JPH1092662A - Variable reactor control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable reactor control device which enables setting of accurate inductance. SOLUTION: In a variable reactor control device, a conductor 4 screwed to a screw shaft 7 rotated by rotation of a pulse motor 6 is inserted into a coil 2 wound on an outer circumference of an insulation tube 3 and desired inductance is set by an insertion amount. A data base 15 of a relationship between an insertion amount (the number of pulses) and inductance, a setting means 18 for setting a fixed movement amount (the number of pulses) and a storage means 17 for storing a current inductance value are provided to a sequencer 14. A difference between a set value and a current value of a desired inductance value setting means 16 is obtained by an operation processing means 19, and a fixed movement amount is added to the difference to either a set value which is larger or smaller than a current value and the conductor 4 is moved. Than, it is moved to a reverse direction by the fixed movement amount and is set at the desired inductance value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable reactor control device.

[0002]

2. Description of the Related Art Among variable reactors, there is a variable reactor in which a conductive canceling cylinder made of aluminum or the like is inserted into a coil, and the inductance is adjusted according to the insertion amount. FIG.
Is a sectional view showing the configuration of such a variable reactor,
The upper part of the insulating cylinder 3 is a coil bobbin 1, and the coil bobbin 1
A collar 1a is formed integrally with the upper end of the coil frame, and a collar 1b is formed integrally with the lower end. A coil 2 is wound around the outer peripheral surface of the coil bobbin 1.

[0003] Inside the insulating cylinder 3, a cylindrical canceling cylinder 4 formed of a conductor such as aluminum is screwed to a screw shaft 7. One end of the screw shaft 7 is rotatably supported on the lower surface of the collar 1 a of the coil winding frame 1, and the other end is a rotating shaft 6 of a motor 6 mounted on the mounting base 5.
a.

[0004] The inductance of the variable reactor thus configured is set by driving a motor 6 to rotate a screw shaft 7 by a control device (not shown) so that the canceling cylinder 4 is moved along the inner peripheral surface of the insulating cylinder 3. As shown by the arrow A, this is performed by moving up and down to adjust the facing area between the canceling cylinder 4 and the coil 2.

For example, if the desired inductance value (target value) is smaller than the current value (current value), the motor 6 is driven to rotate the screw shaft 7 in a counterclockwise direction, and the cancel cylinder 4 is moved upward. , And cancel cylinder 4 and coil 2
And the secondary short circuit of the coil 2 is increased to set the target value. Conversely, if the target value is larger than the current value, the motor 6 is driven to rotate the screw shaft 7 clockwise to move the canceling cylinder 4 downward, thereby reducing the facing area between the canceling cylinder 4 and the coil 2. Less, 2 of coil 2
The target value is set by reducing the next short circuit.

[0006]

However, as described above, the screw shaft 7 is rotated clockwise or counterclockwise to move the canceling cylinder 4 in the direction of decreasing the inductance and in the direction of increasing the inductance. In the setting of the inductance, the canceling cylinder 4 is screwed to the screw shaft 7 and there is play in the screwed portion. Therefore, the canceling cylinder 4 is moved in the decreasing direction to be positioned, and is moved in the increasing direction. There is a problem that an accurate desired inductance cannot be obtained because the play position is different from the case where positioning is performed.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a variable reactor control device capable of setting an accurate inductance.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a variable reactor control device in which a target inductance is set by controlling an amount of a conductor inserted into a coil, wherein the target inductance is smaller than a current inductance. The variable reactor control device is characterized in that the conductor is set to the target value inductance by moving the conductor in any one of the increasing direction and the decreasing direction of the inductance.

According to the above feature of the present invention, since the setting of the target value inductance is performed by moving the conductor from one direction, the conductor is screwed to the screw shaft and moves by the rotation of the screw shaft. , The target value inductance due to the play of the threaded portion is eliminated, and an accurate target value inductance can always be obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 is a block circuit diagram illustrating a configuration of a variable reactor control device according to an embodiment of the present invention. The variable reactor 11 shown in FIG. 1 has the same configuration as the variable reactor described with reference to FIG. 2, and is denoted by the same reference numerals and description thereof is omitted.

The motor 6 for rotating the screw shaft 7 for moving the canceling cylinder (conductor) 4 of the variable reactor 11 comprises:
It consists of a pulse motor (stepping motor).
As shown in (1), the pulse output from the pulse oscillator 13 is driven to rotate in the direction of decreasing inductance (clockwise) or in the direction of increasing inductance (counterclockwise) through the motor drive circuit 12 to rotate the screw shaft 7. Conductor 4
To move.

The pulse oscillator 13 receives a clockwise or counterclockwise command from the sequencer 14 and the number of pulses to be driven, and outputs the number of pulses in the direction corresponding to the command. As a result, the amount of the conductor 4 corresponding to the number of pulses moves, and the amount of movement of the conductor 4, that is, the inductance changes by the change in the facing area between the conductor 4 and the coil 2.

The sequencer 14 sets the number of pulses to zero when the facing area between the conductor 4 and the coil 2 is zero, that is, when the inductance is at a maximum value. The relationship between the increase in the facing area of the conductor 4 and the coil 2 due to the increase in the inductance and the decrease in the inductance is measured or calculated in advance, and the database 15 of the inductance value corresponding to the number of pulses obtained thereby is obtained.
And a storage means 17 for storing the number of pulses corresponding to the current value of the inductance, a number-of-pulses setting means 18 for setting a constant number of pulses, and an arithmetic processing means 19. In FIG. 1, reference numeral 16 denotes target value inductance setting means, and reference numeral 20 denotes display means for displaying the current value inductance and the number of pulses corresponding to the inductance.

The arithmetic processing means 19 inputs the target value inductance set by the target value inductance setting means 16 for setting a desired inductance value, reads out the number of pulses corresponding to the target value inductance from the database 15, and reads the number. The difference between the number of pulses and the number of pulses corresponding to the current value inductance stored in the storage means 17 is calculated.

When the difference is negative, for example, when the target value inductance is larger than the current value inductance, the pulse number preset by the pulse number setting means 18 is added to the absolute value of the pulse number of the difference, and the added pulse is added. After the number of pulses and the rotation command in the counterclockwise direction are output to the pulse generator 13, and the rotation of the pulse number is executed, the clockwise rotation command and the pulse number preset by the pulse number setting means 18 are converted into the pulse oscillator 13. Output to As a result, the target value inductance is set.

For example, the conductor 4 is inserted into the coil 2 up to the position A shown by the dotted line in FIG. 1, and the inductance at that time, that is, the number of pulses stored in the storage means 17 with the current value inductance of 5 μH, That is, assuming that the number of pulses at that position is 2000 pulses and the number of pulses set in the pulse number setting means 18 is 7 μH in the target value inductance setting means 16, the number of pulses corresponds to 7 μH and the current value inductance corresponds to 5 μH. The difference -1000 from the pulse number 2000 is calculated, and the pulse number setting means 18 sets the pulse number to 1000 due to the negative sign.
The pulse number 1100 is added to obtain a pulse number 1100, and a counterclockwise command based on the negative pulse number and the sign of the 1100 is output to the pulse oscillator 13 to increase the inductance of the conductor 4 by the pulse number 1100. Move in the direction.

After the conductor 4 has moved by the number of 1100 pulses, a rotation command in the clockwise direction and the number of pulses 100 of the pulse number setting means 18 are output to the pulse oscillator 13, and the number of pulses 1
The conductor 4 is moved in the direction of decreasing the inductance by 00 minutes, the conductor 4 is positioned at a position (B in FIG. 1) where the target inductance can be obtained, and the target value inductance is set.

When the difference is positive, that is, when the target value inductance is smaller than the current value inductance, a pulse number of the difference and a clockwise rotation command are output to the pulse oscillator 13.

For example, the conductor 4 is inserted into the coil 2 up to the position A indicated by the dotted line in FIG. 1, the current value inductance is 5 μH, and the number of pulses stored in the storage means 17 is 2000 pulses. When 3 μH is set in the setting means 16, the difference +1000 between the number of pulses 3000 corresponding to 3 μH and the number of pulses 2000 corresponding to the current inductance of 5 μH is calculated, and the clockwise command by the positive sign and the 1000 pulse number are calculated. Output to the pulse oscillator 13, move the conductor 4 in the direction of decreasing the inductance by 1,000 pulses, position the conductor 4 at the position where the target inductance can be obtained (C in FIG. 1), and set the target value inductance. I do. In this case, the pulse number preset by the pulse number setting means 18 is not added.

In this embodiment, when the target value inductance is larger than the current value inductance, a predetermined fixed number of pulses are added, and the conductor is once passed through the position where the target value inductance can be obtained. When the target value inductance is smaller than the current value inductance, the conductor is once passed through the position where the target value inductance is obtained. The positioning may be performed by moving toward the position where the target value inductance is obtained. The number of pulses preset in the pulse number setting means may be appropriate.

[0021]

As described in detail above, according to the present invention,
Since the setting of the target value inductance is determined by moving the conductor from one direction, even if the conductor is screwed to the screw shaft and configured to move by the rotation of the screw shaft, it is easily accurate and precise. It can be set to a desired target value inductance.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing a configuration of a variable reactor control device according to the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a variable reactor.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 coil winding frame 2 coil 3 insulating cylinder 4 conductive canceling cylinder (conductor) 6 motor 7 screw shaft 11 variable reactor 12 motor drive circuit 13 pulse oscillator 14 sequencer 15 database 16 target value inductance setting means 17 storage means 18 pulse number setting Means 19 Operation processing means 20 Display means

Claims (1)

[Claims] 1. A variable reactor control device in which a target value inductance is set by controlling an insertion amount of a conductor into a coil, wherein the target value inductance increases the conductor regardless of the current value inductance. A variable reactor control device characterized in that the target value inductance is set by moving in one of a direction and a decreasing direction.