Which component supplies an AC signal from the rotor in a synchro control system?

In a synchro control system, the component that supplies an AC signal from the rotor is the control transformer. This device is essential for the operation of synchros, as it converts the varying magnetic fields generated by the rotor's movement into an electrical AC signal. This AC signal is then utilized in the feedback loop to ensure accurate positioning and control of the system.

The control transformer works by taking the input from the rotor and transforming it into a proportional output voltage that reflects the rotor's angular position. This feedback is crucial for synchronizing the system and achieving precise control.

Other options, while possibly relevant to a general understanding of electrical systems or control mechanisms, do not specifically pertain to the function of providing an AC signal from the rotor in a synchro control system. For instance, a synchronous generator usually converts mechanical energy into electrical power rather than acting specifically as a feedback component for rotor position. A phase-shifting relay is typically involved in controlling circuits or managing phase alignment but does not directly relate to rotor feedback in this context. Similarly, a feedback resistor might be used in various electrical circuits for signal conditioning but doesn't function as a source of AC signal from the rotor. Therefore, the control transformer is the most suitable component for supplying the necessary AC signal in