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Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on
Either (a) or (b)
Partly on stator and partly on rotor
Stator
Rotor
Either (a) or (b)
Partly on stator and partly on rotor
Stator
Rotor
Answer
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Related Question
Automatic Control Systems
In force current analogy, displacement x is analogous to
Charge
Magnetic flux linkage
Voltage
Electrostatic energy
Charge
Magnetic flux linkage
Voltage
Electrostatic energy
Answer
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Automatic Control Systems
In the field controlled motor the entire damping comes from
Armature resistance
Field resistance
Motor friction and load
Back emf
Armature resistance
Field resistance
Motor friction and load
Back emf
Answer
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Automatic Control Systems
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if
Both A and B
The gain is increased beyond upper critical value
None of these
The gain is decreased below lower critical value
Both A and B
The gain is increased beyond upper critical value
None of these
The gain is decreased below lower critical value
Answer
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Automatic Control Systems
The effect of adding poles and zeros can be determined quickly by
Bode plot
Root locus
Nyquist plot
Nichols chart
Bode plot
Root locus
Nyquist plot
Nichols chart
Answer
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Automatic Control Systems
Which control action can never be used alone?
Integral
Proportional
Both (b) and (c)
Derivative
Integral
Proportional
Both (b) and (c)
Derivative
Answer
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