CN111900837A - Device and method for directly cooling end winding of flat permanent magnet motor - Google Patents
Device and method for directly cooling end winding of flat permanent magnet motor Download PDFInfo
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- CN111900837A CN111900837A CN202010365652.0A CN202010365652A CN111900837A CN 111900837 A CN111900837 A CN 111900837A CN 202010365652 A CN202010365652 A CN 202010365652A CN 111900837 A CN111900837 A CN 111900837A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
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Abstract
Description
技术领域technical field
本发明涉及永磁电机技术领域,特别是一种扁平型永磁电机端部绕组直接冷却装置及方法。The invention relates to the technical field of permanent magnet motors, in particular to a device and method for direct cooling of end windings of a flat permanent magnet motor.
背景技术Background technique
相比传统异步电机和电励磁同步电机,永磁电机具有功率密度高、效率高等显著优势,在新能源电动汽车驱动与发电系统、风力发电系统等场合具有重要的应用价值 和广阔的应用前景。而永磁电机的冷却散热直接决定了电机内部的绕组电流密度,提 升电机的散热能力,是提高电机功率密度最直接的方法。永磁电机一般设计为内封闭 系统,往往采用全封闭结构设计,其散热方式主要有机壳风冷、机壳液冷和电机内部 油冷等方式。点击内部油冷方式是最为优良的一种散热方式,可以大幅提升电机功率, 但是电机内部油道结构设计复杂,可靠性差,并且油冷电机的使用维护也是一个短板。 目前针对高功率密度永磁电机散热的主要方式仍然是水冷方式,然而水冷永磁电机长 期稳定运行的绕组电流密度一般最大不能超过10A/mm2。Compared with traditional asynchronous motors and electric excitation synchronous motors, permanent magnet motors have significant advantages of high power density and high efficiency, and have important application value and broad application prospects in new energy electric vehicle drive and power generation systems, wind power generation systems and other occasions. The cooling and heat dissipation of the permanent magnet motor directly determines the winding current density inside the motor, and improving the heat dissipation capacity of the motor is the most direct method to improve the power density of the motor. Permanent magnet motors are generally designed as an internal closed system, often using a fully enclosed structure design. The internal oil cooling method is the most excellent heat dissipation method, which can greatly increase the power of the motor. However, the internal oil passage structure of the motor is complicated in design, the reliability is poor, and the use and maintenance of the oil-cooled motor is also a shortcoming. At present, the main way to dissipate heat for high-power-density permanent magnet motors is still water-cooling. However, the winding current density of water-cooled permanent magnet motors for long-term stable operation generally cannot exceed 10A/mm 2 at most.
在一些特殊场合应用,例如轮毂驱动、透平发电等,对电机的长径比具有严格要求,一般希望在这些场合电机的外径较大,轴向长度较小。由于水冷电机冷却机壳上 设置水道,电机定子上绕组和铁心产生的热量通过定子铁心外圆与机壳内壁接触散热, 因此电机呈扁平状,其定子与机壳接触面小,其散热能力也受到了一定的限制。另外, 对于这种扁平型的永磁电机,绕组端部占比大,端部绕组与暴露在电机内部的空气汇 总,绕组端部损耗的散热成为了主要问题,也直接限制了电机功率的提升。为了解决 这个问题,发明专利CN 107659018 A公开了一种加强电机端部冷却的可拆卸式热管 冷却结构,安装于电机端部两侧,用于同时对端部绕组、端部空气和转子进行冷却; 然而该专利中热管采用了弯曲结构,增加了结构复杂程度,且热管围绕在端部绕组外 圈,接触面有限,难以充分发挥热管的散热能力。发明专利CN 109428422 A公开了 一种电机绕组端部冷却装置及冷却系统,其端部设置有冷却管道,冷却管道与绕组端 部直接接触,冷却介质在所述冷却管路内流动以对定子绕组端部进行冷却;同理这种 冷却结构复杂,冷却管道设计加工制造困难,且散热能力有待进一步提高。专利CN 109314444 A公开的电动机冷却系统可以实现端部的油冷,但是其结构复杂。针对轮 毂电机其长径比小的特点,专利CN 108270301 A公开了一种具有绕组端部冷却结构 的定子结构及其电机,采用定子端部灌封密封,形成冷却回路,其实质是一种油冷方 式,冷却效果较好,但是密封型和结构可靠性有待进一步验证。专利CN108964318 A 公开了一种电机定子绕组的复合灌封冷却结构,其在定子绕组端部与机壳之间设置有 热管,且热管为异形结构;热管的吸热端与绕组端部外圈紧密接触,热管的冷却端与 机壳内壁紧密接触,接触部位的机壳内部有冷却水道,采用绝缘导热灌封胶将从电机绕组端部至机壳内壁的空心圆柱体区域灌封,形成复合灌封冷却结构,这种结构热管 结构复杂,工艺实现差,且也是在绕组端部外圈接触散热,灌封工艺成本高。In some special occasions, such as wheel hub drive, turbine power generation, etc., there are strict requirements on the length-diameter ratio of the motor. Generally, the outer diameter of the motor is expected to be large and the axial length of the motor is small in these occasions. Because the water channel is set on the cooling casing of the water-cooled motor, the heat generated by the windings and the iron core of the motor stator is dissipated through the contact between the outer circle of the stator iron core and the inner wall of the casing, so the motor is flat, and the contact surface between the stator and the casing is small, and its heat dissipation capacity is also low. subject to certain restrictions. In addition, for this flat permanent magnet motor, the winding ends account for a large proportion, and the end windings are combined with the air exposed inside the motor. The heat dissipation of the winding ends has become a major problem, which directly limits the improvement of the motor power. . In order to solve this problem, the invention patent CN 107659018 A discloses a detachable heat pipe cooling structure for strengthening the cooling of the motor end, which is installed on both sides of the motor end for cooling the end winding, the end air and the rotor at the same time ; However, the heat pipe in this patent adopts a curved structure, which increases the complexity of the structure, and the heat pipe is surrounded by the outer ring of the end winding, and the contact surface is limited, so it is difficult to give full play to the heat dissipation capacity of the heat pipe. Invention patent CN 109428422 A discloses a motor winding end cooling device and cooling system, the end of which is provided with cooling pipes, the cooling pipes are in direct contact with the winding ends, and the cooling medium flows in the cooling pipes to cool the stator windings. The end is cooled; in the same way, the cooling structure is complex, the design and manufacture of the cooling pipe is difficult, and the heat dissipation capacity needs to be further improved. The motor cooling system disclosed in the patent CN 109314444 A can realize the oil cooling of the end, but its structure is complicated. In view of the small aspect ratio of the in-wheel motor, the patent CN 108270301 A discloses a stator structure with a winding end cooling structure and its motor. The stator end is potted and sealed to form a cooling circuit, which is essentially a kind of oil The cooling method has a better cooling effect, but the sealing type and structural reliability need to be further verified. Patent CN108964318 A discloses a composite potting and cooling structure for motor stator windings, wherein a heat pipe is arranged between the stator winding end and the casing, and the heat pipe is a special-shaped structure; Contact, the cooling end of the heat pipe is in close contact with the inner wall of the casing, and there is a cooling water channel inside the casing at the contact part. The insulating and heat-conducting potting glue is used to encapsulate the hollow cylinder area from the end of the motor winding to the inner wall of the casing to form a composite potting. Sealing and cooling structure, the heat pipe structure of this structure is complex, the process is poor, and the outer ring of the winding end is also contacted to dissipate heat, and the cost of the potting process is high.
从目前现有公开的专利文献来看,电机端部绕组的冷却已经具有较大的技术进步和先进性,然而无论是利用热管还是端部灌封,抑或是端部密封油冷,其总体结构复 杂,导致生产成本相对较高以及故障率相对较高,且散热能力有待进一步提高,针对 扁平型永磁电机的绕组高效冷却方案还存在较大的技术缺陷。From the current published patent documents, the cooling of the motor end windings has achieved great technological progress and advancement. However, whether it is using heat pipes, end potting, or end sealing oil cooling, its overall structure It is complicated, resulting in relatively high production cost and relatively high failure rate, and the heat dissipation capacity needs to be further improved. The high-efficiency cooling solution for the winding of the flat permanent magnet motor still has major technical defects.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种结构简单、容易实现、散热能力强的扁平型永磁电机端部绕组冷却装置及方法,且前期加工制造难度和后期维护成本低、适用性强。The purpose of the present invention is to provide a flat permanent magnet motor end winding cooling device and method with a simple structure, easy implementation and strong heat dissipation capability, and low pre-processing difficulty and post-maintenance cost, and strong applicability.
实现本发明目的的技术解决方案为:一种扁平型永磁电机端部绕组直接冷却装置, 包括水冷机壳、定子铁心、导热管、电枢绕组和端部导热环;The technical solution to achieve the purpose of the present invention is: a flat permanent magnet motor end winding direct cooling device, including a water-cooled casing, a stator core, a heat conduction pipe, an armature winding and an end heat conduction ring;
所述定子铁心安装于水冷机壳内腔,定子铁心外部设置电枢绕组;所述水冷机壳内部设置有冷却水道,冷却水道在轴向方向覆盖定子铁芯和电枢绕组的端部;绕好电 枢绕组的定子铁心安装于水冷机壳内腔,定子铁心和电枢绕组的端部与水冷机壳之间 的空心圆柱体间隙区域安装端部导热环,并且端部导热环与水冷机壳和电枢绕组紧密 接触;所述端部导热环沿圆周方向开有若干个孔,导热管的冷却端装配在端部导热环 的圆周孔上,端部导热环外壁与水冷机壳紧密接触贴合;导热管沿着圆周方向径向穿 过端部导热环的圆孔后进入电枢绕组。The stator iron core is installed in the inner cavity of the water-cooled casing, and the armature winding is arranged outside the stator iron core; the cooling water channel is arranged inside the water-cooled casing, and the cooling water channel covers the end of the stator iron core and the armature winding in the axial direction; The stator core of the good armature winding is installed in the inner cavity of the water-cooled casing, and the end heat-conducting ring is installed in the hollow cylinder gap area between the ends of the stator core and the armature winding and the water-cooled casing, and the end heat-conducting ring is connected to the water-cooled machine. The shell is in close contact with the armature winding; the end heat-conducting ring has several holes in the circumferential direction, the cooling end of the heat-conducting pipe is assembled on the circumferential hole of the end heat-conducting ring, and the outer wall of the end heat-conducting ring is in close contact with the water-cooled casing Fitting; the heat pipe passes through the circular hole of the heat conducting ring at the end radially along the circumferential direction and then enters the armature winding.
进一步地,所述端部导热环的轴向长度与定子铁心和电枢绕组端部的长度相同,且端部导热环的内壁与电枢绕组紧密接触,使电枢绕组通过端部导热环散热;所述端 部导热环与定子铁心和电枢绕组端部之间包裹绝缘纸,以确保定子铁心和电枢绕组之 间绝缘。Further, the axial length of the end heat conduction ring is the same as the length of the stator core and the end of the armature winding, and the inner wall of the end heat conduction ring is in close contact with the armature winding, so that the armature winding dissipates heat through the end heat conduction ring. ; Wrap insulating paper between the end heat conducting ring and the stator core and the ends of the armature windings to ensure insulation between the stator core and the armature windings.
进一步地,所述端部导热环与水冷机壳接触的对应位置上设置有冷却水道,用于水冷机壳对定子铁心内部的散热。Further, a cooling water channel is provided at a corresponding position where the end heat conducting ring is in contact with the water-cooled casing, which is used for the cooling of the inside of the stator core by the water-cooled casing.
进一步地,所述导热管表面做钝化处理、绝缘喷漆或环氧树脂包覆处理。Further, the surface of the heat conducting pipe is subjected to passivation treatment, insulating spray paint or epoxy resin coating treatment.
进一步地,所述端部导热环内部设置有环形水道和冷却液进出口,环形水道避开导热管插孔;冷却液进出口与水冷机壳上的冷却水道串联连接。Further, an annular water channel and a cooling liquid inlet and outlet are arranged inside the end heat conduction ring, and the annular water channel avoids the heat conduction pipe jack; the cooling liquid inlet and outlet are connected in series with the cooling water channel on the water-cooled casing.
一种扁平型永磁电机端部绕组直接冷却方法,包括以下步骤:A direct cooling method for the end winding of a flat permanent magnet motor, comprising the following steps:
步骤1、先加工好端部导热环,沿着端部导热环圆周方向设置若干个安装孔,孔 径与导热管的外径匹配;Step 1. Process the end heat conduction ring first, and set several mounting holes along the circumferential direction of the end heat conduction ring, and the hole diameter matches the outer diameter of the heat conduction pipe;
步骤2、通过工装在定子铁心上嵌装电枢绕组,在电枢绕组端部沿圆周方向预留与端部导热环上数量一致的插孔,插孔直径与导热管的外径匹配;
步骤3、将端部导热环安装到定子铁心和电枢绕组端部外圈上,端部导热环上的插孔与电枢绕组端部插孔对应设置,使导热管从外圆插入到端部导热环和电枢绕组端 部插孔内;
步骤4、将安装组合好的定子热套置入水冷机壳内。
本发明与现有技术相比,其显著优点在于:(1)端部绕组和散热部件直接接触, 解决了封闭式电机端部绕组散热问题;(2)采用热管或高导热管作为冷却结构主体, 充分利用了热管高传热效率的特点,弥补了端部空气导热系数小的缺点,热管或高导 热管且为直棒结构,无需弯曲异形处理,容易加工;(3)绕组端部增设了端部导热环, 其与绕组紧密接触,提高了电机的散热能力,整个散热方案没有额外的需要密封的结 构设计,因此可靠性高,易于维护;(4)冷却结构设计在端部,不需要另外增大电机 体积,对已成型电机同样适用,提升了功率密度。Compared with the prior art, the present invention has significant advantages as follows: (1) the end winding and the heat dissipation component are in direct contact, which solves the problem of heat dissipation of the end winding of the closed motor; (2) the heat pipe or high thermal conductivity pipe is used as the main body of the cooling structure , Make full use of the characteristics of high heat transfer efficiency of the heat pipe, make up for the shortcoming of the small thermal conductivity of the air at the end, the heat pipe or high thermal conductivity pipe is a straight rod structure, no need to bend special-shaped processing, and it is easy to process; (3) The end of the winding is added The heat conduction ring at the end, which is in close contact with the winding, improves the heat dissipation capacity of the motor. The whole heat dissipation scheme has no additional structural design that needs to be sealed, so it has high reliability and is easy to maintain; (4) The cooling structure is designed at the end and does not require In addition, the volume of the motor is increased, which is also applicable to the formed motor, which improves the power density.
附图说明Description of drawings
图1是本发明一种扁平型永磁电机端部绕组直接冷却装置的结构示意图。FIG. 1 is a schematic structural diagram of a flat type permanent magnet motor end winding direct cooling device according to the present invention.
图2是本发明实施例中采用的热管的原理示意图。FIG. 2 is a schematic diagram of the principle of the heat pipe used in the embodiment of the present invention.
图3是本发明实施例中端部导热环与导热管集成结构的结构示意图,其中(a)是正视图,(b)是侧视图。FIG. 3 is a schematic structural diagram of an integrated structure of an end heat conducting ring and a heat conducting pipe in an embodiment of the present invention, wherein (a) is a front view and (b) is a side view.
图4是本发明实施例中定子与端部导热集成结构的结构示意图。FIG. 4 is a schematic structural diagram of a heat conduction integrated structure of a stator and an end portion in an embodiment of the present invention.
图5是本发明实施例中扁平型分数槽集中绕组永磁电机绕组端部冷却结构的装配爆炸图。FIG. 5 is an assembly exploded view of the cooling structure of the winding end of the flat fractional slot concentrated winding permanent magnet motor in the embodiment of the present invention.
图6是本发明实施例中扁平型分数槽集中绕组永磁电机绕组端部冷却结构的装配体结构示意图,其中(a)是正视图,(b)是侧视图。6 is a schematic view of the assembly structure of the winding end cooling structure of the flat fractional slot concentrated winding permanent magnet motor in the embodiment of the present invention, wherein (a) is a front view and (b) is a side view.
具体实施方式Detailed ways
下面结合附图和具体实施例对本发明作进一步详细说明。The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
结合图1,本发明一种扁平型永磁电机端部绕组直接冷却装置,包括水冷机壳1、定子铁心2、导热管3、电枢绕组4和端部导热环5;1, a flat permanent magnet motor end winding direct cooling device of the present invention includes a water-cooled casing 1, a
所述定子铁心2安装于水冷机壳1内腔,定子铁心2外部设置电枢绕组4;所述 水冷机壳1内部设置有冷却水道1-1,冷却水道1-1在轴向方向覆盖定子铁芯2和电 枢绕组4的端部;绕好电枢绕组4的定子铁心2安装于水冷机壳1内腔,定子铁心2 和电枢绕组4的端部与水冷机壳1之间的空心圆柱体间隙区域安装端部导热环5,并 且端部导热环5与水冷机壳1和电枢绕组4紧密接触;所述端部导热环5沿圆周方向 开有若干个孔,导热管3的冷却端装配在端部导热环5的圆周孔上,端部导热环5外 壁与水冷机壳1紧密接触贴合,以减小热阻提高传热效率;导热管3沿着圆周方向径 向穿过端部导热环5的圆孔后进入电枢绕组4。The
进一步地,所述端部导热环5的轴向长度与定子铁心2和电枢绕组4端部的长度 相同,且端部导热环5的内壁与电枢绕组4紧密接触,使以电枢绕组4通过端部导热 环5散热;所述端部导热环5与定子铁心2和电枢绕组4端部之间包裹绝缘纸6,以 确保定子铁心2和电枢绕组4之间绝缘安全。Further, the axial length of the end
进一步地,所述端部导热环5与水冷机壳1接触的对应位置上设置有冷却水道, 提高水冷机壳1对定子铁心2内部的散热能力。Further, a cooling water channel is provided at the corresponding position where the end
进一步地,所述导热管3表面做钝化处理、绝缘喷漆或环氧树脂包覆处理,从而 提高导热管3与电枢绕组4之间的绝缘电阻。Further, the surface of described heat-conducting
进一步地,所述端部导热环5内部设置有环形水道和冷却液进出口,环形水道避开导热管3插孔;冷却液进出口与水冷机壳1上的冷却水道1-1串联连接,实现高效 冷却。Further, the end
一种扁平型永磁电机端部绕组直接冷却方法,包括以下步骤:A direct cooling method for the end winding of a flat permanent magnet motor, comprising the following steps:
步骤1、先加工好端部导热环5,沿着端部导热环5圆周方向设置若干个安装孔, 其孔径与导热管3的外径匹配;Step 1. Process the end
步骤2、通过工装在定子铁心2上嵌装电枢绕组4,在电枢绕组4端部沿圆周方 向预留与端部导热环5上数量一致的插孔,插孔直径与导热管3的外径匹配;
步骤3、将端部导热环5安装到定子铁心2和电枢绕组4端部外圈上,端部导热 环5上的插孔与电枢绕组4端部插孔对应设置,从而便于导热管3从外圆插入到端部 导热环5和电枢绕组4端部插孔内;
步骤4、将安装组合好的定子热套置入水冷机壳1内。
实施例1Example 1
本实施例采用的导热管3为具有高导热率的相变热管,相变热管的基本散热原理与结构如图2所示。The
本实施例中端部导热环5与导热管3安装总成如图3所示,端部导热环5沿着圆 周方向开有16个孔,安装了16个导热管3,图3(a)是本发明实施例中端部导热环 5与导热管3集成结构正视图,图3(b)是本发明实施例中端部导热环5与导热管3 集成结构侧视图。In this embodiment, the installation assembly of the end
端部导热环5外壁与水冷机壳1紧密接触贴合,以减小热阻,提高传热效率。导 热管3沿着圆周方向径向穿过端部导热环5的圆孔后进入绕组端部。为了实现导热管 3吸热端与绕组端部的紧密接触,在绕组下线过程中在绕组端部留出导热管3安装的 孔。The outer wall of the end
本发明实施例定子铁心2是一个整数分布绕组结构,如图4所示,端部导热环5 安装在定子铁心2的绕组端部上,且端部导热环5与端部绕组预留的孔一一对应,以 便导热管3插入。The
进一步的,导热管3的轴向长度与绕组端部的长度保持一致,且端部导热环5的 内壁与绕组端部紧密接触,以加强绕组通过端部导热环5散热的效果;端部导热环5 与绕组端部之间包裹绝缘纸6,以确保定子绕组绝缘安全。Further, the axial length of the
进一步的,导热管3与定子机壳1接触的对应位置上设置有定子机壳水道1-1, 确保定子机壳1对定子铁心2的散热能力。Further, a stator casing water channel 1 - 1 is provided at a corresponding position where the
进一步的,导热管3表面做钝化处理、绝缘喷漆或环氧树脂包覆处理,从而提高 导热管3与绕组之间的绝缘电阻。Further, the surface of the
作为一种具体示例,所述端部导热环5内部设置有环形水道和冷却液进出口,环形水道避开导热管3插孔位置;冷却液进出口与定子机壳水道1-1串联连接,实现高 效冷却。As a specific example, the end
图5给出了本发明实施例扁平型分数槽集中绕组永磁电机绕组端部冷却结构装配完成后的装配爆炸图。FIG. 5 shows an assembly exploded view after the assembly of the cooling structure at the end of the winding of the flat fractional slot concentrated winding permanent magnet motor according to the embodiment of the present invention is completed.
图6(a)给出了本发明实施例扁平型分数槽集中绕组永磁电机绕组端部冷却结构装配完成后的装配体正视图。Fig. 6(a) shows the front view of the assembled body after the cooling structure of the winding end of the flat fractional slot concentrated winding permanent magnet motor according to the embodiment of the present invention is assembled.
图6(b)给出了本发明实施例扁平型分数槽集中绕组永磁电机绕组端部冷却结构装配完成后的装配体侧视图。Fig. 6(b) shows the side view of the assembled body after the cooling structure of the winding end of the flat fractional slot concentrated winding permanent magnet motor according to the embodiment of the present invention is assembled.
本实施例的端部散热主要原理描述如下:The main principle of the end heat dissipation in this embodiment is described as follows:
将导热管3插入定子铁心2的绕组端部中,蒸发端进入绕组端部,冷凝端与端部 导热环5连接一起,绕组端部通电后产生大量焦耳热,由于导热管3内部的工质相变, 蒸发端吸收的大量热能进入冷凝端,导热管3冷凝端与端部导热环5紧密接触,具有 优良的传热效果,从而可以将大量热量传递到端部导热环5,端部导热环5外圈通过 绝缘纸6与定子机壳1接触,将热能有效的传入机壳冷却水道1-1的水中从而将热能 带走。Insert the
本发明端部绕组和散热部件直接接触,解决了封闭式电机端部绕组散热问题;采用热管或高导热管作为冷却结构主体,充分利用了热管高传热效率的特点,弥补了端 部空气导热系数小的缺点,热管或高导热管且为直棒结构,无需弯曲异形处理,容易 加工;绕组端部增设了端部导热环,其与绕组紧密接触,提高了电机的散热能力,整 个散热方案没有额外的需要密封的结构设计,因此可靠性高,易于维护;冷却结构设 计在端部,不需要另外增大电机体积,对已成型电机同样适用,提升了功率密度。The end winding of the invention is in direct contact with the heat dissipation component, which solves the heat dissipation problem of the end winding of the closed motor; the heat pipe or the high heat conduction pipe is used as the main body of the cooling structure, and the characteristics of high heat transfer efficiency of the heat pipe are fully utilized, which makes up for the heat conduction of the air at the end. Disadvantage of small coefficient, heat pipe or high heat conduction pipe and straight rod structure, no need to bend special-shaped treatment, easy to process; end heat conduction ring is added at the end of the winding, which is in close contact with the winding, which improves the heat dissipation capacity of the motor, and the whole heat dissipation scheme There is no additional structural design that needs to be sealed, so it is highly reliable and easy to maintain; the cooling structure is designed at the end, and there is no need to increase the volume of the motor. It is also applicable to the formed motor and improves the power density.
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