201025793 六、發明說明： 【發明所屬之技術領域】 本發明係為一種永磁式電機之轉子結構及其製造方 法’特別是關於具有由單一種低導磁材料以一體成型方式 形成之結合件的轉子結構。 【先前技術】 一般而言，習用之永磁式電機的轉子均具有一轉軸及 _ 一磁鐵件’其中該磁鐵件係設置於該轉軸之徑向外表面並 具有數個磁極’且該數個磁極係朝向該永磁式電機之定子 的數個線圈。藉此，當該數個線圈導入數個電流而產生交 變磁場時’即可利用該交變磁場與該磁鐵件之磁極之間的 相斥或相吸磁力而達到轉動該轉子之目的。然而，由於此 種習用轉子構造之磁極所產生的磁力線在該轉子與定子之 間的分佈狀態並不均勻，故而在該轉子進行轉動時極易產 生大的頓轉轉矩〔Cogging Torque〕，而此頓轉轉矩將導致 ® 此種永磁式電機容易在運轉時產生震動及噪音。此外，由 於該磁力線所形成的封閉磁路係通過該轉軸，故該轉軸必 須選用具有高導磁特性之材料；惟，由於一般具有高導磁 特性之材料均為一導電材料，因此在該轉軸通過該磁力線 犄，該轉轴將在與該磁力線垂直的切面上形成電流迴路而 產生熱能損耗，此即所謂之「渦流損〔Eddy Current loss〕」。 關於存在上述習用之永磁式電機的大頓轉轉矩及渦 流損等缺點，已有數種習知方法針對此種永磁式電機的轉 201025793 ^進行改良，以達到提高效能、降低運轉噪音並延長使用 壽命等目的。例如··以相互絕緣的矽鋼片沿該轉軸之軸向 堆疊形成該轉軸通過該磁鐵件的部位，進而降低在該轉轴 内所形成的渦流損。另，如美國專利第6,703,746號名為「内 藏式永磁轉子〔Interior Permanent Magnet Rotor〕」的發 明，其係於—轉子中預先設置數個磁力線路徑，且在該磁 力線路徑處形成數個溝槽，以便將一高磁能材料填充於該 賴接近該定子外周面的位置，並將-低磁能材料填充於 轉歡其餘空㈣’隨後再賴轉子騎充磁，藉此即 可規劃轉子内的磁力線路徑，使其不通職轉子之轉 軸其中，該高、低磁能材料係以液態形式填充入該溝槽 之後再固化，以利於製造該定子並避免該定子表面因具有 槽隙而產生過於不均勻的磁場分佈狀態，進而同時達到降 低頓轉轉矩及渦流損之功效。然而，上述二種解決方式均 使該轉子的結構過於複雜，導致該轉子必須以極為繁瑣之 ❹料及方式進讀造，造成不易量產及製程冗長等缺點。 基於上述原因，有必要進一步改良上述的習用之永磁式電 機的轉子結構。 【發明内容】 本發明之主要目的係提供—種永磁式電機之轉子結 構’該轉子結構係可降低成本且易於組裝及量產。 為達到别述發明目的，本發明所運用之技術手段及藉 由該技術手段所能達到之功效包含有： -種永磁式電機之轉子結構，其包含—永久磁環及一 201025793 結合件’該永久磁環具有一通道沿該永久磁環之軸向延 伸’而該結合件固定於該永久磁環，且該結合件係由具有 低導磁性之材料製成。其中，該永久磁環具有偶數個磁極， 且該磁極所形成之磁力線的路徑係形成一哈爾巴赫陣列。 藉此’以該具有低導磁性之材料所製成之芯部及該形成哈 爾巴赫陣列之永久磁環可達到簡化製程、降低結構複雜度 及製造成本等功效。 所述之轉子結構的結合件係以一體成型的方式製 © 成，藉以更進一步簡化製程並降低結構複雜度。 此外，本發明之永磁式電機之轉子結構之製造方法包 含：將一充磁機對數個磁鐵進行充磁，使各該磁鐵分別成 為一 N極磁鐵、一極間磁鐵或一 $極磁鐵；將各該磁鐵以 一 N極磁鐵及一 s極磁鐵之間共同夾設至少一極間磁鐵的 方式結合，以形成具有哈爾巴赫陣列的一永久磁環；以一 低導磁材料製成一結合件，並將該永久磁環固定於該結合 件。藉此，即可利用簡易之製程構成具有上述功效之轉子 0 結構。 【實施方式】 ▲為讓本發明之上述及其他目的、特徵及優點能更明顯 易1Ϊ於下文將例舉較佳實施例並配合所附圖式作詳細說 明，惟其並非用以限定本發明。 請參照第1及2圖所示，其係分別為本發明第一實施 例之永磁式錢之轉子結構的組合及分解立體® 〇本發明 第-實施例之轉子結構包含—永久磁環〗及―結合件2， 201025793 其中該水久磁環〗係以—可充磁之磁㈣料iMagnetie201025793 VI. Description of the Invention: [Technical Field] The present invention relates to a rotor structure of a permanent magnet type motor and a method of manufacturing the same, particularly relating to a joint having a single low-magnetic conductive material integrally formed. Rotor structure. [Prior Art] In general, the rotor of a conventional permanent magnet motor has a rotating shaft and a magnet member, wherein the magnet member is disposed on a radially outer surface of the rotating shaft and has a plurality of magnetic poles and the plurality of The magnetic poles are oriented toward a plurality of coils of the stator of the permanent magnet motor. Thereby, when the plurality of coils introduce a plurality of currents to generate an alternating magnetic field, the purpose of rotating the rotor can be achieved by utilizing the repulsive or attracting magnetic force between the alternating magnetic field and the magnetic pole of the magnet member. However, since the magnetic field lines generated by the magnetic poles of the conventional rotor structure are not uniformly distributed between the rotor and the stator, it is easy to generate a large torque (Cogging Torque) when the rotor rotates. This torque will cause the permanent magnet motor to easily generate vibration and noise during operation. In addition, since the closed magnetic circuit formed by the magnetic lines of force passes through the rotating shaft, the rotating shaft must use a material having high magnetic permeability; however, since the material generally having high magnetic permeability is a conductive material, the rotating shaft is Through the magnetic flux 犄, the rotating shaft forms a current loop on the tangential plane perpendicular to the magnetic line of force to cause thermal energy loss, which is called "Eddy Current loss". Regarding the shortcomings such as the large torque and the eddy current loss of the conventional permanent magnet type motor, several conventional methods have been proposed for the improvement of the permanent magnet type motor to improve the performance and reduce the running noise. Extend the service life and other purposes. For example, the mutually insulated silicon steel sheets are stacked along the axial direction of the rotating shaft to form a portion where the rotating shaft passes through the magnet member, thereby reducing the eddy current loss formed in the rotating shaft. In addition, as disclosed in U.S. Patent No. 6,703,746, "Interior Permanent Magnet Rotor", a plurality of magnetic line paths are preset in the rotor, and a plurality of grooves are formed in the path of the magnetic lines. a groove for filling a high magnetic energy material at a position close to the outer circumferential surface of the stator, and filling the low magnetic energy material in the rest of the turn (four)' and then magnetizing the rotor, thereby planning the inside of the rotor The magnetic flux path is such that it does not pass through the rotating shaft of the rotor. The high and low magnetic energy materials are filled in the liquid form and then solidified to facilitate the manufacture of the stator and avoid excessive unevenness of the stator surface due to the slot. The magnetic field distribution state, at the same time, achieves the effect of reducing the torque and eddy current loss. However, the above two solutions all make the structure of the rotor too complicated, which causes the rotor to be read in an extremely cumbersome manner and in a manner that is difficult to mass-produce and has a long process. For the above reasons, it is necessary to further improve the rotor structure of the above-described conventional permanent magnet type motor. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a rotor structure for a permanent magnet type motor. The rotor structure can be cost-effective and easy to assemble and mass-produce. In order to achieve the objectives of the invention, the technical means and the functions achievable by the technical means include: - a rotor structure of a permanent magnet type motor, comprising - a permanent magnetic ring and a 201025793 joint member' The permanent magnetic ring has a passage extending along the axial direction of the permanent magnetic ring and the coupling member is fixed to the permanent magnetic ring, and the coupling member is made of a material having low magnetic permeability. Wherein, the permanent magnetic ring has an even number of magnetic poles, and the path of the magnetic lines formed by the magnetic poles forms a Halbach array. Thereby, the core made of the material having low magnetic permeability and the permanent magnetic ring forming the Hallbach array can achieve the effects of simplifying the process, reducing the structural complexity and manufacturing cost. The joint of the rotor structure is integrally formed, thereby further simplifying the process and reducing the structural complexity. In addition, the manufacturing method of the rotor structure of the permanent magnet type motor of the present invention comprises: magnetizing a magnetizer of a magnetizer to make each magnet become an N pole magnet, an interpole magnet or a $ pole magnet; Combining each of the magnets with at least one interpole magnet between an N-pole magnet and a S-pole magnet to form a permanent magnetic ring having a Halbach array; forming a low magnetic permeability material A coupling member is attached to the permanent magnet ring. Thereby, the rotor 0 structure having the above-described effects can be constructed by a simple process. The above and other objects, features, and advantages of the present invention will become more apparent from the description of the preferred embodiments. Please refer to FIGS. 1 and 2, which are respectively a combination and an exploded perspective of a permanent magnet type rotor structure according to a first embodiment of the present invention. The rotor structure of the first embodiment of the present invention includes a permanent magnetic ring. And "combined parts 2, 201025793" wherein the water-long magnetic ring is made of - magnetizable magnetic (four) material iMagnetie
Energy胸㈣1〕經過4莉程後構成，即該磁能材料係 可選自任何可構成磁性物質之材料，其中該永久磁環工由 環繞-通it U之數個顧12所觀，且該通道n及磁鐵 12係分靡該永久磁環丨之軸向延伸；該結合件2在本第 -實施射係為-轉軸，且該轉軸具有—芯部21及二端部 22該心。(3 21係穿設固定於該永久磁環】的通道^，而 該二端部22則分別形成該轉子結構在轴向上之二端。藉此 © 本發明之第_實施例的轉子結構可應用於任何習用之内 轉子式的永磁式錢’其中該永久磁環1係供與該徑向永 磁式電機之-疋子〔未綠示〕進行感應，而該結合件2之 端部22職該轉子結射轉_結合於難向永磁式電 機的殼體〔未繪示〕。 請參照第3a及3b圖所示，其係分別為本發明第一實 施例之永久磁環1的實際内部磁路及理想内部磁路示意圖 。該水久磁環1具有偶數個磁極，且該永久磁環i之磁極 罾 係欲形成如第3b圖所示之磁力線a之路徑，以構成一内轉 子式的啥爾巴赫陣列〔祕ach Array〕，其中該永久磁環 1較佳係如第3a及3b圖所示具有四個磁極。在形成該永 久磁f 1之製程_，係以―充磁機各別對該數個磁鐵12 進行充磁，使各該磁鐵12依其内部磁場方向成為一 N極 磁鐵12卜一極間磁鐵122或一 s極磁鐵123，再將各該磁 鐵12以一 N極磁鐵121及一 s極磁鐵123之間共同夾設 至少-極間磁鐵122的方式結合形成具有前述之内轉子^ 哈爾巴赫陣列的永久磁環1。詳言之，各該N極磁鐵12% 201025793 了磁:方向係由該永久磁環1之徑向内表面朝該永久 ，向外表面延伸，並於該徑向外表面形成永久磁 之N極’各該極間磁鐵122之内部磁場方向則由該 S極磁鐵123朝該N極磁鐵⑵延伸；各該S極磁鐵123 之内P磁場方向則由該永久磁環k徑向外表面朝該永久 1環1讀向内表面延伸，並於該徑向外表面形成永久磁 52 ,極藉此，當結合各該磁鐵12形成該永久磁環 1時該永久磁環1的内部磁場方向即可近似如第3b圖所 0 示具有磁力線a之路㈣_子式时爾巴赫陣列。此種 形式分佈之磁力線a不僅可大幅提高該永久磁環1之磁極 在該永久磁環1之外周面所形成的磁通密度，而使通過該 永磁式，機之定子線圈的磁通量增加，並可大幅降低在該 永久磁環1之通道U内所形成的磁力線。此外，本發明之 轉子結構的永久磁環i亦可有效降低頓轉轉矩，因而減少 在運轉時所產生的震動及噪音。 另一方面，因本發明之永久磁環丨的磁力線3之路徑 係規劃呈所述之内轉子式的哈爾巴赫陣列’故該結合件2 的芯部21可選用具有低導磁性之材料製成，甚至該結合件 2整體均由該種具有低導磁性之材料利用一體成形的方式 構成。更詳言之，該結合件2可由具有極佳之剛性的不銹 鋼以一體成形的方式製成，藉以使本發明之轉子結構具有 結構及製程簡化且結構強度及使用壽命增加之功效，同時 亦可降低製造成本；此外，該結合件2亦可由耐高溫、耐 磨性佳且具ifj強度之非金屬材料構成，例如工程塑膠中的 PEEK、POM或PA6/66等，以便以射出成形方式製造該結 201025793 合件2,進而再簡化其製程。 ❹Energy chest (4) 1] is formed after 4 liters, that is, the magnetic energy material can be selected from any material that can constitute a magnetic substance, wherein the permanent magnetic ring is viewed by a plurality of 12-way and U-channels, and the channel And the magnet 12 is branched from the axial extension of the permanent magnetic ring ;; the coupling member 2 is a rotating shaft in the first embodiment, and the rotating shaft has a core 21 and a two end portion 22 . (3 21 is a passage through which the permanent magnet ring is fixed), and the two end portions 22 respectively form two ends of the rotor structure in the axial direction. Thereby, the rotor structure of the first embodiment of the present invention It can be applied to any conventional inner rotor type permanent magnet type 'where the permanent magnetic ring 1 is for sensing with the radial permanent magnet type motor - the dice [not green], and the end of the coupling member 2 The part 22 of the rotor is coupled to the housing of a hard-to-reach permanent magnet motor (not shown). Please refer to the figures 3a and 3b, which are respectively the permanent magnetic rings of the first embodiment of the present invention. A schematic diagram of an actual internal magnetic circuit and an ideal internal magnetic circuit. The water magnetic ring 1 has an even number of magnetic poles, and the magnetic poles of the permanent magnetic ring i are formed to form a path of magnetic lines of force a as shown in FIG. 3b. An inner rotor type 啥 巴 Array, wherein the permanent magnetic ring 1 preferably has four magnetic poles as shown in FIGS. 3a and 3b. In the process of forming the permanent magnetic f 1 , The magnetizers respectively magnetize the plurality of magnets 12 so that each of the magnets 12 becomes a N according to the direction of the internal magnetic field thereof. The pole magnet 12 includes an interpole magnet 122 or an s pole magnet 123, and each of the magnets 12 is formed by combining at least an interpole magnet 122 between an N pole magnet 121 and a s pole magnet 123. The permanent magnet ring 1 of the inner rotor ^Halbach array. In detail, each of the N-pole magnets 12% 201025793 is magnetic: the direction is from the radially inner surface of the permanent magnet ring 1 toward the permanent, outward surface Extending, and forming a permanent magnetic N pole on the radially outer surface. The internal magnetic field direction of each of the interpole magnets 122 extends from the S pole magnet 123 toward the N pole magnet (2); and the inside of each of the S pole magnets 123 The direction of the magnetic field extends from the radially outer surface of the permanent magnet ring k toward the inner surface of the permanent 1 ring 1 reading, and a permanent magnet 52 is formed on the radially outer surface, thereby forming the permanent when the magnets 12 are combined When the magnetic ring 1 is used, the direction of the internal magnetic field of the permanent magnetic ring 1 can be approximated as shown in Fig. 3b, which has the magnetic field line a (4) _ sub-hour Birkbach array. The magnetic line a of this form distribution can not only greatly improve the permanent The magnetic flux density formed by the magnetic pole of the magnetic ring 1 on the outer peripheral surface of the permanent magnetic ring 1, By the permanent magnet type, the magnetic flux of the stator coil of the machine is increased, and the magnetic lines of force formed in the passage U of the permanent magnetic ring 1 can be greatly reduced. Further, the permanent magnetic ring i of the rotor structure of the present invention can be effectively reduced. The torque is reduced, thereby reducing the vibration and noise generated during operation. On the other hand, the path of the magnetic field lines 3 of the permanent magnetic ring of the present invention is planned to be the inner rotor type Halbach array. The core portion 21 of the bonding member 2 can be made of a material having low magnetic permeability, and even the bonding member 2 is integrally formed of such a material having low magnetic permeability by integral molding. More specifically, the bonding member 2 can be made by integrally forming stainless steel with excellent rigidity, so that the rotor structure of the invention has the advantages of simple structure and process, increased structural strength and service life, and can also reduce manufacturing cost; 2 can also be made of non-metallic materials with high temperature resistance, good wear resistance and ifj strength, such as PEEK, POM or PA6/66 in engineering plastics, etc. The engagement member made 201,025,793 2 junction, and then further simplify their manufacturing process. ❹
切參照第4圖所示，其係為本發明第二實施例之永磁 機之射結獅分解立體圖。相較於本發明之第一實 本實施例中之永A磁環Γ亦具有—通道1〗，沿該永 Γ之轴向延伸，惟其内部磁場方向所近似者係為形 f 5b圖所示之外轉子式的吟爾巴赫陣列之磁力線b 。此外，本實施例中之結合件2，係為一輪較，該輪 轂具有-環牆部23及-軸部24，且該永久磁環！，的外周 面係固定結合於該環牆部23之内周面，而該軸部24則伸 入該永久磁鐵環i，之通道u，，邱軸部24與形成該通道 11之内周面之間形成一容置空間。藉此本發明之第二實 =的轉子結構可應用於任何習用之外轉子式的徑向永磁 式电機’其十該永久磁環J’及該轴部24之間的容置空間 係供容置該徑向永磁式電機之一定子〔未綠示〕，且該結 合件2’之軸部24係供該轉子結構可轉動的結合於該徑向 永磁式電機的殼體〔未緣示〕。此外，該永久磁環1，亦由 沿其軸向延伸之數個磁鐵12,所構成。 請再參照第5a及5b圖所示’在形成該永久磁環i，之 製程中，除了以該充磁機各別對該數個磁鐵12，進行充磁 之後’使該磁鐵12’所形成極磁鐵121，、極間磁鐵122, 及S極磁鐵123,可共同組成該外轉子式哈爾巴赫陣列的永 久磁環Γ〔即該N極磁鐵121，具有一 N極形成於該永久 磁環Γ之通道11’的壁面；而該s極磁鐵123,則具有一 S 極形成於該永久磁％ Γ之通道li，的壁面〕，其他步驟均 與製造本發明之第-實施例之永久磁環丨的步驟相同。藉 201025793 此，當結合各該磁鐵12’形成該永久磁環丨，時，該永久磁 環Γ的内部磁場方向即可近似如第5b圖所示具有磁力線b 之路徑的外轉子式的哈爾巴赫陣列，而此種形式分佈之磁 力線b不僅可有效增加該永久磁環i，之磁極在财久磁環 Γ之通道11’内所形成的磁通密度，並可大幅降低在該永久 輯1之外周面所形成的磁力線，進而使該結合件2，的環 牆部23可選用前述之具有低導磁性之材料製成，且甚至該 結合件2’整體均可由該種具有低導磁性之材料利用一體成 Ο 形的方式構成。 綜上所述，相較於習用之永磁式電機之轉子結構具有 大頓轉轉矩及渦流損，或者存在結構及製造程序複雜等缺 點，因為本發明之永久磁環1、1’係具有外轉子式或内轉 +式之哈爾巴料卿式的磁力線a、b，使該轉子結構可 提供較大之磁通密度並降低頓轉轉矩，且更由於該永久磁 壞卜1之磁力線a、b的分布方式而使該結合件2、2,之 料21或環料23可_魏導磁材料構成，進而有效 β 降低該芯部21或環牆部23内之渦流損及磁滯損，甚至可 選用非金屬材質製造該結合件2、2，，以達到免除該二能 量損耗、降低製造成本及簡化製程等目的。 軸本發明已_上述較佳實施例揭示，然其並非用 以限定本發明，任何熟習此技藝者’在不脫離本發明之精 神和範圍之内’當可作各種更動與修改因此本發明之保 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】 201025793 第1圖本發明第一實施例之永磁式電機之轉子結構的 組合立體圖。 第2圖·本發明第—實施例之永磁式電機之轉子結構的 为解立體圖。 第3a ® .本發明第—實施例之永磁式電機之轉子 的=久磁環之_姆示意圖。 ❿Referring to Fig. 4, it is an exploded perspective view of the shot lion of the permanent magnet machine of the second embodiment of the present invention. Compared with the first embodiment of the present invention, the permanent A magnetic ring Γ also has a channel 1 extending along the axial direction of the permanent ridge, but the internal magnetic field direction is similar to the shape f 5b The magnetic field line b of the outer rotor type of the Bühbach array. In addition, the coupling member 2 in this embodiment is a wheel comparison, and the hub has a ring wall portion 23 and a shaft portion 24, and the permanent magnetic ring! The outer peripheral surface is fixedly coupled to the inner circumferential surface of the annular wall portion 23, and the shaft portion 24 extends into the permanent magnet ring i, the passage u, the chisel shaft portion 24 and the inner circumferential surface forming the passage 11. A space is formed between them. Thereby, the second real rotor structure of the present invention can be applied to any conventional rotor-type radial permanent magnet motor, which has a space between the permanent magnetic ring J' and the shaft portion 24. Providing a stator (not shown) of the radial permanent magnet motor, and the shaft portion 24 of the coupling member 2' is rotatably coupled to the casing of the radial permanent magnet motor. Did not show]. Further, the permanent magnet ring 1 is also constituted by a plurality of magnets 12 extending in the axial direction thereof. Referring to Figures 5a and 5b, in the process of forming the permanent magnetic ring i, the magnet 12 is formed by magnetizing the magnets 12 after the magnetizers are respectively magnetized. The pole magnet 121, the interpole magnet 122, and the S pole magnet 123 may together constitute a permanent magnetic ring 该 of the outer rotor type Halbach array (ie, the N pole magnet 121 has an N pole formed on the permanent magnetic ring) The wall of the passage 11' of the crucible; and the s-pole magnet 123 has a wall surface formed by the S-pole formed in the passage of the permanent magnet, and the other steps are the permanent magnet of the first embodiment of the present invention. The steps are the same. By 201025793, when the permanent magnet ring is formed in combination with each of the magnets 12', the direction of the internal magnetic field of the permanent magnet ring can be approximated by the outer rotor type of the path having the path of the magnetic force line b as shown in Fig. 5b. Bach array, and the magnetic flux b distributed in this form can not only effectively increase the magnetic flux density formed by the magnetic pole i in the passage 11' of the permanent magnetic ring, and can be greatly reduced in the permanent series 1 The magnetic lines of force formed on the outer peripheral surface, and thus the annular wall portion 23 of the bonding member 2 can be made of the material having low magnetic permeability as described above, and even the bonding member 2' can be made of a low magnetic permeability. The material is constructed in a unitary shape. In summary, the rotor structure of the permanent magnet type motor has a large torque and eddy current loss, or has the disadvantages of complicated structure and manufacturing procedures, because the permanent magnetic ring 1, 1' of the present invention has The outer rotor type or the inner rotor type + type Harbin's magnetic field lines a, b make the rotor structure provide a larger magnetic flux density and reduce the torsional torque, and more because of the permanent magnetic defect The magnetic lines a and b are distributed such that the bonding members 2, 2, the material 21 or the ring material 23 can be made of a magnetic material, thereby effectively reducing the eddy current loss and magnetic force in the core portion 21 or the ring wall portion 23. The dam can be used to make the joints 2 and 2 even with non-metal materials, so as to avoid the two energy loss, reduce the manufacturing cost and simplify the process. The present invention has been disclosed in the above-described preferred embodiments, and it is not intended to limit the invention, and it is intended that the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application attached. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a combination of a rotor structure of a permanent magnet motor according to a first embodiment of the present invention. Fig. 2 is a perspective view showing the structure of a rotor of a permanent magnet type motor according to a first embodiment of the present invention. 3a ® . Schematic diagram of the permanent magnet type rotor of the first embodiment of the present invention. ❿
^ 圖本發明第一實施例之永磁式電機之轉子结構 的永久磁環之理想内部磁路示意圖。 第4圖：本發明第二實施例之永磁式電機之轉子結構的 分解立體圖。 第5a圖.本發明第二實施例之永磁式電機之轉子結構 的永久磁環之内部磁路示意圖。 第5b圖：本發明第二實施例之永磁式電機之轉子結構 的永久磁環之理想内部磁路示意圖。 【主要元件符號說明】 1 永久磁環 Γ 永久磁環 11 通道 11， 通道 12 磁鐵 12， 磁鐵 121 N極磁鐵 121， N極磁鐵 122.極間磁鐵 122, 極間磁鐵 123 S極磁鐵 123’ S極磁鐵 2 結合件 T 結合件 21 芯部 22 端部 23 環牆部 24 轴部^ is a schematic diagram of an ideal internal magnetic circuit of a permanent magnetic ring of a rotor structure of a permanent magnet motor according to a first embodiment of the present invention. Fig. 4 is an exploded perspective view showing the structure of a rotor of a permanent magnet type motor according to a second embodiment of the present invention. Fig. 5a is a schematic view showing the internal magnetic circuit of the permanent magnetic ring of the rotor structure of the permanent magnet type motor according to the second embodiment of the present invention. Fig. 5b is a view showing an ideal internal magnetic circuit of a permanent magnetic ring of a rotor structure of a permanent magnet type motor according to a second embodiment of the present invention. [Main component symbol description] 1 Permanent magnetic ring 永久 Permanent magnetic ring 11 channel 11, channel 12 magnet 12, magnet 121 N-pole magnet 121, N-pole magnet 122. Interpole magnet 122, interpole magnet 123 S-pole magnet 123' S Pole magnet 2 joint member T joint member 21 core portion 22 end portion 23 ring portion 24 shaft portion