JP2010099692A - Arc welding controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in which an air blowing rate of a cooling fan is reduced, making cooling of a DC reactor insufficient, when a dust filter is attached to the cooling fan for the purpose of preventing dust particles such as iron powder from infiltrating from the outside into an arc welding machine through the cooling fan. <P>SOLUTION: An arc welding controller includes: a DC reactor which is structured with a core, a coil wound on the periphery of the core through a spacer, a molding resin covering the periphery of the coil to form a near rectangular parallelepiped or a near cube, a starting end part and a terminating end part formed by projecting the chip end of the coil to one surface of the periphery of the molding resin, and a metallic cooling plate mounted on one face among other surfaces of the periphery; and a heat sink which is built in the housing of the arc welding machine and which is mounted with the DC reactor through the cooling plate. Heat generated in the coil is dissipated through the heat sink in the arc welding controller. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a DC reactor used in an arc welding control device.

  Conventional DC reactors used for arc welding machines cool by applying cooling air blown from a cooling fan to the outer periphery of the coil 1 forming the DC reactor in order to dissipate heat generated by power loss.

  FIG. 6 is a perspective view of a conventional DC reactor. This DC reactor is formed by a core 6 and a coil 1 wound around the core 6.

  The core 6 shown in FIG. 6 forms a core having a columnar shape by overlapping a plurality of magnetic thin plates.

  The spacer 4 fills a gap formed between the outer peripheral surface of the core 6 and the inner peripheral surface of the winding portion of the coil 1 in a state where the core is housed in the winding portion of the coil 1. To prevent it from moving unnecessarily.

  The coil 1 is wound with a predetermined insulating distance from the core 6 via the four spacers 4 shown in FIG. 6, and the coil 1 is a thick plate-shaped rectangular plate whose surface is attached by an insulating film, for example, Nomex. It is formed by bending a line in its width direction. The coil 1 is formed by winding a single flat wire, and the thickness direction of the flat wire is parallel to the magnetic path direction of the core 6.

  The mounting bracket 7 shown in FIG. 6 is fixed to both ends of the core 6 by, for example, MAG welding.

  The DC reactor shown in FIG. 6 is fixed via a mounting bracket 7 at a place where cooling air is blown from a cooling fan built in an arc welding machine (not shown). And in order to radiate the heat | fever which generate | occur | produces by the power loss of a direct current reactor, it cooled by applying cooling air to the outer peripheral part of the coil 1. FIG. (For example, Patent Document 1)

JP-A-4-330338 JP 2007-173700 A

The cooling of the DC reactor of the prior art shown in FIG. 6 is fixed to a place where cooling air is blown by a cooling fan of an arc welding machine (not shown) via a mounting bracket 7 and the surface of the coil 1 wound around the core. The temperature of the coil 1 rising by applying cooling air was suppressed. At this time, dust such as iron powder entered the arc welding machine from the outside through the cooling fan, and a dustproof filter was attached to the cooling fan in order to prevent the dust such as iron powder from entering.
However, since the air blowing amount of the cooling fan is decreased by the dustproof filter and the temperature of the coil 1 is increased, the cooling fan having a large air blowing amount is used.

  Therefore, an object of the present invention is to provide a DC reactor that can be used with a dustproof filter attached to a cooling fan.

  In order to solve the above-described problems, the present invention provides a coil that is wound around the outer periphery of a core via a spacer, and the outer periphery of the coil is covered with a mold resin to form a substantially rectangular parallelepiped or a substantially cube. A DC reactor formed by projecting a starting end and a terminal end of the coil on one surface of the part and attaching a metal cooling plate to one of the other surfaces of the outer peripheral part, and a housing of the arc welding machine. A heat sink built in the body and mounting the DC reactor via the cooling plate; and a cooling fan for blowing cooling air to the heat sink, and the heat generated by the coil is dissipated by the heat sink. This is an arc welding control device.

  The second invention is characterized in that the surface of the mold resin to which the cooling plate is attached is a bottom surface, and the cooling plate is attached to at least one of the four surfaces in contact with the bottom surface. The arc welding control device according to claim 1.

  3rd invention comprises the arc welding control apparatus of Claim 1, It is a direct-current reactor characterized by the above-mentioned.

  The direct current reactor of the present invention covers the outer periphery with a mold resin to produce a substantially rectangular parallelepiped or a substantially cubic body, and a metal cooling plate is attached to one surface of the outer periphery of the mold resin, and is built in the casing of the arc welder. Since the heat generated in the DC reactor coil is conducted to the heat sink via the mold resin and the cooling plate, the heat can be efficiently radiated from the cooling fan. The coil of the DC reactor can be cooled even if the amount of blown air is greatly reduced and the cooling air is no longer applied.

  In the second invention, the surface of the mold resin to which the cooling plate is attached is the bottom surface, and the cooling plate is attached to at least one of the four surfaces in contact with the bottom surface. Since heat can be efficiently conducted to the heat sink through the added cooling plate, the cooling effect can be further improved.

  In the third invention, the direct current reactor constituting the arc welding control device has improved impact resistance in addition to thermal conductivity because the mold resin covering the outer peripheral portion is excellent in heat resistance, leading to improvement in impact resistance of the direct current reactor. .

  In FIG. 1, the outer periphery of the coil of the DC reactor is covered with a mold resin 8, for example, a substantially rectangular parallelepiped is formed, and a metal cooling plate 9 is attached to the bottom surface of the rectangular parallelepiped shown in FIG. FIG. 2 is a perspective view when placed on a surface of a heat sink 11 provided at a predetermined position in a housing of an arc welding machine (not shown), and FIG. 2 is a cross-sectional view of a DC reactor covered with a mold resin 8. is there. 1 and 2, the same reference numerals as those of the conventional DC reactor shown in FIG. 6 have the same configuration, and thus description thereof will be omitted. Only components having different reference numerals will be described.

  A coil 1 shown in FIG. 2 is wound with a predetermined insulation distance from a core 6 through four spacers 4 by bending a bare flat plate-like rectangular wire in the width direction. The coil 1 is formed by winding a single flat wire, and the thickness direction of the flat wire is parallel to the magnetic path direction of the core 6.

  The comb 5 shown in FIG. 2 and FIG. 3 is fixed to the top and bottom of the bare wire coil 1 wound around the core 6, and the tape 1 is wound to prevent the coil 1 from being scattered, thereby maintaining the distance between the layers.

  The starting end 2 of the coil 1 shown in FIG. 2 protrudes upward from the left side of the front end of the coil 1, and the terminal end 3 of the coil 1 protrudes upward from the right side of the rear end of the coil 1 by a predetermined dimension. .

  As shown in FIG. 2, a substantially rectangular parallelepiped is formed by covering the outer periphery of the coil 1 of the DC reactor with a mold resin 8. At this time, the starting end portion 2 of the coil 1 and the terminal end portion 3 of the coil 1 protrude from the upper surface portion of the rectangular parallelepiped covered with the mold resin 8. And the metal cooling plate 9 is attached to a bottom face part.

Next, conduction of heat generated from the coil 1 of the DC reactor when the surface of the heat sink 12 shown in FIG. 1 and the cooling plate 9 of the DC reactor are bonded will be described.
This mold resin 8 is excellent in thermal conductivity and covers the coil 1 and the core 6 forming the DC reactor in a sufficiently contacted state, and the heat generated from the core 6 is passed through the mold resin 8 to the DC reactor cooling plate 9. Conduct to.

Since the cooling plate 9 of the DC reactor shown in FIG. 1 and the surface of the heat sink 12 built in the casing of the arc welder are bonded, the heat generated by the core 6 is conducted to the heat sink 12 via the cooling plate 9. The heat conducted by the heat sink 12 is efficiently radiated. Therefore, in the present invention, the temperature rise of the coil 1 of the DC reactor is suppressed even with the dustproof filter attached to the cooling fan.
In the above description, the opposite side of the surface from which the starting end portion 2 of the coil 1 and the terminal end portion 3 of the coil 1 protrude is defined as the bottom surface portion, and the cooling plate 9 is attached to this bottom surface portion. A cooling plate 9 may be attached to the surface.

  In addition, the molding resin is excellent in thermal conductivity, but it is preferable that the molding resin is also excellent in electrical insulation and impact resistance. Examples of such a mold resin include an epoxy resin, a silicon resin, and a urethane resin. Moreover, although the aluminum material is used for the material of the cooling plate 9 of a direct current reactor, you may use fine ceramics etc. of heat conductivity other than a metal.

  3, FIG. 4 and FIG. 5 are drawings of a DC reactor according to the second embodiment. In FIG. 3, components having the same reference numerals as those of the DC reactor shown in FIG. Only components having different reference numerals will be described.

As shown in FIG. 5, the outer periphery of the DC reactor coil 1 is covered with a mold resin 8 to form, for example, a substantially rectangular parallelepiped. At this time, the start end portion 2 of the coil 1 and the end portion 3 of the coil 1 are projected from the upper surface portion of the rectangular parallelepiped covered with the mold resin 8.
Then, the surface of the mold resin 8 to which the cooling plate 9 is attached is the bottom surface, and the cooling plate is attached to at least one of the four surfaces in contact with the bottom surface. In the second embodiment, as shown in FIGS. 4 and 5, the cooling plate 10 is attached to the right side surface portion in contact with the bottom surface portion, and the cooling plate 11 is attached to the left side surface portion.

Next, conduction of heat generated from the DC reactor when the surface of the heat sink 12 and the cooling plate 9 of the DC reactor shown in FIG. 5 are bonded will be described.
The coil 1 forming the DC reactor is sufficiently brought into contact with the mold resin 8, and heat generated at the bottom surface of the coil 1 shown in FIG. 4 is conducted to the cooling plate 9, and heat generated at the right side surface of the coil 1 is cooled by the cooling plate. The heat generated in the left side surface of the coil 1 is conducted to the cooling plate 11.

For example, when an aluminum material is used for the cooling plate 10 and the cooling plate 11, heat generated at the right side surface of the coil 1 is conducted to the heat sink 12 via the cooling plate 10 because the heat conductivity is higher than that of the mold resin 8. And since the heat | fever generate | occur | produced by the left side is conducted to the heat sink 12 via the cooling plate 11, suppression of the temperature rise of the coil 1 of a DC reactor is further improved.
In the above description, the heat sink 12 has a tunnel-type shape including an outer peripheral portion for forming a hollow portion through which air is circulated, cooling air is blown from the cooling fan to the hollow portion, and a cooling plate is formed on the outer peripheral portion to form the hollow portion. A DC reactor having 9 may be mounted.

It is a perspective view when the direct-current reactor of Embodiment 1 is mounted on a heat sink. It is sectional drawing of the direct current reactor covered with mold resin. It is a perspective view of the direct current reactor of Embodiment 2. It is sectional drawing of the direct current reactor of Embodiment 2 covered with the mold resin. It is a perspective view of the direct current reactor of Embodiment 2 covered with mold resin. It is a perspective view of the DC reactor of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil 2 Coil start part 3 Coil end part 4 Spacer 5 Comb 6 Core 7 Mounting bracket 8 Mold resin 9 Bottom plate cooling plate 10 Right side cooling plate 11 Left side cooling plate 12 Heat sink

Claims (3)

  A coil is wound on the outer periphery of the core via a spacer, the outer periphery of the coil is covered with a mold resin to generate a substantially rectangular parallelepiped or a substantially cube, and the start end and end of the coil are formed on one surface of the outer periphery of the mold resin. A direct current reactor formed by attaching a metal cooling plate to one of the other surfaces of the outer peripheral portion, and the direct current reactor built in the casing of an arc welding machine via the cooling plate An arc welding control device comprising: a heat sink on which the heat sink is mounted; and a cooling fan that blows cooling air to the heat sink, wherein the heat generated by the coil is radiated by the heat sink.   The surface of the mold resin to which the cooling plate is attached is a bottom surface, and the cooling plate is attached to at least one of four surfaces in contact with the bottom surface. Arc welding control device.   A direct-current reactor comprising the arc welding control device according to claim 1.

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