JPH0551169A - Synchronous operating method during instantaneous power off time in temporary twisting machine - Google Patents

Abstract

PURPOSE:To prevent the turbulence of winding during an instantaneous power off period by supplying the electromotive force of a main motor at the instantaneous off time to an inverter for a traverse motor for regeneration so as to perform the traverse in proportion to the rotating speed of a take-up package even during the instantaneous off period, thereby maintaining the synchronization of winding and traverse of yarn. CONSTITUTION:Between two inverters 21, 22 connected to a common converter, the main motor M1 of a take-up package is rotatory-driven by the inverter 21, and the traverse motor M2 of traverse mechanism is rotatory-driven by the inverter 22. The electromotive force of the main motor M1 at the instantaneous off time is supplied to the inverter 22 from the inverter 21 so as to maintain the synchronization of winding and traverse of yarn even during the instantaneous off time. As a result, the traverse is performed in proportion to the rotating speed of the take-up package even during the instantaneous off period in a temporary twisting machine so as to prevent the turbulence of winding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a false twisting machine in which winding and traversing of a yarn are driven by separate motors, and in particular, winding of the yarn and traverse of the yarn are performed even when the power is interrupted. It relates to a driving method for maintaining the synchronization of.

[0002]

2. Description of the Related Art FIG. 5 shows an example of the layout of a conventional false twisting machine.

The yarn Y drawn from the yarn supplying package 2 supported by the creel stand 1 is introduced through the feed roller 3 into the first twist fixing heater 4 installed along the support column 5. The yarn discharged from the upper end of the first heater 4 changes its course obliquely downward through the guide rollers 7 and 8 above the first heater 4 which can be operated by the elevating rod 6 at the time of yarn hooking, and the balloon accompanying the twisting action. Is introduced into the balloon plate 9 which suppresses The thread exiting the balloon plate 9 is cooled by the cooling device 1.
After passing through 0 and being cooled to a predetermined temperature suitable for twist propagation, it is introduced into the false twisting machine 11 and twisting is performed.

The twist imparted by the false twisting machine 11 propagates to the yarn in the first heater 4 and the twist is fixed. Furthermore,
The yarn that has passed through the false twisting machine 11 is introduced into the second torque eliminating heater 12 in some cases, and then wound into the winding package 13 as a false twisting processed yarn. Reference numeral 14 is a drive roller of the winding package 13, and 15 is a feed screw shaft for reciprocating a traverse cam of a traverse mechanism, both of which are rotationally driven in synchronization.

[0005]

However, in the case where the yarn winding and the yarn traverse in the above belt type false twisting machine are driven by different motors, that is, the drive roller 14 of the winding package 13 is used. When the main motor M1 and the feed screw shaft 15 of the traverse mechanism are rotationally driven by the traverse motor M2, the rotations of the two may be out of synchronization. As one of them, there is a case where power supply to both motors is momentarily cut off (within about 1 second) due to some reason.

When the instantaneous interruption occurs, the rotation of the feed screw shaft 15 of the traverse mechanism stops relatively early, but the rotation of the drive roller 14 of the winding package 13 causes the winding package 13 to be placed thereon. And has a large inertia,
After that, it continues to rotate and does not stop immediately. For this reason, traverse is not performed in the middle of the momentary interruption period, the synchronization between the winding of the yarn and the traverse of the yarn is completely lost, the winding traverse angle and the number of winds are disturbed, and the winding is not uniform.

An object of the present invention is to solve the above problems in the false twisting machine, to traverse in proportion to the rotation speed of the winding package even during the instantaneous interruption period, and to prevent the winding disorder.

[0008]

SUMMARY OF THE INVENTION A synchronous operation method of a false twisting machine according to the present invention at the time of instantaneous interruption of power supply is a first inverter of two inverters connected to a common converter, which is a main motor of a winding package. It is driven to rotate, and the traverse motor of the traverse mechanism is driven to rotate by the second inverter,
The electromotive force generated in the main motor at the time of momentary interruption is regenerated from the first inverter to the second inverter to maintain the synchronization between the winding of the yarn and the traverse of the yarn.

[0009]

When a momentary interruption occurs, the traverse motor tries to stop its rotation relatively early because the inertia of the traverse mechanism is small, but the main motor has a large inertia due to the presence of the winding package. , It continues to rotate after that, and does not stop immediately after a momentary interruption. Therefore, the main motor acts as a generator, and the electromotive force of the main motor urges the second inverter via the first inverter to continue the rotation of the traverse motor. Therefore, since the traverse mechanism performs the traverse motion according to the winding speed of the package, the winding traverse angle and the number of winds are not disturbed at the time of a momentary interruption.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, M1 is a winding package 13.
Main motor for rotating the drive roller 14 of
Reference numeral 2 denotes a traverse motor that rotationally drives the feed screw shaft 15 of the traverse mechanism, each of which comprises a three-phase induction motor. The main motor M1 and the traverse motor M2 are driven at predetermined rotation speeds by the inverter devices 21 and 22, respectively, and are brought to predetermined rotation speeds by feedback signals of the actual speeds detected by the rotation speed sensors 23 and 24 composed of pulse generators. Stabilized controlled. Both the inverter devices 21 and 22 are connected to the power source bus 16 via the line 17 and the electromagnetic switch MC, and are connected to the control power source via the line 19, the regulator 20 and the line 18 for the control system. This control system power line 1
Reference numeral 8 is connected to the power source bus 16 via the uninterruptible power supply UPS.

M4 is an edge control motor for so-called ear scraping of the package, and the power bus 1
The rotation is controlled via the uninterruptible power supply UPS and the servo driver 25 connected to the control unit 6. CB is a circuit breaker.

FIG. 2 shows the configuration of the inverter devices 21 and 22. One inverter device 21 is composed of a converter (forward conversion device) 26 and an inverter 27 connected thereto, and the other inverter device 22 is the converter 2 described above.
6 and an inverter 28 connected via terminals P and N. Both inverters 27 and 28 are, as shown in FIG.
Switch element S1 consisting of a switching transistor
It is composed of S6 and feedback diodes D1 to D6 for transistor protection which are connected in antiparallel to the S6, and the reactive power of the inductive load can be fed back to the power source. The inverters 27 and 28 are a CPU, which is a main component of a control device (not shown), and a PWM controlled by the CPU.
The phase is controlled via the base drive circuits 29 and 30 by the pulse width signal created by the circuit. In this embodiment, transistors are used as the switch elements S1 to S6, but this is not an essential matter of the present invention, and it is an inverter using a self-turn-off type element such as GTO or other thyristor switch element. You may.

Next, the operation of the above configuration will be described.

In a normal state without instantaneous interruption, the inverter 2
The main motor M1 receives a three-phase alternating current of a predetermined frequency from 1, 2 and 22.
And the traverse motor M2, and the respective reactive powers are fed back to the feedback diodes D1 to D1 in the inverters 27 and 28.
It is fed back to the power source side via D6 and the converter 26.

If there is a momentary interruption in the line 17 or the power source bus 16 in FIG. 1, the power supply from the inverter devices 21, 22 to the main motor M1 and the traverse motor M2 is stopped. However, the control system lines 18 and 19 of the inverters 27 and 28 and the edge control motor M4 remain activated by the action of the uninterruptible power supply UPS.

Among the main motor M1 and the traverse motor M2 whose power supply is stopped, the traverse motor M2 tries to stop its rotation relatively early because the inertia of the traverse mechanism is small, but the rotation of the main motor M1, that is, the driving roller 14 is stopped. The rotation continues and does not stop immediately because of the large inertia caused by the presence of the winding package 13 placed on the rotation package 13 and the like. Therefore, during the momentary interruption period, the main motor M1 acts as a generator until its rotor stops rotating, and its electromotive force passes through the feedback diodes D1 to D6 of the inverter 27 to the line 31.
Appears as a DC voltage on the side. This DC voltage is line 3
The inverter 28 is energized via 2 to maintain the function of the inverter 28, so that the traverse motor M2 continues to rotate. FIG. 4 shows the motor M1, before and after the instantaneous interruption.
It shows an example of changes in the rotation speeds of M2 and M4. The rotation speed of the main motor M1 gradually decreases at the same time when the instantaneous interruption occurs, and the rotation speed rises again after the power supply is restored. During this momentary interruption period, the traverse motor M2 continues to rotate at a corresponding speed based on the supply of regenerative electric power according to the rotation speed of the main motor M1.
Therefore, since the traverse mechanism performs the traverse motion according to the winding speed of the package, the winding winding angle and the winding number are not disturbed. Since the edge control motor M4 is rotated by the uninterruptible power supply UPS even if the above-mentioned instantaneous interruption occurs, so-called ear scraping of the package is performed before and after the instantaneous electricity application.

[0018]

As described above, according to the synchronous operation method of the false twisting machine of the present invention at the time of momentary interruption of power supply, the electromotive force of the main motor at the moment of momentary interruption is regenerated to the inverter for the traverse motor to cause momentary interruption. Since the traverse is performed in proportion to the rotation speed of the winding package during the period and the synchronization between the yarn winding and the yarn traverse is maintained, it is possible to prevent the disorder of the winding during the momentary interruption period. You can

[Brief description of drawings]

FIG. 1 is a diagram showing an electric circuit of a false twisting machine according to an embodiment of the method of the present invention.

FIG. 2 is a block diagram showing a configuration of an inverter device in FIG.

FIG. 3 is a diagram showing a configuration of an inverter in FIG.

FIG. 4 is an operation explanatory diagram at the time of instantaneous interruption by the method of the present invention.

FIG. 5 is a diagram showing a layout of a conventionally known false twisting machine.

[Explanation of symbols]

 1 Creel Stand 2 Yarn Supply Package 3 Feed Roller 4 First Heater for Twisting Fixing 5 Struts 6 Elevating Rod 7, 8 Guide Roller 9 Balloon Plate 10 Cooling Device 11 False Twisting Machine 12 Second Heater for Eliminating Torque 13 Winding Package 14 Winding Drive package drive roller 15 Traverse mechanism feed screw shaft 16 Power supply busbar 17 Line 18 Control system power supply line 19 Line 21,22 Inverter device 23,24 Rotation speed sensor 25 Servo driver 26 Converter 27 Inverter 27,28 Inverter 29,30 base Drive circuit 31, 32 lines Y thread M1 main motor M2 traverse motor UPS uninterruptible power supply CB circuit breaker S1 to S6 switch element D1 to D6 feedback diode

Claims (1)

[Claims] 1. Out of two inverters connected to a common converter, a first inverter rotationally drives a main motor of a winding package, and a second inverter rotationally drives a traverse motor of a traverse mechanism to cause instantaneous interruption. Occasionally, the electromotive force generated by the main motor is regenerated from the first inverter to the second inverter to maintain the synchronization between the winding of the yarn and the traverse of the yarn. Time synchronous operation method.