CN106505767A - Surface-mounted high-speed permanent magnet synchronous motor rotor with laminated metal pole spacing - Google Patents
Surface-mounted high-speed permanent magnet synchronous motor rotor with laminated metal pole spacing Download PDFInfo
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- CN106505767A CN106505767A CN201611115857.3A CN201611115857A CN106505767A CN 106505767 A CN106505767 A CN 106505767A CN 201611115857 A CN201611115857 A CN 201611115857A CN 106505767 A CN106505767 A CN 106505767A
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- 239000002184 metal Substances 0.000 title claims abstract description 66
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 66
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 17
- 239000003822 epoxy resin Substances 0.000 claims abstract description 19
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 19
- 238000003475 lamination Methods 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000011218 segmentation Effects 0.000 claims 1
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 15
- 239000004917 carbon fiber Substances 0.000 abstract description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 15
- 239000002131 composite material Substances 0.000 abstract description 9
- 239000011810 insulating material Substances 0.000 abstract description 8
- 125000006850 spacer group Chemical group 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 230000005415 magnetization Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 238000005452 bending Methods 0.000 description 6
- 239000007769 metal material Substances 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/04—Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- Engineering & Computer Science (AREA)
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
具有叠片式金属磁极间隔的表贴式高速永磁同步电机转子，属于高速电机转子技术领域。本发明为解决高速永磁同步电机转子在磁极间采用环氧树脂等绝缘材料磁极间隔进行填充，当电机高速运转时，会造成碳纤维复合材料护套损坏，或者采用金属磁极间隔造成永磁体的高温失磁问题。其转子铁芯套装在转轴上，转子铁芯上设置永磁体，永磁体形成的相邻磁极之间设置叠片式金属磁极间隔；在永磁体和叠片式金属磁极间隔的两侧端面设置磁极压板，由永磁体、叠片式金属磁极间隔和磁极压板共同形成的圆柱面的外圆表面上设置有护套；叠片式金属磁极间隔由多个不导磁金属叠片沿轴向通过之间填充的环氧树脂叠压而成。本发明作为一种高速永磁同步电机转子。
The invention discloses a surface-mounted high-speed permanent magnet synchronous motor rotor with laminated metal magnetic pole intervals, belonging to the technical field of high-speed motor rotors. The present invention solves the problem that the rotor of a high-speed permanent magnet synchronous motor is filled with insulating materials such as epoxy resin for magnetic pole intervals. When the motor runs at high speed, the carbon fiber composite material sheath will be damaged, or the high temperature of the permanent magnet will be caused by the use of metal magnetic pole intervals. Loss of magnetization problem. The rotor iron core is set on the rotating shaft, and the permanent magnet is arranged on the rotor iron core. The laminated metal magnetic pole interval is arranged between the adjacent magnetic poles formed by the permanent magnet; the magnetic poles are arranged on both sides of the permanent magnet and the laminated metal magnetic pole interval. The pressure plate is provided with a sheath on the outer surface of the cylindrical surface formed by the permanent magnet, the laminated metal magnetic pole spacer and the magnetic pole pressure plate; Filled with epoxy resin laminated. The invention is a high-speed permanent magnet synchronous motor rotor.
Description
技术领域technical field
本发明涉及具有叠片式金属磁极间隔的表贴式高速永磁同步电机转子，属于高速电机转子技术领域。The invention relates to a surface-mounted high-speed permanent magnet synchronous motor rotor with laminated metal magnetic pole intervals, and belongs to the technical field of high-speed motor rotors.
背景技术Background technique
表贴式高速永磁同步电机，由于传动效率高、功率密度大、结构简单并且机械强度高，在高速电机领域受到广泛青睐。Surface-mounted high-speed permanent magnet synchronous motors are widely favored in the field of high-speed motors due to their high transmission efficiency, high power density, simple structure and high mechanical strength.
永磁材料抗压强度大，抗拉强度有限，为避免高速离心力作用造成表贴式永磁电机转子的永磁体损坏，通常在永磁体外表面安装不导磁的护套，对永磁体施加预紧力，来进行保护。The permanent magnet material has high compressive strength and limited tensile strength. In order to avoid damage to the permanent magnet of the surface-mounted permanent magnet motor rotor caused by high-speed centrifugal force, a non-magnetic sheath is usually installed on the outer surface of the permanent magnet, and a pre-stressed permanent magnet is applied to the permanent magnet. Tighten to protect.
碳纤维复合材料由于具有高强度、几乎不导电和不导磁的特性，被用做表贴式高速永磁电机的护套材料。这种碳纤维复合材料护套，跟已有的合金钢护套相比，不但有效降低厚度，还能提高转子的机械强度，且产生的涡流损耗很小。但是，碳纤维复合材料护套也存在其自身的缺陷：首先，其抗弯曲能力较差，对于极弧系数小于1的转子结构，在磁极边缘处极易发生护套纤维断裂；其次，其导热性能差，而高速永磁电机转子的高频电磁损耗突出，空气摩擦损耗大，由于没有有效配套的冷却结构，护套将进一步造成转子的散热困难；转子温度过高，会造成永磁材料的高温退磁。这都限制着碳纤维复合材料护套在表贴式高速永磁同步电机上的应用。Due to its high strength, almost non-conductive and non-magnetic properties, carbon fiber composite materials are used as sheath materials for surface-mounted high-speed permanent magnet motors. Compared with the existing alloy steel sheath, this carbon fiber composite sheath not only effectively reduces the thickness, but also improves the mechanical strength of the rotor, and the eddy current loss generated is very small. However, the carbon fiber composite sheath also has its own defects: first, its bending resistance is poor, and for a rotor structure with a pole arc coefficient less than 1, the sheath fiber is prone to breakage at the edge of the magnetic pole; second, its thermal conductivity Poor, but the high-frequency electromagnetic loss of the rotor of the high-speed permanent magnet motor is prominent, and the air friction loss is large. Because there is no effective cooling structure, the sheath will further cause the heat dissipation of the rotor to be difficult; if the rotor temperature is too high, it will cause high temperature of the permanent magnet material. demagnetization. These all limit the application of carbon fiber composite sheaths in surface-mounted high-speed permanent magnet synchronous motors.
金属材料具有与永磁材料相近的机械特性，将实心的金属材料做成金属磁极间隔设置在相邻磁极之间能够解决碳纤维护套受弯曲应力而断裂的问题。但由于金属材料的良好导电性，在高频交变电磁场的作用下，会产生较大的额外电磁损耗，增加转子的散热难度，这使得不宜采用金属材料作磁极间隔材料。为了不至于额外增加转子的电磁损耗，人们采用环氧树脂等绝缘材料填充在磁极之间，来与永磁体共同形成同一圆柱面，以期降低碳纤维护套因受弯曲应力而断裂的风险，提高转子强度。但是环氧树脂等绝缘材料的机械性能与永磁材料相差迥异，转子高速旋转时，环氧树脂等绝缘材料磁极间隔与永磁体产生的应变相差较大，使碳纤维护套受到的弯曲应力问题依然很突出。并且，由于环氧树脂等绝缘材料的导热性能很差，使永磁体损耗只能通过其与端板的接触面传递至端板，及与护套的接触面传递至护套，最后由转子端部和气隙散出，这种不畅通的转子散热方式，导致转子温升很高。Metal materials have mechanical properties similar to those of permanent magnet materials, and making solid metal materials into metal magnetic poles spaced between adjacent magnetic poles can solve the problem of carbon fiber sheaths being fractured by bending stress. However, due to the good conductivity of metal materials, under the action of high-frequency alternating electromagnetic fields, large additional electromagnetic losses will be generated, which will increase the difficulty of heat dissipation of the rotor, which makes it unsuitable to use metal materials as magnetic pole spacing materials. In order not to increase the electromagnetic loss of the rotor, insulating materials such as epoxy resin are used to fill between the magnetic poles to form the same cylindrical surface with the permanent magnets, in order to reduce the risk of the carbon fiber sheath being broken due to bending stress and improve the rotor. strength. However, the mechanical properties of insulating materials such as epoxy resin are quite different from those of permanent magnet materials. When the rotor rotates at high speed, the pole spacing of insulating materials such as epoxy resin is quite different from the strain generated by the permanent magnet, so the bending stress of the carbon fiber sheath remains the same. very prominent. Moreover, due to the poor thermal conductivity of insulating materials such as epoxy resin, the permanent magnet loss can only be transmitted to the end plate through its contact surface with the end plate, and the contact surface with the sheath to the sheath, and finally by the rotor end. This impeded rotor heat dissipation method leads to a high temperature rise of the rotor.
发明内容Contents of the invention
本发明目的是为了解决高速永磁同步电机转子在磁极间采用环氧树脂等绝缘材料磁极间隔进行填充，当电机高速运转时，会造成碳纤维复合材料护套损坏，或者采用金属磁极间隔造成永磁体的高温失磁问题，提供了一种具有叠片式金属磁极间隔的表贴式高速永磁同步电机转子。The purpose of the present invention is to solve the problem that the rotor of a high-speed permanent magnet synchronous motor is filled with insulating materials such as epoxy resin for magnetic pole intervals. When the motor runs at high speed, the carbon fiber composite sheath will be damaged, or the permanent magnets will be caused by metal magnetic pole intervals. To solve the problem of high temperature loss of magnetism, a surface-mounted high-speed permanent magnet synchronous motor rotor with laminated metal magnetic pole spacing is provided.
本发明所述具有叠片式金属磁极间隔的表贴式高速永磁同步电机转子，它包括转轴、转子铁芯、永磁体、磁极压板和护套，它还包括叠片式金属磁极间隔，The surface-mounted high-speed permanent magnet synchronous motor rotor with laminated metal magnetic pole intervals described in the present invention includes a rotating shaft, a rotor core, a permanent magnet, a magnetic pole pressure plate and a sheath, and it also includes a laminated metal magnetic pole interval,
转子铁芯套装在转轴上，转子铁芯的外圆表面上设置永磁体，永磁体形成的相邻磁极之间设置叠片式金属磁极间隔；在永磁体和叠片式金属磁极间隔的两侧端面设置磁极压板，由永磁体、叠片式金属磁极间隔和磁极压板共同形成的圆柱面的外圆表面上设置有护套；The rotor iron core is set on the rotating shaft, and the permanent magnet is arranged on the outer surface of the rotor iron core, and the laminated metal magnetic pole interval is arranged between the adjacent magnetic poles formed by the permanent magnet; on both sides of the permanent magnet and the laminated metal magnetic pole interval The end face is equipped with a magnetic pole pressure plate, and a sheath is provided on the outer surface of the cylindrical surface formed by the permanent magnet, the laminated metal magnetic pole interval and the magnetic pole pressure plate;
叠片式金属磁极间隔由多个不导磁金属叠片沿轴向叠压而成，相邻不导磁金属叠片之间填充环氧树脂。The laminated metal pole spacing is formed by laminating multiple non-magnetic metal laminations along the axial direction, and epoxy resin is filled between adjacent non-magnetic metal laminations.
本发明的优点：本发明所述的叠片式金属磁极间隔具有金属的良好导热性，同时由于薄层金属叠片通过环氧树脂粘结而成，这样保证了相邻金属叠片间的绝缘，使其在高频交变电磁场作用下，几乎不产生电磁损耗。Advantages of the present invention: the laminated metal magnetic pole spacing of the present invention has good thermal conductivity of metal, and at the same time, since the thin metal laminations are bonded by epoxy resin, the insulation between adjacent metal laminations is ensured. , so that under the action of high-frequency alternating electromagnetic field, there is almost no electromagnetic loss.
所述电机转子采用叠片式金属磁极间隔放置在相邻磁极之间，叠片式金属磁极间隔采用不导磁金属叠片沿轴向叠压而成，它在转子的运行过程中几乎不产生电磁损耗，它又同时具有金属的良好导热性，能够将永磁体中的涡流损耗通过磁极间隔有效传导至转子的护套、磁极压板中，再通过电机气隙、端部散出。本发明中使用的叠片式金属磁极间隔，在材质上采用了金属材质，这打破了传统技术手段中认为的金属由于会产生较大电磁损耗而放弃在磁极间隔中使用的局面，并且，它既很好的利用了金属材料的导热性，来增加永磁体损耗的散热途径，有效降低永磁体温升；又利用了不导磁金属叠片的特性，几乎不产生电磁损耗，由此，在总体上降低了永磁体发生高温不可逆退磁的风险。The rotor of the motor is placed between adjacent magnetic poles at intervals of laminated metal poles, and the interval between laminated metal poles is made of non-magnetic metal laminations laminated in the axial direction, which hardly produces any damage during the operation of the rotor. Electromagnetic loss, which also has good thermal conductivity of metal, can effectively conduct the eddy current loss in the permanent magnet to the sheath of the rotor and the magnetic pole pressure plate through the magnetic pole interval, and then dissipate it through the air gap and end of the motor. The laminated metal magnetic pole interval used in the present invention adopts metal material in material, which breaks the situation in the traditional technical means that the use of metal in the magnetic pole interval is abandoned due to the large electromagnetic loss, and it It not only makes good use of the thermal conductivity of metal materials to increase the heat dissipation of permanent magnet losses, effectively reducing the temperature rise of permanent magnets; it also utilizes the characteristics of non-magnetic metal laminations, which hardly produces electromagnetic losses. Therefore, in Overall, the risk of high-temperature irreversible demagnetization of permanent magnets is reduced.
本发明采用的叠片式金属磁极间隔，既能降低碳纤维护套的弯曲应力，同时不增加转子的额外电磁损耗，还有效增加了永磁体的散热途径，降低永磁材料温升，对该类型电机的发展具有重要意义。The laminated metal magnetic pole spacing adopted by the present invention can not only reduce the bending stress of the carbon fiber sheath, but also not increase the additional electromagnetic loss of the rotor, and effectively increase the heat dissipation path of the permanent magnet and reduce the temperature rise of the permanent magnet material. The development of electric motors is of great significance.
附图说明Description of drawings
图1是本发明所述具有叠片式金属磁极间隔的表贴式高速永磁同步电机转子的结构示意图；Fig. 1 is the structural representation of the surface-mounted high-speed permanent magnet synchronous motor rotor with laminated metal magnetic pole spacing according to the present invention;
图2是图1的侧视结构示意图；Fig. 2 is a side view structural schematic diagram of Fig. 1;
图3是叠片式金属磁极间隔的单个不导磁金属叠片示意图；Fig. 3 is a schematic diagram of a single non-magnetic metal lamination with a laminated metal magnetic pole interval;
图4是轴向叠压固化完成后的叠片式金属磁极间隔的整体结构示意图。Fig. 4 is a schematic diagram of the overall structure of the laminated metal magnetic pole interval after the axial lamination and solidification is completed.
具体实施方式detailed description
具体实施方式一：下面结合图1至图4说明本实施方式，本实施方式所述具有叠片式金属磁极间隔的表贴式高速永磁同步电机转子，它包括转轴1、转子铁芯2、永磁体3、磁极压板4和护套5，它还包括叠片式金属磁极间隔6，Specific Embodiment 1: The present embodiment will be described below in conjunction with FIGS. 1 to 4. The surface-mounted high-speed permanent magnet synchronous motor rotor with laminated metal pole spacing described in this embodiment includes a rotating shaft 1, a rotor core 2, Permanent magnet 3, magnetic pole pressing plate 4 and sheath 5, it also includes laminated metal magnetic pole spacer 6,
转子铁芯2套装在转轴1上，转子铁芯2的外圆表面上设置永磁体3，永磁体3形成的相邻磁极之间设置叠片式金属磁极间隔6；在永磁体3和叠片式金属磁极间隔6的两侧端面设置磁极压板4，由永磁体3、叠片式金属磁极间隔6和磁极压板4共同形成的圆柱面的外圆表面上设置有护套5；The rotor core 2 is set on the rotating shaft 1, and the permanent magnet 3 is arranged on the outer surface of the rotor iron core 2, and the laminated metal magnetic pole interval 6 is arranged between the adjacent magnetic poles formed by the permanent magnet 3; between the permanent magnet 3 and the lamination Magnetic pole pressure plates 4 are arranged on both sides of the type metal magnetic pole interval 6, and a sheath 5 is provided on the outer surface of the cylindrical surface formed by the permanent magnet 3, the laminated metal magnetic pole interval 6 and the magnetic pole pressure plate 4;
叠片式金属磁极间隔6由多个不导磁金属叠片6-1沿轴向叠压而成，相邻不导磁金属叠片6-1之间填充环氧树脂。The laminated metal magnetic pole spacer 6 is formed by laminating a plurality of non-magnetic metal laminations 6-1 in the axial direction, and epoxy resin is filled between adjacent non-magnetic metal laminations 6-1.
永磁体3、叠片式金属磁极间隔6和磁极压板4的外圆表面共同拼接成一个共面的圆柱面。磁极压板4的作用是对永磁体和磁极间隔进行轴向固定。磁极压板内圆表面套装在转轴上，外表面与永磁体、磁极间隔在同一圆柱面上。在永磁体、磁极间隔和磁极压板的外圆柱面上，以一定张力缠绕预浸了环氧树脂的碳纤维，缠绕成护套5，对永磁体具有施加预紧力作用。The permanent magnet 3, the laminated metal magnetic pole spacer 6 and the outer circular surface of the magnetic pole pressure plate 4 are jointly spliced into a coplanar cylindrical surface. The function of the magnetic pole pressing plate 4 is to axially fix the permanent magnet and the magnetic pole spacing. The inner circular surface of the magnetic pole pressing plate is sleeved on the rotating shaft, and the outer surface is spaced on the same cylindrical surface as the permanent magnet and the magnetic pole. On the outer cylindrical surface of the permanent magnet, the magnetic pole spacer and the magnetic pole pressure plate, the carbon fiber pre-impregnated with epoxy resin is wound with a certain tension to form a sheath 5, which exerts a pre-tightening force on the permanent magnet.
转子铁芯2的外圆表面上设置有凹槽，凹槽的个数与永磁体3形成的磁极的个数相匹配，每个凹槽内固定用于形成一个磁极的永磁体3，相邻凹槽之间的凸台上粘接叠片式金属磁极间隔6。所述的转子铁芯2由硅钢片叠压而成，其外表面可开设浅口凹槽，用于永磁体安装时候的定位。永磁体3和叠片式金属磁极间隔6可通过环氧树脂胶粘接在铁芯外表面，并使得它们的外表面共同拼接成一个圆柱面。Grooves are arranged on the outer surface of the rotor core 2, the number of the grooves matches the number of magnetic poles formed by the permanent magnets 3, and a permanent magnet 3 for forming a magnetic pole is fixed in each groove, adjacent to each other. Laminated metal magnetic pole spacers 6 are glued on the bosses between the grooves. The rotor core 2 is made of laminated silicon steel sheets, and its outer surface can be provided with shallow grooves for positioning when permanent magnets are installed. The permanent magnet 3 and the laminated metal magnetic pole spacer 6 can be bonded to the outer surface of the iron core by epoxy resin, and their outer surfaces are spliced together to form a cylindrical surface.
每个磁极的永磁体3沿圆周向由多个呈瓦片状的永磁体分段构成，并根据永磁体的轴向长度，对其进行轴向分段，降低高频涡流损耗。The permanent magnet 3 of each magnetic pole is composed of a plurality of tile-shaped permanent magnet segments along the circumferential direction, and is axially segmented according to the axial length of the permanent magnet to reduce high-frequency eddy current loss.
叠片式金属磁极间隔6采用的不导磁金属叠片为薄层的不导磁金属叠片，相邻叠片之间浸满环氧树脂，以增加叠片间的绝缘电阻，将所有薄层的不导磁金属叠片轴向加压固化后形成的叠片式金属磁极间隔6的等效叠压系数不低于0.95。The non-magnetic metal laminations used in the laminated metal magnetic pole interval 6 are thin non-magnetic metal laminations, and the adjacent laminations are filled with epoxy resin to increase the insulation resistance between the laminations. The equivalent lamination coefficient of the laminated metal magnetic pole spacing 6 formed after the non-magnetic metal laminations of the first layer are axially pressed and solidified is not less than 0.95.
护套5由碳纤维预浸环氧树脂缠绕而成。The sheath 5 is wound from carbon fiber pre-impregnated with epoxy resin.
本发明的叠片式金属磁极间隔6由薄层金属叠片通过环氧树脂粘结而成，这样保证了相邻金属叠片间的绝缘，使其在高频交变电磁场作用下，几乎不产生电磁损耗。它同时保持了金属磁极间隔在解决碳纤维复合材料护套受弯曲应力问题上的优势，提高了转子机械强度。The laminated metal magnetic pole interval 6 of the present invention is made of thin metal laminations bonded by epoxy resin, which ensures the insulation between adjacent metal laminations, so that it is almost inert under the action of high-frequency alternating electromagnetic field produce electromagnetic losses. At the same time, it maintains the advantages of metal magnetic pole spacing in solving the problem of bending stress on the carbon fiber composite sheath, and improves the mechanical strength of the rotor.
本发明的电机转子具有较高的机械强度，将首次提出的叠片式金属磁极间隔6这种金属叠片结构使用于本发明转子中，其机械强度优于采用环氧树脂等绝缘材料磁极间隔的转子；同时本发明中永磁体温升低于采用环氧树脂等绝缘材料磁极间隔的转子，它提高了电机的可靠性，能够极大推进碳纤维复合材料在表贴式高速永磁同步电机上应用。相比于传统高强度合金钢护套电机，碳纤维复合材料护套电机，由于本发明采用的不导磁护套的厚度能够大大降低，有效的提升了转子的气隙磁密，进而提高了电机的功率密度。因而，本发明对于高速工业应用领域具有重要意义。The motor rotor of the present invention has higher mechanical strength. The metal lamination structure of the first proposed laminated metal magnetic pole spacing 6 is used in the rotor of the present invention, and its mechanical strength is better than that of insulating materials such as epoxy resin for magnetic pole spacing. At the same time, the temperature rise of the permanent magnets in the present invention is lower than that of the rotors using insulating materials such as epoxy resin for magnetic pole spacing, which improves the reliability of the motor and can greatly promote the application of carbon fiber composite materials on surface-mounted high-speed permanent magnet synchronous motors. application. Compared with traditional high-strength alloy steel sheathed motors and carbon fiber composite material sheathed motors, since the thickness of the non-magnetic sheath used in the present invention can be greatly reduced, the air-gap magnetic density of the rotor is effectively improved, thereby improving the performance of the motor. power density. Therefore, the present invention is of great significance to the field of high-speed industrial applications.
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