Course Overview
This course examines the operating theory, construction, testing, application, protection and control of electric machines. Building upon the principles of electric circuit theory and magnetic circuit theory, the following topics are studied: three phase power, transformers, induction machines, synchronous machines, DC machines, stepper motors, single phase motors, fuses, circuit breakers, motor control, programmable logic controllers, polyphase rectification.
Prerequisite(s)
- 50% in ELEX 7120
Credits
3.0
- Retired
- This course has been retired and is no longer offered. Find other Flexible Learning courses that may interest you.
Learning Outcomes
Upon successful completion, the student will be able to:
Single Phase AC Circuits
- Use Euler's Identity to represent and manipulate voltage, current and power.
- Use phasors to represent AC quantities both graphically and analytically.
- Define and determine active power, reactive power, apparent power, complex power, power factor.
- Use the power triangle to represent AC power graphically.
- Use the per unit system to represent circuit quantities.
Three Phase Circuits
- Describe the generation of three phase power.
- Identify characteristics of three phase power and differentiate from single phase power.
- Analyze wye and delta connected, 3-wire circuits.
- Analyze 4-wire circuits.
- Analyze balanced and unbalanced loads.
- Analyze non-linear loads and harmonics.
- Use the symmetrical components technique to analyze three phase circuits.
Magnetic Circuits
- Relate magnetic circuit quantities to their electrical analogs.
- Interpret magnetization curves and determine their electrical implications.
- Relate hysteresis and energy loss in a magnetic circuit.
- Determine the forces on a current carrying conductor in a magnetic field.
- Determine the induced voltage in a conductor in a magnetic field.
- Relate eddy currents and energy loss in a magnetic circuit.
Transformers
- Explain transformer principles of action.
- Outline transformer construction.
- Describe the magnetic flux effects of an electrical load connected to a transformer.
- Incorporate the transformer equivalent circuit in circuit analysis.
- Determine transformer losses.
- Determine transformer parameters via laboratory test procedures.
- Connect transformers to obtain specified voltage and phase shift objectives.
- Analyze and apply autotransformer principles.
- Analyze transformer inrush current.
- Describe the use of instrument transformers.
Induction Motor
- Explain induction motor principles of operation.
- Outline induction motor construction.
- Explain the NEMA operating classifications for induction motors.
- Analyze normal load behaviour.
- Analyze overload behaviour.
- Analyze off-voltage and off-frequency behaviour.
- Analyze inrush current.
- Analyze and explain the operation of the wound rotor induction motor.
Synchronous Motor
- Explain synchronous motor principles of operation.
- Outline synchronous motor construction.
- Explain synchronous motor starting.
- Analyze steady-state operation.
- Analyze over and under excitation effects.
- Analyze normal load behaviour.
- Analyze overload behaviour.
- Analyze braking.
Synchronous Generator
- Explain synchronous generator principles of operation.
- Outline synchronous generator construction.
- Explain the concept of an infinite bus.
- Analyze steady-state operation.
- Analyze over and under excitation effects.
- Analyze normal load behaviour.
- Analyze overload behaviour.
- Analyze the interaction between the prime mover and the synchronous generator.
- Synchronize a generator with the utility network.
- Explain and analyze "watt sharing" and "var sharing" among parallel generators.
DC Machine
- Explain DC machine principles of operation.
- Outline DC machine construction.
- Explain the electro-mechanical rectification performed by commutator and brushes.
- Analyze and explain self-excited and separately excited machines.
- Analyze and explain shunt, series and compound excitation.
- Analyze normal load behaviour.
- Analyze and explain "loss of field" and its effects on machine behaviour.
Stepper Motor
- Explain stepper motor principles of operation.
- Outline stepper motor construction.
- Explain resolution, step angle, stepping frequency, step accuracy.
- Explain step operation, half-stepping and micro-stepping.
Single Phase Induction Motor
- Explain single phase induction motor principles of operation.
- Outline single phase induction motor construction.
- Explain the dual counter-rotating field.
- Explain starting.
- Explain phase splitting.
Other Motors
- Analyze and explain the operation of the universal motor.
- Analyze and explain the operation of the shaded pole motor.
- Analyze and explain the operation of the reluctance motor.
- Analyze and explain the operation of the hysteresis motor.
Fuses and Circuit Breakers
- Explain the operation of fuses and circuit breakers.
- Explain the interrupt capacity of fuses and circuit breakers.
- Explain thermal and magnetic operating principles.
- Explain the time response of fuses and circuit breakers.
- Explain the operating principles of ground fault circuit breakers.
Effective as of Fall 2006
Programs and courses are subject to change without notice. Find out more about BCIT course cancellations.