The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform

Ji Young Lee - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Transverse Flux Rotary Machines with Different Stator Core Topologies
    Journal of Magnetics, 2014
    Co-Authors: Ji Young Lee, Dae-hyun Koo, Shi-uk Chung, Choong-kyu Han
    Abstract:

    The objective of this paper is to provide a comparison between two transverse flux rotary machines (TFRM) with different topologies of Stator Cores. Depending on how to make Stator core with laminated steel sheets, the one topology is ‘perpendicular stacking core’ and the other is ‘separated core.’ Both of the two Cores have been designed considering 3-dimensional (3-D) magnetic flux path with the same output power conditions, but the core losses are quite different and it causes different magnetic and thermal characteristics. For comparison of these two topologies of Stator Cores, therefore, core losses have been calculated and used as a heat source in noload conditions, and the thermal stress has been also calculated. 3-D finite element method has been used for the magnetic field, thermal, and stress analysis to consider the 3-D flux path of the TFRM. After comparing the analysis results of the two topologies, experimental results are also presented and discussed.

  • Comparative study of Stator core composition in transverse flux rotary machine
    Journal of Electrical Engineering and Technology, 2011
    Co-Authors: Ji Young Lee, Seung-ryul Moon, Dae-hyun Koo, Geun-ho Lee, Do Hyun Kang, Jung-pyo Hong
    Abstract:

    This paper deals with the comparison of magnetic characteristics in transverse flux rotary machine according to different Stator core composition with the same rotor. Three different Stator designs are considered in the analysis according to the material composition of inner and outer Stator Cores. Electromotive force (EMF), inductance, torque, and core losses are calculated by threedimensional finite element analysis. Calculated and measured results of back-EMF according to the analysis models in dependency on speed are presented.

  • Comparative Study of Stator Core Composition in Transverse Flux
    2011
    Co-Authors: Ji Young Lee, Seung-ryul Moon, Dae-hyun Koo, Geun-ho Lee, Do Hyun Kang, Jung-pyo Hong
    Abstract:

    This paper deals with the comparison of magnetic characteristics in transverse flux rotary machine according to different Stator core composition with the same rotor. Three different Stator de- signs are considered in the analysis according to the material composition of inner and outer Stator Cores. Electromotive force (EMF), inductance, torque, and core losses are calculated by three- dimensional finite element analysis. Calculated and measured results of back-EMF according to the analysis models in dependency on speed are presented.

Jung-pyo Hong - One of the best experts on this subject based on the ideXlab platform.

  • Comparative study of Stator core composition in transverse flux rotary machine
    Journal of Electrical Engineering and Technology, 2011
    Co-Authors: Ji Young Lee, Seung-ryul Moon, Dae-hyun Koo, Geun-ho Lee, Do Hyun Kang, Jung-pyo Hong
    Abstract:

    This paper deals with the comparison of magnetic characteristics in transverse flux rotary machine according to different Stator core composition with the same rotor. Three different Stator designs are considered in the analysis according to the material composition of inner and outer Stator Cores. Electromotive force (EMF), inductance, torque, and core losses are calculated by threedimensional finite element analysis. Calculated and measured results of back-EMF according to the analysis models in dependency on speed are presented.

  • Comparative Study of Stator Core Composition in Transverse Flux
    2011
    Co-Authors: Ji Young Lee, Seung-ryul Moon, Dae-hyun Koo, Geun-ho Lee, Do Hyun Kang, Jung-pyo Hong
    Abstract:

    This paper deals with the comparison of magnetic characteristics in transverse flux rotary machine according to different Stator core composition with the same rotor. Three different Stator de- signs are considered in the analysis according to the material composition of inner and outer Stator Cores. Electromotive force (EMF), inductance, torque, and core losses are calculated by three- dimensional finite element analysis. Calculated and measured results of back-EMF according to the analysis models in dependency on speed are presented.

Dae-hyun Koo - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Transverse Flux Rotary Machines with Different Stator Core Topologies
    Journal of Magnetics, 2014
    Co-Authors: Ji Young Lee, Dae-hyun Koo, Shi-uk Chung, Choong-kyu Han
    Abstract:

    The objective of this paper is to provide a comparison between two transverse flux rotary machines (TFRM) with different topologies of Stator Cores. Depending on how to make Stator core with laminated steel sheets, the one topology is ‘perpendicular stacking core’ and the other is ‘separated core.’ Both of the two Cores have been designed considering 3-dimensional (3-D) magnetic flux path with the same output power conditions, but the core losses are quite different and it causes different magnetic and thermal characteristics. For comparison of these two topologies of Stator Cores, therefore, core losses have been calculated and used as a heat source in noload conditions, and the thermal stress has been also calculated. 3-D finite element method has been used for the magnetic field, thermal, and stress analysis to consider the 3-D flux path of the TFRM. After comparing the analysis results of the two topologies, experimental results are also presented and discussed.

  • Comparative study of Stator core composition in transverse flux rotary machine
    Journal of Electrical Engineering and Technology, 2011
    Co-Authors: Ji Young Lee, Seung-ryul Moon, Dae-hyun Koo, Geun-ho Lee, Do Hyun Kang, Jung-pyo Hong
    Abstract:

    This paper deals with the comparison of magnetic characteristics in transverse flux rotary machine according to different Stator core composition with the same rotor. Three different Stator designs are considered in the analysis according to the material composition of inner and outer Stator Cores. Electromotive force (EMF), inductance, torque, and core losses are calculated by threedimensional finite element analysis. Calculated and measured results of back-EMF according to the analysis models in dependency on speed are presented.

  • Comparative Study of Stator Core Composition in Transverse Flux
    2011
    Co-Authors: Ji Young Lee, Seung-ryul Moon, Dae-hyun Koo, Geun-ho Lee, Do Hyun Kang, Jung-pyo Hong
    Abstract:

    This paper deals with the comparison of magnetic characteristics in transverse flux rotary machine according to different Stator core composition with the same rotor. Three different Stator de- signs are considered in the analysis according to the material composition of inner and outer Stator Cores. Electromotive force (EMF), inductance, torque, and core losses are calculated by three- dimensional finite element analysis. Calculated and measured results of back-EMF according to the analysis models in dependency on speed are presented.

R Krishnan - One of the best experts on this subject based on the ideXlab platform.

  • new designs of a two phase e core switched reluctance machine by optimizing the magnetic structure for a specific application concept design and analysis
    IEEE Transactions on Industry Applications, 2009
    Co-Authors: R Krishnan
    Abstract:

    Three new magnetic structures for an E-core switched reluctance machine (SRM) comprising two segmented Stator Cores or a monolithic Stator core are proposed for good manufacturability, mechanically robustness, ease of assembly, and electromagnetic-performance improvement. The E-core Stator has four small poles with phase windings and two or four large poles (hereinafter referred to as common poles) in between. The common poles do not have copper windings or permanent magnets. The common poles are shared by both phases for positive-torque generation during the entire operation. The air gap around the common pole has constant and minimum reluctance, irrespective of rotor position, by its unique design, and the two small Stator poles experience variable reluctance with respect to rotor position. The segmented Stator can be constructed with two independent and physically separate E-shaped Cores with L- or I-shaped yokes so that the straight back iron in the Stator rather than the curved back iron is suitable for assembly with other parts like end bells or brackets. The monolithic Stator also has an L-shaped yoke for the same reason, and the new E-core SRMs are designed by means of pole-arc optimization. The novel E-core SRMs are compared to a conventional two-phase SRM. The comparison includes cost savings, torque, copper and core losses, efficiency, and radial force in order to validate the distinct features of the E-core SRMs. For experimental verification, laboratory testing of a segmented E-core SRM is conducted, and the simulated and measured phase currents and voltages correlate well.

  • new designs of a two phase e core switched reluctance machine by optimizing the magnetic structure for a specific application concept design and analysis
    IEEE Industry Applications Society Annual Meeting, 2008
    Co-Authors: R Krishnan
    Abstract:

    Three new magnetic structures for an E-core SRM comprising two segmented Stator Cores or a monolithic Stator core are proposed for good manufacturability, mechanically robustness, ease of assembly, and electromagnetic performance improvement. The E-core Stator has four small poles with phase windings and two or four large poles (hereafter referred to as common poles), in between. The common poles do not have copper windings or permanent magnets. The common poles are shared by both phases for positive torque generation during the entire operation. The air gap around the common pole has constant and minimum reluctance irrespective of rotor position, by its unique design, and the two small Stator poles experience variable reluctance with respect to rotor position. The segmented Stator can be constructed with two independent and physically separate E-shaped Cores with L-shaped or I-shaped yokes so that the straight back iron in the Stator rather than curved back iron is suitable for assembly with other parts like end bells or brackets. The monolithic Stator also has an L-shaped yoke for the same reason, and the new E-core SRMs are designed by means of pole arc optimization. The novel SRMs are compared to a conventional two-phase SRM. The comparison includes cost savings, torque, copper and core losses, efficiency, and radial force in order to validate the distinct features of the E-core SRMs. For experimental verification, laboratory testing of a segmented E-core SRM is conducted, and the simulated and measured phase currents and voltages correlate well.

Linni Jian - One of the best experts on this subject based on the ideXlab platform.

  • a novel transverse flux permanent magnet disk wind power generator with h shaped Stator Cores
    Energies, 2018
    Co-Authors: Guobin Peng, Jin Wei, Yujun Shi, Ziyun Shao, Linni Jian
    Abstract:

    This paper presents a novel transverse flux permanent magnet disk generator (TFPMDG) for wind power generation. The main features of its structure are the modular H-shaped Stator Cores and two simple rotor disks. What is different from the structures introduced in the references is that each H-shaped Stator core is formed by two T-shaped iron Cores and a permanent magnet (PM) rather than a complete H-shaped core, which makes the manufacturing simpler and easier. Each rotor disk consists of a rotor holder and several rotor bars, resulting in high robustness and reliability. Moreover, two circular coils in the H-shaped Stator Cores together with the Stator disk are sandwiched by the two rotor disks, which improves the utilization of PMs. In this paper, the proposed TFPMDG is investigated in detail. Firstly, the structure and operating principle are introduced. Then, the magnetic circuit method is used to analyze the TFPMDG. Next, the three-dimensional (3D) finite element method (FEM) is employed to compute the magnetic field distribution and EMF at no load. According to the calculation result, the other three TFPMDGs with different shapes of rotor Cores are proposed and analyzed for better back EMF, and then a generator with good performance is selected for load analysis. Finally, a prototype is fabricated and tested, and the simulated results are compared with the measured ones, which proves the rationality of the simulated results.