200945737 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種線性馬達，龙 線圈中流通之電流而獲得用於直線i動 1磁推鐵力產生之磁場與 【先前技術】 相狀為細長板狀之場磁鐵 扁平型之線性馬達、以及於捍(轴)狀之場磁鐵周圍 圍繞有同狀之電樞的桿型(亦稱為麵型)之線性馬達。 織於型之祕馬達中，相對於形麵細長板狀之場磁 鐵’電樞相對地進行直線運動。場磁鐵係以於表面上交替地 形成Ν極及顺崎平㈣磁細成者。電 樞具有經由磁性間隙而與場磁鐵相對向的II、V、w相之線 ^當線圈中流通有三相交流電流時，藉由磁鐵產生之磁場 /轰線圈中流通之電流而產生用於直線運動之推力（例如參昭 專利文獻D。亦習知為了獲得高推力之線性馬達而將磁心 插入於線圈之具磁心之扁平型線性馬達。 極二Γ面’於桿型之線性馬達中，相對於交替地磁化為N 極及S極之桿（轴）’圍繞於桿之周圍的筒形狀之電樞相對地 進仃直線運動。電樞具有經由磁性間隙而纏繞於場磁鐵周圍 之U、V、W相之線圈。U、V、W相之線圈排列於桿之轴線方 向。當線圈中流通有U、V、W相之三相交流電流時，藉由磁 鐵產生之磁場與線圈中流通之電流而產生用於直線運動之 098104165 200945737 推力（例如參照專利文獻2)。 對於線性馬達而言，要求其外形精簡但可產生較大推力。 此處，線性馬達之推力與磁鐵產生之磁通密度B及線圈中流 ，通之電流1之乘積成比例。因此，可藉由敎磁鐵之磁通密 ‘度6或增大線圈中流通之電流I而增大推力^ 了增大磁鐵 之磁通密度’於錄馬達之發職史巾，已將練鐵磁鐵改 換為稀土類磁鐵。然而，增大磁鐵之磁通密度之程度有限， ❹ 難以更進一步增大磁通密度B。 增大線圈中流通之電流I亦可增大推力。然而，必須於防 止線圈發熱之基礎上增大線圈中流通之電流。其原因在於. 線圈之導線具有電阻’因此若線圈中流通有較大之電流，則 會產生與電流之二次方成比例之焦耳熱。若線圈之溫度因焦 耳熱而繼續上升’則導線之絕緣包覆膜會熔化，因而導線彼 此變得不絕緣。若導線彼此變得不絕緣，則等價於線圈之E ❹ 數變少，導致與線圈之匝數成比例的線性馬達之推力降低。 因此’線圈中流通之電流受限於不會使導線之絕緣包覆膜溶 化之溫度。防止線圈之發熱亦與增大馬達產生之推力有密切 相關。 為了防止線圈之發熱’亦使用金、銀或電阻為零之超導物 質來代替銅。若電阻小，則線圈不會發熱’因此線圈中可流 通較大之電流，進而可增大線性馬達之推力。 進而，為了防止線圈之發熱’亦於覆蓋線圈之外罩或插入 098104165 200945737 於線圈之磁心處形成鰭片，使熱量自鰭片散逸至大氣中。只 要可將產生自線圈之熱量散逸，則即使線圈本身之發熱較 大，亦可防止線圈溫度之上升。 (專利文獻1)日本專利特開2006-074975號公報 (專利文獻2)日本專利特開2002-354780號公報 【發明内容】 (發明所欲解決之問題） 然而，使用金或超導物質來代替銅之方法於成本方面難以 實現。又，對於在線圈之外罩或磁心處形成鰭片而散逸熱量 之方法，其構造性上已達極限，無法更進—步提高冷卻效率。 因此，本發明之目的在於提供一種外形精簡且可產生更高 推力之新型線性馬達。 (解決問題之手段） 為了解決上述問題，第1發明係藉由場磁鐵產生之磁場與 、線圈中流通之電流而獲得用以使線圈相對於場磁鐵相對地 進行直線運動之推力之線性馬達；其具備有：場磁鐵其n 極及S極交替地排列於上述直線運動之方向；及電樞，具有 經由間隙而與上述場磁鐵相對向之複數個線圈、含有分別插 入於上述複數麟圈之複數個_的磁心、及纽於各線圈 與各梳齒之_線軸^上述線軸為絕緣體同時其熱傳 導率為2 W/(m · K)以上。 第2發明係藉由場磁鐵產生之磁場與線圈中流通之電流 098104165 匕 200945737 而獲得用以使線圈相對於場磁鐵相對地進行直線運動之推 力之線性馬達；其具備有：場磁鐵，其N極及s極交替地排 列於上述直線運動之方向；及電樞，具有經由間隙而與上述 — 場磁鐵相對向之複數個線圈、含有分別插入於上述複數個 -線圈之複數個梳齒的磁心、及包覆上述複數個線圈並將上 述複數個線圈結合於上述磁心之成形體；上述成形體為絕緣 體’同時’其熱傳導率為2 W/(m · K)以上。 © 第3發明係藉由場磁鐵產生之磁場與線圈中流通之電流 而獲得用以使線圈相對於場磁鐵相對地進行直線運動之推 力之線馬達；其具備有：場磁鐵，其N極及s極交替地排 列於上述直線運動之方向；及電樞，具有包圍上述場磁鐵周 圍之複數個線圈、及包覆±述複數個線圈之成形體；而上述 成形體為絕緣體，同時，其熱傳導率為2 W/(m· K)以上。 第4發明係藉由場磁鐵產生之磁場與線圈中流通之電流 ©而獲得用以使線圈相對於場磁鐵相對地進行直線運動之推 力之線性馬達；其具财：場顧，其n極及s極交替地排 列於^述直線運動之方向；及電樞，具有經*_而設置於 述#磁鐵周圍之複數個線圈、及用以保持上述複數個線 圈之線_制；社述持器包含在上述直線運動之 方向沿上述複數個線圈延伸之固持器本體部、及介設於相鄰 接之線圈間的複數個間隔件部，上述線圈固持器為絕緣體， 同時，其熱傳導率為2 W/(m· κ)以上。 098104165 200945737 第5發明如第1至第4發明之線性馬達中，上述線軸、上 述線圈固持器、或上述成形體係將具有複數個不同平均粒徑 的絕緣性之金屬氧化物粒子混合於樹脂而成者。 第6發明如第5發明之線性馬達中，上述線軸、上述線圈 固持器、或上述成形體係藉由將混合有上述絕緣性之金屬氧 化物粒子的熱塑性樹脂進行射出成形而製得。 第7發明如第5發明之線性馬達中，上述成形體係藉由將 混合有上述絕緣性之金屬氧化物粒子的熱硬化性樹脂注入 至模具之澆鑄方式而製得。 第8發明如第1至第7發明之線性馬達中，上述線軸、上 述線圈固持器、或上述成形體之線膨脹係數被設定為1〇χ 1〇-6以上且為30χ10-6以下。 (發明效果） 於扁平型之線性馬達中，將產生自線圈之熱量散逸之系統 之一有經由線轴而將熱量自線圈散逸至磁心之系統。線轴為 介设於線圈與磁心之梳齒之間的絕緣體，且具有使線圈與磁 心之梳齒絕緣的作用。根據第丨發明，由於線轴使用熱傳導 率為2 W/(m · Κ)以上之絕緣材料，故與絕緣紙製之線轴相 比較，可將熱傳導率提高十倍以上，可有效地將產生自線圈 之熱量散逸至磁心。因此，可提高線圈中流通之電流及線性 馬達之推力。 於扁平型之線性馬達中’將產生自線圈之熱量散逸之其他 098104165 200945737 系統有經^成形體而將熱量自線圈散逸至大氣之系統。成形 體具有包覆線圈並將線圈結合於磁心之作用。根據第2發 明’由於成形體使用熱傳導率為2 W/(m · j()以上之絕緣材 ，料，故與樹脂製之成形體相比較，可將熱傳導率提高十倍以 上，而可有效地將產生自線圈之熱量散逸至大氣。因此，可 提南線圈中流通之電流及線性馬達之推力。 則旱型之線性馬達中’將產生自線圈之熱量散逸之系統之 ❹一有經由成形體而將熱量自線圈散逸至大氣之系統。成形體 具有包覆線圈之作用及作為外罩之作用。根據第3發明，由 於成形體使用熱傳導率為2 W/(m.K)以上之絕緣材料，故 與樹脂製之成形體相比較，可將熱傳導率提高十倍以上，可 有效地將產生自線圈之熱量散逸至大氣。因此，可提高線圈 中流通之電流及線性馬達之推力。 於桿型之線性馬達中’將自線圈產生之熱量散逸之系統之 〇 一有將熱量自線圈散逸至線圈固持器之系統。線圈固持器具 有在保持線圈之同時使相鄰接之線圈彼此絕緣之作用。根據 第4發明，由於線圈固持器使用熱傳導率為2 W/(m · K)以 上之絕緣材料，故與樹脂製之線圈固持器相比較，可將熱傳 導率提高十倍以上，可有效地將產生自線圈之熱量散逸至線 圈固持器。因此'，可提高線圈中流通之電流及線性馬達之推 力。 根據第5發明，由於將具有複數個不同平均粒徑的絕緣性 098104165 9 200945737 之金屬氧化物粒子混合於樹脂，故可以小直徑之金屬氧化物 粒子來填滿大直徑之金屬氧化物粒子彼此之樹脂之間隙。由 於可經由已提高填充率之金屬氧化物粒子來傳導熱量，故熱 傳導率提高。 根據第6發明，可以高尺寸精度大量地生產線轴、線圈固 持器、或成形體。 根據第7發明’由於可降低模具之成本，故可廉價地製造 成形體。 根據第8發明’線軸、線圈固持器、或成形體之線膨脹係 數比樹知（12〇\1〇 6)之線膨脹係數小1位數，與鋼（η〜I% )、銅（19〜20xl(T6)、及鋁（22〜23χ1(Γ6)等金屬之線膨 脹係數接近。由於可使溫度上升時之線軸、線圈固持器、或 成形體之展距與線圈、磁心之展距大致相等，故可保持該等 之接觸。因此，可防止因溫度上升而於該等之間產生真空間 隙或空氣層，導致熱量難以傳遞之情形。 【實施方式] 根據附圖式，詳細地對本發明一實施形態之線性馬達進 行說月圖1及圖2表示本發明第一實施形態之扁平型線性 馬達。圖1表示立體圖，圖2表示前視圖。該實施形態之線 馬達用於藉由單轴之致動II *使平台等之移動體於單轴 方向上移動者。於細長延伸之基座1上設置有板狀之場磁鐵 2作為線性馬達^子。隸馬達之雜9讀圈3與場磁 098104165 200945737 鐵2相對向。利用由電樞g之線圈3中所流通之電流與場磁 鐵2之礤場之作用產生的推力，使電樞9相對於場磁鐵2 進行直線運動。 -如圖2之前視圖所示，於場磁鐵2與電樞9之間設置有磁 - 性間隙g。即便當電樞9相對於場磁鐵2相對地進行移動 時，該間隙g亦保持固定。 如圖1所示，基座1於電樞9之直線運動方向上細長地延 ❹伸。基座1具有矩形狀之底部板la、及設置於底部板la之 寬度方向兩端部之一對側甓部lb。於一對侧壁部lb之上表 面分別組裝有線性導軌之軌道5。軌道5沿側壁部lb之長 度方向之大致全長而細長地延伸。於軌道5之外周面，沿軌 道5形成有滚動體滚動槽，該滚動體滾動槽係供線性導軌之 塊體6之滾珠、滾子等之滚動體進行滾動運動。 於基座1之底部板la之上表面設置有場磁鐵2，該場磁 ❹ 鐵2之N極及S極交替地形成於電樞9之直線運動方向。如 圖3所示’場磁鐵2係將複數塊平行四邊形之板狀磁鐵19 排成一行而成者。各板狀磁鐵19中，於與場磁鐵2之長度200945737 VI. Description of the Invention: [Technical Field] The present invention relates to a linear motor, a current flowing in a dragon coil, and a magnetic field for generating a magnetic force for a linear motion 1 and a prior art A linear motor having a slender plate-like field magnet flat type and a rod type (also referred to as a face type) linear motor surrounded by a similarly shaped armature around a field magnet. In the motor of the woven type, the armature of the field magnet of the elongated plate is relatively linearly moved. The field magnets are formed by alternately forming a bungee and a saki (4) magnetic thinner on the surface. The armature has a line of II, V, and w phases opposed to the field magnet via the magnetic gap. When a three-phase alternating current flows through the coil, a magnetic field generated by the magnet/current flowing in the coil is generated for the straight line. Thrust of motion (for example, see Patent Document D. It is also known to insert a magnetic core into a flat linear motor having a core in order to obtain a high-thrust linear motor. The pole two-faced is in a rod type linear motor, relative The armatures of the cylinder shape that are alternately magnetized to the N poles and the S poles (shafts) around the rods are relatively linearly moved. The armature has U and V wound around the field magnets via magnetic gaps. The coil of the W phase. The coils of the U, V, and W phases are arranged in the axial direction of the rod. When the three-phase alternating current of the U, V, and W phases flows in the coil, the magnetic field generated by the magnet and the coil are circulated. The current generates a thrust of 098104165 200945737 for linear motion (for example, refer to Patent Document 2). For a linear motor, it is required to be compact in shape but can generate a large thrust. Here, the thrust of the linear motor and the magnet are generated. The magnetic flux density B and the current in the coil are proportional to the product of the current 1. Therefore, the magnetic flux can be increased by the magnetic flux of the neodymium magnet 6 or the current I flowing through the coil is increased. The magnetic flux density has been changed to a rare earth magnet in the history of the recording motor. However, increasing the magnetic flux density of the magnet is limited, and it is difficult to further increase the magnetic flux density B. The current I flowing through the coil can also increase the thrust. However, it is necessary to increase the current flowing in the coil on the basis of preventing the heat generated by the coil. The reason is that the wire of the coil has a resistance, so if a large current flows in the coil , the Joule heat which is proportional to the square of the current is generated. If the temperature of the coil continues to rise due to Joule heat, the insulating coating of the wire will melt, and the wires become uninsulated with each other. Without insulation, the number of E turns equivalent to the coil is reduced, resulting in a decrease in the thrust of the linear motor proportional to the number of turns of the coil. Therefore, the current flowing in the coil is limited by the insulating coating that does not cause the wire. The temperature of the coil is also closely related to the increase of the thrust generated by the motor. In order to prevent the heat generated by the coil, gold, silver or a superconducting material with zero resistance is used instead of copper. If the resistance is small, the coil is not It will generate heat. Therefore, a large current can flow in the coil, and the thrust of the linear motor can be increased. Further, in order to prevent the heat generated by the coil, a fin is formed on the core of the coil by covering the outer cover of the coil or inserting 098104165 200945737. The heat is dissipated from the fins to the atmosphere. As long as the heat generated from the coil can be dissipated, even if the heat of the coil itself is large, the temperature of the coil can be prevented from rising. (Patent Document 1) Japanese Patent Laid-Open Publication No. 2006-074975 (Patent Document 2) Japanese Laid-Open Patent Publication No. 2002-354780 (Draft of the Invention) However, the method of using gold or a superconducting material instead of copper is difficult to realize in terms of cost. Further, the method of forming fins at the outer cover of the coil or the core to dissipate heat has reached a limit in terms of structure, and it is impossible to further improve the cooling efficiency. Accordingly, it is an object of the present invention to provide a novel linear motor that is compact in shape and produces higher thrust. (Means for Solving the Problem) In order to solve the above problems, the first invention is a linear motor that obtains a thrust for linearly moving a coil relative to a field magnet by a magnetic field generated by a field magnet and a current flowing through the coil; The field magnet includes: n poles and S poles alternately arranged in a direction of the linear motion; and an armature having a plurality of coils facing the field magnet via a gap, and respectively inserted in the plurality of collars A plurality of cores of _ and a coil of each of the coils and the respective comb teeth are the insulators and have a thermal conductivity of 2 W/(m · K) or more. According to a second aspect of the invention, a linear motor for generating a thrust for linearly moving a coil relative to a field magnet is obtained by a magnetic field generated by a field magnet and a current flowing through the coil 098104165 匕200945737; and the field magnet is provided with a field magnet The pole and the s pole are alternately arranged in a direction of the linear motion; and the armature has a plurality of coils opposed to the field magnet via the gap, and a core including a plurality of comb teeth respectively inserted into the plurality of coils And a molded body in which the plurality of coils are coated and the plurality of coils are bonded to the magnetic core; and the molded body is an insulator 'while' having a thermal conductivity of 2 W/(m·K) or more. © the third invention, a line motor for obtaining a thrust for linearly moving a coil relative to a field magnet by a magnetic field generated by a field magnet and a current flowing in a coil; the field magnet having a field magnet and an N pole thereof The s poles are alternately arranged in the direction of the linear motion; and the armature has a plurality of coils surrounding the field magnet and a molded body covering the plurality of coils; and the formed body is an insulator and heat conduction thereof The rate is 2 W/(m·K) or more. According to a fourth aspect of the invention, a linear motor for obtaining a thrust for linearly moving a coil relative to a field magnet by a magnetic field generated by a field magnet and a current flowing in the coil is obtained; The s poles are alternately arranged in the direction of the linear motion; and the armature has a plurality of coils disposed around the magnets via the *_ and a line for holding the plurality of coils; a holder body portion extending along the plurality of coils in the direction of the linear motion and a plurality of spacer portions interposed between the adjacent coils, wherein the coil holder is an insulator and has a thermal conductivity of 2 W/(m· κ) or more. In the linear motor according to the first to fourth aspects of the invention, the bobbin, the coil holder, or the molding system is formed by mixing a plurality of insulating metal oxide particles having different average particle diameters with a resin. By. In the linear motor according to the fifth aspect of the invention, the bobbin, the coil holder, or the molding system is produced by injection molding a thermoplastic resin in which the insulating metal oxide particles are mixed. According to a seventh aspect of the invention, in the linear motor of the fifth aspect of the invention, the molding system is produced by injecting a thermosetting resin in which the insulating metal oxide particles are mixed into a mold. In the linear motor according to the first to seventh aspects of the invention, the linear expansion coefficient of the bobbin, the coil holder, or the molded body is set to be 1 〇χ 1 〇 6 or more and 30 χ 10 -6 or less. (Effect of the Invention) In a flat type linear motor, one of the systems that dissipates heat generated from the coil has a system that dissipates heat from the coil to the core via the bobbin. The bobbin is an insulator interposed between the coil and the comb teeth of the core, and has a function of insulating the coil from the comb of the core. According to the invention of the third aspect, since the bobbin uses an insulating material having a thermal conductivity of 2 W/(m · Κ) or more, the thermal conductivity can be increased by more than ten times as compared with the bobbin made of insulating paper, and can be efficiently produced. The heat from the coil is dissipated to the core. Therefore, the current flowing in the coil and the thrust of the linear motor can be increased. In a flat linear motor, the other 098104165 200945737 system that has generated heat from the coil has a system that dissipates heat from the coil to the atmosphere. The shaped body has the function of covering the coil and bonding the coil to the core. According to the second invention, since the molded article is made of an insulating material having a thermal conductivity of 2 W/(m·j() or more, the thermal conductivity can be increased by more than ten times as compared with the molded body of the resin, and it is effective. The ground dissipates heat generated from the coil to the atmosphere. Therefore, the current flowing in the south coil and the thrust of the linear motor can be extracted. In the dry type linear motor, the system that generates heat dissipation from the coil passes through the forming. A system in which heat is dissipated from a coil to the atmosphere. The molded body has a function of covering a coil and functions as a cover. According to the third aspect of the invention, since the molded body uses an insulating material having a thermal conductivity of 2 W/(mK) or more, Compared with the molded body made of resin, the thermal conductivity can be increased by more than ten times, and the heat generated from the coil can be effectively dissipated to the atmosphere. Therefore, the current flowing through the coil and the thrust of the linear motor can be increased. In a linear motor, the system that dissipates the heat generated from the coil has a system that dissipates heat from the coil to the coil holder. The coil holder has the same holding coil. According to the fourth aspect of the invention, since the coil holder uses an insulating material having a thermal conductivity of 2 W/(m·K) or more, it can be compared with a resin-made coil holder. The heat conductivity is increased by more than ten times, and the heat generated from the coil can be effectively dissipated to the coil holder. Therefore, the current flowing in the coil and the thrust of the linear motor can be increased. According to the fifth invention, since there will be a plurality of different averages Insulation of the particle size 098104165 9 200945737 The metal oxide particles are mixed with the resin, so that the small-diameter metal oxide particles can fill the gap between the large-diameter metal oxide particles and the resin. According to the sixth aspect of the invention, the bobbin, the coil holder, or the molded body can be produced in a large amount with high dimensional accuracy. According to the seventh invention, the cost of the mold can be reduced, so that it can be inexpensive. The molded body is produced. According to the eighth invention, the linear expansion coefficient ratio of the bobbin, the coil holder, or the molded body is known (12) \1〇6) The linear expansion coefficient is one digit, which is close to the linear expansion coefficient of steel (η~I%), copper (19~20xl (T6), and aluminum (22~23χ1 (Γ6)). When the temperature rises, the span of the bobbin, the coil holder, or the formed body is substantially equal to the pitch of the coil and the core, so that the contact can be maintained. Therefore, it is prevented that the temperature rises between the two. In the vacuum gap or the air layer, it is difficult to transmit heat. [Embodiment] A linear motor according to an embodiment of the present invention is described in detail with reference to the accompanying drawings. FIG. 1 and FIG. 2 show a flat type according to the first embodiment of the present invention. Fig. 1 shows a perspective view, and Fig. 2 shows a front view. The line motor of this embodiment is used to move a moving body such as a platform in a uniaxial direction by a single axis actuation II*. A plate-shaped field magnet 2 is provided as a linear motor on the elongated extension base 1. The motor is mixed with 9 read ring 3 and field magnetic 098104165 200945737 iron 2 is opposite. The armature 9 is linearly moved with respect to the field magnet 2 by the thrust generated by the action of the current flowing through the coil 3 of the armature g and the field field of the field magnet 2. - As shown in the front view of Fig. 2, a magnetic-mechanical gap g is provided between the field magnet 2 and the armature 9. Even when the armature 9 moves relative to the field magnet 2, the gap g remains fixed. As shown in Fig. 1, the base 1 is elongated and elongated in the direction of linear motion of the armature 9. The susceptor 1 has a rectangular bottom plate 1a and a pair of side ribs lb provided at both end portions in the width direction of the bottom plate 1a. A rail 5 of a linear guide is assembled on the upper surface of the pair of side wall portions lb, respectively. The rail 5 extends in a slender manner along substantially the entire length of the side wall portion 1b. On the outer peripheral surface of the rail 5, a rolling body rolling groove is formed along the rail 5, and the rolling element rolling groove is used for rolling motion of a rolling element such as a ball or a roller of the block 6 of the linear guide. A field magnet 2 is disposed on the upper surface of the bottom plate 1a of the susceptor 1, and the N pole and the S pole of the field magnet yoke 2 are alternately formed in the linear motion direction of the armature 9. As shown in Fig. 3, the field magnet 2 is formed by arranging a plurality of parallelogram-shaped plate-shaped magnets 19 in a row. The length of the field magnet 2 in each of the plate magnets 19
方向正交之方向（圖中與紙面正交之方向）磁化為N極及S 極。如於場磁鐵2之長度方向交替地形成N極及§極，板狀 磁鐵19表面之磁極成為與相鄰板狀磁鐵19之磁極相反的磁 極。 如圖1所示，於左右一對軌道5上，分別可滑動地組裝有 098104165 200945737 線性導執之塊體6。門型之結合頂板7橫跨於左右之塊體6 上。於結合頂板7之下表面懸掛有電樞9。 結合頂板7具有於寬度方向細長地延伸之頂架部7a、及 設置於頂架部7a之寬度方向兩端且朝下方垂下之一對腳部 7b。於腳部7b之下端組裝有線性導執之塊體6。於頂架部 7a之下表面組裝有電樞9。於頂架部7a之上表面組裝有移 動體。 塊體6形成為橫跨軌道5之鞍形狀。本實施形態中，對於 一個軌道5組裝有兩個塊體6。塊體6中形成有與執道5之 滾動體滚動槽相對向的負載滾動體滾動槽，同時，設置有用 以使滾動體循環之環道狀滾動體循環路徑。於塊體6之滾動 體循環路徑中排列並收容有複數個滚動體。當塊體6相對於 執道5進行滑動時，介設於軌道5之滚動體滾動槽與塊體6 之負載滾動體滾動槽之間的滾動體會進行滚動運動。與此同 時，滾動體於環道狀之滾動體循環路徑中進行循環。藉由滾 動體之滾動運動，可降低塊體6相對於軌道5進行滑動時之 摩擦阻力。 圖4及圖5表示電樞9之詳細圖。電樞9含有與場磁鐵2 相對向之三相線圈3(3a、3b、3c)、用以增強線圈3產生之 磁場之磁心11、及用以將產生自線圈3之熱量散逸至大氣 之散熱座12。 線圈3係將導線捲繞於磁心11之梳齒11a、lib、11c(正 098104165 12 200945737 確地說疋包覆梳齒之線轴14)周圍而成者，且於電框9之寬 度方向上形成為細長之環狀。三相線圈3a、3b、3c相鄰接 地排列於電樞9之直線運動方向上。當由u.V.W相所構成 之三相線圈3a、3b、3c中流通有相位每隔12〇。不同之三相 ，交流電流時，於電樞9之直線運動方向上產生移動磁場。 藉由未圖示之控制裝置而控制線圈3中流通之電流。於基 座1組裝有對電樞9之位置進行檢測的線性標度尺^控制裴 ❹置對由線性標度尺檢測出之電樞9之位置資訊及速度資訊 進行反饋，算出與目標值之差分，以電樞9之位置及速度接 近目標值之方式使電流於三相線圈3a、3b、3c中流通。 磁心11具有於複數個線圈3之排列方向上細長地延伸之 板狀基部板lid、及自基部板lld朝三相_ 各自之内側突出的複數個梳齒Ua、m、u卜基部板山 之上表面與散熱座12之下矣而拉餓、铉如 卜表面接觸。複數個lla、llb、u 於與基部板lid正交之方向突出 鋼等之磁性體。 ^^出‘11之材質例如為發 有在電樞體形狀，料於其上表面形成 仃 向上細長地延伸的複數個样資12a。葬 由形成複數個槽溝12a而於散 类曰溝12a藉 加表面積之冷卻鰭片。散執心、9 12之上表面形成用以増 合金所構成。 、係由熱傳導率高之銘或紹 圖6表示倒i狀態之電;te9 098104165 之立體圖（為了容易觀察到線 13 200945737 軸14，沿電樞9之移動方向切斷線圈3)。線圈3係於鋼之 周圍環狀地纏繞包覆有絕緣祺之導線而成者。導線彼此藉由 包覆於外側之絕緣膜_持絕緣。然而，—般認為當將線圈 3插入於梳齒lia〜11c時，線圈3與梳齒Ua〜Uc不會藉 由導線之絕緣膜而絕緣。原因在於，若將線圈3直接纏繞於 梳齒11a〜11c，則導線之絕緣膜會受損，使梳齒&〜仏 與導線導通。因此，不將線圈直接纏繞於梳齒丨^〜丨^^ 而是於梳齒11a〜11c與線圈3之間，插入用以使該等之間 絕緣之線轴14。 曰 圖7表示線軸14之立體圖。線軸14係由包圍梳齒周圍 框形狀線軸本體Ha、及設置於線軸本體14a之軸線方向之 部之凸緣部14b所構成。凸緣部14b介設於線圈3之軸線蠕 向端面與磁心η之基部板lld之間，用以使該等之間絕方 為了達到祕之目的，f知㈣稱作麵χ(註氏。 絕緣紙。該絕緣紙之屋# & & , 彡紙之 能力，雖然薄但是具右 特之絕緣 形時，將絕緣紙逐層縫姑 緣紙之情 Μ層纏繞於梳齒lla〜llc之周目 緣紙之周圍纏繞線圈卩处 並於絕 圈3。然而，若非手動作業 齒11a〜11c之周圍纏缺决於梳 国纒繞絕緣紙。因賴絕緣紙 瑣，故使用完全包覆梳# n ” 〈作業較繁 復锍齒11a〜llc周圍之成形品 來代替絕緣紙。在將飨固Q 軸14 f線圈3纏繞於線軸14周圍之 14嵌入至梳齒。藉由將 便線軸 線軸14設為絕緣體，可使線 098104165 200945737 梳齒1 la〜llc絕緣。 因線軸14為成形品，故該線軸14至少具有〇. 2匪、0. 3 mm、〇. 5 mm等之厚度。若利用耐熱性之液晶聚合物（熱傳導 率為0.2W/(m.K)左右）射出成形線轴14，則熱傳導率低且 厚度變厚’因此熱電阻變大。若線軸14之熱電阻變大，則 無法將線圈3之熱量散逸至磁心11。因此，線軸14係使用 熱傳導率為2W/(m.K)以上，較佳為6W/(m.K)以上之材料。 © 線圈3與線軸14接觸。線轴14與磁心11接觸，磁心11 亦與散熱座12接觸。因此，產生自線圈3之熱量會傳遞至 線轴14、磁心丨1、及散熱座12,然後自散熱座12之冷卻 績片散逸至大氣中。若將線軸14之熱傳導率設為2 W/(m · K)以上’則可獲得較纏繞厚度為線轴14之1/10左右之絕緣 紙時更局之推力。若產生相同推力 ，則由於線圈11之發熱 受到抑制’故在熱膨脹等之熱影響成為問題而不欲過度地提 〇⑧溫度等之要求高精度之料巾變得有效。 線軸14之材料係將絕緣性之金屬氧化物粒子作為填充材 料混合於熱塑性樹脂中而成之成形材料。藉由將混合有金屬 .氧化物粒子之熱塑性樹脂進行射出成形而製造線轴14。 如®1 9所示’金屬氧化物粒子係由平均粒徑經分級處於 範圍之小直徑金屬氧化物粒？ β、及平均粒裡經 分級處於5〜範圍之大直徑金屬氧化物粒子人混合而 成。金屬氧化物粒子B之粒根約為金屬氡化物粒子A之粒徑 098104165 15 200945737 :1/10 °亦可於金屬氧化物粒子B更進—步混合粒徑約為 ” 1/10之金屬氧化物粒子C。金屬氧化物粒子A與金屬氧 化物粒子B之分布之重叠部分d占整體之質量百分比為概The direction orthogonal to the direction (the direction orthogonal to the plane of the drawing) is magnetized to the N pole and the S pole. When the N pole and the § pole are alternately formed in the longitudinal direction of the field magnet 2, the magnetic poles on the surface of the plate magnet 19 become magnetic poles opposite to the magnetic poles of the adjacent plate magnets 19. As shown in Fig. 1, a block 6 of 098104165 200945737 linear guide is slidably assembled on a pair of left and right rails 5, respectively. The door type combined top plate 7 spans the left and right blocks 6. An armature 9 is suspended from the lower surface of the combined top plate 7. The top plate 7 has a top frame portion 7a that is elongated in the width direction, and a pair of leg portions 7b that are provided at both ends in the width direction of the top frame portion 7a and that are lowered downward. A linear guide block 6 is assembled at the lower end of the leg portion 7b. An armature 9 is assembled on the lower surface of the top frame portion 7a. A moving body is assembled on the upper surface of the top frame portion 7a. The block 6 is formed in a saddle shape across the rail 5. In the present embodiment, two blocks 6 are assembled for one rail 5. A load rolling element rolling groove that faces the rolling element rolling groove of the road 5 is formed in the block 6, and a circulating path of the ring-shaped rolling body for circulating the rolling elements is provided. A plurality of rolling elements are arranged and accommodated in the rolling body circulation path of the block 6. When the block 6 slides relative to the road 5, the rolling elements interposed between the rolling element rolling grooves of the track 5 and the load rolling body rolling grooves of the block 6 perform a rolling motion. At the same time, the rolling elements circulate in the loop-shaped rolling element circulation path. By the rolling motion of the rolling body, the frictional resistance of the block 6 when sliding relative to the rail 5 can be reduced. 4 and 5 show detailed views of the armature 9. The armature 9 includes a three-phase coil 3 (3a, 3b, 3c) opposed to the field magnet 2, a core 11 for enhancing the magnetic field generated by the coil 3, and heat dissipation for dissipating heat generated from the coil 3 to the atmosphere. Block 12. The coil 3 is formed by winding a wire around the comb teeth 11a, lib, 11c of the core 11 (positive 098104165 12 200945737, which is said to cover the comb shaft 14), and in the width direction of the electric frame 9. Formed into a slender loop. The three-phase coils 3a, 3b, 3c are adjacently arranged in the direction of linear motion of the armature 9. When the three-phase coils 3a, 3b, and 3c composed of the u.V.W phase are distributed, the phase is every 12 turns. Different three phases, when alternating current, generate a moving magnetic field in the direction of linear motion of the armature 9. The current flowing through the coil 3 is controlled by a control device (not shown). A linear scale measuring device for detecting the position of the armature 9 is assembled on the base 1 to feedback the position information and speed information of the armature 9 detected by the linear scale, and the target value is calculated. The difference is such that current flows through the three-phase coils 3a, 3b, and 3c so that the position and speed of the armature 9 approach the target value. The core 11 has a plate-like base plate lid that extends elongatedly in the direction in which the plurality of coils 3 are arranged, and a plurality of comb teeth Ua, m, and u which protrude from the base plate 11d toward the inner side of each of the three phases _ It is in contact with the heat sink 12 and is hungry and in contact with the surface. The plurality of lla, llb, and u protrude from the magnetic body such as steel in a direction orthogonal to the base plate lid. The material of the '11' is, for example, a plurality of samples 12a which are formed in the shape of an armature body and which are formed to be elongated upwardly on the upper surface thereof. The cooling fins are formed by borrowing a plurality of grooves 12a and borrowing surface areas from the scattered trenches 12a. Dissipate, the surface above 9 12 is formed by a bismuth alloy. It is a high-temperature conductivity or a figure 6 showing the state of the inverted i state; a perspective view of the te9 098104165 (in order to easily observe the line 13 200945737 the axis 14, the coil 3 is cut along the direction of movement of the armature 9). The coil 3 is formed by winding a wire covered with an insulating crucible in a ring shape around the steel. The wires are insulated from each other by an insulating film _ coated on the outside. However, it is generally considered that when the coil 3 is inserted into the comb teeth lia 11 to 11c, the coil 3 and the comb teeth Ua to Uc are not insulated by the insulating film of the wire. The reason is that if the coil 3 is directly wound around the comb teeth 11a to 11c, the insulating film of the wire is damaged, and the comb teeth & Therefore, the bobbin 14 for insulating between the comb teeth 11a to 11c and the coil 3 is inserted without directly winding the coil around the comb teeth.曰 Figure 7 shows a perspective view of the spool 14. The bobbin 14 is composed of a flange portion 14b that surrounds the frame-shaped bobbin main body Ha around the comb teeth and a portion that is provided in the axial direction of the bobbin main body 14a. The flange portion 14b is interposed between the creeping end surface of the axis of the coil 3 and the base plate 11d of the core η for the purpose of achieving the secret between the two, so that it is called a facial enamel. Insulating paper. The insulating paper house # && & 彡 之 能力 能力 虽然 虽然 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力 能力The circumference of the paper is wrapped around the coil and is in the loop 3. However, if the non-manual working teeth 11a to 11c are wound around the combing paper, the insulating paper is used. Comb #n" <The operation is more complicated than the molded article around the ridges 11a to 11c. The insulating paper is replaced by the entangled Q-axis 14f coil 3 around the bobbin 14. The axis shaft 14 is an insulator, and the wire 098104165 200945737 comb teeth 1 la to llc can be insulated. Since the bobbin 14 is a molded product, the bobbin 14 has a thickness of at least 2 匪, 0.3 mm, 〇 5 mm, and the like. If the heat-resistant liquid crystal polymer (having a thermal conductivity of about 0.2 W/(mK)) is injected into the forming bobbin 14, the heat is applied. When the conductivity is low and the thickness is increased, the thermal resistance is increased. If the thermal resistance of the bobbin 14 is increased, the heat of the coil 3 cannot be dissipated to the core 11. Therefore, the bobbin 14 has a thermal conductivity of 2 W/(mK) or more. Preferably, the material is 6 W/(mK) or more. © The coil 3 is in contact with the bobbin 14. The bobbin 14 is in contact with the core 11, and the core 11 is also in contact with the heat sink 12. Therefore, heat generated from the coil 3 is transmitted to the wire. The shaft 14, the core 丨 1, and the heat sink 12 are then dissipated into the atmosphere from the cooling sheet of the heat sink 12. If the thermal conductivity of the bobbin 14 is set to 2 W/(m · K) or more, the winding can be obtained. When the insulating paper having a thickness of about 1/10 of the bobbin 14 is more thrust, if the same thrust is generated, since the heat generation of the coil 11 is suppressed, the heat influence such as thermal expansion becomes a problem and it is not desired to excessively raise it. A material that requires high precision such as temperature is effective. The material of the bobbin 14 is a molding material obtained by mixing insulating metal oxide particles as a filler in a thermoplastic resin, by mixing metal oxide particles. Injection molding of thermoplastic resin Manufacture of bobbin 14. As shown in Fig. 19, 'metal oxide particles are oxidized by small-diameter metal oxide particles having a mean particle size in a range of ??, and large-diameter metals having an average particle size of 5 to 5 The particles of the metal oxide particles B are about the particle size of the metal halide particles A 098104165 15 200945737 : 1/10 ° can also be further mixed in the metal oxide particles B. 1/10 of the metal oxide particles C. The overlapping portion d of the distribution of the metal oxide particles A and the metal oxide particles B accounts for the mass percentage of the whole
以下’較佳為1%以下。當為1%以下時，金屬氧化物粒子A 之分布與金屬氧化物粒子B之分布幾乎不重疊，整體之分布 曲線呈現不連續。 备以上述方式設定金屬氧化物粒子A、B之平均粒徑則 如圖1G騎’大直徑之金屬氧録粒子A彼關之樹脂之 1隙由j直;^之金屬氧化物粒子B所填充。因此，可提高金 屬氧化物粒子A、B之填充率。由於可經由填充率經調高之 金屬氧化物粒子A、B來傳遞熱量，故使熱傳導率提高。此 處/若金屬氧化物之粒徑小㈣.5 _，難子之塊合狀態 (右干粒子如麵團般結塊）會變得顯著，分散效率變差，結果 導致熱傳導效率惡化，因此較不佳。又，絲徑大於20 _， 則薄J成形性受損，僅可製作厚度較大者。具體而言，因難 以形成1 nrn以下之厚度，故熱電阻變大，因此較不佳。供 ,、’、量透過之構件厚度必須較薄。熱傳導即使優異，若材質之 厚度變大’結果會導致熱電阻變大，而損害散熱效果。 作為絕緣性之金屬氧化物粒子之種類，可列舉出氧化鋁 (Ah〇3)、二氧化矽（Si〇2)、氧化锆（Zr〇2)、氧化鈦（Ti〇2)、 氧化鎂（Mg0)、富鋁紅柱石（3Ah〇3· 2Si0〇、锆英石（尤其為 ΖΓ〇2 · Si〇2)、堇青石（2MgO · 2Al2〇3 · 5Si〇2)、氧化錳（Mn〇2)、 098104165 200945737 氧化鐵⑽必）、及氧化鉛（⑽等，但並不僅受限於該等金 屬氧化物。若考慮到提高線性馬達之散熱，則亦可於絕緣性 之金屬氧化物粒子之中使用熱傳導率為i w/(m.K)以上者， •例如使用氣化石夕（Si亂）、碳化石夕（SiC)、氮化蝴⑽）、及氣 . 化鋁（A1N)等。 金屬氧化物粒子相對於成形材料整體體積之體積百分比 為至少50%以上，較佳為處於55〜65%之範圍。若低於50%， ❹則熱傳導率顯著地降低。若超過5〇%，職傳導率開始升 兩，但·至65%之範®為適於兼顧射出成形巾之流通性與 熱傳導率之範圍。若超過65%，則成形流通性會急遽地降 低’引起無法成形薄壁且無法成形複雜之三維形狀等之弊 端’因此較不佳。 所謂熱塑性樹脂係指可熔融成形之合成樹脂，作為其具體 例，例如可列舉出選自非液晶性半芳香族聚醋、非液晶性全 ❹芳香族聚酉旨等之非液晶性聚醋、液晶聚合物（液晶性聚酿、 液晶性聚醋酿胺等）、聚碳酸脂、脂肪族聚酿胺、脂肪族— 芳香族聚醯胺、全芳香族聚醯胺等之聚醯胺、聚甲醛、聚醯 亞胺、聚醯胺、聚苯并Μ、聚酮、聚_酮、㈣明、聚 賴、«醯亞胺、改質聚苯醚、㈣、聚亞芳基硫、聚丙 稀、聚乙烯等之烯烴系聚合物、乙稀/丙稀共聚物等之婦煙 系共聚物、丙烯腈-丁二婦_笨乙稀（燃，心1〇沿仙 Butadiene Styrene)、丙烯腈~笨乙烯（AS，Acrylonitrile 098104165 17 200945737The following ' is preferably 1% or less. When it is 1% or less, the distribution of the metal oxide particles A and the distribution of the metal oxide particles B hardly overlap, and the overall distribution curve is discontinuous. The average particle diameter of the metal oxide particles A and B is set in the above manner, and as shown in FIG. 1G, the 1 gap of the resin of the large-diameter metal oxide recording particle A is filled with the metal oxide particles B. . Therefore, the filling ratio of the metal oxide particles A and B can be increased. Since the heat can be transferred through the metal oxide particles A and B whose filling rate is increased, the thermal conductivity is improved. Here, if the particle size of the metal oxide is small (4).5 _, the block state of the hard-toned (the right dry particles agglomerate like a dough) becomes remarkable, the dispersion efficiency is deteriorated, and as a result, the heat transfer efficiency is deteriorated, so Not good. Further, if the wire diameter is larger than 20 Å, the thin J formability is impaired, and only a thicker one can be produced. Specifically, since it is difficult to form a thickness of 1 nrn or less, the thermal resistance becomes large, which is not preferable. The thickness of the members of the supply, and the amount must be thin. Even if the heat conduction is excellent, if the thickness of the material becomes large, the result is that the thermal resistance becomes large and the heat dissipation effect is impaired. Examples of the type of the insulating metal oxide particles include alumina (Ah〇3), cerium oxide (Si〇2), zirconia (Zr〇2), titanium oxide (Ti〇2), and magnesium oxide ( Mg0), mullite (3Ah〇3·2Si0〇, zircon (especially ΖΓ〇2 · Si〇2), cordierite (2MgO · 2Al2〇3 · 5Si〇2), manganese oxide (Mn〇2) ), 098104165 200945737 iron oxide (10), and lead oxide ((10), etc., but not limited to these metal oxides. If it is considered to improve the heat dissipation of the linear motor, it can also be used for insulating metal oxide particles. In the case where the thermal conductivity is iw/(mK) or more, • for example, gasification (Si chaos), carbon carbide (SiC), nitriding (10), and aluminum (A1N) are used. The volume percentage of the metal oxide particles to the entire volume of the shaped material is at least 50% or more, preferably in the range of 55 to 65%. If it is less than 50%, the thermal conductivity is remarkably lowered. If it exceeds 5%, the occupational conductivity starts to rise by two, but the range of 65% is suitable for the range of flowability and thermal conductivity of the injection molding roll. When it exceeds 65%, the molding fluidity is drastically lowered, which is a disadvantage of the fact that it is impossible to form a thin wall and it is impossible to form a complicated three-dimensional shape. The term "thermoplastic resin" refers to a synthetic resin which can be melt-molded, and specific examples thereof include non-liquid crystalline polyester selected from the group consisting of non-liquid crystalline semi-aromatic polyester and non-liquid crystalline wholly aromatic polycondensate. Liquid crystal polymer (liquid crystal polymer, liquid crystal polyacetamide, etc.), polycarbonate, aliphatic polyamine, aliphatic-aromatic polyamide, wholly aromatic polyamine, polyamine, poly Formaldehyde, polyimine, polyamine, polybenzopyrene, polyketone, poly-ketone, (four) Ming, poly La, «yimide, modified polyphenylene ether, (d), polyarylene sulfide, polypropylene , olefin-based polymers such as polyethylene, women's cigarette copolymers such as ethylene/acrylic copolymer, acrylonitrile-butadiene _ stupid ethylene (burning, heart 1 〇Butadiene Styrene), acrylonitrile~ Stupid ethylene (AS, Acrylonitrile 098104165 17 200945737
Styrene)、聚苯乙烯等之笨乙烯系共聚物、曱基内缔 脂、聚酯醚彈性體、聚酯彈性體、聚醯胺彈性體箄 酸樹 守之彈性研 之1種或2種以上之混合物’但通常較佳使用尼韻 ^匕、聚笨 硫（PPS ’ Po 1 ypheny 1 ene Su 1 f i de)、液晶聚合物（Lcp，L i 收.Styrene), a stupid vinyl copolymer such as polystyrene, a fluorene-based inner lining, a polyester ether elastomer, a polyester elastomer, and a polyamide-elastomer phthalic acid Mixture 'but it is usually better to use Niyun, polystyrene (PPS 'Po 1 ypheny 1 ene Su 1 fi de), liquid crystal polymer (Lcp, Li receiving).
Crystal Polymer)或聚對苯二甲酸乙二賴 Polyethylene Terephthalate) ° ◎ 對於熱塑性樹脂之電絕緣性，其電阻率較佳為iq12 ω · cm以上，絕緣破壞強度較佳為1〇 kv/mnm上，又，其教傳 導率最小較佳為丨W/On.KU最大較佳為則/〇η·κ)左右。 最大為 • · ·、 將混合有以上所揭示之金屬氧化物粒子之熱塑性樹脂進 行射出成形’藉此可製造熱傳導率為2w/(m.K)以上，例 如為 6W/(ra.K)、8W/(m.K)、l0W/(m.K)、 20 W/(m · K)之線軸 14。 如圖5所示，纏繞有線圈如〜化 ^ 151 、、11 線軸14藉由黏著劑而 ◎ 行固二二八之梳齒1 la〜1 lc。然而’若僅藉由黏著劑進 ㈣疋，顺合不敎，無法確信線轴14 心1卜若線圈3與磁心u之黏 疋王固疋於 流通有電流時’會產生線圈 磁充分:則當線圈3中 因此，在將線轴u黏著於磁心U:U移動之問題。 磁心1卜線軸14、線圈3成形 < 利用成形體16將 覆線圈3,以防其露出4 °藉由成形體16來包 成形體16必須具有機械強度。而且，二#於磁心U， _165 該成形體16必須為絕 18 200945737 緣體。原因在於’既存在電流自線圈3傳遞至作為導體之場 磁鐵2之可祕，亦存在電流自線圈3流經線轴μ而傳遞 ^梳齒Ua〜llc之前端之可能性。當成形體16為絕緣體 時，存在成形體16之散熱特性變差之傾向。若該成形體16 之散熱特性不佳，則線圈3發出之熱量會滞留於成形體16 之内部’導致線圈3之溫度上升。因此，必須提高成形體 16之散熱特性，以使線圈3之熱量散逸至大氣中。 © 成形體16之材料與線軸14相同地係將絕緣性之金屬氧化 物粒子作為填充材料混合於熱雜樹脂喊之成形材料。藉 由將混合有絕緣性之金屬氧化物粒子之熱塑性樹脂進行射 出成形而製造成形體16，或者藉由澆鑄方式而製造成形體 16’該澆鑄方式係將混合有絕緣性之金屬氧化物粒子之熱硬 化性樹脂注入至框狀之模具17(參照圖8)而進行。 將成形體16進行射出成形時之金屬氧化物粒子之構成及 ❹種類、熱塑性樹脂之種類及熱傳導率，與將線軸14進行射 出成形時相同。將成形體進行澆鑄時之金屬氧化物粒子之構 成及種類，與將線軸14進行射出成形時相同。將成形體進 行澆鑄時所使用之熱硬化性樹脂係具有在熱加熱時會軟 化、在冷卻時會硬化之線狀高分子構造之物質。例如可列舉 出選自環氧樹脂、聚胺基曱酸酯、苯酚樹脂、脲樹脂（尿素 樹脂）、三聚氰胺樹脂之1種或2種以上之混合物。 將混合有以上所揭示之金屬氧化物粒子之熱塑性樹脂進 098104165 200945737 行射出成形，或將混合有金屬氧化物粒子之熱硬化性樹脂進 行澆鑄’藉此可製造出熱傳導率為2 w/(m· κ)以上，例如 為 6 W/(m · Κ)、8 W/(m · Κ)、1〇 w/(m · Κ).....最大為 20 W/(m · K)之成形體。 藉由線軸14及成形體16使用熱傳導率為6 w/(m · κ)以 上之成形材料’可將線圈3中流通之電流增大4倍左右（即 使電流增大1.4倍，線圈3之溫度亦不會產生變化），而可 將扁平型之線性馬達之推力增大14倍左右。推力提高4〇% 係劃時代之成就。若使用該技術，則可獲得外形精簡但可輸 出世界上最大推力之扁平型之線性馬達。 又，線轴14及成形體16之線膨脹係數（流通/直角）設定 為10x10以上且為30χ10-6以下。線軸14及成形體 16之線 膨脹係數比樹脂（120xl(T6)之線膨脹係數小丨位數，與鋼（11 〜13x10 6)、銅（19〜20x10—6)、及鋁（22〜23χ10_6)等金屬之 線膨脹係數接近。由於可使溫度上升時之線轴14及成形體 16之展距與線圈3、磁心11之展距大致相等，故可保持該 等之接觸。因此，可防止因溫度上升而於該等之間產生真空 間隙或空氣層’導致熱量難以傳遞之情形。 圖11表示本發明第二實施形態之桿型線性馬達之立體 圖。該實施形態之線性馬達用於藉由單軸之致動器而使電子 零件等之移動體於單軸方向上移動，該單軸之致動器中，其 桿21(軸）相對於成形體（外罩）22而於其軸線方向上移動。 098104165 20 200945737 二體=w i述線性馬達例如用於將晶片狀之電子零件組裝 ' 置之貼片機（chip mounter)之主軸。該線性馬達有 時僅使用於單轴之致動器，有時為了提高作業效率 ，亦將複 數個線性料並触合Μ作多軸之致動器。 生馬達藉由場磁鐵23之磁場與線圈24中流通之電流而 獲付用以使桿21進行直線運動之力。桿21之厢被於轴線 ❹Crystal Polymer) or Polyethylene Terephthalate) ◎ For the electrical insulation of thermoplastic resins, the electrical resistivity is preferably iq12 ω · cm or more, and the dielectric breakdown strength is preferably 1 〇 kv / mnm. Further, it is preferable that the teaching conductivity is at least 丨W/On. KU is preferably about 〇η·κ). The maximum is: · · The injection molding of the thermoplastic resin in which the metal oxide particles disclosed above are mixed' can thereby produce a thermal conductivity of 2 w / (mK) or more, for example, 6 W / (ra. K), 8 W / Spool 14 of (mK), l0W/(mK), 20 W/(m · K). As shown in Fig. 5, a coil such as a coil, such as a 151, and an elbow 14 is wound by an adhesive, and the comb teeth 1 la to 1 lc are fixed. However, 'If you only use the adhesive to enter (4) 疋, you can't be sure that the bobbin 14 is the heart. If the coil 3 and the core u are stuck, the coil will be magnetically full: Therefore, in the coil 3, there is a problem in that the bobbin u is adhered to the magnetic core U:U. The core 1 is formed by the bobbin 14 and the coil 3. The coil 3 is covered with the molded body 16 to prevent it from being exposed by 4 °. The molded body 16 is required to have a mechanical strength by the molded body 16. Moreover, in the case of the core U, _165, the formed body 16 must be a rim 18 200945737. The reason is that there is a possibility that the current is transmitted from the coil 3 to the field magnet 2 as a conductor, and there is a possibility that a current flows from the coil 3 through the bobbin μ to transfer the front ends of the comb teeth Ua to Llc. When the molded body 16 is an insulator, the heat dissipation characteristics of the molded body 16 tend to be deteriorated. If the heat dissipation characteristics of the molded body 16 are not good, the heat generated by the coil 3 will remain inside the molded body 16, causing the temperature of the coil 3 to rise. Therefore, it is necessary to increase the heat dissipation characteristics of the formed body 16 so that the heat of the coil 3 is dissipated into the atmosphere. © The material of the molded body 16 is the same as the bobbin 14 in which insulating metal oxide particles are mixed as a filler to the molding material of the hot resin. The molded body 16 is produced by injection molding a thermoplastic resin in which insulating metal oxide particles are mixed, or a molded body 16' is produced by casting. The casting method is to mix insulating metal oxide particles. The thermosetting resin is injected into the frame-shaped mold 17 (see FIG. 8). The configuration of the metal oxide particles and the type of the metal oxide, the type of the thermoplastic resin, and the thermal conductivity when the molded body 16 is injection-molded are the same as those in the case where the bobbin 14 is injection-molded. The composition and type of the metal oxide particles when the molded body is cast are the same as those in the case where the bobbin 14 is injection molded. The thermosetting resin used for casting the molded body has a linear polymer structure which is softened during heat heating and hardens during cooling. For example, one or a mixture of two or more selected from the group consisting of an epoxy resin, a polyamino phthalate, a phenol resin, a urea resin (urea resin), and a melamine resin may be mentioned. The thermoplastic resin mixed with the metal oxide particles disclosed above is injected into a 098104165 200945737 row, or a thermosetting resin mixed with metal oxide particles is cast, thereby producing a thermal conductivity of 2 w/(m). · κ) or more, for example, 6 W/(m · Κ), 8 W/(m · Κ), 1〇w/(m · Κ).....maximum 20 W/(m · K) Shaped body. By using the molding material ' having a thermal conductivity of 6 w/(m · κ) or more by the bobbin 14 and the molded body 16 , the current flowing in the coil 3 can be increased by about 4 times (even if the current is increased by 1.4 times, the temperature of the coil 3) There will be no change, and the thrust of the flat linear motor can be increased by about 14 times. Increased thrust by 4〇% to the achievements of the era. If you use this technology, you can get a flat linear motor that is compact in shape but can output the world's largest thrust. Further, the linear expansion coefficient (flow/right angle) of the bobbin 14 and the molded body 16 is set to 10 x 10 or more and 30 χ 10-6 or less. The linear expansion coefficient of the bobbin 14 and the formed body 16 is smaller than the linear expansion coefficient of the resin (120xl (T6), with steel (11 to 13x10 6), copper (19 to 20x10-6), and aluminum (22 to 23χ10_6). The linear expansion coefficient of the metal is close to each other. Since the spread of the bobbin 14 and the molded body 16 when the temperature rises is substantially equal to the spread of the coil 3 and the core 11, the contact can be maintained. Fig. 11 is a perspective view showing a rod type linear motor according to a second embodiment of the present invention, in which a vacuum gap or an air layer is generated between the two due to an increase in temperature. The linear motor of the embodiment is used for The uniaxial actuator moves a moving body such as an electronic component in a uniaxial direction, and the uniaxial actuator has a rod 21 (shaft) in the axial direction thereof with respect to the molded body (cover) 22 098104165 20 200945737 Two-body = a linear motor, for example, used to assemble a wafer-shaped electronic component into a spindle of a chip mounter. The linear motor is sometimes used only for a single-axis actuator. Sometimes in order to improve work efficiency, The plurality of linear materials are brought into contact with each other as a multi-axis actuator. The raw motor receives a force for linearly moving the rod 21 by the magnetic field of the field magnet 23 and the current flowing in the coil 24. The car is on the axis
方向疊層之複數個線圈24所包圍。換言之，桿21貫穿經疊 層之線圈24。 圖丨2表不線性馬達之場磁鐵23與線圈24之位置關係。 於矛干21内之中空空間中，圓盤狀之複數個磁鐵叫分段磁 鐵）彼此以同極相對向之方式，即以N極與N極相對向、$ 極與S極相對向之方式疊層作為場磁鐵23。於桿21之周圍 疊層有包圍桿21之複數個線圈24。複數個線圈24係由包 sU V W相之二相線圈所構成。若線圈24中流通有相位 每隔120不同之二相電流，則會產生沿線圈％之軸線方向 移動之移動磁場。桿21内之場磁鐵23藉由移動磁場而獲得 推力，並與移動磁場之速度同步地相對於線圈24相對地進 行直線運動。 如圖11所示，線性馬達之桿21由成形體22所支持成為 可於桿2i之軸線方向上移動。線圈單元係保持於線圈固持 器25’該等線圈單元及線圈固持器25由成形體心斤包覆。 桿21例如由獨鋼等之非磁性材料所構成，且如管般具 098104165 200945737 有中km如上所述’於桿21之中以間中，以彼此 同=相對向之方式疊層圓柱狀之複數個磁鐵叫分段磁 =磁鐵31之間介設有例如由鐵等之磁性體所構成之極 =7(雜塊體）。可藉由插人_打而使場磁鐵μ所形 成之磁场接近於正弦波。 技線圈24係將導線捲繞成螺旋“成者，且保持於線圈固 持器25。線圈24及線圈固持器25由成形㈣所包覆。於 =2Γ形編咖㈣以提高觀性。於成 频22加工出用以組錄對象零件之螺紋挪。因被组裝 於對象零件，故要求成形體22具有較高之機械強度。因必 須保持與線圈24之絕緣，故要求成形體22具有較高之絕緣 性。 成形體22之材料與上述第一實施形態之成形體相同地， 係將絕緣性之金屬氧化物粒子作為填充材料混合於敎塑性 樹脂而成之成形材料。藉由將混合有絕緣性之金屬氧化物粒 子的熱塑性樹脂進行射出成形而製造出成形體22。將線圈 24及線圈固持器25安置於射出成形之模具中，藉由流出成 形材料之嵌人成形而使成形體22與_ 24及線圈固持器 25成形為一體。 當將成形體22進行射出成形時，金屬氧化物粒子之構成 及種類、熱錄胞旨之_及熱料率，健將線轴14進 行射出成形時相同。藉由將混合有金屬氧化物粒子之熱塑性 098104165 22 200945737 樹脂進行射ϋι成形，可製造出熱傳導率為2w/(m· κ)以上， 例如為 6W/(m.K)、8W/(m.K)、1〇W/(m.K)、.··、最大 為20 W/(m · K)之成形體22。 桿21於線性馬達之作動中處於懸浮於線圈24 0之狀態。 為了支持桿21之直線運動，設置有金屬製之襯套找。概套 28固疋在设置於成形體22兩端之端構件29。 ® 13表示保持於線圈固持器25之線圏單元。線圈單元係 ❹疊層複數個將導線捲繞成螺旋狀之線圈24而成纟，例如係 疊層數十個線圈24而成者。線圈24之導線恤必須逐根連 接。為了簡化線圈24之導線24a之佈線而使用絕緣基板 26。於絕緣基板26形成有用以對複數個線圈24進行佈線之 導電圖案。導電圖案係將U相彼此之線圈、¥相彼此之線圈、 W相彼此之線圈連接形成。 圖14表示保持線圈24的線圈固持器25之詳細圖。因必 G 須使相鄰接之線圈24彼此絕緣，故於線圈24之間介設有樹 脂製之間隔件部25b。間隔件部25b與線圈24之正面形狀 同樣地形成為圓環形狀。間隔件部25b 一體地形成於在線圈 24之排列方向上細長地延伸的板狀固持器本體部25a。The plurality of coils 24 are surrounded by the direction stack. In other words, the rod 21 extends through the coils 24 of the stack. Figure 2 shows the positional relationship between the field magnet 23 and the coil 24 of the linear motor. In the hollow space in the spear 21, a plurality of disc-shaped magnets are called segment magnets, and the opposite poles are opposite to each other, that is, the N pole and the N pole are opposite, and the pole and the S pole are opposite each other. The laminate is used as the field magnet 23. A plurality of coils 24 surrounding the rod 21 are laminated around the rod 21. The plurality of coils 24 are composed of two-phase coils of the sU V W phase. When a two-phase current having a phase of 120 different phases flows in the coil 24, a moving magnetic field moving in the axial direction of the coil % is generated. The field magnet 23 in the rod 21 obtains a thrust by moving a magnetic field and linearly moves relative to the coil 24 in synchronization with the speed of the moving magnetic field. As shown in Fig. 11, the rod 21 of the linear motor is supported by the molded body 22 so as to be movable in the axial direction of the rod 2i. The coil unit is held by the coil holder 25'. The coil unit and the coil holder 25 are covered by the molded body. The rod 21 is made of, for example, a non-magnetic material such as a single steel, and has a medium-like 098104165 200945737, as described above, in the middle of the rod 21, and is stacked in a mutually opposite manner. A plurality of magnets called segmented magnets = magnets 31 are interposed between poles of magnetic bodies such as iron = 7 (heteroblocks). The magnetic field formed by the field magnet μ can be made close to a sine wave by inserting a punch. The technical coil 24 winds the wire into a spiral "and is held in the coil holder 25. The coil 24 and the coil holder 25 are covered by the forming (four). In the =2 Γ-shaped coffee (4) to improve the visibility. The frequency 22 is used to machine the thread for the object to be recorded. Since it is assembled to the target part, the molded body 22 is required to have high mechanical strength. Since it is necessary to maintain insulation from the coil 24, the molded body 22 is required to be The material of the molded article 22 is a material obtained by mixing insulating metal oxide particles as a filler with a ruthenium plastic resin, similarly to the molded body of the first embodiment. The thermoplastic resin of the insulating metal oxide particles is injection-molded to produce the molded body 22. The coil 24 and the coil holder 25 are placed in a mold for injection molding, and the molded body 22 is formed by inlay molding of the outflow molding material. The _ 24 and the coil holder 25 are integrally formed. When the molded body 22 is injection-molded, the composition and type of the metal oxide particles, the heat recording cell _ and the hot material rate, the health bobbin 14 The same is true for injection molding. By thermally molding the thermoplastic 098104165 22 200945737 resin mixed with metal oxide particles, the thermal conductivity can be 2w/(m·κ) or more, for example, 6W/(mK), 8W/. (mK), 1〇W/(mK), .., and a molded body 22 of up to 20 W/(m · K). The rod 21 is suspended in the coil 24 0 during the operation of the linear motor. The linear movement of the rod 21 is provided with a metal bushing. The outer sleeve 28 is fixed to the end member 29 provided at both ends of the molded body 22. The pin 13 indicates the wire loop unit held by the coil holder 25. The crucible is formed by laminating a plurality of coils 24 wound in a spiral shape, for example, by laminating dozens of coils 24. The lead wires of the coils 24 must be connected one by one. To simplify the wires 24a of the coils 24 The insulating substrate 26 is used for wiring. A conductive pattern for wiring a plurality of coils 24 is formed on the insulating substrate 26. The conductive pattern is formed by connecting coils of U phases, coils of the phases, and coils of W phases. 14 denotes the details of the coil holder 25 holding the coil 24. Since the adjacent coils 24 are insulated from each other, a resin spacer portion 25b is interposed between the coils 24. The spacer portion 25b and the front surface of the coil 24 are formed in a circular ring shape. The spacer portion 25b is integrally formed in a plate-shaped holder main body portion 25a that is elongated in the direction in which the coils 24 are arranged.
固持器本體部25a之線圈24之排列方向長度與線圈單元 之全長大致相等，寬度與線圈24之直徑大致相等。於固持 器本體部25a之上表面組裝有絕緣基板26。又，於固持器 本體部25a之侧面設置有突起25c(參照圖13)，該突起25C 098104165 23 200945737 用於在射出成形時將線圈固持器25固定於模具。設置該突 起25c之目的在於防止線圈固持器25因射出成形時之壓力 而發生位置偏移。於固持器本體部25a之下表面形成有與線 圈24之外形形狀相吻合之曲面狀凹處25d 。如圖13所示， 於線圈24巾具有導線24a。為了將導線24a導入至絕緣基 板26之通孔，於固持器本體部25&中與絕緣基板26之通孔 相同之位置處形成有複數個佈線用孔。 如圖14所示’間隔件部25b與線圈24之正面形狀同樣地 形成為圓環狀，並自板狀之本體部25a朝下方突出。間隔件 部25b介設於相鄰接之全部線圈24之間，而且亦設置於線 圈單元之兩端。因此，間隔件部25b之個數較線圈24之數 置多一個。 線圈固持器25之材料與上述第一實施形態之線軸14相同 地’係將絕緣性之金屬氧化物粒子作為填充材料混合於熱塑 性樹脂而成之成形材料。藉由將混合有絕緣性之金屬氧化物 粒子的熱塑性樹脂進行射出成形而製造出線圈。 將線圈固持器25進行射出成形時之金屬氧化物粒子之構 成及種類、熱塑性樹脂之種類及熱傳導率，係與將線轴14 進行射出成形時相同。藉由將混合有金屬氧化物粒子之熱塑 性樹脂進行射出成形，可製造出熱傳導率為2 w/(m· κ)以 上’例如為 6 W/(m · Κ)、8 W/(m · Κ)、10 W/(m · Κ)、…、 最大為20 W/(m · K)之線圈固持器25。 098104165 24 200945737 線圈固持器25及成形體22使用熱傳導率為6 W/(m· κ) 以上之成形材料，藉此可將線圈中流通之電流增大1.4倍左 右（即使將電流增大1·4倍，線圈之溫度亦不會產生變化）， 而可將桿型線性馬達之推力增大1. 4倍左右。推力提高4〇% - 係劃時代之成就。若使用該技術，則可獲得外形精簡但可輸 出世界上最大推力之桿型線性馬達。 又，線圈固持器25及成形體22之線膨脹係數（流通/直角） ❹設定為l〇xl〇_6以上且為30χ1(Γ6以下。線圈固持器25及成 形體22之線膨脹係數比樹脂（12〇χ1〇-6)之線膨脹係數小1 位數，與鋼（11〜13χΐ〇-6)、銅（19〜20x10—6)、及鋁（22〜23 xlO )等金屬之線膨脹係數接近，由於可使溫度上升時之線 圈固持器25及成形體22之展距與線圈24之展距大致相等， 故可保持該等之接觸。因此，可防止因溫度上升而於該等之 間產生真空間隙或空氣層，而導致熱量難以傳遞之情形。進 ❹而，成形體22亦發揮作為電樞之外罩功能，於成形體& •加工出用以組裝於對象零件之螺紋22b(參照圖⑴。即使當 將成形體22組裝於料之金屬製對象零件時，亦可使成形 體22之螺紋22b之組裝間距之展距與對象零件之組裝間距 之展距大致相等，因此可防止對成形體22施加過度之力。 再f本發明不*限於上述實施形態，可於不變更本發明 之主旨之範圍内進行各種變更。於上述扁平型之線性馬達之 實施形態中’電框相對於場磁鐵進行直線運動，但場磁鐵亦 098104165 25 200945737 可進仃直線運動。於上述桿型線性馬達之實施形態中，桿相 對於電樞進行t蚊動，但電框亦可進行直線運動。 [實施例] 於扁平型之線性馬達中，線轴及成形體係使用熱傳導率為 6 W/(m· K)之成形材料。然係，對使電流值I變化為χ1倍、 xl. 15倍、xl. 63倍時之線圈24溫度進行測定。 圖15表示測定結果之圖。該圖中（A)表示電流值1x1倍之 情形’（B)表示電流值Ιχ115倍之情形，（c)表示電流值Ιχ 1. 63倍之情形。圖15之比較例中，線軸係使用液晶聚合物， 成形體係使用環氧樹脂。 如本發明例所示，可知藉由線軸及成形體使用高熱傳導率 之材料而抑制線圈之溫度。又，如圖中（Β)及（C)所示，電流 值ixl· 15倍時之比較例線圈之溫度（91. 5度）與電流值Ιχ 1. 63倍時之本發明例線圈之溫度（91. 2度）大致相等。將本 發明例與比較例相比，可知達超額地施加1.63/1. 15与14 倍之電流。 本說明書係基於2008年2月14日提出申請之曰本專利特 願2008-032518。其全部内容均包含於本申請案。 【圖式簡單說明】 圖1係本發明第一實施形態扁平型線性馬達之立體圖。 圖2係圖1線性馬達之前視圖。 圖3係場磁鐵之俯視圖。 098104165 26 200945737 圖4係電樞之立體圖。 圖5係沿電柩之移動方向的剖視圖。 圖6係倒置狀態之電樞之立體圖。 -圖7係線軸之立體圖。 .圖8係澆鑄所使用之框體。 圖9係表示金屬氧化物之粒子直徑與質量百分比之關係 之圖。 φ 圖10係線軸之放大剖視圖之模式圖。 圖11係本發明第二實施形態桿型線性馬達之立體圖。 圖12係表示線性馬達之磁鐵與線圈之位置關係的圖。 圖13係表示保持於線圈固持器之線圈單元的立體圖。 圖14係線圈固持器之詳細圖（圖中（A)表示前視圖、（B) 表示剖視圖）。 圖15係表示線圈中流通之電流與線圈溫度之關係之圖 Q (圖中（A)表示電流值1x1倍之情形，（B)表示電流值1x1. 15 倍之情形，（C)表示電流值1x1· 63倍之情形）。 【主要元件符號說明】 1 基座 la 底部板 lb 侧壁部 2 場磁鐵 3、3a、3b、3c 線圈 098104165 27 200945737 5 6 7 7a 7b 9 11 11a〜1lc lid 12 12a 14 14a 14b 16 17 19 21 22 22a 22b 23 執道 塊體 結合頂板 頂架部 腳部 電樞 磁心 梳齒 基部板 散熱座 槽溝 線軸 線軸本體 凸緣部 成形體 模具 板狀磁鐵 桿 成形體（外罩） 籍片 螺紋 場磁鐵 098104165 28 200945737 24 線圈 24a 導線 25 線圈固持器 _ 25a 固持器本體部 . 25b 間隔件部 25c 突起 25d 凹處 〇 26 絕緣基板 27 極轨 28 襯套 29 端構件 31 Q 磁鐵 098104165 29The length of the coil 24 of the holder main body portion 25a is substantially equal to the entire length of the coil unit, and the width is substantially equal to the diameter of the coil 24. An insulating substrate 26 is assembled on the upper surface of the holder body portion 25a. Further, on the side surface of the holder main body portion 25a, a projection 25c (see Fig. 13) for fixing the coil holder 25 to the mold at the time of injection molding is provided. The purpose of providing the projection 25c is to prevent the coil holder 25 from being displaced due to the pressure at the time of injection molding. A curved recess 25d that conforms to the outer shape of the coil 24 is formed on the lower surface of the holder body portion 25a. As shown in Fig. 13, the coil 24 has a wire 24a. In order to introduce the lead wire 24a into the through hole of the insulating substrate 26, a plurality of wiring holes are formed in the holder main body portion 25& at the same position as the through hole of the insulating substrate 26. As shown in Fig. 14, the spacer portion 25b is formed in an annular shape in the same manner as the front surface shape of the coil 24, and protrudes downward from the plate-like main body portion 25a. The spacer portion 25b is interposed between the adjacent coils 24 and is also disposed at both ends of the coil unit. Therefore, the number of the spacer portions 25b is one more than the number of the coils 24. The material of the coil holder 25 is the same as that of the bobbin 14 of the first embodiment described above, and is a molding material obtained by mixing insulating metal oxide particles as a filler with a thermoplastic resin. The coil is produced by injection molding a thermoplastic resin in which insulating metal oxide particles are mixed. The composition and type of the metal oxide particles in the injection molding of the coil holder 25, the type of the thermoplastic resin, and the thermal conductivity are the same as those in the case where the bobbin 14 is injection-molded. By injection-molding a thermoplastic resin mixed with metal oxide particles, a thermal conductivity of 2 w/(m·κ) or more can be produced, for example, 6 W/(m·Κ), 8 W/(m·Κ ), 10 W/(m · Κ), ..., a coil holder 25 of up to 20 W/(m · K). 098104165 24 200945737 The coil holder 25 and the molded body 22 use a molding material having a thermal conductivity of 6 W/(m·κ) or more, whereby the current flowing through the coil can be increased by about 1.4 times (even if the current is increased by 1· 4倍左右。 The force of the rod type linear motor is increased by about 1.4 times. Increased thrust by 4〇% - achievements in the era of the system. If you use this technology, you can get a rod-type linear motor that is compact in shape but can output the world's largest thrust. Further, the linear expansion coefficient (flow/right angle) 线圈 of the coil holder 25 and the molded body 22 is set to 10 〇 xl 〇 6 or more and 30 χ 1 (Γ 6 or less. The coefficient of linear expansion of the coil holder 25 and the molded body 22 is larger than that of the resin (12〇χ1〇-6) The linear expansion coefficient is one digit, and it is expanded with steel such as steel (11~13χΐ〇-6), copper (19~20x10-6), and aluminum (22~23 xlO). Since the coefficients are close to each other, since the pitch of the coil holder 25 and the molded body 22 when the temperature rises is substantially equal to the pitch of the coils 24, the contact can be maintained. Therefore, it is possible to prevent the temperature from rising. A vacuum gap or an air layer is generated to cause heat to be transferred. In the meantime, the molded body 22 also functions as an outer cover of the armature, and the molded body & • is machined with a thread 22b for assembling the target part ( Referring to Fig. 1 (1), even when the molded body 22 is assembled to the metal component of the material, the span of the assembly pitch of the thread 22b of the molded body 22 can be made substantially equal to the span of the assembly pitch of the target component, thereby preventing Excessive force is applied to the formed body 22. * The invention is limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention. In the embodiment of the flat type linear motor, the electric frame moves linearly with respect to the field magnet, but the field magnet is also 098104165 25 200945737. In the embodiment of the rod type linear motor described above, the rod is tethered with respect to the armature, but the electric frame can also be linearly moved. [Embodiment] In a flat type linear motor, a bobbin In the molding system, a molding material having a thermal conductivity of 6 W/(m·K) is used. However, the temperature of the coil 24 when the current value I is changed to χ1, xl.15, and xl.63 times is measured. Fig. 15 shows a graph of the measurement results. In the figure, (A) shows a case where the current value is 1x1 times '(B) indicates a current value of Ιχ115 times, and (c) indicates a current value Ιχ1.63 times. In the example, a liquid crystal polymer is used for the bobbin and an epoxy resin is used for the molding system. As shown in the example of the present invention, it is known that the temperature of the coil is suppressed by using a material having a high thermal conductivity by the bobbin and the molded body. ) and (C) When the current value is ixl·15 times, the temperature of the comparative example coil (91. 5 degrees) and the current value Ιχ 1.63 times are substantially equal to the temperature of the coil of the present invention (91. 2 degrees). In comparison with the comparative example, it is known that the current is excessively applied by 1.63/1.15 and 14 times. The present specification is based on the patent application No. 2008-032518 filed on Feb. 14, 2008. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a flat type linear motor according to a first embodiment of the present invention. Fig. 2 is a front view of the linear motor of Fig. 1. Figure 3 is a top view of a field magnet. 098104165 26 200945737 Figure 4 is a perspective view of the armature. Figure 5 is a cross-sectional view along the direction of movement of the electric cymbal. Figure 6 is a perspective view of the armature in an inverted state. - Figure 7 is a perspective view of the spool. Figure 8 is the frame used for casting. Fig. 9 is a graph showing the relationship between the particle diameter of a metal oxide and the mass percentage. φ Figure 10 is a schematic diagram of an enlarged cross-sectional view of the spool. Figure 11 is a perspective view of a rod type linear motor according to a second embodiment of the present invention. Fig. 12 is a view showing the positional relationship between the magnet and the coil of the linear motor. Fig. 13 is a perspective view showing a coil unit held by a coil holder. Fig. 14 is a detailed view of the coil holder (Fig. (A) shows a front view, and (B) shows a cross-sectional view). Fig. 15 is a view showing the relationship between the current flowing through the coil and the coil temperature (in the figure (A) shows the current value 1x1 times, (B) shows the current value 1x1.15 times, and (C) shows the current value. 1x1·63 times case). [Description of main components] 1 Base la Bottom plate lb Side wall 2 Field magnets 3, 3a, 3b, 3c Coil 098104165 27 200945737 5 6 7 7a 7b 9 11 11a~1lc lid 12 12a 14 14a 14b 16 17 19 21 22 22a 22b 23 Execution block combined with top plate top frame foot armature core comb tooth base plate heat sink groove groove line axis shaft body flange part forming body die plate magnet rod forming body (outer cover) 098104165 28 200945737 24 Coil 24a Wire 25 Coil Holder _ 25a Holder body part. 25b Spacer part 25c Projection 25d Recess 〇 26 Insulating substrate 27 Polar rail 28 Bushing 29 End member 31 Q Magnet 098104165 29