JP4048702B2 - Motor drive system for single spindle driven textile machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a single spindle drive type textile machine, and relates to a motor drive system for individually controlling a drive motor provided for each spindle.
[0002]
[Prior art]
Conventionally, 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 is known. In this twister, each drive motor is individually controlled by a plurality of motor drivers provided for each weight or for each of a plurality of weights.
[0003]
In the twisting machine having such a configuration, the rotational speed (the number of rotations) of each drive motor affects the quality of the twisted yarn between the spindles, and therefore, there is a demand for rotation control without variations in the drive motors between the spindles. . For this reason, in the twisting machine, a rotational speed command signal for controlling each drive motor to a target rotational speed, a parameter command signal for setting operating conditions, and a drive / stop command for driving / stopping each drive motor Independently from the signal, it is sent individually to each motor driver. This rotational speed command signal is transmitted from the signal setter to each driver via the rotational speed transmission line. Further, the parameter command signal is transmitted from the signal setting device to each motor driver via a serial transmission line, and the drive / stop signal is also transmitted from the signal setting device to each motor driver via the driving transmission line.
[0004]
Each of these motor drivers accurately monitors the rotational speed of each drive motor, and optimizes the rotation of each drive motor based on each command signal transmitted from the signal setting device via the three transmission lines. It comes to control.
[0005]
[Problems to be solved by the invention]
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 the single spindle drive type multiple twisting machine composed of a plurality of spindles, there is a problem that three transmission lines have to be wired over the plurality of spindles, which increases wiring man-hours and wiring costs.
[0006]
Accordingly, the present invention provides a motor drive for a single spindle driven textile machine that can reduce the number of transmission lines and the wiring cost for a plurality of spindles by reducing the number of transmission lines for transmitting each command signal to each driver. The purpose is to provide a system.
[0007]
[Means for Solving the Problems]
The motor drive system according to claim 1, which achieves the above object, includes a plurality of drivers for individually controlling the drive motors provided for the respective weights, and a target rotational speed of each of the drive motors connected to the plurality of drivers. A setting device configured to create a rotation speed command signal having a frequency corresponding to the parameter and a parameter command signal indicating a parameter for setting an operation condition, and to transmit each command signal to each driver; Each of the drivers recognizes the command signals received from the setting device, and controls the drive motors based on the recognition result. The controller sends the rotational speed command signal and the parameter command signal to each driver through a common command signal transmission line connecting the setter and each driver. And, further, the setting device, the non-transmission period of said rotational speed command signal is shall be transmitted to the parameter command signal to each driver. In the first aspect, since the rotation command signal and the parameter command signal are individually transmitted to each driver by using the common command signal transmission line, it is not necessary to provide a transmission line for transmitting the parameter command signal. . Further, since the parameter command signal is transmitted to each driver during the non-transmission period of the rotation speed command signal, the operating condition can be set for each driver without affecting the rotation of each drive motor.
[0008]
A motor drive system according to a second aspect is the motor drive system according to the first aspect, wherein the operation condition includes a rotation direction of the drive motor .
[0009]
A motor drive system according to a third aspect of the present invention is the motor drive system according to the first or second aspect, wherein a power line commonly connected to the plurality of drivers is provided to supply drive power to the drive motors. A weighting means for multiplying each command signal on the power line, and connecting the setting device to the power line via the weighting means, whereby the command signal transmission line is connected to the power line. This is also used in combination.
According to the third aspect of the present invention, the rotation command signal and 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 parameter command signal are transmitted. There is no need to provide a special transmission line.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments in which the present invention is applied to a motor drive system of a single spindle driven 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 processing for receiving a parameter command signal, FIG. 4 is a flowchart of processing for receiving a rotation speed command signal, and FIG. These are the block diagrams of the modification in a motor drive system.
[0013]
First, a schematic configuration of the twisting machine in the present embodiment will be described. In FIG. 1, reference numeral 1 denotes a machine base of a twisting machine, 2 denotes a plurality of variable speed drive motors arranged side by side on the machine base 1, and 3 denotes a spindle that is rotationally driven coaxially by each drive motor 2. Reference numeral 4 denotes a yarn feeding package that is detachably mounted coaxially with each spindle 3 and is held in a stationary state regardless of the rotation of the spindle 3 by appropriate braking means. 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 the yarn. A traverse guide 8 for traversing Y, and a winding drum 8 for rotationally driving the winding package 9 by surface contact. The traverse guide 7 is installed on the traverse shaft 10 for each weight, and the traverse shaft 10 is reciprocated in the axial direction by a drive mechanism on the control box 15 side installed on the left side of the machine base 1. The winding drum 8 is rotationally driven all at once.
[0014]
In the above twister configuration, the twisting operation of each weight is performed as follows. The yarn Y unwound from the yarn supply package 4 is guided downward from the tip of the spindle 3 through the inside, and is discharged from below the spindle 3 rotating at high speed. Since the yarn Y to be discharged is unwound while turning from the yarn supplying 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 turning 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 supplying package 4, so that another twist is applied, and as a result, the twisted yarn Y 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 is wound around a winding package 9 that is rotationally driven by a winding drum 8 while being traversed by a traverse guide 7.
[0015]
In the present embodiment, as shown in FIG. 1, the twisted yarn weights that reach the winding drum 8 from the drive motor 2 constitute, for example, eight spans in parallel in the lateral direction of the machine base 1. In an actual twisting machine, a large number of spans are installed, and all of them are controlled by a host computer (not shown).
[0016]
The quality, such as the number of twists, of the twisted yarn Y wound around each of these weights varies depending on the rotational speed of each spindle 3, and in order to eliminate the variation between the weights and keep the quality of the twisted yarn Y uniform It is necessary to accurately control the rotational speed of the drive motor 2 based on the command signal from the signal setter 50 and to accurately monitor the rotational speed of the drive motor 2 of each spindle.
[0017]
Such 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 by a command signal from the signal setting device 50, and further, the signal setting device 50 for each span is integratedly managed by the host computer. Yes. Each of these motor drivers 30 is connected to an AC / DC converter 45 disposed in the control box 15, and supplies drive power to each drive motor 2 to generate control power.
[0018]
Next, the configuration of the motor drive system in the embodiment will be described. In FIG. 2, the signal setting device 50 is disposed in the control box 15 and transmits a command signal to each motor drive 30 based on an instruction from the host computer. It is configured. This signal setter 50 is a microcomputer that uses a microcomputer to output a rotation speed command signal having a pulse train frequency corresponding to the target rotation speed of each drive motor 2 and a parameter command signal (code) having a predetermined number of bits indicating parameters for setting operating conditions. Signal) and each command signal is individually transmitted to each motor driver 30. In addition, as a parameter for setting an operating condition, in the case of a multiple twisting machine, there are a rotation direction for performing S twisting or Z twisting of the twisted yarn Y, and the like.
[0019]
Each motor driver 30 is an inverter module that controls each drive motor 2, and is constituted by a microcomputer, an inverter circuit, and the like. These motor drivers 30 are connected to a signal setting device 50 by a common command signal transmission line 40. Each motor driver 30 identifies whether it is a rotational speed command signal or a parameter command signal based on the form of the command signal received from the signal setter 50 via the common command signal transmission line 40, and the rotational speed command The rotation control of each drive motor 2 is performed based on the signal and the parameter command signal, and the rotation speed of the drive motor 2 is monitored by the detection data of the rotation sensor 35. Each motor driver 30 is connected to an AC / DC converter 45 by a common power line 46. Each motor driver 30 depressurizes the DC voltage converted by the AC / DC converter 45 from the AC power supply 47 to generate a control power supply. Further, each motor driver 30 includes an operation switch 60 for individually switching driving / stopping of each driving motor 2. For the drive motor 2 of the weight that does not need to be operated in advance, all the weights (all the drive motors 2) are simultaneously transmitted through the common command signal transmission line 40 by switching the operation switch 60 to the stop side. Even if transmitted to, only the drive motor 2 of the necessary weight is operated. In this embodiment, one motor driver 30 controls each drive motor 2 individually. However, as long as each drive motor 2 is individually controlled, it may be provided for each of a plurality of spindles. Further, when one drive motor 2 is connected to one motor driver 30, one operation switch 60 is provided for each motor driver 30, but n drive motors are provided for one driver 30. When two are connected, each driver 30 is provided with n operation switches 60.
[0020]
Next, transmission processing 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 are switched to the drive side so that each drive motor 2 can be operated. This motor drive system, for example, drives and controls the rotation of each drive motor 2 after setting the operation conditions for each motor driver 30 before starting the operation of all the spindles of the twisting machine.
[0021]
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. As shown in FIG. 3, in S1, each motor driver 30 confirms the input of the pulse train frequency of the rotation speed command signal. If this input cannot be confirmed, each motor driver 30 confirms 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 setter 50 in S3. Receive a signal. This parameter command signal has a predetermined number of bits and is normally started to be transmitted from a high level. Therefore, by setting the input level of each motor driver 30 to a high level (H), a mode in which the parameter command signal can be received is set. In S4, each motor driver 30 sets the operating condition by processing the received parameter command signal, and returns the reception of the parameter command signal to the signal setter 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 is switched to a mode for controlling rotation. If the input level is low (L) in S2, each motor driver 30 enters a standby state in which the rotation of each drive motor 2 can be started.
[0022]
As described above, the parameter command signal is transmitted to each motor driver 30 through the common command signal line 40 before starting the operation of the twisting machine, so that the rotation of each drive motor 2 is not affected. 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 a period during which the rotation speed command signal is not transmitted from the signal setting device 50, that is, a period during which each drive motor 2 is not rotating. If it is.
[0023]
Next, rotation control of each drive motor 2 by each motor driver 30 will be described. When the operating conditions are set in each motor driver 30, the signal setting device 50 creates and transmits a rotational speed command signal having a pulse train frequency corresponding to the target rotational speed of each drive motor 2, as shown in FIG. The rotational 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. 4, in S1 ′, 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 processed in S2 ', and the pulse train frequency is measured in S3'. 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 each drive motor 2 is set so that the rotational speed according to the pulse train frequency of the rotational speed command signal and the operating condition of the parameter command signal are satisfied. 2 rotation is controlled. If each motor driver 30 continues to receive the pulse train frequency of the rotational speed command signal in S6 ', it continues to drive each drive motor 2, and if it no longer receives 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 in which the parameter command signal can be received.
[0024]
Thus, each motor driver 30 transmits the parameter command signal and the rotation speed command signal to a common command signal by switching between the mode for receiving the parameter command signal and the mode for driving and rotating the drive motors 2. For example, it is not necessary to provide a transmission line for transmitting the parameter command signal.
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, so that a drive / stop command signal for driving or stopping each drive motor 2 is transmitted. There is no need to provide a special transmission line.
[0025]
Further, in order to change the rotation speed at a high speed while each drive motor 2 is rotating, the pulse train frequency generated and transmitted by the signal setting device 50 is set to a high pulse train frequency, for example. 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 driving motor 2 to a high rotational speed corresponding to a high pulse train frequency.
As described above, when the rotational 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 rotational speed of each drive motor 2 is changed. It can be changed under the same conditions.
[0026]
Furthermore, in the twisting machine, for the drive motor 2 of the weight that does not need to be operated in advance, the command signal is shared by switching the operation switch 60 of the motor driver 30 corresponding to the drive motor 2 to the stop side. Even if all the weights (all motor drivers 30) are transmitted all at once via the command signal transmission line 40, only the driving motor 2 of the necessary weights can be operated.
[0027]
Next, a modified example of the motor drive system of this 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 a power line 46, and each command signal of the signal setting device 50 is transmitted by being superimposed on the power line 46. In FIG. 5, the same reference numerals as those in FIGS. 1 and 2 indicate the same members, and the description thereof is omitted.
[0028]
As shown in FIG. 5, reference numeral 55 denotes a weighting device, which is composed of a transformer 56, a modulator 57, and the like. The primary side winding 56 a of the transformer 56 is connected to the modulator 57 in the control box 15, and the secondary side winding 56 b is connected to the power line 46 in the control box 15. The modulator 57 is connected to the signal setting device 50 in the control box 15 and modulates the parameter command signal and the rotation speed command signal of the signal setting device 50 to 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 an AC voltage corresponding to each command signal is induced on the power line 46 by the transformer 56. Thus, on the power line 46, an AC voltage corresponding to each command signal is multiplied by the DC voltage from the AC / DC converter 45, and the AC voltage corresponding to each signal is passed through the common power line 46. It is transmitted to each motor driver 30. 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. Also, when receiving a parameter signal, the signal can be binarized by the difference in the frequency of the AC voltage. For example, by determining that the frequency higher than the predetermined frequency is 1 and that the lower frequency is O, the parameter signal is The code shown can be recognized. In the motor drive system shown in FIG. 5, each motor driver 30 performs a signal reception process similar to that shown in FIGS.
[0029]
As described above, the rotation speed command signal and the parameter command signal transmitted from the signal setter 50 are superimposed on the power line 46 and transmitted to each motor driver 30. In addition to the power line 46, the rotation command signal and the parameter command signal are transmitted. There is no need to provide a transmission line for transmitting a signal.
[0030]
As mentioned above, although the multiple twisting machine was illustrated in the embodiment of the present invention, the present invention can be applied to the motor driving system of false twisting machine and other various single spindle driving type textile machines.
[0031]
【The invention's effect】
As described above, according to the first aspect of the present invention, the rotation command signal and the parameter command signal are individually transmitted to each driver by using a common command signal transmission line. There is no need to provide a transmission line for transmitting a signal. 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 composed of a plurality of spindles, the wiring man-hours and wiring costs over a plurality of spindles can be reduced. Further, since the parameter command signal is transmitted to each driver before the start of rotation of each drive motor, for example, the operation condition can be set without affecting the rotation of each drive motor.
[0033]
According to the third aspect of the present invention, the rotation command signal and parameter command signal transmitted from the setting device are superimposed on the power line and transmitted to each driver. In addition, it is not necessary to provide a transmission line for transmitting the parameter command signal, and the number of transmission lines can be reduced to reduce the wiring man-hour and the wiring cost.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a twisting machine in an embodiment in which the present invention is applied to a motor driving system of a single spindle driving 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.
4 is a flowchart of signal reception processing of a rotation speed command signal in each motor driver of the motor drive system of FIG.
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 setter 55 Double riding device

Claims (3)

A plurality of drivers for individually controlling drive motors provided for each weight;
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 operation conditions are created and connected to the plurality of drivers. A setter configured to transmit to each of the drivers;
With
Each driver recognizes each command signal received from the setting device, and controls each drive motor based on the recognition result.
In the motor drive system of a single spindle drive type textile machine,
The setter transmits the rotation speed command signal and the parameter command signal to the drivers via a common command signal transmission line that connects the setter and the drivers,
In addition, the setting device, the non-transmission period of said rotational speed command signal, that sends the parameter command signal to each driver,
A motor drive system for a single spindle driven textile machine. The operating condition includes a rotation direction of the drive motor,
The motor drive system for a single spindle driven textile machine according to claim 1. A power line commonly connected to the plurality of drivers for supplying drive power to the drive motors; and a weighting means for multiplying the command signals of the setting device on the power lines. The command signal transmission line is also used as the power line by connecting the setting device to the power line via the weighting means. The motor drive system of the single spindle drive type textile machine of description.

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