Patent ID: 7877861
Filing Date: 2011-02-01
Classification: H01F,Y10T

Abstract:
1. A method of making a transformer comprising: (a.) providing a plurality of first and second outer leg plates; (b.) providing a plurality of inner leg plates: (c.) providing a plurality of unitary first yoke plates, each of the first yoke plates having an outer side and an inner side with a V-shaped notch formed therein, wherein the V-shaped notch is located inwardly from the outer side; (d.) positioning the inner leg plates, the first yoke plates and the first and second outer leg plates to form first and second outer legs, a first yoke with a first groove, and an inner leg having a first end disposed in the first groove, wherein the first outer leg comprises the first outer leg plates, the second outer leg comprises the second outer leg plates, the first yoke comprises the first yoke plates, and the inner leg comprises first and second stacks of the inner leg plates disposed side by side, with edges of the inner leg plates of the first stack abutting edges of the inner leg plates of the second stack, wherein the first groove extends in a stacking direction of the first yoke and is formed by the V-shaped notches of the first yoke plates; and (e.) mounting a coil winding to the inner leg.