200917297 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種變壓器，特別是關於一種可對高頻 電源升壓之變壓器。 【先前技術】 變壓器具有電壓、電流或阻抗轉換的功能’廣泛地應 用於配電系統及各式電器產品。請參照圖一，其係為習知 變壓器裝置之示意圖。變壓器1係利用電能與磁能轉換感 應的原理，將一初級側繞線11及一次級侧繞線12兩組線 圈分別旋繞在共同的鐵芯10上。 其中，初級侧繞線11連接至一電源端31，次級側繞 線12連接至一負載端32 ’並藉由初級側繞線η與次級側 繞線12所旋繞匝數的比例來調整輸出至負載端％的電壓 與電流。 理論上’當變壓器的轉換效率為1〇〇%時，初級側繞 線11的輸入功率與次級側繞線12的輸出功率相同，但實 際上由於激磁所產生的磁力線不可能全部被侷限在鐵芯 10中，再加上其他損耗，轉換效率必定有所損失。 身又來w兒’變壓器1運作時所產生的損失要項有鐵 損、鋪及絕緣茂漏損失，而目前的工業技術能力已可將 上述損失控制在合理的範圍内。 但是，當鮮超過音頻(約2_z)，且要將電壓升高 到2_V以上時，轉換損失會顯著的增加。其中，鐵損及 200917297 ^的:^原因’主要的原_是分佈電容量與雜散電 算 :關於電容量對辨損失的影響，可依照下解式來估200917297 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a transformer, and more particularly to a transformer that can boost a high frequency power supply. [Prior Art] Transformers have the function of voltage, current or impedance conversion' widely used in power distribution systems and various electrical products. Please refer to Figure 1, which is a schematic diagram of a conventional transformer device. The transformer 1 uses a principle of electric energy and magnetic energy conversion induction to wind a primary side winding 11 and a primary side winding 12 two sets of coils on a common core 10, respectively. Wherein, the primary side winding 11 is connected to a power terminal 31, and the secondary side winding 12 is connected to a load terminal 32' and is adjusted by the ratio of the number of turns of the primary side winding η to the secondary side winding 12. The voltage and current output to the load terminal %. Theoretically, when the conversion efficiency of the transformer is 1%, the input power of the primary side winding 11 is the same as the output power of the secondary side winding 12, but in reality, the magnetic lines of force generated by the excitation cannot be all limited. In the iron core 10, together with other losses, the conversion efficiency must be lost. The losses caused by the operation of Transformer 1 are iron loss, paving and insulation leakage, and the current industrial technical capability has been able to control the above losses within a reasonable range. However, when the audio exceeds the audio (about 2_z) and the voltage is raised above 2_V, the conversion loss is significantly increased. Among them, the iron loss and 200917297 ^: ^ reason 'the main original _ is the distributed capacitance and the stray calculation: the impact of the capacitance on the discriminant loss, can be estimated according to the following formula
電容抗的計算式·ϋπ xFxC 電谷1以1PF、頻率為lOOKhz代入， 可得電容抗： 1/2 X 3.14 X 100EXP3 χ 1ΕΧΡ- = 1<59ΜΩ 當電壓值為80〇〇ν時，損失功率為：Calculation formula of capacitance resistance · ϋπ xFxC Electric valley 1 is substituted with 1PF and frequency of lOOKhz, and the capacitance can be obtained: 1/2 X 3.14 X 100EXP3 χ 1ΕΧΡ- = 1<59ΜΩ When the voltage value is 80〇〇ν, the power is lost. for:
8000V2 + i.59MQ=40VA 證ί上主述計算得知，即使只有1冲電容量，當頻率為 ιη_ *卩卩會產生1.5·的容抗’此容抗值在電壓值 '所損失的功率尚不顯著，但在電壓值達到8000V 時’損失功率可達4〇va。 j而變壓器為傳統繞線方式時，其分佈電容量遠大 於1PF ’因此將造成極大的功率損失，而使得驅動電路或 變壓器本身無法承受。 °月，照圖一 A，其係為習知變壓器1之次級側繞線12 工法示意圖。圖中顯示了次級側繞線12以傳統的「往返重 疊繞法」旋繞於鐵芯10的外部，其中，鐵芯1〇外部通常 會先套堍—繞線架13，然後再將次級側繞線12(如：銅線) 方疋繞於繞線架13上’且繞滿一層後再繞第二層，如此往返 地旋繞’直到繞滿所設計的匝數(圈數）。 200917297 以並聯的'方式—層:地間所形成的分佈電容係 乂羊時’相敎魏著電齡“逐漸增加 率在观施加預期犧值，當頻 時，消耗功料ΐ / 而當頻率升高至励版 護電路立騎作 Α，而造成驅動電路無法負荷，保 堉翏照圖二;Β 線工法示咅I f知麵11以—種次級側繞 ㈣去I植。圖中顯不了次級側繞線12以傳統的「多溝 二套芯1G的外部。其中，鐵芯1G外部通常 丨塌獅突出部 溝槽。然後，再將次級侧繞線12(如： 銅、，後繞於該些溝槽内，直到繞滿所設計的峨圈數）。 同樣地’將上狀賴H進行相同條件的測試實驗， 在電源端施加_的值，#_在2()版時，消耗功 率約60VA。而當鮮升高至卿版時，消耗功率約為 180=。雖然消耗功率較前一實施例小，但二欠級侧繞線 的較高電壓端附近發生電暈放電(c〇_)現象，而造成急 速的溫升現象(約5分鐘㈣超過8G〇c)。這樣的溫升現 象’容易造成變壓裝置過熱而損壞。 因此’藉由上述之實驗可以得知，高頻率的升壓裝置 若要順利運作，必須克服繞線的分佈電容量及介質放電的 問題。 近年來，大尺寸液晶顯示器内背光裝置所使用的外部 200917297 電極螢光燈(EEFL)、冷陰極燈管（CCFL)、整面型背光源 (FFL)或電漿產生器...等，其工作頻率皆大於20Khz，皆 必須使用高頻的變壓器來驅動。因此，如何降低變壓器在 高頻時的功率損失，實為當前技術所必須解決的問題。 【發明内容】 本發明之一目的係在於有效降低變壓器之繞線的雜散 電容量、層間分佈電容量及對地電容量。當工作頻率處於 較高工作頻率時，變壓器之功率損失不會隨著電壓升高而 顯著增加。 本發明之另一目的係在於藉由本發明之繞組結構，使 得變壓器在高頻升壓的情況下，驅動電路與變壓器不會產 生顯著的溫升。 ^ 本發明提供一種變壓器，包括一鐵芯及至少—繞組。 繞組係由一長條型絕緣層與設置於絕緣層上之一導體層旋 繞於鐵芯外部而成’其中導體層之寬度小於絕緣層之寬曰度。 另外’變壓器更包括-初級侧繞線，旋繞於鐵芯外部。 當變壓ϋ為升觀壓ϋ時’初級嫩線之Ε數小於繞組之 阻數，且初級側繞線係連接至電源端，次級繞_連接至 負載端。 本發明提供一種變壓器的製造方法，至少包括下列步 驟： 提供一鐵芯。 提供一長條型之絕緣層。 200917297 設置一導體層於絕緣層上，且導體層之寬度小於絕緣 層之寬度。 同時將疊置在一起的絕緣層與導體層旋繞於鐵芯外 部0 關於本發明之優點與精神，以及更詳細的實施方式可 以藉由以下的實施方式以及所附圖式得到進一步的暸解。 【實施方式】 請參照圖三，其係為本發明之變壓器之示意圖。變壓 器2 ’包括一鐵芯20、一初級側繞線21及至少一繞組22 ^ 初級側繞線21旋繞於鐵芯20外部，可連接至一電源 & 31。在本發明中，係用一繞組22來取代習知變壓器的 次級側繞線。請同時參照圖四A，其係為繞組22旋繞於鐵 芯20外部之示意圖。繞組22係由一長條型絕緣層221與 设置於絕緣層221上之一長條型導體層222同時旋繞於鐵 芯20外部而成。其中，導體層222之寬度小於絕緣層22ι 之寬度’且導體層222可電性連接至一負載端。如圖所示， ^較佳實施例中，導體層222係被拉出，且連接至複數個 端子24，接著再由端子24連接到負載端。 另外’鐵芯20外部與繞組22之間，及鐵芯2〇外部與 初=側繞線21之間，通常皆設置有繞線架23。也就是說^ 鐵。2〇外°卩通纟會先套設繞線架23，然後再將初級側繞 線21與繞組22旋繞於繞線架23上。 在本發明之實施例中，鐵过2〇可為外鐵式、内鐵式或 200917297 單獨一支棒形。絕緣層221可為一低介電係數之塑膠膜或 紙。導體層222可為一條疊置於絕緣層221上的銅箱、紹 箱或者直接蒸鍍於絕緣層221上之金屬層。 並且，在較佳實施例中，絕緣層221寬度約為導體層 222寬度之1.5倍以上。絕緣層221及導體層222皆可具有 相當薄的厚度’使得繞組22即使具有相當多的旋繞匝數， 其導體厚度是依據流過電流而定，當用於升壓時次級電流 非常小所以導體厚度以微米計算。 請參照圖四B ’其係為繞組22旋繞於鐵芯20之橫截 面不意圖。如圖所示，繞組22之橫截面中，導體層2^2 係以鐵芯20為中心，由繞線架23外表面螺旋地向外旋繞。 並且，繞組22中相鄰匝之導體層222之間皆具有絕緣層 221，藉此使相鄰匝之導體層222不會互相接觸。而繞組 22，高壓輸出端是由低端繞組逐層重疊後自然支撐，所以 最尚電麗點可运離初級及地端，且以空間（空氣)取代一般 絕緣材料(最佳固體絕緣物之介電係數為2 〇9，而空氣之介 電係數為1)。 :參照圖四C，其係為繞組22旋繞於鐵芯2〇之縱切 面二思圖。繞組22之縱切面中，導體層222與絕緣層221 係父錯層疊於鐵芯2〇之上下兩侧。如圖所示，本發明之繞 組22係以每一層絕緣層221只繞一匝的「層疊繞法」逐層 7重疊起，，使得電場漸進式上升，並且使得每―阻之間的 刀佈電各成為串聯狀態。因此’繞組22 f子地及對初級的總 分佈電容得以大幅減少。 根據上述結構，本發明之變壓器的製造方法，至少包 200917297 括下列步驟： - 提供一鐵芯。 提供一長條型之絕緣層’並設置一導體層於絕緣層 上，其中導體層之寬度小於絕緣層之寬度。 將絕緣層與導體層同時旋繞於鐵芯外部，藉此形成一 繞組。在實施上，導體層可以疊置或蒸鍍的方式，設置於 該絕緣層上。 旋繞一初級侧繞線於鐵芯外部。 本發明實施例中，變壓器2為升壓變壓器，繞組22 係屬於高壓輸出端，係可謂一次級繞組22，故初級側繞線 21之匝數小於次級繞組22之匝數。然而，本發明之繞組 並不限定只應用於臣數較多的側繞線，亦可應用於匝數較 少的側繞線。 請參照圖五，其係為本發明之變壓器之另一實施例之 示意圖。由於繞組22係為對稱的獨立結構，當需要多組輸 出時，可以在鐵芯20外部繞置所需之繞組22數目，且視 需求作同^向献方向繞置的疊加組合，肋產 壓或反相電壓。 的門題丁 = Ϊ發明之繞線工法可以有效地解決習知技術 本發明之繞組之變壓器進行相同條件的 時，、施加預期的電題，當轉在職ζ ?耗力率約60VA，大致與習知結果相 尚至lOOKhz，-分铋雪厭估& 叩田頻早升 幻德^ 順利達到_V時，消耗功率約 目較於20Khz/_〇v之測試條件只多出13的 200917297 消耗功率® . 上述增加之13VA推論係為鐵損増加以及少量的分佈 電谷量所造成。所以，本發明之設計確實可以大量減少八 佈電容量及雜散電容量。另外，在本測試實驗以輸出端滿 足20Khz/8000V與100Khz/8000V相互比較並沒有顯著嶒 溫現象’滿載3小時後溫度約為5〇°C以下，已達到可商^ 化的規格需求。 綜上所述’本發明之變壓器具有下列優點： 一、 變壓器之次級侧繞線所採用之「疊層繞法」可使 最高壓端被自然支撐而遠離地端，且因減少使用高介電係 數絕緣材料作為支樓，而纽鱗低觀器之繞線間的雜 散電容量、層間分佈電容量及對地電容量。藉此，處於較 兩工作頻率時，變壓器之功率損失不會隨著電壓升高而 著增加。 二、 藉由具有「疊層繞法」之繞組結構，使得變壓器 在高頻升壓的情況下，驅動電路與變壓器不會產生顯著的 溫升。 、 三、 當變壓器之次級側繞線使用本發明之繞組結構 時，繞組之高壓輸出端係從低端繞組逐層重疊而自然支 撐，所以最高電壓點可遠離初級或地端。 本發明雖以較佳實例闡明如上’然其並非用以限定本 發明精神與發明實體僅止於上述實施例爾。對熟悉此項技 術者，當可輕易了解並利用其它元件或方式來產生相同的 功效。是以，在不脫離本發明之精神與範圍内所作之修改， 12 200917297 均應包含在下述之申請專利範圍内。 【圖式簡單說明】 所附圖示，將可輕易的了解 點，其中： 藉由以下詳細之描述結合 上述内谷及此項發明之諸多優 圖一係為習知變壓器之示意圖； 圖-A料習知變壓器之次級側繞線I法示意圖； 圖二B係為f知懸器之另—種次級側繞線工法示 圖二係為本發明之變壓器之示意圖； 圖四A係為繞組旋繞於鐵芯外部之示意圖； 圖四B係、為繞組旋繞於鐵芯之橫截面示意圖； 圖四c係為繞組旋繞於鐵怎之縱切面示意圖；以及 圖五係為本發明之變㈣之另—實糊之示意圖。 【主要元件符號說明】 忉、20 :鐵芯 12 :次級侧繞線 22 .繞組 222 :導體層 31 :電源端 1 ' 2 =變壓器 11、21 :初級側繞線 13、23 :繞線架 221 :絕緣層 24 .端子 32 :負載端8000V2 + i.59MQ=40VA The calculation on the ί 上 得知 计算 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上 上Not significant, but when the voltage reaches 8000V, the power loss can reach 4〇va. When the transformer is in the conventional winding mode, its distributed capacitance is much larger than 1 PF', thus causing a great power loss, which makes the drive circuit or the transformer itself unbearable. ° month, according to Figure A, which is a schematic diagram of the secondary side winding 12 of the conventional transformer 1. The figure shows that the secondary side winding 12 is wound around the outside of the core 10 by a conventional "reciprocating overlap winding method", wherein the outer core of the iron core 1 is usually first wrapped around the winding frame 13, and then the secondary The side winding 12 (e.g., copper wire) is wound around the bobbin 13 and wraps around the second layer, so as to be wound around the 'rounding' until the number of turns (turns) is designed. 200917297 In parallel 'mode-layer: the distributed capacitance formed by the ground is the time of the ' 时 ' 敎 敎 敎 电 电 “ “ “ “ “ “ “ “ “ “ “ “ “ “ 逐渐 逐渐 逐渐 逐渐 逐渐 逐渐 施加 施加 施加 施加 施加 施加 施加 施加 施加 施加 施加 施加 施加Raise to the excitation plate protection circuit for the ride, and the drive circuit can not be loaded, the protection according to Figure 2; Β line method shows 咅I f know face 11 to - secondary side winding (four) to I plant. The secondary side winding 12 is not shown in the conventional "multi-ditch two-core 1G outer part. Among them, the outer core 1G usually collapses the lion protruding groove. Then, the secondary side winding 12 (such as: copper) Then, wrap around the grooves until the number of turns is designed to be full. Similarly, the test of the same condition is performed on the upper surface, and the value of _ is applied to the power supply terminal, #_ at 2 ( In the version, the power consumption is about 60 VA, and when the fresh rise to the Qing version, the power consumption is about 180 =. Although the power consumption is smaller than that of the previous embodiment, the corona occurs near the higher voltage end of the second under-stage winding. Discharge (c〇_) phenomenon, causing rapid temperature rise (about 5 minutes (four) more than 8G〇c). Such temperature rise phenomenon is easy The transformer device is overheated and damaged. Therefore, it can be known from the above experiment that if the high-frequency boosting device is to operate smoothly, it must overcome the problem of distributed capacitance and dielectric discharge of the winding. In recent years, large-size liquid crystal The external 200917297 electrode fluorescent lamp (EEFL), cold cathode fluorescent lamp (CCFL), full-surface backlight (FFL) or plasma generator, etc. used in the backlight of the display, all operating at frequencies greater than 20Khz. It is necessary to use a high-frequency transformer to drive. Therefore, how to reduce the power loss of the transformer at high frequency is a problem that must be solved by the prior art. [Invention] One object of the present invention is to effectively reduce the winding of a transformer. The stray capacitance, the interlayer distributed capacitance and the ground capacitance. When the operating frequency is at a higher operating frequency, the power loss of the transformer does not increase significantly with the increase of the voltage. Another object of the present invention is to borrow According to the winding structure of the present invention, the driving circuit and the transformer do not generate a significant temperature rise in the case of high-frequency boosting of the transformer. A transformer comprising an iron core and at least a winding. The winding is formed by a long insulating layer and a conductor layer disposed on the insulating layer, and the width of the conductor layer is smaller than the width of the insulating layer. In addition, the 'transformer includes - the primary side winding, which is wound around the outside of the core. When the transformer is pressed, the number of turns of the primary tender line is smaller than the resistance of the winding, and the primary winding is connected to The power supply terminal is connected to the load terminal. The present invention provides a method for manufacturing a transformer, comprising at least the following steps: providing an iron core. Providing a long strip of insulating layer. 200917297 A conductor layer is disposed on the insulating layer, And the width of the conductor layer is smaller than the width of the insulating layer. At the same time, the insulating layer and the conductor layer stacked together are wound around the outer core of the core. 0 The advantages and spirit of the present invention, and more detailed embodiments can be achieved by the following embodiments. And the drawings are further understood. [Embodiment] Please refer to FIG. 3, which is a schematic diagram of a transformer of the present invention. The transformer 2' includes a core 20, a primary side winding 21, and at least one winding 22. The primary side winding 21 is wound around the outside of the core 20 and is connectable to a power source & In the present invention, a winding 22 is used in place of the secondary side winding of a conventional transformer. Please refer to FIG. 4A at the same time, which is a schematic diagram of the winding 22 being wound around the outside of the iron core 20. The winding 22 is formed by winding an elongated insulating layer 221 and an elongated conductor layer 222 provided on the insulating layer 221 around the outer core of the iron core 20. Wherein, the width of the conductor layer 222 is smaller than the width of the insulating layer 22 ι and the conductor layer 222 can be electrically connected to a load end. As shown, in the preferred embodiment, conductor layer 222 is pulled out and connected to a plurality of terminals 24, which in turn are connected to the load terminals by terminals 24. Further, between the outer portion of the core 20 and the winding 22, and between the outer portion of the core 2 and the first/side winding 21, a bobbin 23 is usually provided. That is to say ^ iron. The outer bobbin 23 is first placed around the bobbin 23, and then the primary side winding 21 and the winding 22 are wound around the bobbin 23. In the embodiment of the present invention, the iron may be a single rod shape of the outer iron type, the inner iron type or the 200917297. The insulating layer 221 can be a plastic film or paper having a low dielectric constant. The conductor layer 222 may be a copper box stacked on the insulating layer 221, a case or a metal layer directly evaporated on the insulating layer 221. Further, in the preferred embodiment, the width of the insulating layer 221 is about 1.5 times or more the width of the conductor layer 222. Both the insulating layer 221 and the conductor layer 222 can have a relatively thin thickness such that the winding 22 has a considerable number of winding turns, and the thickness of the conductor depends on the current flowing. When used for boosting, the secondary current is very small. The thickness of the conductor is calculated in microns. Referring to Figure 4B', the cross-section of the winding 22 wound around the core 20 is not intended. As shown, in the cross section of the winding 22, the conductor layer 2^2 is centered on the core 20 and spirally spiraled outwardly from the outer surface of the bobbin 23. Further, the insulating layer 221 is provided between the adjacent conductive layers 222 of the windings 22, whereby the adjacent conductive layers 222 are not in contact with each other. The winding 22, the high-voltage output end is naturally supported by the low-end winding layer by layer, so the most electric point can be transported away from the primary and ground ends, and the space (air) replaces the general insulating material (the best solid insulator The dielectric constant is 2 〇9, and the dielectric constant of air is 1). Refer to Figure 4C, which is a schematic view of the longitudinal section of the winding 22 wound around the core 2〇. In the longitudinal section of the winding 22, the conductor layer 222 and the insulating layer 221 are stacked on the upper and lower sides of the core 2〇. As shown in the figure, the winding 22 of the present invention is overlapped by a "stack winding method" of only one turn of each insulating layer 221, so that the electric field is progressively raised, and the knife cloth between each resistance is made. The electricity is in a series state. Therefore, the total distributed capacitance of the winding 22 f and the primary is greatly reduced. According to the above configuration, the method of manufacturing the transformer of the present invention includes at least the following steps: - providing an iron core. A strip-shaped insulating layer is provided and a conductor layer is provided on the insulating layer, wherein the width of the conductor layer is smaller than the width of the insulating layer. The insulating layer and the conductor layer are simultaneously wound around the outside of the core, thereby forming a winding. In practice, the conductor layer may be stacked or vapor deposited on the insulating layer. A primary side is wound around the outside of the core. In the embodiment of the present invention, the transformer 2 is a step-up transformer, and the winding 22 is a high-voltage output terminal, which is a primary winding 22, so that the number of turns of the primary side winding 21 is smaller than the number of turns of the secondary winding 22. However, the winding of the present invention is not limited to the side winding which is applied only to a large number of turns, and can also be applied to a side winding having a small number of turns. Please refer to FIG. 5, which is a schematic diagram of another embodiment of the transformer of the present invention. Since the windings 22 are symmetrical and independent structures, when a plurality of sets of outputs are required, the number of windings 22 required can be wound outside the core 20, and the superimposed combination of the winding directions according to the requirements, the rib production pressure Or reverse voltage. The door of the door = Ϊ The winding method of the invention can effectively solve the conventional technology. When the transformer of the winding of the present invention performs the same condition, the expected electric problem is applied, and when the duty is transferred, the power consumption rate is about 60VA, roughly The results of the conventional knowledge are still lOOKhz,---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Power Consumption® The 13VA inferences mentioned above are caused by iron loss and a small amount of distributed electricity. Therefore, the design of the present invention can significantly reduce the eight-capacitance capacity and the stray capacitance. In addition, in this test, the output end is satisfied with 20Khz/8000V and 100Khz/8000V, and there is no significant temperature phenomenon. After 3 hours of full load, the temperature is about 5 〇 °C or less, which has reached the requirements of commercial specifications. In summary, the transformer of the present invention has the following advantages: 1. The "stack winding method" used for the secondary side winding of the transformer allows the highest pressure end to be naturally supported away from the ground end, and The electric coefficient insulation material is used as a branch building, and the stray capacitance, the interlayer distribution capacitance and the ground capacitance between the windings of the Newscale low viewer. Thereby, at two operating frequencies, the power loss of the transformer does not increase as the voltage increases. Second, with the winding structure of the "stack winding method", the drive circuit and the transformer do not generate a significant temperature rise in the case of high-frequency boosting of the transformer. 3. When the secondary side winding of the transformer uses the winding structure of the present invention, the high voltage output end of the winding is naturally supported from the lower end winding layer by layer, so the highest voltage point can be away from the primary or ground end. The present invention has been described above by way of a preferred example, and is not intended to limit the spirit of the invention and the inventive subject matter. For those skilled in the art, other components or means can be easily understood and utilized to produce the same effect. Modifications made within the spirit and scope of the present invention, 12 200917297, are hereby incorporated by reference. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings will be readily understood, in which: the following detailed description in conjunction with the above-described inner valley and many of the inventions are a schematic diagram of a conventional transformer; Schematic diagram of the secondary side winding I method of the conventional transformer; Fig. 2B is a schematic diagram of the secondary side winding method of the present invention; Fig. 2 is a schematic diagram of the transformer of the present invention; Figure 4B is a schematic cross-sectional view of a winding wound around a core; Figure 4c is a schematic view of a longitudinal section of a winding wound around an iron; and Figure 5 is a variation of the invention (4) The other - a schematic diagram of the real paste. [Description of main component symbols] 忉, 20: Iron core 12: Secondary side winding 22. Winding 222: Conductor layer 31: Power supply terminal 1 ' 2 = Transformer 11, 21: Primary side winding 13, 23: Winding frame 221: Insulation layer 24. Terminal 32: Load end