Three-phase magnetic cores for magnetic induction devices and methods for manufacturing them

Abstract

Three-phase magnetic cores for magnetic induction devices (e.g., transformers, coils, chokes), and methods for manufacturing them, are disclosed. The magnetic cores are generally constructed from three generally rectangular magnetic core frames having a stair-stepped configuration extending along side portions of the frames. The frames are arranged to form a triangular prism structure such that side portions of locally adjacent frames are uniformly engaged to form three core legs over which coils of a three-phase magnetic induction device may be placed.

Description

technical field [0001] The present invention relates to three-phase magnetic induction devices, magnetic circuit cores used in such devices, and methods for their manufacture. Background technique [0002] Magnetic induction devices (eg, power transformers, choke coils, etc.) are designed to transfer electrical energy between inductively coupled wound conductors (coils) based on mutual inductance effects. For example, in a power transformer, an alternating current supplied to a primary winding that is inductively coupled to the transformer core creates a magnetic flux in the core that induces an electromotive force (EMF) or Voltage. [0003] A three-phase transformer typically includes a magnetic core circuit and three coil modules inductively coupled to the magnetic core circuit. Each coil module is usually constructed from a primary winding and a secondary winding. State-of-the-art three-phase power transformers typically utilize a so-called "E+1" core construction (in ...

AI Technical Summary

Problems solved by technology

However, the interleaved ring structure proposed in this patent requires very complex production techniques, especially when manufacturing power transformers

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