Abstract
For the design of printed circuit board (PCB) winding, it is necessary to take into account the requirements of electromagnetic and manufacture technology of PCB winding, which directly affect the output power of the machine. In this paper, for axial flux permanent magnet generator (AFPMG) of a small wind power system, the unequal-width (UEW) winding is proposed for the aim of improving the output power of the generator. The design ideas and methods of unequal-width (UEW) winding are proposed in combination with manufacture technology of the PCB. The finite element analysis (FEA) model of machine is built. The analytical formulas of electromotive force (EMF) and winding loss are derived. Though the comparisons between reactance and impedance of PCB winding, the analytical formula of output power is simplified. These characteristics of the generator with traditional equal-width(EW) winding and proposed UEW winding are analyzed and compared in detail by FEA and analytical calculation. The result shows that the output power of the generator with UEW winding is improved largely. Finally, the validity of the FEA model and analysis method is verified by experiment of prototype machine, which provides the reference for the design of AFPMG with PCB winding.
Highlights
This Axial flux permanent magnet (AFPM) machine, known as a disc permanent magnet machine, has the characteristics of short axial dimension, high efficiency and high power density [1]–[4]
Aiming at improving the output power of AFPM generators applied to small wind power generation systems, this paper proposes a new type of unequal width (UEW) concentric spiral winding by combining with printed circuit board (PCB) production technology
In this article, a new type of UEW PCB winding and its design ideas are proposed for axial flux permanent magnet generator (AFPMG)
Summary
This Axial flux permanent magnet (AFPM) machine, known as a disc permanent magnet machine, has the characteristics of short axial dimension, high efficiency and high power density [1]–[4]. It’s crucial for the design towards PCB winding to improve the output power of axial flux permanent magnet generator (AFPMG). There is no recommendation for optimizing some dimensions of the PCB stator to improve the output power of generator. If combining with the production technology of PCB, the number of turns and line width of PCB winding may be synergistically optimized, which may further reduce the copper losses and improve the output power of the generator. Aiming at improving the output power of AFPM generators applied to small wind power generation systems, this paper proposes a new type of unequal width (UEW) concentric spiral winding by combining with PCB production technology. In order to reduce the winding resistance and further improve the output power of the generator, a multi-layer parallel winding structure is adopted. The validity of the FEA and analytical calculation is verified by the prototype experiment, which provides theoretical and engineering application reference for the research of AFPMG and the proposed design of PCB winding
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