Key Technology
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Sensing Technology

Sensing technology with independent intellectual property rights, real-time control accurate rotor position information.

Inductive Sensor: Variable reluctance, ferromagnetic targeted (in general) and low cost.

Capacitive Sensor: Ignore oscillation principle, metal targeted (in general) and with the driving frequency of several MHZ.



Actuator Technology

Design based on the bearing load of the rotor, with optimum design of flux etc. to make it suitable for high speed system.




Signal Processing Technology

Develop an independent circuit board based on the DSP board of PC, power amplifiers and other electronic components, with the economy and security suitable for centrifugal machine.




Key Technology
Your present position: Home> TECHNOLOGY >Key Technology

AMB Introduction

It uses magnetic force to support rotor, so as to avoid the contact between the rotor and stator, eliminating the friction of the rotary shaft completely and enabling the rotor to obtain a high revolving speed and running accuracy. With features like low energy consumption, long life span, lubrication-free, low noise, maintenance-free, etc.,Magnetic Bearing system is especially applied to the high-speed, vacuum, ultra-clean and some other special circumstances. It's a new-type and high-tech device which is face to future-oriented and environmentally friendly.

Technical Principle

As illustrated in the picture, the rotor is fixed between two radial bearings and two thrust bearings. The rotor’s position is detected by the sensor and reflected to the signal processor in real time. When the rotor’s position shifts, the signal processor will adjust the magnetic forces of the actuators at the respective freedom degree of freedom according to the rotor’s position offset, so as to make the rotor back to the correct position.


Main Components

  • Actuator
  • Main Components
  • Sensor


1. What protection device does the magnetic bearing has when it encountered a sudden power failure?
The magnetic bearing has an UPS device. When it encountered a sudden power failure, the UPS device will provide the power to the magnetic bearing, pending rotor (motor) rotation speed gradually decreases until it stops.

2. What protection device does the magnetic bearing has when it encountered a sudden shutdown?
Magnetic bearing system installed auxiliary bearings at both ends. When it encountered a sudden shutdown, the rotor will first contact with the auxiliary bearings, it won’t contact with the magnetic bearings and stator directly.

3. The difference of magnetic bearing and air bearing.
Different gap
We use the active magnetic bearing,
it can be real-time controlled according to the operating status of the rotor. The magnetic bearing can be stable suspension from 0 to rated speed range, air bearings require a certain speed (usually 5000rpm or more).

4. About supportive contrast between the magnetic bearing and air bearing.
Air bearing: The designed suspension force is related to the rotor operating state (speed size), and the maximum load is small. Magnetic bearing: it can be automatically adjusted within the designed maximum range, including setting bearing damping and stiffness. Theoretical maximum bearing force without limit (can be applied to a wide range).