TW202309944A - Dual inductor assembly - Google Patents

Abstract

A dual inductor assembly is provided that includes a holder in which first and second inductors have been inserted in order to provide a compact package as a single unit. The holder is designed to provide secure engagement of the inductors to improve shock and vibration performance. The configuration of the dual inductor assembly further allows for easier inspection of solder joints due to the housing configuration as well as the location of the leads on the inductor body.

Description

Dual Inductor Assemblies

The present application relates to the field of electronic components, in particular electromagnetic devices such as inductors, and more particularly dual inductors arranged in a single package, for example for use in audio amplifiers.

Electromagnetic devices such as inductors are generally passive two-terminal electronic components. An inductor generally consists of a conductor, such as a lead wire wound into a coil. When current flows through the coil, energy is temporarily stored in the coil's magnetic field. When the current flowing through the inductor changes, the time-varying magnetic field induces a voltage in the conductor according to Faraday's law of electromagnetic induction.

Some known inductors have a core body of magnetic material with a conductor positioned inside it. The conductor may be formed by wound coils. Examples of known inductors include US Patent Nos. 6,198,375 (Inductor Coil Structures) and 6,204,744 (High Current, Low Profile Inductors), the entire contents of which are incorporated herein by reference. Alternatively, the conductor may be a strip or strip of conductive material in a meander or other shape.

An existing high current dual inductor is available from the applicant with the part number IHLD-3232HB-5A. Its configuration consists of two inductors arranged in an injection molded holder to form one package with a shielded configuration, especially for audio amplifiers. Its configuration has proven successful in a variety of applications. However, press fitting the inductor into the holder requires a precise fit in the holder pocket and also causes residual stress on the holder.

Another problem in the related industry concerns the inspection of wire areas for solder connections.

It would be desirable to provide an improved dual inductor that is easier to assemble, potentially improves performance, and is easier to inspect when incorporated into a circuit assembly on a printed circuit board.

Provided herein is a dual inductor assembly comprising two or more inductors that provides easier assembly, as well as improved shock and vibration performance. Furthermore, the configuration of the dual inductor assembly allows for easier inspection of soldering due to the housing configuration and the location of the wires on the inductor body.

In one configuration, the dual inductor assembly comprises a holder comprising a top, first and second opposing sidewalls having respective first ends connected to the top, having respective first ends connected to the top and connecting The first and second opposing partial sidewalls to the respective first sides of the respective sides of the first opposing sidewalls, and the respective first ends having the respective first ends connected to the top and the respective sides connected to the second opposing sidewalls Third and fourth opposing portions of one side wall. The first and third section sidewalls are aligned in a first plane and the second and fourth section sidewalls are aligned in a second plane. This configuration forms at least one pocket. Preferably, the central dividing wall is provided with a first end connected to the top and first and second sides respectively connected to first and second opposing side walls to form first and second pockets.

The inner surfaces of the first and second opposing side walls, the first, second, third and fourth portion side walls, and the central divider facing inwardly to define the first and second pockets may include spacer projections which Adapted to more closely match the sidewalls of the inductor to provide a tighter fit. The spacer boss is preferably integrally formed with the retainer.

To retain the inductor in the holder, inwardly directed raised portions are located adjacent respective second ends of the first and second opposing portion sidewalls and the third and fourth opposing portion sidewalls.

First, second, third and fourth openings are defined in the first, second, third and fourth portion sidewalls, respectively. The first, second, third and fourth openings extend from a portion directly above each of the raised portions toward the top. Such openings facilitate molding of the raised portion and provide enhanced flexibility for the first, second, third and fourth portion sidewalls for insertion of the inductor.

The first and second inductors are inserted into respective first and second pockets in a sliding fit, as defined hereinafter, which will not spring outwardly during insertion of the first and second inductors into the first and second pockets The prominence of bias is taken into consideration. The first inductor comprises, on the side facing the side walls of the first and third portions, corresponding recesses into which engage the inwardly directed protrusions on these portion side walls, and the second inductor, on the side facing The side walls of the second and fourth sections include corresponding recesses on one side of which engage inwardly directed protrusions on the side walls of the sections for maintaining the first and second inductors in the respective first and second inductors. One and two bags in the department. It is also possible to use an adhesive to secure the inductor in place.

In one configuration, the first inductor comprises wires extending from the bottom to the side facing the side walls of the first and third portions. In a plan view looking down at the top of the holder, such wires are at least partially visible in the first space between the first and third part side walls. Furthermore, the second inductor comprises wires extending from the bottom to the side facing the side walls of the second and fourth parts, wherein in a plan view looking down on the top of the holder, these wires are at least partially visible in the second and the second space between the side walls of the fourth part. Preferably, the inductor body has no notches for the wires, and in a plan view looking down at the top of the holder, at least 50% of the portions where the wires extend on respective sides of the first and second inductors are free. is blocked to allow easier visual inspection of the soldering when the dual inductor is mounted on the PCB.

Preferably, the first and second inductors have the same physical size and the same inductance value. However, the first and second inductors may be different. For example, the first and second inductors may have the same physical dimensions but different inductances, or may have different physical dimensions.

In one embodiment, the protrusion comprises a taper on a side facing the second ends of the first, second, third and fourth partial side walls. This facilitates the assembly of the inductor in the pocket.

In one embodiment, the first and second opposing side walls include a second end opposite the first end, and the first, second, third, and fourth partial side walls include a second end opposite the first end. portion, and the second ends of the first and second opposing side walls are at the same level as the second ends of the first, second, third and fourth partial side walls. Preferably, the level defines a pocket depth exceeding 55% of the height of the first and second inductors.

In one embodiment, the retainer is an injection molded polymer part, and is preferably made of a polymer material, such as a liquid crystal polymer. Alternatively, the retainer may be made from any other suitable material.

In one embodiment, the first, second, third and fourth openings extend to the bottom surface of the top. Such openings allow the insertion of parts of the molding tool to form the protrusions during injection molding of the holder.

Preferably, corresponding notches on respective sides of the first and second inductors are located in the middle. Such notches may be formed such that they are shallower than the protrusions so that the holder exerts some spring pressure via the protrusions on the inductor body to maintain its seated position.

Preferably, the inductor is of known type and comprises a conductive element molded into the body. The conductive element has a specific shape, which may be, for example, a meander or meander shape, and may be formed with an "S" shape or another shape with bends or curved regions, such as a circular shape, an ellipsoidal shape, or an Omega (Ω )shape. Alternatively, the inductor may be a winding. The body of the inductor surrounds the conductive element and can be pressed around the conductive element, leaving exposed terminal wires extending from the surface of the body. The conductive elements are internally connected to terminal wires on each end.

The body may be formed from a magnetic material comprising magnetic particles molded around a central portion of the conductive element and portions of the first and second terminal wires. The magnetic particles may be powdered or granular magnetic material, or more particularly powdered iron particles.

Certain terms are used in the following description for convenience and limitation only. The words "right", "left", "upper" and "lower" indicate directions in the drawings to which reference is made. As used in the claims and corresponding parts of the specification, the words "a" and "an" are defined to include one or more of the referenced item unless specifically stated otherwise. Terminology includes the words specifically mentioned above, derivatives thereof and words of similar import. The phrase "at least one" followed by a list of two or more items (eg, A, B, or C) means that it refers to any individual one of A, B, or C, as well as any combination thereof. It may be noted that some figures are shown in partial transparency for purposes of illustration, illustration, and demonstration only, and are not intended to imply that the elements themselves will be transparent in their final manufactured form.

For the purposes of this application, the term "double" in relation to a dual inductor assembly means "two or more," and a dual inductor assembly may thus include two or more inductors. The term "inductor" can generally be interpreted as any electromagnetic, two-terminal circuit member. Slip fit means a fit within a tolerance of 0.002 to 0.020 inches (approximately 0.050 to 0.5 mm), not taking into account the elastic action of the protrusion of the retainer engaging the notch in the inductor body during installation. Unless otherwise stated, the term generally or generally means within +/- 10% of a specified value and within +/- 5 degrees of a specified angle or direction. The term "same" with respect to the inductance value of an inductor means within industry normal tolerances.

Referring to Figures 1-8, an embodiment of a dual inductor assembly 10 is shown. The dual inductor assembly 10 includes a holder 20 into which a first inductor 110 and a second inductor 112 have been inserted to provide a small package as a single unit. Although first and second inductors are shown, it is contemplated that there may be three or more inductors and are thus encompassed within the meaning of "dual inductor assembly". FIGS. 9-14 show detail views of the holder 20 alone, and FIGS. 15-17 show views of the single inductors 110 , 112 before being assembled into the dual inductor assembly 10 . In the depicted embodiment, the inductors 110, 112 are identical in size and function. However, different dimensions and/or characteristics are allowed within the scope of the present description. For example, the first and second inductors 110, 112 have the same physical size but different inductances.

As shown in FIGS. 1 to 5 , 9 and 12 , the holder 20 includes a top 22 . The top 22 has an upper surface 22a and a lower surface 22b. The opposing first and second side walls 24 , 26 have respective first ends 24 a , 26 a connected to the top 22 . The first side wall 24 further includes a second end portion 24b opposite to the first end portion 24a, and first and second sides 24c, 24d. This also includes inner side surface 24e and outer side surface 24f. The second side wall similarly includes a second end 26b, first and second sides 26c, 26d, and an inner side surface 26e and an outer side surface 26f.

1, 4A, 4B, 5 and 9 to 11, first and second opposing partial sidewalls 30, 32 are provided with respective first ends 30a, 32a connected to the top 22, and connected to the first opposing Respective first sides 30c, 32c of respective first and second sides 24c, 24d of sidewall 24 . Third and fourth opposing partial sidewalls 34, 36 are also provided having respective first ends 34a, 36a connected to the top 22, and respective first and second sides 26c, 36a connected to the second opposing sidewall 26. The corresponding first side 34c, 36c of 26d. Each of the partial sidewalls 30, 32, 34, 36 includes a second end 30b, 32b, 34b, 36b, respectively, a second side 30d, 32d, 34d, 36d, an inner side surface 30e, 32e, 34e, 36e, and Outer side surfaces 30f, 32f, 34f, 36f. This configuration defines at least one pocket capable of receiving the first and second inductors 110 , 112 .

Preferably, as shown in detail in FIGS. 5 , 6 , 8 , 9 to 11 , 13 and 14 , the central dividing wall 40 is provided comprising a first end 40 a connected to the top 22 and connected to the first and second ends respectively. First and second sides 40c, 40d of the two opposite side walls 24, 26. This structure forms first and second pockets 42 , 44 in the holder 20 as shown in detail in FIGS. 9 , 10 , 13 and 14 . The central dividing wall 40 is best shown in Figures 8, 10 and 13 further comprising a second end portion 40b, and first and second surfaces 40e, 40f.

Referring to Figures 5, 6 and 14, the inwardly directed raised portions 30g, 32g, 4g, 36g are located on the first and second opposite part sidewalls 30, 32 and the third and fourth opposite part sidewalls 34, 36. Near the second ends 30b, 32b, 34b, 36b. The raised portions 30g, 32g, 34g, 36g preferably comprise tapered portions 30h, 32h, 34h, 36h towards the second ends 30b, 32b, 34b, 36b of the partial side walls 30, 32, 34, 36. Figure 14 shows a detail view of raised portion 34b, and the other raised portions, 30g, 32g and 36g, are shown as mirror images of raised portion 34g.

In addition, as shown in detail in FIGS. 1, 4A, 4B, 5, 9 to 11 and 14, first, second, third and fourth openings 30j, 32j, 34j, 36j are respectively defined in the first, second, In the third and fourth part side walls 30 , 32 , 34 , 36 . The openings 30j , 32j , 34j , 36j extend toward the top 22 from a position directly above each of the raised portions 30g , 32g , 34g , 36g . Such openings 30j, 32j, 34j, 36j serve two functions. First, in order to allow molding of the bosses 30g, 32g, 34g, 36g, the pins, which are injection molded parts, extend into the area of the openings 30j, 32j, 34j, 36j and into the first and second pockets 42 , In the area of 44, in which the pocket portion is contacted to form a molded part. Once the material forming the retainer 20 has been ejected, the pins are withdrawn out of the openings 30j, 32j, 34j, 36j. This allows the bosses 30g, 32g, 34g, 36g to be formed to extend into the pockets 42, 44 without trapping the retainer 20 on the tool. The second function of the openings 30j, 32j, 34j, 36j imparts additional flexibility to the first, second, third and fourth partial sidewalls 30, 32, 34, 36. This allows portions of the sidewalls 30, 32, 34, 36 to resiliently deflect outward when the first and second inductors 110, 112 are inserted, as described in more detail below. Further, such openings 30j , 32j , 34j , 36j preferably extend to the bottom surface 22b of the top 22 .

Retainer 20 is preferably an injection molded polymer part, and is more preferably formed from a liquid crystal polymer that can withstand high temperatures (eg, up to 155 degrees C).

As shown in Figures 9, 10, 13 and 14, the inner surfaces 24e, 26e of the first and second opposing side walls 24, 26, the first, second, third and fourth partial side walls 30, 32, 34, 36 The inner surfaces 30e, 32e, 34e, 36e, and the first and second surfaces 40e, 40f of the central divider wall 40 may include spacer protrusions 24x, 26x, 40x adapted to more closely match the inductor Dimensions 110, 112 to provide a snug fit, as described in more detail below.

Preferably, the second ends 24b, 26b of the side walls 24, 26 and the second ends 30b, 32b, 34b, 36b of the first, second, third and fourth partial side walls 30, 32, 34, 36 are all are on the same level, as indicated by L in FIG. 7 . These ends further include tapers as shown in FIGS. 10 , 13 and 14 to facilitate insertion of the first and second inductors 110 , 112 .

Referring to Figures 1, 4A, 4B, 5 to 8 and 15 to 17, the first and second inductors 110, 112 are inserted into respective first and second pockets 42, 44 in a sliding fit. This snug fit signifies the final mounting location of the inductor 110 , 112 in the respective first and second pockets 42 , 44 . Inductors 110, 112 each include a body 110a, 112a, and a conductive element 110b, 112b within the body 110a, 112a (see FIG. 8). Both the first and second inductors 110, 112 include corresponding notches 110d, 112d on the first side 110e facing the first and third partial side walls 30, 34 for the first inductor 110 and On the first side 112e facing the second and fourth partial side walls 32 , 36 for the second inductor 112 . Thus, in the mounted position, the inwardly directed protrusions 30g, 34g of the first and third part side walls 30, 34 engage in corresponding recesses 110d of the first side 110e of the first inductor 110, The protrusions 32 g , 36 g of the second and fourth partial sidewalls 32 , 36 engage in the recesses 112 d of the first side 112 e of the second inductor 112 . This engagement maintains the first and second inductors 110 , 112 in their respective first and second pockets 42 , 44 . It is also possible to apply an adhesive to one or more of the interfacing surfaces between the first and second inductors 110, 112 and the holder 20 to hold the inductors 110, 112 more firmly in place.

As shown in FIGS. 15 to 17, each of the inductors 110, 112 includes a wire 110c, 112c extending from a respective bottom 110h, 112h to a respective first side 110e, 112e, respectively facing First and third portion of sidewalls 30 , 34 for an inductor 110 and second and fourth portion of sidewalls 32 , 36 for a second inductor 112 . The inductors 110 , 112 further include a second side 110 f , 112 f facing the central partition wall 40 , and a top portion 110 g , 112 g inserted into the pocket portion 42 , 44 first.

The inductor bodies 110a, 112a are preferably formed from a magnetic material that is molded around the conductive elements 110b, 112b. In one embodiment, the inductor bodies 110a, 112a may be formed of ferrous materials. In one embodiment, the inductor bodies 110a, 112a may comprise, for example, iron, metal alloys, ferrite, combinations of the foregoing, or other materials known in the inductor art and used to form such bodies. In one embodiment, the inductor bodies 110a, 112a may be formed from magnetic particles such as powdered or granular magnetic particles. In one embodiment, the magnetic particles may be powdered iron particles. In a non-limiting example, magnetic materials can be used for the inductor body, including powdered iron particles, fillers, resins, and lubricants, such as those described in U.S. Patent Nos. 6,198,375 (inductor coil construction) and 6,204,744 (high current, low Profile Inductor), both of which are incorporated herein by reference as if fully mentioned.

Non-limiting examples of package shapes for the inductor bodies 110a, 112a include box shapes, cuboid shapes, rectangular prisms, or any of the foregoing including rounded corners (see FIGS. 15-17 ), one or more irregular surfaces, etc. one. Those skilled in the art will recognize that other inductor shapes can be used without departing from the spirit of the invention.

Acceptable metals for forming the conductive elements 110b, 112b may be copper, aluminum, platinum, or other metals as known in the art for use as inductor coils. In an exemplary embodiment, a conductive element may be fabricated into a preform by bending a conductive material into a selected shape. Non-limiting examples of leads that may be used to form the conductive elements 110b, 112b include flat leads, square leads, or rectangular shaped leads, round leads. Those skilled in the art will recognize that other lead shapes may be used within the scope of the present invention. The length, width and height of the conductive elements 110b, 112b and inductor bodies 110a, 112a may vary based on the inductor application. Furthermore, the characteristics of the conductive elements 110b, 112b can be varied to provide different inductances to the first and second inductors 110, 112 having the bodies 110a, 112a (having the same physical dimensions). The dimensions of the conductive elements 110b, 112b can be designed to increase the ratio of the space used versus the space available in the inductor body 110a, 112a.

The first space 33 is located between the first and third part side walls 30, 34, and in a plan view looking down on the top 22 of the holder 20, the terminal lead 110c of the first inductor 110 is at least partially visible in the first Space 33, as shown in FIG. 3 . Similarly, a second space 35 is located between the second and fourth part side walls 32, 36, and in a plan view looking down at the top 22 of the holder 20, the second terminal lead 112c is at least partially visible in the second space 35, also shown in Figure 3. Here, at least partially visible means that in a plan view looking down at the top 22 of the holder 20 at least 50% of the terminal wires 110c, 112c are visible. This allows for easier inspection once the dual inductor assembly 10 is mounted on a PCB or other electronic component to determine if a solder has been formed.

In a preferred embodiment, the first and second inductors 110, 112 have the same physical size and the same inductance value. However, this can vary depending on the particular application.

Referring to FIG. 7, the level L defined by the sidewalls and the second ends 24b, 26b, 30b, 32b, 34b, and 36b of portions of the sidewalls defines a pocket depth _HP beyond the first and second inductors 110, 112 55% of the height H. Furthermore, referring to Figures 13, 16 and 17, the finished inductor in one embodiment has a width W of about 7 mm and a depth D of about 2.3 mm (see Figures 16 and 17). Not taking into account the area occupied by the protrusions 30g, 34g, 36g, the insertion area of each pocket has a containment width P and a containment thickness D _P of approximately 7.1 mm and 2.4 mm (indicated in FIG. 13 ), respectively. . The raised portions 30g, 32g, 34g, 36g have a height on the inner surface of the respective first, second, third and fourth section side walls 30, 32, 34, 36 of at least about 0.3 mm. The depth of the corresponding notches 110d, 112d in the first and second inductors 110, 112 is also about 0.3 mm. However, such dimensions may vary based on a particular assembly. Further, it is also possible to provide a slight tightness of approximately 0.05 to 0.2 mm between the protrusions 30g, 32g, 34g, 36g and the corresponding notches 110d, 112d.

In a preferred configuration, the corresponding notches 110d, 112d are located midway on the respective sides 110e, 112e of the first and second inductors 110, 112. However, the location may vary for a particular application and holder 20 configuration.

It will be understood that the foregoing has been presented by way of illustration only and not as limitation of any kind. It is contemplated that various substitutions and modifications can be made to the described embodiments without departing from the spirit and scope of the invention. Having thus described the invention in detail, it will be understood and will be apparent to those skilled in the art that many substantial changes may be made without altering the concepts and principles of the invention embodied herein, only a few of which are described herein. Examples are given in the detailed description. It will also be appreciated that many embodiments are possible which incorporate only a portion of the preferred embodiment for which those portions do not alter those portions of the inventive concepts and principles embodied herein. Therefore, the present embodiments and selected configurations are considered to be exemplary and/or illustrative and not restrictive in all respects, wherein the scope of the present invention is indicated by the appended claims rather than by the foregoing description of the invention, and All alternative embodiments and changes to the present embodiments that fall within the equivalent meaning and range of these claims are therefore intended to be encompassed herein.

10: Dual Inductor Assembly 20: Holder 22: Top 22a: Upper Surface 22b: Lower Surface 24: First Opposite Sidewall 24a: First End 24b: Second End 24c: First Side 24d: Second Side Side 24e: inner surface/inner surface 24f: outer surface 24x: spacer boss 26: second opposite side wall 26a: first end 26b: second end 26c: first side 26d: second side 26e : inner side surface/inner surface 26f: outer side surface 26x: spacer protrusion 30: first part side wall 30a: first end 30b: second end 30c: first side 30d: second side 30e: inner side surface /Inner surface 30f: outer surface 30g: raised portion 30h: tapered portion 30j: first opening 32: second portion side wall 32a: first end portion 32b: second end portion 32c: first side edge 32d: second Side 32e: inner surface/inner surface 32f: outer surface 32g: raised portion 32h: tapered portion 32j: second opening 33: first space 34: third portion side wall 34a: first end portion 34b: second end Portion 34c: first side 34d: second side 34e: inner surface/inner surface 34f: outer surface 34g: raised portion 34h: tapered portion 34j: third opening 35: second space 36: fourth part side wall 36a: first end 36b: second end 36c: first side 36d: second side 36e: inner surface/inner surface 36f: outer surface 36g: raised portion 36h: tapered portion 36j: fourth opening 40: central partition wall 40a: first end 40b: second end 40e: first surface 40f: second surface 40x: spacer boss 42: first pocket 44: second pocket 110: first Inductor 110a: (inductor) body 110b: conducting element 110c: wire 110d: notch 110e: first side 110f: second side 110g: top 110h: bottom 112: second inductor 112a: (inductor) body 112b : conductive element 112c: wire 112d: notch 112e: first side 112f: second side 112g: top 112h: bottom D: depth D _P : storage thickness H: height H _P : pocket depth L: horizontal P: storage width W: width

The foregoing aspects and many of the attendant advantages of the present invention will become more comprehensible when reference is made to the following detailed description when taken in conjunction with the accompanying drawings in which:

[ FIG. 1 ] is a perspective view of a dual inductor component according to an embodiment of the present description.

[ FIG. 2A ] is a right side view of the dual inductor component shown in FIG. 1 .

[ FIG. 2B ] is a left side view of the dual inductor component shown in FIG. 1 .

[ Fig. 3 ] is a top view of the dual inductor unit shown in Fig. 1 .

[ FIG. 4A ] is a front view of the dual inductor assembly shown in FIG. 1 .

[ FIG. 4B ] is a rear view of the dual inductor assembly shown in FIG. 1 .

[ Fig. 5 ] is a perspective view of a partial cross section of the dual inductor assembly shown in Fig. 1 .

[ Fig. 6 ] is a cross-sectional view of the dual inductor assembly shown in Fig. 1 .

[ Fig. 7 ] is a front view of the dual inductor component shown in Fig. 1 with the holder shown in a partially transparent manner.

[ Fig. 8 ] is a bottom view of the dual inductor unit shown in Fig. 1 .

[FIG. 9] It is a three-dimensional elevation, front and right side view showing the holder used in the embodiment of the dual inductor component.

[Fig. 10] is a three-dimensional top, rear and left side view showing the holder of Fig. 9.

[ Fig. 11 ] is a front view of the holder shown in Fig. 9 .

[ Fig. 12 ] is a top plan view of the holder shown in Fig. 9 .

[ Fig. 13 ] is a plan bottom view of the holder shown in Fig. 9 .

[ FIG. 14 ] is a partial perspective view looking up from the bottom of a portion of one of the pockets defined by the holder shown in FIG. 9 .

[ Fig. 15 ] is a perspective view of an embodiment of an inductor used in a dual inductor assembly.

[ Fig. 16 ] is a front view of the inductor shown in Fig. 15 .

[ Fig. 17 ] is a side view of the inductor shown in Fig. 15 .

10: Dual inductor assembly

20: Holder

22: top

22a: upper surface

24: First opposite side wall

24a: first end

24b: second end

24c: First side

24d: second side

26: second opposite side wall

30: The first part of the side wall

30a: first end

30b: second end

30c: first side

30j: first opening

32: Second part side wall

32a: first end

34: The third part of the side wall

34a: first end

34b: second end

34c: first side

34j: third opening

36: Part 4 side walls

110: first inductor

112: second inductor

Claims (13)

A dual inductor assembly comprising: A holder comprising a top, first and second opposite side walls, first and second relative portion side walls, and third and fourth relative portion side walls, the first and the first Two opposing side walls have respective first ends connected to the top, the first opposing portion of the side wall and the second opposing portion of the side wall have respective first ends connected to the top and respective sides connected to the first opposing side wall Respective first sides of the sides, the third opposing portion of the side wall and the fourth opposing portion of the side wall have respective first ends connected to the top and respective first sides connected to the respective sides of the second opposing side walls , the first portion sidewall and the third portion sidewall are aligned in a first plane and the second portion sidewall and the fourth portion sidewall are aligned in a second plane to define at least one pocket; inwardly directed raised portions adjacent respective second ends of the first and second opposing portion sidewalls and the third and fourth opposing portion sidewalls; A first opening, a second opening, a third opening, and a fourth opening are respectively defined in the first portion of the side wall, the second portion of the side wall, the third portion of the side wall, and the fourth portion of the side wall, the first opening, the the second opening, the third opening, and the fourth opening extend toward the top from a location directly above each of the raised portions; and A first inductor and a second inductor, which are inserted into the at least one pocket, the first inductor comprises on a side facing the side wall of the first part and the side wall of the third part for engaging the inwardly directed a corresponding notch for the raised portion, and the second inductor comprises a corresponding notch for engaging the inwardly directed raised portion on a side facing the side wall of the second portion and the side wall of the fourth portion , for maintaining the first inductor and the second inductor in respective first and second pockets. The dual inductor assembly as claimed in claim 1, further comprising a central partition wall having a first end connected to the top and a first end connected to the first opposite side wall and the second opposite side wall, respectively. one side and a second side such that the at least one pocket comprises a first pocket and a second pocket, and the first inductor and the second inductor are inserted into the corresponding first pocket in a sliding fit portion and the second bag portion. The dual inductor assembly of claim 1, wherein the first inductor comprises wires extending from a bottom to the side facing the sidewall of the first portion and the sidewall of the third portion, wherein the top portion of the holder is viewed downwardly In plan view, the wire is at least partly visible in a first space between the first part sidewall and the third part sidewall, and the second inductor comprises extending from the bottom to face the second part sidewall and The wire on the side of the fourth portion side wall, wherein in a plan view looking down on the top of the holder, the wire is at least partially visible in a second space between the second portion side wall and the fourth portion side wall middle. The dual inductor assembly as claimed in claim 1, wherein the first inductor and the second inductor have the same inductance value. The dual inductor assembly of claim 1, wherein the first inductor and the second inductor have the same physical size but different inductances. The dual inductor assembly as claimed in claim 1, wherein the protrusion is at one of the second ends facing the first part sidewall, the second part sidewall, the third part sidewall and the fourth part sidewall Tapers are included on the sides. The dual inductor assembly of claim 1, wherein the first opposing sidewall and the second opposing sidewall include a second end relative to the first end, the first portion of the sidewall, the second portion of the sidewall, the The third portion of the side wall and the fourth portion of the side wall include a second end opposite to the first end, and the second end of the first opposing side wall and the second opposing side wall is connected to the first portion of the side wall, the first end The second end portions of the second part of the sidewall, the third part of the sidewall and the fourth part of the sidewall are at the same level. The dual inductor assembly of claim 7, wherein the level defines a pocket depth that exceeds 55% of the height of the first and second inductors. The dual inductor assembly of claim 1, wherein the retainer is an injection molded polymer part. The dual inductor assembly of claim 1, wherein the first opening, the second opening, the third opening and the fourth opening extend to a bottom surface of the top. The dual inductor assembly as recited in claim 1, wherein the corresponding notch is located at a middle portion on respective sides of the first inductor and the second inductor. The dual inductor assembly as claimed in claim 1, further comprising an adhesive to hold the first inductor and the second inductor in the holder. The dual inductor assembly of claim 1, further comprising an additional inductor located in the at least one pocket.

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