WO2016086873A1 - Coaxial structure high efficiency ultrahigh frequency electronic transformer - Google Patents
Coaxial structure high efficiency ultrahigh frequency electronic transformer Download PDFInfo
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- WO2016086873A1 WO2016086873A1 PCT/CN2015/096286 CN2015096286W WO2016086873A1 WO 2016086873 A1 WO2016086873 A1 WO 2016086873A1 CN 2015096286 W CN2015096286 W CN 2015096286W WO 2016086873 A1 WO2016086873 A1 WO 2016086873A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
- H01F19/08—Transformers having magnetic bias, e.g. for handling pulses
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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
Definitions
- the invention relates to high frequency electronic transformer technology.
- it relates to a high-performance ultra-high frequency electronic transformer with a coaxial structure.
- the power capacity of the high-frequency electronic transformer is proportional to the volume of the transformer. Under the condition of a certain volume, it is only possible to increase the power capacity of the transformer by increasing the operating frequency of the conversion power supply. The increase of the frequency will enhance the skin effect and the proximity effect of the wire, and at the same time, the loss of the core will also increase. For the conventional transformer, the frequency increase is limited;
- the transmission efficiency of high-frequency electronic transformers limits its power density.
- the conversion efficiency of traditional high-power electronic transformers is difficult to break through 90%, which not only causes energy waste, increases manufacturing costs, but also restricts a reduction in volume;
- the energy transmission of the high-frequency electronic transformer is carried out by coupling the composite magnetic flux of the primary winding to the secondary winding, and this magnetic flux also generates electromagnetic interference for energy transmission.
- the magnetic flux and the magnetic flux that generates electromagnetic interference are the same magnetic flux, and the greater the transmitted power, the stronger the electromagnetic interference generated;
- the switching power supply transformer transmits the steep pulse signals at the front and rear.
- the high-frequency harmonics are very rich.
- the stray electromagnetic radiation generated while transmitting the effective energy will cause strong electromagnetic interference, and with the addition of power. Large disturbances are geometrically enhanced.
- the winding of the transformer is composed of a number of turns of wire. When the winding is energized, a magnetic field is generated around each wire. The strength of the magnetic field is proportional to the current, and the direction of the magnetic flux follows the right-hand rule.
- the windings of the traditional high-frequency electronic transformer are bundled, and the magnetic fluxes 1-2 generated by a single wire are combined with each other to form a composite magnetic flux 1-3, and the conventional bundle-wound primary winding turns the composite magnetic flux 1-2 to cancel each other.
- the external synthetic flux 1-3 transmits energy to the secondary winding through the coupling of the magnetic core; the externally synthesized magnetic flux 1-3 of the primary winding that transmits energy also generates electromagnetic interference while transmitting energy, namely: The transmitted energy is the same magnetic flux as the electromagnetic interference.
- the fundamental reason for the low efficiency and large interference of the traditional transformer is that the magnetic flux for energy transmission between the primary and secondary is the same magnetic flux as the electromagnetic flux for generating electromagnetic interference; Wires around the periphery of a small number of windings participate in the synthesis of this flux, and the flux of the inner wires of most of the windings cancel each other out and do not participate in energy transfer at all. Therefore, the energy transmission efficiency of the transformer is low, the power density cannot be improved, and more seriously, as the power of the transformer increases, the accompanying electromagnetic interference also increases.
- the key to the invention is to redistribute the relative positions of the primary and secondary windings and to control the direction of the current in each of the primary windings, subverting the resultant magnetic flux of the conventional transformer through the primary winding.
- the mode of transferring energy to the secondary winding uses the inter-turn magnetic flux of the primary winding to transfer energy to the secondary winding—that is, the transmission of the primary and secondary winding energy is performed between the magnetic flux inside the winding, and electromagnetic interference occurs.
- the external synthetic magnetic flux does not participate in energy transmission at all, and the two magnetic fluxes of energy transmission and electromagnetic interference are completely stripped, which effectively weakens and suppresses electromagnetic interference while effectively improving the transmission efficiency and power density of the transformer.
- the high-frequency electronic transformer can be fabricated by using a coaxial structure.
- the inner conductor 3-1 of the coaxial wire is the primary winding of the transformer, and the outer conductor 3-2 is the secondary winding of the transformer, and the wires are distributed in parallel; the wiring of the primary winding is controlled, so that The current inversion of adjacent wires can ensure that the internal synthetic flux 3-4 between each wire is mutually enhanced, and the external flux cancels each other; since the secondary winding is coaxially distributed outside the primary winding and strongly coupled to the primary winding, the wire is utilized.
- the internal synthetic flux 3-4 transmits energy, and the external flux is independent of energy transfer and cancels each other out.
- the shielding layer 4-1 between the layers of the winding assembly can more effectively suppress the electromagnetic interference that has been greatly weakened;
- the shielding layer is designed with an insulating slit 4-2 to prevent the formation of a closed eddy current;
- the shielding layer is designed with electrical connection terminals, actually When applied, it should be grounded or suspended according to the specific conditions.
- Figure 1 Schematic diagram of the structure and flux distribution of the primary winding of a conventional transformer
- Figure 2 Schematic diagram of the magnetic flux distribution of the inverting winding of the interlayer current
- Figure 3 Schematic diagram of the magnetic flux distribution of the inverting current of the turn-to-turn current
- Figure 4 Schematic diagram of magnetic flux distribution with coaxial structure and reversed current between primary windings
- Figure 5 Schematic diagram of high-frequency electronic transformer with primary and secondary windings as coaxial structure
- Figure 6 Schematic diagram of the radial section of a high-power high-frequency electronic transformer with a shielded coaxial structure
- the ultra-low EMI high-power high-frequency electronic transformer with the primary and secondary windings is a coaxial structure and the primary winding turns off the current.
- the high-power high-frequency electronic transformer is made of coaxial wire, and its structure is cylindrical.
- the radial section of the coaxial wire is circular, and the shielding layer is embedded in the layers of the winding.
- the shielding layer is opened in the axial direction. The gap prevents the induced current of the shielding layer from forming a circulating current, and the shielding layer has a wire at one end and is grounded when supplied.
- the core wire of the coaxial wire is used as the primary winding of the transformer, and the outer conductor of the coaxial wire is used as the secondary winding of the transformer, and the appropriate wiring is adopted to ensure the reverse current of the adjacent wires in the primary winding, so that the primary winding can be fully utilized.
- the mutually enhanced performance of the turn-to-turn flux maximizes the efficiency of energy transfer between the primary and secondary windings.
- the inter-turn magnetic flux inside the primary winding is mutually enhanced, and the external synthetic magnetic flux in the radial direction of the cylinder cancels each other to almost zero, and the function of the shielding layer ensures that the stray radiation is almost zero, and the electromagnetic interference can be minimized.
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Abstract
A coaxial structure high efficiency ultrahigh frequency electronic transformer, for relocating the relative positions of a primary winding (3-1) and a secondary winding (3-2) and controlling the current direction in each turn of the conductive wire within the primary winding (3-1), completely changing the mode that the conventional transformer transmits energy to the secondary winding through the external magnetic flux formed by the primary winding. The electronic transformer uses inter-turn magnetic flux of the primary winding (3-1) to transmit energy to the secondary winding (3-2); namely, the energy transmission of the primary and secondary windings is conducted between magnetic fluxes within the winding, and the externally formed magnetic flux generating electromagnetic interference does not participate in energy transmission at all, completely separating the two magnetic fluxes of energy transmission and electromagnetic interference, thus effectively enhancing transformer transmission efficiency and power density while dramatically reducing and inhibiting electromagnetic interference.
Description
本发明涉及高频电子变压器技术。尤其涉及同轴结构高效能超高频电子变压器。The invention relates to high frequency electronic transformer technology. In particular, it relates to a high-performance ultra-high frequency electronic transformer with a coaxial structure.
随着电源技术的不断进步，采用开关技术的二次电源的应用几乎渗透了各个领域，开关电源的核心器件之一是高频电子变压器，而高频电子变压器的技术瓶颈限制了开关电源的进步，可以毫不夸张的说——高频电子变压器的性能决定了开关电源的总体性能。到目前为止，传统的高频电子变压器已经难以满足高效能、大功率转换电源的需要。其关键的技术瓶颈在于：With the continuous advancement of power supply technology, the application of secondary power supply using switching technology has almost penetrated various fields. One of the core components of switching power supply is high frequency electronic transformer, and the technical bottleneck of high frequency electronic transformer limits the progress of switching power supply. It is no exaggeration to say that the performance of high-frequency electronic transformers determines the overall performance of the switching power supply. So far, traditional high-frequency electronic transformers have been difficult to meet the needs of high-performance, high-power conversion power supplies. The key technical bottlenecks are:
1、高频电子变压器的功率容量与变压器的体积成正比，在体积一定的条件下，想要加大变压器的功率容量，只能通过提升转换电源的工作频率来实现。而频率的提高会增强导线的趋肤效应和临近效应，同时，磁芯的损失也会随之加大，对于传统变压器来说，频率的提升是有局限性的；1. The power capacity of the high-frequency electronic transformer is proportional to the volume of the transformer. Under the condition of a certain volume, it is only possible to increase the power capacity of the transformer by increasing the operating frequency of the conversion power supply. The increase of the frequency will enhance the skin effect and the proximity effect of the wire, and at the same time, the loss of the core will also increase. For the conventional transformer, the frequency increase is limited;
2、高频电子变压器的传输效率限制了它的功率密度，传统的大功率高频电子变压器的转换效率很难突破90％，这样一来不仅造成了能源浪费，增加了制造成本，而且也制约了体积的减小；2. The transmission efficiency of high-frequency electronic transformers limits its power density. The conversion efficiency of traditional high-power electronic transformers is difficult to break through 90%, which not only causes energy waste, increases manufacturing costs, but also restricts a reduction in volume;
3、高频电子变压器的能量传输是通过初级绕组的合成磁通耦合到次级绕组来进行的，而这个磁通同时也会产生电磁干扰，进行能量传输的
磁通与产生电磁干扰的磁通是同一个磁通，传输的功率越大产生的电磁干扰也就越强；3. The energy transmission of the high-frequency electronic transformer is carried out by coupling the composite magnetic flux of the primary winding to the secondary winding, and this magnetic flux also generates electromagnetic interference for energy transmission.
The magnetic flux and the magnetic flux that generates electromagnetic interference are the same magnetic flux, and the greater the transmitted power, the stronger the electromagnetic interference generated;
4、开关电源变压器传输的是前后沿陡峭的脉冲信号，其高频谐波非常丰富，在传输有效能量的同时所产生的杂散电磁辐射会造成很强的电磁干扰，而且随着功率的加大干扰呈几何级数增强。4. The switching power supply transformer transmits the steep pulse signals at the front and rear. The high-frequency harmonics are very rich. The stray electromagnetic radiation generated while transmitting the effective energy will cause strong electromagnetic interference, and with the addition of power. Large disturbances are geometrically enhanced.
发明内容Summary of the invention
变压器的绕组是由若干匝导线组成，绕组通电时每一条导线的周围都会产生磁场，磁场的强度与电流成正比，磁通的方向遵循右拳定则。The winding of the transformer is composed of a number of turns of wire. When the winding is energized, a magnetic field is generated around each wire. The strength of the magnetic field is proportional to the current, and the direction of the magnetic flux follows the right-hand rule.
传统高频电子变压器的绕组采用集束式绕制，单条导线产生的磁通1-2相互合成后形成合成磁通1-3，传统集束绕制的初级绕组匝间合成磁通1-2相互抵消不参与能量传输，外部合成磁通1-3通过磁芯的耦合向次级绕组传输能量；传输能量的初级绕组外部合成磁通1-3在传输能量的同时，也会产生电磁干扰，即：传输能量与产生电磁干扰是同一个磁通。The windings of the traditional high-frequency electronic transformer are bundled, and the magnetic fluxes 1-2 generated by a single wire are combined with each other to form a composite magnetic flux 1-3, and the conventional bundle-wound primary winding turns the composite magnetic flux 1-2 to cancel each other. Without participating in energy transfer, the external synthetic flux 1-3 transmits energy to the secondary winding through the coupling of the magnetic core; the externally synthesized magnetic flux 1-3 of the primary winding that transmits energy also generates electromagnetic interference while transmitting energy, namely: The transmitted energy is the same magnetic flux as the electromagnetic interference.
通过简单的分析可以看出，传统变压器效率低、干扰大的根本原因在于：初次级间进行能量传输的磁通与产生电磁干扰的磁通是同一个磁通；且仅有占初级线圈总匝数比例很少的绕组***的导线参与这一磁通的合成，而绝大多数的绕组内部导线的磁通相互抵消根本不参与能量传输。因此变压器的能量传输效率低下，功率密度无法提高，更严重的是随着变压器功率的加大，伴之而来的电磁干扰也随之加大。It can be seen from the simple analysis that the fundamental reason for the low efficiency and large interference of the traditional transformer is that the magnetic flux for energy transmission between the primary and secondary is the same magnetic flux as the electromagnetic flux for generating electromagnetic interference; Wires around the periphery of a small number of windings participate in the synthesis of this flux, and the flux of the inner wires of most of the windings cancel each other out and do not participate in energy transfer at all. Therefore, the energy transmission efficiency of the transformer is low, the power density cannot be improved, and more seriously, as the power of the transformer increases, the accompanying electromagnetic interference also increases.
本发明的关键在于：重新分布初级绕组和次级绕组的相对位置，并控制初级绕组内每一匝导线电流的方向，颠覆了传统变压器通过初级绕组的合成磁通
向次级绕组传输能量的模式，利用初级绕组的匝间磁通向次级绕组传输能量——即初、次级绕组能量的传输是在绕组内部的磁通间进行的，而产生电磁干扰的外部合成磁通完全不参与能量传输，实现了能量传输与电磁干扰两个磁通完全剥离，在有效提升变压器传输效率和功率密度的同时，从根本上削弱和抑制电磁干扰。The key to the invention is to redistribute the relative positions of the primary and secondary windings and to control the direction of the current in each of the primary windings, subverting the resultant magnetic flux of the conventional transformer through the primary winding.
The mode of transferring energy to the secondary winding uses the inter-turn magnetic flux of the primary winding to transfer energy to the secondary winding—that is, the transmission of the primary and secondary winding energy is performed between the magnetic flux inside the winding, and electromagnetic interference occurs. The external synthetic magnetic flux does not participate in energy transmission at all, and the two magnetic fluxes of energy transmission and electromagnetic interference are completely stripped, which effectively weakens and suppresses electromagnetic interference while effectively improving the transmission efficiency and power density of the transformer.
可以采用同轴结构制作高频电子变压器，同轴导线的内导体3-1为变压器的初级绕组，外导体3-2为变压器的次级绕组，导线间平行分布；控制初级绕组的接线，使得相邻导线的电流反相，就可以保证每匝导线间内部合成磁通3-4相互增强，外部磁通相互抵消；由于次级绕组同轴分布在初级绕组外面与初级绕组强耦合，利用导线的内部合成磁通3-4传输能量，外部磁通与能量传输无关且相互抵消。在绕组总成的层间嵌入屏蔽层4-1可以更有效地抑制已经大幅削弱了的电磁干扰；屏蔽层设计有绝缘缝隙4-2，防止产生闭合涡流；屏蔽层设计有电气连接端子，实际应用时根据具体情况接地或悬空。The high-frequency electronic transformer can be fabricated by using a coaxial structure. The inner conductor 3-1 of the coaxial wire is the primary winding of the transformer, and the outer conductor 3-2 is the secondary winding of the transformer, and the wires are distributed in parallel; the wiring of the primary winding is controlled, so that The current inversion of adjacent wires can ensure that the internal synthetic flux 3-4 between each wire is mutually enhanced, and the external flux cancels each other; since the secondary winding is coaxially distributed outside the primary winding and strongly coupled to the primary winding, the wire is utilized. The internal synthetic flux 3-4 transmits energy, and the external flux is independent of energy transfer and cancels each other out. Embedding the shielding layer 4-1 between the layers of the winding assembly can more effectively suppress the electromagnetic interference that has been greatly weakened; the shielding layer is designed with an insulating slit 4-2 to prevent the formation of a closed eddy current; the shielding layer is designed with electrical connection terminals, actually When applied, it should be grounded or suspended according to the specific conditions.
图1：传统变压器初级绕组结构及磁通分布示意图Figure 1: Schematic diagram of the structure and flux distribution of the primary winding of a conventional transformer
1-1——初级导线；1-1 - primary wire;
1-2——单匝导线磁通；1-2 - single turn wire flux;
1-3——绕组合成磁通。1-3 - Winding synthetic flux.
图2：层间电流反相绕组的磁通分布示意图
Figure 2: Schematic diagram of the magnetic flux distribution of the inverting winding of the interlayer current
1-1——初级导线；1-1 - primary wire;
1-2——单匝导线磁通；1-2 - single turn wire flux;
1-3——绕组合成磁通；1-3 - winding synthetic flux;
1-4——层间合成磁通。1-4 - interlayer synthetic flux.
图3：匝间电流反相绕组的磁通分布示意图Figure 3: Schematic diagram of the magnetic flux distribution of the inverting current of the turn-to-turn current
2-1——单匝导线；2-1 - single turn wire;
2-2——单匝导线磁通；2-2—— single turn wire flux;
2-3——导线间合成磁通。2-3 - Synthetic flux between wires.
图4：采用同轴结构且初级绕组匝间电流反相的磁通分布示意图Figure 4: Schematic diagram of magnetic flux distribution with coaxial structure and reversed current between primary windings
3-1——同轴导线内导体(初级绕组)；3-1 - coaxial conductor inner conductor (primary winding);
3-2——同轴导线外导体(次级绕组)；3-2—— coaxial conductor outer conductor (secondary winding);
3-3——单匝导线磁通；3-3—— single turn wire flux;
3-4——导线间合成磁通。3-4 - Synthetic flux between wires.
图5：初次级绕组为同轴结构的高频电子变压器结构示意图Figure 5: Schematic diagram of high-frequency electronic transformer with primary and secondary windings as coaxial structure
3-1——同轴导线内导体(初级绕组)；3-1 - coaxial conductor inner conductor (primary winding);
3-2——同轴导线外导体(次级绕组)。3-2 - Coaxial conductor outer conductor (secondary winding).
图6：带屏蔽层的同轴结构大功率高频电子变压器径向截面示意图
Figure 6: Schematic diagram of the radial section of a high-power high-frequency electronic transformer with a shielded coaxial structure
3-1——同轴导线内导体(初级绕组)；3-1 - coaxial conductor inner conductor (primary winding);
3-2——同轴导线外导体(次级绕组)；3-2—— coaxial conductor outer conductor (secondary winding);
3-3——单匝导线磁通；3-3—— single turn wire flux;
3-4——导线间合成磁通；3-4 - synthetic magnetic flux between wires;
4-1——层间屏蔽层；4-1 - interlayer shielding layer;
4-2——屏蔽层绝缘缝隙。4-2——Shield insulation gap.
初次级绕组为同轴结构且初级绕组匝间电流反相的超低EMI大功率高频电子变压器。The ultra-low EMI high-power high-frequency electronic transformer with the primary and secondary windings is a coaxial structure and the primary winding turns off the current.
采用同轴导线制作大功率高频电子变压器，其结构为圆柱状——同轴导线分布的径向截面是圆形，且绕组的层间内嵌屏蔽层，屏蔽层沿轴向开有贯通的缝隙，防止屏蔽层的感应电流形成环流，屏蔽层单端有导线接出，供应用时接地使用。The high-power high-frequency electronic transformer is made of coaxial wire, and its structure is cylindrical. The radial section of the coaxial wire is circular, and the shielding layer is embedded in the layers of the winding. The shielding layer is opened in the axial direction. The gap prevents the induced current of the shielding layer from forming a circulating current, and the shielding layer has a wire at one end and is grounded when supplied.
利用同轴导线的芯线作为变压器的初级绕组，将同轴导线的外导体作为变压器的次级绕组，采取合适的接线方式，保证初级绕组中相邻导线电流反相，就可以充分利用初级绕组的匝间磁通相互增强的性能最大限度地提高初次级绕组间能量传输的效率。The core wire of the coaxial wire is used as the primary winding of the transformer, and the outer conductor of the coaxial wire is used as the secondary winding of the transformer, and the appropriate wiring is adopted to ensure the reverse current of the adjacent wires in the primary winding, so that the primary winding can be fully utilized. The mutually enhanced performance of the turn-to-turn flux maximizes the efficiency of energy transfer between the primary and secondary windings.
此时初级绕组内部的匝间磁通相互增强，在圆柱径向的外部合成磁通相互抵消几乎为零，再加之屏蔽层的作用保证其杂散辐射几乎为零，电磁干扰因此可以降到最低。
At this time, the inter-turn magnetic flux inside the primary winding is mutually enhanced, and the external synthetic magnetic flux in the radial direction of the cylinder cancels each other to almost zero, and the function of the shielding layer ensures that the stray radiation is almost zero, and the electromagnetic interference can be minimized. .
Claims (6)
- 同轴结构高效能超高频电子变压器，其特征是：根据安培定律及有关电磁学原理，合理分布电子变压器的初次级绕组及设定初级绕组中电流的流动方向，使得电子变压器初级绕组内部的匝间合成磁通相互增强，而外部合成磁通相互抵消，将传统变压器通过初级绕组的合成磁通向次级绕组进行能量传输的模式，更改为利用初级绕组的内部磁通向次级绕组传输能量，在有效提升变压器传输效率和功率密度的同时，大幅降低变压器因外部合成磁通而产生的电磁干扰，适当内嵌屏蔽层可以更加有效地降低残留的外部合成磁通产生的电磁辐射。Coaxial structure high-efficiency ultra-high frequency electronic transformer, characterized by: according to Ampere's law and related electromagnetic principles, reasonably distribute the primary and secondary windings of the electronic transformer and set the flow direction of the current in the primary winding, so that the internal winding of the electronic transformer The inter-turn synthetic magnetic fluxes are mutually enhanced, and the external synthetic magnetic fluxes cancel each other out, and the mode of transferring the energy of the conventional transformer through the synthetic magnetic flux of the primary winding to the secondary winding is changed to use the internal magnetic flux of the primary winding to transmit to the secondary winding. The energy, while effectively improving the transmission efficiency and power density of the transformer, greatly reduces the electromagnetic interference generated by the external synthetic magnetic flux of the transformer, and the appropriate embedded shielding layer can more effectively reduce the electromagnetic radiation generated by the residual external synthetic magnetic flux.
- 按照权利要求1所述的合理分布电子变压器的初次级绕组，采用同轴导线制作初次级绕组，其特征是：初次级绕组的导线为同轴结构，同轴导线的内导体为初级绕组，外导体为次级绕组，变压器绕组的分布呈3D立体结构。The primary and secondary windings of the rationally distributed electronic transformer according to claim 1, wherein the primary and secondary windings are formed by coaxial wires, wherein the primary and secondary winding wires are coaxial structures, and the inner conductors of the coaxial wires are primary windings, The conductor is a secondary winding, and the distribution of the transformer winding is a 3D three-dimensional structure.
- 按照权利要求1所述的设定初级绕组中电流的流动方向具有显著特点，其特征是：同轴导线结构的变压器，相邻的同轴导线内导体(初级绕组)电流反相。The flow direction of the current in the primary winding is set according to claim 1, and is characterized in that: the transformer of the coaxial conductor structure, the current of the adjacent coaxial conductor inner conductor (primary winding) is reversed.
- 按照权利要求1所述的同轴电子变压器初级绕组内部的匝间合成磁通相互增强，而外部合成磁通相互抵消，其特征是：匝间耦合的同轴结构变压器由于相邻导线的电流反相，其匝间合成磁通是相互增强的，而外部的合成磁通相互抵消，与初级导线同轴分布的次级导线充分利用了初级绕组匝间相互增强的磁通，提高了能量传输效率，加大了功率密度。The inter-turn synthetic magnetic flux inside the primary winding of the coaxial electronic transformer according to claim 1 is mutually enhanced, and the external synthetic magnetic flux cancels each other, and the characteristic is that the coaxial-coupled coaxial structure transformer is reversed by the current of the adjacent wires. Phase, the inter-turn synthetic magnetic flux is mutually enhanced, and the external synthetic magnetic flux cancels each other, and the secondary conductor coaxially distributed with the primary conductor makes full use of the mutually enhanced magnetic flux between the primary winding turns, improving energy transmission efficiency. Increased power density.
- 按照权利要求1所述的同轴电子变压器内传输能量的磁通与产生电磁干扰的磁通完全剥离，其特征是：同轴结构电子变压器的能量传输是在初、次级绕 组的单匝导线之间进行的，而产生电磁干扰的外部合成磁通因相互抵消而被大幅削减，而这部分磁通根本不参与能量转换，所以在同轴结构的电子变压器中，传输能量的磁通与产生电磁干扰的磁通被彻底剥离开来。The magnetic flux for transmitting energy in the coaxial electronic transformer according to claim 1 is completely stripped from the magnetic flux for generating electromagnetic interference, wherein the energy transmission of the coaxial structure electronic transformer is in the primary and secondary windings. The external synthetic magnetic flux that is generated between the single-turn wires of the group and the electromagnetic interference is greatly reduced by canceling each other, and this part of the magnetic flux does not participate in the energy conversion at all, so in the electronic transformer of the coaxial structure, the energy is transmitted. The magnetic flux and the magnetic flux that generates electromagnetic interference are completely separated.
- 按照权利要求1所述的适当内嵌屏蔽层可以更加有效地降低残留的外部合成磁通产生的电磁辐射，其特征是：层间耦合的平面变压器在其最顶层和最底层嵌入电磁屏蔽层，且在屏蔽层上开有绝缘缝隙，防止屏蔽层的感应电流形成环流，屏蔽层单端有导线接出，可供接地使用；匝间耦合的同轴导线变压器为达到最低电磁辐射效果，通常采用圆柱状结构，初级绕组可以由内向外多层分布，此时每一层的匝数应为偶数才可以保证相邻导线的电流反相，为使电磁干扰降至最低，可以在同心圆的层间嵌入屏蔽层。屏蔽层沿轴向开有贯通的缝隙，防止屏蔽层的感应电流形成环流，屏蔽层单端有导线接出，可供接地使用。 The appropriate in-line shielding layer according to claim 1 can more effectively reduce the electromagnetic radiation generated by the residual external synthetic magnetic flux, characterized in that the plane-coupled planar transformer is embedded in the electromagnetic shielding layer at the topmost and bottommost layers thereof. The insulating layer is formed on the shielding layer to prevent the induced current of the shielding layer from forming a circulating current, and the shielding layer has a single-ended wire to be grounded for grounding; the coaxial-conducting coaxial wire transformer is used to achieve the lowest electromagnetic radiation effect, usually adopted Cylindrical structure, the primary winding can be distributed from inner to outer layers. At this time, the number of turns of each layer should be even to ensure the current inversion of adjacent wires. In order to minimize electromagnetic interference, it can be in the layer of concentric circles. Embed the shield between. The shielding layer has a through gap in the axial direction to prevent the induced current of the shielding layer from forming a circulating current, and the shielding layer has a single-ended wire to be grounded for grounding.
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| CN104064322A (en) * | 2013-03-22 | 2014-09-24 | 王勇 | Novel high-effect and high-frequency impulse transformer with low stray electromagnetic radiation |
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| CN104064322A (en) * | 2013-03-22 | 2014-09-24 | 王勇 | Novel high-effect and high-frequency impulse transformer with low stray electromagnetic radiation |
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