WO2003056695A1 - Appareil de regulation de la tension de cordes - Google Patents

Appareil de regulation de la tension de cordes Download PDF

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Publication number
WO2003056695A1
WO2003056695A1 PCT/JP2002/013204 JP0213204W WO03056695A1 WO 2003056695 A1 WO2003056695 A1 WO 2003056695A1 JP 0213204 W JP0213204 W JP 0213204W WO 03056695 A1 WO03056695 A1 WO 03056695A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
motor
voltage
constant current
constant
Prior art date
Application number
PCT/JP2002/013204
Other languages
English (en)
Japanese (ja)
Inventor
Guo-Hua Wang
Yasushi Kurita
Original Assignee
Nitta Corporation
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 Nitta Corporation filed Critical Nitta Corporation
Publication of WO2003056695A1 publication Critical patent/WO2003056695A1/fr
Priority to HK05107321A priority Critical patent/HK1075138A1/xx

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40—Applications of tension indicators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/10—Ensuring correct operation
    • B65H2601/12—Compensating; Taking-up

Definitions

  • the present invention relates to a tension control device for cords for applying a constant tension to cords such as a yarn, a ribbon, a belt, and an electric wire.
  • Cord tension control devices are used in winding machines that take up cords, and enable cords to be wound with a constant tension.
  • the tension control device includes a tension pulley 11 and a motor M that is provided coaxially with the tension pulley 11 and rotates with it.
  • the motor M When the cords 12 run, the motor M is rotated through the tension pulley 11, and tension is applied to the cords 12 by the torque generated in the motor M.
  • a back electromotive voltage is generated.
  • this back electromotive voltage is input to the constant current circuit built into the motor M, the torque becomes constant irrespective of the rotation speed of the motor, and a constant tension can be applied (Japanese Patent Laid-Open No. 113252/203). Gazette, JP-A-11-301927).
  • the above-described tension control device for cords has a problem that the constant current circuit cannot maintain a constant current when the feeding speed of the cords decreases and as a result, the rotation speed of the motor decreases.
  • the constant current circuit generally uses the principle that the collector current of a transistor is constant regardless of the fluctuation of the collector-emitter voltage (or the collector-base voltage). There is a minimum required collector-emitter voltage (or collector-base voltage) to pass a constant collector current.
  • an object of the present invention is to realize a tension control device for cords capable of controlling the tension to be constant irrespective of the rotation speed of a motor.
  • Another object of the present invention is to realize a cord-type tension control device capable of recovering electric power generated by rotation of a motor.
  • a tension control device for cords includes a motor that generates a back electromotive voltage in accordance with a rotation speed, and a constant current circuit connected to the motor, wherein the constant current circuit is connected to the motor. , A voltage circuit for applying a forward bias voltage is inserted. According to this configuration, even if the rotation speed of the motor decreases and the output voltage decreases, the forward bias voltage generated in the voltage circuit is applied to the constant current circuit at least. Therefore, stationary operation of the constant current circuit during lowering rotational speed of the motor is no longer a constant current is secured, the tension of the cords is always controlled to a fixed 0
  • the voltage circuit compensates for a decrease in the forward voltage of the diode in the rectifier circuit. Can be.
  • one voltage circuit can support a plurality of motors. it can.
  • a power regenerating circuit for flowing a motor current to a load on condition that a back electromotive voltage of the motor exceeds a threshold value.
  • This power regeneration circuit regenerates the electric power generated by the motor when the motor's rotational speed is high, making it possible to effectively use the energy previously lost as heat.
  • a tension control device for cords of the present invention includes: a motor that generates a back electromotive voltage in accordance with a rotation speed; a constant current circuit connected to the motor; A power regeneration circuit for supplying a current to a load may be provided on condition that the current exceeds a threshold value. This power regeneration circuit regenerates the electric power generated from the motor at high speeds so that the electric power can be used effectively.
  • the tension can be controlled to be constant even when the motor rotates at a high speed with a simple configuration in which a voltage circuit is simply inserted. Also, by recovering the electric power generated by the high rotation of the motor, effective use of electric power can be achieved.
  • FIG. 1 is a circuit diagram showing an example of the tension control device of the present invention.
  • FIG. 2 is a circuit diagram showing an example of a tension control device for cords in which a plurality of brushless motors ⁇ ⁇ are connected in series.
  • FIG. 3 is a circuit diagram when the present invention is applied not only to a brushless motor, but also to a motor with a brush ⁇ '.
  • FIG. 4 is a perspective view of the tension control device.
  • FIG. 1 is a circuit diagram showing an example of the tension control device of the present invention.
  • the tension controller 1 rectifies the output voltage of the three-phase brushless motor (hereinafter referred to as “brushless motor”) ⁇ by the rectifier circuit 2 and supplies the rectified output to the constant current circuit 3.
  • the rectifier circuit 2 and the constant current circuit 3 may be mounted on the internal substrate of the brushless motor ⁇ ⁇ and rotate with the motor rotation shaft, or may be externally attached to the brushless motor ⁇ . In Fig. 1, the explanation will be made assuming that it is built into the brushless motor ⁇ .
  • the output voltage of the rectifier circuit 2 fluctuates according to the fluctuation of the rotation speed of the brushless motor ⁇ . Therefore, the output voltage of the rectifier circuit 2 is represented by a function E (t) of time “t. It has a constant voltage diode ZD and a resistor R2 for supplying a voltage. Further, a constant voltage circuit 4 is inserted in series with the constant current circuit 3.
  • the circuit configuration of the constant voltage circuit 4 is arbitrary, and a known constant voltage circuit or rechargeable! A pond can be used.
  • the constant voltage circuit 4 cannot be included in the brushless motor M because it is necessary to supply power to the constant voltage circuit 4 from the outside. Therefore, the constant voltage circuit 4 is connected to the external terminals T 1 and T 2 of the brushless motor M (in the figure, the symbol “ ⁇ ” denotes a terminal; the same applies hereinafter).
  • the voltage of the constant voltage circuit 4 is called a bias voltage E0.
  • the bias voltage E0 is a constant value that does not fluctuate over time.
  • the self-constant current transistor Q1 is always in a constant state because a constant voltage is supplied to the base by the constant voltage diode ZD.
  • the voltage applied between the collector and the emitter of the constant current transistor Q1 has a constant voltage circuit 4 even if the rotation speed of the brushless motor M decreases and the voltage E (t) decreases to 0. Therefore, the minimum bias voltage E0 is secured. Therefore, if the value of the bias voltage E0 is selected to be equal to or higher than the minimum voltage at which a constant collector current can flow through the constant current transistor Q1, a constant current can always flow through the brushless motor M. Therefore, the rotational torque of the brushless motor M can be controlled to be constant even at low rotation.
  • a plurality of brushless models M1, M2,..., Mn are used. In the embodiment of the present invention, only one constant current circuit 3 and one constant voltage circuit 4 are required to be installed (therefore, each of the brushless motors M1, M2,..., Mn includes a constant current circuit inside). ⁇ No type).
  • FIG. 2 is a circuit diagram of a cord type tension control device 1 using a plurality of brushless motors M 1, M 2,..., Mn.
  • Each rectifier circuit 21, 22, ..., 2n is connected to each brushless model M1, ⁇ 2, ..., Mn, and the output terminal of each rectifier circuit 21, 22, ..., 2n T
  • the constant current circuit 3, the power regeneration circuit 5, and the constant voltage circuit 4 are connected in series.
  • the sum of the output voltages of the rectifier circuits 21, 22,..., 2 ⁇ and the constant voltage circuit 4 is written as ⁇ 0 + E (t).
  • the reference point of the voltage 0 is the negative terminal b of the constant voltage circuit 4.
  • the output voltage E0 + E (t) is applied to the constant current circuit 3 and the power regeneration circuit 5 connected in series.
  • the function of the constant current circuit 3 and the function of the constant voltage circuit 4 are to supply a constant current to each of the brushless motors M1, M2,..., Mn, as described with reference to FIG.
  • the power regeneration circuit 5 is a circuit for supplying power to the load ZL and storing energy in the capacitor C when the rotation speed of the brushless motors M1, ⁇ 2,..., Mn is relatively high.
  • the power regeneration circuit 5 includes a switching transistor Q2, and a serially connected diode D and a capacitor C are connected in parallel with the switching transistor Q2.
  • the load ZL is connected to the capacitor C.
  • the type of the load ZL is arbitrary (for example, the load ZL may be a lighting fixture).
  • a signal from the control circuit 6 is supplied to the gate of the switching transistor Q2.
  • the control circuit 6 turns off the switching transistor if the voltage E0 + E (t) exceeds the threshold based on the output voltage E0 + E (t) of the brushless motor M and the constant voltage circuit 4, and If the threshold is not exceeded, control is performed to turn on the switching transistor.
  • the configuration of the control circuit 6 is not limited. For example, a known circuit using a microcomputer can be employed. Explaining the operation of the power regeneration circuit 5 described above, if the rotation speed of the brushless motor M is low and the voltage E0 + E (t) is equal to or less than the threshold value, the switching transistor Q2 is turned on. So current flows through the switching transistor Q2. The resistance of the power regeneration circuit 5 is low, and the power regeneration circuit 5 consumes almost no power. At this time, only the current is supplied to the load ZL from the charge stored in the capacitor C.
  • the rotation speed of brushless mode M is high, and voltage E0 + E (t) exceeds the threshold. Then, the switching transistor Q 2 is turned off, and the current flows through the die D to the load ZL. The resistance of the power regeneration circuit 5 including the load Z becomes equivalently high and consumes the power generated in the brushless motor M. At the same time, it flows to the capacitor C, where energy is stored.
  • the embodiment of the present invention is not limited to the above embodiment.
  • the present invention can be applied not only to the brushless motor M but also to a brushed motor M 'as shown in FIG. In this case, only the rectifier circuit 2 is omitted, and the operations of the other constant current circuits 3 and constant voltage circuits 4 are the same.
  • various changes can be made within the scope of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

L'invention concerne un appareil de régulation de la tension de cordes comprenant un moteur sans balais (M) générateur d'une force contre-électromotrice, un circuit de redressement (2) connecté à un enroulement du moteur sans balais (M), et un circuit de courant constant (3) connecté au circuit de redressement (2). Un circuit de tension (4) donnant le sens direct via la tension est introduit entre le circuit de courant constant (3) et le circuit de redressement (2). Même lorsque la vitesse de rotation du moteur (M) est abaissée et la tension de sortie est diminuée, le sens direct via la tension engendrée par le circuit de tension (4) est tout au moins appliqué au circuit de courant constant (3). Par conséquent, il n'existe pas d'état de non fonctionnement du circuit de courant constant (3), lorsque la vitesse de rotation du moteur (M) est abaissée. Un courant constant peut être garanti et la tension des cordes peut être régulée de manière à être toujours constante.
PCT/JP2002/013204 2001-12-25 2002-12-18 Appareil de regulation de la tension de cordes WO2003056695A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HK05107321A HK1075138A1 (en) 2001-12-25 2005-08-22 Cord tension control apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-391333 2001-12-25
JP2001391333A JP3876160B2 (ja) 2001-12-25 2001-12-25 コード類の張力制御装置

Publications (1)

Publication Number Publication Date
WO2003056695A1 true WO2003056695A1 (fr) 2003-07-10

Family

ID=19188506

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/013204 WO2003056695A1 (fr) 2001-12-25 2002-12-18 Appareil de regulation de la tension de cordes

Country Status (4)

Country Link
JP (1) JP3876160B2 (fr)
CN (1) CN1312836C (fr)
HK (1) HK1075138A1 (fr)
WO (1) WO2003056695A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113460802A (zh) * 2021-05-27 2021-10-01 宜兴市博宇电力机械有限公司 一种新能源张力机及其控制方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11301927A (ja) * 1998-04-23 1999-11-02 Nitta Ind Corp 張力制御装置
JPH11325203A (ja) * 1998-05-19 1999-11-26 Nitta Ind Corp 張力制御装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2334068Y (zh) * 1998-07-02 1999-08-18 温汉静 一种新型声波共鸣仪
CN2460796Y (zh) * 2000-12-28 2001-11-21 达鹰企业有限公司 电线电缆加工机传动皮带张力调整装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11301927A (ja) * 1998-04-23 1999-11-02 Nitta Ind Corp 張力制御装置
JPH11325203A (ja) * 1998-05-19 1999-11-26 Nitta Ind Corp 張力制御装置

Also Published As

Publication number Publication date
HK1075138A1 (en) 2005-12-02
JP3876160B2 (ja) 2007-01-31
JP2003192232A (ja) 2003-07-09
CN1312836C (zh) 2007-04-25
CN1608341A (zh) 2005-04-20

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