In the quest for more efficient and compact wind power solutions, researchers are turning to axial flux permanent magnet generators (AFPMGs), and a recent study published in the journal *Engineering Proceedings* sheds new light on their design and optimization. Led by Hung Vu Xuan from the Department of Electrical Engineering at Hanoi University of Science and Technology, the research focuses on developing effective analytical and computational models to enhance the performance of AFPMGs, particularly for vertical axis wind turbines.
AFPMGs offer several advantages over conventional radial flux machines, especially in applications where space is limited in the axial direction. “They provide high torque density, a compact structure, and modular design capabilities,” explains Xuan. These features make them increasingly attractive for wind power and electric vehicles, where space and efficiency are critical.
The study introduces an analytical model and an equivalent auto-finite element method (FEM) that includes rotor linear motion. This approach allows for the initial design of a 1.35 kW-AFPM generator with an outer double rotor and double layer concentrated windings. The design is then refined using a time-stepping transient FEM, which calculates voltage, electromagnetic force, and torque more accurately than traditional methods.
One of the key innovations in this research is the automatic generation of an equivalent transient 2D-FEM model, which significantly reduces the time and computational resources required compared to a 3D-FEM model. “This method not only speeds up the design process but also provides more precise insights into the performance of the generator,” says Xuan.
The research also investigates the influence of slotting on the performance of the 1.35 kW-AFPM machine, particularly in terms of air gap flux density, internal voltage, and cogging torque. Understanding these effects is crucial for optimizing the design and ensuring optimal performance in real-world applications.
The implications of this research are substantial for the energy sector. As wind power continues to grow as a key component of the renewable energy mix, the development of more efficient and compact generators can lead to significant cost savings and improved performance. The insights gained from this study could pave the way for more advanced designs of AFPMGs, making them more accessible and practical for a wider range of applications.
Published in *Engineering Proceedings*, the journal known for its focus on cutting-edge engineering research, this study represents a significant step forward in the field of wind power technology. As the energy sector continues to evolve, the work of researchers like Hung Vu Xuan will be instrumental in shaping the future of renewable energy.