Patent ID: 9373440
Filing Date: 2016-06-21
CPC Classification: H01F

Claim Text:
1. A composite transformer with a longer creepage distance, comprising: a primary winding rack including two coaxial winding portions to hold respectively a primary winding and a secondary winding, two wiring portions at two opposite sides of the two winding portions, a separated portion with two spacers spaced from each other to form a spaced section and separate the two winding portions, and an installation channel to hold an iron core set which runs through the two winding portions and forms magnetic coupling with magnetic paths generated by the primary winding and the secondary winding upon being energized by electricity, wherein the winding portions directly connect to the spacers, respectively; and an insulation support rack which is installed on the primary winding rack and includes a first insulation half shell and a second insulation half shell that are corresponding to each other and coupled to encase at least one of the two winding portions, the first insulation half shell and the second insulation half shell including respectively a first encasing portion and a second encasing portion to encase two sides of the at least one of the two winding portions, the first encasing portion and the second encasing portion including respectively a first insulation portion and a second insulation portion corresponding to the separated portion and extending into the spaced section, and a first isolating portion and a second isolating portion extended from the first insulation portion and the second insulation portion respectively to cover another two sides of the at least one of the two winding portions, the first isolating portion including a first covering section extended towards the second isolating portion to cover the second isolating portion, the second isolating portion including a second covering section extended towards the first isolating portion to cover the first isolating portion, wherein the first covering section and the second covering section are overlapped and cover the spaced section and one of the spacers.