JPS638101Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a smoothing coil device used in constant frequency power supply circuits and the like in ships.

Conventionally, in this type of device, since a plurality of smoothing coils are attached to one insulating plate, the installation workability is poor, and a large installation area is required, resulting in an increase in the size of the device.

An object of the present invention is to provide the smoothing coil device that can eliminate the above-mentioned conventional problems.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. 1 is a smooth coil that compresses pure iron powder;
It consists of a sintered annular iron core 2 and a covered wire 3 wound around it, and in the illustrated example, six smooth coils 1 having the same configuration are prepared. Three smooth coils 1 are arranged in a set, and a rod-shaped member 4 is inserted through the annular core 2 of each set in a skewered manner. In order to improve the heat dissipation of each smooth coil 1, a predetermined interval is provided between adjacent annular cores 2, and in this state both rod-shaped members 4 are attached to both sides 5a, 5 of the steel plate support frame 5.
It will be constructed in two rows, upper and lower, between b.

Each rod-shaped member 4 includes a steel pipe 6 located between both sides 5a and 5b of the support frame 5, and a mounting bolt 7 passing through both sides 5a and 5b and the pipe 6,
A nut 9 is screwed into a threaded portion 7a of the mounting bolt 7, which projects from one side 5b, via a washer 8.

The head 7b of the mounting bolt 7 and the head 7b facing it,
Between the outer surface of the side 5a of the support frame 5, the side 5
Insulating bushing 10 ₁ as an insulating member on side a
The washer 11 is positioned on the side of the head 7b, and the two 10 ₁ and 11 are sandwiched between each other, and an annular convex portion 10 protrudes from one side of the insulating bushing 10 ₁ .
_1a is disposed within the insertion hole 12 of the side portion 5a. As a result, even if the mounting bolt 7 moves in a direction perpendicular to its axial direction, the side portion 5a and the mounting bolt 7 do not come into contact with each other, and therefore, the insulation between the two parts 5a and 7 is ensured.

Further, an insulating bushing 10 ₂ as an insulating member is sandwiched between the inner surface of the side portion 5 a and the end face of the pipe 6 facing thereto.
An annular convex portion _{10 2 a} protruding from one side of the pipe 6 is disposed within the opening of the pipe 6 . This allows pipe 6
Even if the mounting bolt 7 moves in a direction perpendicular to their axial directions, the side portion 5a and the pipe 6 and the pipe 6 and the mounting bolt 7 do not come into contact with each other,
Therefore, between the side portion 5a and the pipe 6 and the pipe 6
and the mounting bolt 7 are reliably insulated.
Covered wire 3 on the winding start side of each of the upper and lower smooth coils 1
The coated wires 3 at the end of the winding are separately put together into two bundles and passed through the insulating bushings 13 ₁ and 13 ₂ attached to the upper part 5c of the support frame 5, respectively.
It is pulled out and connected to a predetermined circuit.

In the above configuration, a very large pulsed current flows through each smoothing coil 1, but since the annular iron core 2 is made of a compressed sintered body of pure iron powder, overcurrent loss is extremely small. In addition, the heat dissipation of each smooth coil 1 is performed well, and the rod-shaped member 4 and the support frame 5 are insulated by the respective insulating bushings 10 ₁ and 10 ₂ .
An electric circuit is not closed between both 4 and 5, and therefore power loss can be suppressed as much as possible.

As described above, according to the present invention, the smooth coil 1 is constructed by winding the coated wire 3 around the annular core 2, and the rod-shaped member 4 is inserted in a skewered manner through the annular core 2 of a plurality of smooth coils 1, and adjacent A predetermined interval is provided between the annular cores 2, and the rod-shaped member 4 is connected to the insulating members 10 ₁ , 1
Since each smooth coil ₁ is installed on the support frame 5 through the
The device can be downsized by reducing the space it occupies. Furthermore, heat dissipation from each smooth coil 1 is performed well, and an electric circuit is not closed between the support frame 5 and the rod-shaped member 4, so that power loss can be suppressed as much as possible.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a front view, Fig. 2 is a plan view, Fig. 3 is an enlarged sectional view of the portion shown in Fig. 1, and Fig. 4 is a perspective view of a smooth coil. be. DESCRIPTION OF SYMBOLS 1... Smooth coil, 2... Annular iron core, 3... Covered wire, 4... Rod-shaped member, 5... Support frame, 10 ₁ ,
10 ₂ ... Insulating bushing as an insulating member.

Claims (1)

[Scope of utility model registration request] The coated wire 3 is wound around the annular core 2 to form a smooth coil 1.
and a plurality of annular cores 2 of the smooth coils 1.
The rod-shaped member 4 is inserted in a skewered manner through the annular core 2, and a predetermined interval is provided between the adjacent annular cores 2, and the rod-shaped member 4 is installed on the support frame 5 via the insulating members 10 ₁ and 10 ₂ . coil device.