WO2012083731A1 - 开关电源的消除噪声电路 - Google Patents

开关电源的消除噪声电路 Download PDF

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Publication number
WO2012083731A1
WO2012083731A1 PCT/CN2011/079540 CN2011079540W WO2012083731A1 WO 2012083731 A1 WO2012083731 A1 WO 2012083731A1 CN 2011079540 W CN2011079540 W CN 2011079540W WO 2012083731 A1 WO2012083731 A1 WO 2012083731A1
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circuit
power supply
capacitors
switching power
capacitor
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PCT/CN2011/079540
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English (en)
French (fr)
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李晓刚
唐镇平
江国权
唐旦
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深圳市航嘉驰源电气股份有限公司
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Publication of WO2012083731A1 publication Critical patent/WO2012083731A1/zh

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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
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • 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

Definitions

  • the present invention relates to the field of power supply technologies, and in particular, to a noise canceling circuit for a switching power supply.
  • power supply units that convert AC to DC include switching power supplies and linear power supplies.
  • Switching power supplies are widely used due to their small size, light weight and high efficiency. However, they generate certain noise during operation, which affects the normal operation of electronic equipment.
  • the Y capacitor of the switching power supply is deleted to reduce the coupling of the AC frequency noise between the primary and secondary of the switching power supply, thereby achieving the purpose of reducing noise.
  • the noise suppression effect of the switching power supply that removes the Y capacitor is still poor. Therefore, some people use the 3Pin input structure, that is, add a ground wire to the 2Pin AC input switching power supply, as shown in Figure 1.
  • the 3Pin input structure is better than the 2Pin AC input switching power supply with the Y capacitor, the suppression effect is better, but the cost is higher and the volume is larger.
  • a primary object of the present invention is to provide a noise canceling circuit for a switching power supply, which aims to improve the noise canceling effect and reduce the production cost.
  • the invention provides a noise elimination circuit for a switching power supply, comprising a transformer, wherein a primary winding is connected to an AC input terminal, a secondary winding is connected to a DC output terminal, and further comprising at least one set of symmetric Y capacitors, the set of symmetry
  • the first Y capacitor of the Y capacitor is respectively connected to the positive input terminal of the AC input terminal and the negative output terminal of the DC output terminal
  • the second Y capacitor is respectively connected to the negative input terminal of the AC input terminal and the negative output terminal of the DC output terminal.
  • the first Y capacitor and the second Y capacitor have the same capacity of the symmetric Y capacitor.
  • the plurality of sets of symmetric Y capacitors are connected in series, that is, each group of symmetric first Y capacitors are connected in series, and the second Y capacitors of each group of symmetric Y capacitors are connected in series.
  • the plurality of sets of symmetric Y capacitors are connected in parallel, that is, the first Y capacitors of each group of symmetric Y capacitors are connected in parallel, and the second Y capacitors of each group of symmetric Y capacitors are connected in parallel.
  • the noise canceling circuit of the switching power supply further includes a rectifying and filtering circuit connected in series between the secondary winding of the transformer and the DC output end, and performing rectifying and filtering processing on the output signal of the transformer.
  • the noise canceling circuit of the switching power supply further includes a voltage converting circuit and a feedback control circuit, wherein the voltage converting circuit is serially connected between the rectifying and filtering circuit and the DC output end; one end of the feedback control circuit is connected to the DC output end. The other end is connected to the voltage conversion circuit for collecting voltage information of the DC output terminal, and generating a feedback adjustment signal according to the voltage signal to adjust the output of the voltage conversion circuit.
  • the voltage conversion circuit is a Buck conversion circuit, a Boost conversion circuit or a Buck-Boost conversion circuit
  • the feedback control circuit is a PWM control circuit
  • the invention not only achieves the purpose of eliminating noise by setting a symmetric Y capacitor, but also has the following advantages compared with the prior art:
  • the transformer in the switching power supply of the present invention can achieve up to five levels of energy efficiency even by using the conventional sandwich winding method, and the switching power supply of the prior art in which the Y capacitor is removed has the highest energy efficiency and can only achieve the energy efficiency of the fourth level.
  • the switching power supply of the invention complies with electromagnetic compatibility standards, such as the European standard EN55022 CLASS B and the US standard FCC PART15 CLASS B, and can guarantee more than 6dB margin.
  • the noise canceling circuit of the invention can reduce the volume of the switching power supply, reduce the cost and the process.
  • the 3Pin socket is 20% larger than the 2Pin socket, and the price is 30% higher, and the process problems such as ground welding and electrical isolation are increased.
  • FIG. 1 is a schematic structural view of an embodiment of a noise canceling circuit of a switching power supply according to the present invention
  • FIG. 2 is a schematic structural view of another embodiment of a noise canceling circuit of a switching power supply according to the present invention.
  • FIG. 3 is a schematic structural diagram of still another embodiment of a noise canceling circuit of a switching power supply according to the present invention.
  • FIG. 4 is a schematic structural view of still another embodiment of a noise canceling circuit of the switching power supply of the present invention.
  • FIG. 1 is a schematic structural diagram of an embodiment of a noise canceling circuit of a switching power supply.
  • the noise canceling circuit of the switching power supply of this embodiment comprises a transformer T and at least one set of symmetric Y capacitors.
  • the primary winding T1 of the transformer T is connected to the alternating current input terminal 10, and the secondary winding T2 is connected to the direct current output terminal 20.
  • a set of symmetrical Y capacitors includes a first Y capacitor CY1 and a second Y capacitor CY2.
  • the first Y capacitor CY1 is respectively connected to the positive input terminal of the AC input terminal 10 and the negative output terminal of the DC output terminal 20, and the second Y capacitor CY2 is respectively connected to the negative input terminal of the AC output terminal 10 and the negative output terminal of the DC output terminal 20, respectively. end.
  • the AC input terminal 10 is preferably a 2Pin input, including a live input terminal and a neutral input terminal, wherein the live input terminal is the positive input terminal of the AC input terminal 10, and the neutral input terminal is the negative input terminal of the AC input terminal 10.
  • the first Y capacitor CY1 and the second Y capacitor CY2 have the same capacity.
  • the transformer in the switching power supply of the present invention can achieve up to five levels of energy efficiency even by using the conventional sandwich winding method, and the switching power supply of the prior art in which the Y capacitor is removed has the highest energy efficiency and can only achieve the energy efficiency of the fourth level.
  • the switching power supply of the invention complies with electromagnetic compatibility standards, such as the European standard EN55022 CLASS B and the US standard FCC PART15 CLASS B, and can guarantee more than 6dB margin.
  • the noise canceling circuit of the invention can reduce the volume of the switching power supply, reduce the cost and the process.
  • the 3Pin socket is 20% larger than the 2Pin socket, and the price is 30% higher, and the process problems such as ground welding and electrical isolation are increased.
  • FIG. 2 is a schematic structural view of another embodiment of a noise canceling circuit of the switching power supply of the present invention.
  • each set of symmetric first Y capacitors CY1 is connected in series, and the first of each set of symmetric Y capacitors
  • the two Y capacitors CY2 are connected in series.
  • the plurality of first Y capacitors CY1 and the plurality of second Y capacitors CY2 are respectively connected in series, so that the Y capacitor can not only achieve the purpose of the above embodiment, but also accurately control the capacity and withstand voltage of the Y capacitor. Requirements, so that the effect of eliminating noise is more obvious.
  • FIG. 3 is a schematic structural view of still another embodiment of a noise canceling circuit of a switching power supply of the present invention.
  • multiple sets of symmetric Y capacitors in this embodiment are connected in parallel, that is, the first Y capacitors CY1 of each group of symmetric Y capacitors are connected in parallel, and each group of symmetric Ys The second Y capacitor CY2 in the capacitor is connected in parallel.
  • the plurality of first Y capacitors CY1 and the plurality of second Y capacitors CY2 are respectively connected in series, so that the Y capacitor can not only achieve the purpose of the above embodiment, but also accurately control the capacity and withstand voltage of the Y capacitor. Requirements, so that the effect of eliminating noise is more obvious.
  • the set of symmetrical Y capacitors may also include a plurality of first Y capacitors CY1 connected in parallel, a plurality of first Y capacitors CY1 connected in series, and a plurality of second Y capacitors CY2 connected in parallel, and a plurality of second Y capacitors CY2 connected in series.
  • FIG. 4 is a schematic structural view of still another embodiment of a noise canceling circuit of the switching power supply of the present invention.
  • the noise canceling circuit of the switching power supply of the embodiment further includes:
  • the rectifying and filtering circuit 30 is connected in series between the secondary winding T2 of the transformer T and the DC output terminal 20, and performs rectifying and filtering processing on the output signal of the transformer T;
  • the voltage conversion circuit 40 is connected in series between the rectification filter circuit 30 and the DC output terminal 20;
  • the feedback control circuit 50 has one end connected to the DC output terminal 20 and the other end connected to the voltage conversion circuit 40 for collecting voltage information of the DC output terminal 20, and generating a feedback adjustment signal according to the voltage signal to adjust the voltage conversion circuit 40. Output.
  • the rectifying and filtering circuit 30 described above may include a rectifying circuit and a filtering circuit.
  • the rectifier circuit is used for rectifying the power frequency AC generated by the transformer T and converting it into a DC signal.
  • the rectifier circuit can be a single-phase rectifier circuit or a three-phase rectifier circuit, or a half-wave rectifier circuit or a full-wave rectifier circuit. Or bridge rectifier circuit.
  • the filter circuit is used for filtering the ripple in the voltage outputted by the rectifier circuit, and may be a filter capacitor, a filter inductor or a complex filter circuit composed of an inductor and a filter capacitor.
  • the feedback control circuit 50 can collect the voltage signal of the DC output terminal 20, and generate a feedback signal to the voltage conversion circuit 40 according to the acquisition signal, so that the voltage conversion circuit 40 can fix the DC value of the amplitude according to the feedback signal of the feedback control circuit 50.
  • the voltage is converted to a DC voltage of variable amplitude or polarity to meet different load requirements.
  • the voltage conversion circuit 40 may be a Buck conversion circuit, a Boost conversion circuit, or a Buck-Boost conversion circuit.
  • Feedback control circuit 50 can be a PWM feedback controller.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
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Description

开关电源的消除噪声电路
技术领域
本发明涉及电源技术领域，特别涉及一种开关电源的消除噪声电路。
背景技术
目前，可将交流转换为直流的电源装置包括开关电源和线性电源。开关电源由于其体积小、重量轻和效率高的显著特点而得到广泛应用，但是其在工作过程中会产生一定的噪声，影响电子设备的正常工作。
现有的2Pin交流输入开关电源中，通过删除开关电源中Y电容，以减小开关电源初次级之间交流频率噪声的耦合，从而达到减小噪声的目的。但是删除Y电容的开关电源的噪声抑制效果仍然不佳。因此，又有人利用3Pin输入的结构，即在2Pin交流输入开关电源上增加地线，如图1所示。虽然该3Pin输入结构较删除Y电容的2Pin交流输入开关电源的结构，抑制效果更好，但是其需要的成本较高，体积也较大。
因此，急需一种既能达到很好的噪声消除效果，又降低生产成本的开关电源消除噪声电路。
发明内容
本发明的主要目的是提供一种开关电源的消除噪声电路，旨在提高噪声消除效果，且降低生产成本。
本发明提供的一种开关电源的消除噪声电路，包括变压器，其初级绕组与交流输入端连接，次级绕组与直流输出端连接，其中还包括至少一组对称的Y电容，所述一组对称的Y电容中第一Y电容分别连接交流输入端的正输入端及直流输出端的负输出端，第二Y电容分别连接交流输入端的负输入端及直流输出端的负输出端。
优选地，上述对称的Y电容中第一Y电容与第二Y电容的容量相等。
优选地，上述多组对称的Y电容串联连接，即各组对称的第一Y电容之间串联连接，各组对称的Y电容中的第二Y电容之间串联连接。
优选地，上述多组对称的Y电容并联连接，即各组对称的Y电容中的第一Y电容之间并联连接，各组对称的Y电容中的第二Y电容之间并联连接。
优选地，上述开关电源的消除噪声电路还包括整流滤波电路，串接在所述变压器的次级绕组与直流输出端之间，对变压器输出信号进行整流滤波处理。
优选地，上述开关电源的消除噪声电路还包括电压变换电路及反馈控制电路，所述电压变换电路串接在整流滤波电路与直流输出端之间；所述反馈控制电路的一端与直流输出端连接，另一端与电压变换电路连接，用于采集直流输出端的电压信息，并根据所述电压信号产生反馈调节信号，调节电压变换电路的输出。
优选地，上述电压变换电路为Buck变换电路、Boost变换电路或者Buck-Boost变换电路，所述反馈控制电路为PWM控制电路。
本发明通过设置对称的Y电容，不但达到消除噪声的目的，而且相对于现有技术，还具有以下优点：
（1）效率高。本发明的开关电源中的变压器即使使用传统的三明治绕法，也可以达到高达5级能效，而现有技术中删除Y电容的开关电源，其能效最高也仅能达到4级能效。
（2）EMC性能好。本发明的开关电源符合电磁兼容标准，例如欧洲标准EN55022 CLASS B和美国标准FCC PART15 CLASS B，并可以保证6dB以上的裕量。
（3）工艺简单，成本低。本发明的消除噪声电路相对于现有技术中3Pin输入结构，可以减小开关电源的体积，降低成本和工艺。例如3Pin插座比2Pin插座的尺寸大20%，价格高30%，且增加地线焊接、电气隔离等工艺问题。
（4）具有普遍的实用性。由于在强插式适配器电源中，常用的如CCC、UL、VDE等插脚均只有2Pin，因此，本发明在强插式电源中具有普遍的实用性。
附图说明
图1是本发明开关电源的消除噪声电路一实施例的结构示意图；
图2是本发明开关电源的消除噪声电路另一实施例的结构示意图；
图3是本发明开关电源的消除噪声电路又一实施例的结构示意图；
图4是本发明开关电源的消除噪声电路又一实施例的结构示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
图1提出了开关电源的消除噪声电路一实施例的结构示意图。
本实施例开关电源的消除噪声电路，包括变压器T及至少一组对称的Y电容。变压器T的初级绕组T1与交流输入端10连接，次级绕组T2与直流输出端20连接。一组对称的Y电容包括第一Y电容CY1及第二Y电容CY2。其中，第一Y电容CY1分别连接交流输入端10的正输入端及直流输出端20的负输出端，第二Y电容CY2分别连接交流输出端10的负输入端及直流输出端20的负输出端。
上述交流输入端10优选为2Pin输入，包括火线输入端及零线输入端，其中火线输入端为上述交流输入端10的正输入端，零线输入端为上述交流输入端10的负输入端。上述第一Y电容CY1与第二Y电容CY2的容量相等。
本实施例通过设置对称的Y电容，不但达到消除噪声的目的，而且相对于现有技术，还具有以下优点：
（1）效率高。本发明的开关电源中的变压器即使使用传统的三明治绕法，也可以达到高达5级能效，而现有技术中删除Y电容的开关电源，其能效最高也仅能达到4级能效。
（2）EMC性能好。本发明的开关电源符合电磁兼容标准，例如欧洲标准EN55022 CLASS B和美国标准FCC PART15 CLASS B，并可以保证6dB以上的裕量。
（3）工艺简单，成本低。本发明的消除噪声电路相对于现有技术中3Pin输入结构，可以减小开关电源的体积，降低成本和工艺。例如3Pin插座比2Pin插座的尺寸大20%，价格高30%，且增加地线焊接、电气隔离等工艺问题。
（4）具有普遍的实用性。由于在强插式适配器电源中，常用的如CCC、UL、VDE等插脚均只有2Pin，因此，本发明在强插式电源中具有普遍的实用性。
图2是本发明开关电源的消除噪声电路另一实施例的结构示意图。
参照图2，在上述实施例的基础上，本实施例中的多组对称的Y电容串联连接，即各组对称的第一Y电容CY1之间串联连接，各组对称的Y电容中的第二Y电容CY2之间串联连接。
该对称的Y电容中通过将多个第一Y电容CY1及多个第二Y电容CY2分别串联，使得该Y电容不但可以实现上述实施例的目的，而且可以精确控制Y电容的容量及耐压要求，从而使得消除噪声的效果更加明显。
图3是本发明开关电源的消除噪声电路又一实施例的结构示意图。
参照图3，在上述实施例的基础上，本实施例中的多组对称的Y电容并联连接，即各组对称的Y电容中的第一Y电容CY1之间并联连接，各组对称的Y电容中的第二Y电容CY2之间并联连接。
该对称的Y电容中通过将多个第一Y电容CY1及多个第二Y电容CY2分别串联，使得该Y电容不但可以实现上述实施例的目的，而且可以精确控制Y电容的容量及耐压要求，从而使得消除噪声的效果更加明显。
当然，为了满足更多控制Y电容的容量及耐压要求，该一组对称的Y电容也可以同时包括多个并联连接的第一Y电容CY1、多个串联连接的第一Y电容CY1，及多个并联连接的第二Y电容CY2、多个串联连接的第二Y电容CY2。
图4是本发明开关电源的消除噪声电路又一实施例的结构示意图。
在上述实施例的基础上，本实施例开关电源的消除噪声电路还包括：
整流滤波电路30，串联在上述变压器T的次级绕组T2与直流输出端20之间，对变压器T输出信号进行整流滤波处理；
电压变换电路40，串联在整流滤波电路30与直流输出端20之间；
反馈控制电路50，其一端与直流输出端20连接，另一端与电压变换电路40连接，用于采集直流输出端20的电压信息，并根据该电压信号产生反馈调节信号，调节电压变换电路40的输出。
上述整流滤波电路30可以包括整流电路和滤波电路。其中，整流电路用于对变压器T产生的工频交流进行整流处理，转换成直流信号，该整流电路可以为单相整流电路或三相整流电路，也可以为半波整流电路、全波整流电路或桥式整流电路。滤波电路则用于滤除经过整流电路而输出的电压中的纹波，可以为滤波电容、滤波电感或由电感与滤波电容组成的复式滤波电路。
上述反馈控制电路50可以采集直流输出端20的电压信号，并根据该采集信号产生反馈信号至电压变换电路40，以便电压变换电路40可以根据反馈控制电路50的反馈信号，将幅值固定的直流电压变换成幅值或极性可变的直流电压，以满足不同的负载需求。其中，该电压变换电路40可以为Buck变换电路、Boost变换电路或者Buck-Boost变换电路。反馈控制电路50可以为PWM反馈控制器。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (7)

  1. 一种开关电源的消除噪声电路，包括变压器，其初级绕组与交流输入端连接，次级绕组与直流输出端连接，其特征在于，还包括至少一组对称的Y电容，所述一组对称的Y电容中第一Y电容分别连接交流输入端的正输入端及直流输出端的负输出端，第二Y电容分别连接交流输入端的负输入端及直流输出端的负输出端。
  2. 如权利要求1所述的开关电源的消除噪声电路，其特征在于，所述对称的Y电容中第一Y电容与第二Y电容的容量相等。
  3. 如权利要求2所述的开关电源的消除噪声电路，其特征在于，所述多组对称的Y电容串联连接，即各组对称的第一Y电容之间串联连接，各组对称的Y电容中的第二Y电容之间串联连接。
  4. 如权利要求2所述的开关电源的消除噪声电路，其特征在于，多组对称的Y电容并联连接，即各组对称的Y电容中的第一Y电容之间并联连接，各组对称的Y电容中的第二Y电容之间并联连接。
  5. 如权利要求1至4中任一项所述的开关电源的消除噪声电路，其特征在于，还包括整流滤波电路，串接在所述变压器的次级绕组与直流输出端之间，对变压器输出信号进行整流滤波处理。
  6. 如权利要求1至4中任一项所述的开关电源的消除噪声电路，其特征在于，还包括电压变换电路及反馈控制电路，所述电压变换电路串接在整流滤波电路与直流输出端之间；所述反馈控制电路的一端与直流输出端连接，另一端与电压变换电路连接，用于采集直流输出端的电压信息，并根据所述电压信号产生反馈调节信号，调节电压变换电路的输出。
  7. 如权利要求6所述的开关电源的消除噪声电路，其特征在于，所述电压变换电路为Buck变换电路、Boost变换电路或者Buck-Boost变换电路，所述反馈控制电路为PWM控制电路。
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Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102044961A (zh) * 2010-12-23 2011-05-04 深圳市航嘉驰源电气股份有限公司 开关电源的消除噪声电路
CN103596334A (zh) * 2013-11-15 2014-02-19 深圳市聚作照明股份有限公司 一种led驱动电源加y电容线路
CN105610317A (zh) * 2016-01-11 2016-05-25 深圳市志凌伟业技术股份有限公司 触控显示器及其驱动电路
CN108075644B (zh) * 2016-11-18 2020-07-14 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075650B (zh) * 2016-11-18 2020-09-15 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075649B (zh) * 2016-11-18 2020-07-14 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075646B (zh) * 2016-11-18 2020-07-14 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075638B (zh) * 2016-11-18 2020-09-15 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075639B (zh) * 2016-11-18 2020-09-15 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075642B (zh) * 2016-11-18 2020-09-15 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075647B (zh) * 2016-11-18 2020-09-15 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075641B (zh) * 2016-11-18 2020-07-14 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075640B (zh) * 2016-11-18 2020-07-14 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075643B (zh) * 2016-11-18 2020-09-15 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075648B (zh) * 2016-11-18 2020-07-14 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、开关电源、直流电源及家用电器
CN108075645B (zh) * 2016-11-18 2020-09-15 佛山市顺德区美的电热电器制造有限公司 Emi抑制电路、非隔离式开关电源、直流电源及家用电器
CN116054574A (zh) * 2022-07-07 2023-05-02 荣耀终端有限公司 一种开关电源电路、电源适配器与电子设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2840505Y (zh) * 2005-08-15 2006-11-22 刘卫军 开关电源模块
CN1996711A (zh) * 2006-12-08 2007-07-11 广州电器科学研究院 感应耦合式无线电能传输装置
JP2010268623A (ja) * 2009-05-15 2010-11-25 Hitachi Koki Co Ltd 充電装置
CN102044961A (zh) * 2010-12-23 2011-05-04 深圳市航嘉驰源电气股份有限公司 开关电源的消除噪声电路
CN201893695U (zh) * 2010-12-23 2011-07-06 深圳市航嘉驰源电气股份有限公司 开关电源的消除噪声电路

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3430107B2 (ja) * 2000-02-23 2003-07-28 エヌイーシ−カスタムテクニカ株式会社 漏洩電流抑制回路およびそれを使用した電源装置
CN101202150B (zh) * 2006-12-13 2011-03-30 艾默生网络能源系统有限公司 一种emc滤波电感
CN101437346A (zh) * 2008-12-31 2009-05-20 青岛艾因达电气有限公司 全数字高频无极灯
KR20100092157A (ko) * 2009-02-12 2010-08-20 삼성전기주식회사 전도 ｅｍｉ 저감을 위한 파워 컨버터 트랜스포머 및 이를 포함하는 전원 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2840505Y (zh) * 2005-08-15 2006-11-22 刘卫军 开关电源模块
CN1996711A (zh) * 2006-12-08 2007-07-11 广州电器科学研究院 感应耦合式无线电能传输装置
JP2010268623A (ja) * 2009-05-15 2010-11-25 Hitachi Koki Co Ltd 充電装置
CN102044961A (zh) * 2010-12-23 2011-05-04 深圳市航嘉驰源电气股份有限公司 开关电源的消除噪声电路
CN201893695U (zh) * 2010-12-23 2011-07-06 深圳市航嘉驰源电气股份有限公司 开关电源的消除噪声电路

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