A diesel-driven synchronous generator is operated at 400 rpm and has a frequency rating of 60 Hz. How many poles does it have? a) 4 b) 12 c) 18 d) none of the above A) How many cycles are generated in one revolution of a 24-pole AC generator? a) 5 b) 12 c) d) 300 none of the above B) How many revolutions per second must it make to generate a frequency of 60 Hz? a) 5 b) 12 c) 300 d) none of the above C) How many revolutions per minute must it make to generate a frequency of 60 Hz? a) 5 b) 12 c) 300 d) none of the above

Introductory Circuit Analysis (13th Edition)
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Chapter1: Introduction
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b.

c.

### Figure 8: Diagram of a Three-Phase Stator Winding

This illustration depicts a three-phase stator winding typically found in electric motors or generators. The diagram is circular, representing the stator core, and is sectioned into winding groups.

- **Winding Groups**: The stator core is divided into several winding groups, each containing coiled wire. These wires are strategically placed to create a magnetic field when electrical current passes through them.

- **Phases**:
  - **L1**: The first set of windings is connected to phase L1.
  - **L2**: The second set corresponds to phase L2.
  - **L3**: The final set aligns with phase L3.

- **Arrangement**: The windings are arranged symmetrically around the stator core. Each phase is distributed evenly, ensuring a balanced magnetic field is produced. This balance is crucial for the smooth operation and efficiency of the motor or generator.

The diagram provides a detailed overview of how the coils are connected and distributed around the stator, which is critical for understanding the workings of three-phase motors and generators.
Transcribed Image Text:### Figure 8: Diagram of a Three-Phase Stator Winding This illustration depicts a three-phase stator winding typically found in electric motors or generators. The diagram is circular, representing the stator core, and is sectioned into winding groups. - **Winding Groups**: The stator core is divided into several winding groups, each containing coiled wire. These wires are strategically placed to create a magnetic field when electrical current passes through them. - **Phases**: - **L1**: The first set of windings is connected to phase L1. - **L2**: The second set corresponds to phase L2. - **L3**: The final set aligns with phase L3. - **Arrangement**: The windings are arranged symmetrically around the stator core. Each phase is distributed evenly, ensuring a balanced magnetic field is produced. This balance is crucial for the smooth operation and efficiency of the motor or generator. The diagram provides a detailed overview of how the coils are connected and distributed around the stator, which is critical for understanding the workings of three-phase motors and generators.
**Synchronous Generator Questions**

1. A diesel-driven synchronous generator is operated at 400 rpm and has a frequency rating of 60 Hz. How many poles does it have?

   a) 4  
   b) 12  
   c) 18  
   d) none of the above  

2. A) How many cycles are generated in one revolution of a 24-pole AC generator?

   a) 5  
   b) 12  
   c) 300  
   d) none of the above  

   B) How many revolutions per second must it make to generate a frequency of 60 Hz?

   a) 5  
   b) 12  
   c) 300  
   d) none of the above  

   C) How many revolutions per minute must it make to generate a frequency of 60 Hz?

   a) 5  
   b) 12  
   c) 300  
   d) none of the above
Transcribed Image Text:**Synchronous Generator Questions** 1. A diesel-driven synchronous generator is operated at 400 rpm and has a frequency rating of 60 Hz. How many poles does it have? a) 4 b) 12 c) 18 d) none of the above 2. A) How many cycles are generated in one revolution of a 24-pole AC generator? a) 5 b) 12 c) 300 d) none of the above B) How many revolutions per second must it make to generate a frequency of 60 Hz? a) 5 b) 12 c) 300 d) none of the above C) How many revolutions per minute must it make to generate a frequency of 60 Hz? a) 5 b) 12 c) 300 d) none of the above
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