Conceptual
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Synchro Transmitters and Control Transformers for Position Sensing

This lesson covers the Synchro, an AC electromechanical angular-position transducer operating on transformer principles: a rotating single-phase-excited rotor induces a set of three stator voltages whose relative magnitudes encode the rotor's angular position. Used always as a transmitter/control-transformer pair (never alone), the Synchro serves as an error detector — producing an output voltage proportional to the misalignment between two shafts — for AC position control (servomechanism) systems, angular displacement telemetry, and remote load positioning. The domain is electromechanical angle/position sensing within industrial instrumentation, with the microsyn (a variable-reluctance rotor-winding-free variant) as a related low-torque device.