JPH04207998A - Textile machine - Google Patents

Abstract

PURPOSE:To considerably improve speed accuracy and also spinning accuracy by feeding the rotating speed of each spindle drive motor back to a corresponding spindle driving inverter. CONSTITUTION:For a spindle drive motor 5, a speed feedback type motor performing speed control by speed feedback is used. An inverter corresponding to each speed feedback motor for spindle drive is automatically controlled in such a manner that its output frequency will coincide with the set frequency. That is, the speed is held to a set point without being affected by the fluctuations in load or power received. The set point is a common speed command input to each inverter 3-n. In this way, the speed accuracy of the spindle driven by a speed feedback type motor is greatly improved oven that for driving by induction motor.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to Link Seibo I! Two people will be represented! The present invention relates to a textile machine, and particularly to a textile machine of an individual drive type, which is equipped with motors for individually driving spindles and inverters corresponding to each of the motors.

[Prior art] Ring spinning machines, which are representative of textile machinery, operate from start to stop between a spindle that winds twisted yarn and a draft roller that supplies and stretches roving before twisting. It is necessary to maintain rotational synchronization. Until recently, both mechanisms were driven by a single motor mechanically connected by a chain, a gear, or a bolt. Recently, however, link spinning machines with an individual drive system, in which individual motors are provided for each spindle and these motors are controlled at variable speeds, have been attracting attention for energy saving and flexible production management.

As a conventional example of the second individual drive type ring spinning machine, there is one described in Japanese Patent Application Laid-Open No. 59-204929.
Figure 5 shows the system configuration of the ``Ashigoyu'' system.

Second, Togoku uses 10 drive motors for each individual spindle.
3, and the draft roller part also has its own drive motor 1.
I have 04. The control device (rotation speed adjustment device) that variable speeds these is 103.104 Work common to both 1 Standing 1
It will be established on 05th. At these working positions, commands are received from the central control device 106 independently of each other, and the drive motor 10
3.Control 104. Further, the DC circuit of the inverter is commonly connected to each working position, and one converter 101 is used to supply power.

[Problem to be solved by invention]However, in this conventional example, the spindle motor drive is
This is oven loop control, and no consideration is given to accurately synchronizing the rotational speeds of the spindle motor and draft roller.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a motor for driving a plurality of spindles individually, and a spindle drive motor corresponding to each of the spindle drive motors. an inverter; a draft roller drive motor that drives a draft roller; a draft roller drive inverter that rotationally controls the draft roller drive motor; and supplies DC power to the spindle drive inverter and the draft roller drive inverter. In a textile machine that can enjoy a converter, the rotational speed of each of the spindle drive motors is fed back to the corresponding spindle drive inverter.

[Operation: The rotational speed of each spindle drive motor is fed back to the corresponding spindle drive inverter. This reduces speed fluctuations due to load-related power reception fluctuations.

C Practical running example Figure 1 shows a concrete example of a practical boat of the present invention. Embodiment 2 in Fig. 1, t + 7; Ri spinning machine: This is representative of the woven fiber 8! Machine: This is what was applied.

Fig. 1: As shown, the rotation of the mechanism part 15 and the mechanism part 15 which drive the second textile loom two heat wheels is controlled! It includes a draft roller mechanism section 16 that rotates in synchronization with the rotation of a mechanism section 15 that drives a spindle motor control section 13, a spindle motor control section 13, and a draft roller mechanism section 16 that rotates at a predetermined ratio. A main side board I4 is provided for giving power and speed commands to the mechanism section 1.

The mechanism section 15 that drives the spindle is configured to drive the spindle and U.
Motor 5 (5-1, 5-
2...).

The spindle motor control unit 13 connects a specific inverter 3 corresponding to each spindle drive motor 5 to 3-1, 3-2,
) and those inverters to switch between operation and stop (speech generation means 12 (+2-4, 12-2...)
・).

F rough j-low → side JEJI (+6:i, I・
Motor 76 that drives rough j-self-go 7 and soi male
Pigeon.

The electric power iFj 1 is converted into direct current power by the converter 2, and is supplied to the spindle drive motor control unit 13 and the draft roller drive inverter 4 through a common DC bus. The draft roller driving inverter 4 converts the output DC power of the converter 2 into a variable frequency power source according to the speed command distributed at a predetermined ratio from the speed command control section 9, and supplies the power to the draft roller driving motor.

The converter 2 has a rectifier 22 that rectifies an AC input into a DC, and a chopper control unit 23 that converts the output into a constant low voltage DC through voltage control.

Then, the speed command from the speed setting device 8 is manually inputted, and the speed command control unit 9 sets a predetermined ratio to the spindle inverter 3 and the draft roller inverter 4.
b. The speed commands bsP and bIl are output, and the spindle drive motor and draft roller drive motor are operated synchronously at the rotation speed based on this predetermined ratio;
The roving is rolled and wound, or spun.

Spindle driving motor 5: A speed feedback type motor is employed that performs speed-based control based on speed feedback. The inverters corresponding to the speed feedback type motors for driving the spindle are automatically controlled so that the frequency of their output matches the set frequency. In other words, the speed is maintained at the set value without being affected by load or power reception fluctuations. The set value is a common speed command input to each inverter 3-n. In this way, the speed accuracy of the spindle driven by the speed feedback type motor is significantly improved compared to driving by a conventional induction motor.

For example, a brushless DC motor could be used as the speed feedback motor. An example of a brushless DC motor will be explained below.

The brushless DC motor changes the output voltage phase of the inverter combined with it to the rotor 1 of the brushless DC motor.
It is controlled to output according to the position of 11. The alignment of the rotor magnetic poles of the brushless DC motor 5-n is as follows:
1 and 2 can be obtained by detecting the induced voltage waveform during the non-current period of the output voltage of the converter. Since this detection method does not require an extra detector, it is possible to further downsize the electrical production.

As a method of detecting the position of the rotor magnetic pole of a song, a detection-only winding v
A is provided on the stator side, and magnetic Fi! is determined from the voltage waveform induced in the winding by the movement of the rotor magnetic poles. There are methods such as detecting the device and using an encoder for detecting the magnetic pole position.

FIG. 2 describes the inverter's oB.

These can be roughly divided into the 32-n inverter section and the 33-n inverter section.
It is divided into 36-n control units.

The inverter section (output element section) 32-n generates direct current from the terminal PN and outputs it as three-phase alternating current to the terminals U V W. The capacitor 31-n is located in the power section of the inverter 3-n, and smoothes the direct current like the capacitor 21, but since the capacitor 31-n is distributed and connected to a common DC bus over the entire length of the machine, the converter 2 from inverter 3
-N voltage drop can be kept small. Also, the speed command 1 word 1) S3 is manually input to the speed control circuit 35-n and pHv\] occurs times m: 3-! -n, *\- is outputted to the inverter unit 32-n through the drive circuit 33-n.

Speed control circuit 3 ry -n,..., -s drive circuit 833
-n is the signal f of the switching signal generating means 12-n (the gradient operation and non-operation are controlled).

In this inverter, the inverter section 32-n or the control section 33-n-36-n can be integrated into an integrated circuit by using a constant voltage DC circuit for the human-powered DC voltage of the inverter. Furthermore, by using a low voltage DC circuit, the insulation distance and component ratings can be reduced, and in combination with integrated circuits, it is possible to significantly downsize the inverter. The distributed inverter 3-n, which is composed of an inverter section 32-n and control sections 33-n to 36-n, is connected to the converter 2 through a common DC bus that is controlled to a constant low voltage by a converter circuit. be done. Lowering the voltage as shown in item 2 makes it possible to make each inverter more compact, as well as making it possible to make the entire iUsui machine smaller.

3. FL/SDC motor: Well, in principle, the torque-current ratio is excellent, and in order to achieve the same output and the same torque (same acceleration characteristics), the current or inverter copying amount can be reduced. It is possible to keep it small. In other words, by distributing the individual inverter parts, the necessary downsizing is easy.
It is two things.

According to the second embodiment, speed accuracy can be improved;
By integrating the inverter into an integrated circuit, making it easier to conduct wiring with diagonal insulation distances, etc., there is an effect that the textile II machine can be significantly downsized.

FIG. 3 shows another embodiment. Differences from the embodiment shown in the figure include an inverter 10 for sudden acceleration/deceleration operation for sudden stopping (sudden deceleration) of a single spindle; 11. Cut-off means for switching from to inverter lO. and this switching means 1
1 and 2, which is provided with a switching signal generating means 17 that commands the start and cut-off control of the output of the inverter 3 and the inverter 10 in conjunction with the inverter 3 and the inverter 10. Inverter 10 is connected to the DC output bus of converter 2 and is supplied with power.

In addition, the speed command 1 word bsF of the speed command controller 9 is also input manually to the inverter 10, and the output of the inverter 10 is controlled. The output of the hearter 10 is controlled by the signal e from the switching 1 word generating means 17 to start or cut off, and is sent to the switching means 11 through the output line i (I) of the Hague 10.

Now, suppose that yarn breakage occurs on spindle 5-n during spinning due to the same cause. The control time chart for the second time is the fourth one.
As shown in the figure. When thread breakage occurs, a command from the control device 20 that controls the switching means 11-n connected to the spindle and the switching signal generating means 17-n which are interlocked with each other when thread breakage occurs; This switches to the adjustment/subtraction inverter 10 side. The switching means 11 is connected to the main circuit U, ~°,
Switch W. Further, the switching signal generating means 17 performs one step of switching the output cutoff control of the inverter. When the signal e from the switching signal generating means 17 of the inverter 10 is input, the control circuit of the inverter IO, which had been operating internally so as to output the frequency corresponding to the speed command bsp, changes to ■, ", v , the output voltage phase of the inverter 10 is aligned with the position of the rotor magnetic pole detected from the induced voltage of the W phase, and output is started, the motor is electrically connected, and then stopped by rapid deceleration. After that, the spindle is re-accelerated.The second re-acceleration is performed while the trut roller is in steady operation, so it must be started up with rapid acceleration to avoid thread breakage.

After the thread breakage is repaired, when the yarn is rapidly accelerated by the inverter 10 and the original speed is reached again, the switching means 11-n and the switching signal generating means 17-0 are switched to the spindle drive A> Hague 3-n side. Switching signal generation means 17 to inverter 3-n
-n signal f is input manually, the control circuit of inverter 3-n, which had been operating internally to output the frequency corresponding to the speed command b3p, changes from the induced voltage of the U, V, and W phases. Inverter 3-n is placed at the position of the detected rotor magnetic pole.
Start output after matching the output voltage phase.

Since the phase of the inverter output voltage is adjusted based on the detection of the magnetic pole position in this manner, a large transient current does not flow, and switching can be performed reliably.

In this way, it is possible to completely return to the operating condition before the yarn breakage. In addition, inverter I 08. The capacity must be sufficient to accelerate and decelerate a motor with a weight of t.

Second embodiment: In addition to improving the speed accuracy of the strands, an inverter for sudden acceleration/deceleration is installed.Second: It is easy to switch when the strand breaks, and furthermore, it is possible to suppress the increase in the capacity of individual inverters. In other words, an inverter for sudden acceleration/deceleration or a receiver has a function for sudden acceleration/deceleration, but an individual inverter does not need sudden acceleration/deceleration, and the capacity for steady operation is sufficient. Since only one unit is required to increase the capacity, only the inverter for accelerating speed is sufficient. Since the number of individual inverters is large, it has a great effect in suppressing capacity increase.

The small size of the individual inverter, as shown in Figure 2, makes it possible to use the free space in the structure of each spinning machine and install it in a distributed manner on individual inverters, which greatly reduces the size of the spinning machine system. There is an effect that can be achieved.

In the above practical example, the description has been made using a Burrne DC motor as a speed feedback type motor, but it can be similarly used with an operation f-3 ton 2 using torque control of an induction motor diagram.

[Effects of the Invention] According to the present invention, the speed accuracy is greatly improved by two points, and the spinning accuracy can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention. FIG. 2 is a configuration diagram of an individual inverter according to an embodiment of the present invention. FIG. 3 shows a system I! according to another embodiment of the present invention. It is a complete drawing. FIG. 4 is an operation time chart of FIG. 3. FIG. 5 is a configuration diagram showing a conventional example. Explanation of symbols l...Electric power source, 2...Converter, 3...Inverter for driving spindle, 4...Inverter for driving draft roller, 5...Motor for driving spindle, 6...Draft roller Drive motor, 7...
draft roller, 8...speed setting section, 9...speed command control section, 10...inverter for adjustment/subtraction, 11...switching means, 12.17... switching signal generating means, 13. ...Spindle drive motor control section, I
4... Main control panel, 15... Spindle drive mechanism section, 16... Draft roller mechanism section, 18...
Subicitor drive motor control section, 19... Main control panel, Fig. 2 UVW f 3I-force

Claims (1)

[Claims] 1. A spindle drive motor that drives a plurality of spindles individually, a spindle drive inverter corresponding to each of the spindle drive motors, and a draft roller drive motor that drives a draft roller. , a textile machine comprising: a draft roller drive inverter that rotationally controls the draft roller drive motor; and a converter that supplies DC power to the spindle drive inverter and the draft roller drive inverter; A textile machine characterized in that the rotational speed of the textile machine is configured to be fed back to the corresponding spindle drive inverter. 2. The textile machine according to claim 1, wherein the spindle driving motor is a speed feedback type motor. 3. The speed feedback type motor is a brushless D
3. The textile machine according to claim 2, wherein the textile machine is a C motor. 4. The textile machine according to claim 1, wherein the converter has voltage control means, and the DC output voltage of the converter is controlled to a constant low voltage. 5. The textile machine according to claim 4, wherein the inverter is composed of an inverter section and a control section, and at least one of them is composed of an integrated circuit. 6. A spindle drive motor that drives a plurality of spindles individually; a spindle drive inverter corresponding to each of the spindle drive motors; a draft roller drive motor that drives a draft roller; and a draft roller drive motor that drives a draft roller. A textile machine comprising: a draft roller drive inverter that controls the rotation of a motor; and a converter that supplies DC power to the spindle drive inverter and the draft roller drive inverter, wherein at least two of the plurality of individual spindle drive inverters A textile machine characterized by comprising: a common rapid acceleration/deceleration inverter; and means for switching and connecting the spindle drive motor to the rapid acceleration/deceleration common inverter or the individual spindle drive inverter. 7. The spindle drive motor is a speed feedback type motor configured to feed back the rotational speed of the spindle drive motor to the corresponding individual spindle drive inverter. The mentioned textile machinery. 8. The speed feedback type motor is a brushless D
The textile machine according to claim 7, characterized in that it is a C motor.