Occasionally a synchronous motor is...

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Question 1 of 205eccefa4bacbc34ba4d48241

Occasionally a synchronous motor is configured without an external shaft to drive a load. In this case, the sole purpose of the synchronous motor is improving overall power factor of an electrical distribution system. What is the name of the synchronous motor so constructed?

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🔍 Key Concepts

• Behavior of a synchronous motor when it is not mechanically driving a load • How power factor correction is achieved in AC power systems • Differences between devices used for mechanical power conversion vs those used purely for reactive power (VAR) support

💭 Think About

• Which of these options is commonly associated with improving or correcting power factor in an AC distribution system? • Which devices in the choices are meant to convert electrical power from one form to another (for example, AC to DC, or one voltage/frequency to another) rather than just adjust reactive power? • Think about which term is used for a synchronous machine that runs unloaded and is adjusted (by field current) mainly to supply or absorb reactive power.

✅ Before You Answer

• Identify which terms are tied to mechanical output (driving a shaft or another machine) and which are not • Recall which name is used in power systems for equipment that supplies reactive power (kVAR) to support system voltage and power factor • Eliminate any option whose primary function is energy conversion (AC↔DC or motor↔generator) rather than power factor correction

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