The generator shaft encoder sends signals to the frequency converter for maintaining ______ of the rotor and stator.

The generator shaft encoder sends signals to the frequency converter for maintaining ______ of the rotor and stator.

• A. Torque
• B. Speed
• C. Alignment
• D. Synchronization

Answer: (D)

The signal from the shaft encoder is used to keep the rotor and stator operating in step with each other, so the rotor’s magnetic field stays properly aligned with the stator’s rotating field. The frequency converter uses the encoder’s position and speed information to adjust output frequency and phase, maintaining a constant angular relationship between rotor and stator. This is what we mean by synchronization. If the rotor slips relative to the stator, the machine loses synchronous operation and the output becomes unstable. Torque and speed are related effects, but the key purpose of the encoder feedback here is to preserve synchronization between rotor and stator.

The signal from the shaft encoder is used to keep the rotor and stator operating in step with each other, so the rotor’s magnetic field stays properly aligned with the stator’s rotating field. The frequency converter uses the encoder’s position and speed information to adjust output frequency and phase, maintaining a constant angular relationship between rotor and stator. This is what we mean by synchronization. If the rotor slips relative to the stator, the machine loses synchronous operation and the output becomes unstable. Torque and speed are related effects, but the key purpose of the encoder feedback here is to preserve synchronization between rotor and stator.