Development of the consequent pole permanent magnet machine

In this thesis operating principles, electromagnetic design and design considerations of the Consequent Pole Permanent Magnet (CPPM) machine are presented. Because of their particular configuration, these machines allows for a wide range of control of the airgap flux with minimum field Ampere-Turns requirements and without brushes or slip rings. Two components of the field flux are produced. One, which is almost constant, is produced by the permanent magnet located on the rotor surface. The other flux component, which is variable, is produced by a field winding positioned circumferentially in the center of the stator. These two flux components converge in the airgap. The excitation level of the machine is manipulated by controlling the DC field current.; Several design tools were used to investigate the characteristic of this type of PM machine. Simplified model is derived for machine design purposes. Optimization and sizing analysis is explored and numerical analysis is performed to predict the behavior of a prototype.; An experimental alternator have been fabricated to verify the flux control capability using this topology. Theoretical and experimental result demonstrate that the control principle works controlling the airgap flux. Variation on the field source configuration that increases the performance are proposed as a future work.