scholarly journals Optimization Research on a Switching Power Amplifier and a Current Control Strategy of Active Magnetic Bearing

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 34833-34841 ◽  
Author(s):  
Yaping He ◽  
Xi He ◽  
Jien Ma ◽  
Youtong Fang
Keyword(s):  
Power Amplifier ◽  
Control Strategy ◽  
Magnetic Bearing ◽  
Current Control ◽  
Active Magnetic Bearing ◽  
Switching Power ◽  
A Current

A New Realization Method of Control System for Magnetic Bearing

2010 ◽  
Vol 43 ◽  
pp. 32-35
Author(s):  
Wen Yue Zhang ◽  
Yan Jun Ge ◽  
Jun Yue Yang
Keyword(s):  
Control System ◽  
Power Amplifier ◽  
Control Strategy ◽  
Digital Signal Processor ◽  
Control Strategies ◽  
Digital Signal ◽  
Magnetic Bearing ◽  
Current Control ◽  
Common Control ◽  
The Difference

Aiming at the problems of complex circuit and parameter adjustment in traditional current type power amplifier of Magnetic Bearing (MB), a new realization method of control system based on DSP (Digital Signal Processor) is proposed. The difference with traditional power amplifier is that the current control loop is realized through software in DSP, so some advanced control strategies will be adopted easily, and the control parameters could be modified freely. Besides, the models established in MATLAB using common control strategy and advanced strategy are simulated separately, and the simulation results show the better effect can be obtained with the latter. Finally, the rotor of a 1-DOF MB prototype can be suspended within 0.01mm in the experiment, and the control strategy and parameters can be modified freely by software in DSP.

scholarly journals Evaluation of the Topology of Switching Power Amplifiers for Active Magnetic Bearings

Proceedings ◽  
2020 ◽  
Vol 64 (1) ◽  
pp. 25
Author(s):  
Yefa Hu ◽  
Kezhen Yang ◽  
Xinhua Guo ◽  
Jian Zhou ◽  
Huachun Wu
Keyword(s):  
Power Amplifier ◽  
Power Amplifiers ◽  
Comprehensive Evaluation ◽  
Magnetic Bearing ◽  
Bias Current ◽  
Magnetic Bearings ◽  
Active Magnetic Bearing ◽  
Active Magnetic Bearings ◽  
Switching Power ◽  
Bearing System

A switching power amplifier is a key component of the actuator of an active magnetic bearing, and its reliability has an important impact on the performance of a magnetic bearing system. This paper analyzes the topologies of a switching power amplifier of an active magnetic bearing. In the case of different coil pair arrangements and bias current distributions, comprehensive evaluation of the different topologies of switching power amplifiers is introduced. This evaluation has a guiding role in the design of a switching power amplifier of an active magnetic bearing.

Study of a Current Control Strategy Based on Multisampling for High-Power Grid-Connected Inverters With an LCL filter

2017 ◽  
Vol 32 (7) ◽  
pp. 5023-5034 ◽  
Author(s):  
Xing Zhang ◽  
Peng Chen ◽  
Changzhou Yu ◽  
Fei Li ◽  
Hieu Thanh Do ◽  
...  
Keyword(s):  
High Power ◽  
Control Strategy ◽  
Power Grid ◽  
Current Control ◽  
Lcl Filter ◽  
A Current

scholarly journals Mechanism Analysis of Eddy-Current Effects on Switching Power Amplifier of a Nonlaminated Magnetic Bearing

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 147112-147121
Author(s):  
Kexiang Li ◽  
Zhiquan Deng ◽  
Cong Peng ◽  
Gucai Pang ◽  
Lei Mei ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Eddy Current ◽  
Magnetic Bearing ◽  
Mechanism Analysis ◽  
Switching Power

An anti-windup control strategy to actuator saturating input voltage for active magnetic bearing system

2016 ◽  
Vol 35 (3) ◽  
Author(s):  
Avadh Pati ◽  
Richa Negi
Keyword(s):  
Control Strategy ◽  
Pid Control ◽  
Input Voltage ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Region Of Attraction ◽  
Control Scheme ◽  
Amb System ◽  
Voltage Saturation ◽  
Bearing System

Purpose The active magnetic bearing is highly nonlinear and unstable system. In general most of physical systems, conventional PID control strategies are employed for their stable operation but the dynamics of the system are influenced by input voltage saturation that degrades the performance of the system. The conventional PID control scheme does not work properly alone. In such a situation, PID faces windup phenomenon that leads to instability in the system. To overcome this problem, an anti-windup control scheme leads to stable and smooth operation of active magnetic bearing system. Design/methodology/approach The proposed anti-windup control strategy is based on dynamic output feedback that is applied on linearized active magnetic bearing (AMB) system to stabilize and avoid the input voltage saturation effect in the actuator. Findings An anti-windup controller is designed for active magnetic bearing system in presence of input voltage saturation. The stability of AMB system with anti-windup controller is derived in sense of Lyapunov and expressed as linear matrix inequality problem for AMB system and the designed anti-windup controller also enlarges the region of attraction of considered AMB system. Originality/value T-S fuzzy technique is used for obtaining local linear model of nonlinear active magnetic bearing system for easy and simple implementation of anti-windup control scheme. In proposed methodology the region of attraction for anti-windup compensator is also discussed. The effectiveness of proposed method is verified by the numerical simulation results for considered active magnetic bearing system and domain of attraction or stability region of closed loop AMB system are also calculated using Eigen Value Optimization technique for both the cases such as with and without anti-windup controller. The comparative result and the contribution of proposed control strategy are also discussed.

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