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What
is a synchronous motor ? |
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It is similar
to a squirrel cage induction motor with the difference
being the rotor has salient poles or permanent
magnets. |
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Mark Elektriks
developed synchronous motors in 1980s and are
regularly manufacturing them in two designs a)
Reluctance Synchronous motors b) Permanent magnet
synchronous |
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Manufacturing
Range |
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Reluctance
Synchronous motor construction : 0.09
KW to 7.5 KW in 4pole,6 pole and 8 pole
construction |
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Permanent Magnet
Synchronous motor : 0..09KW to
11KW in 4 pole and 6 pole construction |
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Similarities in above two models |
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Both the motors
have similar torque speed characteristics, similar
construction (except rotor) and work on the same
principle of synchronous speed. In both the motors
the motor speed is dependant on input frequency |
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| Differences in the above
two models |
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| PERMANENT
MAGNET |
RELUCTANCE
TYPE |
| Construction
wise They have Permanent magnets embedded
in the rotor to form fixed poles in the rotor |
Rotor
has only salient poles and no Permanent magnets
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Application
wise
These are specified for applications where
a constant angular position alongwith synchronism
is required. |
For
normal critical speed applications |
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| Construction |
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Reluctance
Synchronous and permanent magnet synchronous motors
are available in IEC frames/ NEMA frames as well
as in non standard frame sizes as per customer
drawings on one to one basis |
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