JPS5926578Y2 - Large current inductance or choke coil - Google Patents

Description

[Detailed description of the invention] This invention is a toroidal type large current inductance or It is a choke coil.

A coil is made by winding a wire around a toroidal core made of magnetic material.Inductance and choke coils for large currents are characterized by a large toroidal core as the magnetic core.In particular, toroidal cores with an outer diameter of 60 mm and a height of 1Q mm or more are used. Since the core is large, mass productivity is poor during sintering, uniform characteristics cannot be obtained, and the cost is high.

The present invention eliminates this drawback and relates to a large current coil in which a large, particularly tall core is not used, and uniform toroidal cores with good characteristics that are easy to mass produce are stacked together as a magnetic core and wound. .

As shown in the embodiment shown in Fig. 1, the magnetic core used in the coil of the present invention consists of three stacked toroidal cores 1 with uniform characteristics that are relatively easy to mass produce, and a cushioning material 2 such as rubber between each core. Clamp and assemble.

The inductance L of the coil is given by μ for the magnetic permeability of the magnetic material, 5 cm2 for the cross-sectional area of the magnetic core, 1 cm for the magnetic path length, and N for the number of turns of the electric wire, and the inductance value increases in proportion to the cross-sectional area S. Become.

Therefore, by stacking the cores, the cross-sectional area S of the magnetic core is increased, and the inductance L can be increased.

As the material 2, it is desirable to use a material having a low dielectric constant, such as silicone rubber.

FIG. 2 shows an embodiment in which a winding 3 is applied to a magnetic core in which the core 1 and the cushioning material 2 are sandwiched and overlapped in this manner.

As a coil for high power, the winding wire inevitably becomes thicker,
Since the number of turns is reduced, it is effective to overlap the cores to increase the cross-sectional area of the magnetic core.

The purpose of the cushioning material used in this magnetic core is to relieve the pressure caused by tightening when winding is performed, thereby preventing damage to the core.

Figure 3 shows an example of a coil made in this way.
A partition plate 4 is provided between the windings of the coil.

As mentioned above, the coil of this invention has characteristics that are easy to mass-produce by stacking cores with uniform cross-sectional area.

Since it can be increased, high inductance can be obtained for large power applications.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the magnetic core of the present invention, Fig. 2 is a side view of the magnetic core of Fig. 1 wound with a wire, and Fig. 3 is a perspective view of an embodiment of the coil of the present invention. . In the figure, 1: Nidroidal core, 2: Cushioning material, 3: Winding wire, 4: Partition plate.

Claims (1)

[Scope of utility model registration request] A large current inductance or choke coil that is made by stacking multiple toroidal cores in a cylindrical shape with a cushioning material sandwiched between their respective annular surfaces, and winding the cores using them as a magnetic core.