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Neural Network aided PMSM multi-objective design and optimization for more-electric aircraft applications

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Chinese Journal of Aeronautics 2022年第10期35卷 233-246页

作者： Yuan GAO Tao YANG Serhiy BOZHKO Pat WHEELER Tomislav DRAGICEVIC chris gerada Power Electronics Machines and Control GroupUniversity of NottinghamNottingham NG72RDUK Department of Electrical Engineering Technical University of DenmarkKgs.Lyngby 2800Denmark

This study uses the Neural Network(NN)technique to optimize design of surfacemounted Permanent Magnet Synchronous Motors(PMSMs)for More-Electric Aircraft(MEA)*** key role of NN is to provide dedicated correction factors for the analytical PMSM mass and loss estimation within the entire design *** on that,a globally optimal design can be quickly *** the analytical estimation with Finite-Element Analysis(FEA)is the main research target of training the *** analytical formulae serve as the basis of this study,but they are prone to loss accuracy(especially for a large design space)due to their assumptions and *** the help of the trained NNs,the analytical motor model can give an estimation as accurate as the FEA but with super less time during the optimization *** Average Correction Factor(ACF)approach is regarded as the comparison method to demonstrate the excellent performance of the proposed NN ***,a NN aided three-stage-sevenstep optimization methodology is ***,a Pole-10-Slot-12 PMSM case study is given to demonstrate the feasibility and gain of the NN aided multi-objective optimization *** this case,the NN aided analytical model can generate one motor design in 0.04 s while it takes more than 1 min for the used FEA model.

关键词： Design and optimization Loss estimation Mean Length per Turn(MLT) More-Electric Aircraft(MEA) Neural Network(NN) Permanent Magnet Synchronous Motor(PMSM)

A fault tolerant single sided matrix converter for flight control actuation systems

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第11期13卷 866-874页

作者： Xiao-yan HUANG Mao-jing JIY Jian-cheng ZHANG Qin-fen LU You-tong FANG Andrew GOODMAN chris gerada College of Electrical Engineering Zhejiang University Hangzhou 310027 China High Technology Research and Development Center Ministry of Science and Technology Beijing 100044 China University of Nottingham Nottingham NG72RD UK

We describe a single sided matrix converter (SSMC) designed for safety critical applications like flight control actuation systems. Dynamic simulations of multi-phase SSMC using Matlab Simulink are carried out to evaluate the fault tolerance capabilities. Investigation into different numbers of phases and power converter topologies under single phase open circuit, single switch open circuit, and single switch short circuit has been executed. The simulation results confirm 5-phase SSMC design as a compromise between fault tolerance and converter size/volume. A 5-phase SSMC prototype was built. Experimental results verify the effectiveness of our design.

关键词： Single sided matrix converter Fault tolerance Flight control actuation systems

Control-Based Stabilization of DC Microgrid for More Electric Aircraft

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Transactions of Nanjing University of Aeronautics and Astronautics 2021年第5期38卷 737-746页

作者： YANG Jiajun BUTICCHI Giampaolo GU Chunyang WHEELER Pat ZHANG He gerada chris Key Laboratory of More Electric Aircraft Technology of Zhejiang Province University of Nottingham Ningbo ChinaNingbo 315000P.R.China Power Electronics Machines and Control GroupUniversity of NottinghamNottingham NG72RDU.K.

Electrifying the on-board subsystems of aircraft becomes an inevitable process as being faced with the environmental pollution,along with the proposed concept called more electric aircraft(MEA).With the increasing number of on-board power electronic based devices,the distribution system of the aircraft can be regarded as an onboard *** it is known that the load power electronic converters can exhibit constant power load(CPL)characteristics and reduce the system stability,it is necessary to accurately predict and enhance the system stability in designing *** paper firstly analyzes the stability of an on-board DC microgrid with the presence of ***,discusses the reasons behind instability and proposes a control strategy to enhance system ***,the simulation results are worked out to validate the analysis and the effect of the proposed control strategy.

关键词： DC microgrid stability analysis impedance model constant power load more electric aircraft dual active bridge converter permanent magnet synchronous generator

Magnetic Field and Radial Force Analysis of Six-Phase Rotary Machine

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Guidance,Navigation and Control 2022年第03期 48-62页

作者： Ziwei Dong Liang Yan chris gerada School of Automation Science and Electrical Engineering Beihang University Science and Technology on Aircraft Control Laboratory Beihang University Ningbo Institute of Technology Beihang University Department of Electrical and Electronic Engineering University of Nottingham

Six-phase permanent magnet synchronous machine and the control system are also widely used in industry, precision instruments and aerospace. However, most PMSMs employ magnet patterns either in alternatively radial magnetization or Halbach array, which may constrain the performance improvement in a certain degree. Therefore, a novel six-phase trapezoidal Halbach magnet array(THMA) is proposed in this paper. Six-phase permanent magnet synchronous machines(PMSMs) can reduce the harmonic components of magnetic flux in air gap, and decrease the iron loss and electromagnetic vibration caused by harmonic torque. Thus, it helps to improve the working efficiency and depress the torque ripple of the electrical machine. Dual three-phase windings are employed for the stator design to further improve the power density and reliability of the machine. Six-phase vector model of the machine is built based on dual dq control. It can minimize the electric coupling, magnetic coupling and thermal coupling. The radial electromagnetic force of the machine under load or no load is extracted, then the harmonic decomposition of the radial electromagnetic force for the spatial with time Fourier decomposition is carried out to obtain the force amplitude of different orders which is conducive to analyze the vibration characteristics of the machine.

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