JP2935409B2 - Current detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current detector used for a control circuit such as an inverter circuit and an uninterruptible power supply.

[0002]

2. Description of the Related Art Conventionally, this type of current detector has been disclosed in FIG.
As shown in (1), only a coil unit 1 through which a current to be detected flows and a Hall element 2 for detecting a magnetic flux generated by the coil current are provided, and a detection circuit 4 is mounted on a control circuit board 5 of the apparatus. This is a method for reducing the man-hour for assembling the current detector and for reducing the total cost of the control circuit board 5.

In this case, the Hall element 2 is mounted on a dedicated substrate 3 as shown in FIG. 5 , and the substrate 3 is provided with a magnetic material 6 (an E core 6a with a gap and an I (Combination of the cores 6b).

[0004]

However, the external mounting of the detection circuit 4 simplifies the operation of assembling the substrate 3, but the current detector holds the substrate 3 as shown in FIG. -Since the fixing cover C is required, the mechanism becomes complicated mechanically, and the cost is rather increased.

Therefore, as shown in FIGS. 6 and 7 , the Hall element 2 is directly attached to the control circuit board 5 together with the detection circuit 4 so that the element section enters the gap between the magnetic members 6 of the coil section 1. 1 may be mounted on the control circuit board 5. According to this method, the cover C is not required, and the mechanism of the coil unit 1 is simplified. However, it is difficult to position the element unit and the detection operation becomes unstable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a current detector which solves the above-mentioned drawbacks, simplifies the structure, and enables cost reduction.

[0007]

That is, in the present invention, a Hall element (2) is arranged near a coil section (1) constructed by incorporating a magnetic body (6), and a coil of the coil section (1) is provided. A current detector configured to detect a magnetic flux generated by a current by the Hall element (2) and to detect a current flow through a detection circuit (4) based on the detection output; while mounted on the control circuit board (5) with the mounted substrate 2) (3) a detection circuit (4), said substrate (3) can be arranged the coil unit (1) on the substrate (3) Hall element (2) is configured and mounted on the control circuit board (5) so as to sense the magnetic flux, further
And a rectangular hole for fixing an element portion at a predetermined position of the substrate (3).
(3a) and a substrate fixing part on the lower end of the substrate (3).
A foot (3b) is provided, and the Hall element is provided in the square hole (3a).
(2) is fitted and fixed, and the board fixing foot (3b)
Is provided in the board fixing hole (5b) provided in the control circuit board (5).
)) To fix the substrate (3).
The lead pin (2a) of the Hall element (2) is moved to the control circuit.
The board (3) is soldered to the circuit board (5),
It is mounted on the control circuit board (5) .

[0008]

[0009]

[0010]

With the above configuration, the current detector is assembled by soldering a board on which a Hall element is mounted together with a detection circuit to a control circuit board, and then mounting a coil portion.

Since the board on which the Hall element is mounted is fixed to the control circuit board, a mechanism for holding and fixing the Hall element becomes unnecessary. In addition, when the Hall element is mounted on a dedicated substrate, it becomes easy to always arrange the Hall element at an appropriate position where magnetic flux can be detected, and the current detection operation is stabilized.

[0012]

1 and 2 show an embodiment of a current detector according to the present invention. FIG. 1 is an external structural view showing a mounting mode of the current detector, and FIG. 2 is an exploded view of the current detector. FIG.

As shown in the figure, a bobbin 7 is provided with a conductor winding 8 formed by winding a conductor through which a current to be detected flows, and a winding outer peripheral tape 9 is wound so as to cover the outer periphery thereof. The bobbin 7 incorporates a magnetic body 6 as a gap-equipped E-core 6a and I-core 6b to form the coil section 1 of the current detector. A winding lead 10 is drawn from the coil section 1 as a terminal for supplying a current to be detected. Reference numeral 3 denotes a dedicated board on which the Hall element 2 is mounted, which is mounted on a control circuit board 5 together with a detection circuit 4 for receiving a magnetic flux detected by the Hall element 2 as a voltage.

The bobbin 7 of the coil section 1 has a structure in which the element section of the Hall element 2 can be arranged in the gap between the combined magnetic bodies 6a and 6b. This is to improve the sticking.

[0015]

[0016]

[0017]That is,As a method using the substrate 3,FIG.
As shown in (a) and (b), the hoe with lead pin 2a
Uses element 2didIf,Device part fixed on top of substrate 3
Square holes 3a, and board fixing feet 3b at the bottom.
The Hall element 2 is fitted and fixed in the square hole 3a, and the lead pin
After bending the board 2a, the board fixing foot 3b is connected to the control circuit board.
The board 3 is fixed by fitting it into a board fixing hole 5b provided in the board 5.
And then fold it (it may be fixed with adhesive after fitting)
Connect bent lead pin 2a to lead pin solder pad 5a
Soldering structureCan be. This way
Ba, EThe position of the rule element 2 can be set accurately,As a detector
Operation is not only stable,Easy to assemble and value
It will be cheaper.

[0018] In this case, the bobbin 7 of the coil unit 1 has a structure capable of arranging the Hall element board 3, after mounting the substrate 3, insert the board guide 11 of the coil portion 1 on the substrate 3, the winding drawer 10 Is soldered to the control circuit board 5, whereby the Hall element 2 on the board 3 is arranged at an appropriate position where the magnetic flux can be detected, and the current detector is assembled.

[0019]

As described above, according to the present invention, the board on which the Hall element is mounted is soldered together with the detection circuit to the control circuit board on which the current detector is mounted, and then the coil is mounted and assembled. This eliminates the need for a cover for holding and fixing the Hall element mounting board as in the related art, and can reduce the number of components. Therefore, it is possible to reduce the size and cost of the device. Moreover, the operation of the current detector is stable because the Hall element can always be stably arranged at a fixed position.

[Brief description of the drawings]

FIG. 1 is an external structural view showing a mounting mode of a current detector according to the present invention.

FIG. 2 is an exploded view showing the structure of the current detector, and is a rear view of FIG.

FIG. 3 shows the mounting of the Hall element mounting board according to the present invention .
FIG.

FIG. 4 is a diagram showing a mounting state of a conventional current detector.

FIG. 5 is an exploded view showing the structure of the current detector.

FIG. 6 is an external view showing a mounting mode of a current detector different from that of FIG . 4;
FIG.

FIG. 7 is an exploded view showing the structure of the current detector.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masami Miyamoto 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd. (72) Inventor Akihiro Sudo 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd. (56) References JP-A-63-12970 (JP, A) JP-A 64-15970 (JP, U) JP-A-4-81070 (JP, U) (58) Investigation Field (Int.Cl. ⁶ , DB name) G01R 15/20 G01R 33/06-33/09

Claims (1)

(57) [Claims] A Hall element (2) is arranged near a coil section (1) formed by incorporating a magnetic body (6), and a magnetic flux generated by a coil current of the coil section (1) is transmitted to the Hall element (2). 2) a current detector for detecting a current flow via a detection circuit (4) based on the detection output, wherein the substrate (3) on which the Hall element (2) is mounted is A Hall element (2) on the substrate (3) detects the magnetic flux while mounting the coil part (1) on which the substrate (3) can be arranged together with the detection circuit (4) on a control circuit substrate (5). Ri formed and mounted on the control circuit board (5) so as to obtain, further, before
A square hole (3a) for fixing an element portion is provided at a predetermined position on the substrate (3).
And a board fixing foot (3b) at the lower end of the board (3).
), And the Hall element (2) is provided in the square hole (3a).
And fix the board fixing foot (3b)
Fits in board fixing hole (5b) provided in control circuit board (5)
And fix the substrate (3)
The lead pin (2a) of the element (2) is connected to the control circuit board.
(5) soldering the substrate (3) to the control circuit
A current detector mounted on the substrate (5) .