JPS626666Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reactor opening structure.

Conventionally, as shown in FIGS. 1 and 2, a dry reactor is constructed by tightening a multi-layered cylindrical coil 11 with non-magnetic steel coil clamping plates 15 provided at the top and bottom of the coil via studs 15b. .
The winding start lead conductor 12 and winding end lead conductor 13 of the coil 11 are each pulled out upward in the axial direction from the upper end of the coil 11, bent further in the radial direction, raised upward again, and connected to the ends thereof. The terminal 14 was welded. Further, the terminal 14 was fixed to a support fitting 16 attached to a coil clamping plate 15 via a support insulator 17. Note that 15a is a notch provided so that the coil clamping plate 15 does not form one turn.

However, in such a structure, the lead conductors 12, 1
Since the length of 3 becomes long, deformation is likely to occur due to electromagnetic repulsion. That is, the force F acting on each conductor is expressed by the following equation (1).

F=μμ ₀ /2π×I ₁ I ₂ /d(N/m)×(m
)...(1) Here, μ is the relative magnetic permeability of the medium between the conductors, and μ ₀ is 4
π×10 ^-7 , I ₁ , I ₂ are the currents (A) flowing through each conductor, d
is the spacing between conductors (m), and is the conductor length (m).

As can be seen from equation (1), as the length of the lead conductors 12 and 13 increases, the electromagnetic repulsive force increases. As a countermeasure to this problem, there is a method of widening the spacing between the conductors, but the conductors become longer and longer, making it difficult to obtain predetermined reactance characteristics. Furthermore, since the terminal portion protrudes from the outer periphery of the coil 11, there is a drawback that the overall size becomes large. In addition, since this type of reactor has a relatively thick conductor, it also has the disadvantage that it takes time and effort to manufacture if there are many bending operations.

It is an object of the present invention to solve the above-mentioned drawbacks and provide a reactor opening structure that is robust against electromagnetic repulsion, easy to assemble, and can be constructed in a compact size.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. As shown in the figure, the winding start lead-out conductor 1 is drawn out from the upper end of the coil 11.
2 and the winding end lead-out conductor 13 are pulled out upward in the axial direction through the notch 15a of the coil clamping plate 15, and connection terminals 14 are attached to their respective ends. Further, after inserting a spacing insulator 18 between the rising portions of the conductors 12 and 13, an insulating tape 19 made of a high-strength fiber material was wrapped and bound from the outside, and this was impregnated with resin and solidified. Above, this tensioned portion is held and fixed from the periphery by a support insulator 20 attached to the coil clamping plate 15.

With such a structure, the bent portions of the lead conductors 12 and 13 are significantly reduced and their lengths are also shortened, so that the mechanical force acting on the conductors due to the generated electromagnetic repulsion is reduced. Furthermore, the winding width and number of windings of the insulating tape 19 that binds the conductors 12 and 13 on both ends can be adjusted according to the magnitude of the electromagnetic repulsion, and this tensioning portion can be attached to the supporting insulator 20 from the surroundings. Since the conductors are fixed to the coil clamping plate 15 through the conductors, there is no risk of deformation or damage even if the spacing between the conductors becomes narrow. In addition, as mentioned above, the lead conductors 12 and 13 have few bent parts, so manufacturing is easy, and the method of supporting them is to use the notch 15a of the coil clamping plate 15 without using a support insulator or the like. Since it is fixed, the structure can be made smaller.

As described above, according to the present invention, a reactor opening structure that is robust against electromagnetic repulsion, small in size, and easy to manufacture can be obtained.

[Brief explanation of the drawing]

Figures 1 and 2 are front and side views of a conventional reactor outlet structure, Figures 3 and 4 are front and side views of a reactor outlet structure according to the present invention, and Figure 5 is the same outlet structure. FIG. 6 is a perspective view showing the opening structure in a completed assembled state. 11... Coil, 12, 13... Lead conductor,
14... Connection terminal, 15... Coil tightening plate, 1
5a... Notch, 18... Spacing insulator, 19...
Insulating tape, 20... support insulator.

Claims (1)

[Scope of utility model registration request] In a reactor in which a coil is clamped by coil clamping plates provided at the upper and lower parts of the coil, a notch is provided in a part of the circumferential direction of the coil clamping plate provided at the upper part of the coil, and a cutout is provided at the beginning and end of winding of the coil. The lead conductor is drawn upward through the notch of the coil clamping plate, and a connection terminal is attached to the end thereof, and the rising portions of the lead conductor are integrated from the outside with an insulating material interposed between the conductors. A reactor opening structure characterized in that the bundled part is fixed to a coil clamping plate on the upper part of the coil via a support insulator.