200901602 九、發明說明： 【發明所屬之技術領域】 本發明是關於一種步進馬達，特別是一種定子具遠端 成對輔助磁極之步進馬達。 5【先前技術】 步進馬達由於可被程式化精密控制，在許多領域中已 被廣泛接納應用，例如事務機器、精密機械、機動車輛用 儀表及部件、自動啟閉門窗或其他自動控制設備等，無論 型恶為何，都展現比傳統馬達更精確優秀的效能。如圖工 10所示美國第6,043,574號專利之内轉子步進馬達，其定子 具有複數呈「M」型之鐵芯12、14，在「M」型鐵芯 12、14之中央柱丨22、142上套設線圈組124、144，當致 能線圈組144時，中央柱142接近永磁轉子16端會开^成 例如一 N磁極，磁力線並經由矽鋼材質之鐵芯14，在左 右兩磁靴146、148面向轉子16端形成相反的8極，從而 吸引或排斥轉子16上的對應磁極，驅動轉子16繞樞軸旋 轉。而各「M」型鐵芯12、14設置之爽角，則需與永磁 式轉子16的磁極錯開，亦即，當鐵芯14正對轉子之—磁 極時，另-鐵芯則並未正對轉子之任一磁極，而是面 20 向磁極間之緩衝區。 但如圖2所不’由於定子實際具有八處突出部，各突 出部間隔45度，而轉子具有十個磁極，各磁極間距為36 度，因此，中央柱U2與磁鞋146、148之㈣其實q 於轉子之磁極間距，並未完全對應；亦即，當「Mj型鐵 5 200901602 4 14之中央柱142對準轉子磁極時，磁辄146、丨48分別 偏離對應轉子磁極9度，更向外側的鐵芯丨2及外加定子 磁軛，則分別偏離18度（恰位於兩轉子磁極間）、及9度， 由於各定子磁軛均非正對轉子磁極，不僅分別使能量運用 5效率被大打折扣，而且所導引出的磁力將產生不必要的側 向刀里。依照上述結構，當轉子磁極磁力達9〇〇 ， 驅動電流為30安培時，其轉矩為3 56xl〇-6mN_m。 而个，不新尘創作八刀乐川 10 號新型專利如圖3所示，該新型揭露定子具兩辅助磁軛部 之步進馬達’主要包含一轉子22及一定子2。在該新型 創作令，轉子22係選擇一 18極轉子，其N、S磁極兩兩 間隔地沿一樞軸放射狀設置於面向轉子22外側，因 圖式及計算過程中，每一磁極約佔2(Γ⑽W。）。 15 20 乂 i之疋子2 D又置有兩主磁軛部26、兩辅助磁軛部 Γ7磁阻奴24 ’主磁軛部26與辅助磁軛部28的相 磁輛部％與轉子樞軸2G之連線，及辅助磁乾 〜？樞軸2G連線夾—鈍角’·兩主磁㈣26對應 S極士Μ之磁極不同，當主磁輕部％之一對應轉子咖或 =’另—主_部_對應轉子22之心極間之 、、羡衝£。依昭緣安 + 磁輕部-同SI針：不僅同—組之主磁輛部與辅助 於辅助^ ’使得料利效率較高；更 線，辅助增加磁能之運用效率以之磁力 部間夾-㈣古羊，尤其辅助磁輛部與主磁軛 、減少轉子之偏振，讓轉子樞軸相關零 6 200901602 件壽命得以延長。 然而，當步進馬達體積逐漸微型化，轉子及定子尺寸 都需減小，每一轉子磁極所對應之弧長隨之縮短，亦即， *主磁軛部係由一本體及一磁靴所構成時，本體及磁靴間 5距亦隨之減小’若仍想維持原有之線圈尺寸，將在製造方 面產生困擾，但減少匝數勢必削弱磁力。 ，因此，在不縮減線圈尺寸前提下，主磁輕部之結構必 /頁作§1更’才能容許維持原尺寸之線圈順利套入本體 中，且輔助磁輛部亦有些許變化，以提供減振效果，延長 10 產品壽命。 【發明内容】 因此，本發明之一目的，在提供一種擴大主磁極盘辅 助磁極間距比例，容許整體體積能更微型化的步進馬達。 本發明之另一目的，在提供一種藉由辅助磁極鱼轉子 U磁極之感應，減低偏心振動、使運轉更寧靜的步進馬達。 明之再-目的’在提供_種可減少振動摩擦、提 升能量運用效能的步進馬達。 本4月之X目的’在提供一種減少枢轴相關部件盔 謂磨耗，運作年限得以延長的步進馬達。 . 人本發明的疋子具遠端成對輔助磁極之步進馬達，包 含：—供沿一樞軸旋轉之轉子’具有複數沿該樞軸徑向設 於_子表面、且相㈣魏相反之磁極，各該磁極間距 相寻；-與該轉子共圓心且間隔—氣隙之定子，包括.二 分別具有-本體、及一套設於該本體之線圈組之主磁極； 20 200901602 ' 及二分別對應該等主磁極、並與該等主磁極夾一對應奇數 轉子磁極間距之近主磁極輔助磁極；及二分別與該近主磁 極輔助磁極成對配置、並夾對應一轉子磁極間距之遠主磁 極輔助磁極。 5 藉由成對輔助磁極的配置，不僅使磁能得以充分利 用’且在成對輔助磁極可與轉子磁極間相互感應吸引，此 吸引力與主磁極合力矩相加乘、合力相抵銷狀況下，可降 低耗能、提升轉子旋轉效率、且在未致能時增加轉子穩定 性；反之，可減少偏斜吸引力，降低振動耗能及隨之而來 10對於軸承部分之摩擦；另因定子内部空間配置，使微型步 進馬達之線圈組的安裝更加順暢，充分達到發明的目的。 【實施方式】 有關本發明之技術内容、特點與功效，配合下列參考 圖式所示較佳貫施例及其詳細說明，將可清楚的呈現。此 15外在各實施例中，相同之元件將以相似之標號標示。 如圖4所示，本發明揭露之定子具遠端成對輔助磁極 之步進馬達，主要包含一轉子3及一定子5,兩者以氣隙 相隔且共圓心。本實施例中，轉子3以—^ 2磁極轉子 為例，其N、S磁極兩兩間隔地沿一樞轴放射狀設置於面 20向轉子3外側，因此在圖式中，每一磁極約佔3〇。（36〇。 /12=30。）。 本例之疋子具兩本體5〇、兩成對輔助磁極及一高磁 ，段6,兩本體50各套置有線圈組以以提供致能能量， 藉此形成兩主磁極54，成對之輔助磁極則因與主磁極Μ 8 200901602 之位置關係为別有近主磁極辅助磁極56及遠主磁極輔助 磁極58，主磁極54與遠主磁極輔助磁極58的相互關係 為主磁極54與轉子樞軸3〇之連線，及遠主磁極辅助磁極 58與轉子樞軸30連線夾一純角；兩主磁極54對應轉子 5 .磁極32不同步，例如當主磁極54之一對應轉子3的N或 S極時，另一主磁極則對應轉子3之^^與s極間之緩衝區， 藉此在輪流致能兩線圈組52時，轉子3得以順利轉動， 高磁阻段6之於定子5製作時成形，形成減少磁能逸散之 空氣空間。 1〇 如圖5所示，致能線圈組52所生之磁力線，主要分 佈如粗虛線55所示，會在主磁極54處產生對於轉子磁極 之強大吸引力，從而造成如圖6所示偏向之吸引力。 但當設置有本發明中之成對辅助磁極56、58後，輔助吸 引轉子磁極32,從而感應產生如同細虛線57所示磁力線 B分佈’因巾分布於定？ 5周圍及成對之輔助磁極迴路。依 照圖2之相同環境條件下進行實驗，此時，轉子磁極仍為 9〇〇 Gauss,流經線圈之電流亦為3〇安培，此時之轉矩升 尚為5.86xl〇-6mN_m，明顯較圖2結構提升約6〇%。 經由本案結構，轉子除受原磁力F1之吸引；面對成 20對輔助磁極之轉子磁極32亦受近主磁極輔助磁極％、及 遠主磁極輔助磁極58之合力吸力F2吸引，兩吸引力之合 力為F3 ;由於「主磁極與轉子樞軸連線」和「遠主磁極 輔助磁極與轉子樞軸連線」之夾角0為鈍角，使得F2會 存在與F1相抵銷之反向分量，合力们因而小於原本。 200901602 此即意謂，由合力所造 動 成之轉子早方向磁吸情況減輕，振 ^減小、軸承磨耗減緩、馬達壽命從而增長。 方由於F1所造成之力矩與1"2所造成之力矩同 方向（例如均為順時針方 ^ 5 Η所造成之力矩，即使二 增大，超過原本 使致此之能量大小相同，轉子轉動 仍因而更有效率。為證明此推論， 別以傳场盔結乂驗也上述霄施例之構思，本發明創作人分 極之步進馬達兩個模_ = 本創作具成對輔助磁 10 況取得X、Y、Z三軸:::析’分別以通電、不通電狀 -軸向之力矩量。數據顯示，在無辅助 Τ ’即便改選擇轉子磁極為UOGGa㈣者，並维 15 m肖本㈣構所造奴合力矩相較，僅為 案、、.D構67%效能。亦即，依照本案揭露，有輔助磁極的 ^進馬達表料實優於傳統步進馬達或沒有辅助磁極 ^另在兩者處於未通電狀科，z軸取得之數據亦顯示 本發明創作具有可更有效保持轉子位置之優勢。 此外’因主磁極54與近主磁極辅助磁極％之相對間 隔擴大’使得線圈組52可輕易於步進馬達製財，以自 動化機具套設安裝於本體50上，絲毫不受定子尺寸微型 化之干擾，使步進馬達的微型化更進一步實現。 本發明之結構除適用於如上述實施例之具12磁極之 轉子’亦能將概念應用於多磁極轉子之步進馬達，如圖7 所示之本發明實施例二’定子5,設置在轉子3’外側，兩者 20 200901602 5 間隔-氣隙4,，定子5,具有兩本體5〇,及—高磁阻段f， 本體貨套設有線圈組52，，轉子3,具有二十個交錯磁極， 兩主磁極54,所對應之轉子磁極32，不同，當―主磁極从 對應轉子磁極32,之-時，另—主磁㈣對應轉子磁極”, 之緩衝區；主磁極54,與遠主磁極辅助磁極％，維持爽一純 角，藉以有效利用輔助磁極受轉子磁極感應之吸引力，以 減少偏心之合力’從而減弱轉子之偏振旋轉。 15 當然，如熟於此技者所能輕易理解，本發明之結構並 非褐限於内轉子馬達，亦可輕易轉換至外轉子馬達，故如 1〇圖8所示’定子5”設置在外轉子3”中，兩者間隔一氣隙 4”，定子5”具有兩本體5〇”及一高磁阻段6”，兩線圈組 52”各自套設於本體5〇”之上提供致能能量，外轉子具 有十二個交錯磁極，兩主磁極54”所對應之外轉子磁極Μ” 不同，當一主磁極54”對應外轉子磁極32，，時，另一主磁 極則對應外轉子磁極32”之緩衝區；主磁極54，，與遠主磁 極輔助磁極58”仍維持夾—鈍角，藉以有效減少偏心之合 力、及所造成之振動與磨耗。 20 J·隹以上所述者’僅為本發明之較佳實施例而已，當不 月b以此限定本發明實施之範圍，即大凡依本發明申請專利 乾圍及發明說明書内容所作之簡單的等效變化與修飾，皆 應仍屬本發明專利涵蓋之範圍内。BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a stepping motor, and more particularly to a stepping motor in which a stator has a pair of auxiliary magnetic poles at a distal end. 5 [Prior Art] Since the stepper motor can be programmed and controlled, it has been widely accepted in many fields, such as transaction machines, precision machinery, instruments and components for motor vehicles, automatic opening and closing doors and windows or other automatic control equipment. Regardless of the type of evil, it shows more accurate and superior performance than traditional motors. In the rotor stepping motor of U.S. Patent No. 6,043,574, the stator of the present invention has a plurality of "M" type cores 12 and 14 and a central column 22 of the "M" type cores 12, 14. The coil set 124, 144 is sleeved on the 142. When the coil set 144 is enabled, the central post 142 is close to the end of the permanent magnet rotor 16 and is opened, for example, by an N magnetic pole, and the magnetic lines of force are passed through the iron core 14 of the silicon steel material. The shoes 146, 148 form opposite poles 8 toward the end of the rotor 16 to attract or repel corresponding poles on the rotor 16 and drive the rotor 16 to pivot. The refreshing angle of each of the "M" cores 12, 14 needs to be shifted from the magnetic pole of the permanent magnet rotor 16, that is, when the core 14 is facing the magnetic pole of the rotor, the other core is not It is facing any magnetic pole of the rotor, but a buffer between the faces 20 and the magnetic poles. However, as shown in FIG. 2, since the stator actually has eight protrusions, each protrusion is separated by 45 degrees, and the rotor has ten magnetic poles, and the pitch of each pole is 36 degrees. Therefore, the central column U2 and the magnetic shoes 146, 148 (4) In fact, the magnetic pole spacing of q in the rotor does not correspond exactly; that is, when the central column 142 of the Mj-type iron 5 200901602 4 14 is aligned with the rotor magnetic pole, the magnetic 辄 146 and 丨 48 respectively deviate from the corresponding rotor magnetic pole by 9 degrees, The outer core 丨 2 and the external stator yoke are respectively offset by 18 degrees (just between the two rotor poles) and 9 degrees. Since each stator yoke is not facing the rotor magnetic pole, not only the energy is utilized 5 efficiency, respectively. It is greatly discounted, and the magnetic force that is guided will generate unnecessary lateral knives. According to the above structure, when the rotor magnetic force reaches 9 〇〇 and the driving current is 30 amps, the torque is 3 56xl 〇-6mN_m. As shown in FIG. 3, the new type of stepping motor of the stator with two auxiliary yoke portions mainly includes a rotor 22 and a stator 2. In the new type. Creation order, the rotor 22 selects an 18 pole In the rotor, the N and S magnetic poles are radially disposed on the outer side of the rotor 22 along a pivot. Because of the pattern and calculation process, each magnetic pole occupies about 2 (Γ(10)W.) 15 20 乂i 疋子2 D is further provided with two main yoke portions 26, two auxiliary yoke portions Γ7 magnetic resistance slaves 24' main yoke portion 26 and the auxiliary magnetic yoke portion 28 of the phase magnetic portion % and the rotor pivot 2G, and Auxiliary magnetic dry ~? Pivot 2G connection clip - obtuse angle '·Two main magnetic (four) 26 corresponding to S poles, the magnetic pole is different, when one of the main magnetic light parts corresponds to the rotor coffee or = 'other - main _ part _ corresponding rotor The heart of the heart of the 22, the 羡 £ £. 依 缘 缘 + 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁 磁Auxiliary to increase the efficiency of the application of magnetic energy, the magnetic part between the clamps - (four) ancient sheep, especially the auxiliary magnetic part and the main yoke, reduce the polarization of the rotor, so that the rotor pivot correlation zero 6 200901602 pieces life is extended. However, when stepping The size of the motor is gradually miniaturized, the size of the rotor and the stator are reduced, and the arc length corresponding to the magnetic pole of each rotor is shortened, that is, * When the main yoke part is composed of a main body and a magnetic shoe, the distance between the main body and the magnetic shoe is also reduced. 'If you still want to maintain the original coil size, it will cause trouble in manufacturing, but reduce 匝The number will weaken the magnetic force. Therefore, under the premise of not reducing the size of the coil, the structure of the main magnetic light part must be § 1 or more to allow the coil of the original size to be smoothly inserted into the body, and the auxiliary magnetic part is also somewhat The present invention provides a stepping motor that expands the ratio of the auxiliary magnetic pole pitch of the main magnetic pole to allow the overall volume to be more miniaturized. Another object of the present invention is to provide a stepping motor that reduces the eccentric vibration and makes the operation quieter by the induction of the magnetic pole of the auxiliary magnetic pole fish rotor U. The re-purpose of the Ming is to provide a stepping motor that can reduce vibration friction and improve energy utilization efficiency. This X-X goal in April provides a stepper motor that reduces the wear of the pivot-related parts and extends the operating life. The tweezers of the present invention have a distal end paired auxiliary magnetic pole stepping motor, comprising: - a rotor for rotating along a pivot having a plurality of radial surfaces disposed on the _ subsurface along the pivot axis, and the phase (four) Wei opposite a magnetic pole, each of which is contiguous with the magnetic pole; a stator having a center and a space-interval with the rotor, comprising two main bodies having a body and a set of coils disposed on the body; 20 200901602 ' and Two respectively corresponding to the main magnetic pole, and the main magnetic poles of the main magnetic poles are adjacent to the main magnetic pole auxiliary magnetic poles; and two are respectively arranged in pairs with the near main magnetic pole auxiliary magnetic poles, and corresponding to a rotor magnetic pole spacing Far main magnetic pole auxiliary magnetic pole. 5 By the arrangement of the pair of auxiliary magnetic poles, not only the magnetic energy can be fully utilized, but also the pair of auxiliary magnetic poles can be inductively attracted to the magnetic poles of the rotor, and the attraction force is multiplied by the main magnetic poles and the resultant force is offset. , can reduce energy consumption, improve rotor rotation efficiency, and increase rotor stability when not enabled; conversely, can reduce the deflection attractive force, reduce the vibration energy consumption and the subsequent friction of the bearing part; The internal space configuration makes the installation of the coil set of the micro stepping motor smoother and fully achieves the purpose of the invention. [Embodiment] The technical contents, features, and effects of the present invention will be apparent from the following description of the preferred embodiments and the detailed description thereof. In the various embodiments, the same elements will be designated by like reference numerals. As shown in FIG. 4, the stepping motor of the stator with the distal end paired auxiliary magnetic poles disclosed in the present invention mainly comprises a rotor 3 and a stator 5, which are separated by an air gap and are concentric. In the present embodiment, the rotor 3 is exemplified by a magnetic pole rotor, and the N and S magnetic poles are radially disposed on the outer side of the rotor 20 along a pivot axis, so in the figure, each magnetic pole is about Accounted for 3〇. (36〇. /12=30.). The dice of this example has two bodies 5 〇, two pairs of auxiliary magnetic poles and one high magnetic field, and the two bodies 50 are respectively provided with coil sets to provide energizing energy, thereby forming two main magnetic poles 54, paired The auxiliary magnetic pole has a near main magnetic pole auxiliary magnetic pole 56 and a far main magnetic pole auxiliary magnetic pole 58 due to the positional relationship with the main magnetic pole Μ 8 200901602, and the relationship between the main magnetic pole 54 and the far main magnetic pole auxiliary magnetic pole 58 is the main magnetic pole 54 and the rotor. The connection of the pivot 3〇, and the far main magnetic pole auxiliary magnetic pole 58 and the rotor pivot 30 are clamped to a pure angle; the two main magnetic poles 54 correspond to the rotor 5. The magnetic poles 32 are not synchronized, for example, when one of the main magnetic poles 54 corresponds to the rotor 3 At the N or S pole, the other main magnetic pole corresponds to the buffer between the ^^ and s poles of the rotor 3, whereby the rotor 3 is smoothly rotated when the two coil groups 52 are alternately enabled, and the high magnetoresistive section 6 Formed at the time of fabrication of the stator 5 to form an air space that reduces magnetic energy dissipation. As shown in FIG. 5, the magnetic lines of force generated by the enabling coil group 52, mainly distributed as indicated by the thick broken line 55, produce a strong attraction to the magnetic pole of the rotor at the main magnetic pole 54, thereby causing a bias as shown in FIG. The attraction. However, when the pair of auxiliary magnetic poles 56, 58 of the present invention are provided, the rotor magnetic poles 32 are auxiliaryly attracted, thereby inducing a distribution of the magnetic flux lines B as shown by the thin broken lines 57. 5 surrounding and paired auxiliary magnetic pole circuits. The experiment was carried out under the same environmental conditions as in Fig. 2. At this time, the rotor magnetic pole was still 9〇〇Gauss, and the current flowing through the coil was also 3〇 Amperes. At this time, the torque rise was 5.86xl〇-6mN_m, which was significantly better. The structure of Figure 2 is increased by approximately 6%. According to the structure of the present invention, the rotor is attracted by the original magnetic force F1; the rotor magnetic pole 32 facing 20 pairs of auxiliary magnetic poles is also attracted by the close main magnetic pole auxiliary magnetic pole %, and the combined force of the far main magnetic pole auxiliary magnetic poles F2, two attractive The resultant force is F3; because the angle between the "main magnetic pole and rotor pivot connection" and the "far main magnetic pole auxiliary magnetic pole and the rotor pivot connection" is an obtuse angle, F2 will have the opposite component of the offset with F1. They are therefore smaller than the original. 200901602 This means that the rotor in the early direction of the rotor is reduced by the combined force, the vibration is reduced, the bearing wear is slowed down, and the motor life is increased. The torque caused by F1 is the same as the moment caused by 1"2 (for example, the moment caused by clockwise square ^ 5 ,, even if the second increase, the energy is the same as the original, the rotor rotates still Therefore, it is more efficient. In order to prove this inference, the concept of the above-mentioned embodiment is not to be considered by the passing helmet. The creator of the present invention has two modes of stepping motor _ = the creation of the pair of auxiliary magnetic 10 X, Y, Z three axes::: Analysis of the amount of torque in the energized, non-energized-axial direction. The data shows that in the absence of auxiliary Τ 'even if the rotor magnetic pole is UOGGa (four), and the dimension is 15 m Xiaoben (four) Compared with the case, the construction and the slave torque are only 67% of the efficiency of the case and the .D. That is, according to the disclosure of the present invention, the motor with the auxiliary magnetic pole is superior to the conventional stepping motor or the auxiliary magnetic pole. The data obtained by the z-axis also shows that the invention has the advantage of more effectively maintaining the rotor position. In addition, 'the relative spacing between the main magnetic pole 54 and the near main magnetic pole auxiliary magnetic pole is expanded', so that the coil assembly 52 can be easily made by stepper motor The automatic tool set is mounted on the body 50, and is not interfered by the miniaturization of the stator size, so that the miniaturization of the stepping motor is further realized. The structure of the present invention is applicable to the rotor with 12 magnetic poles as in the above embodiment. 'The concept can also be applied to a stepping motor of a multi-pole rotor, as shown in Fig. 7, the second embodiment of the present invention, the stator 5, disposed outside the rotor 3', both 20 200901602 5 interval - air gap 4, stator 5, having two bodies 5 〇, and - high magnetoresistive section f, the body cargo cover is provided with a coil set 52, the rotor 3, having twenty staggered magnetic poles, two main magnetic poles 54, corresponding rotor poles 32, different, When the "main magnetic pole is from the corresponding rotor magnetic pole 32, the other - the main magnetic (four) corresponds to the rotor magnetic pole", the buffer; the main magnetic pole 54, and the far main magnetic pole auxiliary magnetic pole %, maintain a cool pure angle, thereby effectively utilizing the auxiliary The magnetic pole is attracted by the magnetic pole of the rotor to reduce the resultant force of the eccentricity, thereby weakening the polarization rotation of the rotor. 15 Of course, as can be easily understood by those skilled in the art, the structure of the present invention is not limited to the inner rotor motor, and can be easily Switch to Rotor motor, so as shown in Fig. 8, the 'stator 5' is disposed in the outer rotor 3", which is separated by an air gap 4", and the stator 5" has two bodies 5"" and a high magnetoresistive section 6", two coils The groups 52" are respectively disposed on the body 5"" to provide energizing energy, and the outer rotor has twelve staggered magnetic poles, and the two main magnetic poles 54" correspond to the outer rotor magnetic poles", when a main magnetic pole 54" corresponds The rotor pole 32, when the other main pole corresponds to the buffer of the outer rotor pole 32"; the main pole 54, and the far main pole auxiliary pole 58" still maintain the clip-obtuse angle, thereby effectively reducing the resultant force of the eccentricity, and The vibrations and abrasions caused by the above are only the preferred embodiments of the present invention, and the scope of the present invention is limited to the extent that the present invention is not limited to the scope of the present invention. The simple equivalent changes and modifications made to the contents of the specification are still within the scope of the invention.
II 200901602 【圖式簡單說明】 圖1是美國第6,043,574號專利之步進馬 1 逐—較佳賓 施例俯視示意圖； ' 圖2是圖1步進馬達實施例之磁力線分佈示专、图. 5 圖3是本案創作人另一創作之步進馬達俯視示意圖； 圖4是本發明第一較佳實施例之步進馬達俯視示意 圖’說明定子、各磁極與轉子之關係； 圖5是圖4實施例磁漏磁力線示意圖； 圖ό是圖4實施例之磁力合力示意圖； 0 圖7是本案第二較佳實施例之俯視示意圖；及 圖8是本案第三較佳實施例之俯視示意圖。 12 200901602 . 【主要元件符號說明】 10、5、5’、5”...定子 122、142...中央柱 124、144、52、52,、52，，··.線圈組 5 146、148...磁革化 16、22、3、3’、3，，···轉子 2、12、14·.·鐵芯 20、30、30，···框軸 24、6、6,、6，，.··高磁阻段 10 26…主磁軛部 28...輔助磁輛•部 32、32’、32”…轉子磁極 4、4’、4”...氣隙 50、50’、50，，.··本體 15 54、54’、54”.·.主磁極 5 5、5 7 · · ·磁力線 56、56’、56”...近主磁極辅助磁極 58、58’、58”...遠主磁極輔助磁極 F1 〜F3...力 13II 200901602 [Simplified Schematic] FIG. 1 is a schematic top view of a stepping horse 1 to a preferred embodiment of the US Patent No. 6,043,574; FIG. 2 is a diagram showing the magnetic line distribution of the stepping motor embodiment of FIG. 3 is a top plan view of another stepping motor of the creator of the present invention; FIG. 4 is a top plan view of the stepping motor of the first preferred embodiment of the present invention, illustrating the relationship between the stator, the magnetic poles and the rotor; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 7 is a top plan view of a second preferred embodiment of the present invention; and FIG. 8 is a top plan view of a third preferred embodiment of the present invention. FIG. 12 200901602 . [Description of main component symbols] 10, 5, 5', 5"... stators 122, 142... central columns 124, 144, 52, 52, 52, ..., coil sets 5 146, 148...magnetic leather, 16, 22, 3, 3', 3, ... rotor cores 20, 30, 30, ..., frame shafts 24, 6, 6 6, 6, ... high magnetic reluctance section 10 26... main yoke part 28... auxiliary magnetic motor part 32, 32', 32"... rotor magnetic pole 4, 4', 4"... air gap 50 , 50', 50, ..... body 15 54, 54', 54".. main magnetic pole 5 5, 5 7 · · magnetic lines 56, 56', 56" ... near the main magnetic pole auxiliary magnetic pole 58, 58', 58"... far main magnetic pole auxiliary magnetic pole F1 ~ F3... force 13