Power conversion module

Abstract

An electric energy conversion module includes a circuit board and a transformer. The transformer is arranged on the circuit board and includes a primary winding, a plurality of secondary windings and a magnetic core seat. The secondary winding includes a plurality of conductive sheets, each of which includes a main body, two pins and two intermediate sections. The pins extend along a first direction and are connected to the main body through the intermediate sections extending along a second direction; the transformer forms an electrical connection with the circuit board through the pins; wherein the main body has a slot, and the intermediate sections are located on both sides of the slot. The magnetic core seat includes a central column, and the coil portion of the primary winding and the main body of the conductive sheet are alternately arranged around the central column, and the pins of the conductive sheet are allocated on opposite sides of the central column.

Description

Technical Field

[0001] The present application relates to a power conversion module, and more particularly to a power conversion module used in high power and medium to high wattage power supplies. Background Art

[0002] Magnetic components are the core of power supply design. In the design of AC / DC power supplies, while meeting the requirements of high wattage and high efficiency, space utilization, material selection and design cost must also be taken into account, which is a big challenge for R&D personnel. Summary of the invention

[0003] The present application provides an electric energy conversion module which can effectively reduce leakage inductance and has a small volume.

[0004] The present application provides a power conversion module, including a circuit board and a transformer. The circuit board is arranged with at least one conductive pattern, and the transformer is arranged on the circuit board and electrically connected with the conductive pattern. The transformer includes a primary winding, a secondary winding and a magnetic core seat; the primary winding includes at least one coil portion, the secondary winding includes a plurality of conductive sheets, and the magnetic core seat includes a magnetic column. Each conductive sheet of the secondary winding includes a single-layer body, two pins and two intermediate sections; the single-layer body has a slot, the pins extend along a first direction, and the transformer is combined on the circuit board through the pins. The intermediate section extends along a second direction, and the single-layer body is connected to the pins through the intermediate section; wherein the intermediate section is located on both sides of the slot, and the second direction is perpendicular to the first direction. The coil portion and the single-layer body of the conductive sheet are staggered, the magnetic column of the magnetic core seat passes through the center of the coil portion and the single-layer body of the conductive sheet, and the pins of the conductive sheet are arranged on the opposite sides of the magnetic column.

[0005] In the transformer of the power conversion module provided by the present application, the coil portion of the primary winding and the plurality of conductive sheets of the secondary winding are staggered to achieve the effect of reducing the leakage inductance value. Secondly, the conductive sheet pins of the secondary winding are allocated on two opposite sides of the center column of the magnetic core seat, and the secondary winding in the transformer is connected to the circuit board through the pins to achieve series connection or parallel connection, which can realize a small-volume transformer and increase the flexibility in application. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a circuit block diagram illustrating an electric energy conversion system according to an embodiment of the present application.

[0007] Figure 2 This is a partial exploded view illustrating an electric energy conversion module according to an embodiment of the present application.

[0008] Figure 3 It is a partial assembly diagram illustrating an electric energy conversion module according to an embodiment of the present application.

[0009] Figure 4 This is a combination diagram illustrating an electric energy conversion module according to an embodiment of the present application.

[0010] Figure 5 is a cross-sectional view, illustrating the Figure 4 The power conversion module of line AA.

[0011] Figure 6 This is an exploded view illustrating a winding combination according to an embodiment of the present application.

[0012] Figure 7 It is a front view illustrating a winding combination according to an embodiment of the present application.

[0013] Figure 8 It is a side view illustrating a winding combination according to an embodiment of the present application.

[0014] Fig. 9 It is a side view illustrating a winding combination according to an embodiment of the present application.

[0015] Fig.10 It is a top view illustrating a conductive sheet according to an embodiment of the present application.

[0016] Fig.11 It is a top view illustrating a conductive sheet according to an embodiment of the present application.

[0017] Fig. 12A This is a bottom view illustrating a circuit board according to an embodiment of the present application.

[0018] Fig. 12B This is a bottom view illustrating a circuit board according to an embodiment of the present application.

[0019] Fig.13 It is a three-dimensional diagram illustrating a primary winding and a secondary winding according to an embodiment of the present application.

[0020] Fig.14 This is a bottom view illustrating a primary winding and a secondary winding according to an embodiment of the present application.

[0021] Fig.15 The exploded view illustrates the primary winding and the secondary winding of an embodiment of the present application. DETAILED DESCRIPTION

[0022] The present disclosure provides several different implementation methods or embodiments that can be used to implement different features of the present invention. For the sake of simplicity of description, the present disclosure also describes examples of specific components and arrangements. Please note that the purpose of providing these specific examples is only for demonstration and not for any limitation. For example, in the following description of how a first feature is on or above a second feature, some embodiments may be included in which the first feature and the second feature are in direct contact, and other different embodiments may be included in the description in which there are other features between the first feature and the second feature, so that the first feature and the second feature are not in direct contact. In addition, the various examples in the present disclosure may use repeated reference numbers and / or text notes to make the document simpler and clearer, and these repeated reference numbers and notes do not represent the association between different embodiments and / or configurations. Furthermore, it should be understood that when an element is said to be "connected to" or "coupled to" another element, it can be directly connected or coupled to another element, or there may be other intermediate elements.

[0023] In addition, when the present disclosure uses spatially relative descriptive terms such as "under", "low", "down", "above", "on", "down", "top", "bottom" and similar terms, for ease of description, their usage is to describe the relative relationship of one element or feature to another (or multiple) elements or features in the diagram. In addition to the angular orientation shown in the diagram, these spatially relative terms are also used to describe the possible angles and orientations of the device during use and operation. The angular orientation of the device may be different (rotated 90 degrees or other orientations), and these spatially relative descriptions used in the present disclosure may be interpreted in the same manner.

[0024] Figure 1 The circuit block diagram of the power conversion system 10 of the present application is shown. Figure 1 The power conversion system 10 includes a DC-to-AC circuit 110, an AC-to-DC circuit 120, and a power conversion module 200. The DC-to-AC circuit 110 receives a DC input voltage Vin, and is used to convert the DC input voltage Vin into an AC input voltage Vp; the power conversion module 200 converts the AC input voltage Vp to generate an AC output voltage Vs, and the AC-to-DC circuit 120 is used to convert the AC output voltage Vs into a DC output voltage Vout. The DC-to-AC circuit 110 can be a full-bridge LLC resonant circuit or a phase-shifted full-bridge LLC resonant circuit, and the AC-to-DC circuit 120 can be a full-bridge synchronous rectification circuit.

[0025] Figure 2 A partial exploded view of the power conversion module of the present application is shown. Figure 3 A partial assembly diagram of the power conversion module of the present application is shown. Figure 4 A diagram showing the assembly of the power conversion module of the present application is shown. Figure 5 Draw along Figure 4 The cross-section of the power conversion module along the center line AA. Figures 2 to 5 The power conversion module 200 includes a circuit board 210 and a transformer 220. The transformer 220 is mounted on the circuit board 210 and includes a magnetic core seat 230 and a winding assembly 240. The magnetic core seat 230 is used to provide an induced magnetic field to the winding assembly 240 so that the AC input voltage Vp can be converted into an AC output voltage Vs.

[0026] The magnetic core base 230 includes a first plate 2322, a second plate 2342, a first side column 2324, a second side column 2326 and a middle column 2328; the first plate 2322, the second plate 2342, the first side column 2324 and the second side column 2326 cooperate to form a rectangular ring body, and the middle column 2328 is disposed between the first side column 2324 and the second side column 2326 and contacts the first plate 2322 and the second plate 2342. Figure 2 As shown, the first plate 2322, the first side column 2324, the second side column 2326 and the middle column 2328 are integrally connected and together form a first magnetic core component 232, and the second plate 2342 is a second magnetic core component 234 alone; in other words, the magnetic core seat 230 includes an E-shaped first magnetic core component 232 and an I-shaped second magnetic core component 234. In some embodiments, the magnetic core seat 230 may be composed of a first magnetic core component 232 and a second magnetic core component 234 that are symmetrical in structure and in an E shape. Figure 2 and Figure 3 In the embodiment, the center column 2328 of the first magnetic core member 232 is in the shape of an elliptical column and extends from the center of the first plate 2322; the first side column 2324 and the second side column 2326 extend from the end edge of the first plate 2322 and are located at two opposite sides of the center column 2328. In some embodiments, the center column 2328 may be eccentrically connected to the first plate 2322, or have a rectangular columnar appearance.

[0027] Figure 6 Draw an exploded view of the winding combination, Figure 7 A front view of the winding combination is shown. Figure 8 and Fig. 9 A side view showing the winding combination. Figures 6 to 9 The winding assembly 240 includes a primary winding 250 and a plurality of secondary windings 260a and 260b. The primary winding 250 is electrically coupled to Figure 1 The DC to AC circuit 110 shown in the figure receives an AC input voltage Vp; the secondary windings 260a and 260b are electrically coupled to Figure 1 The AC-DC converter 120 is shown and provides an AC output voltage Vs to the AC-DC converter 120 .

[0028] like Figure 6As shown, the primary winding 250 includes a plurality of coil portions 252 and a plurality of intermediary portions 254, and the coil portions 252 are electrically coupled to each other through the intermediary portions 254. More specifically, the primary winding 252 includes a plurality of coil portions 252 and a plurality of intermediary portions 254 that are staggered. Each coil portion 252 of the primary winding 250 can be formed by winding a wire in a clockwise direction or a counterclockwise direction, and the height of the coil portion 252 is designed to be equal to the diameter of the wire; in other words, in the coil portion 252 of the primary winding 250, the wire is wound along a plane and is not closed, and the normal direction of the plane is a first direction Y.

[0029] In order to reduce the manufacturing process and avoid the transformer 220 being disabled due to poor contact or separation between the coil part 252 and the intermediary part 254, the multiple coil parts 252 and the multiple intermediary parts 254 of the primary winding 250 can be wound by the same wire to achieve an integral connection. The wire can be a single-core or multi-core copper wire or aluminum wire with an insulating layer on the surface, such as an enameled wire. The primary winding 250 can also include a plurality of fixing plates 256, which are sleeved on a part of the coil part 252 to stabilize the structure of the coil part 252 and ensure that the height of each coil part 252 is exactly equal to the diameter of the wire; the fixing plates 256 can be, for example, a flexible and adhesive tape.

[0030] The secondary windings 260a and 260b respectively include a plurality of conductive sheets 262. Each conductive sheet 262 includes a main body 2622, two pins 2624 and two intermediate sections 2626. The main body 2622 is connected to the pins 2624 through the intermediate sections 2626. The pins 2624 extend along a first direction Y, and the intermediate sections 2626 extend along a second direction X. The first direction Y is substantially perpendicular to the second direction X. The main body 2622, the pins 2624 and the intermediate sections 2626 of the conductive sheet 262 may be integrally connected, and may be formed, for example, by first molding or stamping a single-layer plate body in which the main body 2622, the pins 2624 and the intermediate sections 2626 are located in the same plane, and then the open end section of the single-layer plate body is bent to form the pins 2624 for connecting to the circuit board 210. In some embodiments, the main body 2622, the pins 2624 and the intermediate sections 2626 have the same thickness.

[0031] Fig.10 A top view of the conductive sheet is shown. Figure 6 and Fig.10The main body 2622 of the conductive sheet 262 has an outer contour that is roughly elliptical, and a through hole 2623 for the middle column 2328 of the core seat 230 to pass through, and a slot 2625 connected to the through hole 2623 are formed at the center; the through hole 2623 has a contour corresponding to the middle column 2328, and the through hole 2623 and the slot 2625 cooperate to make the main body 2622 have a roughly C-shaped appearance. The intermediate section 2626 is located on both sides of the slot 2625 to connect the main body 2622 and the pin 2624 that are roughly vertically configured. Here, the longest line segment that connects two points on the outer contour of the main body 2622 and passes through a center point C of the main body 2622 is defined as a major axis L, and the line segment that passes through the center point C of the main body 2622 and is perpendicular to the major axis L is defined as a minor axis T; as shown in FIG. Fig.10 As shown, the major axis L passes through the curved portion of the body 2622, the minor axis T passes through the straight portion of the body 2622, and the slot 2625 is located in the curved portion of the body 2622; in other words, compared to the two ends of the minor axis T, the slot 2625 is closer to the two ends of the major axis L.

[0032] The two pins 2624 of each conductive sheet 262 may be located on different planes S1 and S2 whose normal direction is the second direction X. Since the slot 2625 of the conductive sheet 262 is located at the curved portion of the body 2622 and the pins 2624 are located on different planes S1 and S2, the two intermediate sections 2626 of the conductive sheet 262 may have different lengths. In some embodiments, the lengths of the two intermediate sections 2626 of the conductive sheet 262 may be appropriately designed so that the pins 2624 are arranged side by side on a plane S parallel to the short axis T, such as Fig.11 By properly configuring Fig.10 and Fig.11 The conductive sheet 262 is shown in the position of the secondary windings 260a and 260b (for example, Fig.10 The conductive sheet 262 is shown sandwiched between Fig.11 The two conductive sheets 262 shown in the figure can be connected to each other to reduce the overall volume of the transformer 200. In addition, the two pins 2624 of the conductive sheet 262 can have the same width (length in the Z-axis direction) to facilitate forming an opening 212 on the circuit board 210 for the pins 2624 to extend through. In some embodiments, the two intermediate sections 2626 of each conductive sheet 262 can have the same width as the pins 2624, and the width of the connection between the body 2622 and at least one intermediate section 2626 can gradually decrease as it approaches the pin 2624.

[0033] See also Figures 5 to 9In the winding assembly 240, the coil portions 252 of the primary winding 250 and the main bodies 2622 of the conductive sheets 262 of the secondary windings 262a and 262b are arranged in an alternating manner; the intermediate portion 254 of the primary winding 250 passes through the slots 2625 of the conductive sheets 262 and connects the coil portions 252 located above and below the conductive sheets 262. When the winding assembly 240 is assembled with the magnetic core base 230, the alternating coil portions 252 and the main bodies 2622 of the conductive sheets 262 surround the middle column 2328 (such as the first magnetic core member 232) of the first magnetic core member 232. Figure 5 As shown in FIG. 2 ), the magnetic lines of force generated when the power conversion module 200 is in operation can be evenly distributed to achieve optimized magnetic flux induction (ie, reduce leakage inductance). Figure 5 Taking the winding combination 240 composed of the coil portions 252 of seven primary windings 250 and the main bodies 2622 of eight conductive sheets 262 as an example, the leakage inductance thereof is approximately between 1 μH and 5 μH.

[0034] See also Figure 3 and Figure 6 In the winding assembly 240, the pins 2624 of the conductive sheets 262 are distributed on opposite sides of the center column 2328. For example, the pins 2624 of each conductive sheet 262 in the secondary winding 260a are located on one side of the center column 2328, and the pins 2624 of each conductive sheet 262 in the secondary winding 260b are all located on the other side of the center column 2328; when the secondary windings 260a and 260b have the same number of conductive sheets 262, the number of pins 2624 distributed on the two opposite sides of the center column 2328 will be exactly the same. Under the premise that the secondary windings 260a and 260b have the same number of conductive sheets 262, if the connection form of the conductive sheets 262 in the secondary winding 260a is the same as the connection form of the conductive sheets 262 in the secondary winding 260b, the secondary windings 260a and 260b have the same power output capacity.

[0035] Fig. 12A and Fig. 12B The bottom view of the circuit board is shown respectively. The secondary windings 260a and 260b in the winding assembly 240 can be connected in parallel or in series through the conductive pattern 214 arranged on the circuit board 210; wherein the pins 2624 of each conductive sheet 262 in the secondary windings 260a and 260b can be electrically connected to the circuit wiring 214 surrounding the through hole 212 by solder. For example, when the winding assembly 240 and Fig. 12AWhen the circuit board 210 shown is combined, if the common-polarity terminal of the secondary winding 260a is electrically coupled to the circuit pattern 214 disposed at the uppermost left side of the circuit board 210, and its opposite-polarity terminal is electrically coupled to the circuit pattern 214 disposed at the lowermost left side of the circuit board 210; the common-polarity terminal of the secondary winding 260b is electrically coupled to the circuit pattern 214 disposed at the uppermost right side of the circuit board 210, and its opposite-polarity terminal is electrically coupled to the circuit pattern 214 disposed at the lowermost right side of the circuit board 210, then the secondary windings 260a and 260b are connected in series. Similarly, if the common-polarity terminals of the secondary windings 260a and 260b are respectively connected to the circuit pattern 214 disposed at Fig. 12A The uppermost circuit pattern 214 on the left and the lowermost circuit pattern 214 on the right of the circuit board 210 are electrically coupled, so that the secondary windings 260a and 260b are connected in parallel. The circuit board 210 may be, for example, a printed circuit board, on which, in addition to the conductive pattern 214 for connecting the secondary windings 260a and 260b in parallel or in series, a circuit wiring (not shown) for connecting all the conductive sheets 260 in the secondary windings 260a or 260b in series may also be arranged.

[0036] like Figure 3 As shown, the distance between the intermediate section 2626 of the conductive sheet 262 in the secondary windings 260a and 260b and the circuit board 210 gradually increases in the counterclockwise direction. Figure 3 and Figure 6 In order to reduce the volume, in the two conductive sheets 262 whose slots 2625 are closest to each other, one of the intermediate sections 2626 is arranged at different horizontal planes whose normal direction is the first direction Y, so that one of the intermediate sections 2626 of any conductive sheet 262 can be arranged above or below one of the intermediate sections 2626 of another conductive sheet 262. In some embodiments, the intermediate section 2626 of the conductive sheet 262 whose slots 2625 are arranged farther from its long axis L is arranged above the intermediate section 2626 of the conductive sheet 262 whose slots 2625 are arranged closer to its long axis L. In addition, the two pins 2624 connected to the aforementioned two intermediate sections 2626 can be located in different planes whose normal direction is the second direction X; in other words, if the pins 2624 located in different planes whose normal direction is the second direction X have the same width, then from the second direction X, the pins 2624 located at the rear will be completely shielded by the pins 2624 located at the front. For example, when the secondary winding 260a or 260b includes four conductive sheets 262 and has eight pins 2624, the number of pins 2624 that can be directly seen from the side of the winding assembly 240 is five (eg, Figure 8 and Fig. 9 shown).

[0037] Furthermore, if Figures 2 to 4 As shown, two pins 2624 of two conductive sheets 262 located in different planes whose normal direction is the second direction X can partially contact each other so that the two conductive sheets 262 form a series connection; thereby, the complexity of the circuit wiring on the circuit board 210 can be reduced. The aperture of the opening 212 on the circuit board 210 can be appropriately designed to just clamp the two contacting pins 2624 to prevent the pins 2624 from separating during transportation or operation and causing the transformer 220 to become disabled. In some embodiments, an adhesive with conductive properties can be selectively disposed between the contacting pins 2624 to prevent the two pins 2624 connected in series from separating and forming a circuit break.

[0038] Fig.13 A three-dimensional diagram showing the winding combination is shown. Fig.14 A bottom view of the winding combination is shown. Fig.15 An exploded view of the winding assembly is shown. Figures 13 to 15 In the secondary winding 260a or 260b, the pins 2624 of all the conductive sheets 262 are designed to have the same thickness (length in the second direction X) and width (length in the third direction Z); in the two conductive sheets 262 with the slots 2625 closest to each other, the projections of one pin 2624 of each of them on the YZ plane (i.e., the plane whose normal direction is the first direction X) overlap, but the projections of the two pins 2624 on the XY plane (i.e., the plane whose normal direction is the third direction Z) do not overlap and are separated by a distance D. In other words, the two pins 2624 of the two conductive sheets 262 are separated from each other by a distance D. Such a configuration can reduce the difficulty of assembling the winding assembly 240 and the circuit board 210; in the winding assembly 260a or 260b configured in this way, the conductive sheets 262 can achieve the effect of series connection or parallel connection by using the circuit pattern formed on the circuit board 210.

[0039] The present application provides an electric energy conversion module 200, wherein the transformer 220 includes a primary winding 250 and two secondary windings 260a and 260b. The plurality of coil portions 252 of the primary winding 250 and the plurality of conductive sheets 262 of the secondary windings 260a and 260b are installed in a magnetic core base 230 in an alternating configuration, which can effectively reduce leakage inductance. Secondly, the plurality of conductive sheets 262 of the secondary windings 260a and 260b are combined with a circuit board 210 through pins 2624 distributed on two opposite sides of the middle column 2328 of the magnetic core base 230, so as to achieve the effect of connecting the two secondary windings 260a and 260b in series or in parallel. Such a configuration can not only reduce the overall volume of the transformer 200, but also increase the flexibility of the application of the electric energy conversion module 200.

[0040] The above description briefly presents the features of certain embodiments of the present invention, so that those with ordinary knowledge in the technical field to which the present invention belongs can more fully understand the various aspects of the present disclosure. Those with ordinary knowledge in the technical field to which the present invention belongs should understand that they can easily use the present disclosure as a basis to design or change other processes and structures to achieve the same purpose and / or achieve the same advantages as the embodiments described herein. Those with ordinary knowledge in the technical field to which the present invention belongs should understand that these equivalent embodiments still belong to the spirit and scope of the disclosure, and they can be variously changed, replaced and modified without departing from the spirit and scope of the disclosure.

[0041]

Explanation of symbols

[0042] 10: Power conversion system

[0043] 110: DC to AC circuit

[0044] 120: AC to DC circuit

[0045] 200: Power conversion module

[0046] 210: Circuit board

[0047] 212: Opening

[0048] 214: Conductive pattern

[0049] 220: Transformer

[0050] 230: Magnetic core seat

[0051] 232: First magnetic core member

[0052] 234: Second magnetic core member

[0053] 240: Winding combination

[0054] 250: Primary winding

[0055] 252: Coil part

[0056] 254:Intermediary part

[0057] 256: Fixed plate

[0058] 260: Secondary winding

[0059] 262: Conductive sheet

[0060] 2322: First Plate

[0061] 2324: First side column

[0062] 2326: Second side column

[0063] 2328: Middle column

[0064] 2342: Second Plate

[0065] 2622: Main body

[0066] 2623:Piercing

[0067] 2624: Pin

[0068] 2625: Slotting

[0069] 2626:Intermediary segment

[0070] C: Center point

[0071] L: Long axis

[0072] T: short axis

[0073] Vin: DC input voltage

[0074] Vout: DC output voltage

[0075] Vp: AC input voltage

[0076] Vs: AC output voltage

Claims

1. An electric energy conversion module, comprising: A circuit board having at least one conductive pattern disposed thereon; as well as A transformer is disposed on the circuit board, and the transformer comprises: a primary winding comprising at least one coil portion; A plurality of secondary windings, including a plurality of conductive sheets, each of which includes: Two pins extending along a first direction, the transformer is coupled to the circuit board through the two pins to form an electrical connection with the circuit board; a single-layer body having a slot; and Two intermediate sections extending along a second direction, the single-layer body connecting the two pins through the two intermediate sections, the two intermediate sections being located at two sides of the slot, wherein the second direction is perpendicular to the first direction; and A magnetic core base, comprising a center column, the coil portion and the single-layer bodies of the conductive sheets are arranged in an alternating manner, the center column passes through the center of the coil portion and the single-layer bodies of the conductive sheets, and the pins of the conductive sheets are distributed on opposite sides of the center column, There is a spacing distance in the second direction between one pin of each of the two conductive sheets that are arranged closest to each other in each secondary winding.

2. The electric energy conversion module as described in claim 1, wherein the primary winding is formed by spirally winding a conductive wire and comprises a plurality of coil portions and a plurality of intermediate portions, the coil portions are correspondingly wound along a plurality of planes and are not closed, and the coil portions are electrically coupled to each other through the intermediate portions, and the normal directions of the planes are all parallel to the first direction. 3 . The power conversion module as claimed in claim 2 , wherein a height of each of the coil portions is equal to a diameter of the wire. 4 . The power conversion module as claimed in claim 1 , wherein the number of the pins disposed on two opposite sides of the center column is the same.

5. The electric energy conversion module as claimed in claim 1, wherein the single-layer body has a long axis and a short axis, the long axis and the short axis are perpendicular to each other, the two pins of each of the conductive sheets are located in two different planes, and the normal direction of the two planes is the second direction.

6. The electric energy conversion module as claimed in claim 1, wherein the single-layer body has a long axis and a short axis, the long axis and the short axis are perpendicular to each other, the two pins of each of the conductive sheets are located in the same plane, and the normal direction of the plane is the second direction. 7 . The electric energy conversion module as claimed in claim 1 , wherein the single-layer body has a long axis and a short axis, the long axis and the short axis are perpendicular to each other, and the slot is closer to two ends of the long axis than to two ends of the short axis. 8 . The electric energy conversion module as claimed in claim 7 , wherein the single-layer body is straight at both ends of the short axis and not straight at both ends of the long axis, and the two intermediate sections of each of the conductive sheets have different lengths. 9 . The power conversion module as claimed in claim 1 , wherein the secondary windings are connected in parallel or in series through the conductive pattern.

10. The electric energy conversion module as claimed in claim 1, wherein the magnetic core seat comprises: A first magnetic core component, comprising a center column passing through the primary winding and the single-layer bodies, and two side columns located at two opposite sides of the center column; as well as A second core member is disposed on top of the primary winding and the secondary winding and contacts the side legs. 11 . The electric energy conversion module as claimed in claim 1 , wherein the single-layer body, the two intermediate sections, and the two pins of each of the conductive sheets are integrally formed.

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