KR20190058402A - Core to replace air gap - Google Patents
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- KR20190058402A KR20190058402A KR1020190055342A KR20190055342A KR20190058402A KR 20190058402 A KR20190058402 A KR 20190058402A KR 1020190055342 A KR1020190055342 A KR 1020190055342A KR 20190055342 A KR20190055342 A KR 20190055342A KR 20190058402 A KR20190058402 A KR 20190058402A
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- air gap
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/08—Cores, Yokes, or armatures made from powder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
Abstract
Description
[0001] 본 발명은 리액터 제작시 적용되는 Air gap 물질(에폭시 판류, 비석면판)을 대신하는 Core를 제작하는 방법에 대한 기술이다 TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a core in place of an air gap material (epoxy plate, non-asbestos plate)
[0002] 리액를 제작할 때 사용되는 코아의 투자율은 수십 μ에서 수천 μ를 가지고 있다. 스위칭 주파수의 영역은 수 kHz에서 수백 kHz로 나뉘게 되고, 각 주파수의 영역에 따라 적용되는 코아가 정해져 있다. [0002] The magnetic permeability of a core used for producing a liquid is in the range of several tens of microns to several thousands of microns. The range of the switching frequency is divided into several kHz to several hundreds of kHz, and the applied core is determined according to the area of each frequency.
[0003] 수학식 1은 인덕턴스를 계산하는 식을 나타내었다. 이 식을 근거하에 리액터를 제작하게 되면 코아가 포화 되기 때문에 Leg Core중간에 Air gap 을 넣어, Core 포화를 막아 더 많은 전류를 흘릴 수 있게 한다. 수학식 2는 gap이 포함된 인덕턴스 계산식을 나타내었다. Equation (1) shows an equation for calculating inductance. If the reactor is made based on this formula, the core will be saturated, so an air gap is inserted in the middle of the leg core to prevent the core saturation and allow more current to flow. Equation (2) shows an inductance calculation formula including a gap.
N은 권선 수(Winding Turns), N is the number of windings,
μ는 투자율(permeability), mu is the permeability,
Ac는 코아의 단면적,Ac is the cross-sectional area of the core,
MPL은 자로 길이(Magnetic path length)MPL has a magnetic path length,
는 gap의 길이, The length of the gap,
L은 인덕턴스(Inductance)이다.L is the inductance.
[0004] Core에 Air gap 이 넣게 되면, Core 포화를 막고, 많은 전류를 흘릴 수 있지만, gap 에서 발생하는 누설자속(Leakage Flux)으로 인해 Coil에 자화손실(Magnetization loss)이 발생하여 동손(Copper Loss)을 증가 시킨다. 또는 대 전류(1,000 A 이상)를 흐르게 되면 Air gap 의 크기가 커지게 되고, 이를 분할하게 되어 코아를 작업하는 공정 및 가공 단가가 상승한다. When an air gap is inserted in the core, the core saturation can be prevented and a large amount of current can be flowed. However, due to a leakage flux occurring in the gap, a magnetization loss occurs in the coil, ). Or a large current (1,000 A or more) flows, the size of the air gap becomes large, and the air gap becomes large, so that the process of working the core and the processing cost increase.
[0005] 이때 Air gap의 기능을 갖는 Core를 적용하게 된다면, Air gap을 삽입하지 않고도 코아가 포화되지 않는 리액터를 제작 할 수 있고, 대전류 리액터 제작시에 Air gap 의 사이즈를 작게하여 생산성 및 원가 절감을 할 수 있다. In this case, if a core having an air gap function is applied, it is possible to manufacture a reactor in which the core is not saturated without inserting an air gap, and the size of the air gap is reduced when a large current reactor is manufactured, can do.
[0006] 기존에 리액터의 Air gap으로 사용하던 재료(에폭시류나 비석면판)를 대처할 투자율이 수 μ의 값을 갖는 코아를 제작한다. [0006] A core having a permeability value of several micrometers to cope with a material (an epoxy or a non-asbestos plate) conventionally used as an air gap of a reactor is manufactured.
[0007] 금속분말(sendust, Megaflux, CIP(철 분말), Ni-Fe, 아몰퍼스 합금, 페라이트 등등) 과 반성체 (비스무스(Bi), 납(Pb), 수은(Hg), 구리(Cu), 흑연(C), 금(Au), 은(Ag) 등 ) 또는 상자성체( 알루미늄·주석·백금·이리듐 등)을 조합하여 코아를 제작 한다. (Bi, Pb, Hg, Cu, and the like) and metal powders (sendust, Megaflux, CIP (iron powder), Ni-Fe, amorphous alloy, A core is formed by combining graphite (C), gold (Au), silver (Ag), etc.) or a paramagnetic material (aluminum, tin, platinum, iridium, etc.).
[0008] 투자율이 낮은 코아를 제작하는 방법으로 프레스를 이용하여 형상을 찍거나, 열경화 수지(에폭시류), 열가소성 수지(아크릴류, 폴리에스테드류)와 경화제를 섞어 조합하는 방법 그리고 금형 프레스로 압착하거나, 열에 강한 PPS 플라스틱 분말을 함께 사용하여 사출,압출 그리고 압착하는 방법이 있다.[0008] As a method of manufacturing a core having a low permeability, there is a method of forming a shape using a press, a method of mixing a thermosetting resin (epoxy), a thermoplastic resin (acrylic or polyester) with a curing agent, Extrusion, and compression using a heat-resistant PPS plastic powder.
[0009] 본 발명에 따르면, 리액터의 Air gap을 제거 하거나 작게하여 Leakage flux의 영향으로 발생한 코일의 와전류 손실이 제거 또는 감소시켜 동손(Copper Loss)을 최소한으로 할 수 있다. According to the present invention, it is possible to eliminate or reduce the air gap of the reactor, thereby eliminating or reducing the eddy current loss of the coil caused by the leakage flux, thereby minimizing copper loss.
[0010] Air gap으로 주 용도로하던 에폭시 판류와 비석면(종이류)의 두께가 생산과정 및 계절(습도)에 다라 두께가 변하기 때문에 동일한 모델을 여러대 양산 시 각 제품의 리액터의 인덕턴스 오차가 발생한다. 본 발명에 적용된 Core를 적용하면 오차율을 제거 또는 최소화 할 수 있다. Since the thickness of epoxies and non-asbestos (papers) used for air gaps mainly depends on the production process and season (humidity), the inductance error of reactors of each product occurs when the same model is mass- do. The error rate can be eliminated or minimized by applying the core applied to the present invention.
[0011] 리액터의 gap 에서 발생하는 Leakage Flux 영향으로 EMI 노이즈가 발생하여 회로에서 주고받은 통신에 영향을 주어 제품의 오작동을 일으킬 수 있어 본 발명에 적용된 Core를 적용하면 EMI 노이즈 발생을 억제 할 수 있다.EMI noise is generated due to the leakage flux generated in the gap of the reactor, which may cause communication errors in the circuit and cause malfunction of the product. Therefore, EMI noise generation can be suppressed by applying the core applied to the present invention .
[0012] 다수의 Air gap 삽입시 코아의 가공(코아 절단, 코아 조립, 형상 유지)시간을 최소한으로 단축하여 리액터의 원가 절감 및 생산속도를 높일 수 있다.When inserting a large number of air gaps, it is possible to shorten the time required for core processing (core cutting, core assembly, shape retention) to a minimum, thereby reducing the reactor cost and increasing the production speed.
[0013] 도 1은 금속 분말로 제작된 투자율이 낮은 코아의 구성을 설명하였다.
[0014] 도 2는 금속분말에 상자성체, 반 자성체가 조합된 그림을 설명하였다. [0013] FIG. 1 illustrates a structure of a core having a low permeability, which is made of a metal powder.
[0014] FIG. 2 illustrates a combination of a paramagnetic material and a semi-magnetic material in a metal powder.
[0015] 본 고안은 투자율을 작은(10μ 이하) Core를 제작하는 방법을 설명한다. 본 그림을 통한 특정한 실시 형태에 대해 한정하는 것은 아니며, 본 발명의 기술 범위에 포함되는 전반적인 것이 이해되어야 하고, 본 발명에 대해 한정하려는 것이 아니다. The present invention describes a method of manufacturing a core having a small permeability (10 μm or less). It is to be understood that the invention is not to be limited to the specific embodiments thereof with reference to the accompanying drawings, but is to be understood in all aspects as embodied and broadly described.
[0016] 도 1은 본 발명에 청구항 1에 따른 강자성체(100) 금속분말 (sendust, Megaflux, CIP(철 분말), Ni-Fe, 아몰퍼스 합금, 페라이트 등등) 의 단일 또는 조합된 구성을 나타내고 있다. FIG. 1 shows a single or combined configuration of a ferromagnetic (100) metal powder (sendust, Megaflux, CIP (iron powder), Ni-Fe, amorphous alloy, ferrite, etc.) according to claim 1 of the present invention.
[0017] 도 2는 강자성체(100)인 분말금속 이외에 상자성체(200) 와 자성체(300)를 조합 된 구조를 나타내고 있다. 각 분말의 특성에 따라 사이즈가 같거나 다르게 구성될 수 있다. FIG. 2 shows a structure in which a
[0018] Core 이 형상을 유지하기 위해 열경화 또는 열가소성 수지(400)를 경화제를 섞어 유지하는 방법이나, 프레스 기기를 이용하여 압착 하거나 또는 PPS 와 같은 플라스틱 분말(500)과 함께 사출,압출,압연 방법이 있다.In order to maintain the shape of the core, a thermosetting or
[0019]
100 : 강 자성체
200 : 상 자성체
300 : 반 자성체
400 : 열경화 또는 열가소성 수지
500 : 플라스틱 분말[0019]
100: ferromagnetic material
200: phase magnetic substance
300: Semi-magnetic material
400: thermosetting or thermoplastic resin
500: Plastic powder
Claims (3)
강 자성체를 금속분말(sendust, Megaflux, CIP(철 분말), Ni-Fe, 아몰퍼스 합금, 페라이트 등등)을 단일 또는 조합 후에 열경화 수지(에폭시류), 열가소성 수지(아크릴류, 폴리에스테드류)와 경화제를 섞어 상온 또는 그 이상의 온도로 열을 가하여 삼각형 형태의 모양을 제작하는 것.How to make core with function of air gap
(Ferrite), thermoplastic resin (acrylics, polyester dyes) and the like after single or a combination of metal powders (sendust, Megaflux, CIP (iron powder), Ni-Fe, amorphous alloy, Mixture of hardener and heat at room temperature or higher to produce triangular shape.
강 자성체 뿐만 아니라 반성체 (비스무스(Bi), 납(Pb), 수은(Hg), 구리(Cu), 흑연(C), 금(Au), 은(Ag) 등 );
상자성체( 알루미늄·주석·백금·이리듐 등)분말을 일정 비율로 조합하여 투자율을 수μ를 갖는 코아를 제작 하는 것.
The method according to claim 1,
(Bi, Pb, Hg, Cu, graphite (C), gold (Au), silver (Ag), etc.) as well as a ferromagnetic material;
A combination of paramagnetic materials (aluminum, tin, platinum, iridium, etc.) powders at a certain ratio to produce a core having a permeability of several microns.
본 코아를 제작하는 방법으로 열경화 수지, 열가소성 수지이외에
PPS 와 같은 플라스틱 분말과 함께 사출,압출,압연 방법 및 프레스로 압착하는 방법이 있다.
The method according to claim 1,
In addition to thermosetting resins and thermoplastic resins,
Injection molding, extrusion, rolling, and pressing with a plastic powder such as PPS.
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