基于有限元法的水冷式永磁同步发电机DQ轴电感计算

摘要

In terms of the water-cooled permanent magnet synchronous generator, the accurate computation of the inductance of dq axis is important to compute the torque of the motor, analyse the ability of flux weakening and design the control system. In this paper, the static field method and the frozen permeability method are applied to obtain the inductance value of dq axis. The results show that the model and the computing methods are valid.%对于水冷式永磁同步发电机而言，其DQ轴电感的准确计算不仅对其转矩的准确计算及弱磁能力的准确判断有较大的影响，而且对其控制系统的设计也有较大的影响。为此，采用静态场法和冻结磁导率法对水冷式永磁同步发电机的DQ轴电感进行计算，并对两种方法计算结果进行比较。结果表明，两种方法计算所得DQ轴电感值差异很小，验证了所建模型及计算方法的正确性。