TWM471017U - Transformer used in inverse switch power source - Google Patents
Transformer used in inverse switch power source Download PDFInfo
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- TWM471017U TWM471017U TW102214228U TW102214228U TWM471017U TW M471017 U TWM471017 U TW M471017U TW 102214228 U TW102214228 U TW 102214228U TW 102214228 U TW102214228 U TW 102214228U TW M471017 U TWM471017 U TW M471017U
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Description
本創作涉及電路領域,更具體地涉及一種用在反激開關電源中的變壓器。This creation relates to the field of circuits, and more particularly to a transformer for use in a flyback switching power supply.
充電器是諸如手機之類的很多可擕式電子設備的必備零件產品。為諸如電容性觸控式螢幕智慧手機之類的帶有觸控式螢幕的可擕式電子設備提供電源的充電器需要同時滿足以下兩個條件:1)將共模雜訊(Common Mode Noise)降低到2伏以內;2)滿足可擕式電子設備的傳導抗擾度(Conducted Susceptibility,CS)方面的要求。充電器需要滿足的以上兩個條件對充電器中的關鍵部件“變壓器”提出了更高的要求。如何在解決電磁干擾(Electronic-Magnetic Interference,EMI)的同時有效降低共模雜訊和傳導抗擾度,是各類電源配套廠家生產的充電器是否具備市場競爭力的關鍵。如何在進一步簡化用在充電器中的變壓器的繞制工藝、節省繞制時間的同時解決EMI、Common Mode Noise和CS方面的問題,已經成為開關電源領域的一個亟待解決的問題。The charger is a must-have part of many portable electronic devices such as mobile phones. A charger that supplies power to a portable electronic device such as a capacitive touch screen smart phone with a touch screen must meet the following two conditions: 1) Common Mode Noise (Common Mode Noise) Reduced to less than 2 volts; 2) meet the requirements of Conducted Susceptibility (CS) for portable electronic devices. The above two conditions that the charger needs to meet put forward higher requirements for the key component "transformer" in the charger. How to effectively reduce common mode noise and conducted immunity while solving electromagnetic-magnetic interference (EMI) is the key to whether the chargers produced by various power supply manufacturers have market competitiveness. How to further simplify the winding process of the transformer used in the charger and save the winding time while solving the problems of EMI, Common Mode Noise and CS has become an urgent problem to be solved in the field of switching power supply.
鑒於以上所述的一個或多個問題,本創作提供了一種用在反激開關電源中的變壓器。In view of one or more of the problems described above, the present application provides a transformer for use in a flyback switching power supply.
根據本創作的實施例的用在反激開關電源中的變壓器包括骨架、磁芯、原邊繞組、副邊繞組、晶片輔助供電繞組、遮罩繞組、以及絕緣膠帶,其中:原邊繞組、副邊繞組、晶片輔助供電繞組、以及遮罩繞組被按照以下次序繞制:原邊繞組→晶片輔助供電繞組→遮罩繞組→副邊繞組;晶片輔助供電繞組是採用單或雙根線繞制而成的,並且其佔用的骨架寬度為骨架的整個寬度的1/2至3/4;遮罩繞組採用銅皮遮罩,其中銅皮 的長度為0.6至0.9圈,漆包線的一端連接到銅皮、另一端連接到骨架的原邊上的接地腳;原邊繞組、副邊繞組、晶片輔助供電繞組、以及遮罩繞組中的各繞組之間存在1至8層絕緣膠帶;原邊繞組是採用單根線繞三層、中間不加絕緣膠帶一次性繞制而成的;副邊繞組是採用三重絕緣線繞制而成的,並且相對於原邊繞組、晶片輔助供電繞組、以及遮罩繞組而言位於最外層。A transformer for use in a flyback switching power supply according to an embodiment of the present invention includes a bobbin, a magnetic core, a primary winding, a secondary winding, a chip auxiliary power supply winding, a mask winding, and an insulating tape, wherein: primary winding, vice The side windings, the chip auxiliary power supply windings, and the mask windings are wound in the following order: primary winding → wafer auxiliary power winding → mask winding → secondary winding; wafer auxiliary power supply winding is wound with single or double wires And the skeletal width occupied by it is 1/2 to 3/4 of the entire width of the skeleton; the cover winding is made of a copper cover, in which the copper is Length of 0.6 to 0.9 turns, one end of the enameled wire is connected to the copper skin, and the other end is connected to the grounding leg on the primary side of the skeleton; the primary winding, the secondary winding, the chip auxiliary power supply winding, and the windings in the shield winding There are 1 to 8 layers of insulating tape between them; the primary winding is made of a single wire wound three layers, and the middle winding is not wound with insulating tape; the secondary winding is made of triple insulated wire, and It is located at the outermost layer with respect to the primary winding, the wafer auxiliary power supply winding, and the shield winding.
本創作在考慮了產品量產性能一致性的基本上,減少了用在反激開關電源中的變壓器的繞制工序次數,大大提高了這種變壓器的生產效率,降低了這種變壓器的生產成本。另外,根據本創作的用在反激開關電源中的變壓器能通過EMI測試、Common Mode Noise、CS測試以及其他安全規範測試。This creation considers the consistency of the mass production performance consistency of the product, reduces the number of winding processes of the transformer used in the flyback switching power supply, greatly improves the production efficiency of the transformer, and reduces the production cost of the transformer. . In addition, the transformer used in the flyback switching power supply according to the present invention can pass EMI test, Common Mode Noise, CS test and other safety specification tests.
1‧‧‧交流整流電路1‧‧‧AC rectifier circuit
2‧‧‧EMI濾波電路2‧‧‧EMI filter circuit
3‧‧‧吸收電路3‧‧‧Absorption circuit
4‧‧‧回饋電路4‧‧‧Feedback circuit
5‧‧‧反激開關電路5‧‧‧ flyback switching circuit
6‧‧‧輸出整流濾波電路6‧‧‧Output rectification filter circuit
7‧‧‧控制電路7‧‧‧Control circuit
80‧‧‧保險絲(FUSE)80‧‧‧Fuse (FUSE)
81‧‧‧漏極(Drain)81‧‧‧Drain
82‧‧‧直流電源匯流排(Buck)82‧‧‧DC power bus (Buck)
83‧‧‧晶片輔助供電繞組(VDD繞組)83‧‧‧ wafer auxiliary power supply winding (VDD winding)
84‧‧‧接地(GND)84‧‧‧ Grounding (GND)
Q1‧‧‧開關管Q1‧‧‧Switch tube
85‧‧‧銅皮(Copper)85‧‧‧ Copper (Copper)
86‧‧‧訊號輸出腳(VDD)86‧‧‧Signal output pin (VDD)
第1圖示出了根據本創作的實施例的用在反激開關電源中的變壓器所應用於的反激開關電源的典型電路圖。Fig. 1 is a view showing a typical circuit diagram of a flyback switching power supply to which a transformer used in a flyback switching power supply according to an embodiment of the present invention is applied.
第2A圖和第2B圖示出了根據本創作的實施例的用在反激開關電源中的變壓器的繞制結構框圖,其中黑色圓點表示起繞點。2A and 2B are block diagrams showing the winding structure of a transformer used in a flyback switching power supply according to an embodiment of the present invention, in which black dots indicate winding points.
下面將詳細描述本創作各個方面的特徵和示例性實施例。下面的描述涵蓋了許多具體細節,以便提供對本創作的全面理解。但是,對於本領域技術人員來說顯而易見的是,本創作可以在不需要這些具體細節中的一些細節的情況下實施。下面對實施例的描述僅僅是為了通過示出本創作的示例來提供對本創作更清楚的理解。本創作絕不限於下面所提出的任何具體配置,而是在不脫離本創作的精神的前提下覆蓋了相關元素或部件的任何修改、替換和改進。Features and exemplary embodiments of various aspects of the present work are described in detail below. The following description covers many specific details to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely provided to provide a clearer understanding of the present invention by the example of the present invention. The present invention is in no way limited to any specific configuration as set forth below, but without departing from the spirit of the present invention, any modification, substitution, or modification of the related elements or components.
第1圖示出了根據本創作的實施例的用在反激開關電源中的變壓器所應用於的反激開關電源的典型電路圖。如第1圖所示,該反激 開關電源包括交流整流電路1、EMI濾波電路2、吸收電路3、回饋電路4、反激開關電路5、輸出整流濾波電路6、以及控制電路7。其中:Fig. 1 is a view showing a typical circuit diagram of a flyback switching power supply to which a transformer used in a flyback switching power supply according to an embodiment of the present invention is applied. As shown in Figure 1, the flyback The switching power supply includes an AC rectification circuit 1, an EMI filter circuit 2, an absorption circuit 3, a feedback circuit 4, a flyback switch circuit 5, an output rectification filter circuit 6, and a control circuit 7. among them:
交流整流電路1包括保險絲(FUSE)80和整流二極體,並且交流整流電路1的主要作用在於對交流電壓進行整流。The AC rectifying circuit 1 includes a fuse (FUSE) 80 and a rectifying diode, and the main function of the AC rectifying circuit 1 is to rectify the AC voltage.
EMI濾波電路2包括電感、高壓電解電容、及靜電放電(Electro-Static Discharge)電阻,並且EMI濾波電路2的主要作用在於抑制EMI及整流後濾波。The EMI filter circuit 2 includes an inductor, a high voltage electrolytic capacitor, and an Electro-Static Discharge resistor, and the main function of the EMI filter circuit 2 is to suppress EMI and post-rectification filtering.
吸收電路3包括電容、電阻、及二極體(吸收電路的構成可以根據不同的系統要求而變化),並且吸收電路3的主要作用在於抑制漏極(Drain)81電壓尖峰值。The absorbing circuit 3 includes a capacitor, a resistor, and a diode (the configuration of the absorbing circuit can be varied according to different system requirements), and the main function of the absorbing circuit 3 is to suppress the peak value of the drain 81 voltage.
回饋電路4包括取樣電阻,並且回饋電路4的主要作用在於通過變壓器初級供電繞組按比例感應次級的交流電壓,並且將所感應的交流電壓經過取樣電阻送到控制電路7。The feedback circuit 4 includes a sampling resistor, and the main function of the feedback circuit 4 is to proportionally sense the secondary AC voltage through the transformer primary supply winding and to deliver the induced AC voltage to the control circuit 7 via the sampling resistor.
反激開關電路5包括反激變壓器(即,以上所述的用在反激開關電源中的變壓器)、開關三極管、及電流檢測電阻。其中,反激變壓器的原邊繞組的兩端分別和吸收電路3中的Buck(直流電源匯流排)82和Drain(漏極)81相連,副邊繞組的兩端(A和B)分別和輸出整流濾波電路6中的輸出整流二極體的正端和接地相連,晶片輔助供電繞組(VDD繞組)83的兩端分別和控制電路7中的接地(GND)84和供電端C相連,遮罩繞組和VDD繞組83的GND 84相連。The flyback switching circuit 5 includes a flyback transformer (i.e., a transformer used in a flyback switching power supply as described above), a switching transistor, and a current detecting resistor. Wherein, both ends of the primary winding of the flyback transformer are respectively connected with Buck (DC power supply bus) 82 and Drain (Drain) 81 in the absorbing circuit 3, and both ends (A and B) of the secondary winding are respectively output The positive terminal of the output rectifying diode in the rectifying and filtering circuit 6 is connected to the ground, and the two ends of the chip auxiliary power supply winding (VDD winding) 83 are respectively connected to the ground (GND) 84 and the power supply terminal C in the control circuit 7, and the mask The winding is connected to the GND 84 of the VDD winding 83.
輸出整流濾波電路6包括輸出整流二極體和濾波電容兩個主要部分。針對不同的輸出紋波要求,輸出整流濾波電路6可以增加p型濾波電路或者共模濾波電路。The output rectification filter circuit 6 includes two main parts of an output rectifying diode and a filter capacitor. For different output ripple requirements, the output rectification filter circuit 6 can add a p-type filter circuit or a common mode filter circuit.
控制電路7的主要器件是一脈寬調製驅動晶片(例如,OB2540或類似功能的控制晶片)及必要的周邊輔助元件。其中,該脈寬調製驅動晶片包含但不限於6只功能腳,分別是:A:補償腳,外接電容到GND 84;B:電流檢測腳,用於檢測電壓信號,用於關斷及保護等功能; C:開關管驅動腳,用於驅動開關管Q1,通過開關管Q1連接到反激開關電路5;D:回饋信號腳,用於輸出電壓檢測,與回饋電路4相連;E:GND 84為接地腳;F:供電腳,用於提供工作電壓,通過C點的整流濾波供電電路與反激開關電路5相連。The primary device of control circuit 7 is a pulse width modulated drive die (e.g., OB2540 or similarly functioning control die) and the necessary peripheral auxiliary components. The pulse width modulation driving chip includes but is not limited to six functional pins, respectively: A: compensation pin, external capacitor to GND 84; B: current detecting pin, used for detecting voltage signal, for turning off and protecting, etc. Features; C: switch tube drive pin for driving switch tube Q1, connected to flyback switch circuit 5 through switch tube Q1; D: feedback signal pin for output voltage detection, connected to feedback circuit 4; E: GND 84 is grounded F: The power supply pin is used to provide the working voltage, and the rectification and filtering power supply circuit through the C point is connected to the flyback switch circuit 5.
第2A圖和第2B圖示出了根據本創作的實施例的用在反激開關電源中的變壓器的繞制結構框圖,其中黑色圓點表示起繞點。具體地,第2A圖示出了熱點起繞的根據本創作的實施例的用在反激開關電源中的變壓器的繞制結構圖,第2B圖示出了冷點起繞的根據本創作的實施例的用在反激開關電源中的變壓器的繞制結構圖。2A and 2B are block diagrams showing the winding structure of a transformer used in a flyback switching power supply according to an embodiment of the present invention, in which black dots indicate winding points. Specifically, FIG. 2A shows a winding structure diagram of a transformer used in a flyback switching power supply according to an embodiment of the present invention, and FIG. 2B shows a cold spot winding according to the present invention. A winding structure diagram of a transformer used in a flyback switching power supply of an embodiment.
如第2A圖和第2B圖所示,根據本創作的實施例的用在反激開關電源中的變壓器包括骨架、一對磁芯、一組原邊繞組、一組副邊繞組、一組晶片輔助供電繞組、一組遮罩繞組、以及絕緣膠帶。其中,該用在反激開關電源中的變壓器中的各繞組的繞制順序如下:原邊繞組→晶片輔助供電繞組→遮罩繞組→副邊繞組。As shown in FIGS. 2A and 2B, the transformer used in the flyback switching power supply according to the embodiment of the present invention includes a skeleton, a pair of magnetic cores, a set of primary windings, a set of secondary windings, and a set of wafers. Auxiliary power windings, a set of shroud windings, and insulating tape. Wherein, the winding sequence of each winding in the transformer used in the flyback switching power supply is as follows: primary winding→ wafer auxiliary power supply winding→mask winding→secondary winding.
在繞制根據本創作的實施例的用在反激開關電源中的變壓器(即,以上所述的反激變壓器)的過程中,需要在各繞組之間增加1~ 8層絕緣膠帶,以方便下一層繞組能夠被平滑繞制,從而提高變壓器的一致性;在完成原邊繞組、晶片輔助供電繞組、遮罩繞組、以及副邊繞組的繞制之後,以2~ 3層絕緣膠帶對這些繞組加以固定;最後,將磁芯和骨架上配套並用絕緣膠帶固定,以便形成根據本創作的實施例的新型反激變壓器。In the process of winding a transformer used in a flyback switching power supply according to an embodiment of the present invention (ie, the flyback transformer described above), it is necessary to add 1 to 8 layers of insulating tape between the windings for convenience. The next layer of windings can be smoothly wound to improve the consistency of the transformer; after completing the winding of the primary winding, the chip auxiliary power supply winding, the mask winding, and the secondary winding, the windings are made of 2 to 3 layers of insulating tape. Finally, the core and the bobbin are mated and secured with insulating tape to form a novel flyback transformer in accordance with an embodiment of the present invention.
在一實施例中,原邊繞組可以採用單根線繞三層、中間不加絕緣膠帶一次性繞完,以提高變壓器的繞制效率;晶片輔助供電繞組可以採用單或雙根線繞制,並且其佔用的骨架寬度為整個骨架的1/2~ 3/4;遮罩繞組可以採用銅皮(Copper)85遮罩,漆包線一端連接到Copper 85,一端連接到骨架原邊的GND 84腳上,銅皮85長度優選為0.6~ 0.9圈;副邊繞組可以採用三重絕緣線,並且相對於反激變壓器中的其他繞組而言位於最外層。在反激變壓器中的各繞組的繞制結束後,外加2~ 3層膠帶對這些繞 組進行固定。In an embodiment, the primary winding can be wound by a single wire around three layers without an insulating tape in the middle to improve the winding efficiency of the transformer; the wafer auxiliary power supply winding can be wound by single or double wires. And it occupies a skeleton width of 1/2 ~ 3/4 of the entire skeleton; the mask winding can be covered with a Copper 85, one end of the enameled wire is connected to the Copper 85, and one end is connected to the GND 84 of the primary side of the skeleton. The copper skin 85 preferably has a length of 0.6 to 0.9 turns; the secondary winding may be a triple insulated wire and is located at the outermost layer with respect to the other windings in the flyback transformer. After the winding of each winding in the flyback transformer is completed, 2 to 3 layers of tape are applied to fix the windings.
在根據本創作的實施例的用在反激開關電源中的變壓器中,原邊繞組的兩端分別連接到骨架原邊的兩個腳上(Buck 82和Drain 81腳);晶片輔助供電繞組(VDD繞組)83的兩端分別連接到骨架原邊的接地腳(GND)84和訊號輸出腳(VDD)86;遮罩繞組採用銅皮(Copper)85遮罩,漆包線一端連接到Copper 85,一端連接到骨架原邊的GND 84腳上(第2A圖和第2B圖中的漆包線連接在Copper 85中端,實際中漆包線也可以連接在Copper 85的前端或者後端);副邊繞組的兩端分別連接到骨架副邊的兩個腳(B和A,B連接到輸出電容的接地,A連接到輸出整流二極體的正端)。In the transformer used in the flyback switching power supply according to the embodiment of the present invention, both ends of the primary winding are respectively connected to the two legs of the primary side of the skeleton (Buck 82 and Drain 81); the chip auxiliary power supply winding ( The two ends of the VDD winding 83 are respectively connected to the ground pin (GND) 84 and the signal output pin (VDD) 86 of the primary side of the skeleton; the cover winding is covered with a Copper 85, and one end of the enameled wire is connected to the Copper 85, one end Connect to the GND 84 pin on the primary side of the skeleton (the enameled wire in Figures 2A and 2B is connected to the center of the Copper 85. In practice, the enameled wire can also be connected to the front or rear end of the Copper 85); Connect to the two legs of the secondary side of the skeleton (B and A, B connected to the ground of the output capacitor, A connected to the positive terminal of the output rectifier diode).
本創作在考慮了產品量產性能一致性的基本上,減少了變壓器繞制的工序次數,大大提高了變壓器的生產效率,從而降低了變壓器的生產成本。This creation considers the consistency of the mass production performance consistency of the product, reduces the number of processes of transformer winding, greatly improves the production efficiency of the transformer, and thus reduces the production cost of the transformer.
以上已經參考本創作的具體實施例來描述了本創作,但是本領域技術人員均瞭解,可以對這些具體實施例進行各種修改、組合和變更,而不會脫離由權利要求或其等同物限定的本創作的精神和範圍。The present invention has been described above with reference to the specific embodiments of the present invention, and it is understood by those skilled in the art that various modifications, combinations and changes may be made without departing from the scope of the appended claims. The spirit and scope of this creation.
81‧‧‧漏極(Drain)81‧‧‧Drain
82‧‧‧直流電源匯流排(Buck)82‧‧‧DC power bus (Buck)
83‧‧‧晶片輔助供電(VDD繞組)83‧‧‧ wafer auxiliary power supply (VDD winding)
84‧‧‧接地(GND)84‧‧‧ Grounding (GND)
85‧‧‧銅皮(Copper)85‧‧‧ Copper (Copper)
86‧‧‧訊號輸出腳(VDD)86‧‧‧Signal output pin (VDD)
Claims (6)
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CN2013202917374U CN203288400U (en) | 2013-05-24 | 2013-05-24 | Transformer used for flyback switch power supply |
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TWM471017U true TWM471017U (en) | 2014-01-21 |
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TW102214228U TWM471017U (en) | 2013-05-24 | 2013-07-29 | Transformer used in inverse switch power source |
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CN (1) | CN203288400U (en) |
TW (1) | TWM471017U (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103646756A (en) * | 2013-12-18 | 2014-03-19 | 天津光电惠高电子有限公司 | High-power-density switching power supply transformer and processing technology thereof |
CN104752031A (en) * | 2013-12-26 | 2015-07-01 | 西门子公司 | Pulse transformer, switching power supply with same and residual current device |
CN104240917B (en) * | 2014-09-26 | 2017-04-26 | 珠海市竞争电子科技有限公司 | Transformer for switching power supply of visual intercom system, and manufacturing method of transformer |
CN106208748B (en) * | 2016-09-05 | 2019-06-21 | 深圳市艾特智能科技有限公司 | Switching power circuit |
CN106409485A (en) * | 2016-10-12 | 2017-02-15 | 昆山联滔电子有限公司 | Transformer |
CN107610929B (en) * | 2017-09-22 | 2019-05-31 | 浙江大学 | The design method of inverse-excitation type switch power-supply Transformer shielding winding |
CN108320892B (en) * | 2018-03-02 | 2020-09-08 | 深圳创维-Rgb电子有限公司 | Transformer and switching power supply |
CN108831700A (en) * | 2018-06-14 | 2018-11-16 | 美的集团股份有限公司 | Transformer and electrical equipment including it |
-
2013
- 2013-05-24 CN CN2013202917374U patent/CN203288400U/en not_active Expired - Lifetime
- 2013-07-29 TW TW102214228U patent/TWM471017U/en not_active IP Right Cessation
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CN203288400U (en) | 2013-11-13 |
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