By what means is the voltage output of an AC...

Question 1 / 270705eccefa4bacbc34ba4d481dd

Question 1 of 270705eccefa4bacbc34ba4d481dd

By what means is the voltage output of an AC generator accurately controlled?

Question 1 of 27070

By what means is the voltage output of an AC generator accurately controlled?

🔍 Key Concepts

• AC generator excitation system and how field current affects output voltage • difference between prime mover speed control and voltage regulation • role of the armature versus the field windings in setting terminal voltage

💭 Think About

• Which part of the generator directly creates the magnetic field that cuts the armature conductors? How can we control that magnetic field strength? • Do changes in mechanical input (prime mover) mainly affect frequency, voltage, or both in a governed alternator? • What would shorting parts of the armature or changing the air-gap reluctance actually do in practice—are these precise control methods or more like design/abnormal conditions?

✅ Before You Answer

• Identify which option deals with controlling the DC field current to the rotor/field windings • Eliminate any options that would normally be fixed at design time (like air-gap dimensions) rather than adjusted during operation • Eliminate options that would cause fault or damage instead of fine voltage regulation (e.g., intentional short circuits in the armature)

Question 1 of 27070

By what means is the voltage output of an AC generator accurately controlled?

changing the sensitivity of the prime mover to large changes in voltage

varying the reluctance of the air gap

varying the DC exciter voltage

shorting out part of the armature windings

Question 1 / 270705eccefa4bacbc34ba4d481dd

Question 1 of 270705eccefa4bacbc34ba4d481dd

By what means is the voltage output of an AC generator accurately controlled?

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Question 1 of 27070

By what means is the voltage output of an AC generator accurately controlled?