WO2015024376A1 - 一种电压变换器和共模噪声阻抗调整方法 - Google Patents
一种电压变换器和共模噪声阻抗调整方法 Download PDFInfo
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- WO2015024376A1 WO2015024376A1 PCT/CN2014/073240 CN2014073240W WO2015024376A1 WO 2015024376 A1 WO2015024376 A1 WO 2015024376A1 CN 2014073240 W CN2014073240 W CN 2014073240W WO 2015024376 A1 WO2015024376 A1 WO 2015024376A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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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
- H01F27/02—Casings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from AC input or output
- H02M1/126—Arrangements for reducing harmonics from AC input or output using passive filters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from AC input or output
- H02M1/123—Suppression of common mode voltage or current
Definitions
- a voltage converter and a common mode noise impedance adjustment method are submitted to the Chinese Patent Office on August 21, 2013, and the application number is 201310367732.
- the invention name is "a voltage converter and a common mode noise impedance adjustment method"
- the priority of the Chinese Patent Application the entire contents of which is incorporated herein by reference.
- TECHNICAL FIELD The present invention relates to the field of circuits, and in particular, to a voltage converter and a common mode noise impedance adjustment method.
- EMI Electromagnetic Interference
- the designer In order for the filter to minimize noise, the designer must choose the most appropriate EMI filter based on the impedance mismatch principle.
- the noise source impedance, load impedance, and input and output impedance of the EMI filter are key factors in aligning the performance of the EMI filter based on the impedance mismatch principle.
- the current common practice in the industry is to select the corresponding type of EMI filter according to the high resistance or low resistance of the noise source and the load impedance.
- the designer can only select Many different filters are used for comparison, that is, from the filter point of view, the impedance characteristics of the EMI filter are adjusted, and the EMI filter that is most suitable for the system is finally selected.
- the prior art designs the EMI filter according to the principle of impedance mismatch, adjusts the impedance of the filter so that the noise source impedance and the EMI filter input impedance, the EMI filter output impedance and the load impedance reach the maximum mismatch, but the noise source impedance It is currently impossible to accurately describe it, and the cost and time waste in the comparison test of the EMI filter for the system makes such design unreasonable and inefficient, in order to save time and cost.
- the choice of the EMI filter has been designed to leave a large margin when it comes to EMI filters, so that the volume of the EMI filter becomes very large.
- Embodiments of the present invention provide a voltage converter and a common mode noise impedance adjustment method, which can achieve a mismatch state between a common mode impedance value of a noise source and an impedance value of an EMI filter, thereby reducing the design of the EMI filter.
- Limitations make the EMI filter smaller and more efficient to use.
- the embodiment of the present invention adopts the following technical solutions:
- a voltage converter including:
- the common mode impedance adjuster comprising: an EE core, a first coil, a second coil, a balanced winding coil, and a variable resistor, the EE core including a first magnetic a column, a second magnetic column and a center column, wherein the first magnetic coil and the second magnetic coil are respectively wound on the first magnetic column and the second magnetic column, and are wound from the first magnetic column
- the first coil of the inductor leads out the first terminal and the second terminal, and the second coil and the fourth terminal are drawn from the second coil of the inductor wound on the second magnetic column, wherein the second wiring
- the distance from the balance winding is smaller than the distance of the first terminal from the balance winding, and the distance of the fourth terminal from the balance winding is smaller than the distance of the third terminal from the balance winding ;
- the balanced winding coil is wound in an "8" shape on the first magnetic column and the second magnetic post of the EE magnetic core and does not pass through the center pillar of the EE magnetic core, the balanced winding One end of the coil is connected to the slidable pin of the variable resistor, and the other end of the balanced winding coil is connected to any one of the two non-slidable pins of the variable resistor;
- the electromagnetic interference filter is connected to the common mode impedance adjuster through the second terminal and the fourth terminal, and a noise source is connected from the first terminal and the third terminal to The common mode impedance adjuster.
- An air gap is formed in a center pillar of the E-E core or a center pillar of the E-E core is disconnected;
- the side leg of the E-E core has an air gap or the center column of the E-E core is broken.
- variable resistor in combination with the first aspect or the first possible implementation of the first aspect, includes a sliding varistor, a variable resistance box, and a potentiometer.
- the central magnetic column is located in the first magnetic column and the second magnetic column between.
- the second aspect provides a common mode noise impedance adjustment method, which is applied to the voltage converter in any one of the first to third possible implementations of the first aspect or the first aspect, the method comprising:
- the impedance value of the variable resistor on the balanced winding coil is adjusted to make the noise impedance of the common mode current and the impedance of the electromagnetic interference filter The mismatch status is reached:
- Embodiments of the present invention provide a voltage converter and a common mode noise impedance adjustment method for adjusting a common mode noise source impedance value by adjusting a balanced impedance value in a balanced winding on a voltage converter to make a common mode noise source
- the impedance value and the impedance value of the EMI filter are mismatched, thereby reducing the limitation on the EMI filter design, making the EMI filter smaller and more efficient to use.
- FIG. 1 is a schematic structural diagram 1 of a voltage converter according to an embodiment of the present invention.
- FIG. 2 is a schematic structural diagram 2 of a voltage converter according to an embodiment of the present invention.
- FIG. 3 is a schematic structural diagram 1 of a common mode impedance adjuster according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram 2 of a common mode impedance adjuster according to an embodiment of the present invention.
- FIG. 5 is an equivalent schematic diagram 1 of a common mode impedance adjuster according to an embodiment of the present invention.
- FIG. 6 is an equivalent schematic diagram 2 of a common mode impedance adjuster according to an embodiment of the present invention.
- FIG. 7 is an equivalent schematic diagram 3 of a common mode impedance adjuster according to an embodiment of the present invention.
- FIG. 8 is a schematic flowchart diagram of a common mode noise impedance adjustment method according to an embodiment of the present invention.
- the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.
- the traditional EMI filtering system consists of a noise source, an EMI (Electro-Magnetic Interference) filter, and a LISN (Line Impedance Stabilization Network).
- the impedance of the noise source is Z n
- the input equivalent impedance of the EMI filter is Z in
- the equivalent impedance of LISN is
- the noise signal from the noise source is hardly transmitted to the LISN side.
- Embodiments of the present invention are used to adjust the impedance of a noise source such that the impedance of the noise source and the input equivalent impedance of the EMI filter reach a mismatched state.
- the embodiment of the present invention provides a voltage converter 00.
- the voltage converter can be used in the field of DC to DC, DC to AC, AC to AC, and AC to DC voltage converters.
- the common mode impedance adjuster 01 and the EMI filter 02 and the noise source 03 L denotes a live line, and N denotes a neutral line, wherein one end of the common mode impedance adjuster 01 is connected to a noise source, and the other end and the EMI filter 02
- the voltage converter 00 can also be connected to the linear impedance stabilization network 04, and the linear impedance stabilization network 04 is used to make the voltage converter 00 at the factory.
- the common mode impedance adjuster 01 includes: an E-E core 01 1 , a first coil 012 and a second coil 013, a balanced winding coil 014, and a variable resistor 015;
- the EE core 01 1 includes a first magnetic column 01 1 1 , a second magnetic column 01 12 and a central column 01 13 .
- the central column 01 13 may have an air gap or an open position at an intermediate position.
- the first magnetic column 01 1 1 and the second magnetic column 01 12 may have an air gap or an open position at an intermediate position, and the first magnetic column 01 1 1 and the second magnetic field
- the first coil 012 and the second coil 013 are respectively wound on the column 0112, and the first coil 012 and the second terminal 2 are wound from the first coil 012 wound on the first magnetic column 0111, from the second magnetic
- the second coil 013 wound on the column 0112 leads to the third terminal 3 and the fourth terminal 4, wherein the distance of the second terminal 2 from the balanced winding coil 014 is smaller than the first terminal a distance from the balanced winding coil 014, the distance of the fourth terminal 4 from the balanced winding coil 014 is smaller than the distance of the third terminal 3 from the balanced winding coil 014;
- the first coil 012, the second coil 013, and the balanced winding coil 014 are inductive coils, and current can be coupled from the first coil 012 and the second coil 013 to the balanced winding coil 014 by an inductive action.
- the center pillar 0113 of the EE core 011 may be bypassed in an "8" shape without passing through the center pillar 0113 of the EE core, and two terminals are connected from the balanced winding coil 014.
- variable resistor 015 connected in the winding coil 014 includes a sliding varistor, a variable resistance box, and a potentiometer.
- the voltage source magnetoresistance equivalent diagram of the common mode noise adjuster 01 is as shown in FIG.
- R represents the equivalent magnetic reluctance of the center pillar 0113, and a voltage source representing the equivalent of the first coil 012 and the second coil 013; when the first coil 012 is generated
- the voltage source magnetoresistance equivalent of the common mode noise adjuster 01 can be further reduced to FIG.
- the effect of leakage inductance, for common mode currents, the equivalent total inductance from the 1, 2 or 3, 4 terminals is: renfin ⁇ ⁇ nx ni ⁇ 2n 2
- the common mode noise adjuster 01 has a good effect on the common mode noise impedance of the common mode noise source.
- the common mode noise adjuster 01 can be equivalent to a transformer 02 model, as shown in FIG. 7, wherein the first coil 012 and the second coil 013 can be equivalent to the transformer.
- Primary power of 02 Inductor 021 the balanced winding coil can be equivalent to the secondary side 022 of the transformer 02
- the balanced impedance 023 in the transformer 02 is Z b
- the impedance of the noise source 024 is Z n
- the primary side power inductor 021 and the secondary side inductor 022 are ⁇
- the ratio is N:1; then the impedance value Z b of the balanced impedance 023 is equivalent to the primary side being N 1
- the noise equivalent of the primary side noise source 024 is N 2 , so the impedance of the balanced impedance 023 can be adjusted.
- the value is used to adjust the impedance value of the noise source 024.
- the invention provides a voltage converter, which adjusts the impedance value of the common mode noise source by adjusting the balance impedance value in the balance winding on the voltage converter, and can make the common mode impedance value of the noise source and the impedance value of the EMI filter The mismatch condition is reached, thereby reducing the limitations on the EMI filter design, making the EMI filter smaller and more efficient to use.
- the embodiment of the present invention provides a common mode noise impedance adjustment method, which is applied to the voltage converter 00 provided by the embodiment of the present invention. As shown in FIG. 8, the method includes:
- the S10K receives the common mode current containing noise through the inductors on the two side legs of the voltage converter.
- a common mode current containing noise is received through the second terminal and the fourth terminal of the voltage converter.
- the common mode current is coupled to the balanced winding coil by a first coil and a second coil of the voltage converter.
- the reflection coefficient of the noise source is zero, and the electromagnetic interference filter achieves the optimal filtering effect.
- the invention provides a common mode noise impedance adjustment method, which adjusts the impedance value of the common mode noise source by adjusting the balance impedance value in the balance winding on the voltage converter, and can make the common mode impedance value of the noise source and the EMI filter
- the impedance value reaches the mismatch state, which reduces the limitation on the EMI filter design, making EMI filtering
- the device is smaller and more efficient to use.
- the disclosed methods, apparatus, and systems may be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
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Abstract
一种电压变换器和共模噪声阻抗调整方法,涉及电路领域,能够使得噪声源的共模阻抗值与EMI滤波器的阻抗值达到失匹配状态,从而减小了对EMI滤波器设计的限制,使得EMI滤波器的体积更小,并且使用效率更高。其方法为:通过调整电压变换器上平衡绕组中的平衡阻抗值来对共模噪声源的阻抗值进行调节,使得共模噪声源的阻抗值与EMI滤波器的阻抗值达到失匹配状态。
Description
一种电压变换器和共模噪声阻抗调整方法 本申请要求于 2013年 8月 21 日提交中国专利局、 申请号为 201310367732. X、发明 名称为 "一种电压变换器和共模噪声阻抗调整方法"的中国专利申请的优先权, 其全部 内容通过引用结合在本申请中。 技术领域 本发明涉及电路领域, 尤其涉及一种电压变换器和共模噪声阻抗调整方法。 背景技术 随着开关电源的频率不断提升, EMI (Electromagnetic Interference) 电磁干扰 问题日趋严重。 传统的方法是在系统中加入 EMI滤波器以抑制噪声。 为了使滤波器最大 限度地抑制噪声, 设计者必须根据阻抗失配原则选择最为合适的 EMI滤波器。 噪声源阻 抗、负载端阻抗以及 EMI滤波器的输入输出阻抗是根据阻抗失配原则调配 EMI滤波器性 能的关键因素。
为了解决上述电磁干扰问题, 目前业界的一般做法是根据噪声源和负载阻抗的高阻 或低阻来选择对应类型的 EMI滤波器, 为了最大程度地削弱开关电源中的 EMI, 设计者 只能选择许多不同的滤波器来进行对比, 也就是从滤波器角度出发, 调整 EMI滤波器的 阻抗特性, 最终选出最适合系统的 EMI滤波器。
在实现上述解决电磁干扰问题的过程中, 发明人发现现有技术中至少存在如下问 题:
现有技术根据阻抗失配原理对 EMI滤波器进行设计,调整滤波器的阻抗从而使噪声 源阻抗与 EMI滤波器输入阻抗, EMI滤波器输出阻抗与负载阻抗达到最大失配, 但噪声 源的阻抗目前无法对其进行准确的描述,并且在为系统的 EMI滤波器的选型对比试验中, 所带来的成本和时间上的浪费使得这样的设计不合理并且效率低,若为了节约时间和成 本选择对 EMI滤波器进行过设计,即在涉及 EMI滤波器时留有很大的裕量,这样一来 EMI 滤波器的体积就变的很大。 发明内容
本发明的实施例提供一种电压变换器和共模噪声阻抗调整方法, 能够使得噪声源的 共模阻抗值与 EMI滤波器的阻抗值达到失匹配状态, 从而减小了对 EMI滤波器设计的限 制, 使得 EMI滤波器的体积更小, 并且使用效率更高。 为达到上述目的, 本发明的实施例采用如下技术方案:
第一方面, 提供一种电压变换器, 包括:
共模阻抗调整器和电磁干扰滤波器, 所述共模阻抗调整器包括: E-E磁芯、 第一线 圈、 第二线圈、 平衡绕组线圈以及可变电阻器, 所述 E-E磁芯包括第一磁柱、 第二磁柱 和中心柱,在所述第一磁柱与所述第二磁柱上分别绕制有所述第一线圈以及所述第二线 圈, 从第一磁柱上绕制的所述电感第一线圈引出第一接线端和第二接线端, 从第二磁柱 上绕制的所述电感第二线圈引出第三接线端和第四接线端, 其中, 所述第二接线端距所 述平衡绕组的距离小于所述第一接线端距所述平衡绕组的距离,所述第四接线端距所述 平衡绕组的距离小于所述第三接线端距所述平衡绕组的距离;
所述平衡绕组线圈以 "8"字形绕在所述 E-E磁芯的所述第一磁柱以及所述第二磁柱 上且不经过所述 E-E磁芯的所述中心柱, 所述平衡绕组线圈的一端接在所述可变电阻器 可滑动的管脚上,所述平衡绕组线圈的另一端接在所述可变电阻器的两个不可滑动的管 脚中的任意一个管脚上;
所述电磁干扰滤波器通过所述第二接线端和所述第四接线端与所述共模阻抗调整 器相连接, 噪声源从所述第一接线端和所述第三接线端接入到所述共模阻抗调整器上。
在第一种可能的实现方式中, 结合第一方面,
在所述 E-E磁芯的中心柱开有气隙或所述 E-E磁芯的中心柱是断开的;
所述 E-E磁芯的边柱开有气隙或所述 E-E磁芯的中心柱是断开的。
在第二种可能的实现方式中, 结合第一方面或第一方面的第一种可能的实现方式, 所述可变电阻器包括滑动变阻器、 变阻箱以及电位器。
在第三种可能的实现方式中, 结合第一方面或第一方面的第一或第二种可能的实现 方式, 所述中心磁柱位于所述第一磁柱以及所述第二磁柱之间。
第二方面, 提供一种共模噪声阻抗调整方法, 应用于第一方面或第一方面的第一至 第三中任一种可能的实现方式中的所述电压变换器, 所述方法包括:
从第二接线端和第四接线端接收含有噪声的共模电流;
通过第一线圈和第二线圈将所述共模电流耦合到平衡绕组线圈上;
通过调整所述平衡绕组线圈上的可变电阻器的阻抗值以使所述共模电流的噪声阻 抗与电磁干扰滤波器的阻抗达到失匹配状态。
在第一种可能的实现方式中, 结合第二方面, 所述通过调整所述平衡绕组线圈上的 可变电阻器的阻抗值以使所述共模电流的噪声阻抗与电磁干扰滤波器的阻抗达到失匹 配状态包括:
调整所述可变电阻器的阻抗值,使得所述噪声源的等效阻抗值与所述电磁干扰滤波 器的等效阻抗值相等, 从而使所述噪声源的反射系数为零, 以使所述电磁干扰滤波器达 到最佳滤波效果。
本发明的实施例提供一种电压变换器和共模噪声阻抗调整方法,通过调整电压变换 器上平衡绕组中的平衡阻抗值来对共模噪声源的阻抗值进行调节,使得共模噪声源的阻 抗值与 EMI滤波器的阻抗值达到失匹配状态, 从而减小了对 EMI滤波器设计的限制, 使得 EMI滤波器的体积更小, 并且使用效率更高。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实施例或现有 技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本 发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还 可以根据这些附图获得其他的附图。
图 1为本发明实施例提供的一种电压变换器的结构示意图一;
图 2为本发明实施例提供的一种电压变换器的结构示意图二;
图 3为本发明实施例提供的一种共模阻抗调整器的结构示意图一;
图 4为本发明实施例提供的一种共模阻抗调整器的结构示意图二;
图 5为本发明实施例提供的一种共模阻抗调整器的等效示意图一;
图 6为本发明实施例提供的一种共模阻抗调整器的等效示意图二;
图 7为本发明实施例提供的一种共模阻抗调整器的等效示意图三;
图 8为本发明实施例提供的一种共模噪声阻抗调整方法的流程示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完 整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。
基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动前提下所获得的 所有其他实施例, 都属于本发明保护的范围。
传统的 EMI滤波系统由噪声源、 EMI (Electro-Magnetic Interference, 电磁干 扰) 滤波器以及 LISN (Line Impedance Stabilization Network, 线性阻抗稳定网络) 三部分组成。
假设噪声源的阻抗为 Zn, EMI滤波器的输入等效阻抗为 Zin, LISN的等效阻抗为
ZL, 则噪声源端的反射系数 z« + ;
当 ^?^时, 即反射系数 Γ =0时, 所有从噪声源发出的噪声会全部通过 ΕΜΙ滤波 器, ΕΜΙ滤波器将无法正常工作;
当 Ζη≠Ζίη时, 即反射系数 r≠o时, 噪声源发出的噪声会有一部分被反射回噪声 源, 而不再向 LISN侧传输;
其中, 当噪声源的阻抗为 ^与 EMI滤波器的输入等效阻抗 Ζίη达到最大失配状态 时, 噪声源发出的噪声信号几乎不会被传输到 LISN侧。
本发明的实施例即用于调整噪声源的阻抗以使得噪声源的阻抗与 EMI滤波器的输 入等效阻抗达到失匹配状态。
本发明实施例提供一种电压变换器 00, 如图 1所示, 所述电压变换器可用于直流 到直流、 直流到交流、 交流到交流和交流到直流的电压变换器领域, 所述电压变换器
00包括:
共模阻抗调整器 01和 EMI滤波器 02和噪声源 03, L表示火线, N表示零线, 其 中,所述共模阻抗调整器 01的一端与噪声源相连接,另一端和 EMI滤波器 02相连接, 当对该电压变换器 00进行测试时, 如图 2所示, 该电压变换器 00还可以与线性阻抗 稳定网络 04相连接, 线性阻抗稳定网络 04用于使得电压变换器 00在出厂时各部件 的指标性能达到出厂标准;
如图 3所示, 所述共模阻抗调整器 01包括: E-E磁芯 01 1、 第一线圈 012和第二 线圈 013、 平衡绕组线圈 014以及可变电阻器 015 ;
所述 E-E磁芯 01 1包括第一磁柱 01 1 1、 第二磁柱 01 12和中心柱 01 13, 所述中心 柱 01 13 可以在中间位置开有气隙也可以是断开的, 所述第一磁柱 01 1 1 和第二磁柱 01 12可以在中间位置开有气隙也可以是断开的, 在所述第一磁柱 01 1 1与所述第二磁
柱 0112上分别绕制有第一线圈 012和第二线圈 013, 从第一磁柱 0111上绕制的所述 第一线圈 012引出第一接线端 1和第二接线端 2,从第二磁柱 0112上绕制的所述第二 线圈 013引出第三接线端 3和第四接线端 4, 其中, 所述第二接线端 2距所述平衡绕 组线圈 014的距离小于所述第一接线端 1距所述平衡绕组线圈 014的距离, 所述第四 接线端 4距所述平衡绕组线圈 014的距离小于所述第三接线端 3距所述平衡绕组线圈 014的距离;
所述第一线圈 012、 所述第二线圈 013和所述平衡绕组线圈 014为电感线圈, 可 通过电感作用将电流从所述第一线圈 012和第二线圈 013耦合到平衡绕组线圈 014上, 可以 " 8 "字形绕过所述 E-E磁芯 011的所述中心柱 0113且不经过所述 E-E磁芯的所 述中心柱 0113, 并从所述平衡绕组线圈 014 上引出两个接线端接入所述可变电阻器 015;
以直流到直流的电压变压器领域中的 boost变换器为例, 在所述 E-E磁芯 011的 中心柱 0113的中间位置开有气隙, 且中心柱 0113在中间是断开的, 在所述平衡绕组 线圈 014中接入的可变电阻器 015包括滑动变阻器、 变阻箱以及电位器。 当第一线圈 012和第二线圈 013工作在共模模式下时, 如图 4所示, 即电流 从
1端流入, 电流 ^从 3端流入, 电流 产生的磁通为 Φ1, 电流 产生的磁通为 Φ2, 若 以磁通向上的方向为正方向, 则第一线圈 012产生的等效磁动势为上正下负, 第二线 圈 013产生的等效磁动势为上负下正, 此时, 该共模噪声调整器 01 的电压源磁阻等 效图如图 5所示, 其中 和 分别表示边柱 0111和边柱 0112等效的磁阻, R表示中 心柱 0113等效的磁阻, 和 表示第一线圈 012和第二线圈 013等效的电压源; 当第一线圈 012产生的等效磁动势和第二线圈 013产生的等效磁动势同时产生作 用时, 则该共模噪声调整器 01的电压源磁阻等效图 5可进一步化简为图 6, 如果忽略 漏感的影响, 对于共模电流, 从 1、 2端或 3、 4端等效的总电感为: r „ ψ ^ n x ni \ 2n2
T - 2 x—- 2 x
L∑ i R{ i R{ 即对于共模噪声源的共模噪声电流而言, 该共模噪声调整器 01 对共模噪声源的 共模噪声阻抗有较好的效果。
当共模电流从 2、 4端流入时, 共模噪声调整器 01可等效为一个变压器 02模型, 如图 7所示, 其中, 第一线圈 012和第二线圈 013可等效为该变压器 02的原边功率
电感 021, 平衡绕组线圈可等效为该变压器 02的副边 022, 变压器 02中的平衡阻抗 023为 Zb,噪声源 024的阻抗为 Zn,原边功率电感 021与副边电感 022的匝数比为 N: 1 ; 则平衡阻抗 023的阻抗值 Zb等效到原边为 N1, 此时原边等效的噪声源 024阻抗 为 N2, 因此, 可以通过调节平衡阻抗 023的阻抗值来调节噪声源 024的阻抗值。
本发明提供一种电压变换器, 通过调整电压变换器上平衡绕组中的平衡阻抗值来 对共模噪声源的阻抗值进行调节, 能够使得噪声源的共模阻抗值与 EMI滤波器的阻抗 值达到失匹配状态, 从而减小了对 EMI滤波器设计的限制, 使得 EMI滤波器的体积更 小, 并且使用效率更高。
本发明实施例提供一种共模噪声阻抗调整方法, 应用于本发明实施例提供的电压 变换器 00, 如图 8所示, 所述方法包括:
S10K 通过电压变换器两个边柱上的电感线圈接收含有噪声的共模电流。
具体的, 可通过以下方法实现:
通过电压变换器的第二接线端和第四接线端接收含有噪声的共模电流。
S 102、 通过电压变换器的耦合电感线圈将共模电流耦合到平衡绕组线圈上。
具体的, 可通过以下方法实现:
通过电压变换器的第一线圈和第二线圈将所述共模电流耦合到平衡绕组线圈上。
S103、 通过调整所述平衡绕组线圈上的可变电阻器的阻抗值以使所述共模电流的 噪声阻抗与电磁干扰滤波器的阻抗达到失匹配状态。
具体的, 可通过以下方法实现:
调整电压变换器的可变电阻器的阻抗值, 使得噪声源的等效阻抗值与电磁 干扰滤波器的等效阻抗值之间的差值尽可能地小, 从而使所述噪声源的反射系 数尽可能接近零, 以使电磁干扰滤波器达到较好滤波效果;
当调整使得噪声源的等效阻抗值与电磁干扰滤波器的等效阻抗值相等时, 噪声源 的反射系数为零, 电磁干扰滤波器达到最佳滤波效果。
本发明提供一种共模噪声阻抗调整方法, 通过调整电压变换器上平衡绕组中的平 衡阻抗值来对共模噪声源的阻抗值进行调节, 能够使得噪声源的共模阻抗值与 EMI滤 波器的阻抗值达到失匹配状态, 从而减小了对 EMI滤波器设计的限制, 使得 EMI滤波
器的体积更小, 并且使用效率更高。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的方法, 装置和系统可以 通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示意性的, 例如, 所述 单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可以有另外的划分方式, 例如多 个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元中, 也可以 是各个单元单独物理包括, 也可以两个或两个以上单元集成在一个单元中。 上述集成 的单元既可以采用硬件的形式实现, 也可以采用硬件加软件功能单元的形式实现。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到变化或 替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应以所述权 利要求的保护范围为准。
Claims
1、 一种电压变换器, 其特征在于, 包括:
共模阻抗调整器和电磁干扰滤波器, 所述共模阻抗调整器包括: E-E磁芯、 第一线 圈、 第二线圈、 平衡绕组线圈以及可变电阻器, 所述 E-E磁芯包括第一磁柱、 第二磁柱 和中心柱,在所述第一磁柱与所述第二磁柱上分别绕制有所述第一线圈以及所述第二线 圈, 从第一磁柱上绕制的所述第一线圈引出第一接线端和第二接线端, 从第二磁柱上绕 制的所述第二线圈引出第三接线端和第四接线端, 其中, 所述第二接线端距所述平衡绕 组的距离小于所述第一接线端距所述平衡绕组的距离,所述第四接线端距所述平衡绕组 的距离小于所述第三接线端距所述平衡绕组的距离;
所述平衡绕组线圈以 " 8 "字形绕在所述 E-E磁芯的所述第一磁柱以及所述第二磁柱 上且不经过所述 E-E磁芯的所述中心柱, 所述平衡绕组线圈的一端接在所述可变电阻器 可滑动的管脚上,所述平衡绕组线圈的另一端接在所述可变电阻器的两个不可滑动的管 脚中的任意一个管脚上;
所述电磁干扰滤波器通过所述第二接线端和所述第四接线端与所述共模阻抗调整 器相连接, 噪声源从所述第一接线端和所述第三接线端接入到所述共模阻抗调整器上。
2、 根据权利要求 1所述变换器, 其特征在于:
所述 E-E磁芯的中心柱开有气隙或所述 E-E磁芯的中心柱是断开的;
所述 E-E磁芯的边柱开有气隙或所述 E-E磁芯的中心柱是断开的。
3、 根据权利要求 1或 2所述的变换器, 其特征在于, 所述可变电阻器包括滑动变阻 器、 变阻箱以及电位器。
4、 根据权利要求 1-3任一所述的权利要求, 其特征在于:
所述中心磁柱位于所述第一磁柱以及所述第二磁柱之间。
5、 一种共模噪声阻抗调整方法, 其特征在于, 应用于权利要求 1-3任一所述的电压 变换器, 所述方法包括:
从第二接线端和第四接线端接收含有噪声的共模电流;
通过第一线圈和第二线圈将所述共模电流耦合到平衡绕组线圈上;
通过调整所述平衡绕组线圈上的可变电阻器的阻抗值以使所述共模电流的噪声阻 抗与电磁干扰滤波器的阻抗达到失匹配状态。
6、 根据权利要求 5所述方法, 其特征在于, 所述通过调整所述平衡绕组线圈上的可 变电阻器的阻抗值以使所述共模电流的噪声阻抗与电磁干扰滤波器的阻抗达到失匹配 状态包括:
调整所述可变电阻器的阻抗值,使得所述噪声源的等效阻抗值与所述电磁干扰滤波 器的等效阻抗值相等, 从而使所述噪声源的反射系数为零, 以使所述电磁干扰滤波器达 到最佳滤波效果。
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| CN103457454A (zh) * | 2013-08-21 | 2013-12-18 | 华为技术有限公司 | 一种电压变换器和共模噪声阻抗调整方法 |
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| US6873240B2 (en) * | 2001-08-21 | 2005-03-29 | Hitachi, Ltd. | Power converter |
| CN101093235A (zh) | 2007-07-20 | 2007-12-26 | 南京师范大学 | 基于Hilbert变换和电流探头的开关电源EMI噪声源内阻抗测试系统及测定方法 |
| CN101728968A (zh) * | 2010-01-19 | 2010-06-09 | 华为技术有限公司 | 一种磁集成双端变换器 |
| WO2011125944A1 (ja) * | 2010-04-05 | 2011-10-13 | 三菱電機株式会社 | 漏れ電流低減装置 |
| CN102244469A (zh) * | 2010-05-13 | 2011-11-16 | 鸿富锦精密工业(深圳)有限公司 | 可抑制电流谐波的开关电源 |
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| CN101197205A (zh) * | 2006-09-21 | 2008-06-11 | 福特环球技术公司 | 具有较大的共模和差模电感的电感器拓扑结构 |
| JP2009135271A (ja) * | 2007-11-30 | 2009-06-18 | Fuji Electric Systems Co Ltd | リアクトルおよびノイズフィルタ |
| CN202004639U (zh) * | 2011-03-13 | 2011-10-05 | 清流县鑫磁线圈制品有限公司 | 共模差模集成滤波器 |
| CN202384987U (zh) * | 2011-12-31 | 2012-08-15 | 成都芯通科技股份有限公司 | 一种磁集成装置 |
| CN103208913A (zh) * | 2012-01-11 | 2013-07-17 | 台达电子工业股份有限公司 | 滤波电抗级及应用该滤波电抗级的变频驱动系统 |
| CN103457454A (zh) * | 2013-08-21 | 2013-12-18 | 华为技术有限公司 | 一种电压变换器和共模噪声阻抗调整方法 |
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| US9425686B2 (en) | 2016-08-23 |
| EP2871761B1 (en) | 2019-01-16 |
| EP2871761A1 (en) | 2015-05-13 |
| CN103457454A (zh) | 2013-12-18 |
| CN103457454B (zh) | 2016-08-24 |
| EP2871761A4 (en) | 2016-02-24 |
| US20150103571A1 (en) | 2015-04-16 |
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