Geared devices are commonly used to match the operating speed and torque of the power source with the second mover.
Such geared devices are usually mechanical gears. As counterparts of the conventional mechanical gears, magnetic gears (MGs) are becoming promising devices, mainly due to the merits of physical isolation between moving parts, no gear lubrication, no mechanical fatigue, inherent overload protection and reduced maintenance, etc.
In collaboration with Politecnico di Torino, we have developed, patented and prototyped a differential and a magnetic gearbox based on the MGs tecnology.
MULTIPHYSICS MODELLING OF ELECTRIC CONTACTS
Industrial applications such as power switches, micro-connectors, electric resistance welding (ERW), and metal forming are related to electrical contacts. Electrical contact problems are particularly complex to simulate because of their intrinsic multiphysics and multiscale behavior. Electrical, thermal, and mechanical coupled problems have to be considered at the same time, on different spatial scales. Analysis of multiphysics and multiscale problems is typically computationally resource demanding if commercial software is used.
Our current interest is to develop: a) Domain decomposition approaches which are able to analyze independently disconnected parts and to resolve physics on different spatial scales; b) New (low-order) numerical methods to reduce computational complexity; c) Semi-analytical methods to describe the physics behavior at the interface between contacting parts.
NUMERICAL METHODS FOR THE DESIGN AND OPTIMIZATION OF LOW AND HIGH FREQUENCY EM DEVICES
The need of reducing the weight, size, and cost of electric and electronic devices has been a constant trend over the years. For this purpose, the switching frequency has always been increasing, in order to reduce the passive components’ dimensions, and therefore, the weight, size, and cost of the overall system. Thus, more and more sophisticated and dense electric systems are being and will be adopted causing increasing electromagnetic compatibility problems which may jeopardize the functionality of safety-related systems and the security of data due to both unintentional or malicious interference. This in turn increases the need for numerical simulations, required during the design stage of new components and other steps of the process, e.g. pre-certification.
In this general context, we develop new numerical tools with the aim of addressing the main shortcomings of the existing commercial software and numerical tools for this class of problems.
WIRELESS POWER TRANSFER
After about two decades of growing research interest in wireless charging systems for electric vehicles (EVs), the technology of recharging by means of resonant coupled inductors, commonly referred to as wireless power transmission (WPT), is capturing the interest of the automotive industry.
Indeed, various companies are developing their own products for the static charging, i.e. the charging taking place when the vehicle is not moving and the misalignment is constrained within a defined limit.
In this context, we design and analize this kind of devices for specific requirements and enviromental contdition, with outcomes both in the scietific literature and in the area of technology transfer.