Which of the following statements is true...

🔍 Key Concepts

• Three-phase alternator construction: relationship between stator (stationary windings) and rotor (rotating magnetic field) • How three phases are produced: number of stator windings vs. number of rotating magnetic systems • Difference between stator windings and rotating magnets/field windings in typical marine AC generators

💭 Think About

• Ask yourself: In a standard rotating-field three-phase alternator, which part is multiplied by three to create three phases – the stator windings or the rotating magnetic systems? • Visualize the machine: Is it more common (and practical) to have several sets of stationary windings with one rotating field, or one big stationary winding with several rotating fields? • Think about how the three separate output phases are taken off the machine terminals – do they usually come from three distinct windings or from just one winding?

✅ Before You Answer

• Identify which component is stationary (stator) and which is rotating (field/rotor) in a rotating-field alternator. • Confirm whether standard three‑phase alternators typically use three separate stator windings or one stator winding to generate three phases. • Check if it is practical or common to have multiple separate rotating magnet systems inside one alternator for each phase.

Which of the following statements is true concerning all rotating-field three-phase alternators?

Each has three separate but identical, interconnected stator windings (one for each phase) acted on by one system of rotating magnets.

Each has one stator winding acted on by three separate but identical, interconnected systems of rotating magnets (one for each phase).

Each has one stator winding acted on by one system of rotating magnets.

Each has three separate but identical, interconnected stator windings (one for each phase) acted on by three separate but identical, interconnected systems of rotating magnets (one for each phase).

🔍 Key Concepts

💭 Think About

✅ Before You Answer