Functional synthesis of switches in the switching cell

This file follows on from the [D 3 075] file, which presents the objectives of power electronics, the concepts of passive, active and source dipoles, as well as the rules for connecting sources and the concept of the switching cell.

In this dossier on switching, we propose a systematic approach oriented towards synthesizing the switches of a switching cell used to perform a controlled energy transfer between two complementary energy sources. We study the links between static switch characteristics and the intrinsic reversibility of the sources, on the one hand, and between dynamic characteristics and energy exchange management, on the other.

We first show, in paragraph 1 , that the requirement for "fast" switching of the cell's switches (a few tens of nanoseconds to a few microseconds depending on electronic switch structures) makes any attempt at complementary switching of their resistivity extremely delicate, if not dangerous. Indeed, due to the unavoidable dispersion of delays in the control and in the switches themselves (intrinsic delays and thresholds), the simultaneous conduction or blocking, even fleeting, of both switches is likely to cause an unacceptable overcurrent or overvoltage. Paragraph 1 therefore deals with the basic principles of switching that need to be understood in order to implement a "controlled" switching cell, while respecting the fundamental causal relationships between the switches. Based on these principles, paragraph