AXIAL FLUX SURFACE MOUNTED PM MACHINE WITH FIELD WEAKENING CAPABILITY

Abstract

In this paper an axial flux PM machine with field control capability for variable speed application is presented. To achieve such as control, surface mounted PM rotor-pole configuration is shaped so that, a lowreluctance path is included. In thisway, controlling the armature reaction based on vector control allows us to command the airgap flux in a wide range. Magnetizing and demagnetizing effect can be reached with a low stator current requirement. In order to handle the rotor reluctance, an iron and PM sections are include. 3D-FEA is carried out to confirm the viability of the proposed topology. Also a procedure to estimate the d-q parameters for the topology is presented.