Magnetic circuit modeling of the field regulated reluctance machine. Part II: saturation modeling and results

This paper explores and offers solutions for two causes of simulation instabilities which occur when modeling machines using magnetic circuits. An algorithm for dynamic simulation of electric machines based on the magnetic circuit model (MCM) developed in part I of this paper is augmented to include the ability to model magnetic saturation without numerical oscillations. The resulting MCM algorithm is implemented in a digital computer program which is well suited for both simulation of transients in nonsinusoidally wound machines such as a field regulated reluctance machine (FRRM), and for design. The model developed is verified using a laboratory prototype FRRM, power converter, and controller. Results of computer simulations using the magnetic circuit model agree well with experimental machine data