Integrated Screw Compressor PMSM Motor

An Integrated Screw Compressor PMSM Motor is a high-efficiency Permanent Magnet Synchronous Motor designed specifically for rotary screw air compressors.
Unlike traditional induction motors, the PMSM motor integrates directly with the airend, eliminating mechanical coupling, increasing energy efficiency, and significantly reducing system noise and maintenance.

This integrated structure enables the compressor to achieve IE4/IE5-level efficiency, higher reliability, and better performance at variable speeds.

Higher efficiency of IE5 class. Excellent stator and rotor design. Super strong permanent magnet materials and imported bearings. Precision-machined flange interface with compressor housing. IP66 protection for oil/gas environments. The motor power range from 7.5KW to 37KW on stock. It can achieve wide-frequency speed regulation operation to save energy. The cooling methods can be air cooling or oil cooling.

Typical applications: Hydrocarbon processing compressors; HVAC screw chillers; Industrial air systems.

Why PMSM Motors for Screw Compressors?

Permanent Magnet Synchronous Motors have become the global trend for modern air compressors because they deliver:

Higher efficiency (up to 97–98%)

Higher power density with smaller size

Better energy savings under variable load

Higher starting torque for heavy load compression

Lower heat, lower noise, longer service life

This makes PMSM the best drive motor for next-generation oil-free and oil-injected screw compressors.

Performance data

Vol: 380V

Rated Speed: 3000-3600 RPM

Rated Power: 7.5KW/11KW/15KW/22KW/37KW

Rate Current: 13A-68.2A

Rate Torque: 20Nm-118Nm

Insulation Class: H

Size Drawing:

Key Features & Advantages

1. Integrated Direct-Drive Structure

No gearbox, no belt, no coupling

Zero transmission loss

More stable operation and lower vibration

Longer motor and airend life

2. Ultra-High Energy Efficiency (IE4/IE5)

Efficiency up to 97–98%

Permanent magnet rotor eliminates rotor copper losses

Saves 15–35% energy compared to induction motors

3. High Torque Output for Heavy-Duty Compression

Excellent low-speed torque

Fast response to load changes

Suitable for continuous industrial operation

4. Compact & Lightweight

Smaller footprint compared with traditional induction motors

Ideal for compact compressor designs

5. Variable Frequency Drive (VFD) Compatible

Optimized for inverter systems

Smooth start & precise speed control

Eliminates peak inrush current

6. Low Noise, Low Heat, Low Maintenance

Less mechanical friction

Lower thermal load

Very low maintenance cost for end users

Applications

Our Integrated PMSM Motors are widely used in:

Oil-injected screw air compressors

Oil-free water-lubricated compressors

High-efficiency variable-speed air compressors

Industrial compressed air systems

Energy-saving retrofit projects

Integrated direct-drive compressed air units

Why Choose Our PMSM Motors for Screw Compressors?

✔ Compressor-Specific Design

Optimized magnetic circuit and torque-speed characteristics for screw compression.

✔ OEM Customization

We supply PMSM motors to global compressor brands and OEM factories.

✔ High Reliability for Continuous Operation

Designed for 24/7 industrial operation in harsh conditions.

✔ Complete Technical Support

Torque curve analysis, controller matching, and airend integration support.

✔ International Certification

CE / UL / ISO9001 / RoHS available for global markets.