JPH0642329Y2 - Common choke coil for 3 phases - Google Patents

Description

[Detailed Description of Device] a. OBJECT OF THE INVENTION [Industrial field of application] The present invention relates to the structure of a common choke coil for preventing electromagnetic noise used in a three-layer power supply line.

[Conventional technology]

Conventionally, a large-sized common choke coil having the structure shown in FIG. 3 has been connected to a three-phase power supply line having a large current of, for example, 50 A to 100 A. Through a central hole of a toroidal core housed in an insulating case, a copper strip (for example, width 5 mm, thickness 1 mm, the figure shows one copper strip, but use the number corresponding to the required current capacity) Wind the individual windings in the same phase, pull out the winding start and winding end in opposite directions in the axial direction of the toroidal core, insert an insulating tube (not shown) into the lead wire, and crimp round the end of the lead wire. A common choke coil element 1 (hereinafter referred to as a coil element) to which a template terminal (not shown) is attached is made.

A silicon rubber plate 3 is placed in the center of a metal base plate 2 (hereinafter referred to as a base plate) having mounting holes near the four corners, and a coil element 1 is placed vertically thereon (so that the axial direction of the core is horizontal). Put it on) and place it.

A silicon rubber plate 5 is lined, and both ends are bent inward at right angles to cover the outer circumference of the coil element 1 and the fixing metal piece 4 is fixed to the base plate 2 with screws. Small L-shaped metal fittings 6 with silicon rubber plates 7 are fixed to the base plate 2 on both sides of the end face of the coil element 1 and the coil element 1 is mounted on the base plate 2.
Was fixed.

[Problems to be solved by the device]

In the case of the coil described above, the connection with the power supply line is performed by superposing the crimped round plate terminals of both the coil and the power supply line in the air, inserting the screw, and tightening the nut. Since such a wire connection work in the air involves position adjustment and insulation treatment of the wire after the wire connection, there is a problem that a skilled worker and a lot of man-hours are required.

B. Configuration of the Invention [Means for Solving the Problems] In the invention, a plurality of strip-shaped terminals are radially arranged on the periphery of an insulating circular base plate, and one end of the strip-shaped terminals is placed outside the base plate. Using a base plate protruding and fixed to the base plate, a toroidal core on which a three-phase common choke coil element in which three windings are individually wound is placed concentrically, and the end of the winding is Is connected to the other end of the terminal of the base plate.

[Action]

The plate terminals arranged on the base plate relay-connect the coil element and the power supply line at a fixed position. The lead wire of the coil element winding fixes the coil element itself in a flat plate-like manner.

〔Example〕

 An embodiment of the present invention will be described below.

FIG. 1 is a plan view and FIG. 2 is a schematic external view.
The coil element 1 is used horizontally (the axial direction of the toroidal core is set vertically).

The coil element 1 includes three windings each having a copper strip as a winding material in a portion equally divided by a partition 8 on the surface of an insulating case accommodating a toroidal core and a Y-shaped central partition plate 9 or the like. 1
It is 0,11,12 wound in phase.

The winding start lead wires 10a, 11a, 12a are drawn from the vicinity of the partition 8 on the lower end side of the coil element 1 in three directions in the radial direction of the core in three directions, and crimped round plate terminals 13 are attached to predetermined end portions, respectively. Has been.

The end-of-winding lead wires 10b, 11b, 12b are drawn out isotropically in three directions in the radial direction of the core on the upper end side of the coil element 1, bent downward at a right angle along the outer circumference of the coil element 1, and near the lower end surface. Are bent horizontally, and crimping round plate terminal 13 is attached to each end. (See Figure 2).
Figure 2 shows only the winding 10 and the winding start lead wire 10a.
And a main part of the winding end lead wire 10b. In FIGS. 1 and 2, the insulating tube fitted into the lead wire is not shown.

The insulating circular base plate 14 (hereinafter referred to as a circular base plate) is a thick plate made of an insulating material, and has a diameter sufficiently larger than the outer dimensions of the coil element 1. A circular base plate 14 with 6 pieces of strip-shaped terminals 15 having through holes at both ends as a set.
Are radially arranged at equal intervals on the periphery of the base plate, one end of the base plate is projected out of the circular base plate 14 and is fastened by a spigot 16. The through hole at one end of the strip-shaped terminal 15 is located at a position slightly away from the peripheral surface of the circular base plate 14, and the through hole at the other end communicates with the screw hole 17 (see FIG. 2) of the circular base plate 14. It is in a position to Mounting holes 18 (two of three are shown in FIG. 2) are provided between the three sets of strip-shaped terminals 15.

Make sure that the round part of the crimping round plate terminal 13 of the winding start lead wires 10a, 11a, 12a with a small routing range fits into the through hole (screw hole 17 of the circular base plate 14) at the other end of the strip terminal 15. , Circular base plate
The coil element 1 is placed concentrically on 14 and the crimping round plate terminal 13 is connected to the strip-shaped terminal 15 by screws 19 respectively. The coil element 1 is fixed to the base plate in a state where there is very little room for movement by being restrained from three isotropic directions. Winding end lead wire 10b,
Similarly, 11b and 12b are connected to the strip terminals 15 to complete the assembly of the coil. Since the winding end lead wires 10b, 11b, 12b restrain the coil element 1 from three isotropic directions different from the winding start lead wires 10a, 11a, 12a, the coil element 1 is fixed to the circular base plate 14 in the end. Become.

Since the coil is assembled in this way, it is easy to connect a crimping round plate terminal or the like attached to the power supply line to the through hole outside the strip-shaped terminal 15.

C. Effect of the Invention The three-phase common choke coil according to the present invention is a structure that takes advantage of the characteristics of the three-phase common choke coil, in which three windings are wound in the same phase, and connection work with the power supply line can be performed easily and in a short time. The economic effects that can be achieved are significant.

[Brief description of drawings]

1 and 2 are external views showing an embodiment of the present invention. FIG. 1 is a plan view and FIG. 2 is a perspective view. FIG. 3 is an external perspective view showing a conventional example. 1 ... Common choke coil element, 2 ... Metal base plate, 3, 5,
7 ... Silicon rubber plate, 4 ... Fixing bracket, 6 ... L-shaped fitting,
8 ... Partition, 9 ... Central partition, 10, 11, 12 ... Winding, 10a,
11a, 12a ... winding start lead wire, 10b, 11b, 12b ... winding end lead wire, 13 ... crimp round plate terminal, 14 ... insulating circular base plate,
15 ... Strip-shaped terminal, 16 ... Stop, 17 ... Screw hole, 18 ... Mounting hole, 19 ... Screw.

Claims (1)

[Scope of utility model registration request] 1. A common choke coil element in which three windings are separated from each other and wound around a toroidal core, and a plurality of strip-shaped terminals have one end projecting outwardly and arranged radially in a peripheral portion. An insulating circular base plate is provided, the common choke coil element is placed concentrically on the insulating circular base plate, and the ends of the windings are connected to the other ends of the strip terminals, respectively. Three-phase common choke coil that is combined and combined.