Unit Objectivees 291
Coefficient of Utilization (CU)
Room Ratio
Depreciation Factor (DF)- Calculate light output of a lighting system.
- Describe the basic principles of electric motor operation.
- Identify and describe the following types of electric motors:
DC Motors
Single-Phase AC Motors
Three-Phase AC Motors - Explain the operation of synchro/servo systems and DC stepping
motors. - Calculate the following, as each relates to electric motor operation:
Horsepower
Speed Regulation
Starting Current
Synchronous Speed
Slip
Rotor Frequency
Efficiency