ipcalculus - planar transformer patenting activity

8/6/2019 IPCalculus - Planar Transformer Patenting Activity

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Patenting activity in Planar Transformer



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Over view


Historically, the capabilities and size of transformer units were limited by the

frequency that the switching transistors were able to operate at, 20kHZ being

the best one could expect. However, MOSFETs smashed this barrier apart,offering switching frequencies in excess of 250kHZ. Thus the limiting step of low

switching frequencies had been removed from transformer design. This in turn

was now replaced by the next limiting step: namely the physical design of

the traditional µwire-wound¶ transformer itself .

It is Planar transformers that overcome this new limiting step, resolving many

of the problems of traditional wire-wound transformers and provide significant

reductions in the size and weight, improved efficiencies and much simpler

manufacturing methods.The name planar implies that the geometry of these transformers is more of a

two-dimensional component, rather than the traditional three-dimensional wire-

wound equivalents. Planar technology comprises two major design features

that distinguish it from the old-fashioned µwire-wound¶ transformers:

1. The windings are replaced by flat copper foil lead frames and can even be

embedded into a printed circuit board

2. These flat windings are then mounted between thin, very lightweight, ferrite

cores




Technology classification

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Patent distribution by top Assignee





Geographical patent distribution

Geographical patent distribution with Country code, patent count and percentage





Patent distribution by top IPC class





Patent distribution by top US class





Patent distribution by top ECL A class





Patent distribution by Application year





Patent distribution by Publication year





Patent distribution by Priority year




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Issued and Published Patent Distribution

by Application year





by Publication year





by Priority year




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ipcalculus - planar transformer patenting activity

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