The switched reluctance motor is a simple brushless motor technology.
The rotor contains no windings, conductors or magnets.  It is therefore
very robust and especially suitable for high speed and high temperature.
The stator contains the excitation coils.  The power electronic drive is
inherently fault tolerant with the electronics of each phase operating
independently of the others.

Technelec Ltd. has over 20 years experience in the design and control of
switched reluctance motors and have constructed designs with one, two, three,
four, five and seven phases.  One and two phase switched reluctance
motors provide a very low cost solution and are particularly suited to
very high speed applications while higher phase numbers provide smoother
torque output and very good efficiency.