TWI625742B - Three-phase coupled inductor - Google Patents
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Abstract
一種三相耦合電感，適用於一轉換器。三相耦合電感包括一鐵芯組。鐵芯組包括一第一鐵芯及一第二鐵芯。第一鐵芯具有一第一板體及多個柱體。第一板體包括一第一中心部、多個第一側臂部及多個第一翼部。各第一側臂部連接第一中心部。各第一翼部連接於兩相鄰的該些第一側臂部之間。各柱體設置於該些第一側臂部的其中之一，並凸出於第一板體。第二鐵芯用以與第一鐵芯組合。其中，多片線路板配置於第一鐵芯與第二鐵芯之間。 A three-phase coupled inductor for a converter. The three-phase coupled inductor includes a core set. The iron core group includes a first iron core and a second iron core. The first core has a first plate body and a plurality of columns. The first plate body includes a first central portion, a plurality of first side arm portions, and a plurality of first wing portions. Each of the first side arm portions is connected to the first center portion. Each of the first wing portions is coupled between the two adjacent first side arm portions. Each of the cylinders is disposed on one of the first side arm portions and protrudes from the first plate body. The second core is used in combination with the first core. Wherein, the plurality of circuit boards are disposed between the first iron core and the second iron core.
Description
本發明有關於一種三相耦合電感，且特別是有關於用於轉換器之三相耦合電感。 The present invention relates to a three-phase coupled inductor, and more particularly to a three-phase coupled inductor for a converter.
在Shultz等人之美國專利第6,362,986號(Shultz`986專利)揭露具有多相耦合電感器拓撲之轉換器。其中，這些轉換器具有優勢，包括相較於具有傳統多相位直流到直流轉換器拓撲結構之轉換器，減少電感體積和降低鐵芯損耗。 A converter having a multi-phase coupled inductor topology is disclosed in U.S. Patent No. 6,362,986 to Shultz et al. Among them, these converters have advantages, including reducing the inductor volume and reducing the core loss compared to converters with a conventional multi-phase DC-to-DC converter topology.
此外，多相交錯式拓樸仍然具有缺點，例如只能減少總輸出電流漣波，無法減少各相的電流漣波；以及越多相的電路會增加其控制複雜度。再者，寬鬆整合型耦合電感的設計步驟：第一階段是減少交錯式升壓轉換器的磁型元件數目，將每一相的繞線組都繞在鐵芯的或是鐵芯外側臂的柱體上；第二階段將氣隙放置在鐵芯的或是鐵芯的每一臂的柱體上，這樣可以簡化製造的複雜程度。 In addition, the multiphase interleaved topology still has disadvantages, such as only reducing the total output current chopping, and not reducing the current chopping of each phase; and the more phase circuits increase the control complexity. Furthermore, the design steps of the loosely integrated coupling inductor: the first stage is to reduce the number of magnetic components of the interleaved boost converter, and to wind the winding group of each phase around the core or the outer arm of the core. On the cylinder; the second stage places the air gap on the core of the iron core or the arm of each core, which simplifies the manufacturing complexity.
然而，在電流漣波觀點下，因為互感的成分降低，寬鬆整合型耦合電感沒辦法達到很好的表現。例如氣隙將增加寬鬆整合型耦合電感的阻抗；以及於鐵芯的或側臂的柱體上圍繞繞線組，致使寬鬆整合型耦合電感的體積佔據相當大空間。藉此三相耦合電感於使用上往往會造成不便性。 However, in the current chopping view, the loosely integrated coupling inductor cannot achieve good performance because the composition of the mutual inductance is lowered. For example, the air gap will increase the impedance of the loosely integrated coupling inductor; and surround the winding group on the core of the core or side arm, resulting in a relatively large volume of loosely integrated coupling inductor. This three-phase coupled inductor tends to cause inconvenience in use.
有鑑於此，本發明揭露一種三相耦合電感，透過具有翼部的鐵芯組之設計，藉此降低三相耦合電感的體積，並提升三相耦合電感之使用上的方便性。 In view of this, the present invention discloses a three-phase coupled inductor that transmits the design of a core group having wings, thereby reducing the volume of the three-phase coupled inductor and improving the convenience of use of the three-phase coupled inductor.
本發明提供一種三相耦合電感，適用於一轉換器。三相耦合電感包括一鐵芯組。鐵芯組包括一第一鐵芯及一第二鐵芯。第一鐵芯具有一第一板體及多個柱體。第一板體包括一第一中心部、多個第一側臂部及多個第一翼部。各第一側臂部連接第一中心部。各第一翼部連接於兩相鄰的該些第一側臂部之間。各柱體設置於該些第一側臂部的其中之一，並凸出於第一板體。第二鐵芯用以與第一鐵芯組合。其中，多片線路板配置於第一鐵芯與第二鐵芯之間。 The invention provides a three-phase coupled inductor suitable for use in a converter. The three-phase coupled inductor includes a core set. The iron core group includes a first iron core and a second iron core. The first core has a first plate body and a plurality of columns. The first plate body includes a first central portion, a plurality of first side arm portions, and a plurality of first wing portions. Each of the first side arm portions is connected to the first center portion. Each of the first wing portions is coupled between the two adjacent first side arm portions. Each of the cylinders is disposed on one of the first side arm portions and protrudes from the first plate body. The second core is used in combination with the first core. Wherein, the plurality of circuit boards are disposed between the first iron core and the second iron core.
基於上述，本發明提供一種三相耦合電感，透過將習知中心柱移除，並於鐵芯上增加多個翼部之設計，致使三相耦合電感可維持一定的感量，並且鐵芯組的整體體積小於原含有習知中心柱的鐵芯的體積。藉此本發明確實可縮小三相耦合電感的體積，並可得到較小的鐵芯損耗。如此一來，本實施例確實可提升三相耦合電感的使用方便性。 Based on the above, the present invention provides a three-phase coupled inductor that removes a conventional center pillar and adds a plurality of wings to the core, so that the three-phase coupled inductor can maintain a certain amount of inductance, and the core group The overall volume is smaller than the volume of the core originally containing the conventional center column. Thereby, the invention can indeed reduce the volume of the three-phase coupled inductor and obtain a smaller core loss. In this way, the embodiment can indeed improve the usability of the three-phase coupled inductor.
為了能更進一步瞭解本發明為達成既定目的所採取的技術、方法及功效，請參閱以下有關本發明的詳細說明、圖式，相信本發明的目的、特徵與特點，當可由此得以深入且具體的瞭解，然而所附圖式與附件僅提供參考與說明用，並非用來對本發明加以限制。 In order to further understand the technology, method and function of the present invention in order to achieve the intended purpose, reference should be made to the detailed description and drawings of the invention. The drawings and the annexed drawings are to be considered as illustrative and not restrictive.
1、1a‧‧‧三相耦合電感 1, 1a‧‧‧Three-phase coupled inductor
B1、B1a‧‧‧第一線路板 B1, B1a‧‧‧ first circuit board
B2、B2a‧‧‧第二線路板 B2, B2a‧‧‧ second circuit board
B3、B3a‧‧‧第三線路板 B3, B3a‧‧‧ third circuit board
h11~h16、h21~h26、h31~h36‧‧‧穿孔結構 H11~h16, h21~h26, h31~h36‧‧‧ perforated structure
s11、s12、s21、s23、s32、s33‧‧‧法拉第遮蔽層 S11, s12, s21, s23, s32, s33‧‧‧Faraday shielding layer
L1‧‧‧第一繞線組 L1‧‧‧First Winding Group
L2‧‧‧第二繞線組 L2‧‧‧second winding group
L3‧‧‧第三繞線組 L3‧‧‧3rd winding group
L4‧‧‧第四繞線組 L4‧‧‧fourth winding group
L5‧‧‧第五繞線組 L5‧‧‧5th winding group
L6‧‧‧第六繞線組 L6‧‧‧6th winding group
10、10a‧‧‧鐵芯組 10, 10a‧‧‧ iron core group
E1、E1a‧‧‧第一鐵芯 E1, E1a‧‧‧ first core
E2、E2a‧‧‧第二鐵芯 E2, E2a‧‧‧second core
B11、B11a‧‧‧第一板體 B11, B11a‧‧‧ first board
CP1、CP1a‧‧‧第一中心部 CP1, CP1a‧‧‧ first central department
A1~A3、A1a~A6a‧‧‧第一側臂部 A1~A3, A1a~A6a‧‧‧ first side arm
F1~F3、F1a~F6a‧‧‧第一翼部 F1~F3, F1a~F6a‧‧‧ first wing
BL1、BL1a、BL2、BL2a‧‧‧底邊 BL1, BL1a, BL2, BL2a‧‧‧ bottom edge
SL1、SL1a、SL2、SL2a‧‧‧側邊 SL1, SL1a, SL2, SL2a‧‧‧ side
B12、B12a‧‧‧第二板體 B12, B12a‧‧‧ second plate
CP2、CP2a‧‧‧第二中心部 CP2, CP2a‧‧‧ Second Central Department
A4~A6、A7a~A12a‧‧‧第二側臂部 A4~A6, A7a~A12a‧‧‧ second side arm
F4~F6、F7a~F12a‧‧‧第二翼部 F4~F6, F7a~F12a‧‧‧ second wing
α、β‧‧‧夾角 α, β‧‧‧ angle
P1‧‧‧第一柱 P1‧‧‧ first column
P2‧‧‧第二柱 P2‧‧‧Second column
P3‧‧‧第三柱 P3‧‧‧third column
P4‧‧‧第四柱 P4‧‧‧fourth column
P5‧‧‧第五柱 P5‧‧‧ fifth column
P6‧‧‧第六柱 P6‧‧‧ sixth column
Vin‧‧‧輸入電壓 Vin‧‧‧Input voltage
D1~D3‧‧‧二極體 D1~D3‧‧‧ diode
Q1~Q3‧‧‧開關 Q1~Q3‧‧‧ switch
Co‧‧‧電容 Co‧‧‧ capacitor
Rload‧‧‧負載 Rload‧‧‧ load
圖1A為本發明一實施例之三相耦合電感之第一鐵芯示意圖。 1A is a schematic view of a first core of a three-phase coupled inductor according to an embodiment of the invention.
圖1B為本發明一實施例之三相耦合電感之第二鐵芯示意圖。 FIG. 1B is a schematic diagram of a second core of a three-phase coupled inductor according to an embodiment of the invention.
圖2為本發明一實施例之三相耦合電感之分解示意圖。 2 is an exploded perspective view of a three-phase coupled inductor according to an embodiment of the present invention.
圖2A為根據圖2之本發明另一實施例之三相耦合電感之組合示意圖。 2A is a schematic diagram showing the combination of three-phase coupled inductors according to another embodiment of the present invention.
圖2B為根據圖1之本發明另一實施例之三相耦合電感之組合示意圖。 2B is a schematic diagram of a combination of three-phase coupled inductors according to another embodiment of the present invention.
圖3A為根據圖1之本發明另一實施例之三相耦合電感之第一 線路板細部示意圖。 3A is a first phase of a three-phase coupled inductor according to another embodiment of the present invention. Schematic diagram of the circuit board.
圖3B為根據圖1之本發明另一實施例之三相耦合電感之第二線路板細部示意圖。 3B is a schematic view showing a second circuit board of a three-phase coupled inductor according to another embodiment of the present invention.
圖3C為根據圖1之本發明另一實施例之三相耦合電感之第三線路板細部示意圖。 3C is a schematic view showing a third circuit board of a three-phase coupled inductor according to another embodiment of the present invention.
圖4為本發明另一實施例之三相耦合電感之細部電路圖。 4 is a detailed circuit diagram of a three-phase coupled inductor according to another embodiment of the present invention.
圖5A為本發明另一實施例之三相耦合電感之第一鐵芯示意圖。 FIG. 5A is a schematic diagram of a first iron core of a three-phase coupled inductor according to another embodiment of the present invention.
圖5B為本發明另一實施例之三相耦合電感之第二鐵芯示意圖。 FIG. 5B is a schematic diagram of a second core of a three-phase coupled inductor according to another embodiment of the present invention.
圖6為本發明另一實施例之三相耦合電感之分解示意圖。 FIG. 6 is an exploded perspective view of a three-phase coupled inductor according to another embodiment of the present invention.
圖7A為根據圖6之本發明另一實施例之三相耦合電感之組合示意圖。 FIG. 7A is a schematic diagram of a combination of three-phase coupled inductors according to another embodiment of the present invention. FIG.
圖7B為根據圖6之本發明另一實施例之三相耦合電感之組合示意圖。 FIG. 7B is a schematic diagram of a combination of three-phase coupled inductors according to another embodiment of the present invention. FIG.
在下文中，將藉由圖式說明本發明的各種例示實施例來詳細描述本發明。然而，本發明概念可能以許多不同形式來體現，且不應解釋為限於本文中所闡述的例示性實施例。此外，圖式中相同參考數字可用以表示類似的元件。 In the following, the invention will be described in detail by way of illustration of various exemplary embodiments of the invention. However, the inventive concept may be embodied in many different forms and should not be construed as being limited to the illustrative embodiments set forth herein. In addition, the same reference numerals may be used in the drawings to indicate similar elements.
圖1A為本發明一實施例之三相耦合電感之第一鐵芯示意圖。圖1B為本發明一實施例之三相耦合電感之第二鐵芯示意圖。請參照圖1A及圖1B。一鐵芯組10，包括一如圖1A之第一鐵芯E1及一如圖1B之第二鐵芯E2。在實務上，第一鐵芯E1具有一第一板體B11及多個柱體P1~P3。 1A is a schematic view of a first core of a three-phase coupled inductor according to an embodiment of the invention. FIG. 1B is a schematic diagram of a second core of a three-phase coupled inductor according to an embodiment of the invention. Please refer to FIG. 1A and FIG. 1B. A core group 10 includes a first core E1 as shown in FIG. 1A and a second core E2 as shown in FIG. 1B. In practice, the first core E1 has a first plate body B11 and a plurality of columns P1 to P3.
第一板體B11包括一第一中心部CP1、多個第一側臂部A1~A3及多個第一翼部F1~F3。各第一側臂部A1~A3連接第一中心部CP1。各第一翼部F1~F3連接於兩相鄰的該些第一側臂部 A1~A3之間。各柱體P1~P3設置於該些第一側臂部A1~A3的其中之一，並凸出於第一板體B11。 The first plate body B11 includes a first center portion CP1, a plurality of first side arm portions A1 to A3, and a plurality of first wing portions F1 to F3. Each of the first side arm portions A1 to A3 is connected to the first center portion CP1. Each of the first wing portions F1 F F3 is connected to the two adjacent first side arm portions Between A1 and A3. Each of the pillars P1 to P3 is disposed on one of the first side arm portions A1 to A3 and protrudes from the first plate body B11.
接下來，第二鐵芯E2用以與第一鐵芯E1組合。在實務上，第二鐵芯E2具有一第二板體B12。第二板體B12包括一第二中心部CP2、多個第二側臂部A4~A6及多個第二翼部F4~F6。各第二側臂部A4~A6連接第二中心部CP2。各第二翼部F4~F6連接於兩相鄰的該些第二側臂部A4~A6之間。 Next, the second core E2 is used in combination with the first core E1. In practice, the second core E2 has a second plate B12. The second plate body B12 includes a second center portion CP2, a plurality of second side arm portions A4 to A6, and a plurality of second wing portions F4 to F6. Each of the second side arm portions A4 to A6 is connected to the second center portion CP2. Each of the second wing portions F4 to F6 is connected between the two adjacent second side arm portions A4 to A6.
其中，第二板體B12與第一板體B11為相對應的形狀板。第一中心部CP1為三角形板。該些第一側臂部A1~A3的數量為三個，該些第一翼部F1~F3的數量為三個。且第二中心部CP2為相對應的三角形板。該些第二側臂部A4~A6的數量為三個，該些第二翼部F4~F6的數量為三個。其中，第一中心部CP1、該些第一側臂部A1~A3及該些第一翼部F1~F3形成一體成形的板體。而第二中心部CP2、該些第二側臂部A4~A6及該些第二翼部F4~F6形成一體成形的板體。 The second plate body B12 and the first plate body B11 are corresponding shape plates. The first center portion CP1 is a triangular plate. The number of the first side arm portions A1 to A3 is three, and the number of the first wing portions F1 to F3 is three. And the second central portion CP2 is a corresponding triangular plate. The number of the second side arm portions A4 to A6 is three, and the number of the second wing portions F4 to F6 is three. The first central portion CP1, the first side arm portions A1 to A3, and the first wing portions F1 to F3 form an integrally formed plate body. The second central portion CP2, the second side arm portions A4 to A6, and the second wing portions F4 to F6 form an integrally formed plate body.
在其他實施中，第一及第二中心部CP1、CP2例如分別為六角形板、九角形板、十二角形板、十五角形板、十八角形板、二十一角形板、二十四角形板、二十七角形板或其他任意角形板。當然，該些側臂部的數量係相對應於中心部的形狀。例如，第一中心部CP1為十八角形板。則第一側臂部A1~A3的數量為十八個。第一翼部F1~F3的數量亦為十八個。本實施例不限制第一板體B11及第二板體B12的態樣。 In other implementations, the first and second central portions CP1, CP2 are, for example, hexagonal plates, octagonal plates, dodecagonal plates, pentagon plates, octagonal plates, twenty-one horn plates, and twenty-four corners. Shaped plate, twenty-seven angle plate or any other angular plate. Of course, the number of the side arm portions corresponds to the shape of the center portion. For example, the first central portion CP1 is an octagonal plate. Then, the number of the first side arm portions A1 to A3 is eighteen. The number of the first wing portions F1 to F3 is also eighteen. This embodiment does not limit the aspects of the first plate body B11 and the second plate body B12.
進一步來說，習知的鐵芯例如為Y字型板體，並設置有四支柱體。其中，中心柱設置於如Y字型板體的中心點。中心柱與各側臂上的柱體等距，藉此形成對稱的Y字型態樣的三相鐵芯架構。然而，本實施例係將習知如Y字型鐵芯的中心柱移除。也就是說，第一鐵芯E1及第二鐵芯E2分別不具有習知鐵芯的中心柱。因此，相較於習知鐵芯的體積，本實施例將大幅降低鐵芯組 10所佔據的空間。 Further, the conventional iron core is, for example, a Y-shaped plate body and is provided with a four-pillar body. Wherein, the central column is disposed at a center point such as a Y-shaped plate body. The center post is equidistant from the cylinders on each side arm, thereby forming a symmetrical Y-shaped three-phase core structure. However, this embodiment removes the center column of a conventional Y-shaped core. That is to say, the first core E1 and the second core E2 do not have the center pillar of the conventional iron core, respectively. Therefore, this embodiment will greatly reduce the core group compared to the volume of the conventional iron core. 10 occupied space.
詳細來說，習知Y字型鐵芯的中心柱係為高導磁率的軟鐵氧體或硬鐵氧體。當習知中心柱被移除後，習知鐵芯的等效磁阻會劇烈上升。其中，因習知中心柱係上下連接的習知鐵芯的板體。所以，習知中心柱被移除後，即表示習知中心柱被低導磁率的空氣取而代之。因此磁通量會大量流入其他繞線組的磁路中，致使得耦合係數會達到0.984，幾乎達到完全耦合。其中，越高的耦合係數即表示，當三相耦合電感的工作週期大於66%時，三相耦合電感之感量會有大量抵消的情況。 In detail, the central column of the conventional Y-shaped iron core is a soft magnetic ferrite or a hard ferrite having a high magnetic permeability. When the conventional center column is removed, the equivalent magnetic resistance of the conventional iron core will rise sharply. Among them, the conventional iron core plate is connected to the center column by the conventional center column. Therefore, after the conventional center column is removed, it means that the conventional center column is replaced by a low permeability air. Therefore, the magnetic flux will flow into the magnetic circuit of other winding groups in a large amount, so that the coupling coefficient will reach 0.984, which is almost complete coupling. Among them, the higher the coupling coefficient means that when the working period of the three-phase coupled inductor is greater than 66%, the inductance of the three-phase coupled inductor will be largely offset.
為了改善上述的情況，本實施例提出增加額外的磁路體積，用以增加漏感成分。例如，增加如圖1A的第一翼部F1~F3以及如圖1B的第二翼部F4~F6，以增加漏感成分。當磁力線大量抵消時，本實施例仍可維持一定的感量，並且鐵芯組10的整體體積小於原含有習知中心柱的鐵芯的體積。所以，本實施例之鐵芯組10可得到較小的鐵芯損耗。 In order to improve the above situation, the present embodiment proposes to add an additional magnetic circuit volume for increasing the leakage inductance component. For example, the first wing portions F1 to F3 of FIG. 1A and the second wing portions F4 to F6 of FIG. 1B are added to increase the leakage inductance component. When the magnetic lines of force are largely offset, the embodiment can maintain a certain amount of sensitivity, and the overall volume of the core group 10 is smaller than the volume of the core originally containing the conventional center column. Therefore, the core group 10 of the present embodiment can obtain a small core loss.
例如，被移除的習知中心柱體積約為415.7mm3。而本實施例之該些第一及第二翼部F1~F6所額外增加的體積約為320mm3。也就是說，本實施例之鐵芯組10的整體體積減少了95.7mm3，並且提高了額外的漏感量。例如，在功率開關工作週期大於66%的情況下，降低耦合係數可減少整體抵消的等效感量。 For example, the conventional center column that was removed has a volume of approximately 415.7 mm3. The additional volume of the first and second wings F1 - F6 of the embodiment is about 320 mm 3 . That is, the overall volume of the core group 10 of the present embodiment is reduced by 95.7 mm 3 and an additional amount of leakage inductance is increased. For example, in the case where the power switch duty cycle is greater than 66%, lowering the coupling coefficient reduces the equivalent sensitivity of the overall cancellation.
再進一步來說，第一側臂部A1~A3例如為由中心部往外延伸的臂板。也就是說，第一中心部CP1為正三角形，且一第一側臂部A1~A3以十二點鐘方向延伸，另一第一側臂部A1~A3以四點鐘方向延伸，另一第一側臂部A1~A3以八點鐘方向延伸。而第一翼部F1~F3例如為等腰三角形板、弧形板或扇形板或其他形狀板。也就是，兩兩側臂部之間相隔120度。 Still further, the first side arm portions A1 to A3 are, for example, arm plates that extend outward from the center portion. That is, the first central portion CP1 is an equilateral triangle, and one first side arm portion A1~A3 extends in a twelve o'clock direction, and the other first side arm portion A1~A3 extends in a four o'clock direction, and the other The first arm portions A1 to A3 extend in the eight o'clock direction. The first wing portions F1 to F3 are, for example, isosceles triangular plates, curved plates or sector plates or other shape plates. That is, the arms on both sides are separated by 120 degrees.
其中，根據磁模擬軟體Magnet可得知，磁力線對於90度的轉 角並不會均勻的分佈在磁路上，該現象指出磁路轉角有90度或是大角度的轉折時，磁路無法完整發揮應有的功能。因此，本實施例之各第一翼部F1~F3的一第一底邊BL1與相鄰的第一側臂部A1~A3的一第一側邊SL1的內夾角α小於九十度。而各第二翼部F4~F6的一第二底邊BL2與相鄰的第二側臂部A4~A6的一第二側邊SL2的內夾角β小於九十度。簡單來說，本實施例將避免掉大轉折角度，致使磁力線均勻分布在各第一翼部F1~F3(或各第二翼部F4~F6)的磁路上。 Among them, according to the magnetic simulation software Magnet, the magnetic line is rotated for 90 degrees. The angles are not evenly distributed on the magnetic circuit. This phenomenon indicates that when the magnetic circuit corner has a 90 degree or a large angle transition, the magnetic circuit cannot fully perform its intended function. Therefore, the inner angle α of a first bottom side BL1 of each of the first wing portions F1 to F3 of the present embodiment and a first side edge SL1 of the adjacent first side arm portions A1 to A3 is less than ninety degrees. The inner angle β of a second bottom edge BL2 of each of the second wing portions F4 to F6 and a second side edge SL2 of the adjacent second side arm portions A4 to A6 is less than ninety degrees. In brief, in this embodiment, the large turning angle is avoided, so that the magnetic lines of force are evenly distributed on the magnetic paths of the first wing portions F1 to F3 (or the second wing portions F4 to F6).
值得一提的是，該些第一翼部F1~F3及該些第二翼部F4~F6的體積小於一虛擬柱體積。在實務上，虛擬柱體積例如為習知鐵芯的中心柱的體積。換句話說，虛擬柱體積係為由第一中心部CP1與第二中心部CP2之間所構成的體積。也就是本實施例之第一板體B11的第一中心部CP1投射至第二板體B12的第二中心部CP2之間所構成的體積。 It is worth mentioning that the volumes of the first wing portions F1 F F3 and the second wing portions F4 F F6 are smaller than a virtual column volume. In practice, the virtual column volume is, for example, the volume of a central column of a conventional iron core. In other words, the virtual column volume is a volume formed between the first central portion CP1 and the second central portion CP2. That is, the volume formed by the first central portion CP1 of the first plate body B11 of the present embodiment projected between the second central portions CP2 of the second plate body B12.
由此可知，本實施例係將習知中心柱移除。而習知中心柱移除後，當工作週期操作大於66%時，磁通會產生二次抵消，使得三相耦合電感感量大幅下降，以致失去限制電流的能力。因此，本實施例為了優化鐵芯損耗，本實施例提出新增漏感磁路的體積，如該些第一翼部F1~F3及該些第二翼部F4~F6，且體積小於被移除的習知中心柱的體積。藉此本實施例之三相耦合電感可保有一定的感量，並獲得較低的鐵芯損耗。 It can be seen from this that the present embodiment removes the conventional center column. After the conventional center column is removed, when the duty cycle operation is greater than 66%, the magnetic flux will generate a secondary cancellation, so that the inductance of the three-phase coupling inductance is greatly reduced, so that the ability to limit the current is lost. Therefore, in this embodiment, in order to optimize the core loss, the present embodiment proposes to increase the volume of the leakage magnetic circuit, such as the first wing portions F1 to F3 and the second wing portions F4 to F6, and the volume is smaller than the moved. In addition to the volume of the conventional center column. Thereby, the three-phase coupled inductor of the embodiment can maintain a certain amount of inductance and obtain a low core loss.
圖2為本發明一實施例之三相耦合電感之分解示意圖。圖2及圖2A分為根據圖1之本發明另一實施例之三相耦合電感之組合示意圖。請參照圖1、圖2及圖2A。 2 is an exploded perspective view of a three-phase coupled inductor according to an embodiment of the present invention. 2 and 2A are schematic diagrams showing a combination of three-phase coupled inductors according to another embodiment of the present invention. Please refer to FIG. 1 , FIG. 2 and FIG. 2A .
一種三相耦合電感1，適用於一轉換器。轉換器例如為升壓轉換電路、降壓轉換電路或升降壓轉換電路，本實施例不限制轉換器的態樣。其中，三相耦合電感1例如為運用於電力轉換系統中的交錯升壓型轉換器。三相耦合電感1包括一第一線路板B1、 一第二線路板B2、一第三線路板B3及一鐵芯組10。 A three-phase coupled inductor 1 for a converter. The converter is, for example, a boost converter circuit, a buck converter circuit, or a buck-boost converter circuit, and the embodiment does not limit the aspect of the converter. Among them, the three-phase coupled inductor 1 is, for example, an interleaved boost converter used in a power conversion system. The three-phase coupled inductor 1 includes a first circuit board B1 A second circuit board B2, a third circuit board B3 and a core group 10.
在實務上，第一線路板B1具有兩組繞線組L1、L2，如圖3A。第二線路板B2具有兩組繞線組L3、L4，如圖3B。第三線路板B3具有兩組繞線組L5、L6，如圖3C。舉例來說，請參照圖3A、圖3B及圖3C。第一線路板B1具有一第一繞線組L1及一第二繞線組L2。第二線路板B2具有一第三繞線組L3及一第四繞線組L4。第三線路板B3具有一第五繞線組L5及一第六繞線組L6。其中，第一繞線組L1、第四繞線組L4及第六繞線組L6分別為逆時針繞線線圈。而第二繞線組L2、第三繞線組L3及第五繞線組L5分別為順時針繞線線圈。 In practice, the first circuit board B1 has two sets of winding groups L1, L2, as shown in FIG. 3A. The second circuit board B2 has two sets of winding groups L3, L4, as shown in FIG. 3B. The third circuit board B3 has two sets of winding groups L5, L6, as shown in FIG. 3C. For example, please refer to FIG. 3A, FIG. 3B and FIG. 3C. The first circuit board B1 has a first winding group L1 and a second winding group L2. The second circuit board B2 has a third winding group L3 and a fourth winding group L4. The third circuit board B3 has a fifth winding group L5 and a sixth winding group L6. The first winding group L1, the fourth winding group L4, and the sixth winding group L6 are respectively counterclockwise winding coils. The second winding group L2, the third winding group L3, and the fifth winding group L5 are respectively clockwise winding coils.
詳細來說，六組繞線組L1~L6係採用平板電感走線方式，以分別設置於電路板上。例如，第一及第二繞線組L1、L2設置於第一線路板B1上。其中，每一線路板B1~B3例如為多層電路板。為了方便說明，本實施例之各線路板B1~B3係以四層板來說明。 In detail, the six sets of winding groups L1~L6 adopt flat panel inductive routing to be respectively disposed on the circuit board. For example, the first and second winding groups L1, L2 are disposed on the first wiring board B1. Each of the circuit boards B1 B B3 is, for example, a multi-layer circuit board. For convenience of description, each of the circuit boards B1 to B3 of the present embodiment is described by a four-layer board.
此外，如圖1之各線路板B1~B3的底層及表面層分別為法拉第遮蔽層s11、s12、s21、s23、s32、s33，以減低在高頻下平板電感走線之間的層間電容效應。而各線路板B1~B3的第二層及第三層分別設置有順時針繞線線圈或逆時針繞線線圈。簡單來說，法拉第遮蔽層s11、s12、s21、s23、s32、s33例如為電磁屏蔽層、電磁隔離層或電磁絕緣層。其中，法拉第遮蔽是要避免線路板與線路板之間的層間電容。而法拉第遮蔽層s11、s12、s21、s23、s32、s33係覆蓋於如圖3A、圖3B及圖3C中具有繞線組L1~L6的區域。所以，兩兩線路板B1~B3之間不會產生電磁干擾。 In addition, the bottom layer and the surface layer of each of the circuit boards B1 to B3 of FIG. 1 are Faraday shielding layers s11, s12, s21, s23, s32, and s33, respectively, to reduce the interlayer capacitance effect between the planar inductor traces at high frequencies. . The second layer and the third layer of each of the circuit boards B1 to B3 are respectively provided with a clockwise winding coil or a counterclockwise winding coil. Briefly, the Faraday shielding layers s11, s12, s21, s23, s32, s33 are, for example, electromagnetic shielding layers, electromagnetic isolation layers or electromagnetic insulating layers. Among them, Faraday shielding is to avoid the interlayer capacitance between the circuit board and the circuit board. The Faraday shielding layers s11, s12, s21, s23, s32, and s33 cover the regions having the winding groups L1 to L6 as shown in FIGS. 3A, 3B, and 3C. Therefore, electromagnetic interference does not occur between the two circuit boards B1 to B3.
換句話說，於圖3A中鄰近穿孔結構h13的區域係未覆蓋法拉第遮蔽層。而於圖3A中第一及第二繞線組L1、L2的區域係覆蓋法拉第遮蔽層s11、s12。同理可知，於圖3B中鄰近穿孔結構h22的區域係未覆蓋法拉第遮蔽層。於圖3C中鄰近穿孔結構h31的區域係未覆蓋法拉第遮蔽層。 In other words, the region adjacent to the perforated structure h13 in FIG. 3A does not cover the Faraday shielding layer. The area of the first and second winding groups L1, L2 in FIG. 3A covers the Faraday shielding layers s11, s12. Similarly, the area adjacent to the perforated structure h22 in FIG. 3B does not cover the Faraday shielding layer. The region adjacent to the perforated structure h31 in Fig. 3C does not cover the Faraday shielding layer.
此外，為了方便說明，本實施例之線路板B1~B3係為三角形板。在其他實施例中，各線路板B1~B3可為多角形板、圓形板或其他任意形板。所屬技術領域具有通常知識者可根據本實施例之技術精神，以自由設計線路板B1~B3的態樣。 In addition, for convenience of explanation, the circuit boards B1 to B3 of the present embodiment are triangular plates. In other embodiments, each of the circuit boards B1 B B3 may be a polygonal plate, a circular plate or any other shaped plate. Those skilled in the art can freely design the layout of the boards B1 to B3 according to the technical spirit of the embodiment.
第一線路板B1具有三個穿孔結構h11~h16，第二線路板B2具有三個穿孔結構h21~h26，且第三線路板B3具有三個穿孔結構h31~h36。 The first circuit board B1 has three perforated structures h11 to h16, the second circuit board B2 has three perforated structures h21 to h26, and the third circuit board B3 has three perforated structures h31 to h36.
在實務上，第一線路板B1對應接觸第二線路板B2，第二線路板B2對應接觸第三線路板B3。且第一線路板B1、第二線路板B2及第三線路板B3配置於第一鐵芯E1與第二鐵芯E2之間。其中，對應接觸例如透過堆疊、排列緊靠或鄰近連接等方式來實現。例如，第一線路板B1堆疊至第二線路板B2上；或是第一、第二及第三線路板B1~B3等側向排列緊靠，以形成如三明治的態樣。 In practice, the first circuit board B1 corresponds to the second circuit board B2, and the second circuit board B2 corresponds to the third circuit board B3. The first circuit board B1, the second circuit board B2, and the third circuit board B3 are disposed between the first core E1 and the second core E2. Wherein, the corresponding contacts are realized, for example, by stacking, arranging close to or adjacent to each other. For example, the first circuit board B1 is stacked on the second circuit board B2; or the first, second, and third circuit boards B1 to B3 are laterally aligned to form a sandwich.
接下來，鐵芯組10包括一第一鐵芯E1及一第二鐵芯E2。在實務上，鐵芯組10具有對稱的鐵芯形狀，因此在每一相都獲得相同感量。鐵芯組10例如為高頻錳鋅功率鐵氧體TP5E材料、鎳鋅鐵氧體、鍶鐵氧體、鋇鐵氧體或鈷鐵氧體。本實施例不限制鐵芯組10的態樣。 Next, the core group 10 includes a first core E1 and a second core E2. In practice, the core group 10 has a symmetrical core shape, so that the same sensitivity is obtained in each phase. The core group 10 is, for example, a high-frequency manganese-zinc power ferrite TP5E material, nickel-zinc ferrite, barium ferrite, barium ferrite or cobalt ferrite. This embodiment does not limit the aspect of the core group 10.
第一鐵芯E1具有三支柱體P1~P3。該些柱體P1~P3分別為一第一柱P1、一第二柱P2及一第三柱P3。在實務上，第一繞線組L1圍繞第一柱P1。第二繞線組L2圍繞第二柱P2。第三繞線組L3圍繞第一柱P1。第四繞線組L4圍繞第三柱P3。第五繞線組L5圍繞第三柱P3。第六繞線組L6圍繞第二柱P2。 The first core E1 has three pillars P1 to P3. The pillars P1 to P3 are a first pillar P1, a second pillar P2 and a third pillar P3, respectively. In practice, the first winding group L1 surrounds the first column P1. The second winding group L2 surrounds the second column P2. The third winding group L3 surrounds the first column P1. The fourth winding group L4 surrounds the third column P3. The fifth winding group L5 surrounds the third column P3. The sixth winding group L6 surrounds the second column P2.
此外，第一鐵芯E1與第二鐵芯E2結合後，第一柱P1、第二柱P2及第三柱P3均連接到第二鐵芯E2，以形成不具氣隙的鐵芯結構。在其他實施例中，第一鐵芯E1與第二鐵芯E2可分別具有對應相互連接的三支柱體，以形成鐵芯組10。本實施例不限制第 一鐵芯E1與第二鐵芯E2的態樣。 In addition, after the first core E1 is combined with the second core E2, the first column P1, the second column P2, and the third column P3 are both connected to the second core E2 to form a core structure without an air gap. In other embodiments, the first core E1 and the second core E2 may respectively have three pillars connected to each other to form the core group 10. This embodiment does not limit the first The aspect of one iron core E1 and the second iron core E2.
在實務上，第一線路板B1的該些穿孔結構h11~h16與第二線路板B2的該些穿孔結構h21~h26相互對應。第二線路板B2的該些穿孔結構h21~h26與第三線路板B3的該些穿孔結構h31~h36相互對應，致使第一鐵芯E1的該些柱體P1~P3對應穿設第一線路板B1、第二線路板B2及第三線路板B3，並連接至第二鐵芯E2。 In practice, the perforated structures h11 to h16 of the first circuit board B1 and the perforated structures h21 to h26 of the second circuit board B2 correspond to each other. The perforated structures h21 to h26 of the second circuit board B2 and the perforated structures h31 to h36 of the third circuit board B3 correspond to each other, so that the pillars P1 to P3 of the first core E1 are corresponding to the first line. The board B1, the second board B2, and the third board B3 are connected to the second core E2.
其中，於本實施例中，第一柱P1係對應穿設每一線路板B1~B3的穿孔結構h11、h21、h31。第二柱P2係對應穿設每一線路板B1~B3的穿孔結構h12、h22、h32。第三柱P3係對應穿設每一線路板B1~B3的穿孔結構h13、h23、h33。此外，繞線組L1~L6分別圍繞在三個外側臂上的柱體P1~P3，且每一繞線組L1~L6的各自繞的圈數都相等。且繞線組L1~L6設置於線路板B1~B3上的有效磁通量截面積都相等。 In the embodiment, the first pillars P1 are corresponding to the perforated structures h11, h21, and h31 of each of the circuit boards B1 to B3. The second column P2 corresponds to the perforated structures h12, h22, h32 through which each of the circuit boards B1 to B3 is disposed. The third column P3 corresponds to the perforated structures h13, h23, h33 through which each of the circuit boards B1 to B3 is disposed. Further, the winding groups L1 to L6 surround the cylinders P1 to P3 on the three outer arms, respectively, and the number of turns of each of the winding groups L1 to L6 is equal. Moreover, the effective magnetic flux cross-sectional areas of the winding groups L1 to L6 disposed on the circuit boards B1 to B3 are equal.
由此可知，本實施例透過將繞線組L1~L6扁平化，並設置於電路板上。再將第一鐵芯E1對應穿設第一、第二及第三線路板B1~B3的該些穿孔結構h11~h16、h21~h26、h31~h36，並連接至第二鐵芯E2。藉此本實施例確實可縮小三相耦合電感1的體積，並降低鐵損。其中，相較於習知的多相耦合電感的體積，習知耦合電感與本實施例之三相耦合電感1的體積差，約為10倍左右。 Therefore, in the present embodiment, the winding groups L1 to L6 are flattened and provided on the circuit board. The first core E1 is correspondingly disposed through the through-hole structures h11~h16, h21~h26, h31~h36 of the first, second and third circuit boards B1~B3, and is connected to the second core E2. Thereby, the present embodiment can surely reduce the volume of the three-phase coupled inductor 1 and reduce the iron loss. The volume difference between the conventional coupled inductor and the three-phase coupled inductor 1 of the present embodiment is about 10 times larger than that of the conventional multi-phase coupled inductor.
此外，本實施例之三相耦合電感1係為高頻高耦合係數整合型三相交錯式耦合電感，具有對稱的鐵芯形狀，並利用整合的方式大幅減少電感體積，並且利用磁通耦合降低電感鐵芯損耗。 In addition, the three-phase coupled inductor 1 of the present embodiment is a high-frequency, high-coupling-coefficient integrated three-phase interleaved coupled inductor having a symmetrical core shape and utilizing an integrated manner to greatly reduce the inductor volume and reduce the flux coupling. Inductor core loss.
本實施例提出全新整合型交錯式三相耦合電感1的目的為：在減少鐵芯架構總體積的情況下，除了獲得較低的鐵芯損耗以外。本實施例透過該些第一翼部F1~F3及該些第二翼部F4~F6，以增加額外的磁路體積，藉此防止「在工作週期大於66%時，導致鐵芯的整體感量二次抵消」。其中，鐵芯的整體感量二次抵消這會使三相耦合電感1失去控制電流的能力。 This embodiment proposes a new integrated interleaved three-phase coupled inductor 1 for the purpose of reducing the total core volume, in addition to achieving a lower core loss. In this embodiment, the first wing portions F1 to F3 and the second wing portions F4 to F6 are used to increase the extra magnetic circuit volume, thereby preventing the overall feeling of the iron core when the working period is greater than 66%. The amount is offset twice." Among them, the overall inductance of the iron core twice cancels the ability of the three-phase coupled inductor 1 to lose control current.
相較於一般習知非整合式電感來說，習知非整合式電感無法同時滿足低感量以及降低鐵芯損耗。如果要獲得低感量，習知非整合式電感只能加厚氣隙和降低繞線組圈數，但是伴隨而來的是鐵芯損耗以及邊緣磁通效應。因此，本實施例所提出的整合型交錯式三相耦合電感1，利用整合的方式減少交錯式三相升壓型轉換器的電感個數，並且在鐵芯架構上，每一相的繞線組L1~L6上都有著對稱的磁路，使得磁通不會有不均流的現象發生。 Compared with the conventional non-integrated inductors, conventional non-integrated inductors cannot simultaneously satisfy low inductance and reduce core loss. If a low inductance is to be obtained, conventional non-integrated inductors can only thicken the air gap and reduce the number of winding turns, but are accompanied by core loss and edge flux effects. Therefore, the integrated interleaved three-phase coupled inductor 1 proposed in this embodiment reduces the number of inductances of the interleaved three-phase boost converter by means of integration, and the winding of each phase on the core structure Groups L1~L6 all have symmetrical magnetic circuits, so that the magnetic flux does not have uneven flow.
圖4為本發明另一實施例之三相耦合電感之細部電路圖。請參照圖4。圖4中的第一繞線組L1及第二繞線組L2設置於第一線路板B1。第三繞線組L3及第四繞線組L4設置於第二線路板B2。第五繞線組L5及第六繞線組L6設置於第三線路板B3。其中，第一繞線組L1與第三繞線組L3產生反向耦合磁通，並圍繞同一柱P1。第二繞線組L2與第六繞線組L6產生反向耦合磁通，並圍繞同一柱P2。第四繞線組L4與第五繞線組L5產生反向耦合磁通，並圍繞同一柱P3。 4 is a detailed circuit diagram of a three-phase coupled inductor according to another embodiment of the present invention. Please refer to Figure 4. The first winding group L1 and the second winding group L2 in FIG. 4 are disposed on the first wiring board B1. The third winding group L3 and the fourth winding group L4 are disposed on the second wiring board B2. The fifth winding group L5 and the sixth winding group L6 are disposed on the third wiring board B3. The first winding group L1 and the third winding group L3 generate a reverse coupled magnetic flux and surround the same column P1. The second winding group L2 and the sixth winding group L6 generate a reverse coupling magnetic flux and surround the same column P2. The fourth winding group L4 and the fifth winding group L5 generate a reverse coupling magnetic flux and surround the same column P3.
在實務上，第一繞線組L1的打點端與第三繞線組L3的打點端之打點方向為反向。第二繞線組L2的打點端與第六繞線組L6的打點端之打點方向為反向。第四繞線組L4的打點端與第五繞線組L5的打點端之打點方向為反向。藉此兩兩繞線組L1、L3、L2、L6、L4、L5之間產生反向耦合磁通，以得到在高頻應用下之較低的感量。 In practice, the striking end of the first winding group L1 and the striking end of the third winding group L3 are reversed. The striking end of the second winding group L2 and the striking end of the sixth winding group L6 are opposite to each other. The striking end of the fourth winding group L4 and the striking end of the fifth winding group L5 are opposite to each other. Thereby, a reverse coupled magnetic flux is generated between the two winding groups L1, L3, L2, L6, L4, L5 to obtain a lower inductance in high frequency applications.
進一步來說，根據繞線組L1、L3、L2、L6、L4、L5打點方向的情況，可以分成磁通量向上流和磁通量向下流等兩種情況。因此，第一繞線組L1與第三繞線組L3之打點方向為反向時，即表示於同一柱P1上存在向上流及向下流的磁通量。所以，第一繞線組L1與第三繞線組L3之間產生反向耦合磁通。當耦合感量M小於零時，則得到在高頻應用下之較低的感量。同理可推知其他柱P2~P3上的其他繞線組L2、L4~L6的運作情況。 Further, according to the case of the winding directions of the winding groups L1, L3, L2, L6, L4, and L5, it is possible to divide into two cases of upward flux of magnetic flux and downward flow of magnetic flux. Therefore, when the striking direction of the first winding group L1 and the third winding group L3 is reversed, it means that there is an upward and downward magnetic flux on the same column P1. Therefore, a reverse coupling magnetic flux is generated between the first winding group L1 and the third winding group L3. When the coupling inductance M is less than zero, a lower sensitivity is obtained in high frequency applications. Similarly, the operation of other winding groups L2, L4~L6 on other columns P2~P3 can be inferred.
值得一提的是，在三相對稱的習知鐵芯架構移除中心柱後，在功率開關Q1~Q3工作週期重疊的情況下，將使得磁通量大量抵銷，此情況可能導致在電感的應用上，失去限制電流的能力。因此，本實施例係增加額外的電感體積，如圖1A及圖1B中的該些第一翼部F1~F3及該些第二翼部F4~F6，致使在任何功率開關Q1~Q3的工作週期下，三相耦合電感1都不會發生失去限制電流的能力。 It is worth mentioning that after the three-phase symmetric conventional core structure removes the center column, the power flux Q1~Q3 overlaps, which will cause the magnetic flux to be largely offset. This situation may lead to the application of the inductor. On, the ability to limit the current. Therefore, in this embodiment, an additional inductor volume is added, such as the first wing portions F1 to F3 and the second wing portions F4 to F6 in FIGS. 1A and 1B, resulting in operation of any power switch Q1~Q3. During the cycle, the three-phase coupled inductor 1 does not have the ability to lose current.
圖5A為本發明另一實施例之三相耦合電感之第一鐵芯示意圖。圖5B為本發明另一實施例之三相耦合電感之第二鐵芯示意圖。其中，圖5A及圖5B中的三相耦合電感1a與圖1A及圖1B中的三相耦合電感1二者架構相似。而三相耦合電感1a、1二者的差異在於：第一鐵芯E1a的中心部為六角形板，並具有六個側臂部A1a~A6a、六個翼部F1a~F6a及六支柱體P1~P6。而第二鐵芯E2a係對應第一鐵芯E1a的態樣，並具有六個側臂部A7a~A12a及六個翼部F7a~F12a。 FIG. 5A is a schematic diagram of a first iron core of a three-phase coupled inductor according to another embodiment of the present invention. FIG. 5B is a schematic diagram of a second core of a three-phase coupled inductor according to another embodiment of the present invention. The three-phase coupled inductor 1a in FIGS. 5A and 5B is similar in structure to the three-phase coupled inductor 1 in FIGS. 1A and 1B. The difference between the three-phase coupled inductors 1a and 1 is that the central portion of the first core E1a is a hexagonal plate and has six side arm portions A1a to A6a, six wing portions F1a to F6a, and six pillars P1. ~P6. The second core E2a corresponds to the first core E1a and has six side arm portions A7a to A12a and six wing portions F7a to F12a.
詳細來說，第一側臂部A1a~A6a例如為由中心部往外延伸的臂板。也就是說，第一中心部CP1a為正六角形，且一第一側臂部A6a以一點鐘方向延伸，另一第一側臂部A5a以三點鐘方向延伸，另一第一側臂部A4a以五點鐘方向延伸，另一第一側臂部A3a以七點鐘方向延伸，另一第一側臂部A2a以九點鐘方向延伸，另一第一側臂部A1a以十一點鐘方向延伸。而各第一翼部F1a~F6a例如為等腰三角形板、弧形板或扇形板或其他形狀板。也就是，兩兩側臂部A1a~A6a之間相隔60度。 Specifically, the first side arm portions A1a to A6a are, for example, arm plates that extend outward from the center portion. That is, the first central portion CP1a has a regular hexagon shape, and one first side arm portion A6a extends in one o'clock direction, the other first side arm portion A5a extends in a three o'clock direction, and the other first side arm portion A4a Extending in the five o'clock direction, the other first side arm portion A3a extends in the seven o'clock direction, the other first side arm portion A2a extends in the nine o'clock direction, and the other first side arm portion A1a is in the eleven o'clock. The direction extends. Each of the first wing portions F1a to F6a is, for example, an isosceles triangular plate, a curved plate or a sector plate or other shape plate. That is, the two side arms A1a to A6a are separated by 60 degrees.
舉例來說，本實施例之第一翼部F3a的一第一底邊BL1a與相鄰的第一側臂部A3a的一第一側邊SL1a的內夾角α小於九十度。而第二翼部F9a的一第二底邊BL2a與相鄰的第二側臂部A9a的一第二側邊SL2a的內夾角β小於九十度。簡單來說，本實施例將避免掉大轉折角度(如約90度的轉角)，致使磁力線均勻分布在各第一翼部 F1a~F6a(或各第二翼部F7a~F12a)的磁路上。所屬技術領域具有通常知識者根據本實施例之技術精神，可自由設計第一鐵芯E1a及第二鐵芯E2a的態樣。其餘部分均相同，在此不予贅述。 For example, the inner angle α of a first bottom edge BL1a of the first wing portion F3a of the embodiment and a first side edge SL1a of the adjacent first side arm portion A3a is less than ninety degrees. The inner angle β of a second bottom edge BL2a of the second wing portion F9a and a second side edge SL2a of the adjacent second side arm portion A9a is less than ninety degrees. In brief, this embodiment will avoid large turning angles (such as a corner of about 90 degrees), so that the magnetic lines of force are evenly distributed in the first wing. The magnetic path of F1a~F6a (or each of the second wing parts F7a~F12a). According to the technical spirit of the present embodiment, the first core E1a and the second core E2a can be freely designed. The rest are the same and will not be repeated here.
圖6為本發明另一實施例之三相耦合電感之分解示意圖。圖7A為根據圖6之本發明另一實施例之三相耦合電感之組合示意圖。圖7B為根據圖6之本發明另一實施例之三相耦合電感之組合示意圖。其中，圖6與圖2中的三相耦合電感1a、1二者架構相似。而三相耦合電感1a、1二者的差異在於：三相耦合電感1a的每一線路板B1a~B3a具有四組繞線組(未繪示)。 FIG. 6 is an exploded perspective view of a three-phase coupled inductor according to another embodiment of the present invention. FIG. 7A is a schematic diagram of a combination of three-phase coupled inductors according to another embodiment of the present invention. FIG. FIG. 7B is a schematic diagram of a combination of three-phase coupled inductors according to another embodiment of the present invention. FIG. Among them, the three-phase coupled inductors 1a, 1 in FIG. 6 and FIG. 2 are similar in structure. The difference between the three-phase coupled inductors 1a and 1 is that each of the circuit boards B1a to B3a of the three-phase coupled inductor 1a has four sets of winding groups (not shown).
為了方便說明，各線路板B1a~B3a例如為六角形狀板。在其他實施例中，各線路板B1a~B3a亦可為方形板、圓形板或不規則形板。此外，本實施例之線路板B1a~B3a的數量例如為三片。在其他實施例中，線路板的數量例如為六片、九片或其他數值片。例如，線路板為六片時，每一線路板係具有兩組繞線。且每一柱體P1~P3上的兩個繞線組為打點反向。本實施例不限制線路板B1a~B3a的形狀、數量及其具有繞線的組數。 For convenience of explanation, each of the circuit boards B1a to B3a is, for example, a hexagonal plate. In other embodiments, each of the circuit boards B1a to B3a may also be a square plate, a circular plate or an irregular plate. Further, the number of the wiring boards B1a to B3a of the present embodiment is, for example, three. In other embodiments, the number of boards is, for example, six, nine, or other value sheets. For example, when the circuit board is six, each circuit board has two sets of windings. And the two winding groups on each of the columns P1~P3 are reversed by the dot. This embodiment does not limit the shape and number of the wiring boards B1a to B3a and the number of groups having windings.
詳細來說，三相耦合電感1a包括一第一、一第二及一第三線路板B1a~B3a及一鐵芯組10。第一線路板B1a、第二線路板B2a及第三線路板B3a分別具有四組繞線。在實務上，第一線路板B1a具有一第一繞線組(未繪示)、一第二繞線組(未繪示)、一第三繞線組(未繪示)及一第四繞線組(未繪示)。 In detail, the three-phase coupled inductor 1a includes a first, a second and a third circuit board B1a to B3a and a core group 10. The first circuit board B1a, the second circuit board B2a, and the third circuit board B3a have four sets of windings, respectively. In practice, the first circuit board B1a has a first winding group (not shown), a second winding group (not shown), a third winding group (not shown), and a fourth winding. Line group (not shown).
同理可知，第二線路板B2a具有一第五繞線組(未繪示)、一第六繞線組(未繪示)、一第七繞線組(未繪示)及一第八繞線組(未繪示)。第三線路板B3a具有一第九繞線組(未繪示)、一第十繞線組(未繪示)、一第十一繞線組(未繪示)及一第十二繞線組(未繪示)。 Similarly, the second circuit board B2a has a fifth winding group (not shown), a sixth winding group (not shown), a seventh winding group (not shown), and an eighth winding. Line group (not shown). The third circuit board B3a has a ninth winding group (not shown), a tenth winding group (not shown), an eleventh winding group (not shown), and a twelfth winding group. (not shown).
第一繞線組、第三繞線組、第六繞線組、第八繞線組、第十繞線組及第十二繞線組分別為逆時針繞線線圈。而第二繞線組、第四繞線組、第五繞線組、第七繞線組、第九繞線組及第十一繞 線組分別為順時針繞線線圈。 The first winding group, the third winding group, the sixth winding group, the eighth winding group, the tenth winding group, and the twelfth winding group are respectively counterclockwise winding coils. And the second winding group, the fourth winding group, the fifth winding group, the seventh winding group, the ninth winding group, and the eleventh winding The line groups are respectively clockwise winding coils.
其中，第一繞線組的打點端與第五繞線組的打點端之打點方向為反向。第二繞線組的打點端與第八繞線組的打點端之打點方向為反向。第三繞線組的打點端與第十一繞線組的打點端之打點方向為反向。 The striking end of the first winding group and the striking end of the fifth winding group are opposite to each other. The striking end of the second winding group and the striking end of the eighth winding group are opposite to each other. The striking end of the third winding group and the striking end of the eleventh winding group are opposite to each other.
第四繞線組的打點端與第十二繞線組的打點端之打點方向為反向。第六繞線組的打點端與第九繞線組的打點端之打點方向為反向。第七繞線組的打點端與第十繞線組的打點端之打點方向為反向。 The striking end of the fourth winding group and the striking end of the twelfth winding group are opposite to each other. The striking end of the sixth winding group and the striking end of the ninth winding group are opposite to each other. The striking end of the seventh winding group and the striking end of the tenth winding group are opposite to each other.
也就是說，第一繞線組與第五繞線組產生反向耦合磁通。第二繞線組與第八繞線組產生反向耦合磁通。第三繞線組與第十一繞線組產生反向耦合磁通。第四繞線組與第十二繞線組產生反向耦合磁通。第六繞線組與第九繞線組產生反向耦合磁通。第七繞線組與第十繞線組產生反向耦合磁通。藉此兩兩繞線組之間產生反向耦合磁通，以得到在高頻應用下之較低的感量。 That is, the first winding group and the fifth winding group generate a reverse coupling magnetic flux. The second winding group and the eighth winding group generate a reverse coupling magnetic flux. The third winding group and the eleventh winding group generate a reverse coupling magnetic flux. The fourth winding group and the twelfth winding group generate a reverse coupling magnetic flux. The sixth winding group and the ninth winding group generate a reverse coupling magnetic flux. The seventh winding group and the tenth winding group generate a reverse coupling magnetic flux. Thereby a reverse coupled magnetic flux is generated between the two winding sets to obtain a lower inductance in high frequency applications.
此外，第一鐵芯E1a具有六支柱體P1~P6，該些柱體P1~P6分別為一第一柱P1、一第二柱P2、一第三柱P3、一第四柱P4、一第五柱P5及一第六柱P6。第一繞線組圍繞第一柱P1。第二繞線組圍繞第二柱P2。第三繞線組圍繞第三柱P3。第四繞線組圍繞第四柱P4。第五繞線組圍繞第一柱P1。第六繞線組圍繞第五柱P5。第七繞線組圍繞第六柱P6。第八繞線組圍繞第二柱P2。第九繞線組圍繞第五柱P5。第十繞線組圍繞第六柱P6。第十一繞線組圍繞第三柱P3。第十二繞線組圍繞第四柱P4。 In addition, the first core E1a has six pillars P1 to P6, and the pillars P1 to P6 are a first pillar P1, a second pillar P2, a third pillar P3, a fourth pillar P4, and a first pillar. Five columns P5 and one sixth column P6. The first winding group surrounds the first column P1. The second winding group surrounds the second column P2. The third winding group surrounds the third column P3. The fourth winding group surrounds the fourth column P4. The fifth winding group surrounds the first column P1. The sixth winding group surrounds the fifth column P5. The seventh winding group surrounds the sixth column P6. The eighth winding group surrounds the second column P2. The ninth winding group surrounds the fifth column P5. The tenth winding group surrounds the sixth column P6. The eleventh winding group surrounds the third column P3. The twelfth winding group surrounds the fourth column P4.
值得一提的是，第一線路板B1a、第二線路板B2a及第三線路板B3a分別具有六個穿孔結構h11~h16、h21~h26、h31~h36。第一線路板B1a的該些穿孔結構h11~h16與第二線路板B2a的該些穿孔結構h21~h26相互對應，第二線路板B2a的該些穿孔結構h21~h26與第三線路板B3a的該些穿孔結構h31~h36相互對應，致使第一鐵 芯E1a的該些柱體P1~P6對應穿設第一線路板B1a、第二線路板B2a及第三線路板B3a，並連接至第二鐵芯E2a。其餘部分均相同，在此不予贅述。 It is worth mentioning that the first circuit board B1a, the second circuit board B2a and the third circuit board B3a respectively have six perforated structures h11~h16, h21~h26, h31~h36. The perforated structures h11~h16 of the first circuit board B1a and the perforated structures h21~h26 of the second circuit board B2a correspond to each other, and the perforated structures h21~h26 of the second circuit board B2a and the third circuit board B3a The perforated structures h31~h36 correspond to each other, resulting in the first iron The pillars P1 to P6 of the core E1a are correspondingly disposed through the first circuit board B1a, the second circuit board B2a, and the third circuit board B3a, and are connected to the second core E2a. The rest are the same and will not be repeated here.
綜上所述，本發明為一種三相耦合電感，透過將習知鐵芯的中心柱移除，並使第一及第二鐵芯的板體上增加翼部的設計，以增加額外的磁路體積，藉此防止「在工作週期大於66%時，導致鐵芯的整體感量二次抵消」之情況。其中，翼部的設計將避免掉大轉折角度(如約90度的轉角)，致使磁力線均勻分布在各翼部的磁路上。此外，相較於習知鐵芯的體積，本實施例之鐵芯組總體積係具有較小的體積，以獲得較低的鐵芯損耗。再者，每一柱上設置有兩組繞線組，而兩組繞線組的打點方向為反向，藉此兩兩繞線組產生反向耦合磁通。且每一繞線組均勻的分布於鐵芯組的該些柱體的其中之一上，藉此提升三相耦合電感之高效率及高功率密度等特性。如此一來，本實施例確實可提升三相耦合電感的使用方便性。 In summary, the present invention is a three-phase coupled inductor that increases the extra magnetic by removing the center post of a conventional iron core and adding a wing design to the first and second core plates. The volume of the road, thereby preventing the situation that "the overall inductance of the core is cancelled twice when the duty cycle is greater than 66%". Among them, the design of the wing will avoid large turning angles (such as a corner of about 90 degrees), so that the magnetic lines of force are evenly distributed on the magnetic circuit of each wing. In addition, the total volume of the core group of the present embodiment has a smaller volume than that of the conventional iron core to obtain a lower core loss. Furthermore, two sets of winding groups are arranged on each column, and the striking directions of the two sets of winding groups are reversed, whereby the two pairs of winding groups generate a reverse coupled magnetic flux. And each winding group is uniformly distributed on one of the pillars of the iron core group, thereby improving characteristics such as high efficiency and high power density of the three-phase coupling inductor. In this way, the embodiment can indeed improve the usability of the three-phase coupled inductor.
以上所述僅為本發明之實施例，其並非用以侷限本發明之專利範圍。 The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.
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| US20080024259A1 (en) * | 2002-04-18 | 2008-01-31 | Sriram Chandrasekaran | Extended E Matrix Integrated Magnetics (MIM) Core |
| TW201126550A (en) * | 2009-08-10 | 2011-08-01 | Volterra Semiconductor Corp | Coupled inductor with improved leakage inductance control |
| US20110241799A1 (en) * | 2010-03-31 | 2011-10-06 | Shuo Wang | Multi-phase emi noise separator |
| TW201203825A (en) * | 2010-01-14 | 2012-01-16 | Volterra Semiconductor Corp | Asymmetrical coupled inductors, multiphase DC-to-DC converters, and controller for controlling operation of multiphase DC-to-DC converter |
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| US20080024259A1 (en) * | 2002-04-18 | 2008-01-31 | Sriram Chandrasekaran | Extended E Matrix Integrated Magnetics (MIM) Core |
| TW201126550A (en) * | 2009-08-10 | 2011-08-01 | Volterra Semiconductor Corp | Coupled inductor with improved leakage inductance control |
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