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The Analysis And Design Of Brushless Dc Motors, Steven Ronald Prina

Doctoral Dissertations

This work is concerned with the magnetic analysis of brushless DC motors, and, with the development of a method of designing brushless DC motors which have symmetric windings and rotors without any iron saliency. A two-dimensional nonlinear finite element magnetic model is used to analyze the magnetic behavior of the motor. Methods of using the finite element solution(s) to predict motor characteristic performance parameters, such as the torque-angle curve, detent torque-angle curve, torque constant, back emf constant and inductance are discussed in detail. It is shown that three-dimensional effects can make significant contributions to the motor inductance, making inductance prediction …