A magnetic and electrical circuit element including magnetic-flux-conducting posts, and a multi-layer structure formed with an electrically-conductive material. The multi-layer structure includes multiple layers forming a stack of layers along a length of the posts, said multi-layer structure configured as primary and secondary windings of a transformer. The primary winding is embedded in the multi-layer structure and wound around the magnetic-flux-conducting posts in such a way that a magnetic field induced in each of the magnetic-flux-conducting posts has a magnetic field polarity opposite to a polarity of the respective magnetic field of the magnetic-flux-conducting post adjacent the respective magnetic-flux-conducting post. Around each of the magnetic-flux-conducting posts, there is a respective one of the secondary windings connected to a semiconductor device. The magnetic-flux-conducting posts are connected magnetically by continuous magnetic-flux-conducting plates, each of which is shaped to ensure a continuous flow of the magnetic field successively through adjacent magnetic-flux-conducting posts.

A planar transformer, a power conversion circuit, and an adapter, is provided to improve noise suppression performance. The planar transformer includes a magnetic core and a printed circuit board (PCB) winding board, where the PCB winding board includes a primary winding, a secondary winding, a shielding winding, and a compensation winding. In embodiments of this disclosure, the shielding winding and the compensation winding that has a plurality of turns of coils are disposed between the primary winding and the secondary winding of the planar transformer. The shielding winding can shield electric field coupling between the primary winding and the secondary winding, thereby suppressing a noise current between the primary winding and the secondary winding. Common mode noise generated by the compensation winding cancels common mode noise flowing to the secondary winding or the primary winding, to minimize common mode noise of an entire system.

Present disclosure relates to a transformer structure. The transformer structure includes a first inductor and a second inductor. The first inductor has first turns and second turns. The second inductor has third turns and fourth turns. The first turns of the first inductor and the third turns of the second inductor are mutually disposed in a first area of a first metal layer. The second turns of the first inductor and the fourth turns of the second inductor are mutually disposed in a second area of the first metal layer. The first area is adjacent to the second area.

A coil apparatus includes a coil unit including a coil, a base core that is a first core component, and a core module that is a second core component. The first core component includes a center leg that is a leg around which the coil is wound. The second core component includes a plurality of core segments arranged in a row with gaps between them. The second core component is connected to the leg to form a magnetic path together with the first core component.

In a coil device of a power conversion device, a laminated coil includes planar coils laminated on a surface of a support. A plurality of cores are spaced apart from each other and aligned in a longitudinal direction of the planar coils, and each core includes a portion around which the laminated coil is wound on the surface of the support. A first protruding member (is arranged between a pair of cores adjacent to each other with respect to a longitudinal direction and is fixed to the support. A first fixing member is arranged above the first protruding member. The laminated coil is sandwiched and fixed between the first fixing member and the first protruding member such that a first surface is in contact with the first protruding member and a second surface is in contact with the first fixing member.

A power converter includes a circuit board, a first magnetic core, and a housing. The circuit board includes an insulating substrate and a first coil conductor. The insulating substrate includes a first side surface. The first magnetic core includes a first magnetic core member and a second magnetic core member. A first side surface of the insulating substrate is opposed to a first portion of the housing and is spaced away from the first portion of the housing. The first magnetic core member and the second magnetic core member are both thermally connected to the first portion.

A magnetic component includes a plurality of coils magnetically coupled with each other; and a core forming a closed magnetic circuit. At least part of portions in inner periphery side regions of respective plurality of coils are arranged overlapping with each other in a coil axial direction. When viewed from the coil axial direction, at least one of the coils is defined as a specific coil, and a region of the specific coil from an inner periphery edge to an outer periphery edge thereof in a coil radial direction is defined as a specific coil region, and the specific coil region has a portion which is not overlapped with at least one coil in the coil axial direction other than the specific coil that constitutes the specific coil region, in a region from the inner periphery edge to the outer periphery edge thereof in the coil radial direction.

A planar winding transformer includes a magnetic core set and a multilayer circuit board. The magnetic core set includes two magnetic cores and two magnetic columns. The two magnetic cores are parallel to each other. The multilayer circuit board is disposed between two magnetic cores, and two magnetic columns penetrate through the multilayer circuit board. The multilayer circuit board includes two low voltage winding layers and one high voltage winding layer. Two low voltage winding layers are connected to each other in parallel, and the high voltage winding layer is disposed between two low voltage winding layers. When the high voltage winding layer receives a polarity current, at least one of the low voltage winding layers generates a corresponding induced current. Two magnetic cores and two magnetic columns form a closed path for magnetic flux.

A transformer includes a magnetic core set and 2N pairs of windings. The magnetic core set includes a first magnetic core, a second magnetic core, a first magnetic column, and a second magnetic column. Each of the pairs of windings includes a high-voltage side winding and a low-voltage side winding. Each of the pairs of the windings surrounds one of the first and the second magnetic columns. The surrounding direction of the high-voltage side windings surrounding the firs magnetic core is opposite to the surrounding direction of the high-voltage side windings surrounding the second magnetic core.

Embodiments disclosed herein include power transformers for microelectronic devices. In an embodiment, a power transformer comprises a magnetic core that is a closed loop with an inner dimension and an outer dimension, and a primary winding around the magnetic core. In an embodiment, the primary winding has a first number of first turns connected in series around the magnetic core. In an embodiment, a secondary winding is around the magnetic core, and the secondary winding has a second number of second turns around the magnetic core. In an embodiment, individual ones of the second turns comprise a plurality of secondary segments connected in parallel.