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The purpose of this paper is to exploit the optimal performances of each magnetic material in terms of low iron losses and high saturation flux density to improve the efficiency and the power density of the selected motor.

This paper presents a study to improve the power density and efficiency of e-motors for electric traction applications with high operating speed. The studied machine is a yokeless-stator axial flux permanent magnet synchronous motor with a dual rotor. The methodology consists in using different magnetic materials for an optimal design of the stator and rotor magnetic circuits to improve the motor performance. The candidate magnetic materials, adapted to the constraints of e-mobility, are made of thin laminations of Si-Fe nonoriented grain electrical steel, Si-Fe grain-oriented electrical steel (GOES) and iron-cobalt Permendur electrical steel (Co-Fe).

The mixed GOES-Co-Fe structure allows to reach 10 kW/kg in rated power density and a high efficiency in city driving conditions. This structure allows to make the powertrain less energy consuming in the battery electric vehicles and to reduce CO₂ emissions in hybrid electric vehicles.

The originality of this study lies in the improvement of both power density and efficiency of the electric motor in automotive application by using different magnetic materials through a multiobjective optimization.

Focusing on the Agri-Food and Beverage sector, the paper investigates the direct effect of worldwide mandatory non-financial disclosure on several financial dimensions as well as its moderating effects on the relationship between sustainability and financial performance.

The authors performed fixed-effect regressions on a sample of 180 global listed companies, considering a period of eight years. The authors also tested the moderating effects of non-financial disclosure regulation on the relationship between sustainability and financial performance.

The authors found a positive direct impact of mandatory non-financial disclosure on Operating Return on Asset, Return on Equity and Return on Sales. The analysis also highlighted the negative moderating effects of non-financial reporting regulation on the relationship between sustainability issues and financial performance. As for the Cost of Debt, the authors found mixed results.

This study considers a short-term perspective focusing on a limited sample composed of companies playing a key role in the global agri-food system.

The paper identifies which financial performance dimensions are positively or negatively affected by mandatory non-financial disclosure. Accordingly, managers can rearrange corporate activities to deal with further reporting normative requirements concurrently preserving financial performances and fostering corporate sustainability.

This study recommends fostering mandatory non-financial disclosure to increase corporate transparency fostering the sustainability transition of the Agri-Food and Beverage industry.

The paper highlights global mandatory non-financial disclosure effects on financial performance considering a sector that is cross-cutting impactful on plural sustainability issues.