EE2302 Electrical Machines II Important Questions

UNIT I

1. Explain the constructional details and working principle of alternator

2. Explain the EMF equation

3. What is synchronous reactance and explain the effect of armature reaction

4. Explain the voltage regulation of alternator by EMF method

5. Explain the voltage regulation of alternator by MMF method

6. Explain the voltage regulation of alternator by ASA method

7. Explain the voltage regulation of alternator by ZPF method

8. Explain in detail about parallel operation of alternator

9. Explain about two reaction theory

10. What is synchronous reactance and explain slip test

11. Explain the characteristics alternator in detail

UNIT II

1. Explain the constructional details and working principle of syn. Motor

2. Derive the torque equation of syn motor

3. Draw and explain V curves and inverted V curves

4. Explain in detail about bus bar operation

5. Explain in detail about power equations

6. Explain the starting methods of syn. motor

UNIT III

1. Explain the constructional details and working principle of 3 phase IM

2. Draw the equivalent circuit of 3 phase IM

3. What is slip and explain slip torque characteristics of 3 phase IM

4. Write the condition for maximum torque of 3 phase IM

5. Explain losses and efficiency of 3 phase IM

6. Explain the tests in detail 3 phase IM

7. Draw circle diagram in detail

8. How to separate no-load losses of 3 phase IM

9. Explain double cage IM

10. Explain induction generator and syn. IM

UNIT IV

1. Explain the need of starter and types of starter in detail

2. Explain rotor resistance starter

3. Explain auto transformer starter

4. Explain star delta starter

5. What is speed control and how to control speed of three phase IM

6. Explain slip power recovery scheme

7. Explain cascade connection in detail

UNIT V

1. Explain the constructional details and working principle of 1phase IM

2. Explain double field revolving theory

3. Draw equivalent circuit

4. Explain starting methods of

5. Explain shaded pole and linear reluctance motor

6. Explain reluctance and ac series motor

7. Explain repulsion and hysteresis motor

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