基于滑移边界法的微型涡喷发动机用高速发电机优化设计

Optimization Design of High-Speed Generator for Micro Turbojet Engine Based on Slip Boundary Method

以微型涡喷发动机用高速永磁发电机为对象,进行电机优化设计研究。传统有限元仿真法在反电势和电感计算方面过于复杂,针对这一问题,将滑移边界法与有限元分析结合,提出一种基于滑移边界条件的电机有限元仿真模型。在此基础之上,将基于滑移边界有限元模型的电磁参数计算与梯度下降优化方法相结合,提出改进梯度优化算法,开展以发电机最小体积为优化目标的优化设计研究。基于上述优化结果设计了多台微型涡喷发动机用高速发电机样机,并通过对电机的电磁参数测试验证了所提方法的有效性。

The optimization design of high speed permanent magnet generator used in micro turbojet engine （MTE） is studied in this paper. The traditional finite element simulation method is too complex in the calculation of the back EMF and inductance. In order to solve this problem, a finite element simulation model of motor based on slip boundary condition is proposed by combining the slip boundary method with finite element analysis. On this basis, combining the calculation of electromagnetic parameters based on the slip boundary finite element model with the gradient descent optimization method, this paper proposes an improved gradient optimization algorithm, aiming at optimizing the design for the minimum volume of generator. Based on the above optimization results, several high speed generator prototypes for MTE are designed, and the validity of the proposed method is verified by testing their electromagnetic parameters.