Case Studies

Electric Motor Case Studies

Field examples of motor replacement, cooling upgrades, VFD compatibility, torque matching, and brownfield application engineering.

All Case Studies

Applied engineering examples.

HPGR load-sharing motor replacement
Mining 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.

HPGR parallel-drive applicationMatched electrical and mechanical behaviorBrownfield installation
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Cooling upgrade for 4,600 kW replacement motor
Cement cooling upgrade

Cooling upgrade for 4,600 kW replacement motor

An ELIN motor replacement was redesigned with an upgraded cooling system while preserving the installation envelope.

4,600 kW motorIC511 to IC516 cooling upgradeFrame reduction from 1250 mm to 900 mm
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Twin boiler feed pump replacement
Power plant replacement

Twin boiler feed pump replacement

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

630 kW6 kV10-pole motor
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Identical terminal-box brownfield replacement
Oil and gas brownfield

Identical terminal-box brownfield replacement

A brownfield replacement motor was engineered with main and auxiliary terminal boxes matching the original motor layout.

Main terminal box duplicationAuxiliary terminal box duplicationFixed cable routes
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Torque and speed-curve matched replacement
Cement driven-machine matching

Torque and speed-curve matched replacement

A replacement motor design was matched against the original speed-torque behavior and driven-machine load curve.

Speed-torque curve reviewLoad-curve matchingStarting current review
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Spare-parts continuity replacement program
Maintenance continuity

Spare-parts continuity replacement program

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

Critical spares reviewInventory continuityLarge motor maintenance
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DC-to-AC motor conversion with VFD control
Drive modernization

DC-to-AC motor conversion with VFD control

An obsolete DC motor replacement path was converted into an AC motor and VFD package while protecting the driven machine requirements.

DC-to-AC conversionVFD-controlled replacementProcess speed matching
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Obsolete motor drop-in replacement without site changes
Obsolete motor replacement

Obsolete motor drop-in replacement without site changes

An old and obsolete motor was replaced with an upgraded modern design while keeping the installation footprint stable.

Obsolete motor replacementNo major site changesFoundation and coupling preservation
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Sea-water pump synchronous motor replacement
Water intake replacement

Sea-water pump synchronous motor replacement

A 60-year-old Westinghouse synchronous motor for a sea-water pump was replaced even though no site drawings remained available.

1,500 HP4,160 VSynchronous motor
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VFD-compatible slurry pump replacement
Mining VFD replacement

VFD-compatible slurry pump replacement

A copper mine slurry pump motor was replaced with a VFD-compatible design and improved electrical performance.

800 kW8-pole690 V SCIM
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Hazardous Gas Compressor Motor Package
Oil and gas hazardous area

Hazardous Gas Compressor Motor Package

An 8,400 kW, 11 kV gas compressor motor package was coordinated for hazardous-area duty, soft-starter operation, and critical process reliability.

8,400 kW11 kV4-pole motor
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District cooling chiller motor references
District cooling references

District cooling chiller motor references

Project references show extensive medium-voltage motor use in GCC district cooling plants.

700+ MV motorsYork chiller compressor duty3 kV and 11 kV ratings
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