JP3243670B2 - Manufacturing method of current sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a current sensor in which a wire to be detected as a primary conductor is wound around a secondary annular core for detecting a current of a current sensor .

[0002]

2. Description of the Related Art Conventionally, in a current transformer type current sensor for detecting a current flowing through a detection target wire as a primary conductor through an annular detection core around which a detection coil is wound, The detection sensitivity of the current is increased by wrapping the detection line several times around the detection core portion. However, the detection line is manually wound around the detection core portion.

Conventionally, as shown in FIG. 6, when a conductor is wound in a toroidal shape around a cylindrical core 14 of a motor,
A flyer 15 that can be divided into two is attached to the core 14 in a chain shape, the tip of a conducting wire 16 is attached to the flyer 15, and the core 14 is turned in the direction indicated by the arrow A in the figure,
The flyer 15 is rotated by a special winding machine (not shown) using a motor using the flyer 15 as a drive source, as shown by an arrow B in the figure, and the conductor 16 is automatically wound around the core 14. I'm going to go.

[0004]

The problem to be solved is that if the wire to be detected is manually wound around the detection core portion of the current sensor, the work becomes complicated.

[0005] Further, using a winding machine with a flyer,
If the wire to be detected is automatically wound around the detection core of the current sensor, a flyer must be attached to the detection core prior to the winding, and the flyer must be removed from the detection core after the winding. The work of attaching and detaching the flyer is complicated. In addition, a device for rotating the flyer while relatively moving the flyer and the detection core is complicated.

[0006]

A current sensor according to the present invention.
In the method of manufacturing , the detection core portion of the current sensor,
Attach a jig for winding such as a flyer in advance,
To easily wind the wire to be detected around the detection core of the current sensor without having to remove it afterwards, attach a helical spring to the detection core of the current sensor.
Winding process and the end of the wound vine spring
Attach the wire to be detected to the end,
Remove the helical spring from the detection core of the current sensor.
As a result, the detected wire is connected to the detection core of the current sensor.
And a winding step .

[0007] The present invention also provides a helical spring with a helical spring.
Attached to the rotating shaft of the motor so that it can rotate around the axis
And rotating the helical spring by a motor
To wrap it around the detection core of the current sensor
At the tip of the wound vine spring.
Attach the wire and connect the helical spring to the current sensor.
By removing the wire from the detection core,
Winding around the detection core portion of the flow sensor.
I have to.

[0008] Further, the present invention provides a method for controlling the rotation of a motor.
Winding the helical spring around the detection core of the current sensor
And take the wire to be detected on the wound helical spring.
Attaching and detecting the helical spring by reverse rotation of the motor.
At the same time as removing from the output core part,
A step of winding around the part.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a current sensor according to the present invention is shown in FIG.
3 is performed as shown in FIG.

First, as shown in FIG. 1, a helical spring 1 is mounted on a rotating shaft of a motor 2 via a wheel 3 so that the helical spring 1 can be rotated about its axis OO. And the helical spring 1 is rotated by the rotation of the motor 2.
Is wound around the detection core 5 of the current sensor 4.

Next, as shown in FIG.
The motor 2 is stopped in a state where the tip of the coil spring 1 expands and contracts and the coil 2 is sufficiently wound around the detection core 5, and in this state, the reel ( (Not shown) is connected to one end of the wire 8 to be detected.

Then, as shown in FIG. 3, while the motor 2 is rotated in the reverse direction to wind the helical spring 1 from the detection core 5, the wire 8 to be detected is wound around the detection core 5.

When the helical spring 1 is wound from the detection core 5, the motor 2 is stopped, and the wire 8 to be detected is removed from the helical spring 1.

An encoder 9 for detecting the number of revolutions of the motor 2 is attached to the motor 2. While the encoder 9 detects the number of revolutions of the motor 2, the controller (not shown) controls the forward and reverse rotation of the motor. Is performed.

When a single copper wire used for a winding for a rotating electric machine or a winding for a transformer is used as the detected wire 8, there is no problem if the wire is relatively thin, but the current capacity becomes large. When the wire becomes thicker, the bending rigidity increases, and it becomes difficult to wind the wire around the detection core 5 of the current sensor 4. In this case, a relatively flexible stranded wire is used. The winding property is improved.

As described above, according to the present invention, the detected line 8
The motor 2 can be mounted without any work such as attaching the jig for winding to the detection core 5 in advance and removing the jig from the detection core 5 afterwards.
By simply rotating the helical spring 1 in the forward and reverse directions by the drive, the wire to be detected can be easily wound around the detection core portion of the current sensor.

Further, according to the present invention, there is no need for any relative moving means between the helical spring 1 as a jig for winding and the current sensor 4.
Is simply rotated by the motor 2 at a fixed position, so that the detection core 5 of the current sensor 4
The detected wire 8 can be reliably wound around the portion several times.

FIGS. 4 and 5 show a reference example . In this case, a bobbin 11 made of a synthetic resin which can be divided into two vertically.
Is attached to the detection core 5 of the current sensor 4, the detected wire 8 is passed through a hole 12 provided in one flange of the bobbin 11, and the other is attached to the output shaft of the motor 2. The detected wire 8 is wound around the bobbin 11 by rotating the bobbin 11 by abutting the applied rubber roller 13.

In this case, the bobbin 11 is used in a state where it is mounted on the current sensor 4 without being removed.

According to this method, the detected wire 8 can be easily wound around the detection core 5 of the current sensor 4 by a simple means. In that case, especially bobbin 1
Since 1 is used, a large number of fine wires can be wound as the detected wire 8, which is effective when it is desired to increase the detection accuracy of the current sensor 4 with a small current.

[0021]

As described above, in the method of manufacturing the current sensor according to the present invention , the helical spring is connected to the detection core portion of the current sensor.
And the winding of the wound vine spring
The process of attaching the wire to be detected to the tip and the winding
Remove the helical spring from the detection core of the current sensor.
By doing so, the detected wire is connected to the detection core of the current sensor.
The current detection sensor core is detected without the need to attach a winding jig in advance or remove it afterwards. This has the advantage that the wire can be easily wound.

Further , a method of manufacturing a current sensor according to the present invention.
, Rotate the helical spring around the axis of the spring
The process of attaching to the rotating shaft of the motor so that
The current is generated by rotating the helical spring with a motor.
Wrapping around the detection core of the sensor and winding
Attach the wire to be detected to the tip of the wound helical spring.
The helical spring from the detection core of the current sensor.
By removing, the detected wire is
So it was also to take a step of wrapping the A part, things
Attach the winding jig before or remove it
Without having to remove it.
Easily wind the wire to be detected around the sensor core
It has the advantage of being able to

Further, a method of manufacturing the current sensor according to the present invention.
In the law, the rotation of the motor causes the helical spring to
Wrapping around the detection core of the sensor and winding
Attaching the wire to be detected to the helical spring
The helical spring is removed from the detection core by the reverse rotation of the motor.
At the same time, remove the detected wire around the detection core
The process for winding is performed in advance.
To attach or remove components afterwards
Detection core of the current sensor without any complicated work
The advantage is that the wire to be detected can be easily wound
Have a point.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a helical spring is wound around a detection core portion of a current sensor according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state in which a helical spring is wound around a detection core portion of a current sensor.

FIG. 3 is a diagram illustrating a state where a wire to be detected is wound around a detection core portion of a current sensor by winding of a helical spring;

FIG. 4 is a diagram showing a state in which a bobbin is attached to a detection core portion of a current sensor as a reference example .

FIG. 5 is a diagram showing a state in which a detection target line is wound around a bobbin.

FIG. 6 is a view showing a conventional method of winding a conductive wire around a cylindrical core.

[Explanation of symbols]

 1 helical spring 2 motor 4 current sensor 5 detection core 8 detected wire 9 encoder

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01R 15/00-15/26 H01F 5/00-5/02 H01F 40/00-40/14 H01F 41 / 00-41/10

Claims (3)

(57) [Claims] A helical spring is connected to a detection core portion of a current sensor.
And the winding of the wound vine spring
The process of attaching the wire to be detected to the tip and the winding
Remove the helical spring from the detection core of the current sensor.
By doing so, the detected wire is connected to the detection core of the current sensor.
Of a current sensor having a process of winding around
How . 2. The helical spring is turned around the axis of the spring.
A process of attaching the motor to the rotating shaft of the motor so that
By rotating the helical spring by a motor,
Winding around the detection core of the flow sensor and winding
Attach the wire to be detected to the tip of the attached helical spring
Process and the helical spring is the detection core part of the current sensor.
To remove the detected line from the current sensor.
And a step of winding around the core.
Manufacturing method of sa . 3. A helical spring is driven by the rotation of the motor to generate a current.
Wrapping around the detection core of the sensor and winding
Attaching the wire to be detected to the helical spring
The helical spring is removed from the detection core by the reverse rotation of the motor.
At the same time, remove the detected wire around the detection core
A method for manufacturing a current sensor .