Full Service Electric Motor & Generator Repair Is Our Priority

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At Renown Electric, continuously improving our electric motor & generator repair and service capabilities has always been our priority. Our Large Motor and Generator Service Centre is equipped to 50 ton capacity and focuses on repairing and refurbishing all types of large rotating machines. Thanks to our state-of-the-art equipment, we can guarantee our customers a full complement of services for all their rotating equipment needs.

Our team of highly skilled winders, technicians, electro-mechanics, and engineers have an extensive breadth of knowledge and vast experience working with large motors. We also have a group of committed quality control, health and safety, procurement, administrative support, and logistics personnel to support this team and ensure all of your service needs are completed to the highest standards.

Four Key Areas to Serve You

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High Bay Workshop

Our High Bay Workshop station is where motors and generators undergo disassembly, cleaning, and painting. This area provides control over these processes, as they often generate airborne contamination. This part of the facility includes a 50-ton gantry crane and a 20’x12’x12’ baker. Any contamination that is produced is kept isolated from all other shop operations.

We use the following equipment for diverse cleaning and finishing capabilities:

  • Lifting: A 50T gantry crane
  • Stripping:  10’L x 8’W x 8’H stripping booth
  • Washing: 16′ x 15′ washing booth with a grease interceptor pit
  • Heating:
    • Large GUSPRO Burn Off Oven with inside working dimensions of 12’W x 12’L x 12’H; this equipment includes:
      • Two process burners and one oxidizer burner, each rated at 1,000,000 BTU
      • Three Type K thermocouples for precise temperature control
      • DAQPro digital data logger for comprehensive QA recordings of the burn-out cycle
    • Large RAPID Bake Oven with inside working dimensions of 20’L x 12’W x 12’H and a digital chart recorder
  • Varnishing: A 8’x6’x8′ varnish immersion tank with Dolphon CC1105 solventless polyester resin
  • Painting: 12’x12′ spray painting booth
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Winding Workshop

The Winding & Coil Manufacturing Workshop area is where the rewinding of stators, rotors, and armatures takes place. The entire area is climate controlled to ensure all coil making and rewind work is performed in the most appropriate conditions. The area features higher air pressure to aid in Foreign Material Exclusion (FME). These measures are crucial in reducing or minimizing small airborne particulates and preventing the entry of humidity and moisture into sensitive motor and generator components.

For our winding and coil manufacturing operations, we use:

  • A Bartech GTR 3500 formed coil taping robot
  • A Bartech horizontal hydraulic press for coil strand consolidation
  • Two James Model SG 600-C formed coil spreaders
  • A Steelworks hydraulic coil hot double press
  • Peerless automatic wire strand cutter
  • Peerless insulation stripper
  • P + R coil former and looper
  • TS Manufacturing large coil looper with automatic turn taping head
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Main Workshop

Various processes take place in the Main Workshop area. This is where motors and generators undergo inspection, testing, and reassembly.

Our main workshop houses the following equipment:

  • Balancing Equipment: Schenck dynamic balancing stand with CAB690/H60B interface (rated for 44,000 pounds)
  • Lifting: A 45-Ton bridge crane, including 25 Ton and 7 Ton auxiliary hooks
  • Motor Testing Equipment:
    • Our units include:
      • Hipotronics Model MTA 13.8-2000 AC motor test stand (rated for 600V at 1200A to 13.8kV at 84A)
      • Hipotronics MTD.5 – 250 DC motor test stand (rated for 0-500Vdc at 500A)
  • Lathe:
    • Our lathe equipment includes:
      • Peerless heavy duty armature banding lathe with a 50″ swing (rated for 10,000 pounds)
      • Rotor pole assembly lathe with a 130″ swing (rated for 15 tons)
  • A hydraulic press that delivers 100 tons
  • Testing equipment: We use skid-mounted turbo oil lubrication pumps for test running motors that have pressure-fed bearings.
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Loading/Unloading Bay

Our Loading and Unloading Bay features a full tractor-trailer drive-in, enabling vehicles to completely pull into the area to drop off loads. The bay features a 50-ton bridge crane, a 12’x12’x12’ computer controlled burn out oven, and a wide load service door that leads straight to the High Bay Workshop area. To accommodate loads that exceed the crane capacity, this area is also equipped with specialized mobile rigging.

AC Motor Overhaul and Repair

AC rewind in progress

AC Motor remanufacturing capabilities including:

  • Inspection, testing, repair, overhaul, and rewinding of AC motors up to 60,000HP, 13.8kV
  • Dynamic balancing of rotors up to 44,000 lbs
  • Rewind and re-insulation of synchronous field pole rotors
  • Rewinding of mush wound and form wound stators up to 13.8kV
  • Repair, machining, and replacement of slip rings
  • Induction motor squirrel cage rotor rebar and end ring replacement
  • Rewind of Induction Motor Wound Rotors
  • Re-stacking of stator and rotor core laminations

If your AC generator malfunctions or stops working completely, it can cause costly and critical downtime for your company. However, at Renown Electric, we have highly skilled technicians who can expertly repair your generator. Our team offers the following services to ensure your AC generator will run at peak performance:

  • Inspection, testing, repair, overhaul, and rewinding
  • Hydroelectric generator rotor pole rewinding and re-insulation
  • Turbogenerator rotor retaining removal and inspection
  • Hydroelectric generator stator rewinding up to 13.8kV
  • Synchronous generator stator rewinding up to 13.8kV
  • Turbogenerator stator rewinding up to 13.8kV
  • Turbogenerator rotor rewinding

DC Motor and Generator Overhaul and Repair

DC motor Field Service twin rotor removal

Our highly skilled team is well-versed in the repair and maintenance of DC motors and generators.

We offer the following services:

  • Inspection, testing, repair, overhaul, and rewinding of large DC motors and generators
  • Dynamic balancing of armatures up to 44,000 lbs
  • Re-insulation of commutator (pole-face) bars
  • Commutator repair and rebuild
  • Commutator replacement
  • Equalizer replacement
  • Riser tray replacements
  • Commutator machining and undercutting
  • Rewinding and re-insulation of field coils (main field and interpole coils)
  • Rewinding of armatures

Mechanical Repairs and Machine Shop Services

In our new refurbishing and repair service center, we offer a range of mechanical repair and machine shop services. With advanced machining technology, we can perform turning, grinding, shearing, milling, and other machining operations.

Additional capabilities include:

  • Shaft repair, modification, and replacement
  • Weld repairs to motor and generator components
  • Sleeve bearing re-babbitting
  • Boring and bushing of bearing housings
  • Sleeve bearing inspection and repair
  • UT Bond Checking of Babbitt Bearings
  • NDT Inspection Services
  • High-Frequency Induction Brazing
  • Resistance & Induction Brazing
  • Slow Roll Test

Electrical Testing Capabilities

Our new troubleshooting services for large-scale electric motors and generators are all-inclusive, from mechanical to electrical aspects.

We offer the following electrical testing capabilities:

  • Insulation Resistance and Polarization Index
  • DC Hi-Pot testing up to 80kVdc
  • Stator core loss test and hot spot scanning using an infrared camera
  • Winding Resistance
  • Surge testing up to 40kV
  • AC voltage drop test
  • Vibration Analysis
  • RSO (Repetitive Surge Oscilloscope) test
  • AC Hi-pot testing up to 60kVac
  • Laser Alignment
  • AC & DC Drive repairs on-site and in-house

Additional Equipment

  • Welding & Brazing
    To weld refurbished and repaired components and assemblies, our facility has a Lincoln 275 Precision TIG welder. For our brazing operations, we offer high-volume capabilities with two high-frequency induction brazing machines and two Dynaflux resistance brazing units. Our induction brazing machines are Minac 12 Twin units.
  • Electrical Testing
    Quality control is an important part of our services. We offer robust testing services with the following electrical test equipment:

    Electrom Winding Analyzer (Surge Tester), TIG II Mini with 40kV Power Pack
    Phenix AC Hi-Pot Test Set, 0-3/6kV 20/10A 60kV
    40kV PJ Surge Tester, Model 9040
    Hipotronics HD100 40 KVDC Hi-Pot Test Set
    Digital Low Resistance Ohmmeter DLRO 10X
  • Machine Shop
    In our machine shop, we have full lathing, boring, and milling capabilities through the following equipment:

    Lathing units:
    (Large workpieces) Accu-turn 1120 CNC lathe, 70″ swing
    (Small workpieces) Clover 20/29 lathe, 18″ swing
    Boring:
    STANKO Model 1516 Vertical Boring Mill with a 55″ table, four-jaw chuck, and 62″ swing
    Milling:
    A 16″ x 70″ bed milling machine with digital readout capabilities