Types of Electrical Machines: The types of electrical machines and their uses including the transformer, synchronous generator, induction motor, dc machines, permanent magnet machines and small machines. Single and multiphase machines are covered.
Design of Electrical Machines: Design and construction of electrical machines; the general characteristics of the materials from which they are constructed; the magnetic, electrical and heat circuit interdependence and circuit analogies. Permanent magnets and designing of electrical machines using permanent magnet materials.
Equivalent Circuits: Equivalent circuits of each electrical machine type and the derivation of these circuits. Use of the equivalent circuit for performance analysis of the machine, particularly steady-state performance
Dynamics of Electrical Machines: The dynamic performance of electrical machines, induction motor start, parallel operation of synchronous machines, de machine transient behavior, inrush currents. Mathematical techniques to analyse the dynamic. Performance of electrical machines.
Types of Power Electronic Devices: The ideal switch; groupings of power electronic device types; constriction and characteristics of different power electronic devices including the power diode, the power transistor; the IGBT; the thyristor; the MOSFET; the MCT. Use of the power electronic devices in simple circuits and applications.
Circuits: The construction and operation of dc-rectifiers and-dc inverters-including single-phase and multi-phase types. Three-pulse and six-pulse types. The inverter operation including overlap and firing angle delay. Dc—ac applications including the use of pulse-width-modulation. The use of converters in ac-ac applications including the cycloconverter, the pwm inverter, the loadcommutated-inverter. New drive types including the matrix converters and multi-level inverters.
Applications: Use of converters and inverters in practice with electrical machines and their general performance criteria. How to select and specify a drive for a specific application. Protection of circuits.