Finite-element analysis for design of classical and electronically operated machines

A method for analysis of magnetic fields in electrical machines is developed. A modular approach is developed to analyze the effects of machine geometry on machine performance and to solve for the magnetic field for any set of winding excitation currents as well as for any relative stator to rotor angular position. This generalized finite element approach is applied to the calculation of various machine parameters and performance characteristics. These parameters include a rigorous calculation of the saturated values of machine inductances, core losses, flux density waveforms throughout the magnetic circuit, induced EMF's and flux distributions under various load conditions. These parameters are key elements in the dynamic simulation of such machine systems. The advantage of this generalized machine modeling is the ability to predict accurately machine performance characteristics during design stages using the digital computer.