JP2555142B2 - Electric control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an electric control device in which the arrangement position of an arithmetic unit is improved.

[Conventional technology]

As shown in FIGS. 3 and 4, the conventional supervisory control device is
An electric device 2 such as a transformer is arranged in a case 1 of a distribution box. A door 3 is attached to one end of the case 1. Door 3
Is provided in the opening 4, and the control case 5 made of an iron plate is opened from the opening 4.
And the iron plate case 5 is supported by the door 3. Door 3
Further, a voltage / current conversion unit 6 is attached. A control unit 7 and a mother board 8 are arranged in a control case made of an iron plate. The control unit 7 includes a calculation unit 9A, an input / output unit 9B, a power supply unit, and the like. The calculation unit 9A, the input / output unit 9B, and the like are provided on a plurality of control boards 9. A plurality of control boards 9 are arranged from the front side to the back side, that is, the width direction, and the terminal portion provided at the rear end of each control board is a connector 10.
Attached to and detached from A. The connector 10A is provided on the mother board 8. The mother substrate 8 is supported on the back surface of the iron plate control case 5. The mother board 8, the voltage / current unit 6, and the connection terminals 11 of the electric device 2 are connected to each other by a control line 12. A device of this type is disclosed in Japanese Patent Laid-Open No. 58-
No. 186309 can be cited.

In this configuration, the control unit 7 controls the operation / stop of the electric device 2 and the operation according to the load condition. The electric device 2 generates heat and magnetic flux during operation. The generated heat can be taken as a countermeasure by making a hole in the control case of the iron plate and ventilating it. However, if the magnetic flux penetrates through the hole, the following problems occur.

[Problems to be solved by the invention]

That is, the control board 9 in which the magnetic flux Φ particularly has the calculation unit 9A
Then, an induced voltage is generated. It has been found that the induced voltage causes the current flowing through the arithmetic unit to fluctuate, and becomes 1 when the control signal is 0, or vice versa, so that the arithmetic unit 9A malfunctions.

On the other hand, when the information cannot be stored in one control board 9, another control board 9 is provided separately and a part of the information is provided as a circuit, so that the width dimension of each control board 9 increases and eventually However, the width of the control case 5 made of an iron plate becomes large, and the case 1 cannot be increased in size.

An object of the present invention is to prevent a malfunction of a calculation unit,
It is to provide a downsized electric control device.

[Means for solving problems]

In the electric control device of the present invention, only the arithmetic unit is arranged outside the case.

[Operation] Then, the magnetic flux from the electric device is blocked by the case, and the magnetic flux can be prevented from being transmitted to the arithmetic unit.
It is possible to prevent malfunction of the arithmetic unit.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

The control case 5 made of a plastic member is supported by the door 3 and forms a slit hole 5B. A plurality of control boards 9 inserted in the first control case 21 are arranged in the case. The control board 9 has, for example, an input / output control board 9B and a power supply control board 9C. By mounting the insertion connector 22A on the input / output control plates 9B adjacent to each other and the receiving connector 22B that receives the insertion connector 22A on the adjacent control board 9D, the respective control boards are electrically connected. ing. The depth dimension of the control board 9D is formed longer than the other control boards 9B and 9C. A terminal block 23A is attached to the rear of the control board 9, and external terminals 23B are provided on the terminal block 23A. The external terminal 22 connects the control line. An insertion connector 23C is attached to the front surface of the control board 9. The insertion connector 23C is inserted into a receiving connector (not shown) of the mother board 8. The receiving connector is inserted through the opening 24A formed in the door 3 and attached to the mother board 8 arranged outside the front surface of the door. The mother substrate 8 is surrounded by a transparent protective case 25 supported by the door 3. The protective case 25 has a protrusion 25A, an opening 25B, and four holes 25C formed therein. Mother board 8
Is supported by the protrusion 25A. The above-mentioned receiving connector is provided on one surface of the mother board 8 and a plurality of arithmetic units 9A is provided on the other surface.
And the connector 26 are attached respectively. Arithmetic unit 9A
Is a circuit (not shown) formed on the mother board 8 and a connector
It is electrically connected to the circuit of each control board 9B to 9D via 23C. The connector 25 inserted through the opening 25B is the display board 2
It is in contact with the electrical contact surface of 7. The pin 27A of the display board 27 is inserted into the hole 25C to support the display board 27 in the protective case 25.

The keyboard 27B of the display board 27 is displayed on the display unit 27C.
For example, by pressing 1, 2, 3, voltage V, voltage A on the keyboard 27B, the measured voltage V, current A, etc. are displayed on the display unit 27C. If one display plate 27 is provided for a plurality of monitoring plates, the display plate 27 can be removed and attached to any actually measured monitoring plate so as to be detachable.

In this embodiment, the arithmetic unit 9A and the mother board 8 are the door 3
It is arranged so as to project to the outside of. As a result, the magnetic flux Φ generated in the electric device is shielded by the door 3, the magnetic flux Φ passes through the calculation unit 9A, the rate of the induced voltage is reduced, the fluctuation of the current flowing through the calculation unit 9A is small, and malfunction is prevented. I was able to do it.

Further, in this embodiment, by disposing the calculation unit 9A so as to project outside the door, the heat generated from the electric device can be shut off to some extent by the door 3, so that the temperature rise of the calculation unit 9A is suppressed and the calculation unit 9A is suppressed. The malfunction of can be prevented. In this regard,
Since the cooling hole 30 and the slit hole 5B are provided in the protective case 25 and the control case 5 so that the air flows in the arrow direction X, the heat generated by the arithmetic unit 9A and the control board 9 can be further reduced. .

Further, in this embodiment, when the insertion connector 23C is inserted into the receiving connector (not shown) provided on the rear side of the mother board 8, the control boards 9B to 9D are arranged as shown in FIG. Therefore, for example, when the control board 9D slightly exceeds the capacity of the control board 9B, it is not necessary to separately add one control board as in the conventional case, and the control board 9D having a size exceeding the capacity can be provided. Since it can be used, the case can be miniaturized without increasing the width dimension of the case 5. In this case, the depth dimension of the control board 9D is longer than that of the other control boards 9B, but since the depth dimension has the accommodation space as shown in FIG. 3, the case is not enlarged and the problem does not occur.

On the other hand, since the display unit 27 can be detachably mounted in the hole 25C, the following effects are produced. If the display unit 27 is attached to one of the multiple monitoring panels arranged in a row, this display unit can be removed and easily attached to another monitoring panel, so at least one display unit 27 is required. It is profitable and economical.

Although the monitoring control device has been described in the above embodiment,
It can also be used for other electric control devices, for example, a transformer, a switchboard, a substation control device such as a switchboard, or an electric control device. Further, the calculation unit may be arranged only on the outside of the case where the electric device is arranged.

〔The invention's effect〕

As described above, according to the supervisory control device of the present invention, it is possible to prevent malfunction of the arithmetic unit.

[Brief description of drawings]

1 is a side sectional view of a supervisory control apparatus according to an embodiment of the present invention, FIG. 2 is a partial perspective view of FIG. 1, FIG. 3 is a side sectional view of a conventional supervisory control apparatus, and FIG. FIG. 3 is a side sectional view of a main part of FIG. 3. 3 ... Door, 5 ... Control case, 8 ... Mother board, 9 ...
… Control board, 9A… Calculator, 23C… Connector.

Claims (8)

(57) [Claims] 1. An apparatus for arranging an electric device in a case and controlling the electric device by a control unit having a calculation unit, wherein an opening and a control unit are provided in a part of the case, and the control unit is inside and outside the case. 2. An electric control device comprising: a control board and an arithmetic unit arranged in the above section; and a mother board arranged between the control board and the arithmetic section to connect the two through an opening. 2. A plurality of connectors are provided on one side of the mother board, a plurality of control boards are attached and detached through the respective connectors and openings, and the other side of the mother board and an arithmetic unit arranged outside the case are electrically connected. The electric control device according to claim 1, wherein the electric control device is electrically connected. 3. The electric control device according to claim 1, wherein a mother board is arranged outside or inside the case. 4. A connector according to claim 1, wherein the plurality of adjacent control boards are connected to each other by a connector.
The electric control device according to the paragraph. 5. The electric control device according to claim 1, wherein at least one of the plurality of control boards arranged inside the case has a depth dimension longer than other control boards. 6. The electric control apparatus according to claim 1, wherein the control section in which the arithmetic section is arranged outside the case is used in a substation control apparatus. 7. An arithmetic unit arranged outside the case is covered with a protective case, and the protective case is provided with a detachable display unit for displaying a state of an electric device. The electric control device described. 8. A control board arranged inside and outside the case, a control case covering the arithmetic unit, and a part of the protective case are provided with a plurality of cooling holes for passing cooling air. An electric control device according to claim 1.