System Model of Three-Level Switching Power Amplifier for Magnetic Bearing

Wang, Jun; Xu, Liang

doi:10.1109/icmtma.2009.467

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…Conversely, digital drive circuits exhibit comparatively lower power losses, which has spurred extensive research over decades to enhance their efficiency and performance [26], [29], [38], [70], [85]- [87]. A recurring challenge in digital drive circuits for AMB is the presence of pronounced current ripple [76], [77] . To mitigate this issue, the widely adopted recourse involves the implementation of a 3-level PWM scheme.…”

Section: Hybrid Amplifiersmentioning

confidence: 99%

Power Amplifiers and Their Feedback Mechanisms for AMB—A Comprehensive Review

Kamath,

G. S.,

Bekinal

et al. 2023

IEEE Access

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Active magnetic bearings (AMB) have gained significant attention in recent years due to their superior performance in various industrial applications. One crucial component of an AMB system is the discrete power amplifier, which plays a vital role in driving the magnetic coils and controlling the position and stability of the rotor. This article provides a comprehensive review of power amplifier technologies in combination with the H bridge converter and feedback sensing circuits used in AMB. In addition, it discusses the design considerations, operational principles, and performance metrics of power amplifiers. Finally, challenges and potential future directions in power amplifier technology for AMB along with conclusions are highlighted.

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Section: Hybrid Amplifiersmentioning

confidence: 99%

Power Amplifiers and Their Feedback Mechanisms for AMB—A Comprehensive Review

Kamath,

G. S.,

Bekinal

et al. 2023

IEEE Access

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“…Therefore, it has been extensively used in the AMB system. According to the switching control strategy of pulse-width modulation (PWM), switching power amplifiers can be divided into two-state amplifier [10] and three-state amplifier [11][12][13]. However, two types of power amplifiers have a common problem of current ripple noise due to the conduction and shutoff operation of power switch components.…”

Section: Introductionmentioning

confidence: 99%

“…Schematic drawing of online current de-noising for switching power amplifier decomposition level are selected as N = 64 and m = 4, respectively. In addition, the parameters of proposed threshold function in(13) are given as n = 10, β 1 = 1.12, β 2 = 0.95, β 3 = 0.90, and β 4 = 0.90.In this paper, three important aspects, including the coil current, rotor displacement, and vibration force, are taken as the performance indexes of interest. For simplicity, and without loss of generality, only the results of x-axis are analysed here, and the results of the rest are the same as that of x-axis.…”

mentioning

confidence: 99%

Online current signal de‐noising of magnetic bearing switching power amplifier based on lifting wavelet transform

Zhang

Fang

2016

IET Electric Power Applications

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Switching power amplifier is an essential component for magnetic bearing system. However, the current ripple resulted from the conduction and shutoff operation of power switch component inevitably affects the performance of active magnetic bearing. To reduce the current ripple of switching power amplifier, the characteristics of current ripple are first analysed. In response to the spectrum character of current ripple, an online lifting wavelet transform denoising algorithm, unlike the conventional power filter circuit, is proposed in this study. Moreover, the sliding data window and an improved threshold function are introduced to realise the feasibility of online processing and to improve the de-noising performance, respectively. Finally, plentiful comparative experiments, taking the magnetically suspended flywheel as subject, are implemented. The results illustrate that the proposed algorithm could dramatically reduce the current ripple and that the rotor displacement jitter and the vibration force are suppressed accordingly.

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