Motor Reliability

Workshop 11 – (1/2 Day) – Tuesday Morning, March 13th

Led by Buddy Lee, (iRAMX),  Ken Piety, (Predictive Maintenance Consultant) &
Dale Cooper, (Tekwell Services)

Introduction – Motor types, reliability statistics, myths of repair

  1. Motor Nameplate Information
  2. Overview of the Motor Repair Process
    1. Disassembly and Evaluation,
    2. test of windings, record findings
    3. Stripping and Cleaning
    4. Burnout and Core Loss Testing
    5. Rewind and test
    6. Install new bearings
    7. Balance rotor, assemble and test

    Rotor and Stator

    1. Inductance, electromotive force, capacitance and resistance
    2. Air gap
    3. Electrical Steels
    4. Winding
    5. Armature Turn and Undercut (DC)

    Good Practice Guide to maintain Motor Efficiency

    1. Influence of the Air Gap Setting
    2. The process of burnout
      1. How many burnout cycles can a motor stand?
      2. Is temperature important?

      Working with your motor shop

      1. Evaluation criteria
        1. Quality Program – Components, Certifications
        2. Procedures – safety, quality, work
        3. Critical Motor Storage Programs
        4. Repair History and Documentation
        5. Shop Testing
          1. Rotor Balance (G1 ISO 1940)
          2. Dynamometer Testing
          3. Core loss
          4. Megger (Phase – Phase and Phase to ground)
          5. Hi-Pot
          6. Polarization Index
          7. Surge
          8. Bar to Bar (DC)
            1. Professional organizations – EASA, IEEE, NEMA, Vibration Institute, SMRP, Hydraulic Institute
            2. Standards of Practice
            3. Certifications – Company and Personnel

            Repair Services

            1. AC Induction Motors
            2. DC Motors
            3. Pumps
            4. Gearboxes
            5. Overhead Cranes

            Field Services case histories

            1. Vibration Analysis
            2. Balancing and Alignment
            3. Motor Circuit Evaluation
            4. Thermography
            5. Power Quality Testing
            6. Ultrasonic Testing
            7. Visual Inspection
            8. Troubleshooting
            9. Electrical repair
            10. Crane Inspections
            11. New, upgraded and custom control panels

            Reliability Data Management

            1. Equipment History
            2. Location History
            3. Motor Repair Tracking Program

            Critical Equipment Asset Management Program

            1. Repair or Replace?
            2. The business case for the R or R dec