200947831 九、發明說明： 【發明所屬之技術領域】 本發明是關於一種馬達，尤指一種應用於線型壓縮機 或泵浦領域，可藉由軟磁複合材料製造馬達定子之發明設 計0BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly to an invention design for manufacturing a motor stator by a soft magnetic composite material, which is applied to a line compressor or a pumping field.
【先前技術】 自永磁無刷馬達問世之後，其高效率及高功率密度特 點，已逐漸普遍應用於各式場合中，而取代傳統有刷馬達 或感應馬達，例如變頻壓縮機、電動車輛、船舶推進等應 ❹ 用場合，由於永磁無刷馬達利用電子換相取代傳統有刷馬 達的碳刷結構，具有高效率、可操控性佳及維修容易等優 點，加上近年來稀土類磁鐵技術提昇與成本下降，使得永 磁無刷馬達能夠往高效率及高功率密度方向發展，尤其在 冷凍系統中，為了達到節能目的並獲得更佳的冷凍系統效 能’變頻冰箱已成未來市場主流，其主要關鍵技術為變頻 壓縮機，且其發展趨勢是以提高壓縮機整效率為目標。 在小噸數的動力機具之壓縮機種類上，主要分1迴轉 式壓縮機、渦卷式壓縮機與往復式壓縮機，其應用於小型 冰箱I缩機上’主要有迴轉式㈣機與往復⑭縮機’，、迴 轉式壓縮機在運作上nmw轉式馬達帶動迴 轉活塞，使迴轉活塞作偏心運動及壓縮汽红内氣 到所需求之壓力，此型壓縮機之缺點，主要是因為偏心運 轉而導致振動與噪音。 4 200947831 而傳統往復式壓縮機，則是利用旋轉式馬達帶動曲柄 連桿，並、輯桿機構推動活塞，使汽W氣㈣縮，進而 得到所需要的壓力’此-往復式壓縮機雖具有成本低及運 作範圍廣等優點’然而，活塞壓縮的過程會造成—側向力， ❹ 造成汽缸壁磨m間接導致料、振動及高機械損失等 問題，以往-般家庭中，冰箱放置於廚房，其振動與嚼音 並不會對居家生活造成太大影響，但隨著可用空間越來越 小，導致壓縮機產生之振動與噪音對於人的影響逐漸增 大’故目前市售冰箱皆標榜靜音化設計來降低噪音，為此， 在馬達設計上，即採用線型馬達，利用線型馬達具有高效 率、高響應性能，&無側向力之顧慮，故其應用於小型冰 箱壓縮機中，能更具市場競爭優勢。 然而，上述傳統動力機具之的功率輸出端的動子質 量’會影響壓縮機的操作頻率，以及馬達規格受限於壓縮 機整體體積，間接影響面積大小與繞線匝數多募，且高溫 以及散熱不易的工作環境導致電流密度有所限制，如依照 壓縮過程推算，線型馬達需較高的安培匝數以產生較大的 輸出推力來滿足負載需求，故於電流密度有所限制下，必 需提高槽面積來增加繞線匝數，才能進一步提升推力密 度，又，傳統動力機具之馬達定子，是由矽鋼片堆疊而成， 其主齒部形成矩形狀，其外部繞設線圈及轉折無法縮短有 效軸長，故其銅線用量較多、鋼損高，而無法提升其整體 效率。 200947831 【發明内容】 .本發明目的是提供一種「馬達」，其係利用軟磁複合 材料（SMC)以粉末冶金技術製造，而能解決傳統動力機 具爻限於整體體積，導致馬達推力亦受限制等問題，其藉 由上述材料所製成的馬達定子，可有效提高槽面積，而能 允許較多的繞線匝數，使其在有限體積下，能使馬達產生 更商的推力在、度，此為本發明設計之主要目的。 為達成上述目的之結構特徵及技術内容，本發明提供 一種「馬達」，其係由軟磁複合材料（s〇ft Magnetic Composites，SMC)以粉末冶金技術所製造而成，該馬達 具有一定子及一動子，定子具有一圓形的本體，本體中形 成穿孔，以及本體中成型出數個等間距排列的框架，框架 上形成一弧板，且於弧板内壁面成型出數個等間距排列的 齒部，齒部與框架之間形成繞線槽部’於齒部上繞設線圈。 藉此設計，而能改變馬達的繞組結構，使其可繞設線 〇圈的槽面積提高約30〜4〇%，而能增加繞線阻數，使其可在 有效電流密度的前提下’能提供較大的安培阻數，進而提 高馬達單位體積下之推力。 【實施方式】 配合參看第一圖至第四圖所示，其中，本發明「馬達」， 其係利用軟磁複合材料（Sof t Magnetic c〇mp〇sites，smc ) 以粉末冶金技術所製造而成’其適用於作為動力機具之線 型壓縮機、泵浦（Pump)的動力馬達，該馬達具有—定子 6 200947831 (1)及-動子（2) ’定子（1)具 ^(10)中形成穿孔（11)，以及本體（工 中成里出數個等間距排列的框架（12)，框架㈠ 2)上形成-弧板（13)，且於弧板（13 型出數個等間距排列的齒部（“），齒部（“）= 架（1 2 )之間形成繞線槽部（丄5 )，於齒部、 上繞設線圈（1 7 )。 )[Prior Art] Since the advent of the permanent magnet brushless motor, its high efficiency and high power density characteristics have gradually been widely used in various occasions, replacing the traditional brush motor or induction motor, such as inverter compressors, electric vehicles, In the case of ship propulsion, etc., the permanent magnet brushless motor replaces the carbon brush structure of the conventional brush motor with electronic commutation, which has the advantages of high efficiency, good maneuverability and easy maintenance, plus the rare earth magnet technology in recent years. Increased and cost-reduced, permanent magnet brushless motors can be developed in the direction of high efficiency and high power density, especially in refrigeration systems, in order to achieve energy-saving purposes and obtain better refrigeration system performance. The main key technology is the inverter compressor, and its development trend is to improve the overall efficiency of the compressor. In the compressor type of small tonnage power equipment, it is mainly divided into 1 rotary compressor, scroll compressor and reciprocating compressor, which is applied to small refrigerator I reducer' mainly rotary type (four) machine and reciprocating 14 shrinking machine', the rotary compressor is operated. The nmw rotary motor drives the rotary piston to make the rotary piston eccentrically move and compress the steam red internal gas to the required pressure. The shortcoming of this type of compressor is mainly due to eccentricity. Operation causes vibration and noise. 4 200947831 The traditional reciprocating compressor uses a rotary motor to drive the crank connecting rod, and the rod mechanism pushes the piston to shrink the steam W gas (four), thereby obtaining the required pressure. This reciprocating compressor has Low cost and wide operating range. However, the piston compression process will cause side forces, ❹ causing problems such as material, vibration and high mechanical loss caused by the cylinder wall grinding. In the past, the refrigerator was placed in the kitchen. The vibration and chewing sound will not have much impact on the home life, but as the available space becomes smaller and smaller, the vibration and noise generated by the compressor will gradually increase the impact on people. Quiet design to reduce noise, for this reason, in the motor design, that is, the use of linear motor, the use of linear motor with high efficiency, high response performance, & no side force concerns, it is used in small refrigerator compressors, Can be more competitive in the market. However, the mass of the power output of the above-mentioned conventional power tool will affect the operating frequency of the compressor, and the motor size is limited by the overall volume of the compressor, indirectly affecting the area size and the number of winding turns, and the high temperature and heat dissipation. The difficult working environment leads to a limitation of the current density. For example, according to the compression process, the linear motor needs a higher ampere-turn to generate a larger output thrust to meet the load demand. Therefore, it is necessary to increase the slot under the limitation of the current density. The area is increased by the number of winding turns to further increase the thrust density. Moreover, the motor stator of the conventional power tool is formed by stacking silicon steel sheets, and the main tooth portion is formed in a rectangular shape, and the external winding of the coil and the turning cannot shorten the effective axis. Long, so the copper wire is used more, the steel loss is high, and the overall efficiency cannot be improved. 200947831 SUMMARY OF THE INVENTION The object of the present invention is to provide a "motor" which is manufactured by powder metallurgy using a soft magnetic composite material (SMC), and can solve the problems that the conventional power tool is limited to the overall volume, and the motor thrust is also limited. The motor stator made of the above materials can effectively increase the groove area, and can allow more winding turns, so that the motor can generate a more favorable thrust force in a limited volume. The main purpose of the design of the present invention. In order to achieve the structural features and technical contents of the above object, the present invention provides a "motor" which is manufactured by powder metallurgy technology from soft magnetic composites (SMC), which has certain and one motion. The stator has a circular body, a through hole is formed in the body, and a plurality of equally spaced frames are formed in the body, an arc plate is formed on the frame, and a plurality of equally spaced teeth are formed on the inner wall surface of the arc plate. a portion, a winding groove portion is formed between the tooth portion and the frame, and a coil is wound around the tooth portion. By this design, the winding structure of the motor can be changed, so that the groove area around the coil can be increased by about 30 to 4%, and the winding resistance can be increased to make it possible under the premise of effective current density. It can provide a large ampere resistance, which in turn increases the thrust per unit volume of the motor. [Embodiment] Referring to the first to fourth figures, the "motor" of the present invention is manufactured by powder metallurgy using a soft magnetic composite material (Sof t Magnetic c〇mp〇sites, smc). 'It is applicable to a linear compressor and a pump power motor as a power tool. The motor has a stator 6 200947831 (1) and a mover (2) 'the stator (1) is formed in the ^ (10) The perforation (11), and the body (the frame (12) arranged in equal intervals, the frame (1) 2) are formed on the arc plate (13), and the arc plates (the type 13 are arranged at equal intervals) The tooth portion ("), the tooth portion (") = the frame (1 2 ) forms a winding groove portion (丄5), and the coil portion (1 7 ) is wound around the tooth portion.
所述之本體（10)中成型出數道環槽（16)，環 槽（1 6 )位於框架（丄2 )與齒部（丄4 )之間。 上述本體（1 0 )穿孔（i丄）可供動子（2)穿設 其中，且於動子（2)表面設置二永久磁鐵（2〇)環圈， 配合參看第七圖所示，該永久磁鐵（2Q)與線圈（工7) 通入電流之相互作肖’能使動子（2 )側向移動而輸出推 力。 上述馬達的繞組結構，使繞線槽部（i 5 )可繞設線 φ圈的槽面積與傳統型相比約提高30〜40%，故能增加繞線匝 數，使其在有效電流密度下，能提供較大的安培匝數，因 此’可達到提高馬達單位體積下之推力。 本發明所採用的軟磁複合材料（SMC )的材質特性， 是由粉末顆粒般的鐵所製成，顆粒與顆粒之間附有非導磁 性的黏著劑（Binder)，即利用合成樹脂（Resin)作為 每個顆粒的塗層，其製造流程是利用粉末冶金技術 (Metallurgy)將鐵粉顆粒與塗層壓製，再經由熱處理 (Heat Treatment)後即完成，由於熱處理之程序不同， 7 200947831 可改變其機械強度，而在壓製過程中，壓力可達800MPa， 為了避免在熱處理時兩溫及高廢產生使黏著劑軟化，導致 顆粒結合成塊狀鐵，故溫度須控制在15〇〜5〇〇度之間，又 因=顆粒與顆粒間存在非導磁性材料，在磁通路徑上即視 為微小氣隙，故相對於矽鋼片之7000至1〇000的相對導 磁率（Relative permeability)，SMC材料的導磁率較低， 其相對導磁率約為500至7〇〇。 上述SMC材料之優點，於製程上具有高材料使用率， M 控㈣肖使用4等優，點’相冑於珍鋼片沖壓後 會留下廢棄的材料’胤材料可充分發揮環保的概念且達 到低成本訴求。 而 SMC材料可透過汕磁路結構之齒部圓弧結構設計 能利用圓弧齒部減少邊緣繞組（End_Winding)的漏感現 象，配合參看第五圖及第六圖所示，其中，本發明「馬達」， ;板（1 3 )至本體（工〇 )表面之間所成型出來的齒 _部（1 4 )斷面形成圓弧形狀，其外部繞設線圈（丄7 )， 於相同的繞線面積下可縮短有效轴長，而能大幅降低銅線 用量，且減少銅損並提升效率。 又，SMC材料顆粒間互相絕緣以及圓弧形齒部（1 ) =殊設計’可防止銅絕緣漆刮落，而在馬達製程上不需 率二外加入絕緣之成本’使槽面積相對提升，可降低佔槽 * ( l〇t-FUl Fact〇r)以節省製程時間。A plurality of annular grooves (16) are formed in the body (10), and the annular groove (16) is located between the frame (丄2) and the tooth portion (丄4). The body (10) is perforated (i) for the mover (2) to be disposed therein, and two permanent magnet (2〇) rings are disposed on the surface of the mover (2), as shown in the seventh figure, The permanent magnet (2Q) and the coil (Work 7) interact with each other to make the mover (2) move laterally and output thrust. The winding structure of the motor can increase the groove area of the winding groove portion (i 5 ) around the line φ by about 30 to 40% compared with the conventional type, so that the number of winding turns can be increased to make it at an effective current density. Underneath, it can provide a larger number of ampere turns, so 'can increase the thrust per unit volume of the motor. The material properties of the soft magnetic composite material (SMC) used in the present invention are made of powder-like iron, and a non-magnetic adhesive (Binder) is attached between the particles and the particles, that is, synthetic resin (Resin) is used. As a coating for each particle, the manufacturing process is to use the powder metallurgy technology (Metallurgy) to press the iron powder particles and the coating, and then complete the heat treatment (Heat Treatment). Due to the different heat treatment procedures, 7 200947831 can change its Mechanical strength, and in the pressing process, the pressure can reach 800MPa. In order to avoid the softening of the adhesive during the heat treatment, the adhesive is softened, and the particles are combined into a block of iron. Therefore, the temperature must be controlled at 15〇~5〇〇. Between the two, there is a non-magnetic material between the particles and the particles, which is regarded as a small air gap in the magnetic flux path, so the relative permeability (Selastic permeability) of the 7000 to 1 000 relative to the silicon steel sheet, SMC material The magnetic permeability is low, and its relative magnetic permeability is about 500 to 7 〇〇. The advantages of the above SMC materials have high material utilization rate in the process, and the M control (four) Xiao uses 4 and so on. The point 'will be left behind after the stamping of the Zhengang sheet will leave the waste material'. The material can fully utilize the concept of environmental protection. Achieve low cost appeals. The SMC material can be designed to reduce the leakage inductance of the edge winding (End_Winding) by using the arc tooth portion through the arc-shaped arc structure of the 汕 magnetic circuit structure, as shown in the fifth and sixth figures, wherein the present invention The section of the tooth _ (1 4 ) formed between the plate (1 3 ) and the surface of the body (the workpiece) forms an arc shape, and the coil is wound around the outside (丄7), and the same winding The effective axial length can be shortened under the wire area, which can greatly reduce the amount of copper wire, reduce copper loss and improve efficiency. In addition, the SMC material particles are insulated from each other and the arc-shaped tooth portion (1)=special design' can prevent the copper insulating paint from scraping off, and the cost of the insulation is not required to be added to the motor process, so that the groove area is relatively increased. The slot* ( l〇t-FUl Fact〇r) can be reduced to save process time.
撕村料顆粒間互相絕緣，使磁通所產生之渦流受限 於各顆粒中’因此’其渦流損（Eddyc町entLGssB 8 200947831 低，故於SMC材料應用於馬達設計上，一般都能忽略其渦 流損之影響。 各元件都經由粉末冶金技術製造而成，透過此技術可 將各元件回收’重新壓為粉末再利用，而能充分發揮環保 再生利用功效。 又，馬達相關輸出特性可分為磁交鏈（FluxLinkage) ' 反電動勢常數（Back-EMF Constant)以及輸出推力（〇utThe rips generated by the magnetic flux are insulated from each other, so that the eddy current generated by the magnetic flux is limited by the eddy current loss of each particle (Eddyc-cho entLGssB 8 200947831 is low, so the SMC material is generally applied to the motor design, and the eddy current is generally ignored. The effects of damage. Each component is manufactured by powder metallurgy technology. Through this technology, each component can be recycled and re-pressed into powder for reuse, which can fully utilize the environmentally-friendly recycling effect. Moreover, the motor-related output characteristics can be divided into magnetic FluxLinkage 'Back-EMF Constant and output thrust (〇ut
Force )等，其為馬達設計完成後的重要性能依據，其中， ❹輸出推力主要分為頓轉力（Cogging Force )及勞倫茲力 (Lorentz Force)。 本發明配合動子及其他組件所構成的馬達之負載最大 推力需求為94.32N且衝程需3mm，利用等效磁路分析法以 及氣隙磁導分佈估算法，以定量方式將馬達各項尺寸參數 帶入公式，使之滿足負載需求中的所需衝程範圍與目標最 大推力，而在可運作範圍的最大推力為130N，符合動力機 〇具之線型壓縮機或泵浦所使用的馬達負載之最大推力需 求以及馬達若欲滿足此負載需求中的所需衝程範圍與目 標最大推力，需激磁460安培匝數。 ^而由於線圈電流與繞組匝數為相依關係，故在參數決 疋上需同時考慮，其中影響電流與匝數的因素，包括負載 求電流密度與銅線規格、佔槽率’而本發明以g 求作為限制樣从 取為 fJ條件，首先計算滿足此負載需求的安培 及選擇適告沾 曰的電流密度，經由已知的電流’推算出所堂錮 線規格以；5綞& 螂而銅 綠線匝數，最後再以佔槽率來驗證馬達表 & 9 200947831 計0 上述選擇電流密度為5A/mm2，總合額定電流與電流密 度，可計算出所需銅線面積，藉此選擇鋼線規格，其中， 額定電流為2.5A，銅線面積等於2 5/5 = 〇 5(随2)，藉由查 表選擇銅線規格為AWG21，其截面積為〇 5〇imm2,其外徑Force), etc., is an important performance basis after the motor design is completed. Among them, the output thrust is mainly divided into Cogging Force and Lorentz Force. The maximum thrust requirement of the motor composed of the mover and other components is 94.32N and the stroke is 3mm. The equivalent magnetic circuit analysis method and the air gap magnetic permeability distribution estimation method are used to quantitatively adjust the size parameters of the motor. Bring the formula into the required stroke range and the target maximum thrust in the load demand, and the maximum thrust in the operable range is 130N, which is the maximum thrust of the motor load used in the line compressor or pump of the power cooker. If the demand and the motor are to meet the required stroke range and the target maximum thrust in this load demand, an excitation of 460 amps is required. ^ Since the coil current is dependent on the number of winding turns, it is necessary to consider both the parameters and the factors affecting the current and the number of turns, including the load current density and the copper wire size, and the slot ratio. g is taken as the limit sample from the fJ condition. First, calculate the ampere of the load demand and select the current density of the smear, and calculate the specification of the ridge line through the known current '5缍& 铜 and patina The number of turns in the line, and finally verify the motor table by the slot rate. 9 200947831 0 The above selected current density is 5A/mm2, the total rated current and current density, the required copper area can be calculated, thereby selecting steel Line specification, where the rated current is 2.5A, the copper wire area is equal to 2 5/5 = 〇5 (with 2), and the copper wire specification is AWG21 by the look-up table, the cross-sectional area is 〇5〇imm2, and its outer diameter
為。_ 799mm ’而由負載需求中’若欲滿足此負載需求中所 需的最大推力’需激磁安培E數（Ainpere_Turns)， 藉由額定電流即可推算出匝數Nc為： I Nc=2. 5 Nc=460 Nc=184 (Turns) 又，佔槽率kcp即繞組銅線嵌入繞線槽部（i 5 )之 後，其所佔面積與繞線槽部（15)面積之比率，而由於 =發明以軟磁複合材料（雛）製造定子，使^子整體絕 、’，相對不需絕緣物質來防止導線與SMC材料之間產生短 路，在佔槽率也可使用齡古沾会也 a +也了使用較同的參數，佔槽率越高、效率越 不/、可增加繞線匝數，還能增加審_ A _ A d , 疋此s加導體面積來降低電流 又吏銅損降低，佔槽率的計算方式如下： ^cp=NcAffc/As :申Affc為導線面積，As為繞線槽部（ι 马繞線匝數。 Λ INc 導線面積為for. _ 799mm 'and the maximum thrust required to meet this load demand in the load demand 'Ainpere_Turns', the number of turns Nc is calculated by the rated current: I Nc=2. 5 Nc=460 Nc=184 (Turns) Further, the slot ratio kcp is the ratio of the area occupied by the winding copper wire to the winding groove portion (i 5 ) and the area of the winding groove portion (15), The stator is made of soft magnetic composite material (small), so that the whole piece is absolutely, ', relatively no insulating material is needed to prevent short circuit between the wire and the SMC material, and the groove rate can also be used. Using the same parameters, the higher the slot rate, the less efficient the /, can increase the number of winding turns, can also increase the trial _ A _ A d, s s plus conductor area to reduce the current and reduce the copper loss, accounted for The rate is calculated as follows: ^cp=NcAffc/As: Affc is the wire area, and As is the winding groove (the number of turns is ι Ma. Λ INc wire area is
As繞線槽部（1 5 )面積為U7mm2 Awc=184*0. 5 = 92. 18 mm2 故佔槽率可求得為KCP= 配合參看第八圖及第九 型式定子（1A)形狀，As the winding groove portion (15), the area is U7mm2 Awc=184*0. 5 = 92. 18 mm2, so the groove ratio can be obtained as KCP= with the shape of the eighth and ninth type stator (1A).
NcAffc/As = 92. 18/1 1 7 78.8% 之另 以粉 圖所示，其係本發明馬達 其同樣是由軟磁複合材料 200947831 末冶金技術所製造而成，該定子（1A)具有一圓形的本 體本體中形成穿孔（1 1Α)，以及本體中成型出數個 等間距排列的框架（12Α)，框架（12Α)上所形成的 弧板（1 3 Α)為接續環圈狀，且於弧板（i 3 Α)内壁面 成型出數個等間距排列的齒部（1 4 A )，齒部（1 4 A) 與;jC架（1 2A)之間形成繞線槽部（1 5A)，並於齒部 (14A)上繞設線圈（17)。NcAffc/As = 92. 18/1 1 7 78.8% As shown in the other figure, the motor of the present invention is also manufactured by the soft metal composite material 200947831, the metallurgical technology, the stator (1A) has a circle a perforation (1 1 Α) is formed in the body body, and a plurality of equally spaced frames (12 Α) are formed in the body, and the arc plates (13 Α) formed on the frame (12 Α) are continuous loops, and A plurality of equally spaced teeth (1 4 A ) are formed on the inner wall surface of the arc plate (i 3 Α), and a winding groove portion is formed between the tooth portion (1 4 A) and the jC frame (1 2A). 5A), and a coil (17) is wound around the tooth portion (14A).
因此，經由上述結構特徵、技術内容之詳細說明，可 清楚看出本發明設計特點在於： 提供種「馬達」，其係由軟磁複合材料以粉末冶金 技術所製造而成，該馬達具有一定子及一動子，定子具有 一圓形的本體，本體中形成穿孔，以及本體中成型出數個 等間距排列的框架，框架上形成一弧板，且於弧板内壁面 成型出數個等間距排列的齒部，齒部與框架之間形成繞線 槽部’於Μ上繞韓圈，藉此設計，而能提高繞設線圈 的槽面積’及增加繞線匝數，而能解決傳統動力機具受限 於整體體積’導致馬達推力亦受限制之缺點，使馬達能產 生更高的推力密度’而此-特性亦適用於作為栗浦（pump) 之馬達使用，使馬達的適用範圍更具寬廣應用效益。 【圖式簡單說明】 第一圖：本發明立體外觀圖。 第二圖：本發明立體局部剖視圖。 第三圖.本發明定子示意圖。 11 200947831 第四圖 第五圖 .本發明定子正面剖視圖。 •本發明定子齒部為圓弧形示意圖 〇 圖··本發明定子齒部為圓弧形 第七圖·本發明铡向作動示意圖。 第八圖：本發明另_并】j 一 货月另型式定子立體外觀示意圖 第九圖：本發明另— 空式疋子正面刮視圖。 【主要元件符號說明】 ❹ (1 )定子 (1 1 )穿孔 (1 2 A)框架 (1 3 A)框架 (1 4 A)齒部 (1 5 A)繞線槽部 (1 7 )線圈 (2 〇 )永久磁鐵 (10)本體 (12) 框架 (13) 弧板 (14) 齒部 (15) 繞線槽部 (16) 環槽 (2 )動子 ❹ 12Therefore, through the above detailed description of the structural features and technical contents, it is clear that the design features of the present invention are: providing a "motor" which is manufactured by a soft magnetic composite material by powder metallurgy technology, and the motor has a certain a mover, the stator has a circular body, a perforation is formed in the body, and a plurality of equally spaced frames are formed in the body, an arc plate is formed on the frame, and a plurality of equally spaced rows are formed on the inner wall surface of the arc plate. The tooth portion, the winding portion formed between the tooth portion and the frame is wound around the Han circle, and the design can improve the groove area of the winding coil and increase the number of winding turns, thereby solving the problem of the conventional power tool. Limited to the overall volume 'caused the motor thrust is also limited, so that the motor can produce higher thrust density' and this feature is also suitable for use as a pump for the pump, making the motor more widely applicable. benefit. BRIEF DESCRIPTION OF THE DRAWINGS First FIG.: A perspective view of the present invention. Second Figure: A perspective partial cross-sectional view of the present invention. Third drawing. Schematic diagram of the stator of the present invention. 11 200947831 Fourth Figure Fifth Figure. Front cross-sectional view of the stator of the present invention. • The stator tooth portion of the present invention has a circular arc shape. 〇 Fig. · The stator tooth portion of the present invention has a circular arc shape. Fig. 7 is a schematic view of the lateral motion of the present invention. Figure 8: The present invention is another _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ [Description of main component symbols] ❹ (1) Stator (1 1 ) perforated (1 2 A) frame (1 3 A) frame (1 4 A) tooth (1 5 A) winding groove (1 7 ) coil ( 2 〇) permanent magnet (10) body (12) frame (13) arc plate (14) tooth (15) winding groove (16) ring groove (2) mover ❹ 12