Title: Identification of Different Parts of a Single-Phase Transformer and AC/DC Motor

Objective

To identify and understand the various components of a single-phase transformer and an AC/DC motor, and to comprehend their functions in electrical systems.

Materials/Equipment

  • Single-phase transformer
  • AC motor
  • DC motor
  • Screwdriver set
  • Multimeter
  • Insulation resistance tester
  • Safety goggles
  • Lab notebook

Procedure

Part 1: Single-Phase Transformer

  1. Visual Inspection: Examine the transformer and identify its external components.
  2. Disassembly: Carefully open the transformer casing using a screwdriver to access internal components.
  3. Identification: Identify and label the following parts:
    • Core: The magnetic core that provides a path for magnetic flux.
    • Windings: Primary and secondary windings (coils of wire).
    • Insulation: Material that separates the windings and core.
    • Tap Changer: Device for adjusting the voltage ratio.
    • Tank: The outer casing that houses the core and windings.
    • Cooling Fins: Structures for dissipating heat.

Part 2: AC Motor

  1. Visual Inspection: Examine the AC motor and identify its external components.
  2. Disassembly: Open the motor casing to access internal components.
  3. Identification: Identify and label the following parts:
    • Stator: The stationary part of the motor that produces a magnetic field.
    • Rotor: The rotating part that turns when the motor is powered.
    • End Bells: Covers that enclose the rotor and stator.
    • Bearings: Support the rotor and allow it to spin freely.
    • Windings: Coils of wire in the stator that create a magnetic field.
    • Shaft: The part that transmits mechanical power.

Part 3: DC Motor

  1. Visual Inspection: Examine the DC motor and identify its external components.
  2. Disassembly: Open the motor casing to access internal components.
  3. Identification: Identify and label the following parts:
    • Stator: The stationary part that provides a magnetic field.
    • Armature: The rotating part that carries the winding.
    • Commutator: A switch that reverses the current direction in the armature.
    • Brushes: Conductive materials that maintain electrical contact with the commutator.
    • Field Windings: Coils that create a magnetic field in the stator.
    • Shaft: The part that transmits mechanical power.

Data/Results

  • Single-Phase Transformer: List the identified parts and their functions.
  • AC Motor: List the identified parts and their functions.
  • DC Motor: List the identified parts and their functions.

Analysis/Discussion

  • Discuss the importance of each component in the operation of the transformer and motors.
  • Explain how the design of each part contributes to the efficiency and functionality of the devices.
  • Compare and contrast the components of AC and DC motors.

Conclusion

Summarize the key findings from the lab, emphasizing the importance of understanding the components of transformers and motors in electrical engineering. Highlight any challenges faced during the identification process and how they were overcome.