This study aims to produce Fe2.9wt.%Si ferromagnetic material via laser powder bed fusion (L-PBF) for the realization of electromagnetic actuators (EMA). This study is necessary as there are no documents in scientific literature regarding the manufacturing of Iron-Silicon plungers using the L-PBF additive manufacturing (AM) technique. The microstructure, and magnetic properties were characterized using various techniques. The results indicate that the samples produced via L-PBF process exhibit good magnetic properties (μ = 748, H_C = 87.7[ A/m ]) especially after annealing treatment at 1200° C for 1h (μ = 3224, H_C = 69.1[ A/m ]), making it a promising material for use in electromagnetic actuators.

Ferromagnetic materials are used in various applications such as rotating electrical machines, wind turbines, electromagnetic shielding, transformers, and electromagnets. Compared to hard magnetic materials, their hysteresis cycles are featured by low values of coercive magnetic field and high permeability. The application of additive manufacturing to ferromagnetic materials is gaining more and more attraction. Indeed, thanks to a wider geometrical freedom, new topological optimized shapes for stator/rotor shapes can be addressed to enhance electric machines performances. However, the properties of the laser powder bed fusion (LPBF) processed alloy compared to conventionally produced counterpart must be still addressed. Accordingly, this paper presents for the first time the use of the LPBF for the manufacturing of Fe2.9wt.%Si electromagnetic shields. The process parameter selection material microstructure and the magnetic shielding factor are characterized.

The increasing diffusion of small-scale cogeneration technologies such as Microturbines (MTs) requires a careful assessment of the energy efficiency and the environmental impact of the plant solutions, especially if installed in urban areas with strict air quality standards. This paper deals with the local and global emission characteristics from clusters of MTs in different operation modes. The analysis is carried out on a set of specific MTs following various electrical loads. The outcomes show that the operational regulation strategy within a cluster of a given MT typology has a strong impact on the resulting emissions, with significant differences depending on the type of pollutant and on the relevant MT emission profiles.

In this paper, we looked at the role of electromechanical storage in railway applications. A mathematical model of a running train was interfaced with real products on the electromechanical storage market supposed to be installed at the substation. Through this simulation, we gathered data on the recoverable energy of the system, its advantages, and its limitations. Various storage powers were run along variations in speed and gradient to paint a clearer picture of this application. Throughout these simulations, the energy savings were between 25% and 38%, saving up to 0.042 kWh/(seat km).