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Electrical time-constant of an armature-controlled dc servomotor is :(a) Equal to mechanical time-constant(b) Smaller than mechanical time-constant(c) Larger than mechanical time-constant(d) Not related to mechanical time-constantI got this question at a job interview.I want to ask this question from Construction of Phase-Trajectories in section Nonlinear Systems of Control Systems

Answer»

Right choice is (b) Smaller than mechanical TIME-constant

Explanation: ELECTRICAL time constant is smaller than the mechanical time constant and hence the delay in the mechanical SYSTEMS is more than the electrical systems.



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