Here’s a professional technical description of a shaft-mounted PMSM design for integrally-geared screw compressors. From structure design to application.
• Direct-Coupled Architecture
► PMSM rotor mounted directly on compressor main shaft
► Elimination of coupling/gearbox (100% power transmission efficiency)
• Flange-Mounted Stator
► Precision-machined flange interface with compressor housing
► IP66 protection for oil/gas environments
• High-Torque Rotor Design
► 16-pole V-shaped IPM (Interior Permanent Magnet) topology
► NdFeB magnets with high coercivity (>2000 kA/m)
• Optimized Stator
► Fractional-slot concentrated winding (FSCW) for torque ripple <2%
► Laminated core with 0.35mm silicon steel sheets
|
Parameter |
Specification |
|
Shaft Connection |
Hydraulic shrink-fit coupling |
|
Bearing System |
Hybrid ceramic bearings (L10 life >100,000 hrs) |
|
Cooling Method |
Jacket cooling (water/glycol) + stator air ducts |
|
Vibration Level |
<1.5 mm/s RMS (ISO 10816-3 compliant) |
• Energy Efficiency
► IE5 efficiency class (η >96% at full load)
► 15-25% lower losses vs. induction motor drives
• Operational Benefits
► Speed range: 500-6,000 rpm (field-weakening capability)
► Instantaneous torque: 300% rated torque for 30 sec
► Built-in encoder (23-bit absolute) for <0.01° positioning
• Oil-Resistant Materials
► Viton seals for lubricant compatibility
► Anti-corrosive coating on windings (Class H insulation)
• Pulsation Damping
►Harmonic injection algorithm for torque ripple cancellation
► Torsional vibration analysis up to 10× running speed
API 617 (Process gas compressor standards)
ISO 1940-1 (Rotor dynamic balance G2.5 grade)
ATEX Directive 2014/34/EU (Explosive atmospheres)
Hydrocarbon processing compressors
HVAC screw chillers (R134a/R513A refrigerants)
Industrial air systems (40-100 psig operating pressure)
Would you like detailed CAD integration guidelines or electromagnetic simulation data for this configuration? Contact with our engineer about this Compact Integrated Screw Compressor Motor now.
