Abstract: A method for manufacturing a non-circular wound magnetic core composed of a nano-crystallized soft magnetic alloy thin strip comprises: a step for acquiring a multilayer body by winding a soft magnetic alloy thin strip; a step for nano-crystallizing the soft magnetic alloy thin strip by inserting a heat treatment inner peripheral jig to the inner peripheral side of the multilayer body, maintaining the multilayer body in a non-circular shape, and subjecting the multilayer body to a heat treatment; and a step for maintaining the nano-crystallized multilayer body in the non-circular shape by using outer and inner peripheral jigs and impregnating resin between the layers of the multilayer body. The resin impregnation inner and outer peripheral jigs are shaped so as to not contact the inner peripheral surface and/or the outer peripheral surface of the multilayer body at a part where the multilayer body has a large degree of curvature.

Abstract: A method for manufacturing a non-circular wound magnetic core composed of a nano-crystallized soft magnetic alloy thin strip comprises: a step for acquiring a multilayer body by winding a soft magnetic alloy thin strip; a step for nano-crystallizing the soft magnetic alloy thin strip by inserting a heat treatment inner peripheral jig to the inner peripheral side of the multilayer body, maintaining the multilayer body in a non-circular shape, and subjecting the multilayer body to a heat treatment; and a step for maintaining the nano-crystallized multilayer body in the non-circular shape by using outer and inner peripheral jigs and impregnating resin between the layers of the multilayer body. The resin impregnation inner and outer peripheral jigs are shaped so as to not contact the inner peripheral surface and/or the outer peripheral surface of the multilayer body at a part where the multilayer body has a large degree of curvature.