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Tachogenerator Feedback

Read the following statement in the context of a DC motor position control system.Statement 1:Rate feedback is often provided to improve the damping of control system.Statement 2:The rate feedback is provided by a tachogenerator.Choose the correct option from the following:
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Answer & Explanation
Correct AnswerA. Both statement 1 and statement 2 are correct.

Quick Explanation

Rate feedback adds a signal proportional to motor speed and increases damping, reducing oscillation and overshoot. A tachogenerator produces a voltage proportional to shaft speed, so it is the conventional sensor used for rate feedback. Both statements are correct.

Formula / Key Relation

Vt=Ktω
Tachogenerator Feedback explanatory diagram

Detailed Explanation

Correct Answer

A — Both statement 1 and statement 2 are correct.

Statement-wise Analysis

Statement 1: True

Statement 2: True

Concept and Reasoning

Rate feedback adds a signal proportional to motor speed and increases damping, reducing oscillation and overshoot. A tachogenerator produces a voltage proportional to shaft speed, so it is the conventional sensor used for rate feedback. Both statements are correct.

Calculation / Key Relation

Vt=Ktω

Exam Takeaway

Tachogenerator = speed/rate feedback.

Common Mistake

Do not confuse rate feedback with position feedback.

Quick Trick

Tachogenerator = speed/rate feedback.

Common Mistake

Do not confuse rate feedback with position feedback.

Exam Tip

Tachogenerator = speed/rate feedback.

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