The Application Design of Inductance Sensor in Active Magnetic Bearing

2013 ◽  
Vol 364 ◽  
pp. 257-261 ◽  
Author(s):  
Wen Tao Yu ◽  
Hong Wei Li ◽  
Shu Qin Liu ◽  
Yun Peng Zhang
Keyword(s):  
Design Research ◽  
Magnetic Levitation ◽  
Design Method ◽  
Low Cost ◽  
High Sensitivity ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Electromagnetic Environment ◽  
Sensor Structure ◽  
Inductance Sensor

The sensor is an important part of the active magnetic bearing system, which directly affects the performance of the entire system. Compared with the eddy current sensor, inductive sensor has the advantages of low cost, high sensitivity, and is not sensitive to the electromagnetic environment; Influenced by the ambient temperature is small. In this paper, design research from two aspects of the sensor structure and circuit, and the sensor was tested and successfully used in maglev blower. This sensor design method can also be applied on other active magnetic bearings, such as magnetic levitation heart pumps, etc.

The Design Research of Inductance Sensor in the AMB Rotor System

2014 ◽  
Vol 602-605 ◽  
pp. 1463-1467
Author(s):  
Wen Tao Yu ◽  
Hong Wei Li ◽  
Shu Qin Liu
Keyword(s):  
Design Research ◽  
Simulation Analysis ◽  
Low Cost ◽  
High Sensitivity ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Current Sensor ◽  
Electromagnetic Environment ◽  
Sensor Structure ◽  
Inductance Sensor

The sensor is an important part of the active magnetic bearing system, which directly affects the performance of the entire system. Compared with the eddy current sensor, inductive sensor has the advantages of low cost, high sensitivity, and is not sensitive to the electromagnetic environment; Influenced by the ambient temperature is small. In this paper, design research from two aspects of the sensor structure and circuit, and the sensor was simulation analysis, which laid the foundation in the application of magnetic bearing systems.

Vibration Mitigation of Rotors Suspended on Low-Cost Hybrid Gas Foil Bearing

2019 ◽  
Author(s):  
Kamal Kumar Basumatary ◽  
Karuna Kalita ◽  
Sashindra K. Kakoty ◽  
Seamus D. Garvey
Keyword(s):  
High Speed ◽  
Low Cost ◽  
Current Source ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Electromagnetic Actuators ◽  
Manufacturing Method ◽  
Foil Bearings ◽  
Foil Bearing ◽  
Small Series

Abstract The hybrid Gas Foil Bearings combining the Gas Foil Bearing and Active Magnetic Bearing is a possibility for application in high-speed turbomachinery and a few developments have been made in this context. As such, the cost of conventional Gas Foil Bearing increases due to its requirement of precise manufacturing method and the coating material for the top foil and bump foil. In case of Active Magnetic Bearing, the normal electrical arrangement includes a multiplicity of independently controlled current sources usually at least four drives per bearing which increases its cost. Therefore, the hybrid Gas Foil Bearing will have much higher cost. In this work, a new electrical arrangement for the electromagnetic actuators of the hybrid Gas Foil Bearing has been proposed. The new arrangement requires only two drives per bearing and the bias current has been provided (in the same set of windings) through a simple rectifier with small series choke and shunt capacitor. As the number of drives required is less, the proposed bearing will have low cost. Implementing the new approach, the force vectors are achieved using only two current-source drives whereas the usual conventional arrangement requires four such drives. Numerical simulations are performed to explore the capabilities of the low cost bearing.

scholarly journals Design and Research of Industrial Permanent Magnetic Bearing

2011 ◽  
Vol 1 ◽  
pp. 140-144 ◽  
Author(s):  
Gang Zhang ◽  
De De Jiang ◽  
Jian Zhang ◽  
Xue Zhang ◽  
Ming Yan Li ◽  
...  
Keyword(s):  
Industrial Design ◽  
Mechanical Characteristics ◽  
Simple Structure ◽  
Magnetic Levitation ◽  
Low Cost ◽  
Magnetic Bearing ◽  
Design Concept

Because of that the permanent magnetic bearing (PMB) has the advantage of no wear, low cost and simple structure, the industrial design concept of PMB has been put forward in this paper. Radial and axial permanent magnetic levitation technology has been studied, and the aforementioned design is done based on these two kinds of technologies. During the experiments on the mechanical characteristics of PMBs, the capacity and stiffness of the bearings are researched.

Optimization of Eight Pole Radial Active Magnetic Bearing

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
K. P. Lijesh ◽  
Harish Hirani
Keyword(s):  
Numerical Optimization ◽  
Magnetic Levitation ◽  
Constraint Equation ◽  
Magnetic Bearing ◽  
Geometric Constraints ◽  
Active Magnetic Bearing ◽  
Iron Losses ◽  
The Given ◽  
Magnetic Levitation Force ◽  
Electromagnetic Bearing

In the current paper, studies carried out to design an eight pole electromagnetic bearing have been presented. The magnetic levitation force, accounting the copper and iron losses, was maximized for the given geometric constraints. Derivation of winding constraint equation in terms of wire diameter, number of turns, and dimensions of pole has been presented. Experiments were conducted to establish the constraints related to temperature rise. Finally, the dimensions of the electromagnet for maximizing the force obtained using numerical optimization have presented.

Research on Power Amplifier for AMB Based on DSP

2012 ◽  
Vol 150 ◽  
pp. 217-220
Author(s):  
Jian Sheng Zhang ◽  
Da Jun Jiang
Keyword(s):  
Neural Network ◽  
Control System ◽  
Power Amplifier ◽  
Electromagnetic Force ◽  
Design Method ◽  
Rbf Neural Network ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
System A ◽  
Neural Network Algorithm

Active Magnetic Bearing (AMB), which supports freely a rotor by using controllable electromagnetic force, have a lot of advantages such as adjustable stiffness and damp that the traditional bearings can’t compare with. Power Amplifier is an important part of AMB Control System. It can magnify or convert the control signal which can’t drive the electromagnetic iron actuators directly into a power signal. Hence, the performance of power amplifier plays a crucial role in the technique capability of control system. A design method of the PWM Power Amplifier was introduced through the research of the power Amplifier, and hence the CNC fault diagnoses are realized by RBF neural network algorithm and program.

scholarly journals The Stability of Magnetic Levitation Milling System Based on Modal Decoupling Control

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Xiaoli Qiao ◽  
Xiaoping Tang
Keyword(s):  
High Speed ◽  
Stability Region ◽  
Magnetic Levitation ◽  
Coupling Effect ◽  
Magnetic Bearing ◽  
Decoupling Control ◽  
Active Magnetic Bearing ◽  
High Speed Milling ◽  
Milling Stability ◽  
The Stability

Milling stability not only reduces the surface quality of the workpiece but also seriously restricts the high-speed development of CNC machine tools. The electric spindle rotor system with the active magnetic bearing has a strong gyro coupling effect, and with the increasing rotor speed, it will become a major unfavorable factor for the stability of the system during high-speed milling. The strong gyro coupling effect makes the stability region narrow at the time of high-speed milling. So, a modal decoupling control method that can reduce the effects of the gyro effect on the magnetic levitation milling system under high-speed milling is proposed. The effects of the gyro coupling of the magnetic bearing rotor on the milling stability region before and after the decoupling control are studied, which show that the modal decoupling control technology can reduce the effects of the gyro effect on the magnetic levitation milling system.

Adaptive hybrid control of unbalanced vibrations of a rotor/active magnetic bearing system with coupling misalignment using low cost instrumentation

2019 ◽  
Vol 25 (15) ◽  
pp. 2151-2174
Author(s):  
Rajiv Kumar Vashisht ◽  
Qingjin Peng
Keyword(s):  
Hybrid Control ◽  
Frequency Estimation ◽  
Low Cost ◽  
Active Noise Control ◽  
Notch Filter ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Flexible Rotor ◽  
Adaptive Notch Filter ◽  
Bearing System

An adaptive hybrid controller is proposed for reducing the unbalanced vibration response of a flexible rotor/active magnetic bearing system. It is observed that conventional adaptive feedforward controller (AFFC) normally used in the active noise control is very sensitive in performance for changes in rotor spin frequencies. Although frequency updating is a part of its architecture, a small practical variation in the rotor spin frequency can reduce its effectiveness drastically. A smart combination of adaptive notch filter and Goertzel filter is proposed for the frequency estimation. During changes of the rotor spin frequency, fundamental harmonics of the flexible rotor are excited. By using hybrid controllers that combine feedback control and AFFC, the amplitude of these fundamental harmonics is reduced significantly. By applying the multi-harmonic hybrid control, the multiple harmonics generated due to coupling misalignment are compensated efficiently. Fourier transform of the control signal is further used to detect the presence of the coupling misalignment.

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