The new flux switching motor : a DC motor without brushes
This thesis is principally concerned with the theoretical modelling, design, manufacture, performance testing, and development of a new type of low-cost electronically-commutated doubly-salient wound-field brushless DC-motor, named the flux-switching motor. The drive-system that was designed, and developed, was specifically intended to be used in a low-power application (2.5 horsepower, less than 2 kW output-power), according to a given specification Extensive testing using four prototype motors has been carried out in attempting to satisfy the specification. From this testing empirical modelling techniques have been demonstrated to be of use in the design of such motors. The motor is showing excellent promise for the future, when it should become a realistic alternative to currently available motors on the market.