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Electrical Engineering - ELEN 455

Energy Conversion

• Describe the difference between motors and generators.
• Describe the similarity of transformers and machines.
• Discuss trends relating to the use of induction motors in industry.
• Discuss trends relating to the use of synchronous generators.
• Discuss the codes and standards that apply to machines.
• Describe the role of NEMA and the role of IEEE and ASME in machine standards.
• Discuss Faraday’s Law and Magnetic Field Effects as they pertain to machines.
• Model the ideal transformer and various three phase connections.
• Discuss the practical considerations affecting transformer operation.
• Model the transformer with core losses and winding losses.
• Describe transformer ratings including the two transformers for three phase analysis
• Discuss instrument transformers and compare them to power transformers.
• Calculate output voltages and currents given AC machine parameters
• Calculate power and torque in synchronous generators.
• Discuss the differences between machines “operating alone” and connected to the system.
• Calculate transient effects in synchronous generators.
• Discuss considerations in starting machines and synchronizing to the grid.
• Calculate slip in induction motors.
• Calculate power and torque in induction motors.
• Discuss speed control in motors including variable speed drives.
• Describe the various configurations of dc motors.
• Describe the advantages and disadvantages of dc motors compared to ac motors.
• Calculate the power flow and losses in dc machines.
• Understand when it is appropriate to use single phase motors.
• Discuss generator operations when connected to an infinite bus
• Calculate generator short circuits for various fault currents of concern.
• Discuss assumptions normally made concerning data errors.
• Discuss assumptions normally made in performing stability studies.
• Apply the equal area criteria used in stability studies.
• Calculate the “first swing” to determine stability.
• Understand the difference between steady state and transient stability.