A Switched Reluctance (SR) motor is a rotating electric machine where both stator and rotor have salient poles. The stator winding is comprised of a set of coils, each of which is wound on one pole. SR motors differ in the number of phases wound on the stator. Each of them has a certain number of suitable combinations of stator and rotor poles.
The SR motor requires control electronics for it's operation. Several power stage topologies are being implemented, according to the number of motor phases and the desired control algorithm. A power stage with two independent power switches per motor phase is the most used topology. This particular topology of SR power stage is fault tolerant -- in contrast to power stages of AC induction motors -- because it eliminates the possibility of a rail-to-rail short circuit.
