Browse Prior Art Database

Bobbin Set for a Low Profile, Safety Approved Transformer

IP.com Disclosure Number: IPCOM000057227D
Original Publication Date: 1988-Apr-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Christensen, J Johari, G [+details]

Abstract

Power supplies often require that signals be transmitted from secondary to primary circuits. Footprints and profiles are often restrictive due to the shrinking nature of modern electronic equipment. The primary problem is that small transformers often do not satisfy the electrical insulation requirements established by certain standards. In particular, the safety problems of prior art devices are in the area of: a. Insulation thickness between primary and secondary b. Creepage and clearance between primary and secondary Presently, these problems are solved by using high profile bobbins with EE-24-25 cores and taping for insulation. Although the bobbin is simple, the large footprint and high profile do not accommodate one inch thick or densely populated power supplies.