Planar Power Magnetics; Cost Effective, Low-Profile Transformer and Inductor Designs, Part 2

Focus:

For those who have read part 1 of this article, this part 2 provides more details on the design and construction of planar magnetic components. Methods used to build components are described including techniques for securing the core assemblies (pressure brackets or glue) and use of double-sided versus multilayer PCBs for prototyping or final assembly of windings. Also discussed are the choices of core styles and core vendors, options for creating low-profile core structures such as mixing and matching cores and lids and grinding; PCB material options; winding options (rectangular, circular, or stadium-style windings), spacing between windings and the relevant spacing standards; and use of prototyping boards to develop new designs. The article also includes examples of commercially available planar magnetic assemblies, where they are used and their advantages over non-planar components. Article concludes with a description of planar integrated magnetics and provides a list of references for more information on planar magnetics design.

What you’ll learn:

• How to construct planar magnetic components including assembly of cores and windings
• How to create prototypes of planar magnetic components

Notes:

This article originally appeared in the August 2002 issue of Magnetics Business & Technology magazine.

View the Source

Author & Publication:

Ed Bloom, e/j BLOOM associates Inc, Magnetics Business & Technology, Sep 01 2002

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