CN-122000184-A - Inductor and inductor forming method

CN122000184ACN 122000184 ACN122000184 ACN 122000184ACN-122000184-A

Abstract

The invention relates to the technical field of inductors, in particular to an inductor and an inductor forming method. The inductor comprises a coil, a first insulator, a center pole magnetic core, a yoke magnetic core and a second insulator, wherein the first insulator is coated on the inner peripheral surface of the coil and part of the outer peripheral surface and part of the end surface of the coil, the center pole magnetic core is positioned on the inner side of the coil and is matched with the first insulator in a positioning mode, the yoke magnetic core comprises a main body part and a convex part, the convex part is arranged on one side, close to the coil, of the main body part, the convex part is positioned on the inner side of the coil and is matched with the first insulator in a positioning mode, the end surface of the convex part is attached to the end surface of the center pole magnetic core, and the second insulator is used for fixing the coil, the first insulator, the center pole magnetic core and the yoke magnetic core in a coating mode. In the inductor, the first insulator is fixed to the coil cladding, and the first insulator can be matched with the middle column magnetic core and the yoke magnetic core in a positioning way, so that the relative position precision of the coil and the magnetic core is improved, and a sufficient safe insulation distance is reserved between the coil and the magnetic core, and electric faults are not easy to occur.

Inventors

ZHAO NANNAN
REN BAOQING
LIU FUMING
Qin Lingcan
HUANG WEICHENG

Assignees

广东伊戈尔智能电器有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (10)

1. An inductor is provided, which is used for the induction of a current, characterized by comprising the following steps: A coil and a first insulator, wherein the first insulator is coated on the inner peripheral surface of the coil, and part of the outer peripheral surface and part of the end surface of the coil; A center pillar magnetic core located inside the coil, and in positioning fit with the first insulator coated on the inner peripheral surface of the coil; The yoke part magnetic core comprises a main body part and a convex part, the convex part is arranged on one side of the main body part, which is close to the coil, the convex part is positioned on the inner side of the coil and is matched with the first insulator in a positioning way, and the end face of the convex part is attached to the end face of the center pillar magnetic core; and the second insulator is used for cladding and fixing the coil, the first insulator, the center pillar magnetic core and the yoke magnetic core.
2. The inductor according to claim 1, wherein a cross-sectional area of the convex portion gradually decreases in a direction away from the main body portion.
3. The inductor according to claim 1, wherein a first groove is provided in an outer periphery of the center pillar core, the first groove communicates both ends of the coil, a second groove is provided in an outer periphery of the yoke core, the second groove communicates with the first groove, and the first groove and the second groove are filled with the second insulator.
4. An inductor according to claim 3, wherein the first recess extends in an axial direction of the coil.
5. An inductor according to claim 3, wherein the center leg core is provided with at least two first grooves, and the first grooves are spaced apart at the periphery of the center leg core.
6. An inductor according to claim 3, wherein the main body portion of the yoke core is in positioning engagement with a first insulator coated on the end face of the coil, a gap is provided between the main body portion and the end face of the coil, the gap communicates with the first and second grooves, and the gap is filled with the second insulator.
7. The inductor of any one of claims 1-6, comprising an insert secured in the second insulator.
8. The inductor according to any one of claims 1 to 6, characterized in that the coil is provided with at least two, and the coil has terminals exposed to the first insulator, the second insulator, the coils being connected in series through the terminals.
9. The inductor of any one of claims 1-6, wherein the coil has a heat dissipating surface exposed to the first insulator and the second insulator.
10. An inductor forming method based on an inductor according to any one of claims 1-9, characterized by the steps of: Performing primary injection molding on the coil to form a first insulator, wherein the first insulator is coated on the inner peripheral surface of the coil, and part of the outer peripheral surface and part of the end surface of the coil; positioning and assembling a center pillar magnetic core, a yoke magnetic core and the first insulator; And performing secondary injection molding on the assembled coil, the middle post magnetic core and the yoke magnetic core to form a second insulator, wherein the coil, the middle post magnetic core and the yoke magnetic core are fixed by the second insulator.

Description

Inductor and inductor forming method Technical Field The invention relates to the technical field of inductors, in particular to an inductor and an inductor forming method. Background An inductor is an electronic element capable of storing magnetic field energy, and has functions of filtering, energy storage, signal processing, electromagnetic interference suppression and the like in various electronic devices. The inductor generally includes a coil, a magnetic core, and an insulator that secures the coil and the magnetic core. In the forming process of some inductors, the assembly precision of the magnetic core and the coil of the inductor is not high, so that the distance between the magnetic core and the coil cannot reach the safe insulation distance, and the inductor is easy to generate electrical faults. Disclosure of Invention The invention mainly solves the problems that the assembly precision of the magnetic core and the coil of the inductor is not high and electrical faults are easy to occur. According to a first aspect, an inductor is provided in one embodiment, and includes a coil, a first insulator wrapped around an inner peripheral surface of the coil and a part of an outer peripheral surface and a part of an end surface of the coil, a center pillar core positioned inside the coil and in positioning engagement with the first insulator wrapped around the inner peripheral surface of the coil, a yoke core including a main body portion and a protrusion portion provided on a side of the main body portion near the coil, the protrusion portion positioned inside the coil and in positioning engagement with the first insulator, an end surface of the protrusion portion being in contact with the end surface of the center pillar core, and a second insulator wrapping and fixing the coil, the first insulator, the center pillar core, and the yoke core. In some embodiments, the cross-sectional area of the protrusion gradually decreases in a direction away from the body portion. In some embodiments, the outer periphery of the center pillar magnetic core is provided with a first groove, the first groove communicates two ends of the coil, the outer periphery of the yoke magnetic core is provided with a second groove, the second groove communicates with the first groove, and the first groove and the second groove are filled with the second insulator. In some embodiments, the first groove extends in an axial direction of the coil. In some embodiments, the center leg core is provided with at least two first grooves, and the first grooves are spaced apart at an outer periphery of the center leg core. In some embodiments, the main body of the yoke magnetic core is matched with a first insulator coated on the end face of the coil in a positioning way, a gap is arranged between the main body and the end face of the coil, the gap is communicated with the first groove and the second groove, and the gap is filled with the second insulator. In some embodiments, the inductor includes an insert secured in the second insulator. In some embodiments, the coil is provided with at least two, and the coil has a lead-out terminal exposed to the first insulator, the second insulator, and the coils are connected in series through the lead-out terminal. In some embodiments, the coil has a heat dissipating surface exposed to the first insulator and the second insulator. According to a second aspect, an embodiment provides an inductor forming method based on the inductor described in any one of the above embodiments, including the steps of: Performing primary injection molding on the coil to form a first insulator, wherein the first insulator is coated on the inner peripheral surface of the coil, and part of the outer peripheral surface and part of the end surface of the coil; positioning and assembling a center pillar magnetic core, a yoke magnetic core and the first insulator; And performing secondary injection molding on the assembled coil, the middle post magnetic core and the yoke magnetic core to form a second insulator, wherein the coil, the middle post magnetic core and the yoke magnetic core are fixed by the second insulator. According to the inductor of the embodiment, the first insulator is used for cladding and fixing the coil, the first insulator cladding the inner peripheral surface of the coil can be matched with the center pillar magnetic core in a positioning manner, the yoke magnetic core is provided with the boss, the boss can be matched with the first insulator in a positioning manner, the assembly precision of the coil, the center pillar magnetic core and the yoke magnetic core is improved, enough safe insulation distance is reserved between the coil, the center pillar magnetic core and the yoke magnetic core, and the inductor is not easy to generate electric faults. Drawings FIG. 1 is a schematic diagram of a coil of an inductor according to the present invention; FIG. 2 is a schematic diagram of a first insulator of