Active Magnetic Bearings

Advanced Contact-Free Bearing Technology for High-Speed Rotating Machinery

Dawopu Active Magnetic Bearings (AMB) represent a new generation of advanced bearing technology designed to support rotating shafts without physical contact. Unlike conventional bearings that rely on rolling elements or fluid film lubrication, active magnetic bearings use electromagnetic forces to levitate and control the rotor, eliminating mechanical friction and wear.

This innovative technology allows rotating equipment to operate at extremely high speeds while maintaining exceptional stability, accuracy, and reliability. By precisely controlling the magnetic fields through an electronic control system, Dawopu active magnetic bearings can continuously monitor and adjust the rotor position in real time.

As a result, AMB systems provide superior vibration control, minimal energy loss, and significantly reduced maintenance requirements compared with traditional bearing solutions.

Dawopu designs and manufactures high-performance active magnetic bearing systems suitable for demanding industrial applications where precision, efficiency, and operational reliability are critical.

Working Principle of Active Magnetic Bearings

Active magnetic bearings operate based on electromagnetic suspension technology. The system consists of several main components:

• Electromagnetic bearing stators

• Rotor with magnetic interaction surfaces

• Position sensors

• Digital controller

• Power amplifiers

Position sensors continuously measure the rotor’s location inside the bearing housing. This information is sent to a high-speed digital controller, which calculates the necessary electromagnetic force to keep the rotor perfectly centered.

The controller then sends signals to the power amplifiers, which adjust the magnetic field strength in the electromagnets. This closed-loop control system allows the rotor to float in a stable magnetic field without any mechanical contact.

Because there is no physical contact between rotating and stationary components, the system eliminates friction, lubrication requirements, and mechanical wear.

Key Advantages of Dawopu Active Magnetic Bearings

Contact-Free Operation

One of the most significant advantages of Dawopu active magnetic bearings is their non-contact design. Without mechanical contact, there is no friction or wear between components, which greatly extends equipment lifespan.

Ultra-High-Speed Capability

Active magnetic bearings allow rotating machinery to operate at very high rotational speeds without the limitations imposed by conventional bearings.

Reduced Maintenance

Because no lubrication or mechanical contact is required, maintenance intervals are significantly reduced. This results in lower operational costs and improved equipment availability.

Precise Rotor Position Control

The integrated electronic control system continuously monitors rotor position and automatically adjusts the magnetic field to maintain optimal alignment.

Low Energy Loss

The absence of mechanical friction reduces power losses and improves overall machine efficiency.

Vibration Monitoring and Control

Dawopu AMB systems include built-in vibration monitoring capabilities that allow operators to detect and correct dynamic instabilities in real time.

Clean and Environmentally Friendly Operation

Since active magnetic bearings do not require oil lubrication, they eliminate the risk of oil contamination and leakage.

Typical Technical Specifications

The following parameters represent typical design capabilities of Dawopu Active Magnetic Bearing systems. Actual specifications may vary depending on application requirements.

Shaft Diameter Range
50 mm – 500 mm (custom sizes available)

Maximum Rotor Speed
Up to 60,000 RPM depending on system configuration

Radial Load Capacity
Up to 30 kN per bearing

Axial Load Capacity
Up to 100 kN depending on thrust bearing design

Position Control Accuracy
±5 microns

Operating Temperature Range
-20°C to 200°C

Control System Response Time
Less than 1 millisecond

Power Supply
Typically 380–480V industrial power systems

Backup System

Most Dawopu AMB systems include auxiliary touchdown bearings to protect the rotor in case of power interruption.

Applications of Active Magnetic Bearings

Dawopu active magnetic bearings are widely used in high-speed and high-performance rotating equipment where traditional bearing technologies face limitations.

Typical applications include:

• High-speed turbo compressors

• Gas turbine auxiliary systems

• Steam turbine generator systems

• Turbo expanders in petrochemical plants

• High-speed electric motors

• Vacuum pumps and molecular pumps

• Flywheel energy storage systems

• Industrial process compressors

• Cryogenic machinery

These systems are particularly suitable for applications requiring extreme speed, low friction, and precise rotor control.

Industries Served

Dawopu provides active magnetic bearing solutions to a wide range of industries where reliability, efficiency, and advanced technology are required.

Power Generation

Active magnetic bearings are increasingly used in gas turbines, steam turbines, and generator systems to improve operational efficiency and reduce maintenance.

Petrochemical and Oil & Gas

Compressors and turbo expanders used in refining and chemical processing benefit greatly from frictionless bearing technology.

Aerospace and Advanced Engineering

High-speed rotating equipment used in aerospace testing and advanced engineering systems require precise rotor stability.

Energy Storage Systems

Flywheel energy storage systems rely on magnetic bearings to minimize energy losses and enable long-duration operation.

Semiconductor and Vacuum Technology

Magnetic bearings are widely used in high-speed vacuum pumps and semiconductor manufacturing equipment.

Industrial Automation

Advanced industrial machinery and precision rotating equipment benefit from the high accuracy and reliability of AMB technology.

Engineering Expertise and Custom Solutions

At Dawopu, active magnetic bearing systems are designed with a focus on precision engineering, advanced control algorithms, and robust industrial performance.

Our engineering team works closely with clients to develop customized AMB solutions tailored to specific machine requirements. This includes:

• rotor dynamic analysis

• electromagnetic design optimization

• integrated control systems

• custom sensor configurations

• system monitoring and diagnostics

Each Dawopu active magnetic bearing system undergoes strict testing and quality control to ensure reliable operation in demanding industrial environments.

Conclusion

Dawopu Active Magnetic Bearings provide a cutting-edge solution for modern high-speed rotating machinery. By eliminating mechanical contact and using intelligent electromagnetic control, these systems offer unmatched efficiency, reliability, and operational performance.

With advanced design, precision manufacturing, and global industrial experience, Dawopu continues to deliver innovative bearing technologies that help customers achieve higher efficiency, lower maintenance costs, and longer equipment service life.