Loïc Michel

FPGA Implementation of an Optimal IGBT Gate Driver Based on Posicast Control

In this paper, we propose an insulated gate bipolar transistor (IGBT) gate driver that provides an optimal gate signal to manage the IGBT switching mechanism, without the need of a feedback current measurement across the parasitic inductance of the circuit. Our approach is based on the Posicast method, which allows determining an optimal gate signal shape from pulses whose characteristics are determined from the IGBT model. Experimental results demonstrate the effectiveness of the proposed method to minimize electrical switching constraints.

Development of an efficient IGBT simulation model

We propose, in this paper, the development of an efficient IGBT model especially designed for simulation and the associated free wheeling diode model that can describe the recovery current. Although, the IGBT model can describe the switching mechanism with a good precision, a procedure is presented in order to make this model able to reproduce better switching losses. Both models have the advantage to be configured exclusively from the datasheets and are built as electrical circuits, which can be realized easily in classical simulators.

Physical and system power electronics simulator based on a SPICE kernel

A simulation software, based on a SPICE kernel, is presented in order to study the interaction between power components and their drivers. It provides a complete environment to perform simulation of power electronics systems and their associated digital control laws. Efficient IGBT and diode models, which describe accurately a wide variety of IGBT and freewheeling diode components, are included with an integrated tool for the extraction of their parameters. This software enables users to study the effect of accurately modeled power components on controlled power converters. Examples are presented to demonstrate the performance of the software package.

Linear PDM-Dual control for current-fed-inverter

PDM-dual control adapted to a set rectifier - parallel resonant inverter makes it possible to implement an AC/AC converter with good performances (cost, size, efficiency and power-factor). The main disadvantage of this AC/AC converter is a bad distribution of the current in semiconductor switches. To solve this problem, we propose a more suitable form of this control: linear PDM-dual control. It is based on a linear modulation of the PDM duty cycle. A theoretical analysis is achieved and results are validated by simulation.