Synchronous Machines | GATE Notes & Videos for Electrical Engineering - Electrical Engineering (EE) PDF Download

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FAQs on Synchronous Machines - GATE Notes & Videos for Electrical Engineering - Electrical Engineering (EE)

1. What are the main differences between synchronous machines and asynchronous machines?
Ans. Synchronous machines operate at a constant speed determined by the frequency of the AC power supply, while asynchronous machines operate at varying speeds depending on the load. Synchronous machines have a fixed rotor speed synchronized with the stator field, whereas asynchronous machines have a rotating magnetic field induced by the stator.
2. How does a synchronous machine maintain synchronism with the grid?
Ans. Synchronous machines maintain synchronism with the grid by adjusting the field excitation to match the grid frequency. This ensures that the rotor speed remains in sync with the grid frequency, allowing for stable operation.
3. What are the applications of synchronous machines in electrical engineering?
Ans. Synchronous machines are commonly used in power generation plants, industrial applications, and electric motors. They are preferred for applications requiring constant speed operation, high efficiency, and precise control of power output.
4. How does the power factor affect the performance of a synchronous machine?
Ans. The power factor of a synchronous machine is crucial for efficient power transfer and voltage regulation. A leading power factor improves the machine's efficiency and reduces losses, while a lagging power factor can result in poor voltage regulation and increased reactive power consumption.
5. What are the advantages of using synchronous machines in electrical systems?
Ans. Synchronous machines offer high efficiency, precise control of power output, and good voltage regulation. They are also capable of operating at leading power factors, which can improve the overall power system performance.
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