Calculation of Rated Load Voltage for Permanent Magnet Motor by Finite Element Method

In order to calculate the rated load voltage of direct-driven permanent magnet synchronous generator, two different finite element methods are used. First, a mathematical model of electromagnetic field and a field-circuit coupled model of transient electromagnetic field are established. And then transient electromagnetic field, which can better reflect the transient process of the permanent magnet generator at rated load, is simulated to obtain the stator winding voltage by Ansoft software. Finally, the simulation results are verified to be correct by load current iteration method. Lots of references have proved that the finite element method can effectively calculate the load voltage which can be applied to engineering practice and should be popularized.