Getting external load characteristics of the axle-box generator

Abstract

Abstract This article addresses the problem of supplying freight railcars. It is about the axle-box generator. The generator uses to power the on-board electronics. The design feature consists in the fact that the generator is installed to the generator’s axle-box and, as a result, it has increased requirements for the weight and size indications. The generator was designed with an external rotor due to the limited space, since the rotor acts as an inductor. The inductor is made of permanent magnets. The stator is made of laminated electrical steel in the six-pointed star form. The winding is made of copper conductor with a cross-sectional area of 0.2 mm2. Characteristics are presented in the form of waveforms and graphs. During the experiment, a number of oscillograms were taken and harmonics were counted. Voltage were also measured at different loads and rotation speeds. The obtained power at an average speed of 30 km/h was 4 W, and at a speed of 80 km/h it was 6.3 W. The method for determining the parameters of the anchor chain equivalent circuit is given.