| 摘要 |
#CMT# #/CMT# The transformer has two windings arranged on a single or multiple layered base printed circuit board (1) and a single or multiple layered daughter printed circuit board (2) respectively, where the windings are formed as conductive paths. The daughter printed circuit board is completely sealed as a separate part with a casting resin (3) and is attached to the base printed circuit board. The circuit boards are connected with each other for producing electric connections, and guide openings (5) for a cover bracket (6) of an E or F core (7) are inserted into the circuit boards. #CMT#USE : #/CMT# Transformer for a switching regulator and a forward converter of a switching power supply. #CMT#ADVANTAGE : #/CMT# The daughter printed circuit board is completely sealed as the separate part with the casting resin and is attached to the base printed circuit board, thus providing a flat design for the transformer in a cost-effective manner, and completely electrically insulating the daughter printed circuit board of the transformer, and hence avoiding safe distance of the transformer. The conductive paths of the transformer are thus tightly packed, and hence reducing dimensions of the transformer, and easily adapting the conductive paths to different windings of the transformer. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a cross sectional view of a transformer. 1 : Base printed circuit board 2 : Daughter printed circuit board 3 : Casting resin 5 : Guide openings 6 : Cover bracket 7 : E or F core. |
