Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > A polyphase system is generated by ______.a)H...
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A polyphase system is generated by ______.
- a)Having two or more generator windings separated by equal electrical angle.
- b)Having generator windings at equal distances
- c)None of the above
- d)A and C
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A polyphase system is generated by ______.a)Having two or more generat...
A generator having two or more electrical windings which are separated by equal electrical angle generates a polyphase electrical system. The electrical angle or displacement depends upon the number of windings or phases. For example, in a three-phase electrical system, the generated voltages are separated from each other by 120 degrees.
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A polyphase system is generated by ______.a)Having two or more generat...
Understanding Polyphase Systems
Polyphase systems are essential in electrical engineering, particularly in alternating current (AC) power generation and transmission. The correct answer to the question highlights the fundamental concept behind the generation of polyphase systems.
Definition of Polyphase Systems
- Polyphase systems involve multiple alternating currents (phases) that are generated simultaneously.
- The most common type is the three-phase system, but systems can have two or more phases.
Generation Process
- Having two or more generator windings separated by equal electrical angle: This is the key aspect of generating a polyphase system.
- Each winding is positioned at equal angular intervals (e.g., 120 degrees apart in a three-phase system).
- This arrangement ensures that the phases are offset in time, leading to a continuous and smooth power output.
Benefits of Polyphase Systems
- Improved Efficiency: Polyphase systems can transmit power more efficiently than single-phase systems.
- Reduced Pulsation: The offset phases help in minimizing the pulsating torque in motors, leading to smoother operation.
- Load Distribution: They allow for better load balancing across the phases, enhancing system stability and performance.
Conclusion
In conclusion, the correct generation of a polyphase system relies on the configuration of generator windings separated by equal electrical angles, making option 'A' the right answer. This fundamental principle provides the basis for various applications in modern electrical engineering, from power generation to distribution systems.
Polyphase systems are essential in electrical engineering, particularly in alternating current (AC) power generation and transmission. The correct answer to the question highlights the fundamental concept behind the generation of polyphase systems.
Definition of Polyphase Systems
- Polyphase systems involve multiple alternating currents (phases) that are generated simultaneously.
- The most common type is the three-phase system, but systems can have two or more phases.
Generation Process
- Having two or more generator windings separated by equal electrical angle: This is the key aspect of generating a polyphase system.
- Each winding is positioned at equal angular intervals (e.g., 120 degrees apart in a three-phase system).
- This arrangement ensures that the phases are offset in time, leading to a continuous and smooth power output.
Benefits of Polyphase Systems
- Improved Efficiency: Polyphase systems can transmit power more efficiently than single-phase systems.
- Reduced Pulsation: The offset phases help in minimizing the pulsating torque in motors, leading to smoother operation.
- Load Distribution: They allow for better load balancing across the phases, enhancing system stability and performance.
Conclusion
In conclusion, the correct generation of a polyphase system relies on the configuration of generator windings separated by equal electrical angles, making option 'A' the right answer. This fundamental principle provides the basis for various applications in modern electrical engineering, from power generation to distribution systems.
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