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Class Electrical Machines I

  • Presentation

    Presentation

    This unit is oriented to the study, analysis and dimensioning of the main electromagnetic machines present in the daily life of today's society in its most diverse environments.

  • Code

    Code

    ULHT46-1-1269
  • Syllabus

    Syllabus

    • Introduction to Electric Machines:
      • Reviews on electromagnetism.
      • Introduction to magnetic circuits.
      • Inductance concept.
      • Magnetic properties of materials.
      • Magnetic circuits with sinusoidal excitation.
    • Electrical Transformer (T):
      • Shared magnetic fields and circuits with magnetic coupling.
      • Ideal (T).
      • Transformation of electrical circuit elements.
      • (T) equivalent circuit.
      • AMR
      • Determination of the (T) parameters.
      • Nominal capacity.
      • (T) under load: Voltage regulation, efficiency.
      • "Per unit" values.
      • (T) for poly-phase systems.
      • Autotransformers,
      • Measurement (T).
    • Direct current machine:
      • Magnetic system.
      • Windings, commutator, brushes.
      • Torque and induced voltage.
      • Reversibility.
      • Equivalent circuit.
      • Shunt, series and compound configurations.
      • Binary-speed characteristic.
      • AMR, switching and auxiliary poles.
      • Power balance.
  • Objectives

    Objectives

    This unit introduces some necessary analysis tools and then analyzes, studies and designs electromagnetic transformers and direct current rotary machines.

    The aim is to provide students with analysis capabilities and sizing tools for electrical machines (ME), developing their ability to understand the principles of operation inherent in each machine, as well as their applicability in practical problems.

    At the same time, it is intended that students are able to broaden their critical thinking in the analysis of results, promoting experimental evidence of concepts taught through laboratory tests and simulation work, using models developed by students.

  • Teaching methodologies and assessment

    Teaching methodologies and assessment

    To support the teaching-learning process, slide projections, electrical engineering simulation software and demonstration video projections are used.

  • References

    References

    • Marques, H. S. (2021), Apontamentos de Máquinas Eléctricas I. Lisboa: ULHT
    • Slides da unidade curricular de Máquinas Eléctricas I
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