EP1188849B1 - Method of controlling single spindle driving motors of a spinning machine - Google Patents

Method of controlling single spindle driving motors of a spinning machine Download PDF

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Publication number
EP1188849B1
EP1188849B1 EP20010121715 EP01121715A EP1188849B1 EP 1188849 B1 EP1188849 B1 EP 1188849B1 EP 20010121715 EP20010121715 EP 20010121715 EP 01121715 A EP01121715 A EP 01121715A EP 1188849 B1 EP1188849 B1 EP 1188849B1
Authority
EP
European Patent Office
Prior art keywords
spindle
motor
direct current
thread
stop
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
EP20010121715
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1188849A3 (en
EP1188849A2 (en
Inventor
Norimoto Minoshima
Yutaka Shinozaki
Masashi Kaneko
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.)
Toyota Industries Corp
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Toyota Industries Corp
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Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP1188849A2 publication Critical patent/EP1188849A2/en
Publication of EP1188849A3 publication Critical patent/EP1188849A3/en
Application granted granted Critical
Publication of EP1188849B1 publication Critical patent/EP1188849B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
    • D01H9/14—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements for preparing machines for doffing of yarns, e.g. raising cops prior to removal
    • 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
    • D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
    • D01H1/244—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles each spindle driven by an electric motor

Definitions

  • the present invention relates to a method of controlling single spindle driving motors of a spinning machine such as a ring spinner or a ring throwing machine, for independently driving the respective spindles by individual motors.
  • a machine that has been proposed recently has, instead of only one motor for driving all spindles in a spinning frame, a plurality of spindle driving motors so that each spindle has its own motor. This has been proposed for the purpose of making it possible to set a large number of spindles in the spinning frame, or to increase the rotational speed of the spindles.
  • the single spindle driving motor is provided in each of the spindles as described above, a problem of spindle rotation may occur in doffing differently from the case of a ring spinner of a belt driving method where a plurality of spindles are driven by one belt.
  • the spindle that is directly driven by the single spindle driving motor is rotated by the thread tension, and the thread ranging from the spindle to the full bobbin is difficult to be cut at a desired position.
  • the position of the traveler is easy to change and the thread ranging to a draft part through the traveler is liable to break at the time of restarting of the frame after doffing.
  • Japanese Patent Application Laid-open No. 1-306629 propose a braking device of a spinning machine using as a single spindle driving motor a polyphase AC motor, which comprises: a first power supply that supplies a driving current to the motor at the time of normal spinning; a second power, supply that applies to the motor a rotational torque toward an opposite direction to that at the time of normal spinning; a changeover switch for changing the above two power supplies; and a brake control circuit for operating the changeover switch, is proposed in.
  • the spinning frame is provided with the braking device disclosed in Japanese Patent Application Laid-open No. 1-306629 described above, the defect accompanied with the spindle rotation in doffing can be eliminated.
  • the device is provided with the two power supplies and therefore needs a changeover switch for the power supplies and a brake control circuit for operating the changeover switch. Thus, the structure becomes complicated, and the cost is increased.
  • German patent application DE-A-4010376 describes a ring spinner spindle drive which has a motor controlled by means of switches and a permanently energised rotor. This document discloses in combination the features forming the pre-characterizing portion of claim 1.
  • the present invention has been made in view of the above problems, and an object of the present invention is therefore to provide a method of controlling single spindle driving motors of a spinning machine that can prevent a spindle from being rotated to such an extent that a trouble occurs at the time of restarting due to tension of a thread in doffing by controlling a single spindle driving motor with one power supply and also without a changeover switch.
  • the present invention provides a method of controlling single spindle driving motors of a spinning machine which independently drive each spindle with an individual motor, wherein a synchronization motor is used as the motor; the synchronization motor is controlled through an inverter; and after a doffing stop and at least during removal of a bobbin from the spindle, each of the motors is supplied with a direct current to hold the spindle so that rotation is limited, characterised in that; while the motor is stopped, it is supplied with a direct current which is less than the direct current which is supplied when the bobbin is removed from the spindle.
  • a direct current is supplied to the synchronization motor for driving the spindle at the time of pulling the full bobbin out of the spindle. Therefore, an excitation state of a stator of the motor is held at a constant level, and a magnetic force for holding a rotator at a stop position acts on the rotator. As a result, even if the tension acting on a thread at the time of pulling out the full bobbin tries to rotate the spindle, the rotation of the spindle is limited. Thus, the spindle can be prevented from being rotated to such an extent that a trouble occurs at the time of restarting.
  • a holding force for suppressing the rotation of the rotator from the stop position by the action of an external force always acts while the action of the holding force is not limited to the time of pulling out the full bobbin.
  • an inverter is mounted with each of the motors. Therefore, the motor of each of the spindles can be controlled with high precision.
  • the present invention provides a method of controlling single spindle driving motors of a spinning machine by independently driving each spindle with an individual motor, characterised in that; a synchronization motor that enables a step operation is used as the motor; the synchronization motor is controlled through an inverter; and the motor is slightly rotated in a direction opposite to that in a spinning operation at least while a bobbin is removed from the spindle after a doffing stop.
  • the motor that enables the step operation such as a switched reluctance motor
  • the motor is driven so as to slightly rotate the spindle in the opposite direction to that in the spinning operation (for example, 1/4 rotation or less) instead of holding the spindle at a stop position.
  • the force against the torque for rotating the spindle by the thread tension is larger in the case where the motor is rotated in the opposite direction in comparison with the case where a stator is excited so as to stop the spindle at a predetermined position.
  • the spindle is rotated in the opposite direction, whereby the action against the torque for rotating the spindle by the thread tension increases, and also cutting of the thread is smoothly carried out by a cutter equipped to the spindle.
  • an alternating-current power supply 1 is connected with an AC/DC converter 2.
  • a draft motor 3 constituting a draft part drive system is connected with the AC/DC converter 2 through an inverter 4.
  • the draft part drive system is connected with a lifting drive system (not shown) for raising or lowering a ring rail and a lappet angle through a rotation transmitting means (not shown) so as to be operatable with synchronization, and the draft motor 3 also drives the lifting drive system.
  • Respective spindles of a spinning machine are provided with single spindle driving motors 6, respectively, for independently driving each spindle 5 (shown in Fig. 3).
  • Synchronization motors are used for the single spindle driving motors 6.
  • switched reluctance motors SR motors
  • the single spindle driving motors 6 are connected with the AC/DC converter 2 through separate spindle control devices 7 and a chopper circuit 8.
  • the chopper circuit 8 changes output of the AC/DC converter 2 to a voltage suitable for a driving power supply of each of the single spindle driving motors 6 to output the voltage.
  • the inverter 4 and the respective spindle control devices 7 are electrically connected with a frame control device 9.
  • the frame control device 9 is provided with a CPU 10, a memory 11, and an input device 12.
  • the CPU 10 is connected with the input device 12 through an input interface (not shown), is connected with the inverter 4 through an output interface (not shown), and is connected with the respective spindle control devices 7 through a serial interface (not shown).
  • the CPU 10 operates based on a predetermined program data stored in the memory 11.
  • the memory 11 stores the program data and various data necessary for carrying out the program.
  • the program data includes corresponding data on spinning conditions such as various fiber materials, spinning count and the number of twists, rotational speed of a spindle at the time of a steady operation, rotational speed of the draft motor 3, and the like.
  • the memory 11 stores a control program in a frame stop of the single spindle driving motor 6 until restarting of the frame after a stop of doffing.
  • the control program in a frame stop supplies the single spindle driving motor 6 with direct current for a predetermined time at least at the time of pulling a bobbin out of the spindle 5 in a doffing operation and supplies the single spindle driving motor 6 with direct current smaller than that at the time of pulling out the bobbin (for example, direct current approximately one third as large as that at the time of pulling out the bobbin) during the frame stop until the restarting of the frame after doffing except for the time of pulling out the bobbin. That is, during the frame stop, small direct current is supplied without stopping current supply to the single spindle driving motor 6, and larger direct current is supplied at the time of pulling out the bobbin.
  • a time for changing the size of direct current to be supplied is set to a time after a predetermined time from a beginning of the operation of a doffing device (spool changing device) 13 (partially shown in Fig. 3).
  • the small direct current is supplied to the single spindle driving motor 6 at the time of a stop for coupling thread accompanied with a broken-state of thread. That is, the same control of the single spindle driving motor 6 is conducted at the time of the thread coupling stop and at the time of the doffing stop except for the point that a supply current is made larger for a predetermined period of time at the time of pulling out the bobbin.
  • Each of the spindle control devices 7 is provided with an inverter 14 and a control circuit 15 provided with a CPU.
  • the control circuit 15 is capable of communicating with the frame control device 9 through the serial interface (not shown), and can receive a command signal from the frame control device 9 and also transmit data to the frame control device 9.
  • the spinning conditions such as the fiber material, the spinning count, and the number of twists are input to the frame control device 9 by the input device 12.
  • the CPU 10 of the frame control device 9 controls the draft motor 3 to a predetermined rotational speed through the inverter 4 based on the input spinning conditions, and also outputs a speed command signal to the respective spindle control devices 7.
  • the spindle control devices 7 control the respective single spindle driving motors 6 to a predetermined rotational speed corresponding to the command signal from the frame control device 9.
  • a predetermined stop operation is performed.
  • a full bobbin (full spool of thread) F mounted onto the spindle 5 is formed with a sloping thread 16, a thread end Yb is wound around a thread end winding portion 17 with a predetermined number of times for winding, and the operation of the frame is stopped in a state that a traveler 19 on a ring rail 18 is positioned above the thread end winding portion 17.
  • a doffing operation by the doffing device 13 is started.
  • the doffing device 13 pulls the full bobbin F out of the spindle 5, and then, mounts the spindle 5 with an empty bobbin.
  • the thread ranging from the thread end winding portion 17 to the full bobbin F is brought into a press-contact with a known cutter (not shown) mounted above the thread end winding portion 17 to be cut.
  • a signal notifying the start is output to the respective spindle control devices 7 from the frame control device 9, and the respective spindle control devices 7 confirm the start time of the doffing.
  • the respective spindle control devices 7 count the lapse time from the start time of the doffing with a counter (not shown) and keeps the timing of pulling out the full bobbin F under control.
  • Fig. 1 is a graph showing a change in time of a volume of a current supplied to the single spindle driving motor 6 during the period of from the frame stop operation to the doffing operation.
  • the supply current to the single spindle driving motor 6 is reduced to decelerate.
  • a direct current D1 having a predetermined volume is supplied to the single spindle driving motor 6 for a predetermined period of time in order to conduct a braking operation.
  • a direct current D2 smaller than the direct current D1 is supplied to the single spindle driving motor 6.
  • a direct current D3 larger than both the direct current D1 and the direct current D2 is supplied to the single spindle driving motor 6 for a predetermined period of time. Thereafter, the small direct current D2 is supplied again, and this state is held until the time of restarting of the frame.
  • the full bobbin F is formed with the sloping thread 16 in pulling out of the full bobbin F as shown in Fig. 3, a torque for rotating in a rotational direction in spinning acts on the spindle 5 through the sloping thread 16.
  • a torque for rotating in a rotational direction in spinning acts on the spindle 5 through the sloping thread 16.
  • the spindle 5 is rotated by the torque described above, and a thread Y ranging through the traveler 19 to a draft part (not shown) is wound around the spindle 5.
  • the position of the traveler 19 changes, or the tension of the thread Y increases.
  • the broken-state of thread is easy to occur at the time of restarting of the frame.
  • the single spindle driving motor 6 is supplied with the direct current D3 to stop the rotation of the spindle 5.
  • the small direct current D2 is supplied to the single spindle driving motor 6 during the stop.
  • This embodiment provides the following effects.
  • the present invention is not limited to the embodiment described above.
  • the following embodiment may be adopted.
  • the period in which the large direct current D3 is supplied to the single spindle driving motor 6 may be set as the period from the start of the doffing operation to the completion of the doffing operation in order to give a large holding force at the time of pulling out the full bobbin F.
  • the supply of the direct current D3 is started by a doffing start signal, and the supply of the direct current D3 is stopped by a doffing completion signal.
  • the counter is unnecessary, which leads to the simple structure.
  • the direct current D3 may be supplied in accordance with the timing that the doffing device 13 pulls out the full bobbin F.
  • the single spindle driving motor 6 may be slightly rotated in an opposite direction to that in the spinning operation instead of supplying the single spindle driving motor 6 with the direct current D3 to hold the spindle 5 in the stop state.
  • a step operation is conducted by the single spindle driving motor 6 in accordance with the command from the doffing device 13 for the operation of pulling out the full bobbin to slightly rotate the spindle 5 (for example, approximately 30 to 60°).
  • the SR motor can be easily controlled so as to conduct the step operation.
  • the force against the torque for rotating the spindle 5 by the thread tension is larger in the case where the single spindle driving motor 6 is rotated in the opposite direction in comparison with the case where a stator is excited so as to stop the spindle 5 at a predetermined position. Therefore, particularly in the case where a large force is required for cutting the thread Y as in the case of a thread with a thick count, the action against the torque for rotating the spindle 5 by the thread tension increases, and also the spindle 5 rotates in a state that the cutter equipped to the spindle 5 abuts against the thread Y. Thus, cutting of the thread Y is smoothly carried out.
  • the case where the spindle 5 is slightly rotated or the case where the direct current D3 is supplied to hold the spindle 5 in the stop state may be selected in accordance with a thickness of a spinning thread.
  • inversion control is conducted when the spinning thread has a predetermined thickness or more, and control is conducted so as to supply the direct current D3 when the spinning thread has a thickness thinner than the predetermined thickness.
  • the inversion control is conducted only in case of the thread with a thick count, in which cutting of the thread is difficult to be smoothly carried out.
  • the structure in which all the single spindle driving motors 6 are driven and controlled by one inverter or the structure in which the single spindle driving motors 6 are divided into a plurality of groups and one inverter is provided in each of the groups may be adopted. In this case, the number of inverters is reduced, and the manufacturing cost is reduced.
  • a synchronous reactance motor a permanent-magnet synchronization motor, a step motor or the like may be used instead of the SR motor.
  • the chopper circuit 8 may be omitted.
  • the present invention is not limited to the ring spinner and may be applied to a ring throwing machine for driving a single spindle, and the like.
  • the single spindle driving motor is controlled with one power supply without providing the changeover switch, whereby the spindle can be prevented from being rotated to such an extent that the trouble occurs at the time of restarting due to the thread tension in doffing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP20010121715 2000-09-18 2001-09-17 Method of controlling single spindle driving motors of a spinning machine Expired - Lifetime EP1188849B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000281704A JP3591438B2 (ja) 2000-09-18 2000-09-18 紡機の単錘駆動モータの制御方法
JP2000281704 2000-09-18

Publications (3)

Publication Number Publication Date
EP1188849A2 EP1188849A2 (en) 2002-03-20
EP1188849A3 EP1188849A3 (en) 2002-11-06
EP1188849B1 true EP1188849B1 (en) 2006-03-29

Family

ID=18766321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010121715 Expired - Lifetime EP1188849B1 (en) 2000-09-18 2001-09-17 Method of controlling single spindle driving motors of a spinning machine

Country Status (4)

Country Link
EP (1) EP1188849B1 (ja)
JP (1) JP3591438B2 (ja)
CN (1) CN100415966C (ja)
DE (1) DE60118282T2 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100424985C (zh) * 2005-09-23 2008-10-08 山洋电气株式会社 同步电动机的控制装置及其控制方法
CN103668608A (zh) * 2013-12-27 2014-03-26 东华大学 一种低成本电锭驱动监控方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3717749A1 (de) * 1987-05-26 1988-12-15 Zubler Geraetebau Verfahren zur aktiven fadenbruchverhinderung an spinn-, zwirn- und spulmaschinenantrieben sowie deren vollautomatisches ausregeln auf maximale produktionsdrehzahlen
DE3805662A1 (de) * 1988-02-24 1989-09-07 Skf Textilmasch Komponenten Ringspinnmaschine
DE4010376C2 (de) * 1990-03-30 1993-12-09 Kurt Prof Dr Ing Warbinek Antrieb, insbesondere Einzelspindelantrieb für eine Arbeitsstelle einer Ringspinnmaschine
US5906092A (en) * 1996-05-11 1999-05-25 Hattori; Motonobu Spinning machine with spindle motor control system

Also Published As

Publication number Publication date
CN100415966C (zh) 2008-09-03
EP1188849A3 (en) 2002-11-06
JP2002088593A (ja) 2002-03-27
JP3591438B2 (ja) 2004-11-17
EP1188849A2 (en) 2002-03-20
DE60118282T2 (de) 2006-12-07
CN1343802A (zh) 2002-04-10
DE60118282D1 (de) 2006-05-18

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