Motor family

Wound Rotor / Slip Ring Motors

High-starting-torque motors with low inrush current for mills, cranes, hoists, pumps, and fans.

Wound Rotor / Slip Ring Motors industrial motor solution

Wound Rotor / Slip Ring Motors specifications and applications

Slip rings and brush gears are rated for continuous operation and can include brush-lifting and short-circuiting devices.

Preformed copper rotor coils and careful balancing support reliable operation under heavy peak loads.

  • 10 to 25,000 HP
  • 220 V to 13.8 kV
  • 2 to 20 poles
  • Brush lifting available
Wound Rotor / Slip Ring Motors product image Wound Rotor / Slip Ring Motors product image

Engineering considerations

Load-sharing replacement motors

When two motors drive one machine in parallel, replacing one motor requires tight matching of electrical and mechanical behavior so load sharing remains stable.

  • Match torque curve, speed slip, efficiency, inertia, cooling, and starting behavior
  • Preserve shaft height, shaft end, feet, terminal box, and coupling interface
  • Relevant to HPGR, mills, pumps, fans, compressors, and other paired-drive systems

Spare-parts inventory continuity

Replacement motors can be designed around existing spare-parts inventories to reduce stock duplication and maintenance cost.

  • Consider existing bearings, sleeve bearings, carbon brushes, and other maintained components
  • Useful for large plants with high-value motor spares already in stock
  • Supports long-term maintenance continuity

Related case studies

HPGR load-sharing motor replacement

HPGR load-sharing motor replacement

A high-pressure grinding roll application required one motor to be replaced while the remaining parallel motor stayed in service.

Open Case Study

Spare-parts continuity replacement program

Spare-parts continuity replacement program

A replacement motor program was shaped around the customer's existing spare-parts inventory to protect maintenance continuity.

Open Case Study