permanent magnet VFD two stage screw air compressor

With a rated exhaust capacity of 19.9 m³/min and a maximum working pressure of 0.8 MPa, this permanent magnet frequency conversion two-stage screw air compressor is ideal for a wide range of industrial fields, including automobile manufacturing, chemical and pharmaceutical industries, electronics manufacturing, food processing, and more. It is especially suited for industries demanding stable air supply and superior energy efficiency.

The equipment features optimized structural design and advanced control systems to ensure long-term reliability, reduce maintenance costs, and provide enterprises with efficient, environmentally friendly compressed air solutions.

Features of Permanent Magnet Frequency Conversion Two-Stage Screw Air Compressor

1. High-efficiency two-stage compression mainframe:
   Customized two-stage compression screw mainframe significantly improves energy efficiency compared to traditional single-stage compressors. Optimized compression ratio and rotor profile design reduce leakage and friction loss, enhancing volumetric efficiency and equipment lifespan.
2. Permanet magnet synchronous motor (IP65 protection):
   Fully enclosed oil-cooled permanent magnet synchronous motor offers higher torque density and better heat dissipation. IP65 protection ensures dustproof and waterproof performance in harsh environments. Direct-drive coaxial structure eliminates belt or gear losses for 100% transmission efficiency and improved reliability.
3. Intelligent Frequency Conversion & Constant Pressure Control:
   Smart control system automatically adjusts motor speed based on gas demand, precisely controls exhaust volume, and minimizes energy waste. Pressure fluctuations are kept within ±0.01MPa, ensuring stable compressed air quality and enhanced production efficiency. Remote monitoring enables real-time status updates and unattended operation.
4. Low noise, energy saving, and environmental protection:
   Low-noise design and optimized airflow reduce operational sound, ideal for noise-sensitive workplaces. Enhanced oil injection cooling dissipates heat quickly, improving overall energy efficiency. Delivers 15% more air output under the same power compared to single-stage compressors, with energy savings of over 15%, lowering operational costs.

Working Principle

1. Air intake & first-stage compression: Ambient air enters the first-stage screw chamber via the inlet filter and is compressed to intermediate pressure. Cooling lubricant is injected during compression to lower temperature and reduce energy loss.
2. Intermediate cooling: The compressed air passes through an intermediate cooler where enhanced oil injection cooling lowers the air temperature before the second stage.
3. Secondary compression: The cooled air is further compressed in the second-stage screw chamber to a working pressure of 0.8 MPa. Equal pressure ratio distribution technology optimizes interstage pressure, reduces leakage, and enhances efficiency.
4. Intelligent control & energy-saving optimization: The frequency conversion system dynamically adjusts motor speed to meet air demand, avoiding unnecessary energy use. Real-time monitoring of pressure, temperature, and airflow allows for optimal operation and extended equipment life.

Application Fields

• Automobile manufacturing: Ideal for body welding, painting, assembly, and other processes requiring stable and efficient air supply.
• Chemical and pharmaceutical: Meets strict requirements for clean, stable compressed air in production, improving product quality.
• Electronics & semiconductor: Supplies constant-pressure, clean air for electronic component manufacturing, reducing defects.
• Food & beverage: Provides hygienic and safe air for food processing, beverage filling, and related applications.
• Textile & printing: Enhances efficiency and reduces downtime in textile equipment and pneumatic printing systems.
• Metallurgy & machining: Ensures stable air supply for CNC machines, stamping, laser cutting, and other applications, boosting productivity and reducing failures.