switched reluctance SR Drive® system
comprises a simple brushless motor with a dedicated electronic
is produced by the magnetic attraction of a steel rotor to
stator electromagnets. No
permanent magnets are needed, and the rotor carries no “squirrel
cage” or windings.
The rotor’s position relative
to the stator is detected using a simple hardware sensor or by
electronic 'sensorless’ means. The
controller then energizes each stator winding only when it can
produce useful torque. By suitable timing of the stator
excitation, the machine can operate as a motor or generator,
with exceptional efficiency over a wide range of speed and torque.
Thanks to its inherent simplicity, the switched
reluctance SR Drive® system
is – both
mechanically and electrically – highly
robust. Properly designed and controlled, the motor yields
high efficiency across a very wide range of load conditions,
and outperforms conventional technologies in most applications – especially
where high starting torque, high speed and/or wide constant power
speed range are needed.
Low energy losses in both the rotor
and power electronics eases thermal management and enhances reliability
and efficiency, whilst the compact stator windings permit great
flexibility in motor shape.
In both standard and custom designs, SR
Drive® systems offer
uniquely flexible, high-performance and cost-effective variable-speed
solutions for all applications.