WO2009006777A1 - A cooling fan structure in permanent-magnetic electric machine - Google Patents
A cooling fan structure in permanent-magnetic electric machine Download PDFInfo
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- WO2009006777A1 WO2009006777A1 PCT/CN2008/000768 CN2008000768W WO2009006777A1 WO 2009006777 A1 WO2009006777 A1 WO 2009006777A1 CN 2008000768 W CN2008000768 W CN 2008000768W WO 2009006777 A1 WO2009006777 A1 WO 2009006777A1
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- rotor
- permanent magnet
- generator
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- fan structure
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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
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Definitions
- the present invention relates to a cooling fan structure for a permanent magnet generator, and more particularly to a cooling fan structure of a novel high power permanent magnet generator.
- the permanent magnet generator When the permanent magnet generator is working, due to the impedance of its stator coil, heat will be emitted when the current passes, and the temperature inside the motor body is high, especially the current high-power diesel digital generator set, which is equipped with a permanent magnet generator. Due to the miniaturization of the shape, there is generally no cooling fan, but the air is freely circulated through the chassis to cool the generator, so that the unit cannot run continuously for a long time. Since there is no direct cooling of the generator, the heat generated by the stator coils cannot be quickly discharged, so that the temperature of the rotor with the permanent magnets rises rapidly. For the permanent magnet generator, the influence factor of the permanent magnet performance is determined by the priming temperature. Therefore, in order to make the permanent magnet performance stable and reduce the irreversible change, the temperature control is a problem to be solved.
- sintered NdFeB has a large magnetic energy product and intrinsic coercive force, it is widely used in high-power permanent magnet generators, but sintered NdFeB Residual magnetic induction temperature coefficient of magnet (-0.08%/°C ⁇ -0.13%/°C) and temperature coefficient of intrinsic coercivity
- the object of the present invention is to overcome the above-mentioned deficiencies, thereby providing a cooling fan structure of a permanent magnet generator, which drives the blades to rotate by the rotation of the rotor, generates cooling air to force cooling of the permanent magnet generator, and greatly improves the permanent magnet.
- the cooling effect of the generator stator coil and the permanent magnet rotor core ensures the continuous operation reliability of the permanent magnet generator.
- the invention comprises a generator rotor, characterized in that a wind blade ring and a pressure ring are mounted on the rotor of the generator, the wind
- the leaf ring and the pressing ring are integrally connected with the rotor core, and a permanent magnet is installed in the rotor core, and the upper blade of the blade ring and the rotor core with the permanent magnet are respectively disposed on both sides of the bottom plate of the blade ring.
- the heat dissipation in the cavity is facilitated, and the exhaust hole of the engine flywheel housing of the generator is installed on the radial outer circular surface, and the ventilation hole of the generator rotor Form a cooling duct.
- the bottom plate is provided with two or more fan blades.
- the bottom plate is provided with two or more mounting holes.
- the bottom plate is made of a low magnetic permeability material.
- the other end of the fan blade on the blade ring connected to the bottom plate may be connected by a circular plate.
- the invention adopts a self-contained centrifugal air blade ring provided on the rotor of the generator, and sucks cold air from the vent hole of the rotor to directly air-cool the generator rotor core and the stator coil, maintains a smooth air flow, and reduces the heat of the stator.
- the heat conduction of the permanent magnet on the rotor while taking away the heat that has been conducted to the rotor, has a good air-cooling effect, and ensures the continuous working reliability of the permanent magnet generator; since the bottom ring of the wind blade is made of a material with low magnetic permeability , the permanent magnet of the rotor acts as a magnetic barrier, which improves the power generation efficiency of the generator.
- FIG. 1 is a schematic view showing the structure of a wind blade provided on a bottom plate of the present invention.
- FIG. 2 is a schematic exploded view of the permanent magnet generator rotor of the present invention.
- FIG 3 is a schematic view of a permanent magnet generator rotor assembly of the present invention.
- FIG. 4 is a schematic view of the permanent magnet generator assembly of the present invention.
- the invention mainly consists of a wind blade ring 1, a pressure ring 2, a permanent magnet 3, a rotor core 4, a generator rotor 5, a generator stator 6, a bottom plate 7, a fan blade 8 and a mounting hole 9.
- the present invention adopts a vent hole on the generator rotor 5, and the rotor ring 5 and the pressure ring 2 are mounted on the generator rotor 5, and the wind blade ring 1 and the pressure ring 2 are bolted.
- the rotor core 4 is integrally connected with the rotor core 4, and the permanent magnet 3 is mounted on the protective rotor core 4.
- the rotor core 1 and the rotor core 4 with the permanent magnet 3 are respectively disposed on both sides of the bottom plate 7, and the fan blades 8 on the fan ring ring are
- the other end of the connection between the bottom plates 7 may be connected by a circular plate.
- the air ring 1 and the bottom plate 7 can be connected by a circular plate.
- a plurality of fan blades 8 are disposed on the air blade ring bottom plate 7.
- the bottom plate 7 is provided with a plurality of mounting holes 9.
- the bottom plate 7 is made of a low magnetic permeability material.
- a centrifugal fan is formed by the rotation of the generator rotor.
- a cavity is formed between the generator rotor 5 and the engine flywheel housing. In order to accelerate the gas flow in the cavity formed by the engine flywheel housing and the generator, the heat dissipation in the cavity is facilitated, and the radial outer surface of the engine flywheel housing is opened.
- the venting hole forms a cooling duct with the venting hole of the generator rotor.
- the engine and generator stator inside the body are two main heat-generating components. During the operation, they generate a large amount of heat. If the cooling cannot be performed effectively, it will inevitably affect the normal operation of the permanent magnet generator. Operation, in the present invention, the engine flywheel housing and the generator stator are cooled by air cooling, and a smooth cooling air passage is formed inside the body.
- the rotor of the generator is driven by the rotation of the crankshaft of the engine, so that the wind pressure is formed in the cavity between the rotor of the generator and the flywheel casing of the engine due to the rotation of the upper rotor ring of the generator rotor. Air enters the low-pressure zone in the cavity through the vent hole on the rotor of the generator.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
一种永磁发电机的冷却风扇结构 技术领域 Cooling fan structure of permanent magnet generator
本发明涉及一种永磁发电机的冷却风扇结构， 尤其是新型大功率永磁发 电机的冷却风扇结构。 The present invention relates to a cooling fan structure for a permanent magnet generator, and more particularly to a cooling fan structure of a novel high power permanent magnet generator.
背景技术 Background technique
永磁发电机在工作时， 由于其定子线圈的阻抗， 电流通过时会有热量发 出， 电机体内部的温度较高， 特别是目前大功率柴油数码发电机组， 其所配 置的永磁发电机， 由于力求外形的小型化， 一般不带冷却风扇， 只是通过机 箱内的空气自由流通来冷却发电机， 这样机组不能长时间连续运行。 由于没 有对发电机的的直接冷却， 定子线圈产生的热量不能被很快的排出， 致使装 有永磁体的转子温度也很快上升。 对于永磁发电机， 决定永磁体性能的影响 因素首推温度， 所以为使永磁体在应用时性能比较稳定、 减少不可逆变化， 温度的控制是一个需待解决的问题。 When the permanent magnet generator is working, due to the impedance of its stator coil, heat will be emitted when the current passes, and the temperature inside the motor body is high, especially the current high-power diesel digital generator set, which is equipped with a permanent magnet generator. Due to the miniaturization of the shape, there is generally no cooling fan, but the air is freely circulated through the chassis to cool the generator, so that the unit cannot run continuously for a long time. Since there is no direct cooling of the generator, the heat generated by the stator coils cannot be quickly discharged, so that the temperature of the rotor with the permanent magnets rises rapidly. For the permanent magnet generator, the influence factor of the permanent magnet performance is determined by the priming temperature. Therefore, in order to make the permanent magnet performance stable and reduce the irreversible change, the temperature control is a problem to be solved.
在目前用于发电机的稀土永磁材料中， 由于烧结钕铁硼具有很大的磁能 积和内禀矫顽力， 所以被广泛采用于大功率永磁发电机中， 但烧结钕铁硼永 磁体的剩磁感应温度系数（为 -0.08%/°C〜- 0.13%/°C )和内禀矫顽力温度系数 In the rare earth permanent magnet materials currently used for generators, since sintered NdFeB has a large magnetic energy product and intrinsic coercive force, it is widely used in high-power permanent magnet generators, but sintered NdFeB Residual magnetic induction temperature coefficient of magnet (-0.08%/°C~-0.13%/°C) and temperature coefficient of intrinsic coercivity
(为 -0.5%/°C〜- 0.65%/°C ) 相对其它永磁体比较大， 故温度稳定性比较差， 烧结钕铁硼的稳定工作温度一般在 140°C左右。 当电机的温度接近或超过这 个温度时， 电机中的永磁体易产生热退磁， 而且这种退磁有很大一部分是不 可逆的， 这样就产生常见的永磁电机的功率下降、 性能降低； 另一方面， 定 子线圈的温度过高， 易使绝缘严重老化， 大大降低了电机的使用寿命。 由于 这两方面的因素， 进而影响整个机组的整体性能。 (-0.5%/°C~-0.65%/°C) Relatively large compared with other permanent magnets, the temperature stability is relatively poor, and the stable working temperature of sintered NdFeB is generally around 140 °C. When the temperature of the motor approaches or exceeds this temperature, the permanent magnet in the motor is prone to thermal demagnetization, and a large part of this demagnetization is irreversible, which results in a power drop and performance degradation of the common permanent magnet motor; On the other hand, the temperature of the stator coil is too high, which causes the insulation to deteriorate seriously, which greatly reduces the service life of the motor. Due to these two factors, it affects the overall performance of the entire unit.
发明内容 Summary of the invention
本发明的目的在于克服上述不足之处， 从而提供一种永磁发电机的冷却 风扇结构， 通过转子的旋转带动风叶旋转， 产生冷却风来强制对永磁发电机 的冷却， 大大提高永磁发电机定子线圈与永磁体转子铁芯的冷却效果， 保证 永磁发电机的持续工作可靠性。 The object of the present invention is to overcome the above-mentioned deficiencies, thereby providing a cooling fan structure of a permanent magnet generator, which drives the blades to rotate by the rotation of the rotor, generates cooling air to force cooling of the permanent magnet generator, and greatly improves the permanent magnet. The cooling effect of the generator stator coil and the permanent magnet rotor core ensures the continuous operation reliability of the permanent magnet generator.
本发明的主要解决方案是这样实现的： The main solution of the invention is achieved in this way:
本发明包括发电机转子， 特征是在发电机转子上安装风叶环与压圈， 风 The invention comprises a generator rotor, characterized in that a wind blade ring and a pressure ring are mounted on the rotor of the generator, the wind
1 1
替换页（细则第 26条) 叶环、 压圈与转子铁心连接成一体， 在转子铁心内安装永磁体， 风叶环上风 叶片与装有永磁体的转子铁心分别设在风叶环底板的两面。 Replacement page (Article 26) The leaf ring and the pressing ring are integrally connected with the rotor core, and a permanent magnet is installed in the rotor core, and the upper blade of the blade ring and the rotor core with the permanent magnet are respectively disposed on both sides of the bottom plate of the blade ring.
为了加速发动机飞轮壳与发电机形成的空腔内气体流动， 便于腔内热量 的畅通排出， 安装发电机的发动机飞轮壳径向外圆面上开有排风孔， 与发电 机转子的通风孔形成一个冷却风道。 In order to accelerate the gas flow in the cavity formed by the engine flywheel housing and the generator, the heat dissipation in the cavity is facilitated, and the exhaust hole of the engine flywheel housing of the generator is installed on the radial outer circular surface, and the ventilation hole of the generator rotor Form a cooling duct.
所述的底板上设有二片或二片以上的风扇叶片。 The bottom plate is provided with two or more fan blades.
所述的底板上设有二个或二个以上的安装孔。 The bottom plate is provided with two or more mounting holes.
所述的底板由低磁导率材料制成。 The bottom plate is made of a low magnetic permeability material.
所述的风叶环上的风叶与底板间连接的另一端可以用圆环形的板相连 接。 The other end of the fan blade on the blade ring connected to the bottom plate may be connected by a circular plate.
本发明与已有技术相比具有以下优点： The present invention has the following advantages over the prior art:
本发明通过发电机转子上设置的自带离心风叶环， 从转子的通风孔吸入 冷空气对发电机转子铁芯、和定子线圈进行直接风冷，保持畅快的空气流动， 减小定子的热量对转子上永磁体的热传导，同时将己传导至转子的热量带走， 具有良好的风冷效果， 保证永磁发电机的持续工作可靠性； 由于风叶环底板 由低磁导率材料制成， 对转子的永磁铁起到了阻磁作用， 提高了发电机的发 电效率。 The invention adopts a self-contained centrifugal air blade ring provided on the rotor of the generator, and sucks cold air from the vent hole of the rotor to directly air-cool the generator rotor core and the stator coil, maintains a smooth air flow, and reduces the heat of the stator. The heat conduction of the permanent magnet on the rotor, while taking away the heat that has been conducted to the rotor, has a good air-cooling effect, and ensures the continuous working reliability of the permanent magnet generator; since the bottom ring of the wind blade is made of a material with low magnetic permeability , the permanent magnet of the rotor acts as a magnetic barrier, which improves the power generation efficiency of the generator.
附图说明 DRAWINGS
图 1是本发明底板上设置的风叶片结构示意图。 1 is a schematic view showing the structure of a wind blade provided on a bottom plate of the present invention.
图 2是本发明的永磁发电机转子结构分解示意图。 2 is a schematic exploded view of the permanent magnet generator rotor of the present invention.
图 3是本发明的永磁发电机转子总成示意图。 3 is a schematic view of a permanent magnet generator rotor assembly of the present invention.
图 4是本发明的永磁发电机总成示意图。 4 is a schematic view of the permanent magnet generator assembly of the present invention.
具体实施方式 detailed description
下面本发明将结合附图中的实施例作进一步描述： The invention will be further described below in conjunction with the embodiments of the drawings:
本发明主要由风叶环 1、 压圈 2、 永磁体 3、 转子铁心 4、 发电机转子 5、 发电机定子 6、 底板 7、 风扇叶片 8及安装孔 9等组成。 The invention mainly consists of a wind blade ring 1, a pressure ring 2, a permanent magnet 3, a rotor core 4, a generator rotor 5, a generator stator 6, a bottom plate 7, a fan blade 8 and a mounting hole 9.
如图 1、 图 2所示： 本发明采用在发电机转子 5上开有通风孔， 发电机 转子 5上安装有风叶环 1与压圈 2，通过螺栓把风叶环 1、压圈 2与转子铁心 4连接成一体， 保护转子铁心 4上安装有永磁体 3， 风叶环 1与装有永磁体 3 的转子铁心 4分别设在底板 7的两面， 风叶环上的风扇叶片 8与底板 7间连 接的另一端可以用圆环形的板相连接。 风叶环 1与底板 7间可以用圆环形的板相连接。 为了加速机体内气流的 流动， 更便于发电机内热空气的排出， 在风叶环底板 7上设置有若干片风扇 叶片 8。 所述的底板 7上设有若干个安装孔 9。 底板 7由低磁导率材料制成。 通过发电机转子的旋转， 形成一个离心式风扇。 发电机转子 5与发动机飞轮 壳间形成一个空腔，为了加速发动机飞轮壳与发电机形成的空腔内气体流动， 便于腔内热量的畅通排出， 在发动机飞轮壳径向外圆面上开有排风孔， 与发 电机转子的通风孔形成一个冷却风道。 As shown in FIG. 1 and FIG. 2, the present invention adopts a vent hole on the generator rotor 5, and the rotor ring 5 and the pressure ring 2 are mounted on the generator rotor 5, and the wind blade ring 1 and the pressure ring 2 are bolted. The rotor core 4 is integrally connected with the rotor core 4, and the permanent magnet 3 is mounted on the protective rotor core 4. The rotor core 1 and the rotor core 4 with the permanent magnet 3 are respectively disposed on both sides of the bottom plate 7, and the fan blades 8 on the fan ring ring are The other end of the connection between the bottom plates 7 may be connected by a circular plate. The air ring 1 and the bottom plate 7 can be connected by a circular plate. In order to accelerate the flow of the airflow in the air body, it is more convenient to discharge the hot air in the generator, and a plurality of fan blades 8 are disposed on the air blade ring bottom plate 7. The bottom plate 7 is provided with a plurality of mounting holes 9. The bottom plate 7 is made of a low magnetic permeability material. A centrifugal fan is formed by the rotation of the generator rotor. A cavity is formed between the generator rotor 5 and the engine flywheel housing. In order to accelerate the gas flow in the cavity formed by the engine flywheel housing and the generator, the heat dissipation in the cavity is facilitated, and the radial outer surface of the engine flywheel housing is opened. The venting hole forms a cooling duct with the venting hole of the generator rotor.
在该发电机组中， 机体内部的发动机和发电机定子为两个主要的发热部 件， 在工作过程中， 它们会产生大量的热量， 如不能进行有效的冷却， 势必 会影响永磁发电机的正常工作， 在本发明所述中， 采用风冷的方式对发动机 飞轮壳和发电机定子进行冷却， 在机体内部形成一个畅通的冷却风道。 In the generator set, the engine and generator stator inside the body are two main heat-generating components. During the operation, they generate a large amount of heat. If the cooling cannot be performed effectively, it will inevitably affect the normal operation of the permanent magnet generator. Operation, in the present invention, the engine flywheel housing and the generator stator are cooled by air cooling, and a smooth cooling air passage is formed inside the body.
本发明的工作原理及工作过程： The working principle and working process of the invention:
如图 3、 图 4所示： 通过发动机曲轴的旋转， 带动发电机转子， 从而由 于发电机转子上风叶环的旋转， 在发电机转子与发动机飞轮壳间的空腔中， 形成风压， 冷空气通过发电机转子上的通风孔进入空腔内的低压区， 通过风 叶环的旋转， 在风叶环径向外围形成高压区， 强迫空气从发动机飞轮壳的排 风孔和发电机定子与发动机飞轮壳间的通风间隙中向外排除， 带走了发动机 传给发动机飞轮壳与发电机定子自身产生的热量， 达到冷却效果， 限制了发 电机转子温度的上升， 从而保证了发电机的温度上升。 As shown in Fig. 3 and Fig. 4: The rotor of the generator is driven by the rotation of the crankshaft of the engine, so that the wind pressure is formed in the cavity between the rotor of the generator and the flywheel casing of the engine due to the rotation of the upper rotor ring of the generator rotor. Air enters the low-pressure zone in the cavity through the vent hole on the rotor of the generator. Through the rotation of the blade ring, a high-pressure zone is formed on the radial periphery of the blade ring, forcing air from the exhaust hole of the engine flywheel casing and the generator stator and The ventilation gap between the engine flywheel housings is removed outwards, taking away the heat generated by the engine to the engine flywheel housing and the generator stator itself, achieving the cooling effect, limiting the rise of the generator rotor temperature, thereby ensuring the temperature of the generator. rise.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100237820A CN101127468A (en) | 2007-07-11 | 2007-07-11 | A cooling fan structure for permanent magnetic generator |
| CN200710023782.0 | 2007-07-11 |
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| Publication Number | Publication Date |
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| WO2009006777A1 true WO2009006777A1 (en) | 2009-01-15 |
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| PCT/CN2008/000768 Ceased WO2009006777A1 (en) | 2007-07-11 | 2008-04-15 | A cooling fan structure in permanent-magnetic electric machine |
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| CN (1) | CN101127468A (en) |
| WO (1) | WO2009006777A1 (en) |
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- 2007-07-11 CN CNA2007100237820A patent/CN101127468A/en active Pending
-
2008
- 2008-04-15 WO PCT/CN2008/000768 patent/WO2009006777A1/en not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000217321A (en) * | 1999-01-25 | 2000-08-04 | Kokusan Denki Co Ltd | Outer rotor-type magnet generator |
| US6278207B1 (en) * | 1999-12-24 | 2001-08-21 | Minebea Co., Ltd. | Blower |
| CN2414234Y (en) * | 2000-03-22 | 2001-01-10 | 台达电子工业股份有限公司 | Composite fan blades |
| US20020053838A1 (en) * | 2000-05-30 | 2002-05-09 | Kazuma Okuda | Outer rotor type motor / generator |
| US20020179069A1 (en) * | 2001-05-29 | 2002-12-05 | Tatsuo Kobayashi | Flywheel magneto generator |
| CN2836326Y (en) * | 2003-06-17 | 2006-11-08 | 布莱克和戴克公司 | Generator with dual-pass airflow cooling device and method thereof |
| CN1627892A (en) * | 2003-09-16 | 2005-06-15 | 索尼株式会社 | Cooling apparatus and electronic equipment |
| WO2006120109A1 (en) * | 2005-05-10 | 2006-11-16 | Siemens Vdo Automotive Ag | Electric machine |
| WO2007085125A1 (en) * | 2006-01-26 | 2007-08-02 | Hangao Zhao | A combined fan with axial-flow and transverse-flow blades |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2525143A (en) * | 2014-01-06 | 2015-10-21 | Spinetic Energy Ltd | A generator |
| GB2525143B (en) * | 2014-01-06 | 2020-06-24 | Spinetic Energy Ltd | A generator |
| CN106100290A (en) * | 2016-08-17 | 2016-11-09 | 株洲百创节能科技有限责任公司 | Permanent magnetic coupling whirlwind cooling structure |
| CN109980892A (en) * | 2019-04-13 | 2019-07-05 | 宿州迅驰电子科技有限公司 | A kind of voice coil motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101127468A (en) | 2008-02-20 |
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