The AC/DC Motor Theory course was specifically developed for electricians and electronic technicians as well as for the multi-craft training needs of process and manufacturing facilities. This course consists of 11 interactive, on-line lessons that address AC and DC motor theory.
Identify the components of an AC Motor and explain their function.
Explain the basic principles of magnetism.
Interpret the characteristics of a current as represented on a sine wave.
Describe the effect of AC current on a conductor.
Describe the methods of increasing magnetic flux in a conductor.
Explain how a rotating field is created in an AC Motor.
Explain and be able to calculate synchronous speed.
Explain induction and its effect on a rotor.
Explain the relationship between phased current and rotor spin.
Explain slip and know its formula.
Describe the design of a squirrel cage rotor and function of components.
Describe the design of a wound rotor and function of a wound rotor’s components.
Define torque and explain its role in motor operation.
Explain the design of a reluctance motor and how it works.
Explain the design of an externally excited motor.
Explain how an externally excited motor works.
Explain the function of a motor starter and the most common types of motor starters.
Describe a variable speed drive and its effect on voltage and frequency.
Distinguish a single-phase motor from a three-phase motor.
Explain the design of a split-phase motor and how it works.
Explain the design of a capacitance start motor and how it works.
Identify the general characteristics and advantages of a DC motor.
Identify the basic components of a DC motor.
Explain the function of DC motor components.
Identify the components of the armature and brush assembly; explain their function.
Explain the effect of armature current on the main flux field and motor action
Explain the process of commutation and how it maintains direct current in a DC motor.
Describe how the number of windings and commutator segments effects torque and mechanical power of a DC motor.
Explain how armature reaction shifts the neutral plane in a DC motor.
Explain how armature reaction affects motor operation.
Explain what measures will correct armature reaction.
List the requirements for induced voltage in a motor.
Explain the design of a series wound DC motor and how it works.
Explain the design of a shunt wound DC motor and how it works.
Explain the design of a compound wound DC motor and how it works.
Explain the design of a permanent magnet DC motor and how it works.
Explain how a universal motor runs off of DC power.
Explain the design of a brushless DC motor and how it works.
Explain why a reduced voltage starter is sometimes needed in a motor.
Explain how a reduced voltage starter works.
Explain what determines the direction of rotation of a DC motor.
Explain how a reverse contactor works.
Explain how to control the speed of a DC motor.
Explain how a tapped resistor works.
Explain a DC drive’s control system and how it works