JP2002054032A - Motor-driving system in single spindle-driving type textile machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor-driving system in a single spindle-driving type textile machine, capable of reducing a wiring man-hour and a wiring cost over plural spindles by reducing the number of transmitting lines for transmitting each command signal to each driver. SOLUTION: This motor-driving system in the single spindle-driving type textile machine has plural drivers 30 for individually controlling the driving motors 2 installed in each spindle, and a signal-setting tool 50 connected to the plural drivers 30 through a common command signal-transmitting line 40. The signal-setting tool 50 creates a revolution speed-directing signal in a frequency corresponding to the target revolution speed of each of the driving motors 2, and a parameter-directing signal for showing the parameter for setting a driving condition, and has means for transmitting each of the directive signals through the common command signal-transmitting line 40 to each of the drivers 30. Each of the drivers 30 can recognize the received revolution speed-directing signal and the parameter-directing signal by distinguishing them from each other, and controls each of the driving motors 2 based on the recognition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single spindle drive type textile machine, and more particularly to a motor drive system for individually controlling a drive motor provided for each spindle.

[0002]

2. Description of the Related Art Conventionally, there has been known a single spindle drive type textile machine provided with a dedicated drive motor for each of a plurality of spindles, for example, a single spindle drive type multiple twisting machine. In this twisting machine, each drive motor is individually controlled by a plurality of motor drivers provided for each weight or a plurality of weights.

In the twisting machine having such a configuration, since the rotation speed (number of revolutions) of each drive motor affects the quality of the twisted yarn between the weights, it is necessary to control the rotation of the drive motor between the weights without variation. Have been. Therefore, in the twisting machine, a rotation speed command signal for controlling each drive motor to a target rotation speed, a parameter command signal for setting operating conditions, and a drive / stop command for driving / stopping each drive motor are provided. The signal is transmitted to each motor driver independently of the signal. This rotation speed command signal is transmitted from the signal setting device to each driver via a rotation speed transmission line. The parameter command signal is transmitted from the signal setting device to each motor driver via a serial transmission line,
The drive / stop signal is also transmitted from the signal setting device to each motor driver via a drive transmission line.

[0004] Each of these motor drivers accurately monitors the rotational speed of each drive motor, and based on each command signal transmitted from the signal setting device via the three transmission lines, each of the drive motors. The rotation is optimally controlled.

[0005]

Each command signal transmitted by the signal setting device as described above is transmitted to each motor driver via three transmission lines. For this reason, in a single-spindle drive type multiple twisting machine including a plurality of weights, 3
There is a problem in that the number of transmission lines must be wired, which increases the wiring man-hour and the wiring cost.

Accordingly, the present invention is directed to a single-spindle-drive type textile machine capable of reducing wiring man-hours and wiring costs over a plurality of spindles by reducing the number of transmission lines for transmitting each command signal to each driver. It is an object of the present invention to provide a motor drive system.

[0007]

According to a first aspect of the present invention, there is provided a motor driving system which includes a plurality of drivers for individually controlling a driving motor provided for each weight, and a common driver for the plurality of drivers. In a motor drive system of a single spindle drive type textile machine having a setting device connected via a command signal transmission line, the setting device has a rotation speed command signal having a frequency corresponding to a target rotation speed of each of the drive motors. And a parameter command signal indicating a parameter for setting an operating condition, and a means for transmitting each command signal to each of the drivers via the common command signal transmission line in a different signal form, Each driver discriminates and recognizes the rotation speed command signal and the parameter command signal received from the setting device, and controls each of the drive motors based on the recognition result. It is intended. According to the first aspect, since the rotation command signal and the parameter command signal are separately transmitted to each driver while being shared by a common command signal transmission line, there is no need to provide a special transmission line for transmitting the parameter command signal. .

[0008] The motor drive system according to claim 2 is
2. The device according to claim 1, wherein the setting unit transmits the parameter command signal to each of the drivers during a non-transmission period of the rotation speed command signal. According to the second aspect, the parameter command signal is transmitted to each driver during the non-transmission period of the rotation speed command signal, so that the operating conditions can be set for each driver without affecting the rotation of each drive motor.

The motor drive system according to claim 3 is
3. The power line according to claim 1, wherein a power line commonly connected to the plurality of drivers and each command signal of the setting device are superimposed on the power line to supply drive power to each of the drive motors. And the setting device is connected to the power line via the multiplying means, so that the command signal transmission line is also used as the power line. According to the third aspect, the rotation command signal and the parameter command signal transmitted from the setting device are superimposed on the power line and transmitted to each driver. Therefore, in addition to the power line, the rotation command signal and the parameter command signal are transmitted. It is not necessary to provide a special transmission line.

[0010] The motor drive system according to claim 4 is
Motor drive of a single-weight driven textile machine including a plurality of drivers individually controlling a drive motor provided for each weight, and a setting device connected to the plurality of drivers via a command signal transmission line common to the plurality of drivers. In the system, the setting unit generates a rotation speed command signal having a frequency corresponding to a target rotation speed of each of the drive motors, and transmits the command signal to each of the drivers via the common command signal transmission line. And means for driving / stopping the drive motor according to the presence / absence of a rotation speed command signal from the setter. In the present invention, the driving / driving of each driving motor
Since the stop can be performed depending on whether or not the rotation command signal is received, it is not necessary to provide a transmission line for transmitting a drive / stop command signal for driving / stopping each drive motor.

The motor drive system according to claim 5 is
According to a fourth aspect of the present invention, each of the drivers includes an operation switch for individually switching drive / stop of each of the drive motors. In this claim 5,
By switching the operation switch of the unnecessary weight drive motor to the stop side in advance, only the necessary weight drive motor can be driven even if the rotation command signal is transmitted all at once.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a motor drive system of a single spindle drive type multiple twisting machine will be described below with reference to the drawings. 1 is a schematic diagram of a twisting machine, FIG. 2 is a configuration diagram of a motor drive system, FIG. 3 is a flowchart of a process of receiving a parameter command signal, FIG. 4 is a flowchart of a process of receiving a rotation speed command signal, and FIG. FIG. 7 is a configuration diagram of a modified example in the motor drive system.

First, a schematic configuration of the twisting machine according to the present embodiment will be described. In FIG. 1, reference numeral 1 denotes a machine of a twisting machine, 2 denotes a plurality of variable-speed drive motors arranged side by side on the machine 1, and 3 denotes a spindle which is coaxially rotated by each drive motor 2. Reference numeral 4 denotes a yarn supply package which is detachably mounted coaxially with each of the spindles 3, and is kept stationary by an appropriate braking means regardless of the rotation of the spindle 3.
5 is a yarn guide for guiding the yarn Y unwound from the yarn supply package 4 to the winding device, 6 is a feed roller for feeding the yarn Y to the winding device while adjusting the tension of the yarn Y, and 7 is a yarn. Traverse guide for traversing Y, 8
Is a winding drum for rotating the winding package 9 by surface contact. The traverse guide 7 is provided for each weight on the traverse shaft 10, and the drive shaft 10 is reciprocated in the axial direction by a drive mechanism on the control box 15 provided on the left side of the machine base 1. Winding drum 8
Are driven to rotate all at once.

In the above-described configuration of the twisting machine, the twisting operation of each weight is performed as follows. The yarn Y unwound from the yarn supply package 4 is guided downward through the inside from the tip of the spindle 3, and is discharged from below the spindle 3 rotating at high speed. Since the released yarn Y is unwound while turning from the yarn supply package 4, a single twist is applied at this stage. Further, the yarn Y discharged from below the spindle 3 is guided to the feed roller 6 through the yarn guide 5 while rotating around the outer periphery of the yarn supply package 4 by the rotation of the spindle 3. At this stage, the yarn Y released by the spindle 3 is swung around the yarn supply package 4, so that another twist is applied, and as a result, the twisted yarn Y provided with double twist is fed to the feed roller. 6 to the traverse guide 7. The twisted yarn Y adjusted to a predetermined tension by the feed roller 6
While being traversed by the traverse guide 7, is taken up by a take-up package 9 which is driven to rotate by a take-up drum 8.

In the present embodiment, as shown in FIG. 1, the twisted weight from the drive motor 2 to the winding drum 8 constitutes one span, for example, eight weights are arranged in the lateral direction of the machine base 1. ing. In an actual twisting machine, a number of spans are installed, all of which are controlled by a host computer (not shown).

Since the quality such as the number of twists of the twisted yarn Y wound by each of the weights fluctuates depending on the rotation speed of each spindle 3, it is necessary to eliminate the variation between the weights and keep the quality of the twisted yarn Y uniform. In addition, it is necessary to accurately control the rotation speed of the drive motor 2 of each weight based on a command signal from the signal setting device 50, and to accurately monitor the rotation speed of the drive motor 2 of each weight.

The control of each drive motor 2 is performed by a plurality of motor drivers 30. Then, each motor driver 30 for one span controls each drive motor 2 according to a command signal from the signal setting unit 50, and
The signal setting unit 50 for each span is configured to be integrally managed by the host computer. Each of these motor drivers 30 is connected to an AC / DC converter 45 provided in the control box 15 and supplies drive power to each drive motor 2 to generate control power.

Next, the configuration of the motor drive system according to the embodiment will be described. In FIG. 2, the signal setting device 50 is provided in the control box 15,
A command signal is transmitted to each motor drive 30 based on an instruction from the host computer, and is configured by a microcomputer having a timer circuit and the like.
The signal setting unit 50 is provided by a microcomputer with a rotation speed command signal of a pulse train frequency corresponding to the target rotation speed of each drive motor 2 and a parameter command signal (code: ), And each command signal is individually transmitted to each motor driver 30. In addition, as a parameter for setting operating conditions, in the case of a multiple twisting machine,
There is a rotation direction or the like for performing S twist or Z twist on the twisted yarn Y.

Each of the motor drivers 30 is an inverter module for controlling each of the drive motors 2, and is constituted by a microcomputer, an inverter circuit and the like. Each of these motor drivers 30 has a common command signal transmission line 4
0 is connected to the signal setting device 50. And
Each motor driver 30 identifies a rotation speed command signal or a parameter command signal based on the form of the command signal received from the signal setting device 50 via the common command signal transmission line 40, and outputs the rotation speed command signal, While controlling the rotation of each drive motor 2 based on the parameter command signal,
The rotation speed of the drive motor 2 is monitored based on the detection data of the rotation sensor 35. In addition, each motor driver 30
Are connected by a common power line 46 to the AC / DC converter 4
5 is connected. Then, each motor driver 30
Generates a control power supply by reducing the DC voltage converted by the AC / DC converter 45 from the AC power supply 47. Further, each motor driver 30 is provided with an operation switch 60 for individually switching drive / stop of each drive motor 2. Weight driving motor 2 that does not need to be driven in advance
By switching the operation switch 60 to the stop side, each command signal is transmitted to the common command signal transmission line 40.
Even if all the weights (all the drive motors 2) are transmitted at the same time, only the drive motors 2 of the necessary weights are operated. In the present embodiment, one motor driver 30 individually controls each drive motor 2, but may be provided for each of a plurality of spindles as long as each drive motor 2 is individually controlled. When one drive motor 2 is connected to one motor driver 30, one operation switch 60 is provided for each motor driver 30. 2 are connected, each driver 30 is provided with n operation switches 60.

Next, the transmission process in the motor drive system will be described with reference to FIGS. 3 and 4 in addition to FIG. In the motor drive system, it is assumed that all the operation switches 60 have been switched to the drive side, so that each drive motor 2 can be operated. This motor drive system is for controlling the rotation by driving each drive motor 2 after setting operating conditions for each motor driver 30 before starting the operation of all the weights of the twisting machine, for example.

First, in setting the operating conditions, as shown in FIG. 2, the signal setting unit 50 creates and transmits a parameter command signal having a predetermined number of bits indicating a parameter for setting the operating conditions. Then, as shown in FIG. 3, in S1, each motor driver 30 confirms the input of the pulse train frequency of the rotational speed command signal. If this input cannot be confirmed, each motor driver 30 checks the input level for the parameter command signal in S2, and if the input level is high (H), the parameter command serially transmitted from the signal setting unit 50 in S3. Receive the signal.
This parameter command signal has a predetermined number of bits, and transmission is normally started from a high level. Therefore, by setting the input level of each motor driver 30 to a high level (H), a mode in which a parameter command signal can be received is set. In S4, each motor driver 30 sets the operating conditions by processing the received parameter command signal, and returns the reception of the parameter command signal to the signal setting device 50 in S5. This parameter command signal is serially transmitted to each motor driver 30 via a common command signal transmission line 40, as shown in FIG. On the other hand, when the input of each pulse train frequency is confirmed in S1, each motor driver 30 drives each drive motor 2 and switches to a mode in which rotation control is performed. Also, S
2, when the input level is low level (L), each motor driver 30 enters a standby state in which the rotation of each drive motor 2 can be started.

As described above, by transmitting the parameter command signal to each motor driver 30 via the common command signal line 40 before the operation of the twisting machine is started, the rotation of each drive motor 2 is affected. And operating conditions can be set. The transmission of the parameter command signal is not limited to before the start of the operation of the twisting machine, and is performed during a period during which the rotation speed command signal is not transmitted from the signal setting device 50, that is, during a period during which each drive motor 2 is not rotating. Should be fine.

Next, the rotation control of each drive motor 2 by each motor driver 30 will be described. When the operating conditions are set for each motor driver 30, as shown in FIG.
The signal setting unit 50 creates and transmits a rotation speed command signal having a pulse train frequency corresponding to the target rotation speed of each drive motor 2. This rotation speed command signal is transmitted to each motor drive 30 via a common command signal transmission line 40, as shown in FIG. Then, as shown in FIG.
, Each motor driver 30 confirms the input of the pulse train frequency of the rotation speed command signal. If this input can be confirmed, the rotational speed command signal is subjected to data processing in S2 ',
In S3 ', the pulse train frequency is measured. In S4 ', each motor driver 30 sets the measured pulse train frequency to the set speed variable. In S5 ', each motor driver 30 drives each drive motor 2 by receiving the pulse train frequency, and controls each drive motor 2 so that the rotation speed according to the pulse train frequency of the rotation speed command signal and the operation condition of the parameter command signal are satisfied. 2 is controlled. If each motor driver 30 continues to receive the pulse train frequency of the rotation speed command signal in S6 ', it continues to drive each drive motor 2, and if it stops receiving the pulse train frequency, it stops each drive motor 2 in S7'. On the other hand, if each motor driver 30 cannot confirm the reception of the pulse train frequency in S1 ', the mode is switched to a mode capable of receiving the parameter command signal.

As described above, each of the motor drivers 30 switches between the mode for receiving the parameter command signal and the mode for driving and controlling the rotation of each drive motor 2 so that the parameter command signal and the rotation speed command signal are shared. Since the command signal transmission line can also be used separately for individual reception, for example,
It is not necessary to provide a transmission line for transmitting the parameter command signal. In addition, each motor driver 30
Drives or stops each drive motor 2 depending on whether or not the pulse train frequency of the rotation speed command signal is received. Therefore, a transmission line for transmitting a drive / stop command signal for driving or stopping each drive motor 2 is specially provided. There is no need to provide.

In order to change the rotation speed at a high speed during the rotation of each drive motor 2, the pulse train frequency generated and transmitted by the signal setting unit 50 is set to, for example, a high pulse train frequency. The high pulse train frequency is transmitted to each motor driver 30 via a common command signal transmission line 40, as shown in FIG. Each motor driver 30 performs the processing of S1 'to S5' shown in FIG. 4 to change each drive motor 2 to a high rotation speed corresponding to a high pulse train frequency. As described above, when the rotation speed of each drive motor 2 is changed, for example, by transmitting a high pulse train frequency to each motor driver 30 via the common command signal transmission line 40, the rotation speed of each drive motor 2 is changed. It can be changed under the same conditions.

Further, in the twisting machine, the drive motor 2 for the weight, which does not need to be operated in advance, is
By switching the operation switch 60 of the motor driver 30 corresponding to the stop position to the stop side, each command signal can be transferred to all the weights (all motor drivers 3) through the common command signal transmission line 40.
0) Even if they are transmitted all at once, it becomes possible to operate only the drive motor 2 of the necessary weight.

Next, a modified example of the motor drive system of the present embodiment will be described. In FIG. 5, the motor drive system is configured such that the command signal transmission line 40 is also used as the power line 46 and transmits each command signal of the signal setting device 50 by multiplying the power line 46. 5, the same reference numerals as those in FIGS. 1 and 2 denote the same members, and a description thereof will be omitted.

As shown in FIG. 5, reference numeral 55 denotes a multiplying device, which comprises a transformer 56, a modulator 57 and the like. The primary winding 56a of the transformer 56 is connected to the modulator 57 in the control box 15 and is connected to the secondary winding 56.
b is connected to the power line 46 in the control box 15. Further, the modulator 57 is connected to the signal setting device 50 in the control box 15, and the signal setting device 5
The 0 parameter command signal and the rotational speed command signal are modulated into an AC voltage corresponding to each command signal. In this motor drive system, each command signal transmitted from the signal setting device 50 is modulated into an AC voltage by the modulator 57, and the AC voltage corresponding to each command signal is converted by the transformer 56 into the power line 4.
6 is induced. Thus, on the power line 46, the DC voltage from the AC / DC converter 45 is multiplied by the AC voltage corresponding to each command signal, and the AC voltage corresponding to each signal is applied via the common power line 46. Each motor driver 30
Sent to. Each motor driver 30 receives a parameter command signal and a rotation speed command signal by demodulating and extracting an AC voltage component corresponding to each command signal by a demodulation circuit or the like. When a parameter signal is received, the signal can be binarized according to the difference in the frequency of the AC voltage. For example, a frequency higher than a predetermined frequency is determined to be 1 and a frequency lower than the predetermined frequency is determined to be O, so that the parameter signal is determined. Recognize the code shown. In the motor drive system shown in FIG.
Performs the same signal reception processing as in FIGS.

As described above, the rotational speed command signal and the parameter command signal transmitted from the signal setting device 50 are transmitted to the power line 4.
Since it is transmitted to each motor driver 30 by multiplying by 6, the transmission line for transmitting the rotation command signal and the parameter command signal other than the power line 46 does not need to be specially provided.

As described above, the embodiment of the present invention exemplifies the multiple twisting machine, but the present invention is applicable to a motor drive system of a false twisting machine and other various single-spindle-driven textile machines.

[0031]

As described above, according to the first aspect of the present invention, a rotation command signal and a parameter command signal are individually transmitted to each driver by using a common command signal transmission line. For example, it is not necessary to provide a transmission line for transmitting a parameter command signal.
As a result, the number of transmission lines for transmitting each command signal from the signal setting device can be reduced, and thus, in a single-spindle drive type textile machine including a plurality of weights, the wiring man-hour and the wiring cost over a plurality of weights can be reduced.

According to the present invention described in claim 2,
Since the parameter command signal is transmitted to each driver before the rotation of each drive motor starts, for example, the operating conditions can be set without affecting the rotation of each drive motor.

According to the present invention described in claim 3,
Since the rotation command signal and parameter command signal transmitted from the setting device are superimposed on the power line and transmitted to each driver, it is necessary to provide a transmission line for transmitting the rotation command signal and parameter command signal in addition to the power line. Therefore, the number of transmission lines can be reduced, and the number of wiring steps and wiring cost can be reduced.

According to the fourth aspect of the present invention, each drive motor can be driven or stopped by the presence or absence of a rotation command signal, so that a drive / stop command signal for driving / stopping each drive motor is transmitted. There is no need to provide a special line. As a result, the number of transmission lines for transmitting each command signal from the signal setting device can be reduced, and therefore, in a single-spindle drive type textile machine including a plurality of weights, the number of wiring steps and wiring costs over a plurality of weights can be reduced.

According to the fifth aspect of the present invention, with respect to the unnecessary weight drive motor, the operation switch is switched to the stop side so that even if the rotation command signal is transmitted all at once, Only the driving motor of the necessary weight can be operated.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a twisting machine according to an embodiment in which the present invention is applied to a motor drive system of a single spindle drive type textile machine.

FIG. 2 is a configuration diagram of the motor drive system of FIG. 1;

FIG. 3 is a flowchart of signal reception processing of a parameter command signal in each motor driver of the motor drive system of FIG. 1;

FIG. 4 is a flowchart of a signal reception process of a rotation speed command signal in each motor driver of the motor drive system of FIG. 1;

FIG. 5 is a configuration diagram showing a modified example of the motor drive system.

[Explanation of symbols]

 2 Drive motor 30 Motor driver 40 Command signal transmission line 46 Power line 50 Signal setting unit 55 Multiplication device

Claims (5)

[Claims] 1. A single weight drive type comprising: a plurality of drivers individually controlling a drive motor provided for each weight; and a setting device connected to the plurality of drivers via a command signal transmission line common to the plurality of drivers. In the motor drive system of a textile machine, the setting device creates a rotation speed command signal having a frequency corresponding to a target rotation speed of each of the drive motors, and a parameter command signal indicating a parameter for setting operating conditions,
Means for transmitting the respective command signals to the respective drivers via the common command signal transmission line in different signal forms, wherein each of the drivers converts a rotational speed command signal and a parameter command signal received from the setting device. A motor drive system for a single spindle drive type textile machine, comprising: means for distinguishing and recognizing and controlling each of the drive motors based on the recognition result. 2. The single spindle driven textile machine according to claim 1, wherein the setting device transmits the parameter command signal to each of the drivers during a non-transmission period of the rotation speed command signal. Motor drive system. 3. A power line commonly connected to the plurality of drivers for supplying drive power to each of the drive motors, and a multiplex for superposing each command signal of the setting device on the power line. Means, and the setter is connected to the power line via the multiplying means,
The motor drive system for a single-spindle-driven textile machine according to claim 1 or 2, wherein the command signal transmission line is also used as the power line. 4. A single weight drive type comprising: a plurality of drivers individually controlling a drive motor provided for each weight; and a setting device connected to the plurality of drivers via a command signal transmission line common to the plurality of drivers. In the motor drive system of a textile machine, the setting unit creates a rotation speed command signal having a frequency corresponding to a target rotation speed of each of the drive motors, and transmits the command signal to the respective drive motors via the common command signal transmission line. A motor for driving the single-spindle-type textile machine, comprising: means for transmitting to a driver; and means for driving / stopping the drive motor in accordance with the presence or absence of a rotation speed command signal from the setting device. system. 5. The motor drive system according to claim 4, wherein each of the drivers includes an operation switch for individually switching drive / stop of each of the drive motors. .