基于棱单元法计算爪极发电机负载特性

本文用四面体棱单元三维有限元方法计算一台28V,35A汽车用爪极发电机负载特性.用迭代的方法计算出发电机负载不同转速时的输出电流.棱单元有限元法比节点元有限元法对内存的需求少,计算时间少,因此适合计算爪极发电机负载特性.样机的实验结果与棱单元法计算结果的一致性验证了计算结果的正确性.本文对爪极发电机负载性能和参数的计算以及爪极发电机的优化设计具有一定的理论参考意义.

Edge element computation of load performance of claw-pole alternator

In this paper, calculation of load performance of a 28V, 35A claw-pole alternator is presented using three dimensional finite element method with tetrahedral edge elements. The output current of the alternator at different speed is computed by an iteration method. The magnetic field of the alternator is also computed using three dimensional finite element method with nodal elements. The comparison of two methods shows that the computation using the edge element method requires less memory and less time. So it is appropriate for computing load performance of the alternator. The calculated results are validated by the experimental results. The results of the paper are helpful to computation of load performance and parameters of the claw-pole alternator and to the optimal design of the alternator.