基于磁路法与等效热网络法的航天永磁同步电机设计与仿真

Aerospace Permanent Magnetic Synchronous Motor Design and Simulation Based on Magnetic Circuit Method and Equivalent Thermal Network Method

针对航天永磁同步电机方案初步设计耗时长、过度依赖商业软件的问题,基于磁路法和热网络法,提出了一套方案设计阶段航天永磁同步电机磁热性能快速预估与仿真方法。给出了定子内径、定子外径、铁芯长度、匝数等关键参数的取值准则,建立了包含36个节点集总参数热网络模型,并以端部绕组为例给出了热平衡方程的详细推导过程。通过与成熟商业软件对比,其电磁计算最大误差出现在电流有效值上,偏差值为6.07%;与样机实测值对比,绕组温升最大误差为7.3%,满足方案设计阶段预示精度要求,为方案设计阶段航天永磁同步电机快速性能预估提供有力支撑。

A set of rapid prediction and simulation methods for the performance analysis of aerospace permanent magnet synchronous motor at the scheme design stage were developed based on the magnetic circuit method and equivalent thermal network method,aiming at the problem of long time-consuming and excessive dependence on commercial software.The key parameters such as stator inner diameter,stator outer diameter,core length,number of turns,etc.were introduced with emphasis.A lumped parameter thermal network model with 36 nodes was established,and the winding overhang thermal balance equation was conducted to explain the detailed derivation process.The maximum error in electromagnetic calculation was the current effective value,in which the deviation was 6.07%,compared with the mature commercial software.While the maximum error of the winding temperature deviation was 7.3%,compared with the measured value of the prototype.The proposed methods provided powerful support for the rapid perfor-mance prediction of aerospace permanent magnet synchronous motor at the scheme design stage,while the predictive accuracy satisfied the design requirements.