The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
T A Lipo - One of the best experts on this subject based on the ideXlab platform.
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high Power Factor vernier permanent magnet machines
IEEE Transactions on Industry Applications, 2014Co-Authors: T A LipoAbstract:Vernier permanent-magnet (VPM) machines are well known for high torque density but Low Power Factor. This paper deals with the Low Power Factor of VPM machines. The goal is not obtained by reducing the electrical loading or adjusting current advance angle but by proposing a novel vernier topology, i.e., a dual-stator spoke-array (DSSA) VPM topology. In this paper, the characteristics of the DSSA VPM topology, such as active part, auxiliary mechanical structure, and rotor anisotropy, are analyzed in detail. Performances are evaluated based on finite-element analysis, including Power Factor, torque density, and cogging torque. The results show that the DSSA VPM topology exhibits high Power Factor, viz., ~0.9, and significantly high torque capability. The verification of the mechanical structure scheme is also done in this paper. Finally, theoretical analyses are validated by the experimental results by a 44-rotor pole 24-slot DSSA VPM prototype.
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high Power Factor vernier permanent magnet machines
Energy Conversion Congress and Exposition, 2013Co-Authors: T A LipoAbstract:Vernier permanent magnet (VPM) machines are well known for high torque density but Low Power Factor. This paper deals with the Low Power Factor of VPM machines. The goal is not obtained by reducing the electrical loading or adjusting current advance angle but proposing a novel vernier topology-dual-stator, spoke-array (DSSA) VPM topology. In this paper, the characteristics, such as active part, auxiliary mechanical structure and rotor anisotropy, of the DSSA VPM topology are analyzed in detail. Performances, including Power Factor, torque density, and cogging torque etc., are evaluated based on finite element analysis (FEA). The analysis results show that the DSSA VPM topology exhibits high Power Factor viz.,~0.9 and significantly high torque capability. Finally, the prototype machine has been designed, built, and is under testing. The verification of the mechanical structure scheme is done in this paper, and the experimental results will be presented in the near future.
M. A. H. Rasid - One of the best experts on this subject based on the ideXlab platform.
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A Novel and Simple Torque Ripple Minimization Method of Synchronous Reluctance Machine Based on Torque Function Method
IEEE Transactions on Industrial Electronics, 2021Co-Authors: Daniel Depernet, Vincent Lanfranchi, Khadija Ei Kadri Benkara, M. A. H. RasidAbstract:Synchronous reluctance machine (SynRM) has been studied widely in order to reduce its high torque ripple and improve its Low Power Factor. This article proposes a torque ripple reduction method for SynRM by defining a novel parameter-torque function. With the help of torque function, the optimal currents aiming to compensate torque harmonics are obtained. The advantage of the proposed method is that torque function can be obtained easily and torque ripple reduction can be achieved by a simple control method. For the purpose of verifying the proposed method, both simulations and experiments are performed. Finally, the influence of Power supply and parameter uncertainty on the proposed method has also been discussed.
Ping Zheng - One of the best experts on this subject based on the ideXlab platform.
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Investigation of the Power Factor of Magnetic-Field Modulated Brushless Double-Rotor Machine
IEEE Transactions on Power Electronics, 2021Co-Authors: Jingang Bai, Jiaqi Liu, Guopeng Liu, Yong Liu, Ping ZhengAbstract:The magnetic-field modulated brushless double-rotor machine (MFM-BDRM), getting rid of brush and slip ring, is a preferable selection for the Power splitting device in hybrid electric vehicles. In practical application, however, the MFM-BDRM is facing the challenge of Low Power Factor owing to its special operating principle—the magnetic field modulation principle. Although some researchers dedicate themselves to improving the Power Factor of MFM-BDRM, the cause of Low Power Factor in the MFM-BDRM is still not clear. This article will investigate the Power Factor problem of MFM-BDRM, systematically. First, the inductance feature of MFM-BDRM based on the magnetic field modulation principle is investigated. Second, the fundamental cause of the Low Power Factor of MFM-BDRM is analyzed. Furthermore, three feasible attempts are made and investigated to improve the Power Factor of MFM-BDRM. Finally, a prototype of MFM-BDRM is manufactured, and parts of the analysis are verified by experiments.
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Flux leakage analysis of transverse-flux PM linear machine
2014 17th International Conference on Electrical Machines and Systems (ICEMS), 2014Co-Authors: Bin Yu, Bing Xu, Ping Zheng, Jing ZhangAbstract:A novel cylindrical transverse-flux permanentmagnet linear machine (TFPMLM) is proposed in this paper. It aims to solve the problems of high flux leakage and Low Power Factor existing in the traditional TFPMLM, with good manufacturability. As the main reason of Low Power Factor, the flux leakage of transverse flux machine is investigated. The flux leakages of different schemes are compared. A favorable scheme is achieved.
M. Santosh - One of the best experts on this subject based on the ideXlab platform.
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Series Compensation Technique for the Synchronization of Grid Voltage with DG System under Fault Condition
International Journal of Research, 2016Co-Authors: Rsrujan Kumar, M. SantoshAbstract:The use of series capacitors is to reduce the voltage drop in the lines with Low Power Factor and improve the voltage at the receiving end particularly with Low Power Factor loads. For variable load conditions, the voltage can be controlled by switching in suitable series capacitors in the line. Series compensation is defined as insertion of reactive Power elements into transmission lines and provides the folLowing benefits are reduce the voltage drops, increases the system response, stability and efficiency also increases the transfer capabilities.In order to achieve satisFactory results with such systems, it is necessary to count on accurate and fast grid voltage synchronization algorithms, which are able to work under unbalanced and distorted conditions. This project analyzes the synchronization capability of three advanced synchronization systems: the decoupled double synchronous reference frame phase-locked loop (PLL), the dual second order generalized integrator PLL, and the three-phase enhanced PLL, designed to work under such conditions. Although other systems based on frequency-locked loops have also been developed, PLLs have been chosen due to their link with dq0 controllers. The simulation results are presented by using Mat lab/Simulink software.
M Srinivas - One of the best experts on this subject based on the ideXlab platform.
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Series Compensation Technique for Grid voltage Synchronization for Distributed Generated System
International Journal of Research, 2016Co-Authors: G Bala Chandraiah, M SrinivasAbstract:The use of series capacitors is to reduce the voltage drop in the lines with Low Power Factor and improve the voltage at the receiving end particularly with Low Power Factor loads. For variable load conditions, the voltage can be controlled by switching in suitable series capacitors in the line. Series compensation is defined as insertion of reactive Power elements into transmission lines and provides the folLowing benefits are reduce the voltage drops, increases the system response, stability and efficiency also increases the transfer capabilities. In order to achieve satisFactory results with such systems, it is necessary to count on accurate and fast grid voltage synchronization algorithms, which are able to work under unbalanced and distorted conditions. This project analyzes the synchronization capability of three advanced synchronization systems: the decoupled double synchronous reference frame phase-locked loop (PLL), the dual second order generalized integrator PLL, and the three-phase enhanced PLL, designed to work under such conditions. Although other systems based on frequency-locked loops have also been developed, PLLs have been chosen due to their link with dq0 controllers. The simulation results are presented by using Mat lab/Simulink software.
