This work presents a comparative analysis among four power MOSFET technologies: conventional Silicon (Si), Superjunction (SJ), Silicon Carbide (SiC) and Gallium Nitride (GaN), indicating the voltage, current and frequency ranges of the best performance for each technology. For this, a database with 91 power MOSFETs from different manufacturers was built. MOSFET losses are related to individual characteristics of the technology: drain-source on-state resistance, input capacitance, Miller capacitance and internal gate resistance. The total losses are evaluated considering a drain-source voltage of 400 V, power levels from 1 kW to 16 kW (1 A–40 A) and frequencies from 1 kHz to 500 kHz. A methodology for selecting power MOSFETs in power electronics applications is also presented.

A design methodology for minimum volume of LCL filters applied to grid connected converters is proposed. It combines the determination of filter parameter values (inductances and capacitances) to hardware design (component technology and inductor construction). Using the proposed strategy, different combinations of L-C-L that meet standard restrictions are determined. The influence of the harmonic content that results from filter design is considered in order to estimate component losses, and filter and bus capacitor lifetimes. Results are presented for filters that lead to the smallest volume, highest capacitor lifetime, or a compromise between both. A case study with three different magnetic material technologies and two types of capacitors is done. The design methodology is experimentally validated for a 1 kW converter. Step-by-step procedures for the determination of filter parameters and inductor hardware design are provided.

A simple and accurate analytical model for the estimation of switching losses on power MOSFETs is proposed. It consists of simplifying the non‐linear behaviour of Miller capacitance as a function of voltage. Experimental results are used to validate the model in the 5–500 kHz range. The proposed analytical model is compared to other frequently used methods. Results confirm the accuracy of the proposed model in different voltage levels, using four different MOSFET part numbers, spanning three technologies: SiC, superjunction, and conventional silicon. Because of its simplicity of implementation, it is especially recommended for applications that design converters by evaluating a large database of transistor part numbers.

This paper presents the design, model, and control of a Dynamic Wireless Power Transfer System (DWPT) for a 30 kW electric vehicle charger application. This system allows electric vehicles to receive electric power while running along a road, preserving or even charging its internal battery. The system features primary coils embedded along the road, powered by DC/AC converters connected to a DC bus. The paper presents the system overview and its mathematical model, considering the dynamic behavior of self-inductance and mutual inductance over time. Additionally, a sequencing technique is presented for primary coil selection and activation based on induced current, accounting for motion and misalignment of the secondary coil without relying on the presence of sensors or timing methods. To optimize power delivery, a modified extremum seeking control is designed for autonomously tracking resonance frequency and ensuring soft-switching of power electronic components. This design aligns system components to operate within a predetermined frequency range and power, enhancing overall efficiency. The presented DWPT system is demonstrated through simulations and validated in full-scale experiments using a DS3 Crossback car from Stellantis, recharging the vehicle up to 30 kW under dynamic conditions. Results showcase a maximum efficiency of 90.2% from the DC bus on the primary side to the battery over an 18 m electrical road, highlighting the robustness and effectiveness of the system.

This work presents a design for uninterruptible power supply inverters using Pareto front optimization for improved cost and efficiency. Three PWM modulation techniques applied to the full-bridge inverter are analyzed. As a result, the best MOSFET design solution in terms of the cost and efficiency of the inverter is evaluated based on a database with 47 power MOSFETs. Using the Pareto front, the optimal and sub-optimal solutions are compared, considering the three modulation techniques and the characteristics of MOSFETs manufactured for different voltage levels. Thermal and electrical measurements are used to validate the models.