The Experts below are selected from a list of 111 Experts worldwide ranked by ideXlab platform

Shukang Lyu - One of the best experts on this subject based on the ideXlab platform.

  • Investigation of Hybrid-Magnet-Circuit Variable Flux Memory Machines With Different Hybrid Magnet Configurations
    IEEE Transactions on Industry Applications, 2021
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This article investigates and compares the electromagnetic performance of two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different hybrid permanent magnet (PM) configurations. The investigated HMC-VFMMs are both geometrically characterized by a combination of series and parallel magnetic Circuit topologies, but with different positions of series and parallel PM branches. The developed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization withstand capability in series structure. The topologies, features, and working principles of the studied HMC-VFMMs with different hybrid magnet configurations are described, respectively. The magnetic Circuit model is utilized to analytically reveal the performance metrics of the two machines. The electromagnetic characteristics of the radially magnetized (RM) and circumferentially magnetized LCF types of HMC-VFMMs are evaluated and compared by the finite-element method. Furthermore, the performance comparison of the proposed RM-type HMC-VFMM with a benchmark interior PM machine is conducted. The experiments on RM-type HMC-VFMM prototype with RM-structure are carried out to validate the FE analyses.

  • A Novel Hybrid-Magnetic-Circuit Variable Flux Memory Machine
    IEEE Transactions on Industrial Electronics, 2020
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Tiangang Wang
    Abstract:

    This article proposes a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM) by combining series and parallel hybrid magnet structures. Thus, the synergies of wide flux regulation range in parallel type and excellent on-load demagnetization withstand capability in series type can be simultaneously obtained with the proposed HMC design. Meanwhile, two sets of the permanent magnets (PMs) with high coercive force and low coercive force (LCF), i.e., NdFeB and AlNiCo PMs, are employed to achieve high torque density and energy-efficient magnetization state adjustment. The topologies and tradeoffs of traditional parallel and series VFMMs are addressed first. In addition, the structure evolution, features and operating principle of the proposed HMC-VFMM are described, respectively. A simplified equivalent magnetic Circuit is modeled to reveal the performance improvement of the machine. Then, the design improvements with q-axis barriers are presented to elevate the LCF PM working point for preventing the on-load demagnetizing effect, while maintaining the torque capability. The electromagnetic characteristics of the HMC design are investigated and compared with the parallel/series counterparts. Finally, the experiments have been carried out to validate the finite-element analyses.

  • Analysis of Novel Hybrid-Magnet-Circuit Variable Flux Memory Machines with Different Magnet Arrangements
    2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This paper presents two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different permanent magnet (PM) configurations. The proposed HMC-VFMMs are both characterized by a combination of series and parallel Circuit topologies, but with different positions of series and parallel PM branches. The proposed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization (UD) withstand capability in series structure. The topologies, features and working principles of the proposed HMC-VFMMs with different magnet arrangements are introduced, respectively. The magnetic Circuit model is utilized to reveal the underlying working mechanism and performance metrics of the proposed HMC-VFMMs having different PM types. The electromagnetic characteristics of the HMC-VFMMs having radially-magnetized (RM) and circumferentially-magnetized (CM) LCF PM types are evaluated and compared by the finite-element (FE) method. The experiments on a 21-slot/4-pole prototype with RM-structure are carried out to validate the FE analyses.

  • Analysis of Flux Regulation Principle in a Novel Hybrid-Magnet-Circuit Variable Flux Memory Machine
    2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Hao Zheng, Zi-qiang Zhu
    Abstract:

    This paper focuses on the flux regulation principle in a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM). The proposed HMC-VFMM combines the distinct advantages of series and parallel hybrid magnet Circuits, namely, wide flux adjusting range in parallel type and excellent on-load demagnetization withstand capability in series type. A simplified Fourier-series based hysteresis model is developed and numerically programmed in finite-element software in order to track the movement of the working point of low coercive force (LCF) magnet accurately. This allows a general analysis solution to investigate the flux regulation characteristics of the proposed HMC-VFMM. In addition, the frozen-permeability method (FPM) is employed to extract the actual paths of the magnetic fields due to different excitations. Finally, the flux regulation experiments of the HMC-VFMM prototype are established to confirm the merits of the proposed design in terms of the relative overlapping between one-way and bi-directional magnetization characteristics, which is beneficial for online magnetization state (MS) manipulation.

Hui Yang - One of the best experts on this subject based on the ideXlab platform.

  • Investigation of Hybrid-Magnet-Circuit Variable Flux Memory Machines With Different Hybrid Magnet Configurations
    IEEE Transactions on Industry Applications, 2021
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This article investigates and compares the electromagnetic performance of two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different hybrid permanent magnet (PM) configurations. The investigated HMC-VFMMs are both geometrically characterized by a combination of series and parallel magnetic Circuit topologies, but with different positions of series and parallel PM branches. The developed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization withstand capability in series structure. The topologies, features, and working principles of the studied HMC-VFMMs with different hybrid magnet configurations are described, respectively. The magnetic Circuit model is utilized to analytically reveal the performance metrics of the two machines. The electromagnetic characteristics of the radially magnetized (RM) and circumferentially magnetized LCF types of HMC-VFMMs are evaluated and compared by the finite-element method. Furthermore, the performance comparison of the proposed RM-type HMC-VFMM with a benchmark interior PM machine is conducted. The experiments on RM-type HMC-VFMM prototype with RM-structure are carried out to validate the FE analyses.

  • A Novel Hybrid-Magnetic-Circuit Variable Flux Memory Machine
    IEEE Transactions on Industrial Electronics, 2020
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Tiangang Wang
    Abstract:

    This article proposes a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM) by combining series and parallel hybrid magnet structures. Thus, the synergies of wide flux regulation range in parallel type and excellent on-load demagnetization withstand capability in series type can be simultaneously obtained with the proposed HMC design. Meanwhile, two sets of the permanent magnets (PMs) with high coercive force and low coercive force (LCF), i.e., NdFeB and AlNiCo PMs, are employed to achieve high torque density and energy-efficient magnetization state adjustment. The topologies and tradeoffs of traditional parallel and series VFMMs are addressed first. In addition, the structure evolution, features and operating principle of the proposed HMC-VFMM are described, respectively. A simplified equivalent magnetic Circuit is modeled to reveal the performance improvement of the machine. Then, the design improvements with q-axis barriers are presented to elevate the LCF PM working point for preventing the on-load demagnetizing effect, while maintaining the torque capability. The electromagnetic characteristics of the HMC design are investigated and compared with the parallel/series counterparts. Finally, the experiments have been carried out to validate the finite-element analyses.

  • Analysis of Novel Hybrid-Magnet-Circuit Variable Flux Memory Machines with Different Magnet Arrangements
    2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This paper presents two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different permanent magnet (PM) configurations. The proposed HMC-VFMMs are both characterized by a combination of series and parallel Circuit topologies, but with different positions of series and parallel PM branches. The proposed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization (UD) withstand capability in series structure. The topologies, features and working principles of the proposed HMC-VFMMs with different magnet arrangements are introduced, respectively. The magnetic Circuit model is utilized to reveal the underlying working mechanism and performance metrics of the proposed HMC-VFMMs having different PM types. The electromagnetic characteristics of the HMC-VFMMs having radially-magnetized (RM) and circumferentially-magnetized (CM) LCF PM types are evaluated and compared by the finite-element (FE) method. The experiments on a 21-slot/4-pole prototype with RM-structure are carried out to validate the FE analyses.

  • Analysis of Flux Regulation Principle in a Novel Hybrid-Magnet-Circuit Variable Flux Memory Machine
    2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Hao Zheng, Zi-qiang Zhu
    Abstract:

    This paper focuses on the flux regulation principle in a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM). The proposed HMC-VFMM combines the distinct advantages of series and parallel hybrid magnet Circuits, namely, wide flux adjusting range in parallel type and excellent on-load demagnetization withstand capability in series type. A simplified Fourier-series based hysteresis model is developed and numerically programmed in finite-element software in order to track the movement of the working point of low coercive force (LCF) magnet accurately. This allows a general analysis solution to investigate the flux regulation characteristics of the proposed HMC-VFMM. In addition, the frozen-permeability method (FPM) is employed to extract the actual paths of the magnetic fields due to different excitations. Finally, the flux regulation experiments of the HMC-VFMM prototype are established to confirm the merits of the proposed design in terms of the relative overlapping between one-way and bi-directional magnetization characteristics, which is beneficial for online magnetization state (MS) manipulation.

Zi-qiang Zhu - One of the best experts on this subject based on the ideXlab platform.

  • Investigation of Hybrid-Magnet-Circuit Variable Flux Memory Machines With Different Hybrid Magnet Configurations
    IEEE Transactions on Industry Applications, 2021
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This article investigates and compares the electromagnetic performance of two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different hybrid permanent magnet (PM) configurations. The investigated HMC-VFMMs are both geometrically characterized by a combination of series and parallel magnetic Circuit topologies, but with different positions of series and parallel PM branches. The developed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization withstand capability in series structure. The topologies, features, and working principles of the studied HMC-VFMMs with different hybrid magnet configurations are described, respectively. The magnetic Circuit model is utilized to analytically reveal the performance metrics of the two machines. The electromagnetic characteristics of the radially magnetized (RM) and circumferentially magnetized LCF types of HMC-VFMMs are evaluated and compared by the finite-element method. Furthermore, the performance comparison of the proposed RM-type HMC-VFMM with a benchmark interior PM machine is conducted. The experiments on RM-type HMC-VFMM prototype with RM-structure are carried out to validate the FE analyses.

  • A Novel Hybrid-Magnetic-Circuit Variable Flux Memory Machine
    IEEE Transactions on Industrial Electronics, 2020
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Tiangang Wang
    Abstract:

    This article proposes a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM) by combining series and parallel hybrid magnet structures. Thus, the synergies of wide flux regulation range in parallel type and excellent on-load demagnetization withstand capability in series type can be simultaneously obtained with the proposed HMC design. Meanwhile, two sets of the permanent magnets (PMs) with high coercive force and low coercive force (LCF), i.e., NdFeB and AlNiCo PMs, are employed to achieve high torque density and energy-efficient magnetization state adjustment. The topologies and tradeoffs of traditional parallel and series VFMMs are addressed first. In addition, the structure evolution, features and operating principle of the proposed HMC-VFMM are described, respectively. A simplified equivalent magnetic Circuit is modeled to reveal the performance improvement of the machine. Then, the design improvements with q-axis barriers are presented to elevate the LCF PM working point for preventing the on-load demagnetizing effect, while maintaining the torque capability. The electromagnetic characteristics of the HMC design are investigated and compared with the parallel/series counterparts. Finally, the experiments have been carried out to validate the finite-element analyses.

  • Analysis of Novel Hybrid-Magnet-Circuit Variable Flux Memory Machines with Different Magnet Arrangements
    2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This paper presents two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different permanent magnet (PM) configurations. The proposed HMC-VFMMs are both characterized by a combination of series and parallel Circuit topologies, but with different positions of series and parallel PM branches. The proposed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization (UD) withstand capability in series structure. The topologies, features and working principles of the proposed HMC-VFMMs with different magnet arrangements are introduced, respectively. The magnetic Circuit model is utilized to reveal the underlying working mechanism and performance metrics of the proposed HMC-VFMMs having different PM types. The electromagnetic characteristics of the HMC-VFMMs having radially-magnetized (RM) and circumferentially-magnetized (CM) LCF PM types are evaluated and compared by the finite-element (FE) method. The experiments on a 21-slot/4-pole prototype with RM-structure are carried out to validate the FE analyses.

  • Analysis of Flux Regulation Principle in a Novel Hybrid-Magnet-Circuit Variable Flux Memory Machine
    2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Hao Zheng, Zi-qiang Zhu
    Abstract:

    This paper focuses on the flux regulation principle in a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM). The proposed HMC-VFMM combines the distinct advantages of series and parallel hybrid magnet Circuits, namely, wide flux adjusting range in parallel type and excellent on-load demagnetization withstand capability in series type. A simplified Fourier-series based hysteresis model is developed and numerically programmed in finite-element software in order to track the movement of the working point of low coercive force (LCF) magnet accurately. This allows a general analysis solution to investigate the flux regulation characteristics of the proposed HMC-VFMM. In addition, the frozen-permeability method (FPM) is employed to extract the actual paths of the magnetic fields due to different excitations. Finally, the flux regulation experiments of the HMC-VFMM prototype are established to confirm the merits of the proposed design in terms of the relative overlapping between one-way and bi-directional magnetization characteristics, which is beneficial for online magnetization state (MS) manipulation.

Hao Zheng - One of the best experts on this subject based on the ideXlab platform.

  • Investigation of Hybrid-Magnet-Circuit Variable Flux Memory Machines With Different Hybrid Magnet Configurations
    IEEE Transactions on Industry Applications, 2021
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This article investigates and compares the electromagnetic performance of two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different hybrid permanent magnet (PM) configurations. The investigated HMC-VFMMs are both geometrically characterized by a combination of series and parallel magnetic Circuit topologies, but with different positions of series and parallel PM branches. The developed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization withstand capability in series structure. The topologies, features, and working principles of the studied HMC-VFMMs with different hybrid magnet configurations are described, respectively. The magnetic Circuit model is utilized to analytically reveal the performance metrics of the two machines. The electromagnetic characteristics of the radially magnetized (RM) and circumferentially magnetized LCF types of HMC-VFMMs are evaluated and compared by the finite-element method. Furthermore, the performance comparison of the proposed RM-type HMC-VFMM with a benchmark interior PM machine is conducted. The experiments on RM-type HMC-VFMM prototype with RM-structure are carried out to validate the FE analyses.

  • A Novel Hybrid-Magnetic-Circuit Variable Flux Memory Machine
    IEEE Transactions on Industrial Electronics, 2020
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Tiangang Wang
    Abstract:

    This article proposes a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM) by combining series and parallel hybrid magnet structures. Thus, the synergies of wide flux regulation range in parallel type and excellent on-load demagnetization withstand capability in series type can be simultaneously obtained with the proposed HMC design. Meanwhile, two sets of the permanent magnets (PMs) with high coercive force and low coercive force (LCF), i.e., NdFeB and AlNiCo PMs, are employed to achieve high torque density and energy-efficient magnetization state adjustment. The topologies and tradeoffs of traditional parallel and series VFMMs are addressed first. In addition, the structure evolution, features and operating principle of the proposed HMC-VFMM are described, respectively. A simplified equivalent magnetic Circuit is modeled to reveal the performance improvement of the machine. Then, the design improvements with q-axis barriers are presented to elevate the LCF PM working point for preventing the on-load demagnetizing effect, while maintaining the torque capability. The electromagnetic characteristics of the HMC design are investigated and compared with the parallel/series counterparts. Finally, the experiments have been carried out to validate the finite-element analyses.

  • Analysis of Novel Hybrid-Magnet-Circuit Variable Flux Memory Machines with Different Magnet Arrangements
    2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This paper presents two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different permanent magnet (PM) configurations. The proposed HMC-VFMMs are both characterized by a combination of series and parallel Circuit topologies, but with different positions of series and parallel PM branches. The proposed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization (UD) withstand capability in series structure. The topologies, features and working principles of the proposed HMC-VFMMs with different magnet arrangements are introduced, respectively. The magnetic Circuit model is utilized to reveal the underlying working mechanism and performance metrics of the proposed HMC-VFMMs having different PM types. The electromagnetic characteristics of the HMC-VFMMs having radially-magnetized (RM) and circumferentially-magnetized (CM) LCF PM types are evaluated and compared by the finite-element (FE) method. The experiments on a 21-slot/4-pole prototype with RM-structure are carried out to validate the FE analyses.

  • Analysis of Flux Regulation Principle in a Novel Hybrid-Magnet-Circuit Variable Flux Memory Machine
    2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Hao Zheng, Zi-qiang Zhu
    Abstract:

    This paper focuses on the flux regulation principle in a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM). The proposed HMC-VFMM combines the distinct advantages of series and parallel hybrid magnet Circuits, namely, wide flux adjusting range in parallel type and excellent on-load demagnetization withstand capability in series type. A simplified Fourier-series based hysteresis model is developed and numerically programmed in finite-element software in order to track the movement of the working point of low coercive force (LCF) magnet accurately. This allows a general analysis solution to investigate the flux regulation characteristics of the proposed HMC-VFMM. In addition, the frozen-permeability method (FPM) is employed to extract the actual paths of the magnetic fields due to different excitations. Finally, the flux regulation experiments of the HMC-VFMM prototype are established to confirm the merits of the proposed design in terms of the relative overlapping between one-way and bi-directional magnetization characteristics, which is beneficial for online magnetization state (MS) manipulation.

Heyun Lin - One of the best experts on this subject based on the ideXlab platform.

  • Investigation of Hybrid-Magnet-Circuit Variable Flux Memory Machines With Different Hybrid Magnet Configurations
    IEEE Transactions on Industry Applications, 2021
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This article investigates and compares the electromagnetic performance of two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different hybrid permanent magnet (PM) configurations. The investigated HMC-VFMMs are both geometrically characterized by a combination of series and parallel magnetic Circuit topologies, but with different positions of series and parallel PM branches. The developed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization withstand capability in series structure. The topologies, features, and working principles of the studied HMC-VFMMs with different hybrid magnet configurations are described, respectively. The magnetic Circuit model is utilized to analytically reveal the performance metrics of the two machines. The electromagnetic characteristics of the radially magnetized (RM) and circumferentially magnetized LCF types of HMC-VFMMs are evaluated and compared by the finite-element method. Furthermore, the performance comparison of the proposed RM-type HMC-VFMM with a benchmark interior PM machine is conducted. The experiments on RM-type HMC-VFMM prototype with RM-structure are carried out to validate the FE analyses.

  • A Novel Hybrid-Magnetic-Circuit Variable Flux Memory Machine
    IEEE Transactions on Industrial Electronics, 2020
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Tiangang Wang
    Abstract:

    This article proposes a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM) by combining series and parallel hybrid magnet structures. Thus, the synergies of wide flux regulation range in parallel type and excellent on-load demagnetization withstand capability in series type can be simultaneously obtained with the proposed HMC design. Meanwhile, two sets of the permanent magnets (PMs) with high coercive force and low coercive force (LCF), i.e., NdFeB and AlNiCo PMs, are employed to achieve high torque density and energy-efficient magnetization state adjustment. The topologies and tradeoffs of traditional parallel and series VFMMs are addressed first. In addition, the structure evolution, features and operating principle of the proposed HMC-VFMM are described, respectively. A simplified equivalent magnetic Circuit is modeled to reveal the performance improvement of the machine. Then, the design improvements with q-axis barriers are presented to elevate the LCF PM working point for preventing the on-load demagnetizing effect, while maintaining the torque capability. The electromagnetic characteristics of the HMC design are investigated and compared with the parallel/series counterparts. Finally, the experiments have been carried out to validate the finite-element analyses.

  • Analysis of Novel Hybrid-Magnet-Circuit Variable Flux Memory Machines with Different Magnet Arrangements
    2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
    Co-Authors: Hui Yang, Heyun Lin, Zi-qiang Zhu, Hao Zheng, Jiaxing Lei, Wei Liu, Shukang Lyu
    Abstract:

    This paper presents two novel hybrid-magnetic-Circuit Variable flux memory machines (HMC-VFMMs) with different permanent magnet (PM) configurations. The proposed HMC-VFMMs are both characterized by a combination of series and parallel Circuit topologies, but with different positions of series and parallel PM branches. The proposed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization (UD) withstand capability in series structure. The topologies, features and working principles of the proposed HMC-VFMMs with different magnet arrangements are introduced, respectively. The magnetic Circuit model is utilized to reveal the underlying working mechanism and performance metrics of the proposed HMC-VFMMs having different PM types. The electromagnetic characteristics of the HMC-VFMMs having radially-magnetized (RM) and circumferentially-magnetized (CM) LCF PM types are evaluated and compared by the finite-element (FE) method. The experiments on a 21-slot/4-pole prototype with RM-structure are carried out to validate the FE analyses.

  • Analysis of Flux Regulation Principle in a Novel Hybrid-Magnet-Circuit Variable Flux Memory Machine
    2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
    Co-Authors: Hui Yang, Shukang Lyu, Heyun Lin, Hao Zheng, Zi-qiang Zhu
    Abstract:

    This paper focuses on the flux regulation principle in a novel hybrid-magnetic-Circuit Variable flux memory machine (HMC-VFMM). The proposed HMC-VFMM combines the distinct advantages of series and parallel hybrid magnet Circuits, namely, wide flux adjusting range in parallel type and excellent on-load demagnetization withstand capability in series type. A simplified Fourier-series based hysteresis model is developed and numerically programmed in finite-element software in order to track the movement of the working point of low coercive force (LCF) magnet accurately. This allows a general analysis solution to investigate the flux regulation characteristics of the proposed HMC-VFMM. In addition, the frozen-permeability method (FPM) is employed to extract the actual paths of the magnetic fields due to different excitations. Finally, the flux regulation experiments of the HMC-VFMM prototype are established to confirm the merits of the proposed design in terms of the relative overlapping between one-way and bi-directional magnetization characteristics, which is beneficial for online magnetization state (MS) manipulation.