Patent ID: 6982623
Filing Date: 2006-01-03
Classification: H01F,H05B

Abstract:
1. A step-up transformer for magnetron driving, comprising: a magnetic circuit, including a middle core section, an outer core section and a coupling core section for coupling the middle core section and the outer core section, formed by an arrangement of two ferrite cores opposed to each other with a gap interposed therebetween, and a primary winding and a secondary winding arranged to surround the middle core respectively, wherein a sectional area of the middle core is increased; a number of winds in a radial direction of the primary winding to be wound around the middle core is increased and a number of winds in an axial direction is decreased; a number of winds in a radial direction of the secondary winding is increased and a number of winds in an axial direction is decreased; the primary winding and the secondary winding are provided close to each other interposing an insulator, and a sectional area of the outer core is set to be smaller than that of the middle core, wherein a height of a cross section of the outer core is smaller than a height of a cross section of the middle core.