Abstract: A common mode choke coil has a core including a winding base, and a first and a second wire wound around the winding base side by side. The winding base includes a first area and a second area. The first area is from a first end of a region where the first wire is in contact with the winding base to a first point in the region. The second area is from a second end, which is opposite to the first end, of the region to a second point in the region. The second area does not overlap with the first area. When the first and second wires on a same turn are compared with each other, in the first area, the first wire is located nearer the first end, and in the second area, the first wire is located nearer the second end.

Abstract: A dual-purpose transformer may be oriented in a plane perpendicular to planes in which printed circuit boards connected thereto are oriented, thereby providing structural support for a framework that can include a dense arrangement of internal power adapter components, in addition to stepping down voltage. Methods for ultrasonic welding are also provided and may be used to concurrently assemble, join and press-fit power adapter housing components. A ground lug is also provided that is shaped and located within a cover piece of a power adapter housing to allow for blind mating with a printed circuit board during an assembly process.

Abstract: A chip electronic component may include: a magnetic body including an insulating substrate; internal conductive pattern parts disposed on at least one surface of the insulating substrate; external electrodes disposed on the magnetic body and connected to the internal conductive pattern parts; and an additional magnetic layer disposed on a bottom surface of the magnetic body and covering portions of the external electrodes disposed on the bottom surface of the magnetic body.

Abstract: A coil device (1) comprising a coil winding (3) for an electromagnetic actuating device or an electromagnetic sensor, having a winding wire (11) which has an insulating element and which is ran to at least one contacting element (5, 15) that is designed as a metal part, in particular a stamped part, and a stripped section of the winding wire is received at the contacting element between the contacting element (5, 15) and a metal cover (6) and fused to the contacting element (5, 15). A recess (8) is impressed into the contacting element (5, 15), the recess receiving the winding wire (11) in some sections and being designed with a winding wire inlet geometry.

Abstract: An inductor coil for an inductive energy transfer system includes multiple layers of a single wire having windings that are interlaced within at least two of the multiple layers such that both an input end and an output end of the wire enter and exit the coil on a same side of the coil. The input end and the output end of the wire may abut one another at the location where the input and output wires enter and exit the inductor coil. The wire can include one or more bundles of strands and the strands in each bundle are twisted around an axis extending along a length of the wire, and when there are at least two bundles, the bundles may be twisted around the axis. At least one edge of the inductor coil can be formed into a variety of shapes, such as in a curved shape.

Abstract: In accordance with an embodiment, a semiconductor device comprises a semiconductor die, an interposer, and conductive bumps bonding the semiconductor die to the interposer. The semiconductor die comprises a first metallization layer, and the first metallization layer comprises a first conductive pattern. The interposer comprises a second metallization layer, and the second metallization layer comprises a second conductive pattern. Some of the conductive bumps electrically couple the first conductive pattern to the second conductive pattern to form a coil. A magnetic layer is positioned within the coil. In another embodiment, a coil is formed on a single substrate, wherein a magnetic layer is positioned within the coil. Other embodiments contemplate other configurations of coils, inductors, and/or transformers, and contemplate methods of manufacture.

Abstract: A printed circuit board mounted with a power module having both a plurality of lead terminals for soldering and at least one screw terminal for screwing includes a through hole which receives the lead terminal and is soldered to the lead terminal, and an electrode section provided with a screw hole fastened to the screw terminal via a screw. A groove is formed between the electrode section and the through hole so as to intersect with two common tangents each connecting, to an outer periphery of a land of the through hole, an outer periphery of a contact area of the electrode section which is in contact with a head bearing surface of a screw or a washer.

Abstract: A polar-type low pass filter includes a low pass filter portion and first, second and third ground conductors, in a laminated body. The low pass filter portion includes parallel resonant circuits including first, second, third and fourth capacitors and inductors, in a series arm, and at least capacitors in a parallel arm thereof. Pattern conductors configuring the first, second, third and fourth capacitors face the first ground conductor and so forth, in a z-axis direction.

Abstract: An improved structure of a transformer includes a bobbin covering at least a portion of a magnetic core set which has a magnetic loop passing through the bobbin, wherein winding grooves and at least one connecting portion extending sideways are provided on the outer peripheral side of the bobbin, and a plurality of notches with lateral openings are provided on the connecting portion. Coils are wound in the winding grooves of the bobbin. The coils have at least a plurality of line ends, each line end passing through a different notch. One positioning pin is embedded in each of the winding grooves near the lateral opening. The positioning pins hold the respective line ends in place by pressing against them. A casing is fitted on the outer peripheral side of the coils to create separation between the coils and the magnetic core set. The casing is provided with a hollow opening such that the outer peripheral side of the coils facing the airflow is exposed to improve the overall heat dissipating efficiency.

Abstract: An electrical contact system is provided for contacting a coil, in particular a coil of a rotational speed sensor, having: a holding body, the holding body being electrically insulated, a line segment, at least one electrical line, the electrical line being surrounded by an electrical insulating layer, at least one spring element, the at least one spring element being electrically conductive, the at least one spring element having at least one opening, the at least one opening forming a cutting edge in at least some regions of its edge, the at least one spring element being pressed with the at least one cutting edge against the line segment in such a way that the at least one cutting edge pierces through the electrical insulating layer and an electrical contact is produced between the at least one spring element and the at least one line segment.

Abstract: A coil terminal has a winding section comprising an end of coiled wire wound therearound. The winding section is bent relative to a remaining section of the coil terminal. The winding section has a proximal wire engagement portion and a distal wire engagement portion spaced away from each other in a longitudinal direction of the winding section, and an intermediate region disposed between the proximal wire engagement portion and the distal wire engagement portion. The wire end is extended in the intermediate region without being wound around the intermediate region.

Abstract: A transformer, according to one possible embodiment, includes: a bobbin part formed by stacking a plurality of bobbins including external connection terminals; and coils respectively wound around the plurality of bobbins. At least one bobbin of the plurality of bobbins includes withdrawing grooves formed in a space between the external connection terminals, the respective coil wound around the at least one bobbin being withdrawn outside the bobbin via the withdrawing grooves and coupled to the external connection terminal.

Abstract: A robotic mower inductive charging station includes a plurality of transmitter coils mounted on a horizontal base structure in a pattern for inductive charging of a robotic mower that may enter and approach the charging station from any direction. The horizontal base structure may have a plurality of slots, perforations or holes covering at least about 50% of the base structure's surface area.

Abstract: A composite transformer with a longer creepage distance includes a primary winding rack and an insulation support rack mounted onto the primary winding rack. The insulation support rack includes a first insulation half shell and a second insulation half shell that have respectively a first encasing portion and a second encasing portion to encase the primary winding rack. The first and second encasing portions have respectively a first insulation portion and a second insulation portion, and a first isolating portion and a second isolating portion extended respectively from the first and second insulation portions. The first isolating portion has a first covering section extended towards the second isolating portion to cover the second isolating portion. The second isolating portion has a second covering section extended towards the first isolating portion to cover the first isolating portion.

Abstract: A portable apparatus includes a case, a coil situated inside the case, a circuit disposed inside the case to receive power based on a first frequency via the coil and to perform communication based on a second frequency higher than the first frequency, and a magnetic shield having a first portion and a second portion stacked one over another in a direction perpendicular to the coil between the coil and an inside of the case, the second portion being closer to the coil than the first portion, wherein permeability of the first portion is higher than permeability of the second portion situated toward the coil with respect to the first frequency.

Abstract: A magnetic component apparatus includes a bobbin having a bobbin body, a first pin rail, a second pin rail, and a longitudinal axis. First and second pin rows are located on the first pin rail. The second pin row is located at an exterior position from the first pin row. A third pin row is located on the second pin rail. The first, second, and third pin rows can be oriented in a direction transverse to the longitudinal axis. A plurality of windings can be located on the bobbin body. Some embodiments can include a fourth pin row located on the second pin rail, the fourth pin row located at an exterior position from the third pin row. In some embodiments one or more wire guide channels can be defined in the first or second pin rails to help keep breakout wires from the plurality of windings separate.

Abstract: A wire-wound electronic component includes a core having a winding base extending in an axial direction, a flange provided at an end of the winding base in the axial direction, and a wire wound around the winding base. An external electrode is provided on a plurality of side surfaces of the flange and is connected to an end of the wire, where the side surfaces are orthogonal to the axial direction. A connecting surface on which the end of the wire contacts with the external electrode is one of the side surfaces that is different from one of the side surfaces that functions as a mounting surface, and the external electrode extends from the mounting surface to the end of the wire in such a manner to turn in a direction same as a winding direction of the wire.

Abstract: A power transformer is provided that includes a first transformer component, a second transformer component; and an electrical insulator. The electrical insulator is disposed between the first transformer component and the second transformer component. The electrical insulator includes a first layer and a second layer. The first layer has a binder fiber. The binder fiber is a staple fiber coated with a binder material. The second layer has an uncoated staple fiber. The first layer and the second layer are bound together with the binder material.

Abstract: Inductive adjustment of the core-fitted coil (16) of an eddy-current distance sensor (11) can be avoided if the coil (16) fills a physically predetermined annular space between the winding support (17) of the plastic coil former (15) and its flanges (18-19) as well as the wall (21) of a pot (20) composed of ferromagnetic material, which is placed over the rearward, smaller flange (18) and whose end face (21) rests against an annular area of the front, larger flange (19) with the same diameter as the pot (20). The ferromagnetic coil core (31) which engages coaxially in the winding support (17) can therefore be arranged on the base (24) in the pot (20) and can therefore be mounted as part of the pot (20).

Abstract: A multi-winding inductor includes a first foil winding and a second foil winding. One end of the first foil winding extends from a first side of the core and wraps under the core to form a solder tab under the core. One end of the second foil winding extends from a second side of the core and wraps under the core to form another solder tab under the core. Respective portions of each solder tab are laterally adjacent under the magnetic core. A coupled inductor includes a magnetic core including a first and a second end magnetic element and a plurality of connecting magnetic elements disposed between and connecting the first and second end magnetic elements. A respective first and second single turn foil winding is wound at least partially around each connecting magnetic element. Each foil winding has two ends forming respective solder tabs.

Abstract: An electrical assembly includes a substrate, a bridge magnetic device disposed on an outer surface of the substrate, and at least one electrical component. The bridge magnetic device includes (1) a magnetic core disposed over and offset from a first portion of the outer surface of the substrate, (2) N windings wound around at least a portion of the magnetic core and electrically coupled to conductors of the substrate, where N is an integer greater than zero, and (3) a ground return conductor disposed on an outer surface of the magnetic core facing the first portion of the outer surface of the substrate. The at least one electrical component is disposed on the first portion of the outer surface of the substrate.

Abstract: A low profile surface mount electromagnetic component such as a power inductor includes first and second core pieces arranged side by side and having longitudinal side walls facing one another. A preformed coil winding includes vertical legs that are received in vertical slots of the facing longitudinal sidewalls of the component. Inset depressed sections are provided in the top surfaces of the first and second magnetic core pieces and receive a main winding section of the coil winding. Surface mount terminal tabs extend on the bottom surfaces of both the first and second magnetic core pieces.

Abstract: Disclosed herein is a coil component that includes first and second terminal electrodes provided on the core. The first wire includes a first lead section extending from a winding core portion toward the first terminal electrode so as to cross the winding core portion, and a first connecting section connected to the first terminal electrode. The second wire includes a second lead section extending from the winding core portion toward the second terminal electrode so as to cross the winding core portion, and a second connecting section connected to the second terminal electrode. The first lead section crosses the second lead section so as to pass under the second lead section. The second connecting section is located closer to a far side in an extending direction of the winding core portion than the first connecting section.

Abstract: A method for winding a coil on an object, wherein the coil includes a plurality of first coils and a plurality of second coils, may have winding the first coils on an exterior circumferences of the second coils, wherein an outer circumferences of the respective second coil is enclosed and in contact with outer circumference of at least three first coils, and wherein cross-sectional area of the second coil is smaller than that of the first coil, and wherein the outer circumference of the at least three first coils are in contact each other.

Abstract: A coil component includes a core formed by a magnetic material, a coil embedded in the core, a part of a terminal portion of the coil protruded from a side surface of the core, and a tabular terminal, a part thereof protruded from the side surface of the core and partly connected with the protruded part of the terminal portion of the coil. The protruded part of the terminal portion of the coil and the protruded part of the tabular terminal are respectively bent toward the bottom surface side of the core along the side surface of the core, and the protruded and bent part o the terminal portion of the coil is arranged between the protruded and bent part of the tabular terminal and the core.

Abstract: A SMD transformer structure includes a substrate unit, a magnetic unit, a coil unit and a shielding unit. The substrate unit includes a support substrate. The magnetic unit includes at least one magnetic material core bar disposed on the support substrate. The coil unit includes at least one transformer coil assembly wound around the magnetic material core bar. The transformer coil assembly includes a plurality of transformer coils wound around the magnetic material core bar, and each transformer coil has two opposite end portions respectively and electrically connected to the corresponding first electrode and the corresponding second electrode of the substrate unit. The shielding unit includes at least one magnetic shielding board disposed on the magnetic material core bar. Whereby, the SMD transformer structure not only can be simplified to reduce its size, but also can be automatically manufactured to increase its production efficiency and product yield (reliability).

Abstract: A choke includes a single-piece core made of a same material, the single-piece core having a first board, a second board, and a pillar located between the first and second boards, a winding space located among the first board, the second board and the pillar, wherein the pillar has a non-circular and non-rectangular cross section having a first axis and a second axis substantially perpendicularly intersecting with each other at a center of the cross section of the pillar, and wherein a circumference of the cross section of the pillar includes two arc edges, four first substantially straight edges substantially parallel to the first axis, and two second substantially straight edges substantially parallel to the second axis, each of the first substantially straight edges being a joint of and in direct contact with one of the arc edges and one of the second substantially straight edges.

Abstract: A distributed active transformer is provided comprising a primary and a secondary winding. The primary winding comprises a first set of conductive vias extending in a direction between a first surface and a second surface of an element, a first set of first electrically conductive lines extending along the first surface, and a first set of second electrically conductive lines extending along the second surface. The secondary winding comprises a second set of conductive vias extending in a direction between the first surface and the second surface, a second set of first electrically conductive lines extending along the first surface, and a second set of second electrically conductive lines extending along the second surface. When energized, the primary winding generates magnetic flux extending in a direction parallel to the first surface and the second surface. The secondary winding receives energy transferred by the magnetic flux generated by the primary winding.

Abstract: Embodiments of the present invention provide an apparatus comprising a flexible circuit having a proximal end, a distal end, and a plurality of longitudinal conductors. Further, the apparatus includes a substantially cylindrical retractor capable of retracting the flexible circuit around an exterior surface. Further still, the apparatus includes a plurality of thermal energy transfer turrets attached to the flexible circuit near the plurality of longitudinal conductors.

Abstract: An electronic component and a circuit board having the same mounted thereon. The electronic component includes: a base part; a coil part provided on the base part and including a coil formed by disposing conductive patterns in a spiral shape and an external terminal connected to an end portion of the coil; and a cover part including an external electrode having a first surface contacting an upper surface of the external terminal and a second surface opposing the first surface and a magnetic material part provided on the coil part, made of a magnetic material, and exposing the second surface, wherein a surface area of the first surface is larger than a surface area of the second surface.

Abstract: In accordance with an embodiment, a transformer includes a first coil disposed in a first conductive layer on a first side of a first dielectric layer, and a second coil disposed in a second conductive layer on a second side of the first dielectric layer. Each coil has a first end disposed inside its respective coil and a second end disposed at an outer perimeter of its respective coil. A first crossover disposed in the second conductive layer is directly connected to the first end of the first coil and extends past the outer perimeter of the first coil. In addition, a second crossover disposed in the first conductive layer is directly connected to the first end of the second coil and extends past the outer perimeter of the second coil.

Abstract: A transformer skeleton and a winding method using the same are provided. The transformer skeleton includes at least one limiting hook. The limiting hook and a pin of the transformer skeleton are located on a same side of the transformer skeleton. A wire, which is led out from a winding groove of the transformer skeleton, electrically contacts the pin and passes through the limiting hook. The limiting hook is used to prevent the wire from moving upward. The advantage of the transformer skeleton is that the transformer skeleton disposes at least one limiting hook which is used to prevent the wire from moving upward and only a single layer of the wire contacts the pin in order to reduce the height of a tin cone. The transformer skeleton can decrease the height of the tin cone by 70%˜80%, thereby efficiently decreasing the height and width of the transformer.

Abstract: A bobbin includes a core portion extending in a z-axis direction, a flange portion at an end of the core portion on a negative direction side of the z-axis direction and extending from the core portion in an x-axis direction and a y-axis direction, and a projecting portion projecting toward the negative direction side of the z-axis direction from a surface S1 on the negative direction side of the flange portion in the z-axis direction. Pin terminals project from the surface S1 of the flange portion toward the negative direction side of the z-axis direction. A winding is wrapped around the core portion, with both ends respectively wrapped around the pin terminals. Both ends of the winding are respectively soldered to the pin terminals at a region between an end portion of the projecting portion on the negative direction side of the z-axis direction and the surface S1 of the flange portion.

Abstract: A coil component includes a coil section, an outer package, and a pair of outer electrodes. The outer package is made of magnetic material, embeds the coil section therein, and has a bottom face, a top face provided with cut-out sections, a first lateral face, and a second lateral face. Each of the pair of outer electrodes extends from both ends of the coil section, and is pulled out from the first lateral face, and then is bent toward the bottom face, and yet is bent along the bottom face and the second lateral face, and finally is bent toward the cut-out section of the top face. Recesses are formed on the bottom face at places overlapped with the pair of outer electrodes, and each of the outer electrodes is bent to form a projection protruding inside the corresponding recess.

Abstract: A magnetic device is provided. The magnetic device includes a magnetic core and a conductive winding inductively coupled to the magnetic core. The conductive winding includes a first terminal segment, a second terminal segment, and an inductive segment electrically coupled in series therebetween. The first terminal segment includes a current sensing element.

Abstract: An object of the present invention is to provide a contact coil terminal having smaller numbers of components and assembling manhours, and thus, higher productivity. For this, there is a coil terminal 153 in which a press-fitting portion is pressed into a press-fitting groove (152c) provided at a corner portion of a flange portion (152a) of a spool (152) with a coil wound therearound, and a lead-out line of the coil is entwined around a coil entwining portion (153a) projected from the flange portion (152a), and the coil entwining portion (153a) is bent and raised. Particularly, the coil entwining portion (153a) extends in an opposite direction of a press-fitting direction of the press-fitting portion so as to be able to be bent and raised, and a lead wire connecting portion (153b) extends laterally to the press-fitting direction so as to be able to be bent and raised.

Abstract: A transformer includes a magnetic core, a first coil unit and a second coil unit. The first coil unit is disposed within the magnetic core and includes a laminated board having layers laminated therein and conductive patterns. Respective ones of the conductive patterns are disposed on the laminated layers. The second coil unit includes a conductive wire spaced apart from the conductive patterns of the laminated board by an insulating distance. The conductive wire includes a triple-insulated wire surrounded by three sheets of insulating paper to maintain the insulating distance from the conductive patterns.

Abstract: A low cost, high performance electronic device for use in electronic circuits and methods. In one exemplary embodiment, the device includes an interleaved flat coil and coil winding arrangement that ensures low leakage inductance while using a combination of flat coil windings and self-bonded Litz coil windings. The flat coil windings further include features that are configured to mate with the header assembly terminal pins which substantially simplify the manufacturing process. Methods for using and manufacturing the aforementioned inductive devices are also disclosed.

Abstract: Methods for the manufacture of an electromagnetic coil assembly are provided. In one embodiment, the method includes joining a first end portion of a braided lead wire to a coiled magnet wire. A dielectric-containing material is applied in a wet-state over the coiled magnet wire and over the first end portion of the braided lead wire. The dielectric-containing material is cured to produce an electrically-insulative body in which the coiled magnet wire and the first end portion of the braided lead wire are at least partially embedded. Prior to application of the dielectric-containing material, the braided lead wire is at least partially impregnated with a masking material deterring wicking of the dielectric-containing material into an intermediate portion of the braided lead wire. In certain cases, the masking material may be removed from the braided lead wire after curing, and the electrically-insulative body may be sealed within a canister.

Abstract: A chip electronic component may include an insulating layer formed on a lower portion of a side surface of an internal coil pattern to avoid a direct contact between the internal coil pattern and a magnetic material, thereby preventing a waveform distortion indicating a reduction in inductance at high frequency.

Abstract: A coil component may be capable of being easily manufactured and significantly decreasing direct current (DC) resistance of its wiring. The coil component may include a coil assembly including a core substrate and coil patterns formed on the core substrate; and a magnetic material part embedding the coil assembly therein.

Abstract: A coil component containing a drum core having a winding column, and an upper flange and a lower flange at both ends of the winding column, and a conductive wire wound around the winding column, a ring-type core having a through-hole accommodate the drum core in the through-hole, a pair of metal terminals arranged at outer side surfaces of the ring-type core; wherein each of the metal terminals includes: a side surface portion arranged to face the side surfaces of the ring-type core; a top surface portion bent away from the side surface to the top surface of the core; and a bottom surface portion bent away from the side surface portion to bottom surface of the core; the top surface portion has a pair of claws extending toward the center of the through-hole, the claws being bent toward the inside surface of the through-hole.

Abstract: There is provided a coil component capable of easily securing insulation between external connection terminals and a core at the time of being manufactured at a small size. To this end, the coil component includes: a bobbin including a winding part having a coil wound therein and a terminal coupling part having at least one external connection terminal coupled thereto, the at least one external connection terminal having a lead wire of the coil connected thereto; and a core coupled to the bobbin and electromagnetically coupled to the coil, wherein the bobbin includes at least one spacing block protruding between the external connection terminal and the core and extending a creepage distance between the external connection terminal and the core.

Abstract: There are provided a coil component having external connecting terminals firmly coupled to a bobbin thereof, and a method of manufacturing the same. The coil component includes: a bobbin having a coil wound therein; and at least one external connecting terminal coupled to the bobbin so that one end thereof protrudes outwardly, wherein the external connecting terminal includes a terminal pin inserted into the bobbin and an extension part enlarges a cross-sectional area of the terminal pin in the bobbin.

Abstract: Disclosed are a coil component capable of securing insulation between primary and secondary coils while being miniaturized, a mounting structure thereof, and an electronic device having the same. The coil component includes a bobbin including a winding part around which coils are wound and first terminal fastening parts fastened to a plurality of first connection terminals; and a second terminal fastening part including terminal blocks protruded from the bobbin and a plurality of second connection terminals fastened to the terminal blocks, wherein the second terminal fastening part is mounted on a substrate while being spaced apart from the bobbin after the coils are wound therearound.

Abstract: An induction coil of a touch input device provided in the present invention includes a ribbon cable and a coupling device. The ribbon cable is disposed on a plane, and the ribbon cable has a first terminal and a second terminal and has a plurality of wires. The ribbon cable defines a sensing region on the plane by a plurality of bends. The coupling device is utilized to couple the wires at the first terminal and the second terminal such that the wires form a circuit with a plurality of turns wound by a single conducting wire. A touch input device is further provided in the present invention.

Abstract: A multi-phase coupled inductor includes a magnetic core formed of a powder magnetic material and first, second, third, and fourth terminals. The coupled inductor further includes a first winding forming at least one turn and at least partially embedded in the core and a second winding forming at least one turn and at least partially embedded in the core. The first winding is electrically coupled between the first and second terminals, and the second winding electrically is coupled between the third and fourth terminals. The second winding is at least partially physically separated from the first winding within the magnetic core. The multi-phase coupled inductor is, for example, used in a power supply.

Abstract: An inductor device has a plurality of inductor windings arranged on a common magnetic core and electrically connected, parallel to one another, to a common connection at one end of the inductor windings. The inductor windings are implemented by a one-part coil form arranged on the common magnetic core and comprising the common connection of the inductor windings. The inductor windings are wound around their common connection and the common magnetic core.

Abstract: The present invention provides a transformer including a coiling frame, an iron core, and a fastener. There is a wire twining round the coiling frame, which has a through hole inside thereof. The iron core extends through the through hole and forms a magnet loop. The fastener comprises a first component and a second component. The first component connects with the second component in a horizontal direction thereby surrounding and fixing the coiling frame and the iron core. One advantage of the present invention is that the fastener fixing the coiling frame and the iron core has a split structure. The fastener is assembled with the coiling frame directly, and a combination of the coiling frame and the iron core need not be vertically assembled with the fastener so as to make the transformer assembling easier and avoid the size of the transformer troublesome.

Abstract: The present invention relates to a planar transformer, the transformer including a core provided to induce formation of a magnetic field, a bobbin coupled to a core, at least one primary winding interposed between the core and the bobbin to supply a power signal, a first insulation unit provided to the at least one primary winding to insulate the at least one primary winding, at least one secondary winding provided to the first insulation unit and insulated by the first insulation unit to transform the power signal, and a second insulation unit provided to the at least one secondary winding to insulate the at least one secondary winding.