JP3463667B2 - Traverse device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt forward / backward traverse device, and more particularly to a traverse device using a DC brushless motor as a drive motor.

[0002]

Belt forward / reverse traverse devices are known. As shown in FIG. 10, a conventional traverse device 100
Is a drive pulley 101, guide pulleys 102, 103
By driving the drive belt body 104 wound on the drive belt body forward and reverse by a stepping motor 106 connected to the drive pulley 101, the traverse guide 107 attached to the drive belt body 104 is reciprocated to reciprocate the yarn. Is to do. In recent years, as the speed of the apparatus has increased, it has been required to reciprocate the traverse guide 107 several dozen times per second.

[0003]

However, in such a conventional traverse device 100, since the stepping motor 106 is used as the drive motor, there are the following drawbacks.

The stepping motor 106 is generally a low speed motor and is not suitable for high speed operation. Therefore, in order to reciprocate the traverse guide 107 a few dozen times per second, it is necessary to increase the diameter of the drive pulley 101, which causes a problem that the traverse device 100 itself becomes large.

Further, when the diameter of the driving pulley 101 is increased, the inertia (inertia) of the rotating body increases, and there is a problem that it is difficult to perform high-precision positioning accuracy in high-speed operation. Since strong tension is applied to the drive belt 104 when the motor 106 is reversed, it is difficult to properly brake the traverse guide 107 at the traverse end. Therefore, it becomes difficult to control the traverse inversion position with high accuracy.

Due to the structure in which the direction of the current is switched and driven by the step signal, vibration may increase and the shape of the winding package may be disturbed. In order to prevent vibration, it is necessary to attach a damper or anti-vibration rubber and perform special control for preventing vibration.

Since the output torque of the motor is not proportional to the current value, the load of the motor (for example, the state of the drive belt) cannot be monitored from the current value. Since it drives at high speed in forward and reverse directions,
A strong force is applied to the drive belt at the time of reversing, and a weak belt may be broken. In addition, due to the structure of the stepping motor 106, there is a problem that the regenerative power cannot be easily extracted.

Therefore, an object of the present invention is to solve the above problems and to provide a traverse device capable of high-speed operation and capable of highly accurate positioning control.

[0009]

The present invention was conceived to achieve the above object, and the invention of claim 1 is mounted on a drive belt body by driving the drive belt body in forward and reverse directions. In a traverse device that traverses the yarn by reciprocating the attached traverse guide, a DC brushless motor that drives the drive belt body in the forward and reverse directions, and a rotation detector for detecting the rotational position of the DC brushless motor, Detects the current value flowing in a DC brushless motor
Current detector and a control device that performs position feedback control of the DC brushless motor based on the detection signal of the rotation detector , and the control device controls the current detected by the current detector.
Output torque of DC brushless motor that is proportional to the value
Is a traverse device that determines an abnormality of the drive belt body based on the change of

According to the above construction, high speed operation is possible and the drive wheels (drive pulleys) can be downsized. The inertia of the rotating body is reduced and the position feedback control enables highly accurate positioning in high-speed operation. There is almost no vibration during rotation, and good winding is possible. Since the current value and the torque are in a proportional relationship, the load (torque) of the motor can be monitored from the current value. The traverse guide can be satisfactorily braked at the traverse end portion by utilizing the regenerated electric power that can be easily taken out.

[0011] In addition, according to this configuration, the control device, times
Of the DC brushless motor based on the detection signal of the rotation detector
By performing position feedback control, DC
Rotation position of brushless motor (position of traverse guide
Control the current of the DC brushless motor according to
There is. The current value detected by this current control is detected by the current detector.
Current by monitoring the current value with a controller.
Current value detected by detector and output of DC brushless motor
Since it is proportional to torque, DC brushless motor
Can detect abnormal output torque (load)
Therefore, the belt state can be monitored based on the change in the current value. For example, it is possible to detect quickly and reliably that the drive belt body is cut.

According to a second aspect of the present invention, there is provided a compound winding machine constituting a yarn winding machine.
DC brushless motors are provided for each number of weights
Direct to multiple drive circuits provided for each brushless motor.
A common rectifier circuit is connected via the flow bus,
Is the regenerative power generated by a DC brushless motor of a certain weight.
Is taken out by the drive circuit, and the DC of other weights is fed through the DC bus.
DC brush of a certain weight to be consumed by a brushless motor
While the series motor is decelerating, the DC brushless motor
At least some direct current
Control so that the forward / reverse drive phase of the ladderless motor is different
The traverse device according to claim 1.

[0013]

[0014]

[0015]

According to this structure, power consumption can be reduced. By the control device, for example, of a weight DC brushless
Sumota is a DC brushless motor of the other of the weight during deceleration
By controlling so as to be in acceleration, regenerative power from a DC brushless motor of one weight generated by deceleration can be consumed by a DC brushless motor of another weight via a common DC bus. . When the DC brushless motors for all spindles are decelerated all at once, the bus voltage rises due to the regenerative power and is consumed by the resistor for discharging the regenerative power. According to the present invention, such useless power consumption can be suppressed.

[0017]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a traverse device 1 which is a preferred embodiment of the present invention.

As shown in FIG. 1, the traverse device 1 of the present invention drives the drive belt body 2 in the forward and reverse directions.
A DC brushless motor 5 for reciprocally moving the traverse guide 4 attached to the drive belt body 2 to traverse the yarn Y, and for driving the drive belt body 2 in the forward and reverse directions.
As will be described later, a rotation detector for detecting the rotation speed and the rotation position of the DC brushless motor 5 and a controller for performing position feedback control of the DC brushless motor 5 based on the detection signal of the rotation detector are provided. It is a thing.

The drive belt body 2 is wound around a drive pulley 6 and guide pulleys 7 and 8 for use. As the drive belt body 2, for example, there is no slippage, noise is small,
A timing belt suitable for high speed rotation is used. Other than the timing belt, wires, strings, metal cables,
A flat belt, a V-belt, a metal belt, a chain or the like may be used.

A substantially rectangular linear guide 9 is provided along the inner surface of the drive belt body 2 between the guide pulleys 7 and 8. The linear guide 9 is for guiding the traverse guide 4 along the traverse direction.

FIG. 1 shows an example of an operating state of the traverse device 1, in which a yarn Y supplied from a yarn supplying bobbin (not shown) via a yarn feeding roller is moved by the traverse device 1 in the left-right direction (the axis of the bobbin 10). Direction), and a state in which the bobbin 10 is wound around the bobbin 10. Bobbin 1
0 is located at the center of the winding package 11, and the winding package 1 is formed by winding the yarn on the bobbin 10.
1 is formed.

The yarn Y is sandwiched between the rotating drum 13 which is rotated by the drum driving motor 12 and the bobbin 10, and a predetermined tension is applied between the rotating drum 13 and the bobbin 10 and the yarn feeding roller. That is, the rotary drum 13 and the winding package 11 are in contact with each other, and the winding package 11 is in contact with the rotating drum 13 and is driven to rotate.

Cradles 14 are provided at both ends of the bobbin 10. The cradle 14 is the winding package 11
This is for rotatably supporting the (bobbin 10).

A rotation detector 15 is provided on the outer periphery of one end of the bobbin 10. The rotation detector 15 is for detecting the rotation speed of the winding package 11, and the bobbin 1
A pulse signal (cradle pulse CP) having a frequency corresponding to the rotation speed of 0 is output. The detection signal (cradle pulse CP) of the rotation detector 15 is input to the control means described later.

In the case of the false twisting machine, the winding package 11 is a taper end package in which both axial end surfaces are inclined. This can be manufactured by controlling the motor 5 to gradually narrow the traverse width as the winding progresses (the inversion position is gradually moved to the inner side).

The present invention is, for example, a partially drawn yarn (POY).
False-twist processing (adding crimpability) to multifilament yarns such as
It can be applied to a false twisting machine which is applied with and wound. Usually, in a false twisting machine, the traverse width is gradually reduced as the winding thickness increases, and a taper end package is manufactured.
Of course, the present invention is not limited to the false twisting machine, but can be applied to various winding machines including a spinning winder, an automatic winder, a spinning machine (spinning machine), and a multiple twisting machine.

Maximum traverse width TW of the traverse device 1
Is about 254 mm when applied to a false twisting machine, for example. In the present invention, since the DC brushless motor 5 is used, it is possible to rotate at a high speed.
The diameter can be as small as about 38 mm. Under such a condition, the drive pulley 6 has about 2 more turns while the traverse guide 4 moves from one end to the other end.
The traverse guide 4 reciprocates about 12 times per second (in the case of 700 double strokes), and the rotation speed of the DC brushless motor 5 is about 50 rotations per second.

Now, the DC brushless motor 5 will be briefly described.

The DC brushless motor (DC brushless motor) is a motor in which the functions of the commutator and the brush of the DC brush motor are replaced by a magnetic sensor (for example, Hall element) and a semiconductor (for example, transistor) built in the motor. With a controller separately provided, the position of the rotor is detected by a magnetic sensor, and the signal controls the current flowing through the motor coil by the semiconductor.

FIG. 2 is a sectional view of the DC brushless motor 5.

As shown in FIG. 2, in the DC brushless motor 5, a rotor 21 is provided on the outer circumference of the shaft 20, and a stator 22 is provided on the outer circumference of the rotor 21 at intervals. The rotor 21 is a permanent magnet, and four N poles and S poles are alternately arranged in the circumferential direction in the drawing. A motor coil 23 (U-phase winding 23
u, V-phase winding 23v, W-phase winding 23w) are wound so as to form a three-phase star connection.

FIG. 3 is a circuit diagram showing the connection relationship between the DC brushless motor, the drive circuit, and the control device according to the present invention.

As shown in FIG. 3, a drive circuit 30 for driving the DC brushless motor 5 is connected to the motor coil 23. The drive circuit 30 has a pulse width control (P
A control device (controller) 31 for controlling the rotation of the DC brushless motor 5 by the WM) is connected.

The drive circuit 30 includes, for example, six bipolar field effect transistors 32a to 32f (IGB).
T: 3 using Insulated Gate Bipolar Transistor
A phase bridge type circuit is used, and each IGBT 32a ~
A diode 3 is placed between the emitter and collector terminals of f.
3a-f are connected. U-phase winding 23u is an IGBT
Between 32a and 32d, the V phase winding 23v is the IGBT 32.
W-phase winding 23w is connected between IGBTs 32c, 3b
It is connected between 2f. The controller 31 is for each IG
It is connected to the gate terminals of BTs 32a-f.

In the DC brushless motor 5, the upper and lower IGBTs 32 are alternately turned on and off in a certain order in response to a pulse signal from the controller 31, and the direction of the current of the motor coil 23 is changed to rotate. Since the DC brushless motor 5 has no brush, it is maintenance-free and eliminates friction loss and can handle a considerable capacity class. Furthermore, since the starting torque is large, it has a good start-up, there is almost no vibration during rotation, there is a proportional relationship between the current value and torque, regenerative power can be easily extracted, and it does not depend on the power supply frequency. There are advantages.

FIG. 4 is a simplified circuit diagram of the circuit shown in FIG.

As shown in FIG. 4, a parallel capacitor 45 for averaging and smoothing the rectified DC pulsating wave is connected to the DC bus 44. While the DC brushless motor 5 is decelerating, for example, the IGBTs 32a, 32
Since f is OFF, the motor acts as a generator and acts as a brake, and the regenerative electric power RP is stored in the parallel capacitor 45 via the motor winding 33 and the diodes 33a and 33f. As will be described later with reference to FIG.
The regenerative electric power RP generated in the DC brushless motor 5 of the decelerating weight is transmitted from the parallel condenser 45 to the plurality of motors 5.
It may be supplied to the DC brushless motor 5 of another weight that is accelerating via the common DC bus to the (driving circuit 30).

In the present invention, when the traverse guide 4 is trying to approach the traverse end which is the reverse position, D
The C brushless motor 5 is decelerating. At this time, DC
Since the brushless motor 5 functions as a generator and acts as a brake, and the inertia (inertia) of the rotating body such as the drive pulley 6 is small, the traverse guide 4 is prevented from being applied to the drive belt body 2 with a strong tension. It is possible to control the reversal position with high accuracy by satisfactorily braking near the end. When the traverse guide 4 reaches the traverse end, the DC brushless motor 5 reverses and starts accelerating in the direction opposite to the direction of rotation until then, and the traverse guide 4 moves away from the traverse end. In this way, the traverse device 1 of the present invention can smoothly reciprocate the traverse guide 4.

Next, the drive circuit of the DC brushless motor 5 will be described.

FIG. 5 is a block diagram for driving the DC brushless motor 5 according to the present invention (when performing highly accurate position control).

As shown in FIG. 5, the driving circuit 50 includes a commercial AC power supply 51, a rectifying circuit 52 for rectifying the commercial AC power supply 51, and a driving circuit 30 for driving the DC brushless motor 5 with the rectified DC. , A rotor position detector 53 built in the DC brushless motor 5, a rotary encoder 54 as a rotation detector for detecting the rotation of the DC brushless motor 5, a drive circuit 30, and a DC brushless motor.
Connected to the drive circuit 30, the rotor position detector 53, the rotary encoder 54, and the current sensor 55, and the current sensor 55 as a current detector provided between the motors 5 to detect the value of the current flowing in the motor coil 23. , The control device (controller) 3 to which the command speed V is input as a voltage
1 and a power supply circuit 56 for generating control power supplied to the rotor position detector 53, the controller 31 and the like.

As the rotor position detector 53, for example,
Three Hall sensors, which are magnetic sensors, are used.
As the rotary encoder 54, an incremental type encoder that outputs a pulse signal P having a frequency according to the rotation speed of the DC brushless motor 5 and a pulse number according to the rotation position is used. The rotary encoder 54 is also adapted to grasp the origin position. More specifically, the one that outputs about 2000 pulses / revolution is used,
The accuracy is about several tens of μm.

The power supply circuit 56 is connected between the power supply lines of a DC voltage of about 280 V rectified by the rectifier circuit 52, converts the high voltage DC voltage into a low voltage control voltage, and the rotor position detector. A DC voltage of about 7V is supplied to 53, and a DC voltage of about 15V is supplied to the controller 31.

The driving circuit 50 is for inputting the pulse signal P of the rotary encoder 54, which has a large number of output pulses, to the controller 31 instead of the detection signal of the Hall sensor to perform position feedback control. As a result, highly accurate positioning control of the traverse device 1 can be performed.

As described with reference to FIG. 1, the controller 31 is also connected to the rotation detector 15 for detecting the rotation speed of the winding package 11.

When the rotary drum 13 is rotating at a substantially constant speed, the peripheral speed of the winding package 11 rotating in contact with the rotating drum 13 becomes a substantially constant speed, so that the diameter of the winding package 11 gradually increases. (Rotation speed of the bobbin 10) will gradually decrease.

Therefore, the controller 31 can obtain the diameter of the winding package 11 by detecting the rotation speed of the winding package 11 using the rotation detector 15. That is, the controller 31 uses the cradle pulse C
The package diameter can be calculated based on the frequency of P. Then, the controller 31 controls the reciprocating movement of the traverse guide 4 (forward / backward drive of the motor 5) so that the winding width becomes according to the package diameter, whereby a taper end package having a preset taper angle can be manufactured. .

Thus, the traverse device 1 of the present invention
Uses the DC brushless motor 5 as a drive motor, it is possible to operate at high speed, and the drive wheels (drive pulley 6) can be downsized. Therefore, the inertia of the rotating body is reduced. Furthermore, by performing position feedback control of the DC brushless motor 5 based on the detection signal of the rotation detector, highly accurate positioning in high speed operation can be performed.

Since the DC brushless motor 5 has almost no vibration during rotation, good winding can be performed. Further, when the motor current is I, the output torque is T, and the torque constant is Kt, the relational expression of T = Kt × I is expressed. Since the current value and the output torque are in a proportional relationship, the load of the motor is calculated from the current value. (Torque) can be monitored. Further, the traverse guide 4 can be satisfactorily braked at the traverse end portion by utilizing the regenerated electric power which can be easily taken out.

In addition to the magnetic sensor which is the rotor position detector 53, as a rotation detector, for example, by using the rotary encoder 54 which outputs several hundred to tens of thousands of pulse signals per rotation, High-precision positioning control is possible.

Next, the control by the control device (controller) 31 according to the present invention will be described in more detail.

FIG. 6 is a block diagram showing an example of control by the controller 31 (controller) of the drive circuit 50 shown in FIG.

As shown in FIG. 6, the controller 31 is
First, the adder 60 adds the position command signal a and the position feedback signal b from the rotary encoder 54, and the position control element 61 generates the position control signal c. The position control element 61 measures the position for each pulse of the position feedback signal b and generates a position control signal c. Next, the adder 62 adds the position control signal c and the speed feedback signal d from the rotary encoder 54, and the speed control element 63 generates the speed control signal e. Speed control element 63
Measures the velocity from the pulse interval for each pulse of the position feedback signal b. Then, the adder 64 adds the speed control signal e and the current feedback signal f from the current sensor 55, and the torque control element 65 generates the torque control signal g. The controller 31 generates a pulse signal h in the PWM circuit 66 based on the torque control signal g and inputs it to the drive circuit 50 to control the DC brushless motor 5.

As described above, the controller 31 performs the current feedback control based on the detection signal of the current detector at the same time as the position and speed feedback control.

According to the present invention, the speed feedback control can accurately match the speeds during the acceleration period and the deceleration period with the set speed. Therefore, it is possible to reliably prevent the height of the ear and the ribbon. In addition, the current feedback control can control the torque that is proportional to the current value, and even if an excessive load is applied to the motor during high-speed reversal, the motor loses synchronization (the positional relationship between the rotor magnet and the stator coil shifts). ) Can be reliably prevented.

Further, the controller 31 uses the current sensor 5
The abnormality determination is also performed based on the change in the current value detected in 5. Thereby, the belt state can be monitored based on the change in the current value. For example, the drive belt body 2
It is possible to quickly and surely detect that the paper has run out.

Rotary encoder 5 as a rotation detector
No. 4 is unnecessary if high-precision position control is not necessary.
For example, when the present invention is applied to a machine that can be rotated at a constant speed, the rotation speed of the DC brushless motor 5 may be calculated from the signal of the hall sensor as the rotor position detector 53.

In this case, the driving circuit 7 as shown in FIG.
0 may be used. In the drive circuit 70, the detection signal from the rotor position detector 53 is frequency / voltage converted by the F / V converter 71, and the comparator 72 determines the magnitude of the voltage and the commanded speed V as a voltage, and the controller 72 It is input to 31 and is for performing position feedback control by the signal of the hall sensor.

Although the example of a single unit (weight) has been described above, an example in which the present invention is applied to a plurality of weights will be described next.

FIG. 8 is a drive block diagram showing an example in which the present invention is applied to a plurality of weights.

[0062] As shown in FIG. 8, the driving circuit 80, co <br/> communication via a DC bus 83 each DC brushless motor 5a, a plurality of drive circuits 30a provided for each 5b ..., the 30b ... The rectifier circuit 81 is connected. Further, a motion controller 82 is provided as a control device connected to the drive circuits 30a, 30b ... The motion controller 82 controls at least some of the DC brushless motors 5a, 5b ... In such a manner that the forward and reverse drive phases are different.

Although not shown in the figure, the yarn winding machine is constructed by arranging a plurality of weights in parallel, and one winding package 11 and traverse device 1 described in FIG. 1 are provided for each weight.
Is provided. The traverse device 1 for each weight has its own drive motor (DC brushless motors 5a, 5b).
...).

When the present invention is applied to a plurality of weights, power consumption can be reduced. By the control device, for example, straight certain weight
Other weights are flow brushless motor during deceleration DC brushless
By Sumota is controlled to be in the acceleration, straight other weight via a DC bus 83 to <br/> regenerative power RP of the common from the DC brushless motor of a weight caused by the reduction
Flow brushless motor can be consumed. Straight of whole weight
When the brushless motors decelerate all at once, the regenerative power RP
As a result, the bus voltage 83 rises and is consumed by the resistor for discharging regenerative power, but according to the present invention, such useless power consumption can be suppressed.

Here, the control of the forward / reverse drive phase of the DC brushless motor between the two spindles will be described.

FIG. 9 shows an example of control of the forward / reverse drive phase of the DC brushless motor between the two spindles, with the horizontal axis representing time (t).
2 is a schematic diagram in which the vertical axis represents the rotation speed (v) of the motor. In the figure, the velocity curve of the first weight on the upper side is a _1, and the velocity curve of the second weight on the lower side is a ₂ . Speaking the velocity curve as a ₁ , the time 0 to the time t ₈ corresponds to one traverse, the time 0 to the time t ₄ indicates the traverse to either the left or the right, and the time t
₄ to time t ₈ indicates the traverse in the other direction. For both the speed curve a ₁ and the speed curve a ₂ ,
The constant speed period is between the acceleration period and the deceleration period.

As shown in FIG. 9, in the speed curve a ₂ , the deceleration period is from time 0 to time t ₁ , and the regenerative electric power RP is generated from the DC brushless motor 5b of the second spindle. On the other hand, in the speed curve a ₁ , from time 0 to time t ₁ is the acceleration period, during which the DC brushless motor 5b of the second spindle is driven.
The regenerated electric power RP generated from the DC brushless motor 5a of the first spindle is consumed via the DC bus 83. By also performing the same from the time t ₄ to the time t ₅ , the regenerated power RP can be effectively used twice per traverse, so that the power consumption can be suppressed.

Even in the case of a plurality of weights, if the phases of the acceleration / deceleration periods of the respective weights are appropriately shifted as described above, the regenerative electric power at the time of deceleration can be consumed by other accelerating weights.

In the figure, the velocity curve a ₁ and the velocity curve a ₂
In the example, and are drawn with a substantially rectangular curve, the speed change at the transition between the constant velocity period and the acceleration / deceleration period is smoothed (the rectangular portion of the velocity curve is made into a smooth curved portion), It is possible to prevent the tension of the yarn from fluctuating due to various speed fluctuations. This also applies to each velocity curve in the case of a plurality of weights.

According to the present invention, the drive motor is a DC brushless motor, which enables high-speed operation. This leads to the fact that the traverse device 1 can be realized with the drive pulley 6 having a small diameter, which cannot be realized by the stepping motor. In other words, the motor can be rotated forward and backward at high speed, and the device can be reduced in size by rotating a large number of pulleys to traverse them. Further, by using the DC brushless motor, since the motor current and the output torque are in a proportional relationship, the belt condition can be monitored. In the case of a brushless motor, regenerative power can be easily obtained during deceleration in forward / reverse operation, so an energy saving effect can also be obtained.

[0071]

As is apparent from the above description,
According to the present invention, the following excellent effects are exhibited.

(1) Since high speed operation is possible and the drive wheels (drive pulleys) can be downsized, the inertia of the rotating body can be reduced and the position feedback control can be performed for highly accurate positioning in high speed operation. Therefore, even when performing high-speed traverse, highly accurate positioning control of the traverse guide can be performed, and it is possible to manufacture a take-up package having a good unwinding property by preventing ear height, ribbon winding, and the like. Further, since there is almost no vibration during rotation, better winding can be performed. Since the current value and torque are in a proportional relationship,
The motor load (torque) can be monitored from the current value. The traverse guide can be satisfactorily braked at the traverse end portion by utilizing the regenerated electric power that can be easily taken out.

Further , the control unit controls the detection signal of the rotation detector.
Feedback of DC brushless motor based on
By controlling the DC brushless motor
DC bra according to rotational position (position of traverse guide)
The current of the series motor is controlled. For this current control
The current value is detected by the current detector, and the current value is controlled.
The current value detected by the current detector
And the output torque of the DC brushless motor are proportional
Therefore, the output torque (load) of the DC brushless motor
Since the abnormality can be detected , the belt state can be monitored based on the change in the current value. For example, it is possible to detect quickly and reliably that the drive belt body is cut.

[0074]

[0075]

[0076]

( 2 ) The power consumption can be reduced. To control device
Therefore, for example, while the DC brushless motor of one weight is decelerating, the DC brushless motor of another weight is accelerating.
In this way, the regenerative power generated by deceleration is controlled by the DC brushless motor of other weights via the common DC bus.
It can be consumed by the other. DC brushless motor for all weights
When the power is decelerated all at once, the bus voltage rises due to the regenerative power and is consumed by the resistor for discharging the regenerative power. According to the present invention, such useless power consumption can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic view showing a preferred embodiment of the present invention.

FIG. 2 is a sectional view of a DC brushless motor according to the present invention.

FIG. 3 is a circuit diagram showing a connection relationship of a DC brushless motor, a drive circuit, and a control device (controller) according to the present invention.

FIG. 4 is a circuit diagram in which the circuit shown in FIG. 3 is simplified.

FIG. 5 is a block diagram for driving a DC brushless motor according to the present invention (when performing highly accurate position control).

FIG. 6 is a block diagram showing an example of control by a controller of the drive circuit shown in FIG.

FIG. 7 is an example of a driving block diagram of a DC brushless motor according to the present invention.

FIG. 8 is a drive block diagram showing an example in which the present invention is applied to a plurality of weights.

FIG. 9 is a schematic diagram showing an example of control of forward and reverse drive phases of a DC brushless motor between two spindles.

FIG. 10 is a schematic view of a conventional traverse device.

[Explanation of symbols]

1 Traverse device 2 drive belt body 4 Traverse guide 5 DC brushless motor

Continuation of the front page (56) Reference JP-A-7-125918 (JP, A) JP-A-5-51169 (JP, A) Registered utility model 3014403 (JP, U) (58) Fields investigated (Int.Cl) . ^7, DB name) B65H 54/28

Claims (2)

(57) [Claims] 1. In a traverse device that traverses a yarn by reciprocally moving a traverse guide attached to a drive belt body by driving the drive belt body forward and reverse, a direct current that drives the drive belt body forward and reverse. Brushless motor, rotation detector for detecting rotational position of the DC brushless motor, current flowing in the DC brushless motor
Comprising a current detector for detecting a value, and a control device for performing position feedback control of the DC brushless motor based on the detection signal of the rotation detector, the controller, test by the current detector
Of the DC brushless motor, which is in proportion to the output current value
Determine the abnormality of the drive belt based on the change in output torque
Traverse device characterized by performing . 2. A DC buoy for each of a plurality of weights constituting the yarn winding machine.
Each brushless motor is equipped with a DC brushless motor.
To a plurality of drive circuits provided for each
A regular rectifier circuit is connected, and the control device
The drive circuit takes out the regenerative power generated by the rackless motor
Then, with the DC brushless motor of the other weight through the DC bus
A DC brushless motor of a certain weight decelerates to consume
Inside, the DC brushless motor of the other weight is accelerating.
As a positive of at least some DC brushless motors
The traverse device according to claim 1, wherein the traverse device is controlled such that the reverse drive phases are different .