五、新型說明： 【新型所屬之技術領域】 一種三相軸流式風扇，尤指一種採用三相直流控制 的三相軸流式風扇。 【先前技術】 隨著資訊產品體積的快速縮小，被包含於資訊產品 中的馬達，諸如散熱風扇馬達、振動馬達等的要求也更 加強調小型化與扁平化。考量將馬達小型化的馬達架 構，一般採用方形外框與圓形旋轉件結合成為單相軸流 式風扇的架構，以達到小型化、扁平化及輸出轉矩提升 的目的。 然而’此種單相軸流式風扇具有啟動死點、轉矩漣 波大、效率低的不良特性，尤其在此小型化馬達輸出轉 矩極小的運作中，極容易因摩擦力與啟動死點的交互作 用，造成啟動不良的問題存在。為了改善單相轴流式風 扇的缺點’遂有三相直流風扇的產生，三相直流風扇具 備了無啟動死點與低轉矩漣波等優異特性。 請參考第一圖。第一圖為傳統三相直流風扇之零件 爆炸圖。在第一圖中’三相直流風扇3主要包括一上繞 線絕緣套筒21 (upper bobbin)、一三相馬達定子1 〇 (three-phase motor stator)、一下繞線絕緣套筒 23 (lower bobbin)、一 電路板 24 (PCB board)、一扇葉 25 (fan leaf)、一主轴 26 (shaft)、一 輛鐵 27 (yoke)、一 環型磁 鐵鐵磁 28 (ring magnet)、一含油軸承 29 (sleeve)、一止 M384244 推片 30 (thrust plate)、一絕緣片 31 (isolation plate)、一 套筒 32 (housing)及一扇座 33 (fan base)。 復參考第一圖。上繞線絕緣套筒21與下繞線絕緣 套筒23其内皆繞設有感應線圈（無標號）並且形成三 相繞組。繞設有三相繞組之上繞線絕緣套筒21與下繞 線絕緣套筒23係套接於三相馬達定子1〇，而成為定子 部分，且三相繞組電連接於電路板24。套接有上繞線 絕緣套筒21與下繞線絕緣套筒23之三相馬達定子10、 電路板24、含油軸承29、止推片30、絕緣片31、套筒 32及扇座33係以緊配合的方式組成。 環形磁鐵28是由複數個永久磁鐵N極、S極交錯 排列包圍而成，軛鐵27則套接於環形磁鐵28外圍並耦 接至主軸26，而成為轉子部分。前述之扇葉25、主軸 26及環形磁鐵28係以緊配合的方式組成。三相直流風 扇3中，定子部分與轉子部份之間存在有一固定寬度之 氣隙。另外，透過定子部分上纏繞導線，配合流過導線 上的電流所產生的定子磁場與轉子部分之環形磁鐵28 產生交互作用’就產生力矩(torque)，帶動扇葉25旋轉。 雖然，傳統三相直流風扇3具備了無啟動死點與低 轉矩途波等優異特性，但是，傳統三相直流風扇3的結 構往往會造成氣流的阻礙，而影響傳統三相直流風扇3 輸出的風量，進而降低傳統三相直流風扇3的效能。 【新型内容】 有鑑於此，本創作提供一種三相軸流式風扇，其 4/16 M384244 藉由結構上的改良’成為扁平化與小型化的轴流式風扇 架構’以提高風扇輸出的風量，並且具備無啟動死點與 低轉矩漣波等優異特性。V. New description: [New technical field] A three-phase axial flow fan, especially a three-phase axial flow fan with three-phase DC control. [Prior Art] With the rapid reduction of the volume of information products, the requirements of motors included in information products, such as heat-dissipating fan motors and vibration motors, have been further enhanced to miniaturization and flattening. Considering the motor frame that is miniaturized by a motor, a square outer frame and a circular rotating member are generally combined to form a single-phase axial flow fan structure to achieve miniaturization, flattening, and output torque enhancement. However, this kind of single-phase axial flow fan has the bad characteristics of starting dead point, large torque ripple and low efficiency, especially in the operation of miniaturized motor with extremely small output torque, it is easy to cause friction and start dead point. The interaction that caused the problem of poor startup exists. In order to improve the shortcomings of the single-phase axial flow fan, the three-phase DC fan has excellent characteristics such as no start dead point and low torque ripple. Please refer to the first figure. The first picture shows the exploded view of the parts of a conventional three-phase DC fan. In the first figure, the 'three-phase DC fan 3 mainly includes an upper bobbin, a three-phase motor stator, and a lower winding insulation sleeve 23 (lower). Bobbin), a circuit board 24, a fan leaf, a spindle 26, a yoke, a ring magnet, an oil bearing 29 (sleeve), a stop M384244 thrust plate 30, an insulation plate 31, a casing 32 and a fan base. Refer to the first figure. The upper winding insulation sleeve 21 and the lower winding insulation sleeve 23 are each provided with an induction coil (not numbered) and form a three-phase winding. A winding insulating sleeve 21 and a lower winding insulating sleeve 23 are wound around the three-phase winding to form a stator portion, and the three-phase winding is electrically connected to the circuit board 24. The three-phase motor stator 10, the circuit board 24, the oil-impregnated bearing 29, the thrust piece 30, the insulating sheet 31, the sleeve 32 and the fan seat 33 of the upper winding insulation sleeve 21 and the lower winding insulation sleeve 23 are sleeved. It consists of a tight fit. The ring magnet 28 is surrounded by a plurality of permanent magnets N and S poles, and the yoke 27 is sleeved around the periphery of the ring magnet 28 and coupled to the main shaft 26 to form a rotor portion. The aforementioned blade 25, the main shaft 26 and the ring magnet 28 are formed in a tight fit. In the three-phase DC fan 3, there is a fixed width air gap between the stator portion and the rotor portion. In addition, by twisting the wire through the stator portion, the stator magnetic field generated by the current flowing through the wire interacts with the ring magnet 28 of the rotor portion to generate a torque, which drives the blade 25 to rotate. Although the conventional three-phase DC fan 3 has excellent characteristics such as no starting dead point and low torque traveling wave, the structure of the conventional three-phase direct current fan 3 tends to cause airflow obstruction and affects the traditional three-phase direct current fan 3 output. The air volume, in turn, reduces the performance of the conventional three-phase DC fan 3. [New content] In view of this, the present invention provides a three-phase axial flow fan, whose 4/16 M384244 is improved in structure to become a flat and miniaturized axial flow fan structure to increase the air volume of the fan output. It also has excellent characteristics such as no start dead point and low torque ripple.
本創作之實施例之二相軸流式風扇，包括一框 架、一三相定子及一風扇，其中，框架具有一中間通孔， 且框架向中間通孔延伸一支持臂，並且支持臂的一端連 接一軸管，且軸管的内部設置一軸承。三相定子設置在 框架上，用以產生一旋轉磁場。風扇具有一中心軸與複 數個磁性扇葉，以及，中心軸設置在軸承中，並且相鄰 的磁性扇葉具有相異的磁極’其中’複數個磁性扇葉與 旋轉磁場作用，而在中間通孔中定位旋轉。 综上所述，本創作之實施例之三相軸流式風扇利 用風扇之複數個磁性扇葉與框架上的三相定子所產生 的旋轉磁場相互作用，以構成三相直流風扇。同時，運 用框架之中間通孔作為氣流流通的管道，以達成軸流式 風扇的目的。The two-phase axial flow fan of the embodiment of the present invention comprises a frame, a three-phase stator and a fan, wherein the frame has an intermediate through hole, and the frame extends a support arm toward the intermediate through hole, and supports one end of the arm A shaft tube is connected, and a bearing is disposed inside the shaft tube. A three-phase stator is placed on the frame to generate a rotating magnetic field. The fan has a central axis and a plurality of magnetic blades, and the central shaft is disposed in the bearing, and the adjacent magnetic blades have different magnetic poles, wherein the plurality of magnetic blades interact with the rotating magnetic field, and Position the rotation in the hole. In summary, the three-phase axial flow fan of the present embodiment interacts with a rotating magnetic field generated by a three-phase stator on the frame by a plurality of magnetic blades of the fan to form a three-phase direct current fan. At the same time, the middle through hole of the frame is used as a conduit for the airflow to achieve the purpose of the axial flow fan.
如此 實施例提供之三相軸流式風扇具備三相 運作無啟動死點、低轉矩漣波及效率提昇等優異特性， 因而能夠有欵地改善傳統單相軸流式風扇具有啟動死 點、?、效率㈣問題。並且’本實施例提供 之二相轴更是藉由結構上的改良，以達到扁平 化與小盤化的目的，以及提高風扇所輪出的風量，提升 sr整因夠有效的改善傳統三相直流風扇輪出 風里/蹩體攻能低的缺點。 5/16 M384244 【實施方式】 請參考第二圖。第二圖為本創作之第一實施例之 三相軸流式風扇分解立體示意圖。第一實施例之三相軸 流式風扇包括有一框架4、一三相定子5及一風扇6。 其中，框架4可以採用方形框架或其他多邊形框架。框 架4的中央部份係開設有一中間通孔40，中間通孔40 - 的面積足以提供風扇6在其内進行旋轉。 -- 框架4的一適當部位向著中間通孔40延伸一支持 . 臂42，支持臂42的一端連接一軸管44，且軸管44的 鲁 内部設置一軸承46。前述的軸管44約略設置在中間通 孔40的中央部位，用來承載風扇6，使風扇6可以在 中間通孔40中定位旋轉，以成為軸流式風扇的架構。 復參考第二圖。三相定子5被設置在框架4非中 間通孔40之位置上，其係具有3xM個極齒52。在第一 實施例中，三相定子5設置在框架4的二邊，並且從框 架4的三個角落向著中間通孔40延伸出三個極齒52， 每'極齒52可以為'T字形極齒。其中^每極齒52 $ 具有一齒腹520與一齒緣522，並且，每一齒腹520上 _ 分別繞設有一感應線圈7，同時，每一齒緣522與風扇 · 6係間隔有一氣隙（未標示）。 — 如此，藉由三個極齒52的配置以及三個感應線圈 7的通電狀態，三相定子5足能夠產生一旋轉磁場，以 帶動風扇6旋轉。前述中，框架4上更設置一控制單元 8，控制單元8耦接於每一感應線圈7，作為感應線圈7 通電狀態的控制。控制單元8可以執行一般業界常用的 6/16 M384244 六步方波換相、漸進式換相、180度方波換相、180度 擬弦波換相、180度梯形波換相或150度12步方波換 相等方式進行相位切換。 復參考第二圖。風扇6具有一中心軸60與2xN個 磁性扇葉62，在第一實施例中，磁性扇葉62採用2個 葉片。風扇6以中心軸60定位設置在軸承46中，並經 由軸承46内徑進行旋轉。另外，風扇6上每一相鄰的 磁性扇葉62各具有相異的磁極（N極或S極），其中， 相異的磁極係設置在每一相鄰的磁性扇葉62的葉緣 620上。如此，在第一實施例中，藉由2個磁極相異的 磁性扇葉62與三相定子5所產生的旋轉磁場的相互作 用，風扇6係能夠在中間通孔40中定位旋轉。 復參考第二圖。第一實施例之三相軸流式風扇還 包括一外框9，外框9係開設有一通風孔90，該通風孔 90對應於框架4之中間通孔40，並且外框9可以與框 架4結合，以保護風扇6。 配合第二圖，請參考第三圖。第三圖為本創作之 第一實施例之三相軸流式風扇組合剖面示意圖。第一實 施例之三相軸流式風扇利用具有複數個磁性扇葉62之 風扇6設置在框架4的中間通孔40，以及三相定子5 設置在框架4並且圍繞風扇6分佈的結構改良，使風扇 6與三相定子5所產生的旋轉磁場相互作用而旋轉，以 帶動大量的氣流流過框架4之中間通孔40。 如此，第一實施例之三相軸流式風扇藉由前述結 構上的改良，係能夠達到扁平化與小型化的目的，以及 提高風扇6所輸出的風量，提升整體效能，因而能夠有 7/16 M384244 效的改善傳統三相直流風扇輸出風量少、整體效能低的 缺點。 配合第二圖，請參考第四圖。第四圖為本創作之 第二實施例之風扇結構示意圖。第二實施例所揭示的風 扇6’與第一實施例之風扇6主要差異處在於：第二實施 例之風扇6’所採用的2個磁性扇葉62’上各具有一相異 的磁極（N極或S極），其中，各相異的磁極分別設置 在每一相鄰的磁性扇葉62’的葉片上。如此，在第二實 施例中，磁性扇葉62 ’與三相定子5所產生的旋轉磁場 的相互作用，風扇6’係能夠在中間通孔40中定位旋轉。 配合第二圖，請參考第五A圖。第五A圖為本創 作之第三實施例之風扇結構示意圖。第三實施例之風扇 6a與第一實施例之風扇6主要差異處在於：第三實施 例之風扇6a採用4個磁性扇葉62，並且風扇6a上每一 相鄰的磁性扇葉62各具有相異的磁極（N極或S極）。 如此，在第三實施例中，藉由磁性扇葉62與三相定子 5所產生的旋轉磁場的相互作用，風扇6a係能夠在中 間通孔40中定位旋轉。 配合第二圖，請參考第五B圖。第五B圖為本創 作之四實施例之風扇結構示意圖。第四實施例所揭示的 風扇6b與第一實施例之風扇6主要差異處在於：第四 實施例之風扇6b採用4個磁性扇葉62’，並且風扇6b 上每一相鄰的磁性扇葉62’各具有相異的磁極（N極或 S極）’其中，相異的磁極係設置在母-相鄰的磁性扇 葉62’的葉片上。如此，在第四實施例中，磁性扇葉62’ 與三相定子5所產生的旋轉磁場的相互作用，風扇6b 8/16 M384244 係能夠在中間通孔40中定^ 請參考第六圖，第少澈* 三相軸流式風扇分解、卷為本創作之第五實施例之 流式風扇包括有一樞架4,'、意圖。第五實施例之三相軸 及一磁鐵200。其中，樞妒一相疋子5’、一風扇100 多邊形框架。框架4，的；」可以採用方形框架或其他 40，，中間通孔40,的面積、部份係開設有一中間通孔 旋轉。 疋以提供風扇100在其内進行 復參考第六圖。三相定 其上設有三相感應線圈7，子5,具有3xM個極齒52，’ 4，，並於三相感應線圈7，、帛’該三相定子5,連接該框架 通孔40,。在第五實施例^電時產生一旋轉磁場於中間 的中間通孔40,位置，赴2三相定子5,設置在框架4’ 間點延伸出三個極齒52,，^樞架4’的二個角落向著中 形極齒。其中，每一槌齒—極齒52’可以為一 T字 522,，並且，每一齒復’具有一齒腹520’與一齒緣 7，，同時，每一齒緣522,血〇上分別繞設有一感應線圈 標示）。 /、礤鐵20〇係間隔有一氣隙（未 復參考第六圖。風屬 數個扇葉104及一扇輪1〇 具有一中心軸承1〇2、複 心軸承102與扇輪]〇6之門複數個扇葉104連接於中 鐵或環形磁鐵200’（參照磁鐵200可以是瓦片形磁 扇輪106以緊配方式或其他七圖同時，磁鐵200與 在中間通孔40’中定位旋轉。 第五實施例之三相軸流式風扇還包括二個固定架 9/16 M384244 9’，每一個固定架9’都具有一固定基座91與至少二個 固定腳92，其中，該些固定基座91分別固定於中心軸 承102之二面，該些至少二個固定腳92則分別固定於 框架4’之二面。如此，二個固定架9’可以用來承載風 扇100，使風扇100可以在中間通孔40’中定位旋轉， 以成為軸流式風扇的架構。 前述中，框架4’上更設置一控制單元8’，控制單 元8’耦接於三相感應線圈7’，作為三相感應線圈7’通 電狀態的控制。控制單元8’可以執行一般業界常用的六 步方波換相、漸進式換相、180度方波換相、180度擬 弦波換相、180度梯形波換相或150度12步方波換相 等方式進行相位切換。 综上所述，本創作之三相軸流式風扇利用風扇之 複數個磁性扇葉與框架上的三相定子所產生的旋轉磁 場相互作用，以構成三相直流風扇。同時，運用框架之 中間通孔作為氣流流通的管道，以達成軸流式風扇的目 的。 如此，本創作提供之三相軸流式風扇具備三相運 作無啟動死點、低轉矩漣波及效率提昇等優異特性，因 而能夠有效地改善傳統單相軸流式風扇具有啟動死 點、轉矩漣波大、效率低的問題。並且，本創作提供之 三相軸流式風扇更是藉由結構上的改良，以達到扁平化 與小型化的目的，以及提高風扇所輸出的風量，提升整 體效能，因而能夠有效的改善傳統三相直流風扇輸出風 量少、整體效能低的缺點。 惟，以上所述，僅為本創作最佳之一的具體實施 10/16 M384244 例之詳細說明與圖式，任何熟悉該項技藝者在本創作之 領域内，可輕易思及之變化或修飾皆可涵蓋在以下本案 之專利範圍。 【圖式簡單說明】 第一圖為傳統三相直流風扇之零件爆炸圖； 第二圖為本創作之第一實施例之三相軸流式風扇分 解立體示意圖； 第三圖為本創作之第一實施例之三相軸流式風扇組 合剖面示意圖； 第四圖為本創作之第二實施例之風扇結構示意圖； 第五A圖為本創作之第三實施例之風扇結構示意圖； 第五B圖為本創作之第四實施例之風扇結構示意圖； 第六圖為本創作之第五實施例之三相軸流式風扇分 解立體示意圖；及 第七圖為本創作之環形磁鐵示意圖。 【主要元件符號說明】 習知： 三相馬達定子10 上繞線絕緣套筒21 下繞線絕緣套筒23 電路板24 扇葉25 11/16 M384244 主軸26 軛鐵27 環型磁鐵鐵磁28 含油軸承29 三相直流風扇3 止推片30 絕緣片31 套筒32 扇座33 本創作： 框架4、4’ 中間通孔40、40’ 支持臂42 軸管44 軸承46、102 三相定子5、5’ 極齒52、52， 齒腹 520、520’ 齒緣 522、522’ 風扇 6、6’、6a、6b、100 扇葉104 扇輪106 12/16 M384244 中心軸60 磁性扇葉62、62’ 葉緣620 感應線圈7、7 控制單元8、8’ 外框9 通風孔90 固定架9’ 固定基座91 固定腳92 磁鐵200 環形磁鐵200’The three-phase axial flow fan provided by the embodiment has excellent characteristics such as three-phase operation without start dead point, low torque ripple and efficiency improvement, so that the conventional single-phase axial flow fan can be improved to have a starting dead point. And efficiency (four) issues. And the two-phase shaft provided by the embodiment is improved by the structure to achieve the purpose of flattening and small-disc, and to increase the air volume of the fan, and to improve the sr factor to effectively improve the conventional three-phase. The shortcoming of the DC fan wheel in the wind / body attack energy is low. 5/16 M384244 [Embodiment] Please refer to the second figure. The second figure is an exploded perspective view of the three-phase axial flow fan of the first embodiment of the present invention. The three-phase axial fan of the first embodiment includes a frame 4, a three-phase stator 5, and a fan 6. Among them, the frame 4 can adopt a square frame or other polygonal frame. The central portion of the frame 4 defines an intermediate through hole 40 having an area sufficient to provide rotation of the fan 6 therein. - A suitable portion of the frame 4 extends toward the intermediate through hole 40. The arm 42 has one end of the support arm 42 connected to a shaft tube 44, and a bearing 46 is disposed inside the shaft tube 44. The aforementioned shaft tube 44 is disposed approximately at the center of the intermediate through hole 40 for carrying the fan 6, so that the fan 6 can be positioned and rotated in the intermediate through hole 40 to become the structure of the axial flow fan. Refer to the second figure. The three-phase stator 5 is disposed at a position of the frame 4 other than the intermediate through hole 40, which has 3 x M pole teeth 52. In the first embodiment, the three-phase stator 5 is disposed on both sides of the frame 4, and three pole teeth 52 are extended from the three corners of the frame 4 toward the intermediate through hole 40, and each 'pole tooth 52 may be 'T-shaped Extremely toothed. Wherein, each pole tooth 52 $ has a tooth 520 and a tooth edge 522, and each of the tooth 520 is disposed with an induction coil 7 respectively, and each tooth edge 522 is spaced apart from the fan 6 system. Gap (not labeled). Thus, by the arrangement of the three pole teeth 52 and the energization state of the three induction coils 7, the three-phase stator 5 is capable of generating a rotating magnetic field to drive the fan 6 to rotate. In the foregoing, a control unit 8 is further disposed on the frame 4, and the control unit 8 is coupled to each of the induction coils 7 as a control for the energization state of the induction coil 7. The control unit 8 can perform 6/16 M384244 six-step square wave commutation, progressive commutation, 180 degree square wave commutation, 180 degree sine wave commutation, 180 degree trapezoidal wave commutation or 150 degree 12 commonly used in the industry. Step wave is switched in equal mode for phase switching. Refer to the second figure. The fan 6 has a central shaft 60 and 2 x N magnetic blades 62. In the first embodiment, the magnetic blades 62 employ two blades. The fan 6 is positioned in the bearing 46 with a central shaft 60 and is rotated by the inner diameter of the bearing 46. In addition, each adjacent magnetic fan blade 62 on the fan 6 has a different magnetic pole (N pole or S pole), wherein different magnetic poles are disposed at the leaf edge 620 of each adjacent magnetic blade 62. on. Thus, in the first embodiment, the fan 6 can be positioned and rotated in the intermediate through hole 40 by the interaction of the two magnetic poles 62 having different magnetic poles and the rotating magnetic field generated by the three-phase stator 5. Refer to the second figure. The three-phase axial flow fan of the first embodiment further includes an outer frame 9 , and the outer frame 9 defines a ventilation hole 90 corresponding to the intermediate through hole 40 of the frame 4 , and the outer frame 9 can be combined with the frame 4 . Combined to protect the fan 6. For the second picture, please refer to the third picture. The third figure is a schematic cross-sectional view of the three-phase axial flow fan assembly of the first embodiment of the present invention. The three-phase axial flow fan of the first embodiment is provided in the intermediate through hole 40 of the frame 4 by the fan 6 having a plurality of magnetic blades 62, and the structure in which the three-phase stator 5 is disposed in the frame 4 and distributed around the fan 6, The fan 6 is rotated in interaction with the rotating magnetic field generated by the three-phase stator 5 to drive a large amount of airflow through the intermediate through hole 40 of the frame 4. As described above, the three-phase axial flow fan of the first embodiment can achieve the purpose of flattening and miniaturization by the above-described structural improvement, and can improve the air volume outputted by the fan 6 and improve the overall performance, thereby enabling 7/. 16 M384244 improves the shortcomings of traditional three-phase DC fans with low output air volume and low overall performance. For the second picture, please refer to the fourth picture. The fourth figure is a schematic view of the structure of the fan of the second embodiment of the present invention. The main difference between the fan 6' disclosed in the second embodiment and the fan 6 of the first embodiment is that the two magnetic blades 62' used in the fan 6' of the second embodiment each have a different magnetic pole ( N pole or S pole), wherein different magnetic poles are respectively disposed on the blades of each adjacent magnetic blade 62'. Thus, in the second embodiment, the interaction of the magnetic blade 62' with the rotating magnetic field generated by the three-phase stator 5 allows the fan 6' to be positioned to rotate in the intermediate through hole 40. For the second picture, please refer to Figure 5A. Fig. 5A is a schematic view showing the structure of a fan of the third embodiment of the present invention. The fan 6a of the third embodiment is mainly different from the fan 6 of the first embodiment in that the fan 6a of the third embodiment employs four magnetic blades 62, and each adjacent magnetic blade 62 on the fan 6a has each Different magnetic poles (N pole or S pole). Thus, in the third embodiment, the fan 6a can be positioned and rotated in the intermediate through hole 40 by the interaction of the magnetic blade 62 with the rotating magnetic field generated by the three-phase stator 5. For the second picture, please refer to the fifth picture B. Fig. 5B is a schematic view showing the structure of the fan of the fourth embodiment of the present invention. The fan 6b disclosed in the fourth embodiment is mainly different from the fan 6 of the first embodiment in that the fan 6b of the fourth embodiment employs four magnetic blades 62', and each adjacent magnetic blade on the fan 6b 62' each have a different magnetic pole (N pole or S pole) 'where the distinct magnetic poles are disposed on the blades of the mother-adjacent magnetic blade 62'. Thus, in the fourth embodiment, the interaction of the magnetic blade 62' with the rotating magnetic field generated by the three-phase stator 5, the fan 6b 8/16 M384244 can be fixed in the intermediate through hole 40. Please refer to the sixth figure. The third embodiment of the three-phase axial fan decomposition, the flow-type fan of the fifth embodiment includes a pivot 4, ', intended. The three-phase shaft of the fifth embodiment and a magnet 200. Among them, the pivoting one-phase dice 5', one fan 100 polygonal frame. The frame 4, "; can be a square frame or other 40, the intermediate through hole 40, the area, the part is opened with an intermediate through hole rotation.疋 to provide the fan 100 therein for reference to the sixth figure. The three-phase stator is provided with a three-phase induction coil 7, a sub-5 having 3xM pole teeth 52, '4, and a three-phase induction coil 7, 帛' the three-phase stator 5, connecting the frame through-hole 40, . In the fifth embodiment, when a power is generated, a rotating magnetic field is generated in the middle of the intermediate through hole 40, and the position is taken to the two-phase three-phase stator 5. The three pole teeth 52 are extended between the frames 4', and the pivot 4' The two corners face the middle pole. Wherein, each of the molar-tooth teeth 52' may be a T-shape 522, and each tooth has a tooth 520' and a tooth edge 7, and at the same time, each tooth edge 522, on the bloody side Each is provided with an induction coil mark). /, 礤铁20〇 is separated by an air gap (not refer to the sixth picture. Wind belongs to several blades 104 and one wheel 1〇 has a center bearing 1〇2, recirculation bearing 102 and fan wheel]〇6 The plurality of blades 104 are connected to the middle iron or the ring magnet 200' (the reference magnet 200 may be a tile-shaped magnetic fan wheel 106 in a tight fit manner or other seven figures, and the magnet 200 is positioned in the intermediate through hole 40' The three-phase axial flow fan of the fifth embodiment further includes two fixing frames 9/16 M384244 9', each of which has a fixed base 91 and at least two fixing legs 92, wherein The fixing bases 91 are respectively fixed on two sides of the center bearing 102, and the at least two fixing legs 92 are respectively fixed on two sides of the frame 4'. Thus, the two fixing frames 9' can be used to carry the fan 100, so that The fan 100 can be rotated in the middle through hole 40' to become the structure of the axial flow fan. In the foregoing, the frame 4' is further provided with a control unit 8', and the control unit 8' is coupled to the three-phase induction coil 7'. As a control of the energization state of the three-phase induction coil 7'. The control unit 8' can Perform six-step square wave commutation, progressive commutation, 180 degree square wave commutation, 180 degree sine wave commutation, 180 degree trapezoidal wave commutation or 150 degree 12 step square wave commutation commonly used in the industry. In summary, the three-phase axial fan of the present invention uses a plurality of magnetic blades of the fan to interact with a rotating magnetic field generated by a three-phase stator on the frame to form a three-phase DC fan. The middle through hole acts as a conduit for the airflow to achieve the purpose of the axial flow fan. Thus, the three-phase axial flow fan provided by the present invention has excellent characteristics such as three-phase operation without start dead point, low torque ripple and efficiency improvement. Therefore, the conventional single-phase axial flow fan can effectively improve the problem of starting dead point, large torque ripple, and low efficiency. Moreover, the three-phase axial flow fan provided by the present invention is improved by structure. In order to achieve the purpose of flattening and miniaturization, as well as to increase the air volume output by the fan and improve the overall efficiency, it can effectively improve the output air volume of the traditional three-phase DC fan and the overall efficiency. Disadvantages. However, as mentioned above, it is only one of the best implementations of this creation. The detailed description and drawings of the 10/16 M384244 example can be easily considered by any person familiar with the art in the field of this creation. Variations or modifications can be covered in the following patents of this case. [Simplified illustration] The first figure is the exploded view of the parts of the traditional three-phase DC fan; the second picture is the three-phase axial flow of the first embodiment of the creation. The third embodiment is a cross-sectional view of the three-phase axial flow fan of the first embodiment of the present invention; the fourth figure is a schematic diagram of the fan structure of the second embodiment of the present invention; FIG. 5 is a schematic view showing the structure of a fan according to a fourth embodiment of the present invention; and FIG. 6 is an exploded perspective view showing the three-phase axial flow fan according to the fifth embodiment of the present invention; The seventh picture is a schematic diagram of the ring magnet of the creation. [Main component symbol description] Convention: Three-phase motor stator 10 Winding insulation sleeve 21 Lower winding insulation sleeve 23 Circuit board 24 Blade 25 11/16 M384244 Spindle 26 Yoke 27 Ring magnet Ferromagnetic 28 Oily Bearing 29 three-phase DC fan 3 thrust plate 30 insulation sheet 31 sleeve 32 fan seat 33 This creation: frame 4, 4' intermediate through hole 40, 40' support arm 42 shaft tube 44 bearing 46, 102 three-phase stator 5, 5' pole tooth 52, 52, flank 520, 520' tooth edge 522, 522' fan 6, 6', 6a, 6b, 100 blade 104 fan wheel 106 12/16 M384244 central axis 60 magnetic blade 62, 62 'Leave edge 620 induction coil 7, 7 control unit 8, 8' outer frame 9 ventilation hole 90 fixing bracket 9' fixing base 91 fixing foot 92 magnet 200 ring magnet 200'
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