CN106898473B - A kind of lattice coil - Google Patents

Abstract

The invention discloses a multi-layer coil, comprising: a bottom surface, a winding wire and several ring-shaped components, the bottom surface is sheet-shaped, the outer surface of the winding wire is coated with insulating varnish, and the several ring-shaped components form a concentric array, The ring-shaped member is bonded or integrally formed with the upper side of the bottom surface, a groove is formed between the ring-shaped members, and the winding wire is inserted into the groove, and the ring-shaped member is a magnetically permeable material member. The ring-shaped member made of magnetically permeable material is used as the coil core, which increases the inductance of the coil, correspondingly reduces the number of turns of the coil, and reduces the volume of the coil.

Description

a multilayer coil

technical field

The invention relates to a coil, in particular to a multilayer coil.

Background technique

Coils are generally used in electronic equipment. For example: primary winding coil and secondary winding coil of transformer, charging coil of wireless charger, AC and DC coil in AC and DC motor, etc. Among them, the coil as a wireless charger requires a large inductance. In order to meet the requirements, the existing wireless charging coils all use multi-layer coils. In order to provide greater inductance, the existing multi-layer coils have many turns and large volume. Suitable for printed circuit boards with small space occupation. Under the trend of miniaturization of wireless charging systems, such space-occupied wireless charging coils will inevitably restrict the development and promotion of wireless charging system technology. The industry often adopts the method of reducing the inductance of the coil to solve the problem of the large volume of the wireless charging coil. However, this method is at the cost of reducing the power, which is obviously not worth the candle. Coil volume, the inventor has developed a multi-layer coil with large inductance and small volume after years of attempts.

Contents of the invention

The purpose of the present invention is to provide a multi-layer coil with large inductance and small volume.

The solution of the present invention to solve its technical problem is: a multi-layer coil, including: a bottom surface, a winding wire and several ring members, the bottom surface is sheet-shaped, the outer surface of the winding wire is coated with insulating varnish, and the several The ring-shaped members form a concentric array, and the ring-shaped members are bonded or integrally formed with the upper side of the bottom surface. Grooves are formed between the ring-shaped members, and the winding wires are inserted into the grooves. The ring-shaped members The component is a magnetically permeable material component.

As a further improvement of the above technical solution, the annular member is a silicon steel member, the bottom surface is bonded to the annular member, and the bottom surface is a magnetically conductive and insulating member.

As a further improvement of the above technical solution, the ring-shaped component is further divided into several independent arc-shaped components.

As a further improvement of the above technical solution, the magnetically conductive insulating member is a rubber magnetic member.

As a further improvement of the above technical solution, the winding wire includes a first winding wire and a second winding wire, the wire diameter of the first winding wire is smaller than that of the second winding wire, and the first winding wire and the second winding wire are arranged side by side , the heads of the first and second winding wires are connected, and the tails of the first and second winding wires are connected.

As a further improvement of the above technical solution, immersion tin is provided at the junction of the head and the tail.

The beneficial effects of the present invention are: to provide a multi-layer coil, using a ring-shaped member made of magnetically permeable material as a coil core, which increases the inductance of the coil, correspondingly reduces the number of turns of the coil, and reduces the volume of the coil.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings that need to be used in the description of the embodiments. Apparently, the described drawings are only some embodiments of the present invention, not all embodiments, and those skilled in the art can obtain other designs and drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of a multilayer coil;

Fig. 2 is a structural schematic diagram of an independent arc-shaped member of a multilayer coil;

Fig. 3 is a schematic diagram of the structure of the winding wire.

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection/connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the invention can be combined interactively on the premise of not conflicting with each other.

Embodiment 1, referring to Fig. 1, a multi-layer coil, including a sheet-shaped bottom surface 1, winding wire 2 and several ring members 3, wherein the winding wire 2 adopts enameled wire that is heated and self-adhesive, and the so-called enameled wire is an important part of the winding wire. Variety, consisting of bare wire and insulating layer, the bare wire is annealed and softened, and then painted and baked many times. Referring to Fig. 3, the winding wire 2 is composed of two winding wires, namely a first winding wire a1 and a second winding wire a2, wherein the diameter of the second winding wire a2 is larger than that of the first winding wire a1, and the first and second winding wires The wires a1 and a2 are arranged side by side, the heads of the first and second winding wires a1 and a2 are connected, and the tails of the first and second winding wires a1 and a2 are connected, so that the winding wire structure with one large and one small wire diameter can reduce the gap between coil turns. Distributed capacitance, improve the quality factor of the coil. As an optimization, immersion tin is provided at the head and tail of the first and second winding wires a1 and a2 to facilitate coil welding.

The ring members 3 form a concentric array and are bonded with the bottom surface 1 by resin glue or in an integrated structure, and grooves 4 are formed between the ring members 3, and the winding wires 2 are sunk into the grooves 4, so The annular member 3 is a magnetically permeable material member.

The structure of this multilayer coil, because the reluctance of the annular member 3 is very low, enables the annular member 3 to gather a large number of magnetic force lines, reduce the outward dispersion of the magnetic force lines, and increase the magnetic force line density in the effective induction area. Under the premise of not changing, the inductance is increased. Since the annular member 3 is used as an auxiliary, under the same inductance, the number of turns of the coil is correspondingly reduced, and the volume of the coil is reduced.

As an optimization, resin glue is used to bond the bottom surface 1 and the ring-shaped member 3, the ring-shaped member 3 is used as a silicon steel member, and the bottom surface 1 is used as a magnetically conductive and insulating member. In this embodiment, a rubber magnetic member is used. In this way, the several ring members 3 are magnetically conductive but insulated, which reduces the eddy current loss of the coil during operation.

Referring to FIG. 2 , in order to further reduce the eddy current loss, as an optimization, the annular member 3 is divided into several independent arc-shaped members 31 .

The preferred embodiments of the present invention have been described in detail above, but the invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent modifications or replacements without violating the spirit of the present invention. , these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (4)

1. a kind of lattice coil, which is characterized in that including：Bottom surface, winding wire and several annular components, the bottom surface are sheet, The winding wire outer surface coats insulated paint, and several annular components form concentric arry, the annular component and the bottom The upper side bonding in face is integrally formed, and is formed a groove between the annular component, the winding wire is absorbed in the groove portion, described Annular component is permeability magnetic material component, and the annular component is silicon steel component, and the bottom surface is Nian Jie with the annular component, described Bottom surface is magnetic conduction insulating component, and the annular component is further segmented as several independent arcuation components.

2. a kind of lattice coil according to claim 1, it is characterised in that：The magnetic conduction insulating component is rubber magnet structure Part.

3. a kind of lattice coil according to claim 1, it is characterised in that：The winding wire includes the first winding wire and the Two winding wires, the line footpath of first winding wire are less than the second winding wire, first winding wire and the second winding wire side by side, institute The head for stating first and second winding wire is connected, and the tail portion of first and second winding wire is connected.

4. a kind of lattice coil according to claim 3, it is characterised in that：The head, tail portion connecting place are equipped with wicking.