CN217426515U

CN217426515U - High-strength electric magnetic core

Info

Publication number: CN217426515U
Application number: CN202220170687.3U
Authority: CN
Inventors: 程家洪
Original assignee: WUHAN CHENYANG ELECTRONIC TECHNOLOGY CO LTD
Current assignee: WUHAN CHENYANG ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-09-13
Anticipated expiration: 2032-01-21

Abstract

The utility model discloses an electric magnetic core of high strength in PFC inductance technical field, include: a magnetic core assembly; the rubber coating layer, the rubber coating layer cladding is in on the outer wall of magnetic core, the magnetic core subassembly includes: a magnetic core; the inner chamfer is arranged at the upper edge and the lower edge of the inner ring of the magnetic core; outer chamfer, outer chamfer is seted up two edges about the outer loop of magnetic core, interior chamfer with outer chamfer is 45 chamfers, the magnetic core includes: a magnetic core body; the lacquer layer, the cladding of lacquer layer is in on the lateral wall of magnetic core body, the thickness of lacquer layer is 0.3mm, the structure cladding that the rubber coated layer becomes spiral stack is in on the lateral wall of magnetic core subassembly, the utility model discloses do the chamfer processing to the edge of the inner ring of magnetic core and outer loop, avoid the magnetic core to cause the damage to the enameled wire, the effectual electric strength grade that has improved.

Description

High-strength electric magnetic core

Technical Field

The utility model relates to a PFC inductance technical field specifically is an electric magnetic core of high strength.

Background

PFC is "power factor correction" and power factor refers to the relationship between real power and total power consumption (apparent power), i.e., the ratio of real power divided by total power consumption (apparent power). Basically, the power factor can measure the effective utilization degree of the power, and when the power factor value is larger, the power utilization rate is higher. The power factor is a parameter for measuring the power efficiency of the electric equipment, and the low power factor represents the low power efficiency. A technique for increasing the power factor of a powered device is known as power factor correction. The computer switching power supply is a capacitance input type circuit, and the phase difference between the current and the voltage thereof can cause the loss of exchange power, so that a PFC circuit is required to improve the power factor. There are two types of current PFCs, one is a passive PFC (also called passive PFC) and an active PFC (also called active PFC), and the passive PFC is generally divided into an "inductance compensation type" and a "valley filling circuit type (valley filling circuit)"

The "inductance compensation type" is a type in which a phase difference between a fundamental current and a voltage of an ac input is reduced to improve a power factor, and includes a mute type and an unmute type. The power factor of the inductance compensation type can only reach 0.7-0.8, and the inductance compensation type power factor is generally near a high-voltage filter capacitor. The valley filling circuit type passive power factor correcting circuit features that the valley filling circuit behind the rectifier bridge is used to increase the conduction angle of rectifier tube greatly, and the valley filling point is used to change the input current from peak pulse to waveform close to sine wave, so increasing the power factor to about 0.9 and lowering the total harmonic distortion obviously. Compared with the traditional inductive passive power factor correction circuit, the inductive passive power factor correction circuit has the advantages of simple circuit, obvious power factor compensation effect and no need of using a large inductor with large volume and heavy weight in an input circuit.

The active PFC consists of an inductance capacitor and an electronic component, has small volume, and compensates the phase difference between current and voltage by adjusting the waveform of current through a special IC. Active PFC can achieve higher power factor-typically over 98%, but is also relatively costly. In addition, the active PFC can also be used as an auxiliary power source, so that a standby transformer is not needed in the active PFC circuit, and the ripple of the output dc voltage of the active PFC circuit is very small, which does not need to use a large-capacity filter capacitor.

Magnetic core refers to a sintered magnetic metal oxide composed of various iron oxide mixtures. Manganese-zinc ferrite and nickel-zinc ferrite are typical magnetic core materials. The manganese-zinc ferrite has the characteristics of high magnetic permeability and high magnetic flux density and has the characteristic of lower loss. Nickel-zinc ferrite has the characteristics of extremely high resistivity, low magnetic permeability of less than several hundred, and the like. Ferrite cores are used in coils and transformers for various electronic devices.

The outer ring and the inner ring of the existing magnetic core are not chamfered and are in a 90-degree shape, so that the enameled wire is wound on the magnetic core and is easy to crack, the phenomenon of electrical breakdown is caused, and the electrical strength of the magnetic core is seriously influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric magnetic core of high strength to solve outer loop, the inner ring of the current magnetic core that proposes in the above-mentioned background art and all not chamfer, become 90 shapes, lead to the enameled wire around putting the phenomenon of ftractureing easily appearing on the magnetic core, the phenomenon that causes electric breakdown appears, has seriously influenced the problem of the electric strength of magnetic core.

In order to achieve the above purpose, the utility model provides a following technical scheme: a high strength electrical magnetic core comprising:

a magnetic core assembly;

and the encapsulating layer is coated on the outer wall of the magnetic core.

Preferably, the magnetic core assembly comprises:

a magnetic core;

the inner chamfer is arranged at the upper edge and the lower edge of the inner ring of the magnetic core;

and the outer chamfer is arranged at the upper edge and the lower edge of the outer ring of the magnetic core.

Preferably, the inner chamfer and the outer chamfer are both 45 ° chamfers.

Preferably, the magnetic core includes:

a magnetic core body;

and the paint layer is coated on the side wall of the magnetic core body.

Preferably, the thickness of the paint layer is 0.3 mm.

Preferably, the encapsulating layer is wrapped on the outer side wall of the magnetic core assembly in a spiral laminated structure.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses do the chamfer processing to the edge of the inner ring of magnetic core and outer loop, avoid the magnetic core to cause the damage to the enameled wire, the effectual electrical strength grade that has improved, interior chamfer and outer chamfer are 45 chamfers, the enameled wire cladding is when on the magnetic core, 45 chamfers can not cause the damage to the enameled wire, the phenomenon that the lacquer layer damage of having avoided the enameled wire caused electrical breakdown appears, the effectual electrical strength who promotes the magnetic core, and the lacquer layer that is greater than 0.3mm on the magnetic core body can protect the enameled wire through can, avoid causing the damage of enameled wire, promote the electrical strength of magnetic core.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the magnetic core assembly of the present invention;

FIG. 3 is a schematic view of the magnetic core structure of the present invention;

fig. 4 is a schematic diagram of the adhesive coating layer of the present invention.

In the figure: 100 magnetic core components, 110 magnetic cores, 111 magnetic core bodies, 112 paint layers, 120 inner chamfers, 130 outer chamfers and 200 encapsulating layers.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides an electric magnetic core of high strength makes the chamfer processing to the edge of the inner ring of magnetic core and outer loop, avoids the magnetic core to cause the damage to the enameled wire, the effectual electric intensity level that has improved please refer to figure 1, include: a magnetic core assembly 100 and an encapsulating layer 200;

referring to fig. 1-3, magnetic core assembly 100 includes:

a magnetic core 110, the magnetic core 110 comprising:

a magnetic core body 111;

the paint layer 112 is coated on the side wall of the magnetic core body 111, the thickness of the paint layer 112 is 0.3mm, and the paint layer 112 can only be thicker than 0.3mm and cannot be thinner than 0.3 mm;

the inner chamfer 120 is arranged at the upper edge and the lower edge of the inner ring of the magnetic core 110;

the outer chamfers 130 are arranged at the upper edge and the lower edge of the outer ring of the magnetic core 110, the inner chamfer 120 and the outer chamfer 130 are chamfers of 45 degrees, when the enameled wire is coated on the magnetic core 110, the enameled wire cannot be damaged by the chamfers of 45 degrees, the phenomenon that electrical breakdown is caused by damage of a paint layer of the enameled wire is avoided, the electrical strength of the magnetic core is effectively improved, the enameled wire can be protected by the paint layer larger than 0.3mm on the magnetic core body 111, damage of the enameled wire is avoided, and the electrical strength of the magnetic core is improved;

referring to fig. 1-4, an encapsulating layer 200 is coated on an outer wall of a magnetic core 110, the encapsulating layer 200 is coated on an outer side wall of the magnetic core 110 in a spiral laminated structure, a conventional magnetic core encapsulating layer is coated with a 0.08mm thick polyester film adhesive tape, and since the adhesive tape is thick and a gap is left in the encapsulating process, in order to solve the above problem, the encapsulating layer 200 in the present application is a transparent PET adhesive tape with a thickness of 0.05mm, and is coated on an outer side wall of the magnetic core 110 in a spiral laminated manner, the PET adhesive tape has a better damage resistance grade than a normal polyester film adhesive tape, so that an electrical breakdown phenomenon caused by exposure of the magnetic core due to abrasion of the adhesive tape is avoided, and the encapsulating layers 200 are laminated together without a gap, so that an electrical breakdown phenomenon caused by non-contact at an overlapping portion can be effectively avoided, the electrical strength is improved, and the thickness of the adhesive tape is reduced, the chamfer angle is changed to be small, so that the consumption of the enameled wire after the change is reduced, and the material cost is reduced.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. An electrical magnetic core of high strength, characterized by: the method comprises the following steps:

a magnetic core assembly (100), the magnetic core assembly (100) comprising:

a magnetic core (110);

the inner chamfer (120) is arranged at the upper edge and the lower edge of the inner ring of the magnetic core (110);

the outer chamfer (130) is arranged at the upper edge and the lower edge of the outer ring of the magnetic core (110);

the rubber coating layer (200) is coated on the outer wall of the magnetic core component (100).

2. A high strength electrical core, as claimed in claim 1, wherein: the inner chamfer (120) and the outer chamfer (130) are both 45 degree chamfers.

3. A high strength electrical core as defined in claim 2, wherein: the magnetic core (110) includes:

a magnetic core body (111);

a paint layer (112), the paint layer (112) being coated on the side wall of the magnetic core body (111).

4. A high strength electrical core as defined in claim 3, wherein: the thickness of the paint layer (112) is 0.3 mm.

5. A high strength electrical core, according to claim 4, wherein: the rubber coating layer (200) is coated on the outer side wall of the magnetic core component (100) in a spiral laminated structure.