A magnet flux absorber of the present invention has a soft magnetic layer having a first surface and a second surface that is a back surface of the first surface, as well as and at least one magnetically pinning portion that faces a part of the first surface of the soft magnetic layer or a part of the second surface of the soft magnetic layer. A region of the soft magnetic layer that faces the magnetically pinning portion is magnetized by the magnetically pinning portion in a direction that is different from a direction in which at least a part of remaining region of the soft magnetic layer is magnetized.

Disclosed is a coil including a first conductor disposed on a first plane, a second conductor disposed on a second plane different from the first plane, and including a first end electrically connected to a first end of the first conductor, and a second end positioned near a second end of the first conductor, and a third conductor disposed on the first plane, and including a first end electrically connected to the second end of the second conductor, and a second end positioned near the first end of the second conductor, wherein a pattern of the first conductor connecting the first end of the first conductor from the second end of the first conductor is in a clockwise or counterclockwise direction when the first plane is viewed from a first side, and wherein a pattern of the third conductor connecting the second end of the third conductor from the first end of the third conductor is in a direction opposite to the direction of the pattern of the first conductor when the first plane is viewed from the first side.

The present disclosure is related to a transformer. The transformer includes a core group, a first coil and a second coil. The core group includes two external portions and a middle portion. The middle portion is located between the two external portions. The middle portion has an upper section, a middle section and a lower section. Each of the upper section and the lower section has a first gap between one of the two external portions. The middle section has a second gap between one of the two external portions. The first gap is different from the second gap. The first coil surrounds the lower section of the middle portion. The second coil surrounds the upper section of the middle portion.

A magnetic structure in a power converter includes at least two multilayer boards, such as a primary board containing the primary windings and some auxiliary windings, and a secondary board containing the secondary windings and some auxiliary windings. The primary and secondary boards are on top of each other. On the layer on the primary bard adjacent to the secondary board, is a dual function shield to reduce the total common mode noise in the converter towards zero. The controlled dual function shield can be placed on the secondary board on the layer adjacent to the primary board, and in some embodiments can be placed on both primary and secondary board on the layers adjacent to the other board. The embodiments herein offer a very good solution for cost reduction of the planar transformers and offers an avenue for total elimination of the common mode noise in a power converter.

In one aspect, described is a magnetic-core inductor design approach that leverages NiZn ferrites with low loss at RF, distributed gaps and field balancing to achieve improved performance eat tens of MHz and at hundreds of watts and above. Also described is an inductor design which achieves “self-shielding” in which the magnetic field generated by the element is wholly contained within the physical volume of the structure rather than extending into space as a conventional air-core inductor would. This approach enables significant reductions of system enclosure volume and improvements in overall system efficiency.

A magnetic unit is presented. The magnetic unit includes a magnetic core. The magnetic core includes a first limb and a second limb disposed proximate to the first limb, where a gap is formed between the first limb and the second limb. The magnetic unit further includes a first winding wound on the first limb. Moreover, the magnetic unit includes a conductive element disposed facing an outer periphery of the first winding, where the conductive element is configured to control a fringing flux generated at the gap. Further, the magnetic unit includes a heat sink operatively coupled to the conductive element, where the conductive element is further configured to transfer heat from at least one of the conductive element and the first winding to the heat sink. Moreover, a high frequency power conversion system and a method of operation of the magnetic unit is also presented.

A coupled inductor for low electromagnetic interference includes a plurality of windings and a composite magnetic core including a coupling magnetic structure formed of a first magnetic material and a leakage magnetic structure formed of a second magnetic material having a distributed gap. The coupling magnetic structure magnetically couples together the plurality of windings, and the leakage magnetic structure provides leakage magnetic flux paths for the plurality of windings.

A coil component includes a body including a magnetic metal powder, and a coil portion in the body. First and second external electrodes are disposed on one surface of the body and connected to the coil portion, and a third external electrode includes a pad portion disposed on the one surface of the body and a side surface portion disposed on at least one side surface of the body. An insulating layer covers surfaces of the body other than the one surface and has an opening exposing the side surface portion of the third external electrode. A shielding layer is disposed on the insulating layer and is connected to the side surface portion of the third external electrode through the opening.

A coil component includes a body having a bottom surface and a top surface opposing each other in one direction, and a plurality of walls each connecting the bottom surface to the top surface of the body; a coil portion buried in the body, and having first and second lead-out portions; first and second external electrodes disposed on the bottom surface of the body and spaced apart from each other; via electrodes penetrating through the body and connecting the first and second lead-out portions and the first and second external electrodes to each other; a third external electrode including a pad portion disposed on the bottom surface of the body, and a connection portion extending to portions of the plurality of walls of the body, and spaced apart from the first and second external electrodes; a shielding layer including a cap portion disposed on the other surface of the body, and side wall portions respectively disposed on the plurality of walls of the body, and connected to the third external electrode; and an insulating layer disposed between the shielding layer and the body, and between the first to third external electrodes and the body.

The present disclosure discloses an inductive device manufacturing method that includes the steps outlined below. An inductive unit is formed in an integrated circuit. An electromagnetic radiation test is performed thereon. When an amount of electromagnetic radiation exceeds a radiation threshold value, a shielding structure is formed. The shielding structure has a width and a distance separated from the inductive unit such that a decreasing amount of a quality factor of the inductive unit is not larger than a first predetermined value and a shielded amount of electromagnetic radiation is not lower than a second predetermined value. The inductive unit has a symmetric shape and the inductive device further includes a single asymmetric inductive portion. The closed shape of the shielding structure encloses the inductive unit and covers the single asymmetric inductive portion. A part of the single asymmetric inductive portion extends along a peripheral direction of the shielding structure.