Thermo magnetic FEM modeling of a PMS motor using experimental data

??Nowadays, the requirements to reduce greenhouse gas emissions and to provide an healthy and more habitable environment, has led to the development of several sustainable alternative for an eco-mobility. Since the improvement of internal combustion engine has reached a steady state point in terms of overall efficiency, the increasingly stringent requirement imposed by international normative standards leading automotive companies to find other alternatives to reduce pollution. Thanks to the exponentially growth of the power electronics, the huge interest on research of high energy and power density batteries and the more integration of the embedded systems, the central role of the electric drive has taken over on the most vehicle applications. The wide use of permanent magnets synchronous motors for electric vehicle application has rapidly spread out, thanks to their capability to provide high torque and efficiency with low weight and size. Since the natural behavior of permanent magnets to demagnetize under severe conditions, both coupled thermal and magnetic, the necessity to understand and predict the phenomena is mandatory. This paper carry out the performance analysis in duty cycle, through real CAN and GPS readings in relevant pathway, with discussion of numerical and graphic technical evaluations. Finite element software has also been used for electromagnetic and thermal calculation in order to set the working point of the magnets and to establish the temperature distribution in the motor itself during the whole thermal transient. A particular overview is done on the dependence of material used and different cooling solutions adopted.