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    Table of contents
    • 1. Understand working principle and construction of transformer.
      • 1.1. Define transformer
      • 1.2. Describe the construction of a transformer.
      • 1.3. Explain the working principle of a transformer.
      • 1.4. Identify the materials used for a transformer construction.
      • 1.5. List different types of transformers.
      • 1.6. Describe Core type, Shell type and Spiral core type transformer.
      • 1.7. Compare between the core type and shell type transformer.
    • 2. Perceive the emf equation, transformation ratio and Losses of transformer.
      • 2.1. Define emf equation, transformation ratio of transformer
      • 2.2. Derive the emf equation of transformer.
      • 2.3. Explain voltage ratio, current ratio and transformation ratio.
      • 2.4. List the losses of transformer.
      • 2.5. Interpret Hysteresis loss, Eddy current loss, Core loss and Copper loss.
      • 2.6. Solve problems on emf equation.
    • 3. Interpret the principle of operation of transformer on no-load condition and load condition.
      • 3.1. Explain no-load operation of transformer.
      • 3.2. Define no-load voltage, current, mutual flux, no load power factor.
      • 3.3. Draw the vector diagram of a transformer on no load condition.
      • 3.4. Solve problems related to no load test.
      • 3.5. Explain operation of a transformer on load condition.
      • 3.6. Draw the vector diagram of transformer on lagging, leading and unity power factor.
      • 3.7. Solve problems related to transformer on load.
    • 4. Understand equivalent circuit of transformer, magnetic leakage and leakage reactance of transformer.
      • 4.1. Draw the equivalent circuit and vector diagram of a transformer.
      • 4.2. Explain the equivalent circuit of a transformer.
      • 4.3. Derive the equivalent resistance of a transformer referred to primary.
      • 4.4. Calculate the equivalent resistance of a transformer referred to secondary.
      • 4.5. Explain magnetic leakage of transformer.
      • 4.6. List the disadvantages of magnetic leakage.
      • 4.7. Calculate leakage reactance of transformer in terms of primary and in terms of secondary.
      • 4.8. Solve problems on equivalent circuit of transformer, leakage reactance and impedance of transformer.
      • 4.9. Define percentage resistance, reactance and impedance.
      • 4.10. Express the deduction of the equation for percentage resistance, reactance and impedance.
    • 5. Realize the open circuit test, short circuit test and voltage regulation of transformer
      • 5.1. Describe open circuit test.
      • 5.2. Describe short circuit test.
      • 5.3. Draw the vector diagrams.
      • 5.4. Solve problems related to open and short circuit test.
      • 5.5. Define voltage regulation.
      • 5.6. Express the deduction of the equation for voltage regulation at unity, lagging and leading power factor.
      • 5.7. Solve problems related to voltage regulation.
    • 6. Understand the efficiency and cooling system of transformer.
      • 6.1. Derive the formula for calculation of efficiency of transformer.
      • 6.2. Explain the factors affecting core loss and copper loss of the transformer.
      • 6.3. Deduce the equation for maximum efficiency.
      • 6.4. Evaluate the variation of efficiency with power factor.
      • 6.5. Define all day efficiency and mention the formula of all day efficiency.
      • 6.6. Solve problems on efficiency, maximum efficiency and all day efficiency.
      • 6.7. Explain the necessity of cooling system of transformer.
      • 6.8. Describe the methods of cooling system the transformer.
      • 6.9. Narrate the transformer oil and its properties.
    • 7. Realize the construction and Principle of operation of three phase transformer.
      • 7.1. Describe the construction of three phase transformer.
      • 7.2. List various methods of connection of 3-phase transformer and their applications.
      • 7.3. Describe the methods of star–star, delta–delta, star–delta and delta–star connection.
      • 7.4. Outline open delta connection or V-V connection.
      • 7.5. Describe Scott or T-T connection.
      • 7.6. Explain the application of V-V and T-T connection.
      • 7.7. Draw the connection of 3-phase to 2-phase and vice-versa.
    • 8. Comprehend the principle of auto-transformer.
      • 8.1. Describe auto-transformer.
      • 8.2. Explain the terms transformed power and conducted power.
      • 8.3. List the advantages and disadvantages of auto-transformer.
      • 8.4. Convert a Two-winding transformer to auto-transformer.
      • 8.5. Mention the uses of auto-transformer.
      • 8.6. Solve problems related to auto-transformer.
    • 9. Understand the principle of parallel operation of transformer.
      • 9.1. Describe the purpose of polarity test.
      • 9.2. Describe the subtractive and additive polarity.
      • 9.3. Illustrate the test to determine the polarity of a transformer
      • 9.4. Explain the purpose of parallel operation.
      • 9.5. List the conditions for parallel operation.
      • 9.6. Describe the parallel operation of transformers with equal voltage ratio.
      • 9.7. Explain the specification on the name plate of a transformer.
      • 9.8. Solve problems related to parallel operation.
    • 10. Realize the principle and construction of 3-phase induction motor.
      • 10.1. Explain the general principle of induction motor.
      • 10.2. Distinguish between induction motor and conduction motor.
      • 10.3. List various types of induction motor with their applications.
      • 10.4. Mention different parts of a 3-phase induction motor.
      • 10.5. Describe the construction of stator of an induction motor.
      • 10.6. Narrate the construction of squirrel cage rotor, double squirrel cage rotor and phase wound rotor of induction motor.
      • 10.7. Explain the purpose of skewing the rotor bars in a squirrel cage rotor.
      • 10.8. Define slip and slip speed.
      • 10.9. Express the derivation of the equation r f = s f and (1 s) P 120f
      • 10.10. Outline rotor voltage, rotor current and rotor power.
      • 10.11. Solve problems related to slip. .
    • 11. Recognize the concept of development of rotating magnetic field and torque in rotor.
      • 11.1. Explain the development of rotating magnetic field for three phase induction motor.
      • 11.2. Express the deduction of the formula
      • 11.3. Demonstrate the principle of rotation of a 3-phase motor.
      • 11.4. Clarify starting torque, running torque and maximum torque.
      • 11.5. Explicit the deduction of the equation of starting torque, running torque and maximum torque.
      • 11.6. Describe the condition for maximum torque at running and starting condition.
      • 11.7. Mention the relation between torque and rotor power factor.
      • 11.8. Explain the relation between torque and speed.
      • 11.9. Draw the torque speed curve.
      • 11.10. Explain the effect of changing the voltage on torque and speed.
    • 12. Perceive the concept of Power stages of induction motor.
      • 12.1. List the losess in 3-phase induction motor.
      • 12.2. Indicate different stages of power developed in an induction motor.
      • 12.3. Solve Energy stages related problems.
    • 13. Understand the equivalent circuit and maximum Power output of an induction motor.
      • 13.1. Explain the equivalent circuit of an induction motor.
      • 13.2. Clarify maximum power output of an induction motor.
      • 13.3. Express the deduction of the maximum power output RL =Zo
    • 14. Realize the principle of starting of a 3-phase induction motor.
      • 14.1. Explain the purpose of starter.
      • 14.2. List the starters used for starting 3-phase induction motor.
      • 14.3. Describe the direct Online starter method, Start-delta starter method (manual and automatic), Auto transformer starter method of starting squirrel cage induction motor.
      • 14.4. Illustrate the rheostat method of starting slip ring induction motor. .
    • 15. Understand the principle of speed control of induction motor.
      • 15.1. List the methods of speed control of 3-phase induction motor.
      • 15.2. Describe speed control by changing applied voltage, changing applied frequency and changing stator poles.
      • 15.3. Describe rheostat control method, concatenation method & injecting emf in rotor circuit method.
    1. 66761
    2. AC MACHINES-1 (66761) Theory

    AC MACHINES-1 (66761) Theory

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    7. Realize the construction and Principle of operation of three phase transformer.

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