EET 240 - Electrical Power/Motors

 
Description
This course delineates the application of electrical theory and the use of electrical machinery and equipment. Direct current motors, generators and alternating current machinery, such as transformers, single-phase motors, polyphase and induction motors are studied. Typical motor control devices, such as Diode for Alternating Current (DIAC), Triode for Alternating Current (TRIAC) and Silicon Control Rectifiers (SCR) are also covered.

1. Analyze linear voltage regulators and calculate the percentage of the voltage regulation of the power supply.
2. Compare and contrast the differences and similarities of electric and magnetic circuits.
3. Analyze and design magnetic circuits, such as lifting magnet, both in English and System International.
4. Calculate the percentage of voltage regulation and efficiency for both generators and motors.
5. Analyze the operations of automatic motor speed control.
6. Solve problems for motors, generators and transformers at the engineering technology level.

1. Introduction to magnetism and magnetic circuits: similarities between magnetism and electricity, nonlinear effects of ferromagnetic materials, series and series/parallel magnetic circuits
2. Principles of voltage and torque generation: voltage induced in a conductor, voltage induced by a coil, force produced by a conductor, Lenz’s Law, torque developed by a conductor, back electromotive force (counter emf)
3. DC machine construction: armature, interpoles, compensating winding, field poles, mechanical structure, armature windings
4. DC generator characteristics: basic generator equation, separately excited generator, voltage regulation, generator efficiency, series, shunt and compound generator, parallel operation
5. DC motor characteristics: basic motor equation, back emf, speed regulation, motor efficiency, series, shunt and compound motor, permanent magnet motor, starting and stopping a DC motor
6. Control of direct-current motors: techniques of speed control, automatic speed control, computer speed control using an SCR
7. Transformers: review of single phase AC circuits, basic transformer theory, practical single-phase transformer, voltage regulation, efficiency, multiple-winding transformer, auto-transformer, review of three-phase AC theory, three-phase transformer
8. Single-phase motors: single-phase induction motors, split-split-phase, shaded pole and capacitor-start motor, series motor, single-phase synchronous motor, characteristics
9. The three-phase induction motor: construction, rotating field concept, theory of operation, speed relationship, analysis of rotor behavior, efficiency, typical characteristics, starting techniques

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