indicated at 30, 32, 34 and 36 having respective gains indicated on the drawing.
  • the output of the operational amplifier 30 is connected to potentiometers 38 and 40 as indicated.
  • the potentiometer 38 supplies the a adjustment and potentiometer 40 supplies the b" adjustment.
  • the slides 42 of potentiometer 38 is connected as one input to operational amplifiers 34 and 36 respectively.
  • the slide 44 for the potentiometer 40 supplies the input to the operational amplifier 32.
  • the output of operational amplifier 32 is connected as an input to operational amplifier 34.
  • the output of the operational amplifier 34 is connected across a potentiometer 46, the slide 48 being connected as one input to theoperational amplifier 36.
  • the slide 48 of the potentiometer 46 is coupled by a cam arrangement, indicated symbolically at 50, so that it is driven as a function of the enlarging diameter of the roll FIG. 1: 26.
  • a calibrating potentiometer 52 is connected between the output of amplifier 36 and ground, and by means of slide 54 the magnitude of V may be adjusted.
  • the output e then may be adjusted by means of the calibration potentiometer 52 to provide the actual signal correction voltage V
  • the (2" potentiometer 38 effects only the end of the program, and the b" potentiometer effects only the start of the program.
  • FIGS A few of the possible torque control programs are indicated in FIGS.
  • 3A, 3B, 3C and 3D depict the per unit web tension versus the per unit diameter for various "0 and b" adjustments selected by the operator.
  • the figures show typical curves for various values of a and b" as the programmed diameter varies from the core to the end of the program diameter, which in each of the cases has arbitrarily been selected as one-half the maximum roll diameter.
  • the solid line in each of these figures indicates the tension of the front drum and the dashed line identifies the tension of the back drum.
  • the back drum (as indicated by the dashed line) at the end of the program supplies 70 percent of the total tension and the front drum supplies 30 percent.
  • the front drum supplies 70 percent of the total tension and the back drum supplies 30 percent.
  • FIG. 3D the back drum supplies percent and the front drum supplies 20 per cent.
  • FIGURES 4 AND 5 EMBODIMENTS The corrective voltage V may be utilized with either the system shown in FIG. 4 or that shown in FIG. 5.
  • the motor 20 is energized by a generator 56.
  • the motor 22 for the front drum 18 is connected in series with a booster generator 58, the serial combination of motor 22generator 58 being connected in parallel with the generator 56.
  • the back drum motor is speed regulated, a tachometer 60 supplying an error voltage to the summation junction 62.
  • a speed reference voltage is also applied to the summation point 62 and any dif- 5 ference is amplified by the amplifier 64 and applied to the field 66 of the generator 56.
  • the motor 22 is voltage regulated by the torque program control circuitry of FIG. 2.
  • the corrective voltage V is supplied to the summation junction 68.
  • a voltage from the booster generator 58 is fed back at 70 to the summation point 68 and any difference is amplified by the amplifier 72 and applied to the field 74 of the generator 58.
  • the terminal voltage of the motor 22 is that of the generator 56 plus whatever increment is supplied by the booster generator 58.
  • the motor 20 is connected to generator 76 as indicated.
  • the motor 20 is speed regulated by means of tachometer 78 which supplies an error voltage to the summation junction 80.
  • a speed reference is also applied to the summation junction 80 and any difference is amplified by the amplifier 82 and applied to the field 84 of the generator 76.
  • the motor 22 is supplied by a generator 86.
  • the corrective voltage V is fed to the summation junction 88, and there is also fed to this junction a feedback voltage from the back drum motor at 90.
  • the voltage of the generator 86 is also fed back at 92 to the summation junction 88.
  • V is the back drum voltage at 90 is also and the feedback 92 is negative; any difference is then fed to the amplifier 94 and applied to the field 96 of the generator 86.
  • the terminal voltage of the motor 22 is then a function of V as well as the voltage of the back drum motor 20. It should be noted at this point that the voltage supply need not be obtained from rotating equipment, but static supplies, thyristors or the like may also be used.
  • c. means for voltage regulating said first motor, connected to the terminals of said first motor, and coupled both to said varying control signal means and to the terminals of said second motor, the terminal voltage of said first motor being a function of both said varying control signals and the terminal voltage of said second motor.
  • said voltage regulating means comprises variable voltage supply means in series with said first motor, the serial combination being electrically in parallel with said second motor, said varying control signals being applied to said voltage supply means to vary the output thereof.
  • said voltage regulating means comprises variable voltage supply means and voltage summation means, said variable voltage means being connected across the terminals of said first motor and having a feedback path connected to said voltage summation means, said voltage summation means being coupled to said second motor and to said varying control signal means and having a summation output connected to said variable voltage supply means to vary the voltage output thereof.
  • D a multiplier decreasing monotonically from I to 0 as a function of the increasing roll diameter.
  • variable voltage supply means is an electric generator.
  • variable voltage supply means is an electric generator.
  • variable voltage supply means is an electric generator having a field winding to which said variable control signals are applied.
  • variable voltage supply means is an electric generator having a field winding to which said summation output is applied.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Multiple Motors (AREA)
US54258A 1970-07-13 1970-07-13 Winding apparatus with programmed torque control Expired - Lifetime US3611079A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5425870A 1970-07-13 1970-07-13

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Country Status (4)

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US (1) US3611079A (de)
JP (1) JPS527105B1 (de)
CA (1) CA941490A (de)
FR (1) FR2103016A5 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4292572A (en) * 1979-07-26 1981-09-29 Dresser Industries, Inc. Method and apparatus for regulating electric motor armature currents
EP1000892A1 (de) * 1998-11-09 2000-05-17 Voith Sulzer Papiertechnik Patent GmbH Verfahren zum Betreiben einer Rollenwickeleinrichtung und Rollenwickeleinrichtung
US20030030395A1 (en) * 2001-08-02 2003-02-13 Ballard Power Systems Corporation Method and apparatus for high performance permanent magnet motor speed control with limited position information

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2739515C3 (de) * 1977-09-02 1981-04-16 Jagenberg-Werke AG, 4000 Düsseldorf Vorrichtung zum Aufwickeln einer Warenbahn, insbesondere aus Papier
SE450703B (sv) * 1982-04-01 1987-07-20 Asea Ab Sett for kontrollering av den i en parullad pappersrulle inrullade materialspenningen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156397A (en) * 1961-05-02 1964-11-10 Ass Elect Ind Control of strip driving means
US3372320A (en) * 1965-05-12 1968-03-05 Du Pont Web winding apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156397A (en) * 1961-05-02 1964-11-10 Ass Elect Ind Control of strip driving means
US3372320A (en) * 1965-05-12 1968-03-05 Du Pont Web winding apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4292572A (en) * 1979-07-26 1981-09-29 Dresser Industries, Inc. Method and apparatus for regulating electric motor armature currents
EP1000892A1 (de) * 1998-11-09 2000-05-17 Voith Sulzer Papiertechnik Patent GmbH Verfahren zum Betreiben einer Rollenwickeleinrichtung und Rollenwickeleinrichtung
US6325321B1 (en) 1998-11-09 2001-12-04 Voith Sulzer Papiertechnik Patent Gmbh Process for operating a reel winding device, a reel winding device, and a measuring device
US20030030395A1 (en) * 2001-08-02 2003-02-13 Ballard Power Systems Corporation Method and apparatus for high performance permanent magnet motor speed control with limited position information
US6700342B2 (en) * 2001-08-02 2004-03-02 Ballard Power Systems Corporation Method and apparatus for high performance permanent magnet motor speed control with limited position information

Also Published As

Publication number Publication date
JPS527105B1 (de) 1977-02-28
JPS472962A (de) 1972-02-14
FR2103016A5 (de) 1972-04-07
CA941490A (en) 1974-02-05

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