201031088 六、發明說明： 【發明所屬之技術領域】 本發明是關於一種被要求推力紋波或低發熱的一定速 度送進或高精度定位用的無心線型馬達，尤其是關於其電 樞構造者。 【先前技術】 φ 第4圖是表示習知技術的無心線型馬達的側斷面圖， 第5圖是表示第4圖的無心線型馬達的立體圖（例如，參 照專利文獻1)。又，在習知例中使用在構成活動元件的電 樞的兩側配置於成爲定子的勵磁極的磁通貫通式構造的可 動線圈型線型馬達的例子加以說明。 在第4圖中，1是電樞，2a，2b是密封外殼，3是 框，4是基座，5是電樞繞組，6是結線基板，7是模鑄樹 月旨，8是勵磁極，9是勵磁轭，1 0a及1 Ob是永久磁鐵，1 3 φ 是冷媒通路。 勵磁極8是成爲在具有3形狀斷面的勵磁軛9的兩側 面而朝著與紙面垂直方向排列配置複數個永久磁鐵1 〇a及 1 〇b成爲極性交互地不相同者。電樞1是經由永久磁鐵 1 0a，1 Ob的磁鐵列與磁性空隙作成相對配置，而且配置具 有排列捲繞於結線基板6所成的複數線圈列的電樞繞組 5，成爲在線圈列與線圈列之間的間隙部及表面塡充模鑄 樹脂7予以固裝者。又，在藉由模鑄樹脂7與密封外殼 2a，2b及框3所圍繞的部分形成有冷媒通路1 3。 -5- 201031088 在此種構成中，當通電於線型馬達的電樞繞組1，藉 由該電樞1與永久磁鐵10a，10b的磁通的電磁作用，使 得安裝於電樞繞組5的電樞1朝直線方向移動。此時，在 冷媒通路13內部供應冷媒，就可把構成電樞繞組5的線 圈列的表面強制冷卻。 專利文獻1 :日本專利第3832556號公報 【發明內容】 然而，習知的線型馬達是有以下的問題。 (1) 隨著機械裝置的小型化，被要求線型馬達的安裝姿 勢各式化，惟爲了安裝姿勢的多式各樣化，對於任意的安 裝姿勢必須將冷卻用的冷媒經常塡充於冷媒通路內的情 形。習知的線型馬達電樞，是覆蓋位於線圈列的模鑄樹脂 與密封外殼之間的所有間隙爲構成冷媒通路的單純的薄厚 狀空間之故，因而由其流路斷面積的寬度無法拘束冷媒的 流動，例如，在變更馬達的安裝姿勢時會發生冷媒不會流 動（流動淤塞）等的問題，而成爲顯著降低冷卻性能的主要 原因。 (2) 作爲拘束冷媒的流動所用的方策，須增加馬達的零 件件數，惟若增加零件件數，會使熱傳導性變差而會增加 馬達的熱阻力，而有發熱量變大等的問題。 (3) 又，作爲均勻地塡充冷媒通路內的冷媒的方策，增 加供應於冷媒通路內部的冷媒流量等的對策成爲必需，惟 若增加冷媒流量會使得冷媒通路內部的壓力上昇而使得冷 -6- 201031088 媒通路變形，與其他構件有干擾而有破壞冷媒通路本體等 的問題。 本發明是爲了解決上述課題所創作者，提供一種即使 馬達的安裝姿勢有所變化，也可抑制發生位於模鑄樹脂與 密封外殼之間的冷媒通路內的間隙部的冷媒的流動的淤 塞’防止降低冷卻性能，而且可防止冷媒通路的變形的無 心線型馬達電樞及無心線型馬達。 φ 爲了解決上述課題，申請專利範圍第1項所述的發 明’一種無心線型馬達電樞，屬於具備：複數線圏列所構 成的電樞繞組；及設成覆蓋著上述電樞繞組的密封外殻； 及形成於上述電樞繞組與上述密封外殼之間，而能強制冷 卻上述線圈列的表面地流著冷媒的冷媒通路，其特徵爲： 在構成上述電樞繞組的線圈列與線圈列之間的表面及間隙 部，塡充著模鑄樹脂，上述模鑄樹脂是在位於與上述密封 外殼之間的間隙部，形成從該模鑄樹脂之表面朝著該密封 Φ 外殻的內壁突出且成爲朝著冷媒的流動方向局部地縮小流 路斷面積的流路縮小部的突起。 申請專利範圍第2項所述的發明，是在申請專利範圍 第1項所述的無心線型馬達電樞中，上述突起以平面視， 沿著上述電樞繞組的相鄰接的線圈列與線圈列之間或是該 線圏列的鄰接部形成，上述冷媒通路爲平面視，具有沿著 線圈列而長又扁平的流路斷面形狀作爲特徵者。 申請專利範圍第3項所述的發明，是在申請專利範圍 第1項或第2項所述的無心線型馬達電樞中，上述突起是 -7- 201031088 作成與上述模鑄樹脂同一材料，爲其特徵者。 申請專利範圍第4項所述的發明，是在申請專利範圍 第1項或第2項所述的無心線型馬達電樞中，上述突起是 與上述模鑄樹脂一體成形，爲其特徵者。 申請專利範圍第5項所述的發明，是在申請專利範圍 第1項或第2項所述的無心線型馬達電樞中，上述突起是 具備被夾入在與上述密封外殻之間而被保持的橡膠系彈性 體，上述橡膠系彈性體是當負荷施加於上述密封外殼會壓 ❿ 縮變形而將上述突起與上述密封外殼之間的間隙作成氣密 的密封構件，爲其特徵者。 申請專利範圍第6項所述的發明，是一種無心線型馬 達，其特徵爲具備：申請專利範圍第1項至第5項中任一 項所述的電樞；及與上述電樞經由磁性空隙所配置，而且 交互地排列極性不相同的複數永久磁鐵的勵磁磁極，將上 述電樞與上述勵磁磁極的任一方作爲定子，另一方作爲活 動元件而作成相對地行走。 @ 依照申請專利範圍第1項及申請專利範圍第2項所述 的發明，在覆蓋線圈列的模鑄樹脂與密封外殼之間的間隙 部，設置從模鑄樹脂之表面朝著密封外殼的內壁突出且成 爲朝著冷媒的流動方向局部地縮小流路斷面積的流路縮小 部的突起之故’因而在冷媒通路的內部對於冷媒可作出任 意的流路’又，藉由突起的形狀或數量可任意地可控制冷 媒的流動之故’因而成爲可將冷媒經常地塡充於'冷媒通路' 內’且流著一定的冷媒。結果’即使馬達的安裝姿勢有所 -8 - 201031088 變化，也可抑制發生位於模鑄樹脂與密封外殼之間的冷媒 通路內的間隙部的冷媒的流動所致的淤塞，防止降低冷卻 性能，而且可防止冷媒通路的變形。 依照申請專利範圍第3項的發明，將突起的材質作成 與模鑄樹脂同一，就可將熱脹係數可作成同一，對於隨著 溫度上昇的熱變形，而成爲同一熱變形量之故，因而成爲 可將施加於突起部的熱應力抑制成最小，而成爲不容易產 φ 生突起的剝離等，提昇信賴性。 依照申請專利範圍第4項的發明，由於與爲了電樞繞 組的絕緣及固定所進行的模鑄工程之同時可製作突起，因 此成爲可減低工數，改善作業性，刪減工數。又，藉由模 鑄模具經常地以相同位置與尺寸進行配置成爲可能之故， 因而可將冷媒的流動可管理成一定，抑制製品對於熱傳輸 的偏差程度成爲可能，提昇信賴性。 依照申請專利範圍第5項所述的發明，未直接接觸突 φ 起與密封外殼，作成經由橡膠系彈性體的構成，以彈性體 可避免藉由突起高度的尺寸的偏差程度所發生的對於密封 外殻的接觸應力之故，因而抑制密封外殼的變形量成爲可 能，可抑制密封外殼的破壞或變形所致的與其他零件的干 擾之故，因而提昇信賴性。 依照申請專利範圍第6項所述的發明，即使可動線圈 型或可動磁鐵型的任一馬達形態，也可提供一種可安裝於 任意方向的無心線型馬達。 201031088 【實施方式】 以下，針對於本發明的實施形態參照圖式加以說明。 [實施例1] 第1圖是表示本發明的實施例的線型馬達電樞的側斷 面圖，第2圖是表示覆蓋第1圖的線型馬達電樞的線圈列 的表面的模鑄樹脂與突起的配置關係的立體圖’第1圖及 第2圖都省略勵磁極的圖示。第3圖是在朝平面方向偏離 Q 9 0°第2圖的線型馬達電樞的狀態（第2圖的箭號視A方向） 下，擴大突起與密封外殼之間配置彈性體的部分的側斷面 圖。 在圖中，11a及lib是設於模鑄樹脂的突起，12是密 封構件。 在本實施例中，使用在構成活動元件的電樞的兩側配 置成爲定子的勵磁極的磁通貫通型構造的可動線圈型無心 線型馬達的例子加以說明，冷卻電樞之故’因而以框3及 U 密封外殻2a，2b構成冷媒通路1 3。針對於本發明的構成 要素與習知技術相同之處，省略其說明。而僅說明不相同 之處。 本發明與習知技術不相同之處是如以下所說明。 亦即，在構成電樞繞組5的線圈列與線圈列之間的表 面及間隙部，塡充模鑄樹脂7，模鑄樹脂7是在位於與密 封外殻2a，2b之間的間隙部形成從該模鑄樹脂7的表面 朝著該密封外殼2a，2b的內壁突出且朝著冷媒通路13的 -10- 201031088 冷媒的流動方向成爲局部地縮小流路斷面積的流路縮小部 的突起lla及lib之處。 又，突起1 1 a及1 1 b以平面視沿著電樞繞組5的相鄰 接的線圈列與線圈列之間或是該線圈列的鄰接部所形成， 冷媒通路1 3以平面視成爲具有沿著線圈列長及扁平的流 路斷面形狀者，所謂突起1 1 a及1 1 b對於冷媒流路配置成 爲迷宮。 φ 又，突起lla及11b是作成與模鑄樹脂同一材料，或 是構成與模鑄樹脂作成一體成形也可以。 又，突起1 la及1 lb是具備被夾入在密封外殼2a，2b 之間而被保持橡膠系彈性體，橡膠系彈性體是作爲當負荷 施加於密封外殼2 a，2 b會壓縮變形而氣密突起1 1 a及1 I b 與密封外殼2a，2b之間的間隙的密封構件1 2者。 本發明的實施例是如第1圖及第2圖所示地，在模鑄 樹脂7配置突起，代替在習知很難控制流路的冷媒通路成 # 爲可控制流路的構造，而對於馬達的任意安裝姿勢，安裝 馬達成爲可能。 又，突起1 1 a及1 1 b是作成與模鑄樹脂同一材料且一 體成形，可緩和依熱所致的突起的變形或應力，而提昇信 賴性，又高精度地再現定位，抑制熱阻力的參差不齊之 故’因而提昇信賴性。 又，未直接接觸突起lla及lib與密封外殼2a，2b， 作成經由彈性體之構成，以彈性體可避免藉由突起1 1 a及 Π b的高度尺寸的參差程度所發生的對於密封外殼的接觸 201031088 應力之故，因而抑制密封外殻2 a，2b的變形量成爲可 能，而可抑制密封外殼2a，2b的破壞或變形所致的與其 他零件的干擾之故，因而提昇信賴性。 又，在本實施例中使用將成爲定子的勵磁極配置於成 活動元件的電樞兩側的磁通貫通型構造的線型馬達的例子 加以說明，惟代替成將活動元件作爲勵磁極，又將電樞作 爲定子配置於定子的單側的間隙對向構造，或是構成也可 以。 如以上所述地，可提供對於任意的安裝姿勢可安裝的 線型馬達之故，因而可適用於裝置的小型化作爲必需的工 作母機，半導體製造裝置，液晶檢查裝置等。 【圖式簡單說明】 第1圖是表示本發明的實施例的線型馬達電樞的側斷 面圖。 第2圖是表示覆蓋第1圖的線型馬達電樞的線圈列的 表面的模鑄樹脂與突起的配置關係的立體圖。 第3圖是在朝平面方向偏離90°第2圖的線型馬達電 樞的狀態（第2圖的箭號視A方向）下，擴大突起與密封外 殻之間配置彈性體的部分的側斷面圖。 第4圖是表示習知技術的無心線型馬達的側斷面圖。 第5圖是表示第4圖的無心線型馬達的立體圖。 【主要元件符號說明】 -12- 201031088 1 :電樞 2a，2b :密封外殼 3 :框 4 :基座 5 :電樞繞組 6 :結線基板 7 :模鑄樹脂 0 8 :勵磁極 9 :轭 10a，1 Ob :永久磁鐵 1 1 a，1 1 b :突起 12 :彈性體（密封構件） 1 3 :冷媒通路BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless type motor for a certain speed feed or high-precision positioning requiring thrust ripple or low heat generation, particularly regarding its armature constructor. [Prior Art] Fig. 4 is a side sectional view showing a coreless motor of the prior art, and Fig. 5 is a perspective view showing the coreless motor of Fig. 4 (for example, refer to Patent Document 1). Further, in the conventional example, an example of a movable coil type linear motor in which a magnetic flux penetrating structure that is a field pole of a stator is disposed on both sides of an armature that constitutes a movable element will be described. In Fig. 4, 1 is the armature, 2a, 2b are the sealed casing, 3 is the frame, 4 is the base, 5 is the armature winding, 6 is the junction board, 7 is the die-casting tree, 8 is the excitation pole , 9 is the excitation yoke, 10a and 1 Ob are permanent magnets, and 1 3 φ is the refrigerant passage. The field poles 8 are arranged on both sides of the field yoke 9 having a three-shaped cross section, and a plurality of permanent magnets 1a and 1b are arranged alternately in the direction perpendicular to the paper surface. The armature 1 is disposed so as to face the magnetic gap via the magnet array of the permanent magnets 10a, 1Bb, and has the armature winding 5 arranged in a plurality of coil rows formed by the winding board 6 so as to be in the coil row and the coil. The gap portion and the surface between the columns are filled with the mold resin 7 to be fixed. Further, a refrigerant passage 13 is formed in a portion surrounded by the molding resin 7 and the sealed casings 2a, 2b and the frame 3. -5- 201031088 In this configuration, when the armature winding 1 is energized to the linear motor, the armature of the armature winding 5 is electromagnetically acted upon by the magnetic flux of the armature 1 and the permanent magnets 10a, 10b 1 Move in a straight line. At this time, by supplying the refrigerant inside the refrigerant passage 13, the surface of the coil row constituting the armature winding 5 can be forcibly cooled. Patent Document 1: Japanese Patent No. 3832556 SUMMARY OF THE INVENTION However, the conventional linear motor has the following problems. (1) With the miniaturization of the mechanical device, the mounting posture of the linear motor is required to be various. However, in order to achieve various types of mounting postures, the cooling refrigerant must be constantly filled in the refrigerant passage for any mounting posture. The situation inside. The conventional linear motor armature is such that all the gaps between the molding resin and the sealed casing covering the coil row are simple thin and thick spaces constituting the refrigerant passage, and thus the width of the flow passage sectional area cannot be restrained by the refrigerant. For example, when the motor is mounted in a posture, the refrigerant does not flow (flow and blockage), and the like, and the cooling performance is remarkably lowered. (2) As a method for restricting the flow of the refrigerant, the number of parts of the motor must be increased. However, if the number of parts is increased, the thermal conductivity is deteriorated, and the thermal resistance of the motor is increased, and the amount of heat generation is increased. (3) In addition, as a means of uniformly charging the refrigerant in the refrigerant passage, it is necessary to increase the flow rate of the refrigerant supplied to the inside of the refrigerant passage. However, if the flow rate of the refrigerant is increased, the pressure inside the refrigerant passage is increased to make it cold- 6- 201031088 The media path is deformed, which interferes with other components and has the problem of destroying the refrigerant path body. In order to solve the above-mentioned problems, the present invention provides a method of preventing the flow of the refrigerant in the gap portion in the refrigerant passage between the molding resin and the sealed casing, even if the mounting posture of the motor is changed. A coreless motor armature and a coreless motor that reduce cooling performance and prevent deformation of the refrigerant passage. φ In order to solve the above problems, the invention described in claim 1 is a non-heart-type motor armature, which is an armature winding including: a plurality of wire arrays; and a seal that covers the armature windings And a refrigerant passage formed between the armature winding and the sealed casing to forcibly cool a surface of the coil row and flowing a refrigerant, wherein: a coil row and a coil row constituting the armature winding The surface and the gap portion are filled with a molding resin, and the molding resin is formed in a gap portion between the sealing case and the sealing member, and is formed to protrude from the surface of the molding resin toward the inner wall of the sealing member. Further, it is a projection that narrows the flow path reducing portion of the flow path sectional area in the flow direction of the refrigerant. The invention of claim 2, wherein the protrusion is in a plan view, along the adjacent coil row and coil of the armature winding, in the coreless motor armature according to claim 1. The adjacent portions of the rows or the line are formed, and the refrigerant passage is a plan view, and has a shape of a cross section of a flow path which is long and flat along the coil row. The invention according to claim 3, wherein the protrusion is -7-201031088 and is made of the same material as the above-mentioned molding resin, in the coreless motor armature according to the first or second aspect of the patent application. Its characteristics. The invention of claim 4, wherein the projection is integrally formed with the molding resin, and is characterized in that the projection is in a coreless motor armature according to the first or second aspect of the invention. The invention according to claim 5, wherein the protrusion is provided between the sealed case and the sealed case. In the rubber-based elastic body to be held, the rubber-based elastic body is a sealing member in which a load is applied to the sealed outer casing to be compressed and contracted, and a gap between the projection and the sealed outer casing is made airtight. The invention described in claim 6 is a coreless motor, characterized by comprising: the armature according to any one of claims 1 to 5; and the armature via the magnetic gap The field poles of the plurality of permanent magnets having different polarities are arranged alternately, and one of the armature and the field pole is used as a stator, and the other side is moved as a movable element. @ According to the invention of claim 1 and the invention of claim 2, the gap between the molding resin covering the coil row and the sealed casing is provided from the surface of the molding resin toward the inside of the sealed casing. The wall protrudes and becomes a protrusion of the flow path narrowing portion that partially narrows the flow path sectional area toward the flow direction of the refrigerant. Therefore, an arbitrary flow path can be made for the refrigerant inside the refrigerant passage, and by the shape of the protrusion or The amount can be arbitrarily controlled by the flow of the refrigerant. Thus, the refrigerant can be constantly filled in the 'refrigerant passage' and a certain amount of refrigerant flows. As a result, even if the mounting posture of the motor is changed from -8 to 201031088, it is possible to suppress the occurrence of fouling due to the flow of the refrigerant in the gap portion in the refrigerant passage between the molded resin and the sealed casing, and to prevent the cooling performance from being lowered, and It can prevent deformation of the refrigerant passage. According to the invention of claim 3, the material of the protrusion is made the same as that of the molding resin, so that the coefficient of thermal expansion can be made the same, and the thermal deformation due to the temperature rise becomes the same amount of thermal deformation. The thermal stress applied to the protrusions can be suppressed to a minimum, and peeling of the protrusions which are not easily produced can be suppressed, and the reliability can be improved. According to the invention of the fourth aspect of the patent application, since the projections can be produced at the same time as the molding process for the insulation and fixing of the armature winding, the number of operations can be reduced, the workability can be improved, and the number of work can be reduced. Further, it is possible to arrange the mold at the same position and size frequently, so that the flow of the refrigerant can be managed to a certain extent, and it is possible to suppress the degree of deviation of the product from heat transfer, thereby improving the reliability. According to the invention of claim 5, the sealing member is not directly contacted with the sealing case, and is formed by the rubber-based elastic body, so that the elastic body can avoid the sealing caused by the degree of deviation of the height of the protrusion height. The contact stress of the outer casing makes it possible to suppress the amount of deformation of the sealed outer casing, and it is possible to suppress interference with other parts due to breakage or deformation of the sealed outer casing, thereby improving reliability. According to the invention of claim 6, the centerless type motor which can be attached to any direction can be provided even in any of the movable coil type or the movable magnet type. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Embodiment 1] Fig. 1 is a side sectional view showing a linear motor armature according to an embodiment of the present invention, and Fig. 2 is a view showing a molding resin covering a surface of a coil row of the linear motor armature of Fig. 1 The perspective view of the arrangement relationship of the protrusions is the illustration of the excitation poles in both the first and second figures. Fig. 3 is a side view of the portion where the elastic body is disposed between the enlarged projection and the sealed casing in a state in which the linear motor armature of the second figure is shifted in the plane direction (the arrow of Fig. 2 is viewed in the direction A). Sectional view. In the figure, 11a and lib are projections provided on the molded resin, and 12 is a sealing member. In the present embodiment, an example of a movable coil type non-heart-wire type motor in which a magnetic flux-through type structure that is a field pole of a stator is disposed on both sides of an armature that constitutes a movable element will be described, and the armature is cooled. 3 and the U sealed casings 2a, 2b constitute a refrigerant passage 13 . The constituent elements of the present invention are the same as those of the prior art, and the description thereof will be omitted. It only explains the differences. The present invention is different from the prior art as described below. That is, the surface of the coil row and the coil row constituting the armature winding 5 and the gap portion are filled with the mold resin 7, and the mold resin 7 is formed at a gap portion between the seal case 2a, 2b. The flow from the surface of the molding resin 7 toward the inner walls of the sealed casings 2a, 2b and toward the refrigerant passage 13 - 201031088, the flow direction of the refrigerant becomes a projection of the flow path reduction portion which partially narrows the flow path sectional area. Lla and lib. Further, the protrusions 1 1 a and 1 1 b are formed in plan view along the adjacent coil row of the armature winding 5 and the coil row or the adjacent portion of the coil row, and the refrigerant passage 13 is formed in a planar view. The protrusions 1 1 a and 1 1 b are arranged in a labyrinth for the refrigerant flow path, and have a flow path cross-sectional shape that is long along the coil row and flat. φ Further, the projections 11a and 11b may be formed of the same material as the molding resin, or may be formed integrally with the molding resin. Further, the projections 1 la and 1 lb are provided with a rubber-based elastic body sandwiched between the sealed outer casings 2a and 2b, and the rubber-based elastic body is compressed and deformed as a load applied to the sealed outer casing 2a, 2b. The airtight projections 1 1 a and 1 I b are sealed to the sealing member 1 2 which seals the gap between the outer casings 2a, 2b. In the embodiment of the present invention, as shown in Figs. 1 and 2, projections are placed on the molding resin 7, and instead of the structure in which the refrigerant passage which is difficult to control the flow path is controlled to be a controllable flow path, It is possible to install the motor in any mounting position of the motor. Further, the projections 1 1 a and 1 1 b are formed integrally with the same material as the molding resin, and can alleviate deformation or stress of the projections due to heat, thereby improving reliability, reproducing the positioning with high precision, and suppressing thermal resistance. The unevenness of the 'thus enhances trust. Further, the projections 11a and 11b and the sealed outer casings 2a, 2b are not directly contacted, and the elastic body is formed so that the elastic body can avoid the unevenness of the height dimension of the projections 1 1 a and Π b for the sealed casing. Contact with 201031088 stress, thereby suppressing the amount of deformation of the sealed outer casings 2a, 2b, and suppressing interference with other parts due to breakage or deformation of the sealed outer casings 2a, 2b, thereby improving reliability. Further, in the present embodiment, an example in which a field-type motor having a magnetic flux-through type structure in which the field poles of the stator are disposed on both sides of the armature of the movable element will be described, but instead of using the movable element as the exciting pole, The armature may be disposed as a stator on a one-side gap opposing structure of the stator, or may be configured. As described above, it is possible to provide a linear motor that can be mounted in an arbitrary mounting posture, and thus it is applicable to the miniaturization of the apparatus as a necessary working machine, a semiconductor manufacturing apparatus, a liquid crystal inspection apparatus, and the like. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side sectional view showing a linear motor armature of an embodiment of the present invention. Fig. 2 is a perspective view showing an arrangement relationship between a molding resin and a projection covering the surface of the stitch row of the linear motor armature of Fig. 1. Fig. 3 is a side view of the portion where the elastic body is disposed between the enlarged projection and the sealed casing in a state in which the linear motor armature of Fig. 2 is deviated in the plane direction (the arrow in Fig. 2 is viewed in the A direction). Surface map. Fig. 4 is a side sectional view showing a prior art coreless motor. Fig. 5 is a perspective view showing the coreless motor of Fig. 4. [Description of main component symbols] -12- 201031088 1 : Armature 2a, 2b: Sealed case 3: Frame 4: Base 5: Armature winding 6: Wire-bonding substrate 7: Molded resin 0 8 : Excitation pole 9 : Yoke 10a , 1 Ob : permanent magnet 1 1 a, 1 1 b : protrusion 12 : elastomer (sealing member) 1 3 : refrigerant passage