Scope for Designing High Torque Switched Reluctance Motor with Low Ripples

Abstract

The paper discusses the problem of the ripples in the
torque characteristic of the switched reluctance motor
which is the main drawback otherwise the SRM
possess excellent characteristics for applications in
many commercial drives. Lots of researches attempted
to solve the problem by changing the design
parameters of this type of motors but the average
torque decreases. There is limitation on the output
torque of the SRM per unit volume; to decrease the
ripples the average torque always decreases. From
this point of view the paper clarifies the necessity of
optimising the SRM for at least two cost functions: low
ripples and high average torque. The optimization of
the SRM is difficult and inaccurate due to high nonlinear
characteristic of the SRM; so the paper
introduces a direct and simple way to select the
parameters of the SRM for these two cost functions. In
addition, the paper shows how to adjust the operating
parameters to run the SRM to deliver high output
torque with low ripples.