Analysis of an axial PM flux machine with field weakening capability for engine integration

With the development of new forms of vehicle drive systems and the interest of low fuel consumption, there is an increasing need for compact electrical machines that can be integrated with the IC engine to form compact power units. This paper will describe the design, development and testing of a slotted totally enclosed permanent magnet axial flux machine with field weakening capability. The design addresses the conflicting requirements for intrinsic fault tolerance, efficiency and effective field weakening capability to reduce power electronics cost. Test results will be presented to confirm the consistency of the machine performance predictions.