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Synchronous Machines - 2 Video Lecture | GATE Notes & Videos for Electrical Engineering - Electrical Engineering (EE)
FAQs on Synchronous Machines - 2 Video Lecture - GATE Notes & Videos for Electrical Engineering - Electrical Engineering (EE)
| 1. What is a synchronous machine? |  |
Ans. A synchronous machine is an electrical machine that operates at a constant speed determined by the frequency of the power system. It consists of a rotor and a stator, where the rotor rotates at the same speed as the rotating magnetic field created by the stator.
| 2. What are the main applications of synchronous machines? | |
Ans. Synchronous machines are widely used in various applications such as power generation, industrial processes, and electric traction. They are commonly used as generators in power plants, as motors in industries, and in electric trains for propulsion.
| 3. How does a synchronous machine differ from an induction machine? | |
Ans. The main difference between a synchronous machine and an induction machine is that the rotor of a synchronous machine rotates at the same speed as the rotating magnetic field, while the rotor of an induction machine rotates at a slightly slower speed than the rotating magnetic field. Additionally, synchronous machines require an external DC power source for excitation, whereas induction machines do not.
| 4. What are the advantages of synchronous machines? | |
Ans. Synchronous machines offer several advantages, such as high efficiency, better power factor control, and the ability to operate at a constant speed. They also have a higher power density compared to induction machines and can handle larger loads. Additionally, synchronous machines are suitable for applications requiring precise speed control.
| 5. How is the synchronization of a synchronous machine achieved? | |
Ans. Synchronization of a synchronous machine is achieved by adjusting the excitation current or the mechanical speed of the rotor. This ensures that the rotor rotates at the same speed as the rotating magnetic field created by the stator. Synchronization is crucial to maintain the machine's constant speed and to enable it to operate in parallel with other synchronous machines in a power system.
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