Power & Energy applications

Power generation sites need motor systems that support critical pumps and fans with high uptime.

Legacy references include GE and Siemens replacement projects for thermal, combined cycle, and natural gas power plants.

FD fans
Boiler feed pumps
Cooling water pumps
Utility systems

Relevant case studies

Twin boiler feed pump replacement

One of two Siemens 630 kW, 6 kV, 10-pole boiler feed pump motors was replaced without site modifications.

Open Case Study

Engineering notes for this sector

PAM two-speed controlled-flow operation

Pole Amplitude Modulation motors provide two fixed speeds from a single winding, helping pumps and fans reduce energy use without a full variable-frequency package.

Single-winding, two-speed squirrel cage construction
Oil-filled five-pole speed-changing switch is typically installed close to the motor
Lower-speed starting reduces inrush current and thermal stress

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

Identical terminal-box replacement

Replacement motors can be designed with identical main and auxiliary terminal boxes to avoid site cable, terminal, and commissioning changes.

Match dimensions, cable connections, and terminal locations
Reduce shutdown risk during commissioning
Especially useful in brownfield replacements where cable routing is fixed

Torque and speed-curve matching

Replacement designs must consider existing load curves, starting current, and speed-torque behavior so the new motor remains compatible with the driven machine.

Match original speed-torque curve and starting behavior
Reduce inrush current where possible
Keep adequate torque safety factor during network voltage drop and soft-start operation

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