1.

A much lower inertia in Surface wound armature type is obtained by placing the winding on a non-magnetic cylinder which rotates in annular space between permanent magnet stator and stationary rotor.(a) True(b) FalseThis question was posed to me during a job interview.Origin of the question is Controller Components in section Control System and Components of Control Systems

Answer» RIGHT answer is (a) True

Explanation: Because of larger air gap STRONG permanent magnets are needed and much lower inertia is obtained by PLACING non-magnetic cylinder which rotates in annular space between permanent MAGNET STATOR and stationary rotor.


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