Novel Dual-Rotor Single-Stator Coreless Permanent Magnet Machine With Dual-Flywheel

Wang, Zhenyu; Yang, Jiangtao; Dai, Shaoren; Feng, Yaojing; Huang, Shoudao

doi:10.1109/tmag.2022.3154749

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…The AFIM design employs a thin, multilayer plate and a solid rotor of two stators, whereas the outer rotor of the DRIM can double as a flywheel rotor [35][36][37]. These typical induction motor structures are presented in Figures 5 and 6 [30,[38][39][40].…”

Section: Induction Motors For Flywheel Energy Storage Systemsmentioning

confidence: 99%

A Review of Flywheel Energy Storage System Technologies

Xu,

Guo,

Lei

et al. 2023

Energies

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The operation of the electricity network has grown more complex due to the increased adoption of renewable energy resources, such as wind and solar power. Using energy storage technology can improve the stability and quality of the power grid. One such technology is flywheel energy storage systems (FESSs). Compared with other energy storage systems, FESSs offer numerous advantages, including a long lifespan, exceptional efficiency, high power density, and minimal environmental impact. This article comprehensively reviews the key components of FESSs, including flywheel rotors, motor types, bearing support technologies, and power electronic converter technologies. It also presents the diverse applications of FESSs in different scenarios. The progress of state-of-the-art research is discussed, emphasizing the use of artificial intelligence methods such as machine learning, digital twins, and data-driven techniques for system simulation, fault prediction, and life-assessment research. The article also addresses the challenges related to current research and the application of FESSs. It concludes by summarizing future directions and trends in FESS research, offering valuable information for further advancement and improvement in this field.

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Section: Induction Motors For Flywheel Energy Storage Systemsmentioning

confidence: 99%

A Review of Flywheel Energy Storage System Technologies

Xu,

Guo,

Lei

et al. 2023

Energies

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“…In order to simulate the dynamic change process of current, it can be set as a segmented function as in (12). When considering the starting process of the motor, since the current cannot be changed instantaneously, it is assumed that the starting process can be regarded as the current changing from 0 A to the rated value of 580 A in the course of 20 s and running at the rated current for 10 s, after which the current reaches 600 A via 20 s, and then the current returns to its original rated value after 20 s after running at the current of 600 A for 15 s, and continues to run at the rated value of 580 A.…”

Section: B Solving For Rotor Displacement Under Motor Conditionmentioning

confidence: 99%

“…And its cogging torque is large, which makes the machine fabrication and assembly difficult and unfavorable for bearing support [10]. Axial-field permanent magnet synchronous machine(AFPMSM), are characterized by short axial size, light weight and compact structure, high efficiency, and high power density [11], which is more suitable for large-capacity FESS [12][13]. However, it is difficult to apply the structure of a two-rotor disk machine to FESS because the flywheel rotor is placed in parallel with the disk machine [14].…”

Section: Introductionmentioning

confidence: 99%

Research on the Axial Stability of Large-Capacity Magnetic Levitation Flywheel Driven by Axial-Flux Permanent Magnet Machine Based on Runge-Kutta Method

Sun,

2024

IEEE Access

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For high-capacity flywheel energy storage system (FESS) applied in the field of wind power frequency regulation, high-power, well-performance machine and magnetic bearings are developed. However, due to the existence of axial magnetic force in this machine structure along with the uncontrollability of the magnetic bearing, the axial stability of the flywheel needs to be focused on. Firstly, a FESS with an axial flux permanent magnet synchronous machine (AFPMSM) based on soft magnetic composite (SMC) material and HALBACH axial passive magnetic bearing (PMB) structure is proposed, and its principle and structural superiority are introduced. Secondly, a three-dimensional (3D) finite element method (FEM) simulation model of the machine and bearing is established. The effects of current, air gap and bearing parameters on the rotor axial force are investigated using the 3D FEM. In addition, the relationship between current and displacement on axial force is fitted by the response surface method (RSM). The startup process and the effect of current change on displacement of the flywheel under different operating conditions are investigated by the Runge-kutta (RK) method. After that, the rotor displacement under various air gaps and bearing forces is studied to ensure that the rotor displacement is smaller than the air gap, thereby ensuring the flywheel rotor stays within a controllable range. Finally, the FESS prototype is manufactured and tested, which finally enables it to operate safely and stably.INDEX TERMS Flywheel energy storage system(FESS), axial-flux permanent magnet synchronous machine(AFPMSM), axial magnetic bearing(AMB), Runge-kutta (RK) method, Response surface modeling (RSM),axial stability.

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