Liwei Song

Capital Medical University

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i-10 index

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Shumei Cui

Harbin Institute of Technology

Shaopeng Wu

Harbin Institute of Technology

Xiyuan Li

China Academy of Space Technology

Guangwu Wen

Shandong University of Technology

Zongze Cui

Harbin Institute of Technology

Qianfan Zhang

Harbin Institute of Technology

Qiwei Xu

Chongqing University

Weiduo Zhao

University of Nottingham Ningbo China

Cheng Shu-kang

Harbin Institute of Technology

Guo-Liang Zhao

China Academy of Engineering Physics

Cooperative Institutions

Harbin Institute of Technology

Chinese Academy of Sciences

Capital Medical University

Beijing Chest Hospital

University of Chinese Academy of Sciences

Heilongjiang Institute of Technology

Shanghai Jiao Tong University

Shanghai Institute of Optics and Fine Mechanics

Peking University

Huazhong University of Science and Technology

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Research of control system of linear electromagnetic oil-pumping unit based on DSP

International Conference on Electrical Machines and Systems (2005)

Liwei Song Xiaopeng Li Xie Gongcai Feng Lv

Disadvantages of traditional beam oil pumping units, such as long drive chain, bad controllability and low efficiency can be avoided by the novel oil pumping unit which can be achieved by eliminating the transmission devices, such as speed reducer and four bar linkage. A novel electromagnetic oil-pumping unit driven directly by linear motor was proposed in the paper. A control system of the nine phases brushless direct current linear oil pumping motor is presented in the paper. The paper presents a control system of nine phase linear oil pumping motor based on DSP, analyzes 4-4 phase change logic and 4-5 phase change logic, and gets the best way to reduce the molest during phase changing. Then PI speed and current controller is used to make the linear oil pumping motor working steadily and safely. The experiment indicates that the control system of the nine phase brushless direct current linear oil-pumping motor meets the design index, can make the oil pumping working steadily and safely.

10.1109/icems.2005.202629

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Design, fabrication and experiment of iron-core passive compulsator

International Conference on Electrical Machines and Systems (2008)

Shaopeng Wu Shumei Cui Liwei Song Manlan Liu

The paper presents design, fabrication and experiments of an iron-core, rotating field, two phases and modified non-salient pole rotor compulsator (compensated pulsed alternator), which is for comparison with air-core compulsator to be made in the near future. It includes parameters and special technics different from traditional generators. The decision of thickness of compensation shield is based on the simulation of eddy-current magnetic in the compensation shield.The paper also shows results of no-load and discharge experiment, which verify the capacity of enduring high pulsed current, high rotating stress and insulation strength for the iron-core passive compulsator.

Railgun

Source

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Citations (2)

Decoupling active and passive hybrid radial magnetic bearing

2021 International Conference on Control, Automation and Information Sciences (ICCAIS) (2015)

Shupei Li Liwei Song Jingyu Wang Size Li Xiaofei Lei

This paper proposes a DHRMB (decoupled hybrid radial magnetic bearing), which consists of a PRMB (passive radial magnetic bearing) and an ARMB (active radial magnetic bearing). The proposed DHRMB can simultaneously produce radial active controllable suspension force, radial passive suspension force and axial passive suspension force. In this paper, the structure and operating principle of DHRMB are firstly introduced. Using the PMAPM (permanent magnet affixed to a plane magnetizer), the axial force produced by PRMB is analyzed. After that, the mathematical model of radial suspension force calculation in ARMB is presented by means of equivalent magnetic circuit. Finally, the results from analytical and numerical calculation are compared. The results show that, the flux of each component: the flux from the PRMB, the active control flux and the permanent magnet bias flux from ARMB are decoupled. The analytical results agree well with the numerical calculation results.

Magnetic bearing

Decoupling (probability)

Magnetic Levitation

Suspension

Magnetic circuit

10.1109/iccais.2015.7338640

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Citations (1)

Study on Synchronization of Air-Core Compensated Pulsed Alternator Pairs

IEEE Transactions on Plasma Science (2018)

Shaopeng Wu Dong Xing Shumei Cui Liwei Song Weiduo Zhao

As a pulsed power supply, compensated pulsed alternator (CPA) has high power density and high energy density. In order to compensate the torque and gyroscopic effects during the discharge process and improve the ability of power supply, even number of similar counter-rotating alternators could be used, synchronously running in pairs and connecting in parallel to the load. However, there are unavoidable differences in parameters between machines, and this may result in a large difference between their discharge depth and discharge current waveforms and then cause the loss of life of some machines and rectifier devices as well as the decline of system output. Focusing on the synchronization of CPAs running in pairs, the factors that affect the synchronous operation of the machines are analyzed first. Then, the principle and characteristics of using different excitation circuit topologies to achieve synchronization are studied, and the limitations of such methods are pointed out. Finally, three active synchronization methods are proposed: excitation loop suppression (ELS), startup time regulation, and seed capacitor voltage regulation, hoping to make that the discharge depth tends to be the same and the difference of the discharge current amplitude to be in a small range. Simulation results show that all the three methods have good synchronization effect, and the effect of ELS is the best.

Alternator

Pulsed Power

Rectifier (neural networks)

10.1109/tps.2018.2877689

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Citations (2)

SOA software platform and its application

Information technology newsletter (2012)

Liwei Song

This paper has developed a software platform comformed with SOA standard with many business services and applied in a lot of software project,such as CNPC oil gas engineering technical service management system,office collaboration system and logistics management system,etc.Applying ePlanet to development a new software system can reduce 25%~50% time of system construction and enhance 40%~60% time of application integration.

System Integration

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The construction and simulation of V2G system in micro-grid

International Conference on Electrical Machines and Systems (2011)

Shumei Cui Liu Xiao-fei Dewen Tian Qianfan Zhang Liwei Song

Vehicle-to-Grid (V2G) technology has caught people's attention. Applications of V2G in general Power Grid face some challenges. It is complicated to control, in need of large amounts of EVs and hard to realize in the short term. In this paper V2G is applied to micro-grid and V2G system is constructed based on a parking lot. The structure is proposed in which bidirectional AC/DC and bidirectional DC/DC converters share one common DC bus, and also the coordination control strategy is given. Meanwhile this paper presents a general micro-source model as well as a V2G model. Simulation of voltage regulation and renewable energy support is conducted and results prove the availability of proposed structure and control strategy. The work is meaningful to the control and operation for micro-grid and V2G.

Vehicle-to-Grid

10.1109/icems.2011.6073378

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Citations (33)

Growth of nanowires from annealing SiBONC nanopowders

Journal of Crystal Growth (2006)

Feiran Li Guangwu Wen Liwei Song

Vapor–liquid–solid method

10.1016/j.jcrysgro.2006.01.049

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Citations (17)

Study on the Influences of an Outer-Coreless-Rotor Permanent Magnet Synchronous Machine Using Halbach Magnet Array

Energies (2024)

Cong Xu Hao Wu Yuchao Shi Ning Wang Liwei Song

In order to evaluate the influences of the topology design of a Halbach Magnet Array (HA) on the performance of a motor, a PMSM with an outer coreless rotor using a Halbach Magnet Array (HAORPMSM) is proposed in this article. The design parameters of the HA could be separated into dividing methods per pole, magnet thickness, and initial magnetization direction angle. The phase Back-EMF under constant mechanical speed is chosen as the index to measure the performance of the motor. To start with, different dividing methods of the HA are evaluated. After that, the influence of thickness considering the utilization of the magnet is studied. Lastly, the relationship between initial magnetization direction and motor manufacturing is represented. The results show that the HA design meets the optimized performance considering the balance of the amount of magnet usage and manufacturing when using specific HA parameters.

Halbach array

Electropermanent magnet

10.3390/en17133108

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Finite Element Method Modal Analysis of Driving Motor for Electric Vehicle

Proceedings of the CSEE (2011)

Liwei Song

Modal analysis is a technology for vibration characteristic research.It is the foundation for the structural dynamics analysis.Natural frequency is a very important performance in structural dynamics analysis.Modal characteristics of the electric vehicle(EV) driving motor were investigated by finite element method(FEM).FEM models for modal analysis were built for the stator winding,shell,end shield,rotor and shaft by appropriate structure simplification.The influences on natural frequencies of the motor were analyzed.Natural frequencies and mode shapes were simulated by FEM.The accuracy of the FEM analysis is validated by the modal analysis experiment of hammering method and the no-load noise spectrum analysis.

Natural frequency

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Adaptive Current Angle Compensation Control Based on the Difference in Inductance for the Interior PMSM of Vehicles

Energies (2024)

Liying Zhang Zongze Cui Tingchen Hou Rui Zhang Hao Wei

Achieving good performance in terms of a fast and accurate maximum torque per ampere (MTPA) control method depends on both accurate parameter estimation and a sophisticated control strategy. However, it often requires a complex and long computational process. This paper proposes an efficient control method using the relationship of torque and current angle for maximum torque per ampere control of the interior permanent magnet synchronous motor (IPMSM) for vehicle application. It was found that it is not necessary for the control method to determine the inductance in the d-q axes; the identification of the difference between each axis is enough. Furthermore, this paper presents a simple and effective procedure to estimate the difference in inductance online, where the linear iron loss calculation method is also designed to support the above process. The proposed control method was experimentally validated on a 5 kW prototype by a TMS320F28335 microcontroller and DSPACE synchronized with a personal computer. The results show that the control process has faster and more accurate performance than the conventional method.

10.3390/en17194905

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