JPH09213533A - Stationary induction electromagnetic equipment - Google Patents

Abstract

(57) Abstract: The present invention relates to a static induction electromagnetic device of a power device. (EN) A static induction electromagnetic device intended to efficiently take out heat generated by the static induction electromagnetic device to the outside at low cost and to realize a small size, light weight, and low cost. A stationary induction electromagnetic device of the present invention includes a stationary induction electromagnetic device body 6, insulating oil 7, a heat collecting plate 3, and a heat collecting plate 3 inside a case.
A heat pipe cooling mechanism having a heat pipe 1, a radiation fin 2, and a cooling fan 4 is arranged, and the cooling fan 4 is arranged at a position where both the radiation fin 2 and the stationary induction electromagnetic equipment case 5 can be cooled. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static induction electromagnetic device which is electrically insulated by a fluid such as an oil-filled transformer and a gas-insulated transformer, and collects heat loss generated from a winding of the electromagnetic device by a heat pipe cooling mechanism. Thus, the present invention relates to a static induction electromagnetic device that efficiently discharges to the outside and cools.

[0002]

2. Description of the Related Art Conventional static induction electromagnetic equipment such as oil-filled transformers and oil-filled reactors with small capacity have small absolute values of total load loss, and the average temperature of the winding of the electromagnetic equipment and the temperature of insulating oil are Although it is not necessary to take special consideration to keep it within the specified range, it is necessary to increase the surface area for heat dissipation as the total loss increases as the capacity increases, as can be expressed by equation (1). Becomes

[0003]

[Equation 1]

However, θ is a temperature rise value at equilibrium k is a heat dissipation coefficient w is a total loss s is a specific means for increasing a heat dissipation area and a surface area, and a rib or a heat dissipation panel is provided on an outer wall of a case of an electromagnetic device. The temperature rise was kept within the specified range.

An example of a transformer, which is a typical example of conventional static induction electromagnetic equipment, is shown in FIGS.

That is, 60 is a transformer body, 90 is a rib provided to increase the surface area, 50 is a transformer case, 10 is a lid, and 70 is insulating oil.

The size of the rib 90 (height * length)
Is designed to satisfy the above equation (1). Therefore, when the capacity exceeds a certain level, the outer shape of the rib 90 becomes large. In the conventional cooling of the transformer, the heat generated in the winding is transferred to the upper part by the insulating oil, and is transferred from the upper part to the side part to be cooled by the wall surface of the case or the wall surface of the rib 90, and the transformer case 50 is cooled. It moves to the lower part and is heated again by the winding to rise. That is, conventional transformer cooling is performed by natural convection of insulating oil. Further, the surface area is a heat dissipation law as expressed by the above mathematical expression (1). In addition,
The same can be said for reactors as well as transformers.

Next, a heat pipe is arranged between the windings of the transformer to radiate heat generated in the windings to the outside (Japanese Utility Model Publication No. 62-42513 and Japanese Utility Model Publication No. 63-14410), A transformer provided with a guide plate for oil convection inside the case (Japanese Utility Model Laid-Open No. 55-96626) and the like have been proposed, but there is a problem regarding the effectiveness in consideration of the economical efficiency when applying it. The current situation is that it has not been put to practical use.

[0009]

As described above, in the conventional electromagnetic device, heat generated in the main body is released to the outside by natural convection of insulating oil or gas and radiation from the surface area of the case or convection of surface air. A heat radiation area for cooling the entire load loss corresponding to the capacity of the electromagnetic device is required, resulting in a large installation area and a high case manufacturing cost. In addition, the cost of the conventional heat pipe cooling mechanism increases and the original cooling effect cannot be obtained.

It is an object of the present invention to efficiently take out the heat generated by a static induction electromagnetic device to the outside at low cost and realize a small size, light weight and low cost of a static induction electromagnetic device such as a transformer or a reactor. Is.

[0011]

In order to achieve the above object, the first means of the present invention is to provide a stationary induction electromagnetic device body and insulating oil inside a case, a heat collecting plate, a heat pipe, a radiation fin, and a cooling. A cooling unit including a fan is arranged, and the cooling fan is arranged at a position where both the heat radiation fins and the case can be cooled by the wind of the cooling fan.

In order to achieve the above-mentioned object, the second means of the present invention is to provide a plurality of cooling fans, namely a cooling fan for mainly cooling the radiation fins and a cooling fan for mainly cooling the stationary induction electromagnetic equipment case. It has a fan.

In order to achieve the above-mentioned object, the third means of the present invention cools both the radiation fin and the case by at least one cooling fan, and when the load factor exceeds the specified value, another At least one fan cools the heat radiation fin or the case, or both the heat radiation fin and the case.

In order to achieve the above-mentioned object, the fourth means of the present invention provides a duct between the cooling fan and the case and the radiation fin, and adjusts the cooling air for cooling the case and the radiation fin by the duct. It was done like this.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The first means of the present invention is to generate a cooling wind by operating a cooling fan arranged at a position capable of cooling both a heat radiation fin and a stationary induction electromagnetic equipment case, and this cooling is performed. The wind hits the radiating fins and the transformer case, and can cool both the radiating fins and the transformer case.

According to the second means of the present invention, the cooling fan that mainly cools the radiation fins operates to generate cooling air, which cools the radiation fins, and the stationary induction electromagnetic equipment case is mainly used. By operating the cooling fan for cooling, the cooling air is generated, and the cooling air cools the stationary induction electromagnetic device case, so that both the radiation fin and the transformer case can be cooled.

In the third means of the present invention, at least one cooling fan operates to generate cooling air, and this cooling air cools both the radiation fin and the stationary induction electromagnetic equipment case, and the load factor is regulated. If the value is exceeded, then at least one other
By operating the individual fans, the heat dissipating fins or the stationary induction electromagnetic device case can be further cooled, which can improve the cooling capacity.

In the fourth means of the present invention, the cooling fan operates to generate cooling air, which is divided into cooling air for cooling the radiation fins by the duct and cooling air for cooling the stationary induction electromagnetic equipment case. Therefore, cooling can be performed efficiently.

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG.

In FIG. 1, 1 is a heat pipe, 2 is a radiation fin, 3 is a heat collecting plate, 4 is a cooling fan, 5 is a transformer case, 6 is a transformer body, and 7 is insulating oil.

The heat pipe 1 is a heat conducting element,
2 is a radiation fin attached to the upper part of the heat pipe 1,
3 is a heat collecting plate attached to the lower part of the heat pipe 1, 4 is a blade whose diameter is larger than the height of the radiation fin 2, and can cool both the radiation fin 2 and the transformer case 5, and the tip of the blade. Is a cooling fan by an axial fan arranged at a position on the same line as the upper end of the radiation fin 2, 5 is a transformer case, 6 is a transformer main body housed inside the transformer case 5, and 7 is a transformer. It is the insulating oil contained in the container case 5.

The operation of the transformer configured as described above will be described. When a voltage is applied to the transformer, heat is generated in the transformer body 6 to raise the temperature, and the heat is transmitted to the insulating oil 7 to raise the temperature of the insulating oil 7. The heat of the insulating oil 7 circulates by natural convection of the insulating oil 7 and is naturally radiated from the surface of the transformer case 5, but is mainly collected by the heat collecting plate 3 and conducted to the radiating fins 2 by the heat pipe 1. The heat is dissipated by the heat dissipating fins 2. Furthermore, the radiation fins 2 and the transformer case 5 are forcibly cooled by the wind generated by the operation of the cooling fan 4 arranged at a position where both the radiation fins 2 and the transformer case 5 can be cooled, and the transformer main body 6 And the temperature rise of the insulating oil 7 is suppressed.

As described above, the diameter of the blade is 2
Larger than the height of the radiating fin 2 and transformer case 5
And the cooling fan 4 is provided at a position where the tips of the blades are on the same straight line as the upper tips of the radiation fins 2, so that the cooling air is not wasted and the radiation fins 2
Not only can it be cooled, but also the transformer case 5 can be cooled, so that it can be cooled efficiently.

(Embodiment 2) Hereinafter, Embodiment 2 of the present invention will be described with reference to FIG.

In FIG. 2, the same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. 4a and 4b are cooling fans which are axial flows. The difference from the configuration of FIG. 1 is that the cooling fan 4a is arranged at a position for mainly cooling the radiation fins 2, and the cooling fan 4b is arranged at a position for mainly cooling the transformer case 5. .

Regarding the transformer configured as described above,
The operation will be described with reference to FIG. When a voltage is applied to the transformer, heat is generated in the transformer body 6 to raise the temperature, and the heat is transmitted to the insulating oil 7 to raise the temperature of the insulating oil 7. The heat of the insulating oil 7 is circulated by natural convection of the insulating oil 7, is naturally radiated from the surface of the transformer case 5, and is also collected by the heat collecting plate 3 and the heat radiating fins 2 by the heat pipe 1.
And the heat is dissipated by the heat radiation fins 2. Further, the radiation fins 2 are forcibly cooled by the wind generated by the operation of the cooling fan 4a, and the surface of the transformer case 5 is forcibly cooled by the wind generated by the operation of the cooling fan 4b. The temperature rise of the insulating oil 7 is suppressed.

As described above, the cooling fan 4a is arranged at a position for mainly cooling the radiation fins 2, and the cooling fan 4b is provided.
The heat dissipating fins 2 and the transformer case 5 can be efficiently cooled individually by arranging the transformer case 5 at a position where the transformer case 5 is mainly cooled, so that the transformer case 5 can also be efficiently cooled.

(Embodiment 3) Hereinafter, an embodiment of the present invention will be described with reference to FIG.

In FIG. 3, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. 4c,
Reference numerals 4d and 4e are cooling fans composed of axial fans. The difference from the configuration of FIG. 1 is that cooling fans 4c, 4d, and 4e, which have different operating conditions and are operated separately, are provided.

Regarding the transformer configured as described above,
The operation will be described. When a voltage is applied to the transformer, heat is generated in the transformer body 6 to raise the temperature, and the heat is transmitted to the insulating oil 7 to raise the temperature of the insulating oil 7. The heat of the insulating oil 7 is circulated by natural convection of the insulating oil 7, is naturally radiated from the surface of the transformer case 5, is also collected by the heat collecting plate 3 and is conducted to the radiating fins 2 by the heat pipe 1, and is radiating fins. Heat is dissipated at 2. Furthermore, the surfaces of the radiation fins 2 and the transformer case 5 are forcibly cooled by the wind generated by the operation of the cooling fan 4c arranged at a position where both the radiation fins 2 and the transformer case 5 can be cooled.
When the load factor exceeds the specified value, the cooling fan 4d or 4e operates independently, or the wind generated by the cooling fans 4d and 4e operating simultaneously cools the surfaces of the radiation fin 2 and the transformer case 5 by force. As a result, the temperature rise of the transformer body 6 and the insulating oil 7 is suppressed.

As described above, the plurality of cooling fans 4c, 4
d, 4e are provided, and cooling fans 4c, 4e are provided depending on the load factor.
By controlling the rotation of d and 4e, the transformer can be cooled efficiently, and the cooling fans 4c, 4d and 4e can also be used efficiently.

(Fourth Embodiment) The fourth embodiment of the present invention will be described below with reference to FIG.

In FIG. 4, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 8 is an air volume adjusting duct. The difference from the configuration of FIG. 1 is that an air flow rate adjusting duct 8 is provided between the cooling fan 4 which is an axial fan, the radiation fin 2 and the transformer case 5.

The operation of the transformer configured as described above will be described. When a voltage is applied to the transformer, heat is generated in the transformer body 6 to raise the temperature, and the heat is transmitted to the insulating oil 7 to raise the temperature of the insulating oil 7. The heat of the insulating oil 7 is circulated by natural convection of the insulating oil 7, is naturally radiated from the surface of the transformer case 5, is also collected by the heat collecting plate 3 and is conducted to the radiating fins 2 by the heat pipe 1, and is radiating fins. Heat is naturally dissipated at 2. Further, the wind generated by the operation of the cooling fan 4 arranged at a position where both the heat radiation fin 2 and the transformer case 5 can be cooled cools the heat radiation fin 2 by the air volume adjusting duct 8 and the transformer case. The heat is dissipated into the air for cooling 5, and the surfaces of the radiating fins 2 and the transformer case 5 are forcibly cooled by this air, and the temperature rise of the transformer main body 6 and the insulating oil 7 is suppressed.

As described above, by providing the air volume adjusting duct 8 between the heat dissipating fins 2 and the transformer case 5 and the cooling fan 4, the air volume generated by the operation of the cooling fan 4 is the air volume adjusting duct. The optimum wind hits the heat radiation fins 2 and the transformer case 5 and can be efficiently cooled.

Needless to say, in Embodiments 1 to 4, the heat radiation amount is greater when the heat radiation ribs or heat radiation plates are provided on the surface of the transformer case 5. There are two types of heat radiating ribs or heat radiating plates, one with oil and one with adhesive.

Although the cooling fan 4 is an axial flow fan in the first to fourth embodiments, the cooling fan 4 may be a cross flow fan (cross flow fan), a centrifugal blower or a vortex flow blower. The features of each cooling fan are that the axial fan has a large air volume, the centrifugal blower has a high static pressure, the cross-flow fan has a uniform wind speed distribution, and the swirl blower has a high static pressure. The material of the blades of the cooling fan 4 may be metal instead of resin.

Although the cooling fan 4 is arranged in the vicinity of the transformer case 5 in the first to fourth embodiments, even if the cooling fan 4 is arranged at a long distance, a duct is used to dissipate the heat radiation fins 2.
It goes without saying that the same effect can be obtained if the required amount of air is obtained by inducing the wind in the transformer case 5.

Although the oil-filled transformer has been described in the present embodiment, it goes without saying that the same effect can be obtained by other electrostatic induction electromagnetic equipment with the same configuration.

[0040]

As described above, the present invention reduces the waste of cooling air and cools only the radiation fins by providing the cooling fan at a position where both the radiation fins and the stationary induction electromagnetic equipment case can be cooled. Instead, the stationary induction electromagnetic equipment case can also be cooled, so that it can be cooled efficiently.

Further, by disposing the cooling fan at the position for mainly cooling the radiation fin and the other cooling fan at the position for primarily cooling the stationary induction electromagnetic equipment case, the radiation fin and the stationary Since the induction electromagnetic device case can be efficiently cooled individually, it can be efficiently cooled as a stationary induction electromagnetic device.

Further, by disposing a plurality of cooling fans and controlling the rotation of the cooling fans according to the load factor, the stationary induction electromagnetic equipment can be efficiently cooled, and the cooling fans can also be used efficiently.

Further, by providing an air volume adjusting duct between the cooling fan and the radiation fins and the stationary induction electromagnetic equipment case, the air generated by the operation of the cooling fan is separated by the air volume adjusting duct, which is optimal. The wind hits the heat radiation fins and the stationary induction electromagnetic device, and can be efficiently cooled. As described above, the static induction electromagnetic device of the present invention has excellent effects.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of a stationary induction electromagnetic device showing a first embodiment of the present invention.

FIG. 2 is a schematic side sectional view of a stationary induction electromagnetic device showing a second embodiment of the present invention.

FIG. 3 is a schematic front view of a stationary induction electromagnetic device showing a third embodiment of the present invention.

FIG. 4 is a schematic side sectional view of a static induction electromagnetic device showing a fourth embodiment of the present invention.

FIG. 5 is a partially cutaway view of a conventional transformer.

FIG. 6 is a schematic top sectional view of a conventional transformer.

[Explanation of symbols]

 1 Heat Pipe 2 Heat Dissipation Fins 3 Heat Collection Plate 4 Cooling Fan 4a Cooling Fan 4b Cooling Fan 4c Cooling Fan 4d Cooling Fan 4e Cooling Fan 5 Transformer Case (Case) 6 Transformer Body (Stationary Induction Electromagnetic Equipment Body) 7 Insulating Oil 8 Air flow adjustment duct

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Murata 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A stationary induction electromagnetic device body inside a case,
Static induction in which a heat pipe cooling mechanism having an insulating oil, a heat collecting plate, a heat pipe, a radiation fin, and a cooling fan is arranged, and the cooling fan is arranged at a position where both the radiation fin and the case can be cooled. Electromagnetic equipment. 2. The cooling fan has a blade diameter larger than the height of the heat radiation fins, and the cooling fan is arranged such that the tip ends of the cooling fan blades are on the same line as the upper tip portions of the heat radiation fins. The static induction electromagnetic device described. 3. A stationary induction electromagnetic device body inside the case,
A heat pipe cooling mechanism having an insulating oil, a heat collecting plate, a heat pipe, a radiation fin, and a cooling fan is provided, and the cooling fan that mainly cools the radiation fin and the stationary induction electromagnetic device case are mainly cooled. Static induction electromagnetic equipment equipped with a cooling fan and a plurality of cooling fans. 4. A main body of the static induction electromagnetic device inside the case,
A heat pipe cooling mechanism having insulating oil, a heat collecting plate, a heat pipe, a radiation fin, and a plurality of cooling fans is provided, and both the radiation fin and the case are cooled by at least one cooling fan, and a load factor A static induction electromagnetic device comprising at least one fan for cooling the cooling fin or the case, and both the heat radiation fin and the case when the temperature exceeds a specified value. 5. A stationary induction electromagnetic device body inside the case,
A heat pipe cooling mechanism having an insulating oil, a heat collecting plate, a heat pipe, a radiation fin, and a cooling fan is arranged, and an air volume adjusting duct is provided between the cooling fan and the case.
A static induction electromagnetic device that adjusts the cooling air that cools the case and the radiation fins by the air volume adjusting duct.