Teaching Responsibility
LJMU Schools involved in Delivery:
LJMU Partner Taught
Learning Methods
Lecture
Practical
Tutorial
Module Offerings
5509ICBTEL-APR-PAR
5509ICBTEL-JAN-PAR
5509ICBTEL-SEP_NS-PAR
Aims
This module introduces the student to basics of Electrical Machines and appropriate control techniques. In particular, student is introduced to steady state and transient modelling of synchronous machines.
Learning Outcomes
1.
Evaluate the single-phase equivalent circuit representations and operation of the transformer, induction and synchronous machine and perform load calculation.
2.
Explain the operation and characteristics of step-up and step-down DC-DC converters and phase-controlled AC-DC converters, including switching losses.
3.
Calculate the operating conditions and sketch the waveforms for set-up and step-down DC-DC converters and phase controlled AC-DC converters and analyse the input current of single-phase rectifiers and determine the power factor, input displacement factor and distortion factor.
4.
Recognize harmonic distortion produced by power electronic circuits
Module Content
Outline Syllabus:Single-Phase Transformers. Principles of operation. Equivalent circuit. Load calculations. Open- and short-circuit. Tests. Regulation. Loss mechanisms. Uses of transformers. Construction (including high-frequency). Basic design principles and example.
Induction Machines. Production of a rotating field. Induced EMF in the rotor, the concept of slip. Equivalent circuit. Performance calculations. Loss mechanisms. Efficiency. Torque/speed characteristics. Load curves and speed of operation. Speed control by classical means. The need for variable frequency.
Synchronous Machines. Machine topologies and construction. Equivalent circuit. Performance. Phasor diagrams. Simple operating charts. Stability.
DC-DC Converters. Principle of switched-mode power conversion. Power MOSFET and IGBT devices. Step-up and step-down chopper circuits. Inductive switching waveforms and switching losses.
AC-DC Converters. Single-phase, half and full-wave rectifier circuits with inductive DC filter. Thyristor characteristics. Single-phase, phase-controlled operation - rectification and inversion modes - applications. Power transfer to non-linear loads, harmonics, power factor, input displacement factor and distortion factor.