Transformers and inductors

Transformers and inductors belong to the family of passive components and are used in all areas of electronics.

A distinction must be made between different areas:

• industrial distribution (high-voltage) ;

• the professional ;

• microelectronics ;

• very high frequency ;

for which these components play a fundamental role in converter operation, galvanic isolation and filtering.

The technological evolution of transformers and inductors is currently linked to a need for miniaturization (particularly observed in telecommunications, airborne and consumer applications) and surface-mounting of components on printed circuits or insulated metal substrates.

Great strides have been made in increasing frequency, and the combination of multi-layer winding technologies and the development of new materials have made it possible to keep pace with this irreversible evolution. But in some cases, thermal and insulation constraints are a brake on miniaturization.

Today, the cost of magnetic components in converters is becoming significant, and a technical and economic dialogue needs to be established between electronics designers and component manufacturers.