A rotary brushless electric motor is formed within a cylindrical rotor housing
structure that surrounds an annular stator ring. The stator is formed of a plurality
of individual power modules and corresponding core segments, each module including
electrical control and drive elements supplied by a power source incorporated within
the stator. Such parallel architecture provides relatively independently controlled
functionality for each module. Each module and stator core segment can be individually
installed and removed without disturbing the other units. Should a particular module
or stator core segment fail, it can be easily removed for repair or replacement
and reinstallation.