Magnetic Flux Switching Type Permanent Magnet Generator for Bicycles: Modelling and an Experimental Study

Abstract

The article introduces two new designs of flux switching permanent magnet alternators with a radial and an axial arrangement of the inductor relative to the magnetic flux switch. The study presents the results of 3D magnetic flux modelling along with the outcomes of physical experiments. In the course of laboratory experiments, the results of theoretical estimations are compared with actual physical performance parameters. The results are presented in the form of power and output voltage curves in relation to the frequency and load current. The study proposes the practical application of the alternators based on the magnetic flux switching principle in the development of a bicycle generator. Laboratory test models are made of a laminated steel using a waste-free technology.

The Study of Properties of an Axial Flux Switching Permanent Magnet Alternator with Open Magnetic Cores

“…6) for displacing the MFTS by an angle of 180° electrical degrees. The results of experimental studies discussed in [15] show that the employed 3D model together with EMWorks software allow estimating the values of magnetic fluxes in the inductor with high reliability. Thus, the study of the influence of the shape modifications of alternator on its power characteristics can be carried out in comparison with the base model, which is used as a physical experimental sample.…”

“…Previous works on this topic [15], [16] present the results of the studies of an axial flux switching permanent magnet alternators, the design of which is intended to work with a rotary motion drive. In these devices, OMC are manufactured using strip technology.…”

Axial Flux Switching Permanent Magnet Alternator with External Magnetic Cores

“…In the considered case, the actuating mechanism is a bicycle wheel, from which the strip of magnetic flux switch is driven. In the process of choosing the design of a brushless alternator, the design of which could be adapted for installation on a bicycle, a number of technical solutions were developed [13]- [18].…”