基于计算流体力学的非晶合金轴向磁通永磁电机冷却系统设计

发布时间：2019-01-19 20:40

【摘要】：采用一种新型材料——非晶合金作为轴向磁通永磁(AFPM)电机的定子铁心。研制非晶合金和硅钢片两种材料的定子铁心,对其损耗特性进行对比,实验数据显示非晶合金替代常规硅钢片作为电机铁心,能够降低电机的铁耗,但是同时由于高频率的选择使得电机转子部分等损耗有所增加。为进一步提高非晶合金轴向磁通永磁电机冷却效率,优化电机设计保证电机的安全运行,对该类电机的冷却系统进行设计。研究四种冷却结构并建立相应的三维流体场数学模型和物理模型,基于计算流体力学(CFD)理论基础,通过有限体积法,在相同的计算条件、网格划分前提下,研究四种冷却结构的热特性和流动特性。优选出螺旋型结构并对其进行具体尺寸参数设计,最后对无隔水板和螺旋结构进行温升试验。试验结果表明,螺旋结构的绕组和转子冷却效率高出无隔水板结构33.1%和26.5%,为该类新型材料的永磁电机冷却结构设计及电磁方案优化提供了指导。
[Abstract]:A new material, amorphous alloy, is used as stator core of axial flux permanent magnet (AFPM) motor. The stator core of amorphous alloy and silicon steel sheet is developed, and the loss characteristics of the stator core are compared. The experimental data show that the amorphous alloy can reduce the iron loss of the motor by replacing the conventional silicon steel sheet as the motor iron core. But at the same time, due to the choice of high frequency, the loss of rotor part is increased. In order to further improve the cooling efficiency of the amorphous alloy axial flux permanent magnet motor and optimize the design of the motor to ensure the safe operation of the motor, the cooling system of this kind of motor is designed. Four cooling structures are studied and corresponding three-dimensional fluid field mathematical and physical models are established. Based on the (CFD) theory of computational fluid dynamics, the finite volume method is used under the same calculation conditions and mesh generation. The thermal and flow characteristics of four cooling structures are studied. The helical structure was selected and the specific dimension parameters were designed. Finally, the temperature rise test was carried out on the water-free plate and spiral structure. The experimental results show that the cooling efficiency of the winding and rotor of the spiral structure is 33.1% and 26.5% higher than that of the water-free plate structure, which provides guidance for the design of the cooling structure and the optimization of the electromagnetic scheme for the new type of permanent magnet motor.
【作者单位】：沈阳工业大学国家稀土永磁电机工程技术研究中心;西安航天精密机电研究所;河北电机股份有限公司;
【基金】：国家科技支撑计划(2013BAE08B00、2015BAF06B04) 国家自然科学基金(51307111)资助项目
【分类号】：TM351

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