🔍 Key Concepts

• Basic construction of a synchro transmitter used in antenna/servo systems • Difference between rotor winding and stator windings in rotating electrical machines • Why many control/position-indicating devices use a three-phase (three-wire) stator arrangement

💭 Think About

• Think about how many separate stator windings are needed to represent angular position as an electrical signal over 360 degrees. Is this usually done with two, three, or more phases? • Consider the mechanical part: does the rotor normally have multiple separate windings or just one winding whose position changes relative to the stator? • In typical synchro systems, which part (rotor or stator) carries the excitation, and which part provides the position-dependent voltages?

✅ Before You Answer

• Verify how many stator phases are standard in common synchro/servo and antenna position systems (often related to 3-wire connections). • Confirm whether a rotor in a standard synchro transmitter is usually a single winding or multiple distinct windings. • Eliminate any answers whose combination (number of rotor vs. stator windings) does not match the usual three-phase synchro transmitter design.