Large DC Motors

LH Marthinusen provides specialised services for large DC motors with capacities up to 5,000HP. These machines are critical to industrial operations and require structured maintenance, repair and refurbishment to ensure reliable performance and extended service life.

Repair and Refurbishment Capabilities

Our services include a range of electrical and mechanical repair processes to restore machine performance and reliability. These include:

  • Armature rewinds and partial rewinds
  • Manufacture of components where required
  • Field and interpole coil rewind and replacement
  • Commutator refurbishment or replacement
  • Core repair or replacement
  • Brushgear repair or replacement

These activities are carried out to maintain electrical performance and overall machine integrity.

Overhaul and Maintenance

General overhaul services are performed to support ongoing machine reliability and operational stability. These include:

  • Cleaning and drying
  • Static testing
  • Binder replacement
  • Re varnishing or vacuum pressure impregnation
  • Re soldering of commutator connections
  • Commutator skimming and undercutting
  • Brushgear overhauls

Testing and Mechanical Support

Additional services are provided to ensure mechanical stability and performance, including:

  • Non-destructive testing
  • Dynamic balancing of components up to 36 tonnes

Through experienced technical teams and controlled workshop processes, LH Marthinusen delivers repair and refurbishment solutions that support the reliable operation of large DC motors in demanding industrial environments.