Magnetic Levitation Centrifugal Compressor: High-Efficiency, Energy-Saving, and Environmentally Friendly Compression Solution for Multiple Industries

Magnetic Levitation Bearings

• No Wear and No Lubrication Required: Enable high-speed operation without wear and tear.
• Real-time Monitoring: Capable of monitoring the rotor and bearing status in real-time.
• Reduced Size and Weight: Without the need for lubrication, the size and weight of the outer shell are reduced.
• Semi-permanent Life and Maintenance-free: Feature a semi-permanent life cycle and require no maintenance.
• 5-Degree-of-Freedom Active Technology: Utilize 5-degree-of-freedom active magnetic levitation bearing technology to achieve rotor levitation through electromagnetic force.

High-Power High-Speed Permanent Magnet Synchronous Motor

• High Efficiency: The main engine adopts an advanced first-class energy efficiency permanent magnet synchronous motor with an efficiency of up to 98%. It can be used in any working condition, and the power factor remains unchanged when the external load changes.
• Compact and Lightweight: Small in size, light in weight, and high in power density.
• High Rotation Speed and Stepless Speed Control: The motor can reach a maximum speed of 60,000 revolutions per minute and can achieve stepless speed control.
• Low Failure Rate and High Transmission Efficiency: The coupling of the motor rotor and impeller reduces intermediate energy consumption, resulting in a low operating failure rate and high transmission efficiency.

Three-Dimensional Flow Impeller

• High-Quality Material: Made of AL7075 aviation forged aluminum, with a backward-curved integral design. The impeller is a semi-open type and is directly connected to the motor shaft.
• Rigorous Testing: Processed by a five-axis machining center and undergoes static and dynamic balance tests according to ISO 1940 standards. The surface is treated with chromic acid anodization for corrosion protection. It has sufficient strength and stiffness, ensuring a safety margin of more than 1.2 times under the maximum speed operating conditions. The efficiency of the centrifugal impeller is not less than 80% within the range of ±20% of the rated volume flow.

Intelligent Control System

• High-Frequency Vector Control Inverter: Independently developed by the company, it can drive motors in the power range of 15 - 1000 kW to operate stably at high speeds and maintain high working efficiency. It has a small starting current, and the inverter efficiency is greater than 97%, with accurate speed control.
• Multifunctional Monitoring: Equipped with multiple detection sensing technologies, storage, memory, and remote collection and control functions. It can send detection data to designated mobile phones or computers in real-time to achieve full-process real-time remote monitoring of the operating status.

• Fully Oil-Free: The unit is completely oil-free, eliminating the need for oil systems, oil pumps, and other components. Without lubricating oil in the refrigerant, the unit does not require the oil pressure difference necessary for ordinary compressors, and the energy efficiency is increased by more than 8% compared to traditional units.
• Longer Service Life: Magnetic levitation units do not need preheating before starting. Moreover, the elimination of mechanical friction makes them more durable than conventional bearings, increasing the service life of the unit.
• Low Operating Costs: With a PLV of 11.5 - 12.18 and a maximum energy efficiency ratio COP of 26, it can save up to 40 - 50% more power than ordinary screw or centrifugal machines (IPLV = 5.5 - 7.5).

• No Impact on the Power Grid: The starting current is only 2A, and there is no pressure difference during starting (conventional products have a starting current of 300 - 1500A). It does not require a soft starter and has no impact on the power grid, saving on power distribution costs.
• Low Noise Operation: The host noise is as low as 70 dB(A), and it can accurately control the load continuous adjustment from 10% (min 2%) to 100%, with higher temperature control accuracy.
• Wide Operating Range: The cold water temperature can range from 3 - 20°C, and the single-cooling type can handle cooling water inlet temperatures above 40°C. It is suitable for water-cooled working conditions and can replace screw and centrifugal units of the same cooling capacity without special considerations. The heat pump type can reach a heating water outlet temperature of above 50°C.

• Volute: Made of cast aluminum, processed by an imported heat treatment center. It has passed a hydraulic pressure test of 1.3 times the maximum working pressure for 30 minutes without leakage, ensuring the safety of the volute.
• Cooling System: To extend the service life of the high-speed motor and motor stator and rotor, an air-cooling + water-cooling cooling system is adopted. The air-cooling system can provide clean filtered air for equipment cooling after passing through the imported filter, with a filtration standard reaching European G4 and F6 standards. A filter differential pressure sensor is installed at the imported filter and the data is displayed in real-time on the screen.
• High-Efficiency Inverter: An independently developed high-frequency inverter for high-speed permanent magnet motors, with strong adaptability, low motor heat generation, high efficiency, and a self-generation function to provide strong protection for the magnetic levitation motor in case of sudden power outages.

• Control System: Each air compressor is equipped with a separate control system, including start, stop, operation control, and fault detection, and provides corresponding input and output interfaces. In case of faults, the equipment can automatically stop running. The control system is designed based on the fail-safe operation principle and is concentrated in a cabinet with signal connection ports. It can automatically adjust pressure, flow, etc.
• Remote Monitoring: It can remotely monitor the equipment operation status and intelligent regulation in real-time. When the customer has a central control system, the company provides transferable signals; when there is no central control system, the customer can purchase it separately.
• Energy Consumption Statistics: Embedded with a real-time energy consumption monitoring function to monitor the actual instantaneous power consumption of the equipment.
• Operation Interface: The local controller is a digital multi-channel input/output protection panel, using Siemens PLC and Siemens human-machine interface.

• Drive System: Equipped with a high-performance, high-speed inverter, which is mature and stable, and can adjust the equipment speed according to working conditions. It communicates with the PLC to monitor the equipment operation in real-time.
• Local Controller Functions: It includes multiple control modes (such as speed, pressure, flow control modes), surge protection, motor overload protection, bearing vibration monitoring, vent valve control, fault signal display, fault signal output, alarm function, and fault shutdown.
• Data Transmission: Equipped with communication interfaces and communication technology protocols, suitable for air compressors within 100 meters from the central control.
• Instruments: Installed with various measuring instruments such as inlet vacuum differential pressure gauge, inlet temperature sensor, outlet temperature sensor, bearing position sensor, main motor winding temperature sensor, electrical room temperature sensor, electrical room filter differential pressure sensor, and air-cooling inlet room filter differential pressure sensor.

• Anti-Surge Valve: Equipped with an electric anti-surge valve. When the working conditions change and the flow rate decreases, the program can judge and open the valve appropriately to prevent surging and shutdown. The opening and closing of the valve are controlled by the control cabinet.
• Dynamic Balance Self-Correction Function: When impurities adhere to the impeller surface, affecting the dynamic balance of the rotating part, the magnetic levitation control system can detect the dynamic balance position and quickly adjust the rotating parts to a new balance position through the control of the magnetic bearings, ensuring the stable operation of the equipment.
• Safety Interlock Protection System: Has a safety interlock protection system to deal with sudden power outages, process system fluctuations, large particles entering, surging, and suspension bearing drops. It includes power outage protection, process system fluctuation protection, anti-surge protection, start-stop protection, and other protection functions such as main power overload protection, main power undervoltage and phase loss protection, and imported filter blockage alarm.

• Corrosion Prevention and Replacement of Electrical Components: The magnetic bearing controller circuit board and connectors are treated with anti-corrosion coatings (plating layers) to be moisture-proof, leakage-proof, shock-proof, dust-proof, corrosion-proof, and anti-aging. The rest all adopt independent PLC modules, which are easy to replace and have strong versatility.
• Factory Standards: Each equipment undergoes performance tests according to JB/T 278 - 2006 before leaving the factory. After meeting the mechanical and dynamic requirements, a performance test report is provided, and the surge zone and the best working condition point are set accordingly.
• Maintenance and Service: During operation, the rotating parts of the magnetic levitation air compressor have no friction with other parts, and no lubrication treatment is required. It is mechanically maintenance-free for life and only requires regular cleaning of the filter cotton.
• Air Quality Cleanliness: The entire magnetic levitation air compressor system has no mechanical transmission structure, achieving 100% oil-free. The compressed air cleanliness reaches ISO 8573 - 1 CLASS 0, ensuring the long-term operation of instruments and meters.

• 1 Motor Limited to medium and low pressure ranges due to rotor stiffness and bearing life issues, and cannot run in reverse, otherwise it will cause motor burnout. Permanent magnet synchronous motor with 97% efficiency, using permanent magnet variable frequency technology; H-class insulation, good heat dissipation, can withstand current overload to ensure production.  
• 2 Transmission Method After long-term use, the screw clearance will increase, and the cost of regular repair or replacement is high. No need for speed-increasing equipment, using direct connection technology and achieving variable frequency speed regulation.
• 3 Bearing When the bearing fails, the main engine is in an unsafe operating state, which can damage the motor and electrical system, reduce the exhaust volume, and even cause the main engine to "lock up". Magnetic levitation bearings, no friction loss; semi-permanent life, no need for regular replacement.

• 4 Mechanical Vibration Large mechanical vibration, especially obvious when loading starts, and has high requirements for the construction foundation. No mechanical vibration, and the magnetic levitation control system can monitor displacement changes, no need for a construction foundation.  
• 5 Cooling Method Oil cooling and air cooling External fan and water cooling.  
• 6 Intelligent Control Limited working condition adjustment methods, controlling loading and unloading by setting upper and lower limits. Intelligent control method, adjusting the equipment to the most suitable operating area through variable frequency according to different working conditions.  

• 7 Maintenance and Service Annual maintenance cost is about 200,000 yuan. Mechanical maintenance-free, only need to replace the filter cotton, with an annual cost of 5,000 yuan.  
• 8 Noise High noise due to the periodic connection of the tooth space volume with the suction and exhaust ports. Low noise, below 85 dB, and the sound is gentle. 
• 9 Life Service life is 5 - 10 years, and the efficiency decays significantly as the use time increases. Service life of more than 20 years, no transmission device, and the efficiency remains basically unchanged.  
• 10 Oil-Free Oil lubrication, and oil pollution cannot be avoided. Oil-free, with cleanliness reaching CLASS 0.