The detection. Its commercial application can be

The
following characteristics of the SRM have attracted researchers to count into
its potential for variable speed application:

•    
Simplified construction with
rotor only consists of laminated steel;

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•    
Concentrated phase winding is
only along the stator poles; 

•    
Absence of permanent magnet
which gives low

Cost
and manufacture methods;

•     The machine can operate at high speed and high temperature operation
since the rotor can act as a cooling source to the stator;

•    
Has higher reliability since
each stage is electrically and magnetically independent; 

Low inertia since it does not have windings or magnets on the rotor
hence machine can work at low wind speed and respond to rapid variations in
scores.                                        The
operation of SRM depends entirely on synchronized excitation of the set of
stator windings to get a continuous rotation of the rotor poles. The front of
the rotor with respect to the excited stator phase varies the inductance of the
machine periodically from maximum, where the rotor and stator poles are
adjusted, to minimum unaligned rotor and stator poles. The inductance is
maximum at the aligned position and lower limit during the unaligned position. By
proper positioning of current pulses, the machine can operate either as a motor
during increasing inductance profile or as a generator during the decreasing
inductance profile. Various literatures are available on the motoring operation
which encompasses almost all facets such as fault, application, structure,
control and also on sensor less rotor detection. Its commercial application can
be viewed in a vacuum cleaner, refrigerator, laundry machine and also electric
vehicles. We can conclude that the operation of SRM as the motor has attained a
full forward motion; all the same, despite its advantages the operation in the
generating mode is slow growing. While there are a number of papers on the
switched reluctance generator (SRG) being published, a comprehensive overview
of the machine operating as a generator has not even been released. Thus, this
report makes an endeavor to present an overview and highlight the recent growth
of the machine in generating mode. The report is set up such that part one
discusses the working rules of the SRG. The next sections include the auto
construction, application, control and converter topologies employed for the
generating mode.