Patent ID: 9142349
Filing Date: 2015-09-22
Classification: H01F,Y10T

Abstract:
1. A method for making a transformer, comprising the steps of: (a) connecting a plurality of laminate units to form a core unit by the steps of: alignedly overlapping said laminated units in such manner that each two of said laminate units of the same level are overlapped to form a coupled unit of laminate units wherein said coupled units of laminate units are configured at different levels; and sequentially overlapping said coupled units of laminate units at said different levels in an alternating manner to couple said coupled units of laminate units with each other; (b) configuring said core unit to have at least a main column, two side columns, two upper yokes, and two lower yokes; (c) defining a plurality of joint portions between said upper yokes and said main column, between said upper yokes and said side columns, between said lower yokes and said main column, and between said lower yokes and said side columns; (d) reserving a seaming width at each of said joint portions for decreasing a DC magnetic bias effect; and (e) providing a positioning hole at each of said laminate units to secure said laminate units together via a screw unit for ensuring said seaming width to be retained at each of said joint portions.