Switched Reluctance Motor Market - Positive Long-Term Growth Outlook 2016 – 2024
Developed
by Sir James Dyson, Switched reluctance motor also called as variable
reluctance motor market is an electric motor operates by producing
reluctance torque between iron laminated rotor and energized stator
pole. It does not require any permanent magnets. Stator is similar to
brushless dc motor. So in switched reluctance motors, mechanical
construction design is simplified but electrical designing becomes
complicated. Number of phase in the motor determine the number of
pole in stator. A 3-phase motor has 6 stator poles as 2 opposite
ended stator pole forms one phase of the motor. Count of rotor poles
is always different from stator poles. Phase winding in case of
switched reluctance motor resides on stator only. Windings used
switched reluctance motor are concentrated windings. To form the
phase of the motor, connection of windings in series on the stator
poles is done. As both stator and rotor are simple in construction
and design, faults are less and hence more fault tolerant. One of the
major advantages of switched reluctance motor are they continue to
run with disabled or shorted poles but with the reduced smoothness or
torque. Disadvantages of the switched reluctance motor are that
difficulty to control, noisy, have torque ripple effect, need shaft
sensor for operation. Torque in switched reluctance motor has
limitation of maximum allowed current and bus voltage speed.
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Some
of the applications of switched reluctance motor are air conditioning
system which are environment friendly for passenger trains, advanced
weaving machine technology, motor blower for vacuum cleaning, and
food processor compact drives. Switched reluctance motor also find
applications in high volume appliances and appliances which have very
high starting torque. Considerable efforts are made to improve on the
noise characteristics of switched reluctance motor but this can still
be a limitation for applications where operating speed range required
is very broad. Mechanical design same as switched reluctance motor is
used in generator. Such generators run with much higher speed than
the conventional ones. Single phase switched reluctance motors are
mostly used because of their low cost of manufacturing. Maximum duty
cycle of a single phase witched reluctance motors is 0.5 and due to
this there is high torque discontinuity and hence high noise and
torque ripple. Home appliances and hand tools which are insensitive
to the high noise and torque ripple use this single phase switched
reluctance motor.
Major
drivers for the market include high torque density property of
switched reluctance motors as compared to induction motors. Improved
efficiency has also increased the demand for switched reluctance
motors. Construction of switched reluctance motors is more rugged as
compared with the induction motors which has also augmented the
demand for the switch reluctance motor. Another driver for the market
is the switch reluctance motor’s application in cost efficiency and
energy. Application in high power electronic switches is another
reason for growth in the market. The switch reluctance motor’s
suitability to be used in very high temperature ambience is also the
factor increasing the use of the switch reluctance motor in the
market. Major advantage of being least expensive of all the motor
types is the key reason for the growth of the switch reluctance motor
market. One of the key challenges posed to the switch reluctance
motor market is its disadvantage of acoustic noise and torque ripple.
The
market can be segmented based on the application (Fuel Pump, Throttle
Control, Oil Pump, Vacuum Cleaner, Lawnmower, Washing Machine, Fans,
Automatic doors in buildings and vehicles), type (4/2 2-Phase
switched reluctance motor, 6/3 3-Phase switched reluctance motor),
and geography (North America, Europe, Asia Pacific, Middle East &
Africa, Latin America).
Market
Insight can be Viewed @
http://www.transparencymarketresearch.com/switched-reluctance-motor-market.html
The
key players in the market include U.S. Motors, Nidec SR drives,
Maccon, Emotron, Control Engineering etc.
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