AC and DC Motors

AC and DC Motors

Who are these courses for?

This program is excellent for the training of electricians and electronic technicians as well as for the multi-craft training needs of process and manufacturing facilities.

AC Motor Theory

Prerequisites:

This lesson is designed for participants familiar with AC/DC theory, electrical safetyelectrical print readingelectrical connectionselectrical control equipment, and the proper use of electrical test instruments.

Description:

This lesson shows and explains how to measure winding insulation resistance and winding resistance. The lesson also describes the major components of AC motors and explains the theory behind permanent magnet motors, three-phase motors, and induction motors.

Objectives:
  • Identify the components and principles of operation for the major types of AC motors
  • Measure winding insulation resistance
  • Measure winding resistance in AC motors

AC Motor Theory

Prerequisites:

This lesson is designed for participants familiar with AC/DC theory, electrical safetyelectrical print readingelectrical connectionselectrical control equipment, and the proper use of electrical test instruments.

Description:

This lesson shows and explains how to measure winding insulation resistance and winding resistance. The lesson also describes the major components of AC motors and explains the theory behind permanent magnet motors, three-phase motors, and induction motors.

Objectives:
  • Identify the components and principles of operation for the major types of AC motors
  • Measure winding insulation resistance
  • Measure winding resistance in AC motors

AC Motor Maintenance

Prerequisites:

This lesson is designed for participants familiar with AC/DC theory, electrical safety, electrical print reading, electrical connections, electrical control equipment, AC motor components, AC motor theory, and the proper use of electrical test instruments.

Description:

This lesson shows and explains how to overhaul AC induction motors. Procedures for disassembling, inspecting, cleaning, and reassembling endbells, rotors, and bearings are presented in detail. The lesson also covers procedures for inspecting and cleaning the stator as well as windings and testing the motor once it has been reassembled.

Objectives:
  • Remove endbells, rotor, and bearings from an AC motor
  • Inspect and clean endbells and rotors
  • Reinstall bearings
  • Reassemble an AC motor as well as perform operational tests on it

AC Motor Maintenance

Prerequisites:

This lesson is designed for participants familiar with AC/DC theory, electrical safety, electrical print reading, electrical connections, electrical control equipment, AC motor components, AC motor theory, and the proper use of electrical test instruments.

Description:

This lesson shows and explains how to overhaul AC induction motors. Procedures for disassembling, inspecting, cleaning, and reassembling endbells, rotors, and bearings are presented in detail. The lesson also covers procedures for inspecting and cleaning the stator as well as windings and testing the motor once it has been reassembled.

Objectives:
  • Remove endbells, rotor, and bearings from an AC motor
  • Inspect and clean endbells and rotors
  • Reinstall bearings
  • Reassemble an AC motor as well as perform operational tests on it

DC Motor Theory

Prerequisites:

This lesson is designed for participants familiar with basic electrical principles, electrical safety, electrical print reading, electrical control equipment, Ohm’s Law and Three Phase Motors.

Description:

This lesson introduces participants to the application of direct current motors and their components. This lesson covers general characteristics of a DC motor, DC motor components, their functions and the design of the brush assembly. This lesson explains concepts such as flux interaction, commutation, the effect of multiple windings, armature’ reaction, compensation and CEMF, and how each of these factors effects motor operation.

Objectives:
  • Know the general requirements of a DC motor and what requirements they meet
  • Be able to identify the basic components and explain the functions of a DC motor
  • Identify the components of the brush assembly and explain its function
  • Explain the effect of armature current on the main flux field and how this results in motor action
  • Explain the process of commutation and how this maintains direct current in a DC motor
  • Describe how the number of windings and commutator segments effects torque and mechanical power
  • Explain how armature reaction shifts the neutral plane, how it affects motor operation, and what measures will correct the reaction
  • Know the requirements for induced voltage in a motor, and explain Counter EMF
  • Explain the designs of a series wound, shunt wound, compound wound, and permanent magnet wound motor and how each of them work
  • Learn about reduced voltage starters and what determines the direction of the rotation of a motor
  • Learn how a reverse contractor works
  • Know how a tapped resistor and field rheostat work
  • Know how a drive control system works

DC Motor Theory

Prerequisites:

This lesson is designed for participants familiar with basic electrical principles, electrical safety, electrical print reading, electrical control equipment, Ohm’s Law and Three Phase Motors.

Description:

This lesson introduces participants to the application of direct current motors and their components. This lesson covers general characteristics of a DC motor, DC motor components, their functions and the design of the brush assembly. This lesson explains concepts such as flux interaction, commutation, the effect of multiple windings, armature’ reaction, compensation and CEMF, and how each of these factors effects motor operation.

Objectives:
  • Know the general requirements of a DC motor and what requirements they meet
  • Be able to identify the basic components and explain the functions of a DC motor
  • Identify the components of the brush assembly and explain its function
  • Explain the effect of armature current on the main flux field and how this results in motor action
  • Explain the process of commutation and how this maintains direct current in a DC motor
  • Describe how the number of windings and commutator segments effects torque and mechanical power
  • Explain how armature reaction shifts the neutral plane, how it affects motor operation, and what measures will correct the reaction
  • Know the requirements for induced voltage in a motor, and explain Counter EMF
  • Explain the designs of a series wound, shunt wound, compound wound, and permanent magnet wound motor and how each of them work
  • Learn about reduced voltage starters and what determines the direction of the rotation of a motor
  • Learn how a reverse contractor works
  • Know how a tapped resistor and field rheostat work
  • Know how a drive control system works

DC Motor Maintenance

Prerequisites:

This lesson is designed for participants familiar with basic electrical principles, electrical safety, electrical print reading, electrical control equipment, and preferably with AC and DC motor theory and AC motor maintenance.

Description:

This lesson describes some of the basic concepts of DC motors; explains how DC motors differ from AC motors; describes the components of a DC motor and their functions. This lesson also covers DC motor maintenance, including commutator inspection and maintenance as well as brush maintenance; explains various types of commutator problems and how to remedy diem; describes how to select, install, and seat brushes.

Objectives:
  • Maintain a DC Motor, including identifying components of a DC motor commutator and their functions
  • Describe the color of the commutator and explain the function of the oxide film
  • Identify wear patterns and the causes of arcing, high mica, uneven segments and thrown solder, and know how to correct them
  • Explain how to prepare a commutator for reconditioning, how to undercut the mica of a commutator, and how to clean and check the commutator after maintenance
  • Describe how to inspect, select, install and seat brushes
  • Describe the procedures for cleaning and inspecting the brush holders
  • Explain how to adjust spring pressure

DC Motor Maintenance

Prerequisites:

This lesson is designed for participants familiar with basic electrical principles, electrical safety, electrical print reading, electrical control equipment, and preferably with AC and DC motor theory and AC motor maintenance.

Description:

This lesson describes some of the basic concepts of DC motors; explains how DC motors differ from AC motors; describes the components of a DC motor and their functions. This lesson also covers DC motor maintenance, including commutator inspection and maintenance as well as brush maintenance; explains various types of commutator problems and how to remedy diem; describes how to select, install, and seat brushes.

Objectives:
  • Maintain a DC Motor, including identifying components of a DC motor commutator and their functions
  • Describe the color of the commutator and explain the function of the oxide film
  • Identify wear patterns and the causes of arcing, high mica, uneven segments and thrown solder, and know how to correct them
  • Explain how to prepare a commutator for reconditioning, how to undercut the mica of a commutator, and how to clean and check the commutator after maintenance
  • Describe how to inspect, select, install and seat brushes
  • Describe the procedures for cleaning and inspecting the brush holders
  • Explain how to adjust spring pressure

more product information

How can online training improve AC and DC motor reliability?

ITC Learning’s AC and DC motor training series provides technicians and maintenance teams with the practical knowledge needed to work confidently with industrial motor systems. This structured, self-paced training covers core motor theory and maintenance procedures to cut mean-time-to-repair (MTTR) and support reliable plant performance.

Compliance Standards for Motor Maintenance (NFPA 70B & 70E)

Maintaining industrial motors requires strict adherence to safety and reliability standards to prevent catastrophic failures. Our courses reinforce electrical safety practices, including Lockout/Tagout (LOTO) and Arc Flash awareness, aligned with NFPA 70E requirements. Furthermore, the training supports the development of an Electrical Maintenance Program (EMP) as mandated by NFPA 70B, emphasizing scheduled inspections and testing to ensure equipment remains in safe, peak operating condition.

Operational Impact: Reducing Downtime through Motor Diagnostics

Industrial motors are the workhorses of the plant floor; when they fail unexpectedly, production stops. ITC training equips technicians with a practical mental model to trace power, verify three-phase balance, and find high-resistance faults. By moving from reactive repairs to proactive predictive maintenance—using tools like infrared thermography and insulation resistance testing—maintenance teams can catch subtle issues before they escalate into costly outages.

Feature ITC Learning Business ImpactEstimated ROI Implementation Time
Course Content Focused on real-world, plant-floor applicability over pure theory. High: Reduces rework and MTTR.Immediate: Self-paced, 24/7 access.
Skills AssessmentsIdentify specific knowledge gaps to personalize learning paths.Optimized: 60%+ see ROI in under 18 months.Instant: Pre-hire or post-hire baseline.
Compliance Alignment Aligned with NFPA 70E/70B and NEC awareness. Risk Mitigation: Avoids OSHA fines and insurance hikes.Ongoing: Simplifies audit documentation.
Alternative: Interplay/TPCOften utilizes generic e-learning or VR-heavy models. Variable: May lack ITC’s 50+ year industrial depth.Moderate: Often requires hardware setup.
Traditional Training Expensive travel and production disruption. Low: Slow “trial and error” learning.Slow: 5+ years to reach journey-level.

Frequently Asked Questions

  • Can these courses be used for multi-craft technician development?

    Yes. The series is specifically designed for technicians in multi-craft roles who need to split time between mechanical, instrumentation, and electrical tasks. It provides a solid foundation for cross-training mechanical teams in electrical motor fundamentals

  • Does the training cover both theory and maintenance for AC and DC motors?

    Absolutely. The curriculum includes dedicated modules for both AC and DC Motor Theory, as well as separate courses for AC and DC Motor Maintenance to ensure learners understand how systems work and how to fix them.

  • How do these courses help with NFPA 70B compliance?

    NFPA 70B now mandates a documented Electrical Maintenance Program (EMP). Our training provides the technical knowledge for tasks like insulation resistance testing and connection torquing, which are essential for maintenance teams to meet these enforceable standards.

  • Can technicians place out of motor training if they are already proficient?

    Yes. If a learner scores 90% or higher on the initial 20-question skills assessment, your organization can allow them to place out of the course. This ensures your workforce focuses only on closing actual knowledge gaps.

  • Is the motor training content SCORM-compliant for our existing LMS?

    Yes. All ITC Learning content is SCORM-compliant and can be seamlessly integrated into your existing platform, or delivered through our full-featured hosted portal.

AC Motor Theory

Prerequisites:

This lesson is designed for participants familiar with AC/DC theory, electrical safetyelectrical print readingelectrical connectionselectrical control equipment, and the proper use of electrical test instruments.

Description:

This lesson shows and explains how to measure winding insulation resistance and winding resistance. The lesson also describes the major components of AC motors and explains the theory behind permanent magnet motors, three-phase motors, and induction motors.

Objectives:
  • Identify the components and principles of operation for the major types of AC motors
  • Measure winding insulation resistance
  • Measure winding resistance in AC motors

AC Motor Theory

Prerequisites:

This lesson is designed for participants familiar with AC/DC theory, electrical safetyelectrical print readingelectrical connectionselectrical control equipment, and the proper use of electrical test instruments.

Description:

This lesson shows and explains how to measure winding insulation resistance and winding resistance. The lesson also describes the major components of AC motors and explains the theory behind permanent magnet motors, three-phase motors, and induction motors.

Objectives:
  • Identify the components and principles of operation for the major types of AC motors
  • Measure winding insulation resistance
  • Measure winding resistance in AC motors

AC Motor Maintenance

Prerequisites:

This lesson is designed for participants familiar with AC/DC theory, electrical safety, electrical print reading, electrical connections, electrical control equipment, AC motor components, AC motor theory, and the proper use of electrical test instruments.

Description:

This lesson shows and explains how to overhaul AC induction motors. Procedures for disassembling, inspecting, cleaning, and reassembling endbells, rotors, and bearings are presented in detail. The lesson also covers procedures for inspecting and cleaning the stator as well as windings and testing the motor once it has been reassembled.

Objectives:
  • Remove endbells, rotor, and bearings from an AC motor
  • Inspect and clean endbells and rotors
  • Reinstall bearings
  • Reassemble an AC motor as well as perform operational tests on it

AC Motor Maintenance

Prerequisites:

This lesson is designed for participants familiar with AC/DC theory, electrical safety, electrical print reading, electrical connections, electrical control equipment, AC motor components, AC motor theory, and the proper use of electrical test instruments.

Description:

This lesson shows and explains how to overhaul AC induction motors. Procedures for disassembling, inspecting, cleaning, and reassembling endbells, rotors, and bearings are presented in detail. The lesson also covers procedures for inspecting and cleaning the stator as well as windings and testing the motor once it has been reassembled.

Objectives:
  • Remove endbells, rotor, and bearings from an AC motor
  • Inspect and clean endbells and rotors
  • Reinstall bearings
  • Reassemble an AC motor as well as perform operational tests on it

DC Motor Theory

Prerequisites:

This lesson is designed for participants familiar with basic electrical principles, electrical safety, electrical print reading, electrical control equipment, Ohm’s Law and Three Phase Motors.

Description:

This lesson introduces participants to the application of direct current motors and their components. This lesson covers general characteristics of a DC motor, DC motor components, their functions and the design of the brush assembly. This lesson explains concepts such as flux interaction, commutation, the effect of multiple windings, armature’ reaction, compensation and CEMF, and how each of these factors effects motor operation.

Objectives:
  • Know the general requirements of a DC motor and what requirements they meet
  • Be able to identify the basic components and explain the functions of a DC motor
  • Identify the components of the brush assembly and explain its function
  • Explain the effect of armature current on the main flux field and how this results in motor action
  • Explain the process of commutation and how this maintains direct current in a DC motor
  • Describe how the number of windings and commutator segments effects torque and mechanical power
  • Explain how armature reaction shifts the neutral plane, how it affects motor operation, and what measures will correct the reaction
  • Know the requirements for induced voltage in a motor, and explain Counter EMF
  • Explain the designs of a series wound, shunt wound, compound wound, and permanent magnet wound motor and how each of them work
  • Learn about reduced voltage starters and what determines the direction of the rotation of a motor
  • Learn how a reverse contractor works
  • Know how a tapped resistor and field rheostat work
  • Know how a drive control system works

DC Motor Theory

Prerequisites:

This lesson is designed for participants familiar with basic electrical principles, electrical safety, electrical print reading, electrical control equipment, Ohm’s Law and Three Phase Motors.

Description:

This lesson introduces participants to the application of direct current motors and their components. This lesson covers general characteristics of a DC motor, DC motor components, their functions and the design of the brush assembly. This lesson explains concepts such as flux interaction, commutation, the effect of multiple windings, armature’ reaction, compensation and CEMF, and how each of these factors effects motor operation.

Objectives:
  • Know the general requirements of a DC motor and what requirements they meet
  • Be able to identify the basic components and explain the functions of a DC motor
  • Identify the components of the brush assembly and explain its function
  • Explain the effect of armature current on the main flux field and how this results in motor action
  • Explain the process of commutation and how this maintains direct current in a DC motor
  • Describe how the number of windings and commutator segments effects torque and mechanical power
  • Explain how armature reaction shifts the neutral plane, how it affects motor operation, and what measures will correct the reaction
  • Know the requirements for induced voltage in a motor, and explain Counter EMF
  • Explain the designs of a series wound, shunt wound, compound wound, and permanent magnet wound motor and how each of them work
  • Learn about reduced voltage starters and what determines the direction of the rotation of a motor
  • Learn how a reverse contractor works
  • Know how a tapped resistor and field rheostat work
  • Know how a drive control system works

DC Motor Maintenance

Prerequisites:

This lesson is designed for participants familiar with basic electrical principles, electrical safety, electrical print reading, electrical control equipment, and preferably with AC and DC motor theory and AC motor maintenance.

Description:

This lesson describes some of the basic concepts of DC motors; explains how DC motors differ from AC motors; describes the components of a DC motor and their functions. This lesson also covers DC motor maintenance, including commutator inspection and maintenance as well as brush maintenance; explains various types of commutator problems and how to remedy diem; describes how to select, install, and seat brushes.

Objectives:
  • Maintain a DC Motor, including identifying components of a DC motor commutator and their functions
  • Describe the color of the commutator and explain the function of the oxide film
  • Identify wear patterns and the causes of arcing, high mica, uneven segments and thrown solder, and know how to correct them
  • Explain how to prepare a commutator for reconditioning, how to undercut the mica of a commutator, and how to clean and check the commutator after maintenance
  • Describe how to inspect, select, install and seat brushes
  • Describe the procedures for cleaning and inspecting the brush holders
  • Explain how to adjust spring pressure

DC Motor Maintenance

Prerequisites:

This lesson is designed for participants familiar with basic electrical principles, electrical safety, electrical print reading, electrical control equipment, and preferably with AC and DC motor theory and AC motor maintenance.

Description:

This lesson describes some of the basic concepts of DC motors; explains how DC motors differ from AC motors; describes the components of a DC motor and their functions. This lesson also covers DC motor maintenance, including commutator inspection and maintenance as well as brush maintenance; explains various types of commutator problems and how to remedy diem; describes how to select, install, and seat brushes.

Objectives:
  • Maintain a DC Motor, including identifying components of a DC motor commutator and their functions
  • Describe the color of the commutator and explain the function of the oxide film
  • Identify wear patterns and the causes of arcing, high mica, uneven segments and thrown solder, and know how to correct them
  • Explain how to prepare a commutator for reconditioning, how to undercut the mica of a commutator, and how to clean and check the commutator after maintenance
  • Describe how to inspect, select, install and seat brushes
  • Describe the procedures for cleaning and inspecting the brush holders
  • Explain how to adjust spring pressure
Course Overview

This comprehensive interactive multimedia training program consists of four individual lessons that train participants to understand, maintain, and test AC and DC motors.

Who This Course is For?

This program is excellent for the training of electricians and electronic technicians as well as for the multi-craft training needs of process and manufacturing facilities.

Platforms:  
Number of Courses: 4
How This Course Helps You
Together, these lessons help participants develop the skills and certifications necessary to:

Improve Efficiency:

Mastering maintenance reduces downtime and extends equipment life.

Ensure Safety:

Understanding motor theory enhances safety and prevents accidents.

Build Expertise:

Gain actionable knowledge to excel in industrial roles.

Advance Careers:

Proficiency in AC/DC systems opens doors to advanced opportunities.