WO2021104424A1 - Ltcc高压变压器 - Google Patents

Ltcc高压变压器 Download PDF

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Publication number
WO2021104424A1
WO2021104424A1 PCT/CN2020/132126 CN2020132126W WO2021104424A1 WO 2021104424 A1 WO2021104424 A1 WO 2021104424A1 CN 2020132126 W CN2020132126 W CN 2020132126W WO 2021104424 A1 WO2021104424 A1 WO 2021104424A1
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column
magnetic core
ltcc
present disclosure
permeability
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PCT/CN2020/132126
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English (en)
French (fr)
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赵斌
王刚
王东蕾
赵燕
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中国科学院空天信息创新研究院
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Publication of WO2021104424A1 publication Critical patent/WO2021104424A1/zh

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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
    • 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
    • H01F27/24—Magnetic cores
    • 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
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields

Definitions

  • the present disclosure relates to the field of power equipment, and in particular to a high-voltage transformer based on Low Temperature Co-firing Ceramics (LTCC).
  • LTCC Low Temperature Co-firing Ceramics
  • Low Temperature Co-fired Ceramic LTCC technology has been widely used in the field of radio frequency and microwave.
  • high frequency ferrite materials suitable for LTCC technology and switching power supply operating frequency bands domestic and foreign Both have carried out research on magnetic devices based on the LTCC process.
  • high power density, ultra-thin size magnetic devices can be produced.
  • the thermal expansion coefficient of the LTCC material is close to that of the semiconductor material, which can realize the three-dimensional integration of the power supply.
  • the LTCC planar high-voltage transformer integrates windings, magnetic cores and lead wires together to form a low-profile SMD packaged device. Therefore, it has the advantages of low cost, low loss, small volume, high reliability, and easy mass production.
  • the present disclosure provides an LTCC high-voltage transformer to at least partially solve the above-mentioned technical problems.
  • an LTCC high-voltage transformer which sequentially includes from top to bottom: an upper side column, a magnetic core center column, and a lower side column; further including:
  • the primary coil and the secondary coil are fired in the central column of the magnetic core
  • a plurality of first media are uniformly distributed on the central pillar of the magnetic core along the longitudinal direction;
  • a plurality of second media are respectively arranged between adjacent two-turn primary coils, two-turn secondary coils, or between the primary coil and the secondary coil.
  • it further includes: a plurality of connecting holes, which are respectively provided on the first medium.
  • the material of the upper side pillar is a high magnetic permeability material, and the magnetic permeability of the high magnetic permeability material is not less than 400.
  • the material of the lower side pillar is a high-permeability material, and the permeability of the high-permeability material is not less than 400.
  • the material of the pillar in the magnetic core is a low-permeability material, and the permeability of the low-permeability material is not greater than 100.
  • the relative permeability of the upper column and the lower column is greater than the relative permeability of the central column of the magnetic core.
  • the adjacent primary coils are filled with a plurality of the second media.
  • the present disclosure realizes the requirement for adjusting the magnetizing inductance of the transformer in practical applications through the first medium arranged on the central column of the magnetic core.
  • the present disclosure effectively reduces the magnetic leakage in the vertical direction and realizes the effect of low leakage inductance.
  • the present disclosure effectively reduces the magnetic leakage in the horizontal direction of the transformer and realizes the effect of low leakage inductance.
  • the present disclosure reduces the overlap area between the primary and the secondary by adopting the transformer winding structure, and effectively reduces the parasitic capacitance.
  • the present disclosure effectively avoids the problem of delamination during the sintering process caused by the introduction of the medium by arranging connecting holes on the central pillar of the magnetic core.
  • FIG. 1 is a schematic structural diagram of an LTCC transformer adopting a transformer winding structure in the prior art.
  • Fig. 2 is a schematic structural diagram of an LTCC transformer adopting a transformer winding structure in the prior art.
  • Fig. 3 is a schematic structural diagram of an LTCC transformer adopting a planar transformer winding structure in the prior art.
  • FIG. 4 is a schematic diagram of the structure of an LTCC high-voltage transformer according to an embodiment of the disclosure.
  • the present disclosure provides an LTCC high-voltage transformer including an upper side column, a magnetic core center column, a lower side column, a primary coil, a secondary coil, a first medium and a second medium, and the upper side column, the magnetic core center column and the lower side column are drawn from the top
  • the primary coil and the secondary coil are arranged on the central column of the magnetic core; a plurality of first media are uniformly distributed on the central column of the magnetic core along the longitudinal direction; and a plurality of second media are respectively arranged on the central column of the magnetic core. Between adjacent two turns of coils.
  • the present disclosure can effectively reduce the magnetic leakage in the horizontal and vertical directions of the transformer, and realize the effect of low leakage inductance.
  • FIG. 1 is a schematic structural diagram of an LTCC transformer adopting a transformer winding structure in the prior art.
  • Fig. 2 is a schematic structural diagram of an LTCC transformer adopting a transformer winding structure in the prior art. As shown in Figure 1, when the transformer winding structure is used, the leakage flux distribution is shown by the arrow in Figure 2, which is divided into horizontal leakage flux and vertical leakage flux.
  • the horizontal leakage flux is due to the LTCC transformer sintering the winding and the magnetic core together, resulting in a magnetic medium filled between two adjacent layers of conductors. Therefore, the reluctance of the magnetic medium between the two layers of conductors can be compared with the reluctance of the upper and lower legs of the transformer, resulting in leakage flux in the horizontal direction.
  • the vertical leakage flux is similar to the horizontal leakage flux.
  • the LTCC transformer sinters the winding and the magnetic core together, which causes the magnetic medium to be filled between two adjacent turns of the winding. Therefore, the reluctance of the magnetic medium between two adjacent turns can be compared with the reluctance of the transformer core column and the side column of the magnetic core, which causes the leakage flux in the vertical direction. Different from the horizontal magnetic flux leakage, as the air gap of the magnetic core column increases, the magnetic resistance of the magnetic core column will further increase, resulting in a further increase of the vertical magnetic leakage flux.
  • the measures taken to reduce leakage inductance in practical applications are: the use of a staggered winding structure can reduce the leakage flux in the vertical direction, but it cannot solve the leakage flux in the horizontal direction.
  • the use of a staggered winding structure can reduce the leakage flux in the vertical direction, but it cannot solve the leakage flux in the horizontal direction.
  • the interleaved winding structure is adopted, there is still a large leakage inductance.
  • the flyback converter due to the existence of large leakage inductance, the main switch tube voltage stress is large, and the efficiency of the converter is reduced at the same time.
  • Fig. 3 is a schematic structural diagram of an LTCC transformer adopting a planar transformer winding structure in the prior art.
  • the use of a planar transformer winding structure can effectively reduce the vertical leakage inductance.
  • the coupling coefficient between the primary and secondary of the transformer can be increased to more than 90%.
  • the overlapping area of the transformer primary and secondary is significantly increased, resulting in a larger parasitic capacitance.
  • the parasitic capacitance limits the output voltage of the converter, and at the same time increases the winding loss of the transformer and reduces the efficiency.
  • an LTCC high voltage transformer is provided.
  • Fig. 4 is a schematic diagram of the structure of an LTCC high-voltage transformer according to an embodiment of the disclosure.
  • the LTCC high voltage transformer of the present disclosure includes: upper side column 1, magnetic core center column 3, lower side column 2, primary coil 4, secondary coil 5, first medium 6 and second medium 7, upper side column 1,
  • the core column 3 and the lower side column 2 are arranged in sequence from top to bottom, the primary coil 4 and the secondary coil 5 are fired in the core column 3; a plurality of first media 6 are uniformly distributed in the core along the longitudinal direction On the column 3, a plurality of second media 7 are respectively arranged between two adjacent turns of the coil.
  • two adjacent turns of the coil can make four turns of the primary wire, two turns of the secondary coil 5 or one turn of the primary coil 4 and one turn of the secondary coil 5.
  • the second medium 7 when the second medium 7 is arranged between two adjacent turns of the secondary coil 5, the second medium 7 can be arranged to fill the adjacent two turns of the secondary coil 5 completely.
  • a plurality of connecting holes 8 are provided on the first medium 6.
  • the materials of the upper side pillar 1 and the lower side pillar 2 are both high-permeability materials; and the material of the central pillar 3 of the magnetic core is a low-permeability material. It should be noted here that the permeability of high-permeability materials is not less than 400; the permeability of low-permeability materials is not more than 100.
  • the high permeability material selected for the upper side pillar 1 is ESL 40012, but it is not limited to this, and other materials known to those skilled in the art that can achieve similar effects are applicable. According to actual design requirements, the upper side pillar 1 can be designed in different shapes, and the thickness is designed according to the requirements for leakage inductance and size.
  • the relative permeability of the high-permeability material selected for the upper column 1 is greater than the relative permeability of the low-permeability material selected for the center column 3 of the magnetic core.
  • the high permeability material selected for the lower side pillar 2 is ESL 40011, but it is not limited to this, and other materials known to those skilled in the art that can achieve similar effects are applicable. It is the same as the high permeability material selected for the upper side column 1. According to actual design requirements, the lower side column 2 can be designed in different shapes, and the thickness is designed according to the requirements for leakage inductance and size.
  • the relative permeability of the high-permeability material selected for the lower column 2 is greater than the relative permeability of the low-permeability material selected for the center column 3 of the magnetic core.
  • the low-permeability material selected for the column 3 of the magnetic core is ESL's 4926-R, but it is not limited to this, and other materials known to those skilled in the art that can achieve similar effects are applicable.
  • the central pillar 3 of the magnetic core can be designed in different shapes, and the thickness of two adjacent layers can be designed according to the withstand voltage strength and the requirements of the transformer for leakage inductance.
  • the relative permeability of the low-permeability material selected for the central column 3 of the magnetic core is smaller than the relative permeability of the high-permeability material selected for the lower column 2 or the upper column 1.
  • the first medium 6 is a non-magnetic medium and serves as the air gap of the LTCC high-voltage transformer. According to the actual circuit needs, the thickness of the air gap is designed to meet the required excitation inductance.
  • the connecting holes 8 are provided with a plurality of connecting holes 8 on the first medium 6 of the central pillar 3 of the magnetic core for connecting the magnetic materials separated by the first medium 6.
  • the number of turns of the primary coil 4 is designed according to the needs of the actual circuit.
  • the width and thickness of the primary coil 4 are further adjusted according to the requirements of the efficiency and the AC resistance and the limitation of the transformer volume.
  • the secondary coil 5 is similar to the primary coil 4.
  • the number of turns is designed according to the needs of the actual circuit, and the width and thickness of the primary coil 4 are further adjusted according to the requirements of the AC resistance of the efficiency team and the limitation of the volume of the transformer.
  • the second medium 7 is a non-magnetic conductive medium, which is used to increase the magnetic resistance of the magnetic core column 3 in the vertical direction, thereby reducing the magnetic flux leakage of the magnetic core column 3 in the vertical direction.
  • the present disclosure provides an LTCC transformer, which can be used to replace high-voltage transformers in current high-reliability high-voltage applications (such as high-voltage ignition devices, atomic clock ion pump power supplies, vacuum electronic device power supplies, etc.), which greatly improves the reliability of the system It is a very promising technology to reduce the volume and reduce the cost. It has a very broad application prospect and is of great significance to the miniaturization of equipment.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

本公开提供了一种LTCC高压变压器包括，上边柱、磁芯中柱、下边柱、初级线圈、次级线圈、第一介质和第二介质，上边柱、磁芯中柱和下边柱自上而下顺次设置，初级线圈和次级线圈设置于所述磁芯中柱上；多个第一介质，沿纵向均匀分布在所述磁芯中柱上；多个第二介质，分别设置在相邻两匝线圈间。本公开能够有效的降低了变压器水平方向和垂直方向的漏磁，实现低漏感的效果。

Description

LTCC高压变压器 技术领域
本公开涉及电力设备领域，尤其涉及一种基于低温共烧陶瓷(Low Temperature Co-firing Ceramics，LTCC)的高压变压器。
背景技术
低温共烧陶瓷(Low Temperature Co-fired Ceramic LTCC)技术，在射频微波领域得到较广泛的应用，近年来，随着适合LTCC工艺以及开关电源工作频段的高频铁氧体材料的开发，国内外均开展了基于LTCC工艺的磁性器件的研究。采用LTCC工艺，可实现制作高功率密度，超薄尺寸的磁性器件。此外，LTCC材料与半导体材料热膨胀系数接近，可实现电源的三维立体化集成。LTCC平面高压变压器将绕组与磁芯及引出线集成烧结在一起，可形成低轮廓的SMD封装器件，因而，具有低成本、低损耗、小体积、高可靠，便于大批量生产等优点。
但是，普通高压变压器采用分立铁氧体磁芯和有机绝缘材料灌封高压线包组装而成，还存在如工序复杂、无法自动生产，成本高；含有有机材料，无法密封，耐温、耐湿差；非一体化结构，热阻大，功率密度低等问题，亟需技术人员进一步研发更加适合的解决方案。
发明内容
(一)要解决的技术问题
本公开提供了一种LTCC高压变压器，以至少部分解决以上所提出的技术问题。
(二)技术方案
根据本公开的一个方面，提供了一种LTCC高压变压器，自上而下顺次包括：上边柱、磁芯中柱和下边柱；还包括：
初级线圈和次级线圈，烧制于所述磁芯中柱中；
多个第一介质，沿纵向均匀分布在所述磁芯中柱上；
多个第二介质，分别设置在相邻两匝初级线圈、两匝次级线圈或初级线圈和次级线圈间。
在本公开的一些实施例中，还包括：多个连接孔，分别设置于所述第一介质上。
在本公开的一些实施例中，所述上边柱的材料为高磁导率材料，所述高磁导率材料的磁导率为不小于400。
在本公开的一些实施例中，所述下边柱的材料为高磁导率材料，所述高磁导率材料的磁 导率为不小于400。
在本公开的一些实施例中，所述磁芯中柱的材料为低磁导率材料，所述低磁导率材料的磁导率为不大于100。
在本公开的一些实施例中，所述上边柱和所述下边柱的相对磁导率大于所述磁芯中柱的相对磁导率。
在本公开的一些实施例中，相邻所述初级线圈间通过多个所述第二介质填充。
(三)有益效果
从上述技术方案可以看出，本公开LTCC高压变压器至少具有以下有益效果其中之一或其中一部分：
(1)本公开通过磁芯中柱上设置的第一介质，实现了在实际应用中对于调节变压器励磁电感的要求。
(2)本公开通过相邻两匝之间的第二介质的应用，有效的降低了垂直方向的漏磁，实现低漏感的效果。
(3)本公开通过高磁导率材料和低磁导率材料的应用，有效的降低了变压器水平方向的漏磁，实现低漏感的效果。
(4)本公开通过采用变压器绕组结构，降低了初级和次级之间的交叠面积，有效的降低了寄生电容。
(5)本公开通过在磁芯中柱上设置连接孔，有效的避免了引入介质造成的烧结过程中分层的问题。
附图说明
图1为现有技术中采用变压器绕组结构的LTCC变压器的结构示意图。
图2为现有技术中采用变压器绕组结构的LTCC变压器的结构示意图。
图3为现有技术中采用平面变压器绕组结构的LTCC变压器的结构示意图。
图4为本公开实施例LTCC高压变压器的结构示意图。
【附图中本公开实施例主要元件符号说明】
1-上边柱；2-下边柱；3-磁芯中柱；4-初级线圈；5-次级线圈；6-第一介质；7-第二介质；8-连接孔。
具体实施方式
本公开提供了一种LTCC高压变压器包括，上边柱、磁芯中柱、下边柱、初级线圈、次 级线圈、第一介质和第二介质，上边柱、磁芯中柱和下边柱自上而下顺次设置，初级线圈和次级线圈设置于所述磁芯中柱上；多个第一介质，沿纵向均匀分布在所述磁芯中柱上；多个第二介质，分别设置在相邻两匝线圈间。本公开能够有效的降低了变压器水平方向和垂直方向的漏磁，实现低漏感的效果。
为使本公开的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本公开进一步详细说明。
本公开某些实施例于后方将参照所附附图做更全面性地描述，其中一些但并非全部的实施例将被示出。实际上，本公开的各种实施例可以许多不同形式实现，而不应被解释为限于此数所阐述的实施例；相对地，提供这些实施例使得本公开满足适用的法律要求。
图1为现有技术中采用变压器绕组结构的LTCC变压器的结构示意图。图2为现有技术中采用变压器绕组结构的LTCC变压器的结构示意图。如图1所示，当采用变压器绕组结构时，漏磁通分布如图2中箭头所示，分为水平漏磁通和垂直漏磁通。
其中水平漏磁通，如图2所示，由于LTCC变压器将绕组与磁芯烧结在一起，从而造成相邻两层导体之间填充了磁性介质。因此，两层导体之间磁介质的磁阻，与变压器上边柱和下边柱的磁阻可以相互比拟，造成了水平方向的漏磁通。
其中垂直漏磁通，与水平漏磁通类似，如图2所示，由于LTCC变压器将绕组与磁芯烧结在一起，从而造成绕组的相邻两匝之间填充了磁性介质。因此，相邻两匝之间磁介质的磁阻，与变压器磁芯中柱和磁芯侧柱的磁阻可以相互比拟，从而造成了垂直方向的漏磁通。与水平漏磁通不同的是，随着磁芯中柱气隙的增加，磁芯中柱的磁阻将进一步增大，从而造成垂直方向的漏磁通进一步增大。
一般在实际应用中采取的降低漏感的措施为：采用交错绕组结构可以降低垂直方向的漏磁通，但无法解决水平方向的漏磁通。特别的，在磁芯中柱开气隙时，即使采用交错绕组结构，依然存在较大的漏感。在反激变换器中，由于大漏感的存在，造成主开关管电压应力大，同时降低了变换器的效率。
图3为现有技术中采用平面变压器绕组结构的LTCC变压器的结构示意图。如图3所示，采用平面变压器绕组结构可以有效的降低垂直方向的漏感。在采用交错绕组结构时，可以将变压器初级和次级的耦合系数提高到90％以上。但是，如图3所示可以看出，与变压器绕组结构相比，在平面变压器绕组结构中，变压器初级和次级的交叠面积显著增大，从而造成了较大的寄生电容。在反激变换器中，该寄生电容限制了变换器的输出电压，同时增加了变压器的绕组损耗，降低了效率。
在本公开的第一个示例性实施例中，提供了一种LTCC高压变压器。图4为本公开实施 例LTCC高压变压器的结构示意图。如图4所示，本公开LTCC高压变压器包括：上边柱1、磁芯中柱3、下边柱2、初级线圈4、次级线圈5、第一介质6和第二介质7，上边柱1、磁芯中柱3和下边柱2自上而下顺次设置，初级线圈4和次级线圈5烧制于磁芯中柱3中；多个第一介质6，沿纵向均匀分布在磁芯中柱3上，多个第二介质7，分别设置在相邻两匝线圈间。这里需要说明的是，相邻两匝线圈可以两匝出初级线4圈，两匝次级线圈5或一匝初级线圈4和一匝次级线圈5。在一个具体实施例中，在相邻两匝次级线圈5间设置第二介质7时，可以通过设置第二介质7将相邻两匝次级线圈5填充完整。第一介质6上设置有多个连接孔8。上边柱1和下边柱2的材料均为高磁导率材料；且磁芯中柱3的材料为低磁导率材料。这里需要说明的是，高磁导率材料的磁导率为不小于400；低磁导率材料的磁导率为不大于100。
以下分别对本公开LTCC高压变压器各个组成部分进行详细说明。
上边柱1选用的高磁导率材料为ESL公司的40012，但并不限于此，其他本领域技术人员可获知的能够实现相似效果的材料均可适用。根据实际设计需要，上边柱1可以设计成不同的形状，并根据对漏感的需要以及尺寸的要求设计厚度。上边柱1选用的高磁导率材料的相对磁导率大于磁芯中柱3选用的低磁导率材料的相对磁导率。通过在上边柱1上应用高磁导率材料，使得本公开提供的LTCC高压变压器在水平方向的漏磁通得到抑制。
下边柱2选用的高磁导率材料为ESL公司的40011，但并不限于此，其他本领域技术人员可获知的能够实现相似效果的材料均可适用。与上边柱1选用的高磁导率材料相同。根据实际设计需要，下边柱2可以设计成不同的形状，并根据对漏感的需要以及尺寸的要求设计厚度。下边柱2选用的高磁导率材料的相对磁导率大于磁芯中柱3选用的低磁导率材料的相对磁导率。通过在下边柱2上应用高磁导率材料，使得本公开提供的LTCC高压变压器在水平方向的漏磁通得到抑制。
磁芯中柱3选用的低磁导率材料为ESL公司的4926-R，但并不限于此，其他本领域技术人员可获知的能够实现相似效果的材料均可适用。根据实际设计要求，磁芯中柱3可以设计成不同的形状，并根据耐压强度、变换器对漏感的要求设计相邻两层的厚度。磁芯中柱3选用的低磁导率材料的相对磁导率小于下边柱2或上边柱1选用的高磁导率材料的相对磁导率。通过在磁芯中柱3上应用低磁导率材料，使得本公开提供的LTCC高压变压器在水平方向的漏磁通得到抑制。
第一介质6，为非导磁介质，作为LTCC高压变压器的气隙。根据实际电路需要，设计气隙厚度，从而满足所需要的励磁电感。
连接孔8，为避免在烧结过程中分层，在磁芯中柱3的第一介质6上设置多个连接孔8，用于连接被第一介质6分开的磁性材料。
初级线圈4，根据实际电路的需要设计匝数，本根据效率队交流电阻的要求以及变压器体积的限制，对初级线圈4的宽度和厚度做进一步调整。
次级线圈5，与初级线圈4类似。根据实际电路的需要设计匝数，本根据效率队交流电阻的要求以及变压器体积的限制，对初级线圈4的宽度和厚度做进一步调整。
第二介质7，为非导磁介质，用于增加磁芯中柱3在垂直方向的磁阻，从而降低磁芯中柱在垂直方向的漏磁。
至此，已经结合附图对本公开实施例进行了详细描述。需要说明的是，在附图或说明书正文中，未绘示或描述的实现方式，均为所属技术领域中普通技术人员所知的形式，并未进行详细说明。此外，上述对各元件和方法的定义并不仅限于实施例中提到的各种具体结构、形状或方式，本领域普通技术人员可对其进行简单地更改或替换。
依据以上描述，本领域技术人员应当对本公开LTCC高压变压器有了清楚的认识。
综上所述，本公开提供一种LTCC变压器，可用于替代目前高可靠高压应用场合(如高压点火装置、原子钟离子泵电源、真空电子器件电源等)中的高压变压器，大幅提高***的可靠性，减小体积并降低成本，是一种很有前途的技术，具有十分广阔的的应用前景，对装备小型化具有重要意义。
还需要说明的是，实施例中提到的方向用语，例如“上”、“下”、“前”、“后”、“左”、“右”等，仅是参考附图的方向，并非用来限制本公开的保护范围。贯穿附图，相同的元素由相同或相近的附图标记来表示。在可能导致对本公开的理解造成混淆时，将省略常规结构或构造。
并且图中各部件的形状和尺寸不反映真实大小和比例，而仅示意本公开实施例的内容。另外，在权利要求中，不应将位于括号之间的任何参考符号构造成对权利要求的限制。
类似地，应当理解，为了精简本公开并帮助理解各个公开方面中的一个或多个，在上面对本公开的示例性实施例的描述中，本公开的各个特征有时被一起分组到单个实施例、图、或者对其的描述中。然而，并不应将该公开的方法解释成反映如下意图：即所要求保护的本公开要求比在每个权利要求中所明确记载的特征更多的特征。更确切地说，如下面的权利要求书所反映的那样，公开方面在于少于前面公开的单个实施例的所有特征。因此，遵循具体实施方式的权利要求书由此明确地并入该具体实施方式，其中每个权利要求本身都作为本公开的单独实施例。
以上所述的具体实施例，对本公开的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本公开的具体实施例而已，并不用于限制本公开，凡在本公开的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (7)

  1. 一种LTCC高压变压器，其中，自上而下顺次包括：上边柱、磁芯中柱和下边柱；还包括：
    初级线圈和次级线圈，烧制于所述磁芯中柱中；
    多个第一介质，沿纵向均匀分布在所述磁芯中柱上；
    多个第二介质，分别设置在相邻两匝初级线圈、两匝次级线圈或初级线圈和次级线圈间。
  2. 根据权利要求1所述的LTCC高压变压器，其中，还包括：
    多个连接孔，分别设置于所述第一介质上。
  3. 根据权利要求1所述的LTCC高压变压器，其中，所述上边柱的材料为高磁导率材料，所述高磁导率材料的磁导率为不小于400。
  4. 根据权利要求1所述的LTCC高压变压器，其中，所述下边柱的材料为高磁导率材料，所述高磁导率材料的磁导率为不小于400。
  5. 根据权利要求1所述的LTCC高压变压器，其中，所述磁芯中柱的材料为低磁导率材料，所述低磁导率材料的磁导率为不大于100。
  6. 根据权利要求1所述的LTCC高压变压器，其中，所述上边柱和所述下边柱的相对磁导率大于所述磁芯中柱的相对磁导率。
  7. 根据权利要求1所述的LTCC高压变压器，其中，相邻所述初级线圈间通过多个所述第二介质填充。
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