200807844 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種濾波元件及其製造方法，特別是 關於-種可以同時具㈣除共模雜訊與差模雜訊的滤波 元件及其製造方法。 【先前技術】 現今人們使用電器非常頻繁’而運用電器不免會使 用到電源，才能使其電器正常運作。但是，由於電^在 使用父流電源時’可能會因為電源供應、高頻變壓器或 是其他元件之寄生電容或是雜散電容的運作，使得由交 流電源所供應的電流中，常會夾帶著雜訊電流，這即是 電磁干擾現象。 一般而言，使用交流電源會產生的雜訊包含差模雜 訊（differential mode noise)以及共模雜訊（c〇mm〇n njode noise)，而EMI濾波電路可作為電源抗電磁輻射的 第一道防線，主要是由扼流線圈（ch〇ke c〇il)和電容器 (capacitor)組成，扼流線圈的作用為抑制雜訊產生或進 入電子儀為或设備中。請參照第1A圖，其係美國公告號 第4, 587, 507號發明專利之鐵芯的示意圖。在第1A圖 中，習用扼流線圈之鐵芯1係由非晶質金屬合金 (amorphous metallic all〇y)薄帶所構成。由於非晶質 金屬合金的使用頻率通常低於100千赫茲（kHz)，且其耐 DC-bias特性也較差，因而在鐵芯J中設計一氣隙（&卜 gap)2 ’以企圖改善耐dc-bias特性較差之缺點。但此做 法卻會大幅降低扼流線圈之初導磁率（ini1：ial 5 200807844 permeability)。 請參照第IB圖，其係美國公告號第6,456，182 發明專利之鐵芯的示意圖。為了要消除共模雜訊，美國u 公告號第6’456, 182號發明專利中所揭露的方式是利用 3個獨立的鐵芯！ la、i lb、【lc組合以成為一用來消除 共模雜訊之扼流線圈。鐵芯lla、Ub、Uc的材質為氧 ，磁性物質，在鐵芯與鐵芯中間以絕緣材料或黏膠隔 開，利用3個獨立的鐵芯lla、llb、Uc之尺寸共振現 象，可以使其操作頻率延伸至1〇MHz，使得雜訊在 到^ΟΜΗζ冑可以被有效消;咸。然而，此種使用3個鐵怒 堆豐在一起之方式，將使得扼流線圈之整體高度增加， 不利於微小化的趨勢。此外，此種扼流線圈只能用來消 除共模雜訊，並無法消除差模雜訊。 請參照第ic圖，其係美國公告號第5,581 224號 發明專利之鐵芯的示意圖。為了能夠具有同時消除^ 雜訊與差模雜訊，美國公告號第5,581，224號發明專利 t揭露一種扼流線圈，其主要是由兩獨立之鐵芯，分別 是位於外圍的鐵芯I11與位於内部之鐵芯114组成，並 纏繞繞線18後而成。鐵芯1U的材質為磁性鐵氧體 (ferrite)或非晶質物質，而鐵芯114為一低導磁率的粉 末鐵芯（dust Core)’於鐵芯1U和114中間以絕緣材質 隔開。利用鐵s m之高導磁率的特性來濾除共模雜 =，並利用鐵芯114之低導磁率的特性來濾除部分之差 模雜訊，然而，此種擺設兩獨立鐵芯之方式，將使得整 個扼流線圈所佔的面積相當大，而不利於微小化。且由 於必須於兩獨立鐵芯之間塗佈一絕緣材質來將其兩者隔 200807844 開，不僅增加材料成本，且此種結構需人工組裝，消耗 工時。再者，由於鐵芯極易產生漏感而影響週遭的元件， 且鐵芯本身也很容易受到週遭磁場的影響，使得元件 性不穩定。 ^ …因此’要如何製作同時能夠用來有效消除共模雜訊 和差杈雜汛之扼流線圈，且能在經濟成本的考量 合整體體積微小化之趨勢，正是此領域人士亟需研究^ 方而。 【發明内容】 伴及立因^決上述問題’本發明係提出—種遽波元 5 能狗同時有效消除共模雜訊和差模雜 也’並^效“濾波效果。另外，由於能夠在同一遽波 兀件中就能具備消除差模和共模的雜訊 ；' 降低成本及其所佔的體積。 此约有a …!艮!康本發明的目的’提出一種濾波元件，包括-共 核二、；^ 、一第二鐵芯以及一成型用 係包括一第一鐵芯盘至少—❹nώ〆、模應/皮件 .Μβ货'、y %線，且繞線係環繞於第一 =11鐵芯係完整包覆於共模濾波件外。其中 m成型用容器中，且第-鐵 〜ΐϋΐ 相異之初導磁率值 、生方、、：心明的另一目的’另提出一種濾波元件之製 盥至少-结峻曰：/、杈濾波件’係包括一第-鐵芯 二置入成第-鐵芯外部;將共模 容器中並填滿===:磁性聚料於成型用 Ρ ，乂及進行一固化（curing)程 7 200807844 以固ΐ程序後磁性漿料即形成-第二鐵芯並 凡正匕復於共模濾波件外，且第一鐵芯與 別具相異之初導磁率值（# )。 、 質勺波元件*錢造方法，其第—鐵芯之材 磁=ί乳體(ierrite)，而第二鐵芯之材質係為-且枵二A，、t磁性漿料包括一磁性填充物與-樹脂， -1 i 樹脂（thermGsetting resin)或是 ^化性樹脂。磁性填充物包括—純鐵、含鐵磁性金 f 口孟、錳-鋅鐵氧體、或鎳_辞鐵氧體之磁性粉末，且 j磁性金屬合金係包括鐵；^合金、鐵銘合金、鐵石夕紹 5五、或鐵鎳合金。又磁性填充物佔磁性漿料的重量百 分比約為〇%以上且95%以下。另外，於第一鐵芯外更包 f絕緣外殼，且繞線係分別環繞於第一鐵芯與絕緣外 -又之外邛又第鐵4係利用射出成型或粉末加壓成型 而成，而第二鐵芯係利用灌漿成型並固化後而成。上述 之濾波元件係可應用於一扼流線圈、一 電感器或-產生雜訊之電子裝置，可消訊和 一差模雜訊。 為讓本發明之上述和其他目的、特徵、和優點能更 明顯易懂’下文特舉—較佳實施例，並配合所附圖式， 作詳細說明如下： 【實施方式】 卜 睛同時參照第2A圖、第2B圖、第2C圖與第3圖， =2A圖至第2C圖係依照本發明較佳實施例之濾波元件 製作時之各示意圖，而第3圖係本發明較佳實施例之濾 200807844 波兀件中之共模濾波件之示意圖。本發明較佳實施例所 揭，之濾、波元件20係、可應用於—扼流線圈，作為電源供 應裔、、電感器或其他可能產生雜訊之電子裝置之渡波 用或者亦可將上述之濾波元件使用於製作電感器， 亦可達到使電感器微小化之功用。濾波元件2〇主要包括 一共模濾波件30、一第二鐵芯22以及一成型用容器2扣 共杈濾波件30係包括一第一鐵芯32、一絕緣外殼％盘 二組繞線36。第-鐵芯32係利賴出成型或粉末加壓 成型而成，而絕緣外殼34係包覆於第一鐵芯32外，用 =增加絕緣性，並避免第一鐵芯32與第一鐵芯22相接 笱而叙生短路，且可提升耐電壓之特性。 一組繞線36係分別環繞於第一鐵芯32與絕緣外殼 之外部，且並具有四出線38a、38b、38c、38d。第二 係利用灌漿成型並固化後而成，且第二鐵芯22 ㈣覆於共模濾波件3〇外。其中共模濾波件3〇與 第一鐵芯22皆位於成型用容器24中。 制1 ’个赞叨季父佳實施例另提出一濾波元件20之 :化方法’包括：提供一共模濾波件3〇，係包括 一 鐵;且繞線36二且二組繞線36係分別環繞於第 中，® ，將共杈濾波件30置入一成型用容器24 之？:24係為一中央具有-預定空間之容器， 射二寸大小係相對應於後續要製作形成之第二 中尺j寸大小；倒入一磁性漿料於成型用容器24 ί完:二2化程序後磁性衆料即形成一第二鐵芯22 凡正匕a ; 杈濾波件3〇外，僅留四出線38a、38b、 9 200807844 元件進行電性連 38c、38d穿出第二鐵芯22，作為與外部 結之用。 共模濾波件30之《m2與包覆心卜之第一鐵 芯22係分別具相里之初莲碰至佶广、二π弟一鐵 22之導磁率比由於第二鐵怒 、、“手匕弟一鐵心32之導磁率要來得低，可用來 濾除^模雜訊’而對於由磁性鐵氧體所構成之第一鐵芯 32而言’其高導磁率的特性可用來濾除共模雜訊，如此 一 可達到僅以單一濾波元件20就能具備消除差模和 共模，雜訊的作用，進而能夠有效降低成本。再者，由 於共模濾波件30係内埋於第二鐵芯22中，使得濾波元 件20整體的體積能夠因内埋式的設計而達到符輕薄 短小 '微小化的趨勢。 如上述之濾波元件2〇及其製造方法，其第一鐵芯 32，材質包括磁性鐵氧體（ferrite)，而第二鐵芯22之 材工係气一磁性漿料。其中磁性漿料包括一磁性填充物 ” · Η月曰且樹月曰係為一熱固性樹脂（thermosetting resin)或是一光硬化性樹脂。磁性填充物包括一純鐵、 δ，磁性金屬合金、錳-辞鐵氧體、或鎳—辞鐵氧體之磁 ，勑末，且含鐵磁性金屬合金係包括鐵矽合金、鐵鈷合 金、鐵矽鋁合金、或鐵鎳合金。該磁性填充物佔磁性漿 料的重量百分比約為10%以上且98%以下。 以下將針對使用不同磁性漿料所製作之第二鐵芯 22，提出各式實驗數據，並相對地與習知僅能消除共模 雜訊之扼流線圈做一比較。 、 200807844 篇一類磁性填充物（鐵磁性金屬合合） 係利用上述之製作方式，使用各式之含鐵磁性金屬 合金之磁性粉末，搭配樹脂所配製而成之磁性漿料，其 濃度為85%重量百分比。其所得各式實驗數據如下表所 示0 DM插入損失 DM共振頻率 DM電感值 (dB) (MHz) UH)@10KHz 習知 20.l@30MHz 大於30 6· 38 3價鐵矽合金 40 18. 9 12. 23 6價鐵矽合金 41. 1 18· 6 12· 17 鐵钻合金 40. 2 21· 3 10· 68 鐵錄合金 ------- 40. 5 ~-—--- 17· 5 ------ 12. 73 、，由上表可知，依照本發明較佳實施例之濾波元件， 在差杈雜訊（Differential m〇de n〇ise，随 n〇ise)之電 感值之特性上，比習知僅能消除共模雜訊之扼流線圈增 =了一倍^右，故其效果非常明顯。另外，在差模雜訊 M)插入損失方面，依照本發明較佳實施例之濾波元 件，亦比習知僅能消除共模雜訊之扼流線圈增加;^一倍 左右。 口 -鋅鐵氣艚| 係利用上述之製作方式，使用具有不同初導磁率值 11 200807844 (v )之錳-鋅鐵氧體之磁性粉末，搭配樹脂所配製而成之 磁性漿料’其濃度約為8〇%〜85%重量百分比。其所得 各式實驗數據矣所示〇 DM插入損失 (dB) DM共振頻率 (MHz) DM電感值 (// H)@10KHz 習知 2〇·l@30MHz 大於30 6. 38 錳-鋅鐵氧體 - A10 37. 5 19. 3 14. 06 錳-鋅鐵氧體 - A05 38. 9 18. 6 14. 53 其中，A10表示其初導磁率值（“）為1〇〇〇〇，而 表示其初導磁率值（#)為5000。由上表可知，依照本發 明較佳實施例之濾波元件，在差模雜訊 mode noise，DM noise)之電感值之特性上，比習知僅能 /肖除共模雜訊之扼流線圈大於二倍以上，故其效果非常 明顯。f外，在差模雜訊（DM)插入損失方面，依照本發 明較佳實施例之濾波元件，亦比習知僅能消除乒模雜訊 ，流線圈增加了近一倍左右，且由於依照本發明較佳 實施例之濾波元件所表現出來的£^插入損失可以將 40分貝（dB)，展現出良好的差模濾波特性。 、 差·二類磁性填充▲物（鎞—鋅鐵氣體） 12 200807844 係^上述之製作方式，使料有不同初導磁率值 ϋίΓ 體之錄粉末，旨賴製而成之200807844 IX. INSTRUCTIONS: [Technical Field] The present invention relates to a filter element and a method of fabricating the same, and more particularly to a filter element capable of simultaneously (4) removing common mode noise and differential mode noise and manufacturing thereof method. [Prior Art] People use electrical appliances very frequently today, and the use of electrical appliances will inevitably lead to the use of electrical power to make their electrical appliances function properly. However, since the power supply, the parasitic capacitance of the high-frequency transformer or other components, or the operation of the stray capacitance may cause the current supplied by the AC power source to be trapped. Signal current, this is the phenomenon of electromagnetic interference. In general, the noise generated by the AC power supply includes differential mode noise and common mode noise (c〇mm〇n njode noise), and the EMI filter circuit can be used as the first power source to resist electromagnetic radiation. The line of defense is mainly composed of a choke coil (ch〇ke c〇il) and a capacitor (capacitor). The choke coil acts to suppress noise generation or enter the electronic device or device. Please refer to FIG. 1A, which is a schematic diagram of an iron core of the invention patent No. 4,587,507. In Fig. 1A, the core 1 of the conventional choke coil is composed of an amorphous metallic all-yellow ribbon. Since the amorphous metal alloy is usually used at a frequency lower than 100 kHz and its DC-bias resistance is also poor, an air gap (&gap) 2 ' is designed in the core J in an attempt to improve resistance. The disadvantage of poor dc-bias features. However, this method will greatly reduce the initial permeability of the choke coil (ini1: ial 5 200807844 permeability). Please refer to FIG. IB, which is a schematic diagram of an iron core of the invention patent No. 6,456,182. In order to eliminate common mode noise, the method disclosed in U.S. Patent No. 6'456, No. 182 is to utilize three independent cores! La, i lb, [lc are combined to become a choke coil for eliminating common mode noise. The cores 11a, Ub, and Uc are made of oxygen, and the magnetic substance is separated by an insulating material or a glue between the iron core and the iron core, and the size resonance phenomenon of the three independent iron cores 11a, 11b, and Uc can be used. Its operating frequency extends to 1〇MHz, so that the noise can be effectively eliminated; However, this way of using three iron anger stacks together will increase the overall height of the choke coil, which is not conducive to miniaturization. In addition, such choke coils can only be used to eliminate common mode noise and cannot eliminate differential mode noise. Please refer to the ic diagram, which is a schematic diagram of an iron core of the invention patent No. 5,581,224. In order to be able to eliminate both the noise and the differential mode noise, U.S. Patent No. 5,581,224 discloses a choke coil which is mainly composed of two independent cores, which are respectively located at the outer core I11 and The iron core 114 is located inside and is wound around the wire 18. The core 1U is made of a magnetic ferrite or an amorphous material, and the core 114 is a low magnetic permeability dust core which is separated by an insulating material between the cores 1U and 114. The high magnetic permeability of the iron sm is used to filter out the common mode noise, and the low magnetic permeability characteristic of the iron core 114 is used to filter out part of the differential mode noise. However, the way of arranging two independent cores is The area occupied by the entire choke coil will be quite large, which is not conducive to miniaturization. And because it is necessary to apply an insulating material between the two independent cores to separate them from 200807844, not only the material cost is increased, but also the structure needs manual assembly and consumes man-hours. Furthermore, since the iron core is highly susceptible to leakage, it affects the surrounding components, and the core itself is also susceptible to the surrounding magnetic field, making the component unstable. ^ ...so 'how to make a choke coil that can be used to effectively eliminate common mode noise and miscellaneous noise, and the economic cost considerations and the overall volume miniaturization trend, it is precisely in this field that people need to study ^ Fang and. SUMMARY OF THE INVENTION The following problems have been solved by the accompanying and erecting factors. The present invention proposes that the 遽波元5 can effectively eliminate the common mode noise and the differential mode at the same time, and also has a filtering effect. In the same chopper component, it is possible to eliminate the noise of the differential mode and the common mode; 'reducing the cost and the volume occupied by it. This is about a ...! 艮! The purpose of the invention is to propose a filter component, including - The common core 2, ^, a second core, and a molding system include a first core disk at least - ❹ n ώ〆, mold / leather. Μ β goods ', y % line, and the winding system is surrounded by A =11 core is completely covered by the common mode filter, wherein the m molding container, and the first -iron ~ ΐϋΐ different initial permeability value, raw,,: another purpose of the heart 'other A filter element is proposed to be at least-junction: /, the filter element 'includes a first-core core 2 to be placed outside the first core; the common mode container is filled and filled ===: magnetic aggregation It is expected to be used for forming Ρ, 乂 and performing a curing process 7 200807844 After the solidification process, the magnetic slurry is formed - the second core The 铁 匕 于 共 共 共 共 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕 匕Ierrite, and the material of the second core is - and the second magnetic material, the magnetic slurry comprises a magnetic filler and a resin, -1 i resin (thermGsetting resin) or a chemical resin. The filler includes: pure iron, magnetic powder containing ferromagnetic gold, manganese-zinc ferrite, or nickel_de-ferrite, and j magnetic metal alloy includes iron; alloy, iron alloy, iron Xishao 5 5, or iron-nickel alloy. The magnetic filler accounts for about 〇% and 95% by weight of the magnetic slurry. In addition, the outer core of the first core is covered with an insulating shell, and the winding system is respectively Surrounding the first core and the outer and outer, and the second iron is formed by injection molding or powder compression molding, and the second core is formed by grouting and solidification. It can be applied to a choke coil, an inductor or an electronic device that generates noise, which can be silenced and a differential mode noise. The above and other objects, features, and advantages of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; 2B, 2C, and 3, =2A to 2C are schematic views of a filter element in accordance with a preferred embodiment of the present invention, and FIG. 3 is a filter of a preferred embodiment of the present invention. 200807844 Schematic diagram of a common mode filter in a wave device. The filter and wave element 20 of the preferred embodiment of the present invention can be applied to a choke coil as a power supply, an inductor, or the like. The ultrasonic wave of the electronic device of the noise can also be used for making the inductor, and the function of miniaturizing the inductor can also be achieved. The filter element 2 〇 mainly includes a common mode filter member 30, a second core 22, and a molding container 2. The conjugate filter member 30 includes a first core 32, an insulating outer casing, and two sets of windings 36. The first core 32 is formed by molding or powder compression molding, and the insulating shell 34 is wrapped around the first core 32, and the insulation is increased by using the first core 32 and the first iron. The core 22 is connected to each other to describe a short circuit, and the characteristics of withstand voltage can be improved. A set of windings 36 surround the first core 32 and the exterior of the insulative housing, respectively, and have four outlets 38a, 38b, 38c, 38d. The second system is formed by grouting and solidification, and the second core 22 (4) is overlaid on the common mode filter. The common mode filter member 3A and the first core 22 are both located in the molding container 24. The system 1 further proposes a filter component 20: the method includes: providing a common mode filter component 3, comprising one iron; and winding 36 and two sets of winding 36 are respectively Surrounding the middle, ®, the conjugate filter 30 is placed in a molding container 24? :24 is a container with a predetermined space in the center, and the size of the shot is corresponding to the second medium-sized j-shape formed later; a magnetic slurry is poured into the molding container 24 ί: 2 After the program, the magnetic core material forms a second iron core 22; where the positive filter 〇 a; 杈 filter member 3 〇, leaving only four outlets 38a, 38b, 9 200807844 components for electrical connection 38c, 38d through the second iron The core 22 is used as an external junction. The common mode filter member 30 "m2 and the first core 22 of the wrapped heart, respectively, have the magnetic permeability ratio of the first phase of the lotus to the 佶广, the second π brother and the iron 22, due to the second iron anger," The magnetic permeability of the hand-cranked brother-core 32 is low, and can be used to filter out the noise. For the first core 32 composed of magnetic ferrite, its high magnetic permeability can be used to filter out. Common mode noise, such that only a single filter element 20 can eliminate the difference mode and common mode, noise, and thus can effectively reduce the cost. Moreover, since the common mode filter 30 is buried in the In the two cores 22, the volume of the filter element 20 as a whole can be made thinner and shorter than the built-in design. The filter element 2〇 and the manufacturing method thereof, the first core 32, The material includes a magnetic ferrite, and the material of the second core 22 is a magnetic slurry. The magnetic slurry includes a magnetic filler. · The moon and the tree are a thermosetting resin ( Thermosetting resin) or a photocurable resin. The magnetic filler comprises a pure iron, a δ, a magnetic metal alloy, a manganese-de-ferrite, or a nickel-de-ferrite magnetic, a ruthenium, and the ferromagnetic metal alloy includes a strontium alloy, an iron-cobalt alloy, Iron bismuth aluminum alloy, or iron nickel alloy. The magnetic filler accounts for about 10% by weight and 98% by weight of the magnetic slurry. In the following, various experimental data will be proposed for the second core 22 made using different magnetic pastes, and relatively compared with conventional choke coils which can only eliminate common mode noise. , 200807844, a magnetic filler (ferromagnetic metal combination) using the above-mentioned production method, using a magnetic powder containing various types of ferromagnetic metal alloy, prepared with a resin, the magnetic slurry, the concentration is 85% Weight percentage. The experimental data obtained in the following table are shown in the following table: 0 DM insertion loss DM resonance frequency DM inductance value (dB) (MHz) UH) @10KHz Conventional 20.l@30MHz Greater than 30 6· 38 3 price iron bismuth alloy 40 18. 9 12. 23 6-valent iron-bismuth alloy 41. 1 18· 6 12· 17 Iron-drilled alloy 40. 2 21· 3 10· 68 Iron-alloy alloy------- 40. 5 ~----- 17 · 5 ------ 12. 73, from the above table, the filter element according to the preferred embodiment of the present invention, in the inductance of differential noise In terms of the value, it is more than twice as long as the trickle coil that can only eliminate the common mode noise, so the effect is very obvious. In addition, in terms of differential mode noise M) insertion loss, the filtering element according to the preferred embodiment of the present invention is also increased by about twice as much as the conventionally known choke coil which can eliminate common mode noise. Mouth-zinc-iron gas enthalpy | The magnetic slurry prepared by using a magnetic powder of manganese-zinc ferrite having different initial permeability values of 11 200807844 (v), using the above-mentioned production method, It is about 8〇%~85% by weight. The various experimental data obtained are shown in 〇DM insertion loss (dB) DM resonance frequency (MHz) DM inductance value (// H)@10KHz Conventional 2〇·l@30MHz Greater than 30 6. 38 Manganese-zinc ferrite Body - A10 37. 5 19. 3 14. 06 Manganese-zinc ferrite - A05 38. 9 18. 6 14. 53 where A10 indicates that the initial permeability value (") is 1〇〇〇〇, and The initial magnetic permeability value (#) is 5000. As can be seen from the above table, the filter element according to the preferred embodiment of the present invention can only be characterized by the inductance value of the differential mode noise (DM noise). In addition to the common mode noise, the choke coil is more than twice as large, so the effect is very obvious. In addition, in terms of differential mode noise (DM) insertion loss, the filter component according to the preferred embodiment of the present invention is also Conventionally, only the ping-pong noise can be eliminated, the stream coil is nearly doubled, and the insertion loss exhibited by the filter element according to the preferred embodiment of the present invention can be 40 dB (dB), showing good The differential mode filtering characteristics, the difference, the second type of magnetic filling ▲ (鎞-zinc iron gas) 12 200807844 series ^ the above production method, so that Different initial permeability values recorded ϋίΓ body of powder from the system depends on the purpose of
：：：1^ 一其中，R7表不其初導磁率值（# )為15〇〇，而Κ22 表示其初導磁率值⑷為35G。由上表可知，依照本發 明較佳實施例之濾波元件，在差模雜訊（Differential mode n〇ise，μ n〇ise)之電感值之特性上，比習知僅能 消除共模雜訊之扼流線圈的效果要來的好。另外，在差 模雜訊（DM)插入損失方面，依照本發明較佳實施例之濾 波元件，亦比習知僅能消除共模雜訊之扼流線圈增加了 近倍左右，且由於依照本發明較佳實施例之濾波元件 所表現出來的DM插入損失可以將近4〇分貝（dB)，且在 較高頻位置則接近30MHz，展現出良好的差模濾波特 性。〇 综上所述，本發明較佳實施例之濾波元件，能夠同 13 200807844 果。另夕ί Γ由於、二约才差模雜訊，並有效提高渡波效 ::”雜訊，進而能夠有效降低成本及其所佔的體 因鐵缚短小、微小化的趨勢。再者，可避免習知 、心產生漏感而影響週遭元件的問題， 身因受到週遭磁場的影響， 用以本發明已以—較佳實施例揭露如上，然其並非 夕杜、I疋本發明，任何熟習此技藝者，在不脫離本發明 、彳和範圍内，當可作各種之更動與潤飾，因此本發 之保護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 、第1Α圖係美國公告號第4, 587, 507號發明專利之 鐵芯的示意圖。 第1Β圖係美國公告號第6, 456, 182號發明專利之 鐵芯的示意圖。 、第1C圖係美國公告號第5, 581，224號發明專利之 鐵芯的示意圖。 一 苐2Α圖至第2C圖係依照本發明較佳實施例之濾波 70件製作時之各示意圖。 第3圖係本發明較佳實施例之濾波元件中之共模濾 波件之示意圖。 【主要元件符號說明】 1、11 a、11 b、11 c、111、114、：鐵芯 200807844 18 :繞線 2 :氣隙 20 :濾波元件 22 ··第二鐵芯 24 :成型用容器 30 :共模濾波件 32 :第一鐵芯 34 :外殼 36 :繞線 38a、38b、38c、38d :出線 15:::1^ One of them, R7 indicates that its initial permeability value (#) is 15〇〇, and Κ22 indicates that its initial permeability value (4) is 35G. As can be seen from the above table, the filter component according to the preferred embodiment of the present invention can only eliminate the common mode noise in the characteristics of the differential mode noise (μ n〇ise). The effect of the choke coil is good. In addition, in terms of differential mode noise (DM) insertion loss, the filter component in accordance with the preferred embodiment of the present invention is also increased by a factor of about a factor of about that of a choke coil that can only eliminate common mode noise, and The DM insertion loss exhibited by the filter element of the preferred embodiment of the invention can be approximately 4 〇 decibels (dB) and close to 30 MHz at higher frequency positions, exhibiting good differential mode filtering characteristics. In summary, the filter component of the preferred embodiment of the present invention can be the same as 13 200807844. On the other hand, ί Γ 、 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Avoiding the problem that the heart is leaky and affecting the surrounding components, and the body is affected by the surrounding magnetic field. The present invention has been disclosed in the preferred embodiment as above, but it is not the invention, and is not familiar with the invention. The scope of protection of the present invention is subject to the definition of the scope of the appended patent application, without departing from the scope of the invention. Figure 1 is a schematic view of an iron core of the invention patent No. 4,587, 507 of the U.S. Patent No. 4,587, 507. Fig. 1 is a schematic view of an iron core of the invention patent No. 6, 456, 182. Schematic diagram of the iron core of the invention patent No. 5, 581, 224. Figures 2 through 2C are schematic views of the filter 70 in accordance with a preferred embodiment of the present invention. Figure 3 is a view of the present invention. In the filter element of the preferred embodiment Schematic diagram of the mode filter. [Main component symbol description] 1, 11 a, 11 b, 11 c, 111, 114, iron core 200807844 18: winding 2: air gap 20: filter element 22 · · second core 24: molding container 30: common mode filter 32: first core 34: outer casing 36: windings 38a, 38b, 38c, 38d: outlet 15