MAGNETIC CORE OF A THREE-PHASE MAGNETIC INDUCTION APPARATUS AND MAGNETIC CORE FRAME Russian patent published in 2022 - IPC H01F27/25 H01F30/12 

FIELD: electrical engineering.

SUBSTANCE: invention relates to three-phase magnetic induction apparatus, in particular, to cores with a magnetic circuit, used in transformers, coils, throttle valves. Magnetic core of a three-phase magnetic induction apparatus comprises three frames, wherein each frame is made of a strip of a magnetic material. Said frames are arranged in the magnetic core so that the external surfaces of the frames face each other, structurally forming a triangular prism. Each of the frames is formed by a multilayer structure, each layer whereof is represented by a rectangular spiral with a pitch of 0.1 to 0.3 of the thickness of the strip laid so as to form such stepped structures on the internal and external surfaces of the frame that the internal part of said structure forms an approximated circumference and the external part thereof forms a plane at an angle of 30 degrees to the plane of the frame, displaced from the centre of said circumference. The stepped structures of one frame do not come into contact with the stepped structures of the adjacent frames, forming a gap between said frames.

EFFECT: increase in the manufacturability and reduction in losses in the loop closure gaps.

2 cl, 4 dwg