ECE 2207: Electrical Machine-I

Credits: 3.00

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1. Transformer

• Ideal Transformer
  • Transformation ratio
  • No-load and load vector diagrams
• Actual Transformer
  • Equivalent circuit
  • Voltage regulation
  • Testing:
    • Open circuit (OC) test
    • Short circuit (SC) test
• Three-Phase Transformer
  • Connections
  • Vector groups of three-phase transformers
  • Phase conversion

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2. Three-Phase Induction Motor

• Rotating magnetic field (RMF)
• Equivalent circuit
• Vector diagram
• Torque-speed characteristics
• Effect of changing rotor resistance and reactance on torque-speed curves
• Motor torque and developed rotor power
• Motor Testing:
  • No-load test
  • Blocked rotor test
• Starting methods, electric braking, and speed control
• Induction generator

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3. Single-Phase Induction Motor

• Theory of operation
• Equivalent circuit
• Starting methods