IPCalculus - Planar Transformer Patenting Activity by ipcalculus

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									                  Patenting activity in Planar Transformer




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Overview
 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 ‘wire-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 ‘wire-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




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Patent distribution by top IPC class




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Patent distribution by Priority year




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Issued and Published Patent Distribution
by Application year




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Issued and Published Patent Distribution
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Issued and Published Patent Distribution
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About IPCalculus

      IPCalculus is an Intellectual Property research & analytical consulting firm
      based in India, providing customized services in the form of Patent landscape
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