E301 – Electrical Motors & Motor Controls

E301 – Electrical Motors & Motor Controls


Plant electricians, new engineers, mechanics (who work with and around electrical equipment) can gain significantly from this course.  This course provides fundamental knowledge of how the AC and DC motors function.  This fundamental knowledge is a critical piece of and O&M skills.  The course provides practical knowledge associated with how a motor is constructed, defining components the component purpose, and how it may be at risk.  This course also provides information on the skills necessary to implement a quality preventive maintenance program, to troubleshoot operational problems and corrective maintenance activities for the more common integrity issues. This course discusses construction, operation, and routine preventive / corrective maintenance of:
  • AC & DC Motors
  • Motor Controls

Course Objectives

Upon completion of this course, the participant should be able to:
  • Describe the fundamental design, construction, application and operation of all motors typically found in an industrial site.
  • Explain how a 3-phase motor direction of rotation is reversed.
  • Define torque, starting current, and armature reaction as they apply to AC and DC motors.
  • Describe the methods for determining various motor connections.
  • List and briefly explain six causes for rotating machinery failure.
  • Describe the various types of rotary machinery maintenance: visual inspections, tightness checks, air gap distance, and bearing lubrication and replacement.
  • Describe the following rotating machinery tests: insulation resistance, continuity, vibration analysis, and high potential.
  • Describe the electric-magnetic starting sequence of common AC and DC motors.
  • Describe fundamental operation of the motor controls associated with these start sequences.

Course Outline

  1. Electric & Magnetic Fundamentals: Magnetism,  Electromagnetism,  Field Strength,  Motor Action,  Ohm’s Law
  2. AC & DC Motor Fundamentals: Terms & Definitions,  Motor Enclosures,  Nameplate Data,  AC Motors, Induction Motors, Synchronous Motors,  Wound Rotor Motors,  DC Motors,  Shunt Motors,  DC Series Motors,  DC Compound Motors
  3. Motor Control Fundamentals; Enclosures, Motor Controllers, Control Devices & Symbols, Magnetic Contactors, Control Circuits, Hand-Off Auto Controls, Interlocking Methods for Reversing Control, Sequence Control, Motor Control Center, One-Line Diagrams, Elementary Diagrams, Developing a Control Circuit
  4. Control of Motor Starting: Full Voltage Starters, Reduced Voltage Starters, Wye-Delta Starters, Part Winding Starters, Speed Controllers, Consequent Pole Controllers, Variable Frequency Drives, Wound Rotor Motor Controllers, Synchronous Motor Controllers, Acceleration Control, Control Power, DC Controller, Vacuum Contactors, Routine Inspection & Maintenance, Troubleshooting
  5. Motor Maintenance: Causes of Rotating Machinery Failure, AC Rotating Machine Maintenance, AC Machine Testing, Special AC Rotating Machines, DC Machine Maintenance, Brush Rigging & Brush Maintenance, Causes of Unsatisfactory Brush & Commutator Performance, National Electric Testing Association Guidelines, Connections & Terminal Markings for AC Motors
  6. Motor Branch Circuit Protection: Motor Branch Circuit, Safety Switches & Fuses, Molded Case Circuit Breakers, Motor Controller, Grounding & Preventive Maintenance, Troubleshooting
  7. Motor Protection; Over-Current, Under-Voltage, Differential

Course Dates / Location / Fee

See HPC’s website www.TurbineGeneratorTraining.com for the latest schedule information Also, please recognize this course is purposely scheduled back-to-back with E302, Circuit Breaker & Transformers (Low & Medium Voltage), attend both courses and benefit with a discounted price.

Frequently Asked Questions

  • Will HPC Technical Services bring this course to our location for our personnel only? YES, call or email Stephen Parker, Stephen@TurbineGeneratorTraining.com for a price quotation.
  • Will HPC Technical Services customize the presentation at our site to suit our particular needs?
  • Is HPC Technical Services' textbook available for purchase as a reference document?
  • What is the cost for HPC Technical Service to deliver this course at our location? Well, of course that can vary and it needs to priced on an individual need basis.  One large variable is if there are requests to customize the material or if there is use of plant prints / procedures, and if there are any equipment walkdowns.
  • Is HPC Technical Services' consultants available for "technical advise" on the evaluation of your maintenance procedures, systems, tests?   Contact Stephen Parker at Stephen@TurbineGeneratorTraining.com for information.

What you will receive

  • HPC Technical Services' fully illustrated textbook:  Electrical Motors & Motor Controls.
  • HPC's Certificate of Completion with 14 PDH awarded.


All HPC instructors are educated ‘experts’ on the subjects they teach, with years of relevant hands-on experience (typically 20+ years), and have proven instructional skills.  Brief resumes can be looked up on HPC’s website, www.TurbineGeneratorTraining.com.