摘要
内置式永磁同步电机高速运转时,隔磁桥处承受着永磁体和极靴所产生的巨大离心力,为了提高转子冲片的机械强度避免隔磁桥的损坏有必要对电机转子冲片的结构进行研究。首先,基于离心力产生的原理建立了转子冲片最大应力的数学表达式并与有限元仿真模型比较,验证了其准确性。然后,针对现有转子冲片机械强度不足的缺陷,提出了对永磁体沿径向分段的结构优化方案,并对该方案进行了模拟仿真。结果表明:分段桥可有效分担隔磁桥处的应力,提高转子的机械强度。最后,对比分析了分段桥数量对电机机械强度及电气性能的影响,得出了实例电机转子冲片的最优结构。研究结果为高速内置式永磁电机转子结构的优化设计提供了有力参考。
The magnetic bridge of the high speed interior permanent magnet motor rotor sustain centrifugal force caused by permanent magnet material and pole shoe.In order to improve the mechanical strength of the rotor and avoid the damage of the magnetic bridge,it is necessary to study the structure of the motor rotor.First,the mathematical model of rotor stress was established based on the principle of centrifugal force and verified by finite element simulation software.Then,the permanent magnet was segmented in the radial direction.The simulation shows that the stress at the magnetic bridge was dispersed to the segmented bridge,which improved the mechanical strength of the rotor.Finally,the optimal structure of the rotor lamination was obtained by analyzing effects of segmented bridge number on the mechanical strength and electrical performance of the motor.It provides references for the design of high speed interior permanent magnet rotor.
作者
顾雪政
顾海勤
倪红军
吕帅帅
石启军
GU Xuezheng;GU Haiqin;NI Hongjun;LV Shuaishuai;SHI Qijun(Nantong University,Nantong Jiangsu 226019,China;Nantong College of Science and Technology,Nantong Jiangsu 226019,China)
出处
《微电机》
2022年第2期24-27,36,共5页
Micromotors
基金
国家自然科学基金(61601250)
江苏高校优势学科建设工程三期项目(苏政办发[2018]87号)
南通市应用研究项目(JC2019129)。
关键词
隔磁桥
分段桥
有限元仿真
机械强度
应力分析
magnetic bridge
segmented bridge
finite element simulation
mechanical strength
stress analysis
