Design and implementation of a five-phase six-leg switching power amplifier for five degrees of freedom magnetic levitation 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.

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A High-Performance Digital Servo Driver for Magnetic Levitation Planar Motor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.2113 ◽

2013 ◽

Vol 712-715 ◽

pp. 2113-2118

Author(s):

Li Gang Huo ◽

Yun Fei Zhou ◽

Guang Dou Liu

Keyword(s):

Power Amplifier ◽

High Performance ◽

High Efficiency ◽

Magnetic Levitation ◽

Fast Response ◽

Temperature Drift ◽

Current Feedback ◽

Pid Algorithm ◽

Switching Power ◽

Class D Amplifier

A new digital DC servo driver based on DSP and FPGA for planar motor was designed in this paper. Current feedback and digital self-tuning PID algorithm control strategy are applied. Switching power amplifier or class D amplifier is the choice of power amplifier. The most prominent characteristic of the servo driver used in planar motor is high efficiency, low temperature drift, small size, fast response, and high-bandwidth. Finally, the performance parameters and power loss parameters of the servo driver are given.

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One‐cycle decoupling control method of multi‐leg switching power amplifier for magnetic bearing system

IET Electric Power Applications ◽

10.1049/iet-epa.2018.5792 ◽

2019 ◽

Vol 13 (8) ◽

pp. 1204-1211

Author(s):

Chengzi Liu ◽

Zhiquan Deng ◽

Kexiang Li ◽

Jie Zhou

Keyword(s):

Power Amplifier ◽

Control Method ◽

Magnetic Bearing ◽

Decoupling Control ◽

Switching Power ◽

Bearing System

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Design and Implementation of Wideband Stacked Distributed Power Amplifier in 0.13- ${\mu }\text {m}$ CMOS Using Uniform Distributed Topology

IEEE Transactions on Microwave Theory and Techniques ◽

10.1109/tmtt.2017.2769053 ◽

2017 ◽

Vol 65 (12) ◽

pp. 5212-5222 ◽

Cited By ~ 8

Author(s):

Mohsin M. Tarar ◽

Renato Negra

Keyword(s):

Power Amplifier ◽

Distributed Power ◽

Design And Implementation

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Nonlinear Behavior of a Magnetic Bearing System

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.2814135 ◽

1995 ◽

Vol 117 (3) ◽

pp. 582-588 ◽

Cited By ~ 29

Author(s):

L. N. Virgin ◽

T. F. Walsh ◽

J. D. Knight

Keyword(s):

Degrees Of Freedom ◽

Initial Conditions ◽

Nonlinear Behavior ◽

Analytical Techniques ◽

Magnetic Bearing ◽

Forced Response ◽

The Mathematical Model ◽

Two Degree Of Freedom ◽

Sensitivity To Initial Conditions ◽

Bearing System

This paper describes the results of a study into the dynamic behavior of a magnetic bearing system. The research focuses attention on the influence of nonlinearities on the forced response of a two-degree-of-freedom rotating mass suspended by magnetic bearings and subject to rotating unbalance and feedback control. Geometric coupling between the degrees of freedom leads to a pair of nonlinear ordinary differential equations, which are then solved using both numerical simulation and approximate analytical techniques. The system exhibits a variety of interesting and somewhat unexpected phenomena including various amplitude driven bifurcational events, sensitivity to initial conditions, and the complete loss of stability associated with the escape from the potential well in which the system can be thought to be oscillating. An approximate criterion to avoid this last possibility is developed based on concepts of limiting the response of the system. The present paper may be considered as an extension to an earlier study by the same authors, which described the practical context of the work, free vibration, control aspects, and derivation of the mathematical model.

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