Balanced and symmetrical three-phase circuit. Star and delta connection. Phase and line voltages, phase and line currents. Star-delta transition. Analysis of a balanced and symmetrical three-phase circuit by analyzing a single-phase circuit. Unbalanced three-phase circuit. Decomposition of an unbalanced three-phase supply into balanced, positive, negative, and zero series. Decomposition of an unbalanced three-phase load into symmetrical loads. Magnetic circuit analysis in direct current and at low frequencies. Single-phase transformer, ideal transformer, practical transformer, commutation circuit, short and open circuit measurements. Space vector in electrical machines. Electrical equations of electrical machines according to space vector. Electromagnetic torque of electrical machines. Review of various electrical machines. Three-phase synchronous machine as a motor and as a generator, in steady state. A direct current machine as a motor and generator, in steady state. A three-phase induction machine as a motor and generator, in steady state.
TMechanics of electric drive systems. Steady-state mechanical characteristics of direct current, induction-driven, and synchronous machines. Brushless direct current motor. Single-phase induction motors. Transient phenomena in electric drive systems: starting, braking, and speed regulation of electric motors. Heating of electric motors. Methods of selecting electric motors for various mechanical systems. Switching converters for controlling direct current motors.
Single-phase rectifier, uncontrolled and controlled. Three-phase rectifier, uncontrolled and controlled. Three-phase inverter, six steps, voltage source, current source. Matrix converter from alternating current to alternating current.
