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Precise methods for conducted EMI modeling,analysis,and prediction

science China(Technological sciences) 2008年第6期51卷 641-655页

作者： MA WeiMing ZHAO ZhiHua MENG Jin PAN QiJun ZHANG Lei National Key Laboratory for Ship Integrated Power System Technology Naval University of EngineeringWuhan 430033China

Focusing on the state-of-the-art conducted EMI prediction, this paper presents a noise source lumped circuit modeling and identification method, an EMI modeling method based on multiple slope approximation of switching transitions, and dou-ble Fourier integral method modeling PWM conversion units to achieve an accurate modeling of EMI noise source. Meanwhile, a new sensitivity analysis method, a general coupling model for steel ground loops, and a partial element equivalent circuit method are proposed to identify and characterize conducted EMI coupling paths. The EMI noise and propagation modeling provide an accurate prediction of conducted EMI in the entire frequency range (0―10 MHz) with good practicability and generality. Finally a new measurement approach is presented to identify the surface current of large dimensional metal shell. The proposed analytical modeling methodology is verified by experimental results.

关键词： EMC conducted EMI modeling and prediction sensitivity ground impedance

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Precise mutual-inductance analysis of a novel clasp rogowski coil with symmetrical double-printed imprints

Precise mutual-inductance analysis of a novel clasp rogowski...

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2012 6th International Conference on Electromagnetic Field Problems and Applications, ICEF'2012

作者： Tao, Tao Zhao, Zhihua Ma, Weiming Pan, Qijun National Key Laboratory for Vessel Integrated Power System Technology Naval University of Engineering China

ISBN: (纸本)9781467313353

A novel clasp PCB Rogowski coil with the symmetrical double-printed imprints and returning turn is proposed. The mutual-inductance between the coil and the primary conductor is precisely analyzed as the accuracy and sensitivity parameter. The calculation and measurement of mutual-inductance have been made under different disturbed conditions, including the position error of the primary conductor, the existence of external interference currents. The results indicate the clasp PCB Rogowski coil is good in compatibility, accurate and steady in mutual-inductance. © 2012 IEEE.

关键词： Inductance

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A Dynamic model for inertia energy stored generator with rectifier system

A Dynamic model for inertia energy stored generator with rec...

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International Conference on Electrical Machines

作者： Guo, D.H. Ma, W.M. National Key Laboratory for Vessel Integrated Power System Technology Naval University of Engineering China

ISBN: (纸本)9781424441754

Due to diode elements, inertia energy stored generator with rectifier system possess the characteristic of nonlinearity, which cause great difficulty in analyzing systematic performance. In this paper, The inertia energy stored generator is modeled based on the fact that subtransient electric motive force (EMF) maintain constant during commutation process, and the uncontrollable rectifier system is also modeled based on state space averaging method. Both of which provide an effective model for systematic analysis. ©2010 IEEE.

关键词： Dynamic models

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A flexible hardware architecture for slave device of I2C bus

A flexible hardware architecture for slave device of I2C bus

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2019 International Conference on Electronic Engineering and Informatics, EEI 2019

作者： Liu, Cang Meng, Qingyun Liao, Tao Bao, Xianqiang Xu, Chengcheng National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9781728140766

I2C module is one of the most vital components in lots of chips. A flexible hardware architecture for slave device of I2C protocol is designed in this paper. The designed hardware architecture is divided into two levels: protocol level and application level. The protocol level implements the basic operations of I2C protocol, and the application level, which bases on the protocol level aiming to the demand of various applications. When complete the implementation and simulation of the designed hardware architecture, a verification platform is built to verify the performance of the designed hardware architecture. © 2019 IEEE.

关键词： Simulation platform

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Influence of Wound Stress on Magnetic Property of Toroid Sample

Influence of Wound Stress on Magnetic Property of Toroid Sam...

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2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020

作者： Xiong, Youxing Wang, Yu Yu, Xiwen Chen, Junquan Wang, Dong National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9781728152158

Nowadays, wound stress of toroid sample is usually ignored, when its magnetic properties are measured. However, it does harm to magnetization property, and increase the iron loss. According to our studies, wound stress can cause a 20% increase to iron loss of FeCoV alloy at 400Hz1000Hz. The influence of wound stress on electrical resistivity of FeCoV alloy is about 1%, and stress is less likely to cause a significant change in classic eddy current loss component. Iron loss increases with wound stress because the static hysteresis loss and excess loss increase with wound stress. Short motor is more sensitive to the wound stress than long motor. © 2020 IEEE.

关键词： Iron alloys

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Feasibility Analysis of Superconducting MHD Propeller for vessel Propulsion

Feasibility Analysis of Superconducting MHD Propeller for Ve...

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2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020

作者： Wang, Yu Yu, Xiwen Xiong, Youxing Huang, Wen Chen, Junquan National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9781728152158

In this paper, mathematical models for three types of MHD propeller are built. And they are used to achieve the most efficient propeller with the given design constraints. Based on the design result and current status of practical magnet technology, we can infer that it is very difficult for these three types of MHD propeller to be used practically. © 2020 IEEE.

关键词： Superconducting magnets

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A Novel Five-Level Carrier Phase Disposition Modulation Method for Parallel Three-Level Inverters Considering Circulating Current Suppression 2

A Novel Five-Level Carrier Phase Disposition Modulation Meth...

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2nd IEEE China International Youth Conference on Electrical Engineering, CIYCEE 2021

作者： Li, Zhongrui Nie, Ziling Ai, Sheng Xu, Jie Naval University of Engineering National Key Laboratory of Science and Technology on Vessel Integrated Power System Wuhan430033 China

ISBN: (纸本)9781665400640

Parallel operation of three-level inverters is an effective approach to achieve larger motor drive power. The interleaved operation can improve current distortion, but high-frequency circulating current inevitably emerges, reducing the power capacity and reliability of the system. To suppress circulating current, this paper proposes a five-level carrier phase disposition modulation method for parallel three-level inverters. Based on the carrier phase disposition modulation, the parallel three-level system can operate as a five-level inverter, and the pulse distribution is realized through the system state machine, which avoids complicated mathematical calculation. The simulation results verify that, compared with the interleaved operation, the proposed scheme has superior performance in term of circulating current suppression without increasing the output current harmonic. © 2021 IEEE.

关键词： Modulation

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Anomaly Detection Method of Segment-powered Linear Induction Motor Based on AE-GAN 3

Anomaly Detection Method of Segment-powered Linear Induction...

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3rd International Conference on Intelligent Computing and Human-Computer Interaction, ICHCI 2022

作者： Huang, J.J. Xu, X.H. Cui, X.P. Yang, H.X. National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9781510661301

Segment-powered linear motors(SLM) have high reliability, unbalanced operating data samples and few abnormal samples, making it difficult to detect anomalies through supervised classification models. Therefore, we propose an anomaly detection method based on the reconstruction model, which uses the difference between small reconstruction error of normal samples and large reconstruction error of abnormal samples to detect anomalies. Meanwhile, in order to make the reconstruction model better reconstruct the input samples, this paper introduces adversarial regularization to improve the training effect. The proposed model uses normal samples for training, and unknown state samples for testing. The anomaly score is obtained through the reconstruction error between the input sample and the reconstructed sample, so as to judge whether the input sample is abnormal. Experiments are carried out on the actual operation data of the SLM, which proves the effectiveness of the proposed method in the anomaly detection task of the SLM. © 2023 SPIE.

关键词： Linear motors

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Three-Phase Three-Level Phase-Shifted PWM DC-DC Converter for Electric Ship MVDC Application

Three-Phase Three-Level Phase-Shifted PWM DC-DC Converter fo...

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作者： Yang, Guorun Xiao, Fei Fan, Xuexin Wang, Ruitian Liu, Jilong National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

A three-phase three-level phase-shifted pulsewidth modulation (PSPWM) dc-dc converter is proposed for electric ship medium-voltage direct current application. Output voltage is controlled by incorporating PSPWM. Gate signals of each phase are phase shifted by {2\pi } / {3} from each other. This results in a decrease in output voltage ripple. Major features of the converter include: 1) good dynamic performance under low switching frequency;2) fault tolerance capability;and 3) plug and play capability. In order to obtain behavioral and performance characteristics of the proposed converter, detailed analytical and hardware in loop simulation studies are carried out. Finally, the viability of the scheme is confirmed through detailed experimental studies on a MW level, 1-kHz prototype developed for the purpose. © 2013 IEEE.

关键词： DC-DC converters

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A Modular Multi-port Converter for Distribution of vessel integrated power system

A Modular Multi-port Converter for Distribution of Vessel In...

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International Conference on Wireless power Transfer, ICWPT 2022

作者： Huang, ZhaoJie Ren, Qiang Xiao, Fei Liu, JiLong Zhu, ZhiChao National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9789819906307

The second generation medium voltage integrated power system (IPS) has a broad application prospect in future vessels. With the increase in the diversification of power-using equipment, the traditional unidirectional two-port converter could no longer meet the application requirements of the new generation IPS. Therefore, this paper discusses the application of MMC-based multi-port converter in vessel IPS by combining modular multilevel converter (MMC), dual active bridge (DAB) technology, and the input-series output-parallel concept. The converter can connect medium voltage DC bus, medium-voltage AC bus, and low-voltage DC power bus, and the introduction of DAB power channels can effectively suppress the inherent voltage fluctuation of MMC. The fundamental principle of the converter are introduced. A simple and feasible decoupling control method is proposed for the power channels composed of DAB. Finally, the function of the module multi-port converter and the feasibility of the control strategy are verified by simulation. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Electric power distribution

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