Evaluation of a hybrid finite element analysis package featuring dual air-gap elements

This paper discusses the evaluation of a hybrid finite element simulation package for permanent magnet electrical machines. The package uses traditional triangular elements as well as air-gap elements to facilitate movement of the rotor. The package is capable of simulating machines with two air-gaps using the air-gap element method. Two examples of machines that require this functionality is given and the performance and accuracy of the presented simulation package is benchmarked against commercially available finite element packages. From the examples it is illustrated that this hybrid finite element package can produce results that match the commercial packages´ results with similar or improved performance in terms of computational time. This performance advantage is critical for optimization purposes.