摘要
针对高频高速工况下电-机械转换器动圈组件的空气阻尼问题,基于开孔对平板空气阻尼特性影响的理论分析,对电-机械转换器的绕线筒进行结构优化,并采用动网格技术对其运动空气阻尼特性进行CFD计算。结果表明,随着运动频率和速度的增大,动圈组件受到的空气阻尼几乎与速度的平方成正比。对绕线筒的端部开孔,可大大提高空气流通能力,改善其周围流场的速度和压力分布。相对于结构一,结构二和结构三的空气阻尼分别减小64.3%和97.1%,效果显著。高频高速工况下作用于电-机械转换器的空气阻尼,能够通过优化其内部结构而得到减小。
Aiming at the aerodynamics of an electromechanical converter under the conditions of high frequency and high speed,the bobbin structure was optimized based on the theoretical analysis of the air damping characteristics on perforated plate. Then a computational fluid dynamics analysis based on dynamic mesh technology was proposed to calculate the aerodynamics of three different bobbins. Results show that with the increase of the moving frequency and speed,the air damping of the coil subassembly is nearly proportional to the square of the speed. Punching holes on the end of the bobbin could greatly enhance the air flow capacity and improve the distribution of the pressure and velocity of the flow field around.Compared with proposal one,the air damping of proposal two and proposal three is decreased by 64. 3% and 97. 1% respectively. It can be seen that the air damping can be reduced by the structure optimization of the electromechanical converter at the high speed working conditions.
出处
《微特电机》
北大核心
2015年第7期16-20,共5页
Small & Special Electrical Machines
基金
国家自然科学基金项目(51307170)
深圳市基础研究项目(JCYJ2014091003939032)
关键词
电-机械转换器
空气动力学
高速
动网格
electromechanical converter
aerodynamics
high speed
dynamic mesh
