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RISS 인기검색어
- 검색키워드
- 저자 : Youguang Guo (검색결과 5 건)
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Design and Analysis of an Outer Mover Linear-Rotary Vernier Machine
Guo Kaikai,Guo Youguang 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.2
According to the requirements of large torque and high precision linear displacement of the drilling robot, an outer mover (OM) linear-rotary (LR) vernier machine (VM) is proposed with a special support mechanism, which combines an outer rotor VM and a cylindrical OM linear VM. In order to reduce the detent force and improve the displacement accuracy of the linear motion when the proposed motor works at low speed and short stroke conditions, the modular stators and permanent magnet poles are adopted instead of the traditional toroid structure. Since the torque is the main output quantity and the linear motion mainly determines the linear displacement, the design of the rotary unit is taken as the optimization objective fi rstly. Then, the cogging torque and detent force of OMLRVM are added to the optimization objectives. The electromagnetic and mechanical designs of the proposed motor are calculated based on 3-D fi nite element model. Compared with the results of the initial topologies I and II, the end eff ects of rotary and linear units are reduced thanks to the support mechanism, and the amplitudes of cogging torque and detent force are decreased. The idea of combined electromagnetic and mechanical design is an eff ective way to solve the practical application problems in industrial fi eld.
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Decoupling Control Analysis of a Flux Reversal Linear Rotary Permanent Magnet Actuator
Kaikai Guo,Youguang Guo,Jingzhao Li 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4
In order to meet the requirement of industrial production, a control system of a novel fux reversal linear rotary permanent magnet actuator (FR-LRPMA) is developed in this paper, and the electromagnetic and motion decoupled process is analyzed in detail. Firstly, the control equation of FR-LRPMA is derived in the nine phase stator coordinate system and dual dq-axis mover coordinate system. Then the control model of FR-LRPMA is built in MATLAB/Simulink using improved space vector pulse width modulation (SVPWM), and the linear, rotary and spiral motions of the proposed actuator are achieved. Finally, the prototype of the actuator is manufactured, and the experiment platform of FR-LRPMA is set up to measure the cogging torque and linear detent force, validating the simulation results. It is concluded that the control system of FR-LRPMA can be converted into two independent single freedom motors by dual dq transformation. The improved SVPWM is efective in the control system, and the method can be used to solve the electromagnetic and motion decoupling problems.
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Rongwei Guo,Chunying Zhu,Yaran Yin,Taotao Fu,Youguang Ma 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.75 No.-
The gas–liquid two-phaseflow and mass transfer performance of CO2 absorption into 2-amino-2-methyl-1-propanol (AMP) with ethylene glycol (EG) non-aqueous solution in a microchannel wereinvestigated under different gas–liquid two-phaseflow rates and AMP concentrations. A new correlationwas proposed for accurately predicting the liquid side volumetric mass transfer coefficient by consideringthe enhancement factor. It was verified that the volumetric mass transfer coefficient of CO2 absorption inthe microchannel is obviously higher than that in the traditional macroscopic column. Therefore, withthe usage of microchannel for AMP-EG non-aqueous solution, both low energy consumption and highefficient absorption could be reached.
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Islam, Md. Rabiul,Guo, Youguang,Zhu, Jian Guo Journal of International Conference on Electrical 2012 Journal of international Conference on Electrical Vol.1 No.2
Due to the variable nature of renewable energy resources and power demand by consumers, it is difficult to operate a power system installed with only one type of renewable energy resource. Grid-based renewable generation may be the only solution to overcome this problem. The conventional approach based on a low-voltage converter with power frequency transformer is commonly employed for grid connection of offshore renewable energy systems. Because of the heavy weight and large size of the transformer, the system can be expensive and complex in terms of installation and maintenance. In this paper, an 11-kV series connected H-bridge (SCHB) multilevel voltage source converter (VSC) is proposed to achieve a compact and light direct grid connection of renewable energy systems. This paper presents the design, simulation and analysis of a five level (5L)-SCHB and an eleven level (11L)-SCHB VSC for 11-kV grid-based renewable energy systems. The performance, cost, modulation scheme and harmonic spectra of the converter are analyzed.
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Design and analysis of mechanical flux‑weakening device of axial flux permanent magnet machines
Shaopeng Wang,Jiawei Lu,Bin Li,Chengcheng Liu,Youhua Wang,Gang Lei,Youguang Guo,Jianguo Zhu 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.4
Due to the low inductance of an axial flux permanent magnet machine (AFPMM), the constant power speed regulation range is small. A new mechanical flux-weakening method for single-rotor single-stator AFPMMs is proposed in this paper. By installing a mechanical flux-weakening device on one side of the stator and rotating it certain angle, the speed regulation of the flux-weakening can be realized. The device is simple in structure, easy to operate, and can be operated in the process of machine operation. The validity of the device is verified by applying it to a machine. Finite-element software is used to calculate and analyze the performances of two machines with the device.
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