WO2015068265A1 - 電磁誘導機器 - Google Patents
電磁誘導機器 Download PDFInfo
- Publication number
- WO2015068265A1 WO2015068265A1 PCT/JP2013/080261 JP2013080261W WO2015068265A1 WO 2015068265 A1 WO2015068265 A1 WO 2015068265A1 JP 2013080261 W JP2013080261 W JP 2013080261W WO 2015068265 A1 WO2015068265 A1 WO 2015068265A1
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- WIPO (PCT)
- Prior art keywords
- electromagnetic induction
- metal member
- induction device
- secondary winding
- primary winding
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/303—Clamping coils, windings or parts thereof together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2814—Printed windings with only part of the coil or of the winding in the printed circuit board, e.g. the remaining coil or winding sections can be made of wires or sheets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
Definitions
- the present invention relates to an electromagnetic induction device incorporated in, for example, a power converter.
- Power converters such as DCDC converters and chargers installed in electric and hybrid vehicles are equipped with electromagnetic induction devices such as transformers, reactors, and choke coils as passive components that perform voltage step-up and step-down operations. It is used for energy storage, emission element, or DC current smoothing.
- electromagnetic induction device a structure that can be miniaturized or efficiently dissipate heat generated during energization is very important.
- the primary winding and the secondary winding are configured in a laminated structure, and the secondary winding is separated from the insulating member, and at least two locations in the axial direction of the bobbin surrounding the core What realized the miniaturization by winding in divided is known (for example, refer to patent documents 1).
- the reactor body As a reactor with excellent heat dissipation, the reactor body is stored in an aluminum case, and the reactor body is sealed with a filling resin having a thermal conductivity of 0.7 to 4.0 [W / m / K]. It is known that heat generated from the coil can be efficiently dissipated to the case and the cooler, and further, heat generated from the core can be efficiently dissipated by adopting a bobbinless structure. (For example, refer to Patent Document 2).
- Patent Document 1 the primary winding and the secondary winding are stacked and wound to increase the degree of coupling between the windings. Although it is possible to reduce the size by winding it in two or more locations in the axial direction, since the winding is wound in a multi-layer structure, the inner winding near the core is located outside the winding. There was a problem that heat dissipation deteriorates by adding the thermal resistance of the insulator between the windings.
- An object of the present invention is to provide an electromagnetic induction device that is low in cost, small in size, can efficiently dissipate heat from a coil body, and can reduce thermal resistance.
- the purpose is that.
- the electromagnetic induction device is: A core constituting a closed magnetic circuit; A printed wiring board supporting the core and having a plurality of wiring patterns; A metal member that circulates around the core and has both ends connected to the wiring pattern, A plurality of coil portions made of the wiring pattern and the metal member are electrically connected to each other and overlapped to constitute a coil body.
- a coil body composed of a wiring pattern of a printed wiring board and a coil portion composed of a metal member having both ends connected to the wiring pattern is electrically connected to each other to form a coil body. Therefore, for example, by attaching a cooling means to the printed wiring board, the coil body can efficiently dissipate heat, and the thermal resistance can be reduced. Moreover, since a metal member is spaced apart and connected to the wiring pattern of a printed wiring board for every metal member, the heat dissipation of each metal member is also high.
- FIG. 1 It is a perspective view which shows the reactor in Embodiment 1 of this invention. It is a top view which shows the wiring pattern of the printed wiring board of FIG. It is a perspective view which shows the trans
- FIG. 1 is a perspective view showing a reactor according to Embodiment 1 of the present invention
- FIG. 2 is a top view showing a wiring pattern 8 on a metal base printed wiring board 6 of FIG.
- This reactor which is an electromagnetic induction device, is installed so as to surround a core 3 that is a PQ core that is an outer iron type and includes a first core portion 1 and a second core portion 2, and a middle leg portion of the core 3.
- Metal having a plurality of C-shaped plate-like metal members 4 formed, insulating members 5 that insulate the plate-like metal members 4 from each other and the plate-like metal members 4 and the core 3, and a plurality of wiring patterns 8 on the upper surface
- a base printed wiring board 6 This reactor is fixed to the cooler by installing and fixing the metal base printed wiring board 6 on a cooler (not shown) as a cooling means.
- the plate-like metal member 4 is a tough pitch copper material having a specified electric resistance value.
- the wiring pattern 8 of the metal-based printed wiring board 6 is a conductor having a prescribed electric resistance value, and is coated with an insulating resist except for a rectangular component land 7. Each wiring pattern 8 is electrically connected via a connection portion (not shown). Both end surfaces of each plate-like metal member 4 are in contact with each component land 7 and soldered to form a coil portion composed of the plate-like metal member 4 and the wiring pattern 8.
- Each of the coil portions is electrically connected to each other, and a coil body is configured by overlapping a predetermined number of middle leg portions of the core 3.
- the width is such that when a predetermined voltage is applied to the transformer, insulation can be secured against the voltage drop of the coil portion for one turn.
- the bottom surface of the core 3 is installed on the metal base printed wiring board 6.
- the insulating member 5 includes a half donut portion that is a half of a donut-like plate interposed between adjacent plate-like metal members 4, a cylindrical cylindrical portion that surrounds the middle leg portion of the core 3, and the plate-like metal member 4.
- the outer diameter side portion interposed between the outer diameter side and the inner wall of the core 3.
- the metal base printed wiring board 6 on which the coil body is arranged is mounted on the cooler. Therefore, the coil body can efficiently dissipate heat, and heat generated by the temperature rise of the coil body. An increase in resistance can be suppressed. Moreover, since the heat radiation area can be reduced by reducing the heat radiation area, the core 3, the plate-like metal member 4, the metal base printed wiring board 6 and the like constituting the reactor are reduced in size and weight. , And the associated cost reduction. It is possible to reduce the size and cost of the cooler that cools the reactor.
- the plate-like metal member 4 is a plate-like member, it is possible to stabilize the dimensional accuracy, so that variation in leakage inductance can be suppressed and loss variation in the coil body can be suppressed.
- the number of coil portions stacked, the plate width of the plate-like metal member 4 that is a component of the coil body, the distance between the coil body and the core 3, and the first core portion 1 and the second core portion 2 By adjusting the gap between them, the inductance can be easily adjusted.
- the respective plate-like metal members 4 are arranged apart from each other, and one plate-like metal member 4 is provided. Since heat can be radiated every time, it is possible to reduce thermal resistance and improve heat dissipation.
- Patent Document 2 unlike the reactor described in Japanese Patent Application Laid-Open No. 2009-94328 (Patent Document 2) described above, it is not necessary to store the reactor body in a metal case and fill the heat radiation resin to secure a heat radiation path. Miniaturization, weight reduction, and cost reduction are possible. Further, since the plate-like metal member 4 is connected to the component land 7 every round, it becomes possible to stabilize the dimensional accuracy between the coil portions which are the constituent elements of the coil body, and the thermal resistance, inductance, and coil body loss. Variation in isoelectric characteristics can be reduced.
- the plate-like metal member 4 by using a tough pitch copper material for the plate-like metal member 4, electrical conductivity close to that of pure copper can be obtained, and a low electrical resistance can be realized as a coil body. At the same time, since it is a non-magnetic metal, The accompanying eddy current generation and eddy current loss can be reduced. Moreover, since the loss amount is suppressed and the thermal conductivity is close to that of pure copper, the heat generated from the plate-like metal member 4 can be efficiently radiated through the metal base printed wiring board 6 and the cooler. It becomes possible. In addition, the size and weight can be reduced.
- a copper-based material is used, but the present invention can also be applied to an aluminum-based material.
- the heat dissipation and conductivity are inferior to those of the copper-based material, but since it is a non-magnetic metal, the generation of eddy currents can be suppressed.
- specific gravity is extremely small compared with a metal, especially when the number of turns of a coil body increases, it is possible to realize significant weight reduction.
- the unit price of the material is significantly lower than that of the copper-based material, the cost can be reduced.
- heat loss (iron loss) generated in the core 3 can be radiated to the cooler through the metal base printed wiring board 6.
- an insulating member 5 such as a resin plate or an insulating sheet between the plate-like metal member 4 and between the plate-like metal member 4 and the adjacent core 3, between each adjacent plate-like metal member 4, Insulation between the coil body and the core 3 is ensured, and the performance as a reactor can be stabilized.
- the insulation member 5 may not be interposed.
- the plate-like metal member 4 is used as a component of the coil body.
- a round wire or a rectangular wire may be used instead of the plate-like metal member 4.
- the metal base printed wiring board 6 which is a component of the coil body has been described, but a ceramic base printed wiring board may be used instead of the metal base printed wiring board 6.
- a ceramic base printed wiring board by using a ceramic base printed wiring board, heat dissipation can also be improved, ensuring high insulation.
- downsizing and weight reduction associated therewith can be realized.
- the core 3 has been described in the case of a PQ type core that is an outer iron type, but other outer iron type cores such as EI, EE, EER, and ER types, and an inner iron such as a U type.
- the present invention can also be applied to a formula core.
- FIG. 3 is a perspective view showing a transformer according to Embodiment 2 of the present invention
- FIG. 4 is a top view showing wiring patterns 17 and 19 on the metal base printed wiring board 15 of FIG.
- This transformer which is an electromagnetic induction device, is installed so as to surround a core 11, which is a U-shaped core, composed of a first core portion 9 and a second core portion 10, and one magnetic leg of the core 11.
- an insulating member 14 that insulates between the plate-like metal members 12 and 13 and the core 11, and a metal base printed wiring provided with a primary winding wiring pattern 17 and a secondary winding wiring pattern 19 on the upper surface.
- a plate 15 This transformer is fixed to the cooler by installing and fixing the metal base printed wiring board 15 on a cooler (not shown).
- the plate metal member 12 for primary winding is a tough pitch copper material having a specified electric resistance value.
- the wiring pattern 17 for the primary winding of the metal base printed wiring board 15 has a prescribed electric resistance value and is coated with an insulating resist except for the rectangular primary winding component land 16. Note that the primary winding wiring pattern 17 is electrically connected via a connection portion (not shown). Both end surfaces of each primary winding plate-like metal member 12 are connected to each primary winding component land 16 by being soldered to each other and connected to the primary winding plate-like metal member 12.
- a primary winding portion, which is a coil portion, composed of the primary winding wiring pattern 17 is formed. Each primary winding portion is electrically connected to each other, and a primary winding 20 that is a coil body is configured by stacking a predetermined number of one leg of the core 11.
- the plate metal member 13 for secondary winding is a tough pitch copper material having a specified electric resistance value.
- the wiring pattern 19 for the secondary winding of the metal-based printed wiring board 15 has a prescribed electric resistance value and is coated with an insulating resist except for the secondary winding component land 18 such as a rectangular shape. .
- the secondary winding wiring pattern 19 is electrically connected via a connection portion (not shown). Both end surfaces of each secondary winding plate-like metal member 13 are connected to each secondary winding component land 18 by soldering, and are connected to each other.
- a secondary winding portion, which is a coil portion, composed of the secondary winding wiring pattern 19 is formed.
- the secondary winding portions are electrically connected to each other, and the secondary winding 21 that is a coil body is configured by overlapping one leg of the core 11 by a predetermined number of turns.
- the primary winding of the primary winding wiring pattern 17 is arranged in order to alternately arrange the primary winding plate-like metal members 12 and the secondary winding plate-like metal members 13. As shown in FIG. 4, the line component land 16 and the secondary winding component land 18 of the secondary winding wiring pattern 19 are shifted by a distance of d1 along the axial direction. Further, in order to secure an insulation distance between the adjacent primary winding wiring pattern 17 and the secondary winding wiring pattern 19, as shown in FIG. .
- the metal base printed wiring board 15 on which the primary winding 20 and the secondary winding 21 are arranged is mounted on the cooler.
- Heat radiation of the wire 21 can be performed efficiently, and an increase in thermal resistance due to a temperature rise in the primary winding 20 and the secondary winding 21 can be suppressed. Further, since the heat radiation area is improved, the heat radiation area of the entire transformer can be reduced. Therefore, the core 11, the primary winding plate metal member 12, and the secondary winding plate metal constituting the transformer.
- the member 13, the metal base printed wiring board 15 and the like can be reduced in size and weight, and the cost can be reduced accordingly.
- the plate metal member 12 for the primary winding and the plate metal member 13 for the secondary winding are plate members, it is possible to stabilize the dimensional accuracy and suppress the variation of the leakage inductance, Loss variation of the primary winding 20 and the secondary winding 21 can be suppressed.
- the primary winding plate metal member 12 and the secondary winding plate metal member 13 are connected to the component lands 16 and 18 on the metal base printed wiring board 15 one by one, thereby making the primary winding. Since the plate-like metal member 12 for wires and the plate-like metal member 13 for secondary winding can be dissipated one by one, the thermal resistance can be reduced and the heat dissipation can be improved. In addition, the primary winding plate metal member 12 and the secondary winding plate metal member 13 are connected to the component lands 16 and 18 every round so that the primary winding 20 and the secondary winding 21 are connected. It is possible to stabilize the dimensional accuracy of the gap between the two, and to reduce variations in electrical characteristics such as thermal resistance and excitation, leakage inductance, and loss.
- the plate-like metal member 12 for the primary winding and the plate-like metal member 13 for the secondary winding are made of a tough pitch copper material, whereby a conductivity close to that of pure copper is obtained, and the primary winding 20 and the secondary winding. 21 can realize low electrical resistance, and at the same time, since it is a non-magnetic metal, generation of eddy currents accompanying leakage magnetic flux generated from the transformer and eddy current loss can be reduced. Moreover, since the loss amount is suppressed and the thermal conductivity is close to that of pure copper, the heat generated from the plate metal member 12 for the primary winding and the plate metal member 13 for the secondary winding is efficiently used. In particular, it is possible to dissipate heat through the metal base printed wiring board 15 and the cooler. In addition, the size and weight can be reduced.
- an insulating member 14 such as a resin plate or an insulating sheet is provided between the two plate-like metal members 12 and 13, between the two plate-like metal members 12 and 13 and the core 11 adjacent to both the plate-like metal members 12 and 13, an insulating member 14 such as a resin plate or an insulating sheet is provided.
- insulation between the primary winding 20 and the secondary winding 21, between the two plate-like metal members 12 and 13, and between the primary winding 20, the secondary winding 21 and the core 11 is achieved. It can be ensured and the performance as a transformer can be stabilized. Also, the assemblability can be improved. It is also possible to secure insulation by resin-molding the two plate-like metal members 12 and 13 which are constituent elements of the primary winding 20 and the secondary winding 21.
- the primary windings 20 and 2 are provided by providing a distance that can be insulated between the primary winding wiring pattern 17 and the secondary winding wiring pattern 19 with respect to a predetermined voltage applied to the transformer. The insulation between the secondary windings 21 is ensured, and the performance as a transformer can be stabilized.
- a copper-based material is used for both plate-like metal members 12 and 13, but it can be applied to an aluminum-based material as in the first embodiment.
- the metal-based printed wiring board 15 is used as the printed wiring board that is a constituent element of the primary winding 20 and the secondary winding 21.
- ceramic is used. It may be a base printed wiring board.
- the step-up transformer is described as having a higher number of turns of the secondary winding 21 than the primary winding 20, but a step-down transformer having a higher number of turns of the primary winding than the secondary winding.
- the present invention can also be applied to a transformer.
- the U-type core in which the core 11 is an inner iron type has been described.
- the present invention can be applied to an outer iron type core such as an EI, EE, EER, or ER type.
- FIG. 5A is a diagram schematically showing an example of the arrangement of the primary winding portion 20a and the secondary winding portion 21a of the transformer
- FIG. 5B is a primary winding portion 20a of the transformer according to Embodiment 3 of the present invention. It is the figure which showed typically arrangement
- the transformation ratio of the transformer is large, there are cases where the numbers of the primary winding portion 20a and the secondary winding portion 21a are greatly different.
- the secondary winding portion 21a is continuous.
- the three adjacent to each other occurs, which increases the leakage inductance of the transformer and increases the loss of the transformer. For this, as shown in FIG.
- up to two secondary windings 21a are arranged adjacent to each other to suppress an increase in the leakage inductance of the transformer, to further increase the degree of coupling, and to suppress loss. can do.
- Other configurations are the same as those of the transformer of the second embodiment.
- a reactor and a transformer have been described as electromagnetic induction devices.
- a choke coil may be used.
- the cooling means for cooling the electromagnetic induction device the cooler in which the refrigerant circulates has been described, but a heat sink may be used.
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Abstract
Description
このような電磁誘導機器に関しては小型化、若しくは通電時に発生する熱を効率的に放熱できる構造が非常に重要である。
閉磁路を構成するコアと、
このコアを支持し複数の配線パターンを有するプリント配線板と、
前記コアを周回し、両端部が前記配線パターンに接続された金属部材と、を備え、
前記配線パターン及び前記金属部材からなる複数のコイル部が互いに電気的に接続され重ねられてコイル体が構成されている。
また、金属部材は、金属部材毎にプリント配線板の配線パターンに離間して接続されるので、各金属部材の放熱性も高い。
図1はこの発明の実施の形態1におけるリアクトルを示す斜視図、図2は図1の金属ベースプリント配線板6上の配線パターン8を示す上面図である。なお、図1においては、金属ベースプリント配線板6上に搭載された複数の電子部品は省略されている。
電磁誘導機器であるこのリアクトルは、第1のコア部1及び第2のコア部2からなる、外鉄式であるPQコアであるコア3と、このコア3の中脚部を囲むように設置されたC形状の複数の板状金属部材4と、板状金属部材4同士及び板状金属部材4とコア3とを絶縁する絶縁部材5と、上面に複数の配線パターン8が設けられた金属ベースプリント配線板6と、を備えている。
このリアクトルは、金属ベースプリント配線板6を冷却手段である冷却器(図示せず)上に設置し、固定することで、冷却器に固定される。
金属ベースプリント配線板6の配線パターン8は、規定の電気抵抗値を有する導体であり、矩形状等の部品ランド7を除いて絶縁レジストで被膜されている。なお、各配線パターン8は、図示されていない接続部を介して電気的に接続されている。
各板状金属部材4の両端面は、それぞれ各部品ランド7に当接して半田付けされることで接続され、板状金属部材4と配線パターン8とからなるコイル部を構成している。この各コイル部は、互いに電気的に接続されてコア3の中脚部を規定数重ねることでコイル体が構成される。
絶縁部材5は、隣接した板状金属部材4間に介在したドーナツ状の板を半分にした半ドーナツ部と、コア3の中脚部を囲った円筒形状の円筒部と、板状金属部材4の外径側とコア3の内壁とに介在した外径側部とから構成されている。
また、放熱性が向上することで、リアクトル全体の放熱面積を小さくさせることができるため、リアクトルを構成する、コア3、板状金属部材4、金属ベースプリント配線板6等の小型化、軽量化、及びそれに伴う低コスト化も可能となる。
なお、リアクトルを冷却する冷却器の小型化、低コスト化も可能になる。
また、板状金属部材4が1周毎に部品ランド7に接続されることで、コイル体の構成要素であるコイル部間の寸法精度の安定化が可能となり、熱抵抗及びインダクタンス、コイル体損失等電気特性のバラツキを低減させることができる。
また、損失量を抑制させると共に、純銅に近い熱伝導率を有していることから、板状金属部材4から発生した熱を効率的に金属ベースプリント配線板6、冷却器を通して放熱させることが可能となる。また、それに伴う小型化、軽量化が実現できる。
また、材料単価が銅系材料に比べ大幅に安いため、低コスト化も可能である。
図3はこの発明の実施の形態2におけるトランスを示す斜視図、図4は図3の金属ベースプリント配線板15上の配線パターン17,19を示す上面図である。なお、図3においては、金属ベースプリント配線板15上に搭載された複数の電子部品は省略されている。
電磁誘導機器であるこのトランスは、第1のコア部9及び第2のコア部10からなる、U形状コアであるコア11と、このコア11の片方の磁脚を囲むように設置された、C形の1次巻線用板状金属部材12及び2次巻線用板状金属部材13と、1次巻線用板状金属部材12と2次巻線用板状金属部材13との間、及び板状金属部材12,13とコア11との間を絶縁する絶縁部材14と、上面に1次巻線用配線パターン17、2次巻線用配線パターン19が設けられた金属ベースプリント配線板15と、を備えている。
このトランスは、金属ベースプリント配線板15を冷却器(図示せず)上に設置し、固定することで、冷却器に固定される。
金属ベースプリント配線板15の1次巻線用配線パターン17は、規定の電気抵抗値を有しており、矩形状の1次巻線用部品ランド16を除いて絶縁レジストで被膜されている。なお、1次巻線用配線パターン17は、図示されていない接続部を介して電気的に接続されている。
各1次巻線用板状金属部材12の両端面は、それぞれ各1次巻線用部品ランド16に当接して半田付けされることで接続され、1次巻線用板状金属部材12と1次巻線用配線パターン17とからなる、コイル部である1次巻線部を構成している。
この各1次巻線部は、互いに電気的に接続されてコア11の片脚を規定数重ねることでコイル体である1次巻線20が構成される。
金属ベースプリント配線板15の2次巻線用配線パターン19は、規定の電気抵抗値を有しており、矩形状等の2次巻線用部品ランド18を除いて絶縁レジストで被膜されている。なお、2次巻線用配線パターン19は、図示されていない接続部を介して電気的に接続されている。
各2次巻線用板状金属部材13の両端面は、それぞれ各2次巻線用部品ランド18に当接して半田付けされることで接続され、2次巻線用板状金属部材13と2次巻線用配線パターン19とからなる、コイル部である2次巻線部を構成している。
この各2次巻線部は、互いに電気的に接続されてコア11の片脚を規定ターン数重ねることでコイル体である2次巻線21が構成される。
また、隣接した、1次巻線用配線パターン17と2次巻線用配線パターン19との間の絶縁距離を確保するために図4に示すように、所定の距離d2離れて設けられている。
また、放熱性が向上することで、トランス全体の放熱面積を小さくさせることができるため、トランスを構成する、コア11、1次巻線用板状金属部材12、2次巻線用板状金属部材13、金属ベースプリント配線板15等の小型化、軽量化、及びそれに伴う低コスト化も可能となる。
また、1次巻線用板状金属部材12、2次巻線用板状金属部材13が1周毎に部品ランド16、18に接続されることで1次巻線20と2次巻線21との間隔の寸法精度の安定化が可能となり、熱抵抗及び励磁、漏れインダクタンス、及び損失等電気特性のバラツキを低減させることができる。
また、損失量を抑制させると共に、純銅に近い熱伝導率を有していることから、1次巻線用板状金属部材12、2次巻線用板状金属部材13から発生した熱を効率的に金属ベースプリント配線板15、冷却器を通して放熱させることが可能となる。また、それに伴う小型化、軽量化が実現できる。
また、組立性も向上させることができる。
なお、1次巻線20、2次巻線21の構成要素である両板状金属部材12,13を樹脂モールドして絶縁性を確保することも可能である。
図5Aはトランスの1次巻線部20a、2次巻線部21aの配置を模式的に示した一例を示す図、図5Bはこの発明の実施の形態3におけるトランスの1次巻線部20a、2次巻線部21aの配置を模式的に示した図である。
トランスの変圧比が大きい場合には、1次巻線部20a及び2次巻線部21aのそれぞれの数が大きく異なる場合が生じ、例えば図5Aに示すように、2次巻線部21aが連続して3個隣接することが生じ、この結果トランスの漏れインダクタンスが増加し、トランスの損失が大きくなってしまう。
これに対しては、図5Bに示すように、2次巻線部21aは2個まで隣接して配置することで、トランスの漏れインダクタンスの増加を抑え、さらに結合度が高く、かつ損失を抑制することができる。
他の構成は、実施の形態2のトランスと同じである。
また、電磁誘導機器を冷却する冷却手段の例として、内部に冷媒が流通する冷却器について説明したが、ヒートシンクであってもよい。
Claims (21)
- 閉磁路を構成するコアと、
このコアを支持し複数の配線パターンを有するプリント配線板と、
前記コアを周回し、両端部が前記配線パターンに接続された金属部材と、を備え
前記配線パターン及び前記金属部材からなる複数のコイル部が互いに電気的に接続され重ねられてコイル体が構成されている電磁誘導機器。 - 前記金属部材は、板状金属部材である請求項1に記載の電磁誘導機器。
- 隣接した前記板状金属部材間、前記板状金属部材と前記コアとの間には、絶縁部材が介在している請求項2に記載の電磁誘導機器。
- 前記金属部材は、丸線である請求項1に記載の電磁誘導機器。
- 前記金属部材は、平角線である請求項1に記載の電磁誘導機器。
- 前記金属部材は、前記コアを一周回している請求項1~5の何れか1項に記載の電磁誘導機器。
- 前記金属部材は、前記プリント配線板と半田付けにより接続されている請求項1~6の何れか1項に記載の電磁誘導機器。
- 前記金属部材は、銅で構成されている請求項1~7の何れか1項に記載の電磁誘導機器。
- 前記金属部材は、アルミニウムで構成されている請求項1~7の何れか1項に記載の電磁誘導機器。
- 前記プリント配線板は、金属ベースプリント配線板である請求項1~9の何れか1項に記載の電磁誘導機器。
- 前記プリント配線板は、セラミックベースプリント配線板である請求項1~9の何れか1項に記載の電磁誘導機器。
- 前記コアは、前記プリント配線板に面接触している請求項1~11の何れか1項に記載の電磁誘導機器。
- 前記電磁誘導機器は、トランスであり、前記コイル体は、前記コイル部である1次巻線部から構成された1次巻線、及び前記コイル部である2次巻線部から構成された2次巻線である請求項1~12の何れか1項に記載の電磁誘導機器。
- 前記1次巻線部と、前記2次巻線部とは交互に重ねられている請求項13に記載の電磁誘導機器。
- 前記1次巻線部、前記2次巻線部は、何れも最大2個まで隣接して配置されている請求項13に記載の電磁誘導機器。
- 前記1次巻線部の構成要素である1次巻線用金属部材が接続される前記配線パターンの1次巻線用部品ランドと、この1次巻線用部品ランドと隣接した、前記2次巻線部の構成要素である2次巻線用金属部材が接続される前記配線パターンの2次巻線用部品ランドとは、絶縁距離を有して離間している請求項13~15の何れか1項に記載の電磁誘導機器。
- 前記1次巻線用金属部材と前記2次巻線用金属部材との間、前記1次巻線用金属部材、前記2次巻線用金属部材と前記コアとの間には、絶縁部材が介在している請求項16に記載の電磁誘導機器。
- 前記絶縁部材は、樹脂プレートである請求項17に記載の電磁誘導機器。
- 前記絶縁部材は、樹脂シートである請求項17に記載の電磁誘導機器。
- 前記1次巻線用金属部材及び前記2次巻線用金属部材は、樹脂モールドされている請求項17に記載の電磁誘導機器。
- 前記プリント配線には、前記電磁誘導機器を冷却する冷却手段が取付けられる請求項1~20の何れか1項に記載の電磁誘導機器。
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WO2018135357A1 (ja) * | 2017-01-17 | 2018-07-26 | 株式会社オートネットワーク技術研究所 | 多段コイルおよび回路構成体 |
TWI687945B (zh) * | 2018-05-31 | 2020-03-11 | 振華電腦有限公司 | 具有改良繞組結構的變壓器 |
CN113889324A (zh) * | 2020-07-03 | 2022-01-04 | 三菱电机株式会社 | 绝缘变压器及使用该绝缘变压器的功率转换装置 |
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