JP2002115126A - Single spindle driving system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single spindle driving system of simple construction enabling a specific driver to be exchanged without halting the system as a whole. SOLUTION: This single spindle driving system has such a scheme that each single spindle driving unit U is equipped with a motor 5, which, in turn, is equipped with a motor driver circuit 3b, and driving power is supplied from a common three-phase power line 1 via the motor driver circuit 3b to the individual motor 5; wherein each of the motor driver circuits 3b is mounted with a non-contact power supply unit 3a composed of a primary side coil unit LU1 and secondary side coil unit LU2. This driving system works as follows: non- contact power supply is performed from the power line 1 to the respective driver circuits 3b by making use of the electromagnetic inductive action between two coils L1 and L2, thereby a trouble object in a specific driver circuit 3b can be exchanged with a simple construction without halting the system as a whole and also without providing any inhibitory circuit against inrush current.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an individual motor provided for each weight and a plurality of motor drivers provided for one individual motor or a plurality of individual motors, and is provided along a machine base. And a single spindle drive system for supplying drive power to each individual motor from a common transmission line via a motor driver.

[0002]

2. Description of the Related Art For example, in a single-spindle drive system in which a number of units are arranged side by side and a drive motor is provided for each unit and a driver circuit is provided for each motor or for each of a plurality of motors, a common three-phase transmission line is used. Thus, the three-phase AC power is supplied by branching and directly connecting each of the driver circuits with three branch lines. In some cases, DC power is supplied using two of the three-phase transmission lines.

In the above-mentioned driver, a three-phase AC input is rectified and smoothed to a DC output, and the DC output is converted to an AC and supplied to a motor to control the rotation speed of the motor.

[0004]

If one driver fails and the driver circuit needs to be replaced, the entire system is temporarily stopped and the system power is turned off.
In this case, the driver must be replaced after the state described above, so that a normally operating unit must be stopped.

[0005] Further, even if it is possible to replace only a failed part while driving the system,
During replacement, the driver circuit and the transmission line may be disconnected and connected, and an inrush current may flow through the driver circuit. Therefore, it is necessary to separately provide a circuit or the like for suppressing the generation of the rush current, and the configuration is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a single spindle drive system capable of replacing a specific driver with a simple configuration without stopping the entire system. .

[0007]

In order to achieve the above object, the invention according to claim 1 comprises an individual motor provided for each weight and a plurality of motors provided for one individual motor or a plurality of individual motors. A single spindle drive system that supplies driving power to each individual motor via a motor driver from a common transmission line provided along the machine base, wherein the motor driver and the transmission line And a non-contact power supply unit including a primary coil unit and a secondary coil unit.
According to the present invention, the primary coil is connected to the transmission line and the secondary coil is connected to the driver circuit, so that non-contact from the transmission line to the driver circuit is performed by utilizing the electromagnetic induction between the two coils. Power supply can be realized.

According to a second aspect of the present invention, the motor driver is connected to a secondary coil of a secondary coil unit, and the secondary coil unit is configured to be detachable from the primary coil unit. It is characterized by that. According to the present invention, when the motor driver is replaced, the secondary coil unit is detached from the primary coil unit, so that the electromagnetic coupling due to the electromagnetic induction action is interrupted, and the power supply to the motor driver can be stopped.

According to a third aspect of the present invention, the transmission line is a three-phase AC transmission line, and the single-phase transmission line is branched from the three-phase AC transmission line for each non-contact power supply unit to form the single-phase transmission line. A drive power is supplied to the individual motor via the transmission line and the non-contact power supply unit, and the number of combinations of phases for branching two transmission lines out of the three-phase transmission line is substantially the same. It is characterized by. According to the present invention, for all motor drivers connected to a common three-phase AC power transmission line, the current branched from the three-phase AC power transmission line and flowing to each motor driver is equally divided, thereby improving the efficiency due to the unbalanced current. Can be prevented from decreasing.

According to a fourth aspect of the present invention, the primary coil and the secondary coil constituting the non-contact power feeding unit are covered with a non-conductive member.
According to the present invention, in particular, it is possible to prevent the worker from directly contacting the energized coil when the motor driver circuit is replaced or the like.

According to a fifth aspect of the present invention, a concave portion is formed on one of the primary coil unit and the secondary coil unit, and the convex portion formed on the other coil unit or the other coil unit is different from the primary coil unit. A separate positioning member is engaged with the concave portion to position both coil units in a predetermined relationship. According to the present invention, the positional relationship between the primary coil and the secondary coil deviates from a predetermined position, the magnetic coupling between the two coils changes due to the electromagnetic induction action, and is supplied to the secondary coil and the driver. It is possible to prevent the electric power from changing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments unless it departs from the gist of the present invention.

FIG. 1 is a diagram showing a single spindle driving system according to an embodiment of the present invention. FIG. 2 shows the non-contact power supply unit 3a of FIG.
FIG. FIG. 3 is a circuit diagram showing a configuration of the motor driver circuit 3b of FIG. 4 and 5 are views showing a modification of the non-contact power supply unit 3a. FIG. 6 is a side view showing a unit WU of the multiple twisting machine according to the single spindle drive system of the embodiment of the present invention.

In the single spindle drive system of the present invention, as shown in FIG. 1, a large number of single spindle drive units U each having a motor 5 and a motor driver circuit 3b are provided in parallel, and are laid along the machine base longitudinal direction. The common three-phase AC transmission line 1 includes three transmission lines, and each transmission line is supplied with AC power having a phase difference of 120 °. A single-phase power transmission line 2 is branched from a three-phase AC transmission line 1 so as to correspond to each single-mass drive unit U, and power is supplied to each single-mass drive unit U via the single-phase power transmission line 2. Is done. The motor driver circuits 3b and the single-spindle drive units U are arranged at appropriate intervals in the machine base longitudinal direction.

Further, as shown in FIG.
Receives two or more transmission lines from the three-phase AC transmission line 1 and branches the single-phase power transmission line 2 so as to receive single-phase power. Here, for example, the leftmost unit 2
In the three-phase AC transmission line 1 from the u and v phases, the second unit U from the left from the u and w phases, and the third unit U from the left from the v and w phases. I have. Furthermore,
In the same manner as described above, the unit U from the left, which branches two of the three-phase power transmission lines 1, is connected regularly while repeating the combination so as not to be biased to specific two phases. In other words, the phases connecting the single-phase AC power transmission lines 2 in the three-phase AC power transmission line 1 are separated substantially uniformly in the longitudinal direction, and two of the three-phase AC power transmission lines 1 have the single-phase AC power transmission line 2. Are approximately the same in number of combinations of phases for branching.

If the number of connections to the phases u, v, and w of the transmission line 2 is biased, an unbalanced current is generated and the efficiency of the entire system is reduced. In order to prevent this, it is necessary to perform wiring as described above and to divide the current evenly. Of course, as described above, it is not necessary to perform wiring so that the combination of phases is regularly repeated in the machine longitudinal direction (the left-right direction in FIG. 1).

The single-phase power transmission line 2 is connected to a primary coil L1 constituting a non-contact power supply unit 3a.
The non-contact power supply unit 3a mainly includes the primary coil L1 and the secondary coil L2. The coil L
2 is connected to the motor 5 via the motor driver circuit 3b.

As shown in FIG. 2, the structure of the non-contact power supply unit 3a is such that its cross-section is in the shape of the letter E on the primary side, and the primary side coil L1 is wound around the outer periphery of the central projection. A primary-side coil unit LU1 having a turned cylindrical core 4a; a cross-section having a substantially similar shape to the core 4a on the secondary side;
The secondary coil unit LU2 having the cylindrical core 4b around which the secondary coil L2 is wound is disposed so as to face each other across the gap g1. Each core 4
Reference numerals a and 4b denote cylindrical casings 6 and 7 whose outer circumferences are respectively covered. A positioning pin 8 corresponding to a projection projects from one casing 6, and a positioning pin 8 can be engaged with the other casing 7. A hole 9 corresponding to the concave portion is formed. The engagement between the positioning pins 8 and the holes 9 causes the casing 6 and the casing 7 to have a predetermined positional relationship (a direction in which the cores 4a and 4b accurately oppose each other in a non-contact state).
It is positioned so that For details, insert the pin 8 into the hole 9
When it is fitted to the, positioning is performed so as to be symmetrical with respect to the gap g1 as shown while forming the gap g1. The cores 4a and 4b and the casing 6,
Each of the reference numerals 7 has a coaxial concentric arrangement centered on a line indicated by a chain line.

Further, the exposed surfaces of the cores 4a and 4b which are not covered by the casings 6 and 7 are non-conductive members 10, 1
1 (molded). The non-conductive member 1
Materials used for 0 and 11 include thin-film resins (vinyl, nylon, plastic, etc.).

When a current flows from the three-phase AC transmission line 1 of FIG. 1 to the primary coil L1 via the single-phase power transmission line 2, FIG.
Across the gap g1 as shown in FIG.
A magnetic flux φ passing through the central axes of the coils L1 and L2 along the concave portion is generated in 4b (the magnetic flux changes). Due to the generation (change) of this magnetic flux φ, an electromagnetic induction action works,
An induced electromotive force is generated in the secondary coil L2. Therefore, 2
The secondary coil L2 acts as a pickup coil, and power is supplied from the primary side to the secondary side in a non-contact state via the gap g1.

In FIG. 1, the specific configuration of the motor driver circuit 3b provided on the secondary side is as shown in FIG. The induced electromotive force generated in the secondary coil L2 is AC power, and the resulting power is full-wave rectified by the rectification unit D, and the full-wave rectified output is connected to the rectification unit D in parallel with the smoothed output. It is smoothed by the electrolytic capacitor C and converted into a DC output. Further, an inverter unit INV is provided, and the inverter unit INV converts the DC output into a three-phase AC output and supplies it to the motor 5.

In the motor driver circuit 3b, DC /
The DC / DC converter 1 includes a DC converter 12 and a central processing unit (CPU) 13 as central control means.
Numeral 2 converts the rectified and smoothed high DC output into a low voltage that can be used as a power supply for the CPU 13 and supplies the low voltage to the CPU 13. By controlling the inverter INV in accordance with a command from the CPU 13, the motor 5
The rotation speed of each motor 5 is individually controlled by adjusting the output supplied to the motor. However, in this embodiment, the motor driver circuit 3b is provided for each motor 5 (unit U).
However, the circuit 3b may be provided for each of the plurality of motors 5 (unit U).

When a trouble such as a failure occurs in the motor driver circuit 3b in one of the plurality of units U shown in FIG. 1, the operator operates the motor driver circuit 3b with the trouble. Need to be replaced. Therefore, in order to disconnect the motor driver circuit 3b, the operator releases the engagement between the positioning pin 8 of the casing 6 shown in FIG. 2 and the hole 9 of the casing 7, and connects the secondary coil unit LU2 to the secondary coil unit. Remove from LU1. At this time, since the distance between the primary coil L1 of the core 4a and the secondary coil L2 of the core 4b is large, the electromagnetic induction to the secondary coil L2 by the magnetic flux φ generated by the current flowing through the primary coil L1. No effect occurs. As a result, the electromagnetic coupling between the primary coil L1 and the secondary coil L2 is interrupted, so that the secondary circuit (in this embodiment, includes the secondary coil L2, the motor driver circuit 3b, and the motor 5). The power supply to is stopped.

Since the exposed surfaces of the cores 4a and 4b are molded with the non-conductive members 11 and 12, when replacing the circuit 3b, an operator can work without directly contacting the coils L1 and L2. It can be carried out. Further, it is possible to prevent lint, fly waste and the like handled by the textile machine from adhering to the coils L1 and L2.

In FIG. 1, replacement of the driver circuit 3b with the above trouble can be performed in a state where power is continuously supplied from the three-phase AC transmission line 1 to the other units U in FIG. This is because the power supply to the secondary side circuit is performed between the non-contact primary side coil L1 and the secondary side coil (pickup coil) L2 as described above, and when the driver circuit 3b is replaced, Motor driver circuit 3
This is possible because no inrush current flows through b.

Next, a modification of the non-contact power supply unit 3a will be described with reference to FIG. The illustrated non-contact power supply unit 10
3a is composed of a primary side coil unit LU1a and a secondary side coil unit LU2a. Primary side coil unit L
U1a is a cylindrical casing 106 in which a cross-section has a T-shape of an alphabet, and a core 104a around which a primary-side coil L1 is wound is attached to the outer periphery of a central cylindrical protrusion.
And a non-conductive member 110 having a shape conforming to the shape of the convex portion of the core 104a. The secondary coil unit LU2a has a core 104b having a shape conforming to the shape of the non-conductive member 110, and an outer periphery. , A bobbin 108 made of a non-conductive material wound with a secondary coil L2, a U-shaped cross section, a core 104B provided so as to cover the bobbin 108 from outside, and the core 104B It has a laminated structure in which the covering casings 107 are sequentially stacked. The cores 104a, 104b, 104B, the casings 106, 107, and the bobbin 108 are all coaxially arranged around a line indicated by a dashed line.

As described above, the core 104a and the core 104
By interposing a non-conductive member 110 matching the shapes of the cores 104a and 104b between the core and the core b, the positioning can be performed while forming the gap g2. Become.

Next, the non-contact power supply unit 20 shown in FIG.
3a includes a primary coil unit LU1b and a secondary coil unit LU2b. Primary side coil unit L
U1b is a cylindrical casing 2 having a hollow portion 209.
06, a bobbin 205 made of a non-conductive material with a secondary coil L2 wound around a core 204a having a hollow cylindrical shape and an L-shaped cross section, and a core covering above the bobbin 205 204A, and the secondary coil unit LU2b is a hollow cylindrical core 2 around which the secondary coil L2 is wound along the outer peripheral surface.
04b.

Further, a primary coil L1 and a secondary coil L
When the hollow cylindrical core 204b is fitted to the inner periphery of the primary coil unit LU1b so that
A positioning pin 208 is provided which can be engaged with the hollow portion 209 of the casing 206 through the hollow portion of the core 204b so that the secondary coil unit LU2b and the primary coil unit LU1b are concentric. By this positioning, a gap g3 is formed between the primary side and the secondary side, and the primary side coil unit LU1b and the secondary side coil unit LU2b are positioned in a predetermined positional relationship. The exposed surface of the primary side is molded by a non-conductive member 210, and the exposed surfaces of the secondary coil L and the core 204b are molded by a non-conductive member 211, respectively.

With the above configuration, the positioning on the secondary side is performed at the concentric circle indicated by the dashed line, so that one positioning pin and one
Positioning can be performed only by the hollow portion 209 at the location.

In FIG. 4, when a current flows through each of the primary side coils L1, the magnetic flux .phi.
It occurs across the non-conductive member 110, the core 104b, and the bobbin 108 and passes through the core 104B. FIG.
Also, as shown in the figure, it occurs through the cores 204a and 204b, and across the core 204A and the gap g3.

Here, the values of the gaps g1 to g3 are set to 0.3 mm to 0.3 mm in consideration of the magnetic permeability of air so that electromagnetic induction by generation (change) of the magnetic flux φ is properly performed.
It is preferably about 0.5 mm.

Next, referring to FIG. 6, a description will be given of a multi-twisting machine, which is a kind of textile machine, which is one of application examples of the motor 5 according to the embodiment of the present invention.

A multiple twisting machine including a double twisting machine is one in which a number of twisting and winding units WU shown in FIG. 6 are arranged in parallel with the motor 5 in FIG. 1, and a winding drum 23 and a traverse guide 22 are Although driven by a common motor (not shown), in particular, in this example, the rotation of the spindle 16 is performed by the motors 5 provided separately for each unit WU.

In FIG. 6, the twisting / winding unit WU of the double twisting machine is provided with a tensor box 15 which is mounted at the center of the yarn supply package 14, and a tensor box 1 is provided.
The spindle 16, the rotary disk 17, and the drive motor 5 are disposed below the rotary disk 17. The fryer 18 is located above the yarn supply package 14 and is provided rotatably about the axis of the tensor box 15. Above the yarn supply package 14, that is, downstream of the yarn Y travel path, a balloon guide 19 is provided, and downstream of the balloon guide 19, two guide rollers 20a and 20b, which are yarn path regulating members, are provided. Guide roller 2
0b, the feed roller 21 is located in front of the work passage, the traverse guide 22 is located downstream of the feed roller 21, and the winding drum 23 and the winding package P are located downstream of the traverse guide 22. It is provided to be in pressure contact. Further, the winding package P is configured such that a cradle 24 is rotatably supported on a shaft.

The yarn Y unwound from the package P in the stationary state enters the tensor box 15 and the tension is applied to the yarn Y by rotating the rotating disk 17 together with the spindle 16 by the rotation of the motor 5 to rotate the yarn Y. The balloon guide 19 is made to balloon. In addition, thread Y
Is twisted once from the tensor box 15 to the rotating disk 17, and once more from the rotating disk 17 to the balloon guide 19. That is, two twists are applied to the yarn Y by one rotation of the rotary disk 17.

The winding package P is rotatably supported by the cradle 24. The winding drum 23 is pressed against the winding package P, so that the yarn Y twisted twice is twisted. The balloon guide 19 is wound around the winding package P while being traversed by the traverse guide 22 via the guide rollers 20a and 20b and the feed roller 21.

Here, since the frequency used in the three-phase power transmission line 1 of FIG. 1 used in this embodiment has a relatively small capacity (about 100 W), it is 50/60 of the commercial power frequency.
Hz. Therefore, since a higher power frequency is not required as compared with the above-mentioned frequency, a non-contact power supply unit 3a shown in FIG. 1 having a smaller capacity can be used. Further, the single spindle drive system according to the present invention may be applied to a spindle motor for rotating a spinning bobbin of a ring spinning machine with substantially the same power capacity as the multiple twisting machine.
As the individual motor 5, a DC brushless motor with high power efficiency is used.

[0039]

The present invention is configured as described above.
The following effects are obtained.

According to the first aspect of the present invention, there are provided an individual motor provided for each weight and a plurality of motor drivers provided for one individual motor or a plurality of individual motors,
A single-spindle drive system for supplying driving power to each individual motor via a motor driver from a common transmission line provided along a machine base, wherein a primary side is provided between the motor driver and the transmission line. By providing a non-contact power supply unit composed of a coil unit and a secondary side coil unit, utilizing an electromagnetic induction effect between two coils,
Non-contact power supply from the transmission line to the driver circuit can be realized.

According to the second aspect of the present invention, the motor driver is connected to the secondary coil of the secondary coil unit, and the secondary coil unit is detachably attached to the primary coil unit. With this configuration, a specific driver can be replaced with a simple configuration without stopping the entire system and without providing a circuit for suppressing the occurrence of an inrush current.

According to the third aspect of the present invention, the transmission line is a three-phase AC transmission line, and a single-phase transmission line is branched from the three-phase AC transmission line for each non-contact power supply unit. A single-phase transmission line and a drive power are supplied to the individual motor via the non-contact power supply unit, and the number of combinations of phases for branching two transmission lines out of the three-phase transmission lines is substantially the same. By doing so, for all the motor drivers connected to the common three-phase AC power transmission line, the current branched from the three-phase AC power transmission line and flowing to each motor driver is equally divided, so that the efficiency due to the unbalanced current is reduced. The drop can be prevented.

According to the fourth aspect of the present invention, the primary coil and the secondary coil constituting the non-contact power supply unit are covered with a non-conductive member, so that the primary coil and the secondary coil can be replaced when the motor driver circuit is replaced. For example, it is possible to prevent the worker from directly contacting the coil to be energized, so that the work can be easily performed.

According to the fifth aspect of the present invention, a concave portion is formed in one of the primary coil unit and the secondary coil unit, and a convex portion formed in the other coil unit or the other coil unit is formed. A separate positioning member is engaged with the concave portion to position the two coil units in a predetermined relationship, so that the positional relationship between the primary coil and the secondary coil deviates from a predetermined position, thereby causing electromagnetic induction. It is possible to prevent a change in magnetic coupling between the two coils due to the action and a change in power supplied to the secondary coil and the driver circuit.

[Brief description of the drawings]

FIG. 1 is a diagram showing a single weight drive system according to an embodiment of the present invention.

FIG. 2 is a side view showing the wireless power supply unit of FIG. 1;

FIG. 3 is a circuit diagram illustrating a configuration of a motor driver circuit of FIG. 1;

FIG. 4 is a view showing a modification of the non-contact power supply unit.

FIG. 5 is a diagram showing a modification of the non-contact power supply unit.

FIG. 6 is a side view showing a unit of the multiple twisting machine according to the single spindle drive system of the embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 3-phase power transmission line 2 Single-phase power transmission line 3a Non-contact power supply unit 3b Motor driver circuit 5 Motor 10, 11, 110, 210, 211 Non-conductive member positioning pin 8, 208 Positioning pin LU1, LU1a, LU1b Primary Side coil unit LU2, LU2a, LU2b Secondary side coil unit

Claims (5)

[Claims] An electric motor provided for each weight and a plurality of motor drivers provided for one individual motor or for a plurality of individual motors, wherein a common transmission line provided along the machine base is provided. A single-spindle drive system for supplying drive power to each individual motor via a motor driver, comprising a primary coil unit and a secondary coil unit between the motor driver and a transmission line. A single weight drive system comprising a contact power supply unit. 2. The motor driver according to claim 1, wherein the motor driver is connected to a secondary coil of the secondary coil unit, and the secondary coil unit is configured to be detachable from the primary coil unit. Single spindle drive system. 3. The power transmission line is a three-phase AC power transmission line, and a single-phase power transmission line is branched from the three-phase AC power transmission line for each non-contact power supply unit. The power supply unit supplies drive power to the individual motors via a power supply unit, wherein the number of combinations of phases for branching two transmission lines out of the three-phase transmission lines is substantially the same. Single spindle drive system. 4. The single spindle drive system according to claim 1, wherein the primary coil and the secondary coil constituting the non-contact power supply unit are covered with a non-conductive member. . 5. A concave part is formed in one of the primary coil unit and the secondary coil unit, and a convex part formed in the other coil unit or a positioning member separate from the other coil unit is provided. The single weight drive system according to any one of claims 2 to 4, wherein the two coil units are positioned in a predetermined relationship by engaging with the recess.