CN116760210A - Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles - Google Patents
Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles Download PDFInfo
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- CN116760210A CN116760210A CN202310738307.0A CN202310738307A CN116760210A CN 116760210 A CN116760210 A CN 116760210A CN 202310738307 A CN202310738307 A CN 202310738307A CN 116760210 A CN116760210 A CN 116760210A
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- cooling water
- water channel
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
技术领域Technical field
本发明涉及一种交错磁极复合励磁电机,具体涉及一种交错磁极复合励磁电机水冷结构。The invention relates to a staggered magnetic pole compound excitation motor, and in particular to a staggered magnetic pole compound excitation motor water-cooling structure.
背景技术Background technique
复合励磁电机相对于传统电励磁电机与永磁电机,同时具有效率较高,气隙磁场可调的优点,但是由于复合励磁电机是通过直流辅助励磁绕组给铁磁极充磁来调节气隙磁场,所以除了交流绕组外还需多一套直流绕组,降低其温升也是十分重要的。Compared with traditional electric excitation motors and permanent magnet motors, compound excitation motors have the advantages of higher efficiency and adjustable air gap magnetic field. However, because compound excitation motors use DC auxiliary excitation windings to magnetize ferromagnetic poles to adjust the air gap magnetic field, Therefore, in addition to the AC winding, an additional DC winding is required, and it is also very important to reduce its temperature rise.
目前复合励磁电机冷却结构中,传统水冷方式为在定子背轭外部加装水冷机座,励磁绕组以及定子铁心产生的热量通过定子导磁背轭传导进入水冷结构中,由冷却水带走,此方法冷却水与直流励磁绕组以及定子之间传热路径较长,热阻较大,效率偏低;或者在定子铁心中沿轴向开设孔洞,水冷管设置在孔洞中,此种结构需对定子铁心进行加工,而且若冷却水管采用热导率较高的金属材料也会对电机性能产生影响。In the current cooling structure of compound excitation motors, the traditional water-cooling method is to install a water-cooled machine base outside the stator back yoke. The heat generated by the field winding and the stator core is conducted through the stator magnetic back yoke into the water-cooling structure, and is taken away by the cooling water. This Method: The heat transfer path between the cooling water, the DC excitation winding and the stator is long, the thermal resistance is large, and the efficiency is low; or holes are opened along the axial direction in the stator core, and the water-cooling tube is placed in the hole. This structure requires the stator to be The iron core is processed, and if the cooling water pipe is made of metal materials with high thermal conductivity, it will also affect the performance of the motor.
为了解决复合励磁电机中交流主绕组和辅助励磁绕组散热效率不高的难题,以及有效降低电机定子与直流辅助励磁绕组温升,需要设计一种新型冷却结构。In order to solve the problem of low heat dissipation efficiency of the AC main winding and auxiliary excitation winding in the compound excitation motor, and to effectively reduce the temperature rise of the motor stator and DC auxiliary excitation winding, a new cooling structure needs to be designed.
发明内容Contents of the invention
针对现有复合励磁电机直流励磁绕组冷却困难,本发明提出一种用于降低交错磁极复合励磁电机温升的冷却结构,该冷却结构提出在定子轭部和定子导磁背轭交界处安装冷却水管,冷却水管在定子断开部分有下凹,励磁绕组安装在冷却水道下凹处,此结构既可以方便励磁绕组的安装,也可以对励磁绕组和电机定子铁心进行直接冷却。In view of the difficulty in cooling the DC excitation winding of the existing compound excitation motor, the present invention proposes a cooling structure for reducing the temperature rise of the staggered pole compound excitation motor. This cooling structure proposes to install a cooling water pipe at the junction of the stator yoke and the stator magnetic back yoke. , the cooling water pipe has a recess in the disconnected part of the stator, and the field winding is installed in the recess of the cooling water channel. This structure can not only facilitate the installation of the field winding, but also directly cool the field winding and the motor stator core.
为实现上述目的,本发明的技术方案是:In order to achieve the above objects, the technical solution of the present invention is:
一种用于降低交错磁极复合励磁电机温升的冷却结构,包括冷却水道、两段定子、直流励磁绕组,所述的直流励磁绕组沿周向缠绕在两段定子断开部分的冷却水道下凹处;实现冷却水道与两段定子以及直流励磁绕组的直接接触,用于降低冷却水与直流励磁绕组以及两段定子之间的接触热阻。A cooling structure for reducing the temperature rise of a staggered pole composite excitation motor, including a cooling water channel, a two-section stator, and a DC excitation winding. The DC excitation winding is circumferentially wound around the recessed cooling water channel in the disconnected part of the two-section stator. to achieve direct contact between the cooling water channel and the two stator sections and the DC excitation winding, which is used to reduce the contact thermal resistance between the cooling water, the DC excitation winding and the two stator sections.
进一步,所述两段定子包含定子铁芯和电枢绕组,由叠压的硅钢片和嵌装铜线绕组制成。Furthermore, the two-section stator includes a stator core and an armature winding, which are made of laminated silicon steel sheets and embedded copper wire windings.
进一步,所述两段定子在中间位置断开,其共轭部设有冷却水道槽。Furthermore, the two stator sections are disconnected at the middle position, and their conjugate parts are provided with cooling water channels.
进一步,所述冷却水道从两段定子外侧插入,通过两段定子轭部冷却水道槽与冷却水道固定。Furthermore, the cooling water channel is inserted from the outside of the two-stage stator, and is fixed to the cooling water channel through the two-stage stator yoke cooling water channel grooves.
进一步,所述冷却水道外圆热套定子导磁背轭,起轴向导磁作用。Furthermore, the outer circle of the cooling water channel is thermally sleeved with a magnetic conductive back yoke of the stator, which plays an axial magnetic conductive role.
进一步,所述冷却水道包含与两段定子铁芯圆弧槽相同数量的圆形水道、两端集水环、进出水管和两端定子断开位置下凹的水道。Furthermore, the cooling water channel includes the same number of circular water channels as the arc grooves of the two sections of the stator core, water collection rings at both ends, water inlet and outlet pipes, and water channels with concave stator disconnection positions at both ends.
进一步,所述冷却水道为螺旋水道或圆形水道。Further, the cooling water channel is a spiral water channel or a circular water channel.
本发明的有益效果是:The beneficial effects of the present invention are:
本发明通过将励磁绕组放置在冷却水管上,实现冷却水管与定子以及励磁绕组的直接接触,降低了冷却水与励磁绕组以及定子之间的接触热阻,冷却效果较好,散热效率更高,并且其安装在定子轭部与导磁背轭交界处,距离交变磁场较远,即便采用金属材料,也对电机性能影响较小。By placing the excitation winding on the cooling water pipe, the present invention realizes direct contact between the cooling water pipe, the stator and the excitation winding, reduces the contact thermal resistance between the cooling water, the excitation winding and the stator, has better cooling effect and higher heat dissipation efficiency. And it is installed at the junction of the stator yoke and the magnetic back yoke, which is far away from the alternating magnetic field. Even if it is made of metal material, it will have little impact on the performance of the motor.
附图说明Description of the drawings
图1为电机定子、水道与直流励磁绕组安装图;Figure 1 shows the installation diagram of the motor stator, water channel and DC excitation winding;
图2为定子、冷却水道与定子导磁背轭安装图;Figure 2 shows the installation diagram of the stator, cooling water channel and stator magnetic back yoke;
图3为冷却水道主视图;Figure 3 is the front view of the cooling water channel;
图4为冷却水道侧视图;Figure 4 is a side view of the cooling water channel;
图5为冷却水道总体流向示意图;Figure 5 is a schematic diagram of the overall flow direction of the cooling water channel;
图6为冷却水道轴向流动示意图;Figure 6 is a schematic diagram of the axial flow of the cooling water channel;
图中:1为冷却水道;2为直流励磁绕组;3为分段定子一;4为分段定子二;5为定子导磁背轭。In the figure: 1 is the cooling water channel; 2 is the DC excitation winding; 3 is the segmented stator one; 4 is the segmented stator two; 5 is the stator magnetic back yoke.
具体实施方式Detailed ways
下面结合附图与实施例对本发明作进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and examples.
如图1至图6所示,本发明的一种用于降低交错磁极复合励磁电机温升的冷却结构,包括冷却水道1、两段定子、直流励磁绕组2等。两段定子中间位置完全断开形成分段定子一3和分段定子二4,在两段定子铁芯外圆布置足够数量的定子轭部冷却水道槽。分段定子一3和分段定子二4均包含定子铁芯和电枢绕组,两段定子均通过硅钢片叠压,并由嵌装铜线绕组制成。冷却水道1包含与定子铁芯圆弧槽相同数量的圆形水道、两端集水环、进出水管和定子断开位置下凹的水道。冷却水道1从两段定子外侧插入,通过定子轭部冷却水道槽保证两者完全固定;直流励磁绕组2沿周向缠绕在定子断开部分即冷却水道下凹处;定子导磁背轭5热套于冷却水道1外圆,起轴向导磁作用。As shown in Figures 1 to 6, the cooling structure of the present invention for reducing the temperature rise of a staggered pole compound excitation motor includes a cooling water channel 1, a two-section stator, a DC excitation winding 2, etc. The two stator sections are completely disconnected at the middle position to form segmented stator one 3 and segmented stator two 4. A sufficient number of stator yoke cooling water channels are arranged on the outer circumference of the two stator cores. Segmented stator one 3 and segmented stator two 4 both include stator cores and armature windings. Both stators are laminated by silicon steel sheets and made of embedded copper wire windings. The cooling water channel 1 includes the same number of circular water channels as the arc grooves of the stator core, water collection rings at both ends, water inlet and outlet pipes, and water channels that are concave at the stator disconnection position. The cooling water channel 1 is inserted from the outside of the two sections of the stator, and the cooling water channel slots in the stator yoke ensure that the two are completely fixed; the DC excitation winding 2 is wound circumferentially around the disconnected part of the stator, which is the recess of the cooling water channel; the magnetically conductive back yoke 5 of the stator is heated It is placed on the outer circle of the cooling water channel 1 and plays the role of axial magnetization.
优选地,分段定子一3、分段定子二4、直流辅助励磁绕组2和定子导磁背轭5均可通过电机优化设计方法进行优化设计,以达到最佳的额定工作效率、合适的调压范围和最小的体积重量。Preferably, the segmented stator one 3, the segmented stator two 4, the DC auxiliary excitation winding 2 and the stator magnetic back yoke 5 can be optimized and designed through the motor optimization design method to achieve the best rated operating efficiency and appropriate adjustment. pressure range and minimum volume weight.
优选地,冷却水道1根据电机工作温度和加工工艺性选择合适的水道形式,如螺旋水道和圆形水道等,其具体尺寸参数可通过优化设计使得电机的散热效果达到最佳以保证电机工作在安全温度范围内。Preferably, the cooling water channel 1 selects an appropriate water channel form according to the motor operating temperature and processing technology, such as spiral water channels and circular water channels. Its specific size parameters can be optimized through design to optimize the heat dissipation effect of the motor to ensure that the motor works at within safe temperature range.
本发明的新型冷却结构,将冷却水道固定,分段定子一3和分段定子二4其轭部开有冷却水道槽,分段定子一3和分段定子二4中间位置完全断开,分别为两段定子,冷却水道在定子断开部分下凹,冷却水道1从轴向两端外侧插入分段定子一3和分段定子二4,通过定子轭部冷却水道槽与冷却水道固定。直流励磁绕组2沿周向缠绕在定子断开部分即冷却水道下凹处。当复合励磁电机运行时,直流辅助励磁绕组中通入电流调节气隙磁场,产生损耗,定子中同样产生损耗,其产生的热量将通过直接接触的冷却水管中流动的冷却水带走,如图5、图6所示。The novel cooling structure of the present invention fixes the cooling water channel. The segmented stator 3 and the segmented stator 2 4 have cooling water channel grooves in their yoke parts. The segmented stator 3 and the segmented stator 2 4 are completely disconnected in the middle position, respectively. It is a two-section stator, and the cooling water channel is concave in the disconnected part of the stator. The cooling water channel 1 is inserted into the segmented stator 1 3 and the segmented stator 2 4 from the outside of both axial ends, and is fixed to the cooling water channel through the cooling water channel groove of the stator yoke. The DC excitation winding 2 is wound around the disconnected part of the stator, that is, the recess of the cooling water channel in the circumferential direction. When the compound excitation motor is running, current flows into the DC auxiliary excitation winding to adjust the air gap magnetic field, resulting in losses. Loss also occurs in the stator, and the heat generated will be taken away by the cooling water flowing in the cooling water pipe in direct contact, as shown in the figure 5. As shown in Figure 6.
Claims (7)
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101291098A (en) * | 2008-05-05 | 2008-10-22 | 哈尔滨工业大学 | Hybrid Excitation Compensation Pulse Generator |
CN111969791A (en) * | 2020-08-18 | 2020-11-20 | 中国第一汽车股份有限公司 | Oil-water mixed cooling motor system and vehicle |
WO2023095405A1 (en) * | 2021-11-24 | 2023-06-01 | 株式会社明電舎 | Rotating electrical machine |
CN220401502U (en) * | 2023-06-20 | 2024-01-26 | 中国船舶集团有限公司第七〇四研究所 | Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles |
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2023
- 2023-06-20 CN CN202310738307.0A patent/CN116760210A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101291098A (en) * | 2008-05-05 | 2008-10-22 | 哈尔滨工业大学 | Hybrid Excitation Compensation Pulse Generator |
CN111969791A (en) * | 2020-08-18 | 2020-11-20 | 中国第一汽车股份有限公司 | Oil-water mixed cooling motor system and vehicle |
WO2023095405A1 (en) * | 2021-11-24 | 2023-06-01 | 株式会社明電舎 | Rotating electrical machine |
CN220401502U (en) * | 2023-06-20 | 2024-01-26 | 中国船舶集团有限公司第七〇四研究所 | Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles |
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