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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 counter-EMF.
- 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

**Introduction to AC Components and Motors:**This is the first lesson in the AC/DC Motor Theory Course. This lesson identifies the components of an AC motor and explains their functions. Basic magnetic principles, sine waves, methods of increasing magnetic flux in a conductor, and how a rotating field is created in an AC Motor are presented.**Advanced AC Motor Principles:**The second lesson in the AC/DC Motor Theory Course, this lesson explains synchronous speed and how to calculate it. The lesson demonstrates the relationship between phased current and rotor spin and induction and its effect on a rotor. Slip and how to calculate slip using its formula are also covered.**Three-Phase Motors – Part 1:**This is the third lesson in the AC/DC Motor Theory Course. This lesson defines and explains the components and functions of various three-phase motors. The lesson also defines torque and explains its role in motor operation.**Three-Phase Motors – Part 2:**This is the fourth lesson in the AC/DC Motor Theory Course. This lesson defines and explains the components and functions of externally excited motors, starters, and variable speed drives. There is also a review topic to reinforce the information covered in the lesson, Three-Phase Motors – Part 1.**Single-Phase Motors:**This is the fifth lesson in the AC/DC Motor Theory Course. This lesson trains the participants to distinguish single-phase motors from three-phase motors. Split-phase motors and capacitance start motors are discussed.**Introduction to DC Motors:**This is the sixth lesson in the AC/DC Motor Theory Course. This lesson introduces the learner to DC Motors and their basic components.**Introduction to DC Motor Theory:**This is the seventh lesson in the AC/DC Motor Theory Course. The lesson introduces participants to DC motor theory.**Armature Reaction, Compensation, and Induced Voltage:**The eighth lesson in the AC/DC Motor Theory Course, this lesson demonstrates armature reaction, compensation, and induced voltage.**Series, Shunt, and Compound DC Motors:**This is the ninth lesson in the AC/DC Motor Theory Course. This lesson instructs the participant in the design of series wound, shunt wound, and compound DC motors and how they work.**Permanent Magnet, Universal, and Brushless DC Motors:**This is the tenth lesson in the AC/DC Motor Theory Course. This lesson instructs the student in the design of permanent magnet, universal, and brushless DC motors and how they work.**DC Motor Controls:**This is the final lesson in the AC/DC Motor Theory Course. This lesson trains participants in starters, rotation direction, speed control, and drive controls of DC motors.

IADC RigPass: Now Available in Spanish

Purchase the English version of RigPass and for a limited time, receive the Spanish language version at NO extra charge!