Winding module, planar transformer and power supply equipment
By adopting a half-turn parallel winding structure in the planar transformer, the problem of magnetic flux imbalance is solved, the number of winding turns is reduced and copper wire losses are lowered, thereby improving the stability and efficiency of the transformer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU SHIHENG ELECTRONIC TECH CO LTD
- Filing Date
- 2025-02-08
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional planar transformers suffer from uneven magnetic flux due to core imbalance when designing the number of winding turns, which increases copper content and losses, affecting normal operation.
The half-turn parallel winding structure is adopted. By splitting the winding into parallel half-turn windings on the wiring board and arranging them on opposite sides of the wiring board, the number of turns of the windings on both sides is consistent, thus achieving magnetic flux balance.
This reduces the number of winding turns and copper wire losses, ensures magnetic flux balance, avoids core saturation, and improves the working stability and efficiency of the planar transformer.
Smart Images
Figure CN224217330U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of planar transformers, specifically to a winding module, a planar transformer, and a power supply device. Background Technology
[0002] Planar transformers are characterized by high efficiency and energy saving, low radiation, low noise, high temperature resistance, and moisture resistance. Compared with traditional transformers, planar transformers consume less power and have lower energy consumption, which can not only effectively reduce electricity costs but also reduce environmental pollution, thereby achieving the goal of energy conservation and environmental protection.
[0003] Currently, in some output applications, planar transformers typically include multiple secondary windings to meet the needs of multiple voltage outputs. The output voltages of different secondary windings are generally different. One output voltage is usually an integer multiple or a fractional multiple of another output voltage. For example, if the first output voltage is 18V and the second output voltage is 12V, then the first output voltage is 1.5 times the second output voltage. In cases where fractional multiples occur, the traditional method for designing the number of winding turns is to ensure that the winding corresponding to the lower output voltage has an integer number of turns. As mentioned earlier, the winding corresponding to 18V has 3 turns, and the winding corresponding to 12V has 2 turns. However, this method increases the amount of copper used due to the large number of winding turns, thus increasing copper wire losses. Although a method has been developed to reduce the number of winding turns by adding half a turn on one side of the magnetic core, since the magnetic core is symmetrical, adding half a turn on one side of the symmetrical magnetic core will result in one side having more winding turns and the other side having fewer winding turns. Therefore, the magnetic core will have a problem of magnetic flux imbalance due to the inconsistent number of winding turns. This problem can easily lead to magnetic core saturation, thereby preventing the planar transformer from working properly. Utility Model Content
[0004] One objective of this invention is to provide a winding module, a planar transformer, and a power supply device to solve the technical problems of excessive copper usage or magnetic flux imbalance in traditional planar transformers.
[0005] In a first aspect, the present invention provides a winding module, the winding module including a wiring board and a secondary winding, the wiring board having a mounting through hole, the wiring board having a primary side and a secondary side opposite to the mounting through hole along a first direction, and a first side and a second side opposite to each other along a second direction, the first direction being perpendicular to the second direction, the secondary winding including a first winding, the first winding including a first half-turn winding and a second half-turn winding connected in parallel, the opposite ends of the first half-turn winding being connected to the primary side and the secondary side respectively, and the first half-turn winding being at least partially arranged on the first side, the opposite ends of the second half-turn winding being connected to the primary side and the secondary side respectively, and the second half-turn winding being at least partially arranged on the second side.
[0006] Optionally, the secondary winding further includes a second winding connected in series with the first winding. The second winding includes a third half-turn and a fourth half-turn connected in parallel. The opposite ends of the third half-turn are respectively connected to the primary side and the secondary side, and the third half-turn is at least partially arranged on the first side. The opposite ends of the fourth half-turn are respectively connected to the primary side and the secondary side, and the fourth half-turn is at least partially arranged on the second side.
[0007] Optionally, the wiring board includes at least one wiring layer, wherein the first winding and the second winding are disposed on the same wiring layer; or,
[0008] The first winding and the second winding are arranged on different wiring layers.
[0009] Optionally, the wiring board has a first wiring module on the primary side and a second wiring module on the secondary side. One end of the first half-turn winding, one end of the second half-turn winding, one end of the third half-turn winding, and one end of the fourth half-turn winding are electrically connected to the first wiring module, and the other end of the first half-turn winding, the other end of the second half-turn winding, the other end of the third half-turn winding, and the other end of the fourth half-turn winding are electrically connected to the second wiring module.
[0010] Optionally, the first wiring module includes a first output terminal and a first tap terminal, and the second wiring module includes a second output terminal and a second tap terminal. The first output terminal is electrically connected to the second output terminal, the first tap terminal is electrically connected to the second tap terminal, one end of the first half-turn winding is electrically connected to the first tap terminal, the other end of the first half-turn winding is electrically connected to the second output terminal, one end of the second half-turn winding is electrically connected to the first output terminal, and the other end of the second half-turn winding is electrically connected to the second tap terminal.
[0011] Optionally, the first wiring module further includes a third output terminal, and the second wiring module further includes a fourth output terminal. The third output terminal is electrically connected to the fourth output terminal. One end of the third half-turn winding is electrically connected to the third output terminal, and the other end of the third half-turn winding is electrically connected to the second tap terminal. One end of the fourth half-turn winding is electrically connected to the first tap terminal, and the other end of the fourth half-turn winding is electrically connected to the fourth output terminal.
[0012] Optionally, the first half-turn winding and the second half-turn winding are symmetrical about the center of the mounting through hole.
[0013] Optionally, the third half-turn winding and the fourth half-turn winding are symmetrical about the center of the mounting through hole.
[0014] In a second aspect, embodiments of the present invention provide a planar transformer, including the winding module described above.
[0015] In a third aspect, embodiments of the present invention provide a power supply device, including the planar transformer described above.
[0016] Compared with the prior art, the present invention provides a winding module, a planar transformer, and a power supply device. The winding module includes a wiring board and a secondary winding. The wiring board has mounting through holes. The wiring board has a primary side and a secondary side opposite to the mounting through holes along a first direction, and a first side and a second side opposite to each other along a second direction. The first direction is perpendicular to the second direction. The secondary winding includes a first winding, which includes a first half-turn winding and a second half-turn winding connected in parallel. The opposite ends of the first half-turn winding are respectively connected to the primary side and the secondary side, and the first half-turn winding is at least partially arranged on the first side. The opposite ends of the second half-turn winding are respectively connected to the primary side and the secondary side, and the second half-turn winding is at least partially arranged on the second side. On the one hand, this embodiment can realize the winding of half-turn windings, thereby reducing the number of turns and the amount of copper used, and thus reducing copper wire loss. On the other hand, this embodiment splits a half-turn winding into two half-turn windings, and then arranges different half-turn windings connected to the primary side and the secondary side respectively on opposite sides of the wiring board. This ensures that the number of turns of the windings on both sides of the wiring board is consistent. Since the two half-turn windings are energized at the same time, it can ensure that the magnetic flux generated on both sides of the wiring board is the same, which is conducive to achieving magnetic flux balance. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the structure of a power supply device provided in one embodiment of this utility model;
[0019] Figure 2 An exploded view of a planar transformer provided as an embodiment of this utility model;
[0020] Figure 3 An exploded view of a planar transformer provided for another embodiment of this utility model;
[0021] Figure 4 A cross-sectional view of a winding module provided in one embodiment of the present utility model;
[0022] Figure 5 A cross-sectional view of a winding module provided for another embodiment of this utility model;
[0023] Figure 6 A schematic diagram of the wiring of a first winding provided for an embodiment of this utility model;
[0024] Figure 7 A schematic diagram of the wiring of a second winding provided for an embodiment of this utility model;
[0025] Figure 8 This is a schematic diagram of the external wiring of a magnetic core provided for an embodiment of the present utility model.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1000, Power supply equipment; 100, Planar transformer; np, Primary winding; 22, Secondary winding; 221, First winding; 222, Second winding; VDC, DC power supply; Q1, First switching transistor; Q2, Second switching transistor; Lr, Resonant inductor; Lm, Resonant capacitor; D1, First diode; D2, Second diode; Co, Output capacitor; 10, Core module; 20, Winding module; 11, First core; 12, Second core; 121, Body part; 122, Core center post; 123, First core side post; 124, Second core side post; 121a, Table Surface; 21, Wiring board; 21e, Mounting through hole; D1, First direction; D2, Second direction; 21a, First side; 21b, Second side; 21c, Primary side; 21d, Secondary side; 2211, First half-turn winding; 2212, Second half-turn winding; 2221, Third half-turn winding; 2222, Fourth half-turn winding; 213, First wiring module; 214, Second wiring module; A1, First output terminal; B1, First tap terminal; C1, Third output terminal; A2, Second output terminal; B2, Second tap terminal; C2, Fourth output terminal. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0029] It should be noted that, unless there is a conflict, the various features in the embodiments of this utility model can be combined with each other, all of which are within the protection scope of this utility model. Furthermore, although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than the module division in the device or the order in the flowchart. Moreover, the terms "first," "second," and "third" used in this utility model do not limit the data or execution order, but only distinguish identical or similar items with essentially the same function and effect.
[0030] One embodiment of this utility model provides a power supply device, which is a device for supplying power to power modules, including but not limited to photovoltaic inverters, energy storage transformers, UPS (Uninterruptible Power Supply), etc. The power modules can be loads, batteries, electronic devices, etc.
[0031] In one embodiment, see Figure 1 The power supply device 1000 includes a planar transformer 100. In other embodiments, the power supply device may also include a substrate (not shown) and peripheral circuitry.
[0032] The planar transformer 100 is disposed on the substrate. The planar transformer 100 can be configured to perform any function, including but not limited to voltage transformation, current transformation, impedance transformation, isolation, etc.
[0033] In one embodiment, the planar transformer 100 includes a primary winding NP and a secondary winding 22. The primary winding NP is used to couple energy to the secondary winding 22 to generate alternating current in the secondary winding 22.
[0034] In one embodiment, the secondary winding 22 includes a first winding 221 and a second winding 222 connected in series.
[0035] In one embodiment, the first winding 221 and / or the second winding 222 includes at least one half-turn winding.
[0036] For example, the first winding 221 includes one half-turn winding and the second winding 222 does not include a half-turn winding; or, the first winding 221 includes two half-turn windings and the second winding 222 includes one half-turn winding; or, the first winding 221 does not include a half-turn winding and the second winding 222 includes two half-turn windings; or, both the first winding 221 and the second winding 222 include two half-turn windings.
[0037] A half-turn winding refers to a winding structure in which some windings only complete half a circumference or are equivalent to half a coil. It is worth noting that half-turn windings do not exist in isolation, but rather cooperate with other full-turn or half-turn windings to form the complete winding system of a planar transformer.
[0038] It is understandable that for the first winding 221 or the second winding 222, if N half-turn windings are connected in series, the number of turns of the coil obtained after the series connection is N*0.5. For example, when the number of turns of the first winding 221 is designed to be 1 turn, the first winding 221 can be split into two half-turn windings, and then the two half-turn windings obtained from the split can be connected in series.
[0039] It is also understandable that, for the first winding 221 or the second winding 222, if it can be split into multiple half-turn windings, it can be completely or partially split. For example, when the number of turns of the first winding 221 is designed to be 1.5 turns, the first winding 221 can be split into a half-turn winding and a 1-turn winding, and then the split half-turn winding and the 1-turn winding can be connected in series.
[0040] In one embodiment, the number of turns in the first winding 221 and / or the second winding 222 is an integer multiple of half a turn. For example, the number of turns in the first winding 221 may be half a turn, 1 turn, 1.5 turns, 2 turns, etc. It is understood that when the number of turns in the first winding 221 is half a turn, the first winding 221 may include one half-turn winding; when the number of turns in the first winding 221 is more than half a turn, the first winding 221 may include one or more half-turn windings. As mentioned earlier, when the number of turns in the first winding 221 is 1.5 turns, the first winding 221 may consist of one half-turn winding and one 1-turn winding, or it may consist of three half-turn windings. The second winding 222 is similar to the first winding 221, and will not be described again here.
[0041] In one embodiment, the number of turns in the first winding 221 may be equal to or different from the number of turns in the second winding 222. For example, both the first winding 221 and the second winding 222 may have half a turn. Another example is that the first winding 221 has half a turn and the second winding 222 has one turn. Yet another example is that the first winding 221 has 1.5 turns and the second winding 222 has one turn.
[0042] The substrate is the basic material for manufacturing power supply equipment 1000, and usually refers to copper-clad laminate. The substrate can be any type of substrate, including but not limited to paper substrate, glass fiber cloth substrate, composite substrate, multilayer board substrate, and substrate of special materials.
[0043] The peripheral circuit is set on the substrate and is used to cooperate with the planar transformer 100 to convert electrical energy into other forms of energy or to provide DC or AC power to the power module.
[0044] In some embodiments, such as Figure 1 As shown, the peripheral circuit includes a DC power supply VDC, a controller, a first switching transistor Q1, a second switching transistor Q2, a resonant inductor Lr, a magnetizing inductor Lm, a resonant capacitor Cr, a first diode D1, a second diode D2, and an output capacitor Co.
[0045] In one embodiment, the positive terminal of the DC power supply VDC is electrically connected to the drain of the first switching transistor Q1, the source of the first switching transistor Q1 is electrically connected to the drain of the second switching transistor Q2 and one end of the resonant inductor Lr, the gates of the first switching transistor Q1 and the second switching transistor Q2 are electrically connected to the controller, the source of the second switching transistor Q2 and one end of the resonant capacitor Cr are electrically connected to the negative terminal of the DC power supply VDC, and the other end of the resonant inductor Lr is electrically connected to one end of the magnetizing inductor Lm and the corresponding terminal of the primary winding np. The other end is electrically connected to the opposite end of the primary winding np and the other end of the resonant capacitor Cr, respectively. The opposite end of the first winding 221 is electrically connected to the anode of the first diode D1. The cathode of the first diode D1 is electrically connected to one end of the output capacitor Co, the cathode of the second diode D2 and one end of the load Ro, respectively. The other end of the output capacitor Co is electrically connected to the same end of the first winding 221, the opposite end of the second winding 222 and the other end of the load Ro, respectively. The same end of the second winding 222 is electrically connected to the anode of the second diode D2.
[0046] It is understandable that the connection point between the same-name terminal of the first winding 221 and the opposite-name terminal of the second winding 222 is a center tap. The center tap is a section of wire pulled out from the center of the secondary winding 22. Its voltage is zero relative to the taps on the other two sides, thus the planar transformer 100 can be called a center-tapped transformer. In a full-wave rectifier circuit, the center-tapped transformer converts alternating current to direct current through two diodes and a resistive load.
[0047] The working principle of the power supply device 1000 is as follows: The controller controls the first switch Q1 and the second switch Q2 to conduct alternately, so that the first switch Q1 and the second switch Q2 convert the DC power supply VDC voltage into a high-frequency square wave. Then, the high-frequency square wave enters the resonant cavity composed of resonant inductor Lr, excitation inductor Lm and resonant capacitor Cr. The resonant cavity eliminates the harmonics of the high-frequency square wave and outputs a fundamental frequency sine wave. The sine wave couples energy to the secondary winding 22 through the primary winding np, so that the secondary winding 22 generates AC current. The first diode D1 and the second diode D2 rectify the AC current and output a stable DC voltage.
[0048] Please refer to the following: Figure 2 and Figure 3 One embodiment of this utility model provides a planar transformer, such as... Figure 2 or Figure 3 As shown, the planar transformer 100 includes a core module 10 and a winding module 20.
[0049] The magnetic core module 10 includes a first magnetic core 11 and a second magnetic core 12 disposed opposite to each other, with the first magnetic core 11 and the second magnetic core 12 covering each other. The first magnetic core 11 or the second magnetic core 12 is mainly made of a magnetic core material, which may include ferrite, silicon steel sheet, etc. The type of ferrite may be nickel-zinc ferrite, manganese-zinc ferrite, and nickel-zinc ferrite. Those skilled in the art can select a suitable magnetic core material according to actual needs.
[0050] The magnetic core shape of the first magnetic core 11 or the second magnetic core 12 can be any shape such as E-type or I-type. Those skilled in the art can select a suitable magnetic core shape according to actual needs.
[0051] In one embodiment, the second magnetic core 12 includes a body portion 121, a core center post 122, a first core side post 123, and a second core side post 124. The body portion 121 is in the shape of a straight plate. The core center post 122 is disposed between the first core side post 123 and the second core side post 124. The core center post 122 may protrude from the middle of the surface 121a of the body portion 121 facing the first magnetic core 11. The core center post 122 may be integrally formed with the body portion 121. The cross-sectional shape of the core center post 122 may be any shape such as circular or square.
[0052] The first magnetic core side post 123 and the second magnetic core side post 124 are arranged at intervals relative to each other. The first magnetic core side post 123 may protrude from one side of the surface 121a, and the second magnetic core side post 124 may protrude from the other side of the surface 121a opposite to one side. In one embodiment, the height of the first magnetic core side post 123 is the same as the height of the second magnetic core side post 124, and is slightly higher than the height of the magnetic core central post 122. When the first magnetic core 11 and the second magnetic core 12 are closed, the first magnetic core side post 123 and the second magnetic core side post 124 can abut against the first magnetic core 11, and a certain space is left between the magnetic core central post 122 and the first magnetic core 11. This space is the air gap. The function of the air gap is to reduce the permeability, so that the linear characteristics depend less on the initial permeability of the magnetic core material. The air gap can also avoid magnetic saturation under large AC signals or DC bias, and better control the inductance.
[0053] The winding module 20 is at least partially located between the body portion 121 and the first magnetic core 11. In one embodiment, the winding module 20 includes a wiring board 21, a primary winding np, and a secondary winding 22. The wiring board 21 is the basic material for laying the primary winding np and the secondary winding 22. Generally, the wiring board 21 is a copper-clad laminate. During the manufacturing process of the winding module 20, the primary winding np and the secondary winding 22 are laid on the wiring board 21 by selectively performing processes such as opening holes, chemical copper plating, electroplating copper, and etching, thereby obtaining the winding module 20.
[0054] In one embodiment, the wiring board 21 includes at least one wiring layer for routing the primary winding np or the secondary winding 22.
[0055] In one embodiment, the wiring board 21 is provided with a mounting through hole 21e, which can be constructed in any shape, including but not limited to rectangle, square, circle, etc. The wiring board 21 is sleeved on the magnetic core central post 122 through the mounting through hole 21e and is located between the first magnetic core side post 123 and the second magnetic core side post 124. Figure 2 As shown, the wiring board 21 has a primary side 21c and a secondary side 21d opposite to the mounting through hole 21e along a first direction D1, and a first side 21a and a second side 21b opposite to each other along a second direction D2, wherein the first direction D1 is perpendicular to the second direction D2.
[0056] In one embodiment, such as Figure 2 As shown, the first side 21a is located to the left of the mounting through hole 21e, the second side 21b is located to the right of the mounting through hole 21e, the primary side 21c is located below the mounting through hole 21e, and the secondary side 21d is located above the mounting through hole 21e.
[0057] Optionally, the primary side 21c is the voltage input side, and the secondary side 21d is the voltage output side.
[0058] In one embodiment, the first side 21a is provided corresponding to the first magnetic core side post 123, and the second side 21b is provided corresponding to the second magnetic core side post 124.
[0059] Optionally, the first side 21a is disposed close to the first magnetic core side post 123, or the first side 21a is disposed adjacent to the first magnetic core side post 123.
[0060] Optionally, the second side 21b is disposed close to the second magnetic core side post 124, or the second side 21b is disposed adjacent to the second magnetic core side post 124.
[0061] In one embodiment, when the wiring board 21 is fitted onto the magnetic core post 122 through the mounting through-hole 21e, the first side 21a is located between the magnetic core post 122 and the first magnetic core side post 123, and the second side 21b is located between the magnetic core post 122 and the second magnetic core side post 124. It is understood that both the first side 21a and the second side 21b have routing channels for winding traces, and the windings arranged on each wiring layer can be routed through these channels.
[0062] In one embodiment, the first winding 221 and the second winding 222 are arranged on the same wiring layer, or the first winding 221 and the second winding 222 are arranged on different wiring layers.
[0063] For example, please see Figure 4The wiring board 21 includes a first wiring layer 211, and the first winding 221 and the second winding 222 are both arranged on the first wiring layer 211.
[0064] For another example, please refer to Figure 5 The wiring board includes a first wiring layer and a second wiring layer. A first winding 221 is arranged on the first wiring layer and a second winding 222 is arranged on the second wiring layer, or the first winding 221 is arranged on the second wiring layer and the second winding 222 is arranged on the first wiring layer.
[0065] In one embodiment, please refer again to Figure 4 and Figure 5 The first winding 221 includes a first half-turn winding 2211 and a second half-turn winding 2212 connected in parallel.
[0066] Both the first half-turn winding 2211 and the second half-turn winding 2212 are windings that have only wound half a circle or are equivalent to half a coil. The first half-turn winding 2211 and the second half-turn winding 2212 can form a half-turn winding when connected in parallel. For an explanation of the half-turn winding, please refer to the above description, which will not be repeated here.
[0067] Optionally, the two ends of the first half-turn winding 2211 are respectively connected to the primary side 21c and the secondary side 21d, and the first half-turn winding 2211 is at least partially arranged on the first side 21a.
[0068] In one embodiment, the first half-turn winding 2211 travels half a turn from the original side 21c along the routing channel of the first side 21a to the secondary side 21d.
[0069] Optionally, the two opposite ends of the second half-turn winding 2212 are connected to the primary side 21c and the secondary side 21d, respectively, and the second half-turn winding 2212 is at least partially arranged on the second side 21b.
[0070] In one embodiment, the second half-turn winding 2212 travels half a turn from the original side 21c along the routing channel of the second side 21b to the secondary side 21d.
[0071] Therefore, on the one hand, this embodiment can realize the winding of one half-turn of the first winding 221, thereby reducing the number of winding turns and the amount of copper used, and thus reducing copper wire loss. On the other hand, this embodiment splits one half-turn of the first winding 221 into two half-turn windings, and then arranges the different half-turn windings connected to the primary side 21c and the secondary side 21d respectively on opposite sides of the wiring board 21. This ensures that the number of winding turns on both sides of the wiring board 21 is consistent. Since the two half-turn windings are energized simultaneously at any time, it ensures that the magnetic flux generated on both sides of the wiring board 21 is the same, which is beneficial to achieving magnetic flux balance. Furthermore, by splitting one half-turn winding into two parallel half-turn windings, heat generation can be effectively reduced.
[0072] In one embodiment, such as Figure 4 or Figure 5 As shown, the second winding 222 includes a third half-turn winding 2221 and a fourth half-turn winding 2222 connected in parallel.
[0073] The third half-turn winding 2221 and the fourth half-turn winding 2222 are both windings that only wind half a circle or are equivalent to half a coil. The third half-turn winding 2221 and the fourth half-turn winding 2222 can form a half-turn winding after being connected in parallel. For an explanation of the half-turn winding, please refer to the above description, which will not be repeated here.
[0074] Optionally, the two opposite ends of the third half-turn winding 2221 are connected to the primary side 21c and the secondary side 21d, respectively, and the third half-turn winding 2221 is at least partially arranged on the first side 21a.
[0075] In one embodiment, the third half-turn winding 2221 travels half a turn from the original side 21c along the routing channel of the first side 21a to the secondary side 21d.
[0076] Optionally, the two ends of the fourth half-turn winding 2222 are respectively connected to the primary side 21c and the secondary side 21d, and the fourth half-turn winding 2222 is at least partially arranged on the second side 21b.
[0077] In one embodiment, the fourth half-turn winding 2222 travels half a turn from the original side 21c along the routing channel of the second side 21b to the secondary side 21d.
[0078] Therefore, on the one hand, this embodiment can realize the winding of one half-turn of the second winding 222, thereby reducing the number of winding turns and the amount of copper used, and thus reducing copper wire loss. On the other hand, this embodiment splits one half-turn of the second winding 222 into two half-turn windings, and then arranges the different half-turn windings connected to the primary side 21c and the secondary side 21d respectively on opposite sides of the wiring board 21. This ensures that the number of winding turns on both sides of the wiring board 21 is consistent. Since the two half-turn windings are energized simultaneously at any time, it ensures that the magnetic flux generated on both sides of the wiring board 21 is the same, which is beneficial to achieving magnetic flux balance. Furthermore, by splitting one half-turn winding into two parallel half-turn windings, heat generation can be effectively reduced.
[0079] In one embodiment, please refer to [the relevant documentation / reference]. Figure 6 and Figure 7 The wiring board 21 has a first wiring module 213 on the primary side 21c. The first wiring module 213 includes a first output terminal A1, a first tap terminal B1 and a third output terminal C1. The first output terminal A1 and the third output terminal C1 are electrically connected to the voltage output terminal of the secondary winding 22.
[0080] Please combine Figure 1 In one embodiment, the first output terminal A1 is electrically connected to the opposite-name terminal of the first winding 221 and the anode of the first diode D1, the third output terminal C1 is electrically connected to the same-name terminal of the second winding 222 and the anode of the second diode D2, and the first tap terminal B1 is electrically connected to the center tap of the secondary winding 22. Please refer to... Figure 1 The first tap terminal B1 is electrically connected to the same-name terminal of the first winding 221 and the opposite-name terminal of the second winding 222.
[0081] It is understandable that the first output terminal A1, the first tap terminal B1, and the third output terminal C1 are terminals that can pass through the entire wiring board 21 or a portion of the wiring layer of the wiring board 21.
[0082] In one embodiment, such as Figure 6 or Figure 7 As shown, the wiring board 21 has a second wiring module 214 on the secondary side 21d. The second wiring module 214 includes a second output terminal A2, a second tap terminal B2 and a fourth output terminal C2. The second output terminal A2 and the fourth output terminal C2 are electrically connected to the voltage output terminal of the secondary winding 22.
[0083] Please combine Figure 1In one embodiment, the second output terminal A2 is electrically connected to the opposite-named terminal of the first winding 221 and the anode of the first diode D1, the fourth output terminal C2 is electrically connected to the same-named terminal of the second winding 222 and the anode of the second diode D2, and the second tap terminal B2 is electrically connected to the center tap of the secondary winding 22. Please refer to... Figure 1 In one embodiment, the second tap terminal B2 is electrically connected to the same-name terminal of the first winding 221 and the opposite-name terminal of the second winding 222.
[0084] It is understandable that the second output terminal A2, the second tap terminal B2, and the fourth output terminal C2 are terminals that can pass through the entire wiring board 21 or a portion of the wiring layer of the wiring board 21.
[0085] Therefore, by opening a first output terminal A1, a first tap terminal B1 and a third output terminal C1 on the primary side 21c of the wiring board 21, and opening a second output terminal A2, a second tap terminal B2 and a fourth output terminal C2 on the secondary side 21d of the wiring board 21, the center tap of the secondary winding 22 can be placed on the primary side, which is suitable for some low-voltage and high-current applications and facilitates routing on the wiring board 21.
[0086] In one embodiment, the first output terminal A1 is electrically connected to the second output terminal A2 via a trace, the first tap terminal B1 is electrically connected to the second tap terminal B2 via a trace, and the third output terminal C1 is electrically connected to the fourth output terminal C2 via a trace. It is understood that these traces can be routed on the wiring board 21. In another embodiment, please refer to... Figure 8 These wirings can also be completed outside the core module 10.
[0087] In one embodiment, please refer again Figure 6 and Figure 7 The first end of the first half-turn winding 2211, the first end of the second half-turn winding 2212, the first end of the third half-turn winding 2221, and the first end of the fourth half-turn winding 2222 are electrically connected to the first wiring module 213, and the second end of the first half-turn winding 2211, the second end of the second half-turn winding 2212, the second end of the third half-turn winding 2221, and the second end of the fourth half-turn winding 2222 are electrically connected to the second wiring module 214.
[0088] In one embodiment, such as Figure 6As shown, the first end of the first half-turn winding 2211 is electrically connected to the first tap terminal B1, and the second end of the first half-turn winding 2211 is electrically connected to the second output terminal A2. The first half-turn winding 2211 travels half a turn from the first tap terminal B1 on the original side 21c along the wiring channel between the magnetic core central post 122 and the first magnetic core side post 123 to the second output terminal A2 on the secondary side 21d.
[0089] The first end of the second half-turn winding 2212 is electrically connected to the first output terminal A1, and the second end of the second half-turn winding 2212 is electrically connected to the second tap terminal B2. The second half-turn winding 2212 travels half a turn from the first output terminal A1 of the original side 21c along the wiring channel between the magnetic core central post 122 and the second magnetic core side post 124 to the second tap terminal B2 of the secondary side 21d.
[0090] As mentioned above, since the first end of the first half-turn winding 2211, the first tap terminal B1, the second tap terminal B2, and the second end of the second half-turn winding 2212 are all connected together, and the second end of the first half-turn winding 2211, the second output terminal A2, the first output terminal A1, and the first end of the second half-turn winding 2212 are all connected together, the first half-turn winding 2211 and the second half-turn winding 2212 are in parallel.
[0091] Therefore, this embodiment not only allows the center tap of the secondary winding 22 to be placed on the primary side, but also facilitates the parallel connection of the first half-turn winding 2211 and the second half-turn winding 2212, thereby facilitating the formation of a half-turn winding of the first winding 221.
[0092] In some embodiments, such as Figure 6 As shown, the first half-turn winding 2211 and the second half-turn winding 2212 are symmetrical about the center of the mounting through hole 21e.
[0093] Since the first half-turn winding 2211 and the second half-turn winding 2212 are symmetrical about the center of the mounting through hole 21e, it can be ensured that the impedance of the first half-turn winding 2211 is equal to the impedance of the second half-turn winding 2212, thereby improving the consistency of the magnetic flux generated on the two magnetic core side posts.
[0094] In some embodiments, such as Figure 7 As shown, the first end of the third half-turn winding 2221 is electrically connected to the third output terminal C1, and the second end of the third half-turn winding 2221 is electrically connected to the second tap terminal B2. The third half-turn winding 2221 travels half a turn from the third output terminal C1 of the original side 21c along the wiring channel between the magnetic core central post 122 and the first magnetic core side post 123 to the second tap terminal B2 of the secondary side 21d.
[0095] The first end of the fourth half-turn winding 2222 is electrically connected to the first tap terminal B1, and the second end of the fourth half-turn winding 2222 is electrically connected to the fourth output terminal C2. The fourth half-turn winding 2222 travels half a turn from the first tap terminal B1 of the original side 21c along the wiring channel between the magnetic core central post 122 and the second magnetic core side post 124 to the fourth output terminal C2 of the secondary side 21d.
[0096] As mentioned above, since the first end of the third half-turn winding 2221, the third output terminal C1, the fourth output terminal C2, and the second end of the fourth half-turn winding 2222 are all connected together, and the second end of the third half-turn winding 2221, the first tap terminal B1, the second tap terminal B2, and the first end of the fourth half-turn winding 2222 are all connected together, the third half-turn winding 2221 and the fourth half-turn winding 2222 are in parallel.
[0097] Therefore, this embodiment not only allows the center tap of the secondary winding 22 to be placed on the primary side, but also facilitates the parallel connection of the third half-turn winding 2221 and the fourth half-turn winding 2222, thereby facilitating the formation of a half-turn winding of the second winding 222.
[0098] In some embodiments, such as Figure 7 As shown, the third half-turn winding 2221 and the fourth half-turn winding 2222 are symmetrical about the center of the mounting through hole 21e.
[0099] Since the third half-turn winding 2221 and the fourth half-turn winding 2222 are symmetrical about the center of the mounting through hole 21e, it can be ensured that the impedance of the third half-turn winding 2221 is equal to the impedance of the fourth half-turn winding 2222, thereby improving the consistency of the magnetic flux generated on the two core side posts.
[0100] Understandably, as mentioned earlier, the secondary winding 22 is obtained by connecting the first winding 221 and the second winding 222 in series. Therefore, the number of turns in the secondary winding 22 is the sum of the number of turns in the first winding 221 and the second winding 222. For example, when the first winding 221 has half a turn and the second winding 222 has one turn, the secondary winding 22 has 1.5 turns. In this case, the first winding 221 can be composed of a half-turn winding, and the second winding 222... 2 can be composed of two half-turn windings connected in series. In one embodiment of this utility model, each half-turn winding can be split into two half-turn windings, and then the two half-turn windings are respectively run along the two magnetic core side posts. Regardless of whether the number of turns of the secondary winding 22 is an integer or a fraction of turns, and regardless of whether the number of turns of the first winding 221 and the number of turns of the second winding 222 are equal, it can be ensured that the magnetic flux generated on the two magnetic core side posts is the same, thereby achieving magnetic flux balance.
[0101] Finally, it should be noted that this utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, within the framework of this utility model, the above-mentioned technical features can be combined with each other, and many other variations of different aspects of this utility model as described above exist, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A winding module, characterized in that, The winding module includes a wiring board and a secondary winding. The wiring board has mounting through holes and has a primary side and a secondary side opposite to the mounting through holes along a first direction, and a first side and a second side opposite to each other along a second direction. The first direction is perpendicular to the second direction. The secondary winding includes a first winding, which includes a first half-turn winding and a second half-turn winding connected in parallel. The opposite ends of the first half-turn winding are respectively connected to the primary side and the secondary side, and the first half-turn winding is at least partially arranged on the first side. The opposite ends of the second half-turn winding are respectively connected to the primary side and the secondary side, and the second half-turn winding is at least partially arranged on the second side.
2. The winding module according to claim 1, characterized in that, The secondary winding also includes a second winding connected in series with the first winding. The second winding includes a third half-turn and a fourth half-turn connected in parallel. The opposite ends of the third half-turn are respectively connected to the primary side and the secondary side, and the third half-turn is at least partially arranged on the first side. The opposite ends of the fourth half-turn are respectively connected to the primary side and the secondary side, and the fourth half-turn is at least partially arranged on the second side.
3. The winding module according to claim 2, characterized in that, The wiring board includes at least one wiring layer, wherein the first winding and the second winding are disposed on the same wiring layer; or... The first winding and the second winding are arranged on different wiring layers.
4. The winding module according to claim 2 or 3, characterized in that, The wiring board has a first wiring module on the primary side and a second wiring module on the secondary side. One end of the first half-turn winding, one end of the second half-turn winding, one end of the third half-turn winding, and one end of the fourth half-turn winding are electrically connected to the first wiring module. The other ends of the first half-turn winding, the second half-turn winding, the third half-turn winding, and the fourth half-turn winding are electrically connected to the second wiring module.
5. The winding module according to claim 4, characterized in that, The first wiring module includes a first output terminal and a first tap terminal, and the second wiring module includes a second output terminal and a second tap terminal. The first output terminal and the second output terminal are electrically connected, the first tap terminal and the second tap terminal are electrically connected, one end of the first half-turn winding is electrically connected to the first tap terminal, the other end of the first half-turn winding is electrically connected to the second output terminal, one end of the second half-turn winding is electrically connected to the first output terminal, and the other end of the second half-turn winding is electrically connected to the second tap terminal.
6. The winding module according to claim 5, characterized in that, The first wiring module further includes a third output terminal, and the second wiring module further includes a fourth output terminal. The third output terminal is electrically connected to the fourth output terminal. One end of the third half-turn winding is electrically connected to the third output terminal, and the other end of the third half-turn winding is electrically connected to the second tap terminal. One end of the fourth half-turn winding is electrically connected to the first tap terminal, and the other end of the fourth half-turn winding is electrically connected to the fourth output terminal.
7. The winding module according to claim 1, characterized in that, The first half-turn winding and the second half-turn winding are symmetrical about the center of the mounting through hole.
8. The winding module according to claim 2 or 3, characterized in that, The third half-turn winding and the fourth half-turn winding are symmetrical about the center of the mounting through hole.
9. A planar transformer, characterized in that, The system includes a magnetic core module and a winding module as described in any one of claims 1 to 8. The magnetic core module includes a first magnetic core side post, a second magnetic core side post, and a magnetic core center post. The first magnetic core side post and the second magnetic core side post are arranged at a distance from each other, and the magnetic core center post is disposed between the first magnetic core side post and the second magnetic core side post. The wiring board is sleeved on the magnetic core center post through the mounting through hole and is located between the first magnetic core side post and the second magnetic core side post. The first side is disposed corresponding to the first magnetic core side post, and the second side is disposed corresponding to the second magnetic core side post.
10. A power supply device, characterized in that, Including the planar transformer as described in claim 9.