Transformer and synchronous rectification assembly
Patent Information
- Application Number
- CN202323407710.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-13
Smart Images
Figure CN222380396U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of power supply, and in particular to a transformer and a synchronous rectification component. Background Art
[0002] With the continuous development of power technology, power modules are gradually moving towards miniaturization and high power density. Synchronous rectification components are widely used due to their high space utilization, high power density and high efficiency.
[0003] In the related art, the synchronous rectification component may include a switch element, a transformer, a rectification element and a filter element. The transformer may include a primary winding and a secondary winding, the primary winding is electrically connected to the switch element, the secondary winding is electrically connected to the rectification element, and the rectification element may be electrically connected to the filter element. The current output by the secondary winding of the transformer is rectified by the rectification element and then transmitted to the filter element for filtering.
[0004] However, the losses of the secondary winding are relatively high, which results in relatively high losses in the transformer and the synchronous rectification components. Utility Model Content
[0005] In view of at least one of the above technical problems, an embodiment of the present application provides a transformer and a synchronous rectification component, which can reduce the loss of the secondary winding, thereby reducing the loss of the transformer and the synchronous rectification component.
[0006] The embodiments of the present application provide the following technical solutions:
[0007] A first aspect of an embodiment of the present application provides a transformer, comprising a magnetic component, at least one primary winding and at least one secondary winding, the magnetic component comprising a winding portion, the at least one primary winding and the at least one secondary winding being arranged on at least a portion of the periphery of the winding portion; each secondary winding comprising a plurality of conductors arranged along the circumference of the winding portion, wherein each conductor comprises two ends located on opposite sides, and two adjacent ends between two adjacent conductors are located on the same side and together form an output end, and each secondary winding comprises at least two output ends.
[0008] The transformer provided in the embodiment of the present application may include a magnetic part, at least one primary winding and at least one secondary winding, the magnetic part may include a winding portion, and at least one primary winding and at least one secondary winding may be arranged on at least a portion of the periphery of the winding portion. Each secondary winding may include a plurality of conductors arranged along the circumference of the winding portion, wherein each conductor may include two ends located on opposite sides, and two adjacent ends between two adjacent conductors are located on the same side and together form an output end, and each secondary winding may include at least two output ends. In this arrangement, the secondary winding can output a voltage through at least two output ends, thereby reducing the current in the secondary winding, so as to reduce the loss of the secondary winding, thereby reducing the loss of the transformer and the synchronous rectification component.
[0009] In a possible implementation manner, each secondary winding includes a first secondary winding and a second secondary winding arranged along an extension direction of the winding portion.
[0010] In a possible implementation, the transformer further includes a winding frame having a receiving hole, the winding frame having a receiving hole, the winding portion being inserted into the receiving hole, and the primary winding and the secondary winding are both arranged on at least a portion of the periphery of the winding frame.
[0011] In a possible implementation, the magnetic member includes a first magnetic member and a second magnetic member, and the first magnetic member and the second magnetic member each include a connected winding portion and a covering portion, and the covering portion covers at least a portion of the outer side of the winding portion;
[0012] The winding portion of the first magnetic component is inserted into one end of the accommodating hole, and the winding portion of the second magnetic component is inserted into the other end of the accommodating hole. The covering portion of the first magnetic component and the covering portion of the second magnetic component are both covered on the outside of part of the primary winding and the secondary winding.
[0013] In a possible implementation manner, there are multiple primary windings and multiple secondary windings, and the primary windings and the secondary windings are alternately arranged along the extension direction of the winding portion.
[0014] In a possible implementation, in the same secondary winding, the first secondary winding and the second secondary winding are isolated from each other by an insulating member, and a distance between the first secondary winding and the second secondary winding is in a range of 0.05 mm to 0.25 mm.
[0015] In a possible implementation manner, a locking structure is provided on the winding frame, and the secondary winding is provided on the locking structure to be fixed on the winding frame.
[0016] In a possible implementation manner, the secondary winding and the winding frame are formed in one piece.
[0017] A second aspect of an embodiment of the present application provides a synchronous rectification component, comprising: at least two rectification filters and the transformer in the above-mentioned first aspect, wherein the at least two rectification filters are electrically connected to at least two output terminals of the transformer respectively.
[0018] The synchronous rectification component provided in the embodiment of the present application may include a transformer, the transformer may include a magnetic part, a primary winding and a secondary winding, the magnetic part may include a winding part, and the primary winding and the secondary winding may be arranged on at least a portion of the outer periphery of the winding part. Each secondary winding may include a plurality of conductors arranged along the circumference of the winding part, wherein each conductor may include two ends located on opposite sides, and the two adjacent ends between two adjacent conductors are located on the same side and together form an output end, and each secondary winding may include at least two output ends. In this way, the secondary winding can output a voltage through at least two output ends, thereby reducing the current in the secondary winding, so as to reduce the loss of the secondary winding, thereby reducing the loss of the transformer and the synchronous rectification component.
[0019] In a possible embodiment, each rectifier filter includes a circuit board and electronic components, and multiple secondary windings of the transformer are arranged along the extension direction of the winding portion of the transformer. Along the circumference of the winding portion, the output ends of the multiple secondary windings located on the same side together form an output end group, and the multiple secondary windings include at least two output end groups, and the at least two output end groups are arranged at intervals along the outer circumference of the winding portion. The at least two output end groups are correspondingly connected to the circuit boards of at least two rectifier filters.
[0020] In a possible implementation, the circuit board includes a first surface and a second surface that are arranged opposite to each other along a thickness direction, and at least one of the first surface and the second surface is provided with an electronic component.
[0021] In a possible implementation, each secondary winding includes a first secondary winding and a second secondary winding arranged along an extension direction of the winding portion, and in the same rectifier filter, the electronic component includes a first electronic component and a second electronic component, the first electronic component is located on the first surface, and the second electronic component is located on the second surface;
[0022] The output end group includes a first output end group and a second output end group. The output ends of multiple first secondary windings located on the same side together form the first output end group and are electrically connected to the first electronic component. The output ends of multiple second secondary windings located on the same side together form the second output end group and are electrically connected to the second electronic component.
[0023] In a possible implementation, on the same circuit board, an orthographic projection of the first electronic component on the plane where the circuit board is located at least partially overlaps with an orthographic projection of the second electronic component on the plane where the circuit board is located.
[0024] In one possible implementation, the electronic component includes a rectifying element and a filtering element that are electrically connected;
[0025] On the same circuit board, the direction from the rectifying element to the filtering element of the first electronic component is a first direction, and the direction from the rectifying element to the filtering element of the second electronic component is a second direction. The first direction and the second direction are the same, or the first direction and the second direction are different.
[0026] In a possible implementation, the circuit board has a plurality of conductive holes arranged at intervals, the output end is inserted into the corresponding conductive hole of the circuit board, and is electrically connected to the corresponding electronic component through the conductive hole.
[0027] The construction of the present application as well as its other objects and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0029] Figure 1 A schematic diagram of the split structure of the transformer provided in an embodiment of the present application;
[0030] Figure 2 A schematic diagram of another split structure of the transformer provided in an embodiment of the present application;
[0031] Figure 3 A schematic diagram of the structure of multiple secondary windings provided in an embodiment of the present application;
[0032] Figure 4 A schematic diagram of the structure of a secondary winding provided in an embodiment of the present application;
[0033] Figure 5a A schematic diagram of another split structure of the transformer provided in an embodiment of the present application;
[0034] Figure 5b A schematic diagram of another split structure of the transformer provided in an embodiment of the present application;
[0035] Figure 5c A schematic diagram of another split structure of the transformer provided in an embodiment of the present application;
[0036] Figure 6 Another schematic diagram of the structure of multiple secondary windings provided in an embodiment of the present application;
[0037] Figure 7 Another structural schematic diagram of a secondary winding provided in an embodiment of the present application;
[0038] Figure 8 A top view of a rectifier filter provided in an embodiment of the present application;
[0039] Fig. 9 A top view of a first surface of a rectifier filter provided in an embodiment of the present application;
[0040] Fig.10 A top view of the second surface of the rectifier filter provided in an embodiment of the present application;
[0041] Fig.11 Another top view of the second surface of the rectifier filter provided in an embodiment of the present application.
[0042] Description of reference numerals:
[0043] 100: Transformer; 110: Magnetic parts;
[0044] 111: a first magnetic member; 112: a second magnetic member;
[0045] 113: winding part; 114: cover part;
[0046] 120: primary winding; 130: secondary winding;
[0047] 131: first secondary winding; 132: second secondary winding;
[0048] 133: electrical conductor; 1331: first end portion;
[0049] 1332: second end portion; 133a: first conductor;
[0050] 133b: second conductor; 133c: third conductor;
[0051] 133d: fourth conductor; 134: output terminal;
[0052] 1341: first output terminal; 1342: second output terminal;
[0053] 135: output terminal group; 1351: first output terminal group;
[0054] 1352: second output terminal group; 140: winding frame;
[0055] 141: Accommodation hole; 200: Rectifier filter;
[0056] 210: circuit board; 211: first surface;
[0057] 212: second surface; 220: electronic component;
[0058] 221: a first electronic component; 222: a second electronic component;
[0059] 223: rectifier element; 224: filter element;
[0060] 230: conductive hole; 231: first conductive hole;
[0061] 232: second conductive via. DETAILED DESCRIPTION
[0062] In the related art, the transformer may include a primary winding and a secondary winding, the primary winding may be electrically connected to the switch element, the secondary winding may be electrically connected to the rectifier element, and the rectifier element may be electrically connected to the filter element. The current output by the secondary winding of the transformer is rectified by the rectifier element and then transmitted to the filter element for filtering. The secondary winding may include an annular copper sheet and an output end disposed on the periphery of the annular copper sheet and protruding outward, and the output end may be electrically connected to the rectifier element.
[0063] However, since the voltages on the secondary windings are all output through the same output terminal, the current in the secondary windings is relatively large, resulting in high losses in the secondary windings, thereby resulting in high losses in the transformer and the synchronous rectification component.
[0064] Based on at least one of the above technical problems, an embodiment of the present application provides a transformer and a synchronous rectification component. The transformer may include a magnetic part, a primary winding and a secondary winding. The magnetic part may include a winding portion. The primary winding and the secondary winding may be arranged on at least a portion of the outer periphery of the winding portion. The secondary winding may include a plurality of conductors arranged along the circumference of the winding portion, wherein each conductor may include two ends located on opposite sides, and the two adjacent ends between two adjacent conductors are located on the same side and together form an output end. The secondary winding may include at least two output ends. In this way, the secondary winding can output a voltage through at least two output ends, thereby reducing the current in the secondary winding to reduce the loss of the secondary winding, thereby reducing the loss of the transformer and the synchronous rectification component.
[0065] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0066] The following will be combined Figure 1-Figure 11The synchronous rectification component provided in the embodiment of the present application is described.
[0067] See also Figure 1 and Figure 8 , an embodiment of the present application provides a synchronous rectification component, which may include a transformer 100 and a rectification filter 200, and the primary winding 120 of the transformer 100 may be electrically connected to a switching element. The switching element may be electrically connected to an input terminal. The input terminal is electrically connected to the primary winding 120 of the transformer 100 through a switching element. For example, an alternating current may be input to the input terminal. The secondary winding 130 of the transformer 100 may be electrically connected to the rectification filter 200, and the rectification filter 200 may be electrically connected to a load. The rectification filter 200 may be used to rectify and filter the current of the secondary winding 130 to generate a desired output voltage.
[0068] The transformer 100 provided in the embodiment of the present application is described below.
[0069] See also Figure 1 and Figure 2 The transformer 100 may include a primary winding 120, a secondary winding 130 and a magnetic member 110. When the alternating current inputted from the input end passes through the primary winding 120, an alternating magnetic field is generated, which is transmitted to the secondary winding 130 through the magnetic member 110, and a voltage is induced in the secondary winding 130, thereby forming a current in the secondary winding 130, and the secondary winding 130 transmits electric energy to the load. The transformer 100 realizes voltage conversion by transmitting electric energy from the primary winding 120 to the secondary winding 130.
[0070] Exemplarily, the number of the primary winding 120 and the number of the secondary winding 130 can be at least one. The embodiment of the present application is described by taking the case where both the primary winding 120 and the secondary winding 130 are multiple as an example. The primary winding 120 and the secondary winding 130 can be alternately arranged along the extension direction of the winding portion 113 to reduce the transformer leakage inductance and winding loss.
[0071] For example, see Figure 1 and Figure 2 The transformer 100 may include a bobbin 140, and the bobbin 140 may be used for winding the primary winding 120. The primary winding 120 and the secondary winding 130 may be disposed on at least a portion of the outer circumference of the bobbin 140. The bobbin 140 may have a receiving hole 141 therein.
[0072] For example, see Figure 1 and Figure 2The magnetic member 110 may include a winding portion 113, the winding portion 113 may be inserted into the receiving hole 141, and the winding frame 140 is located between the winding portion 113 and the primary winding 120 and the secondary winding 130. At this time, the primary winding 120 and the secondary winding 130 may be disposed on at least a portion of the outer periphery of the winding portion 113.
[0073] For example, see Figure 1 and Figure 2 The magnetic member 110 may include a first magnetic member 111 and a second magnetic member 112. The first magnetic member 111 and the second magnetic member 112 may each include a winding portion 113 and a cover portion 114. The winding portion 113 and the cover portion 114 may be connected, and the cover portion 114 may be covered at least partially outside the winding portion 113. The cover portion 114 and the winding portion 113 are used to form the magnetic member 110 together, so that the total volume of the magnetic member 110 can be increased, which is beneficial to reducing the loss and noise of the transformer 100. For example, the first magnetic member 111 and the second magnetic member 112 may be roughly E-shaped.
[0074] Among them, the winding part 113 of the first magnetic part 111 can be inserted into one end of the accommodating hole 141, and the winding part 113 of the second magnetic part 112 can be inserted into the other end of the accommodating hole 141. The covering part 114 of the first magnetic part 111 and the covering part 114 of the second magnetic part 112 can both be covered on part of the outside of the primary winding 120 and the secondary winding 130, so as to play a certain protective role on the primary winding 120, the secondary winding 130, the winding frame 140 and the winding part 113.
[0075] For example, see Figure 1 The winding frame 140 is also provided with a locking structure (not shown in the figure) for fixing the secondary winding 130 on the winding frame 140, thereby providing convenience and accuracy in fixing the secondary winding 130. The locking structure can be in the form of a groove, a buckle, etc., and the present case is not limited thereto. As long as the structure can fix the secondary winding 130 on the winding frame 140, it is considered to be within the scope of protection of this application.
[0076] For example, see Figure 1 The winding frame 140 and the secondary winding 130 can also be integrally formed. Specifically, the winding frame 140 and the secondary winding 130 can be placed in a mold and then integrally formed by methods such as glue pouring. As a result, there is no need to place the secondary winding 130 on the winding frame 140 through additional processing, thereby improving the reliability and accuracy of fixing the secondary winding 130 and facilitating automated processing.
[0077] The secondary winding 130 provided in the embodiment of the present application is described below.
[0078] See also Figure 1 and Figure 4 , each secondary winding 130 may include a plurality of conductors 133 arranged along the circumference of the winding portion 113. The number of conductors 133 in each secondary winding 130 may be 2, 3, 4 or any number greater than 4. Each conductor 133 may include two ends located on different sides, and the two ends may be ends on both sides of the extension direction of the conductor 133, and the two ends may include a first end 1331 and a second end 1332. The different sides refer to both sides of the extension direction of the conductor 133. The two adjacent ends between two adjacent conductors 133 may be located on the same side, and the same side refers to the same side in the circumferential direction of the winding portion 113. The two adjacent ends between two adjacent conductors 133 may jointly form an output end 134. That is, the first end 1331 of one of the two adjacent conductors 133 and the second end 1332 of the other may be arranged adjacent to each other and located on the same side in the circumferential direction of the winding portion 113. The first end 1331 of one of the two adjacent conductors 133 and the second end 1332 of the other conductor can jointly form an output end 134. The output end 134 can be used to be electrically connected to the rectifier filter 200. Each secondary winding 130 can include at least two output ends 134, and the at least two output ends 134 of the transformer 100 can be electrically connected to at least two rectifier filters 200 respectively.
[0079] For example, the total output power of the transformer 100 may be W, the final output voltage may be U, and the number of output terminals 134 in the same secondary winding 130 may be N. In the related art, an annular copper sheet is used to form the secondary winding, and the current on the secondary winding is output through the same output terminal, and the current I1 on the secondary winding is W / U. In the embodiment of the present application, a plurality of conductors 133 are used to form the secondary winding 130, and the secondary winding 130 includes a plurality of output terminals 134, the output voltage of a single output terminal 134 is U, and the total voltage of the outputs of the plurality of output terminals 134 is NU, and the current I2 on the secondary winding 130 is W / (NU). It can be seen from this that I2=I1 / N. When multiple conductors 133 of the embodiment of the present application are used to form the secondary winding 130, and the secondary winding 130 includes multiple output terminals 134, the current in the secondary winding 130 can be effectively reduced to reduce the loss of the secondary winding 130, thereby reducing the loss of the transformer 100 and the synchronous rectification component, which is beneficial to optimizing the heat dissipation effect.
[0080] In addition, in the related art, due to the large loss of the secondary winding, in order to reduce the loss of the secondary winding, the frequency of the switching element is usually set to a lower level, which leads to the problem of slow dynamic response. In the related art, the voltage U induced by the secondary winding is ndΦ / dt1. In the embodiment of the present application, the total voltage NU induced by the secondary winding 130 is ndΦ / dt2. It can be seen that, under the premise that the magnetic flux dΦ remains unchanged, the frequency 1 / dt2 of the switching element in the embodiment of the present application is N times the frequency 1 / dt1 of the switching element in the embodiment of the related technology, that is, the secondary winding 130 in the embodiment of the present application can increase the frequency of the switching element, thereby optimizing the problem of slow dynamic response. Secondly, by increasing the frequency of the switching element, the embodiment of the present application is conducive to reducing the volume of the magnetic part 110 and the transformer 100, thereby improving the power density of the synchronous rectification component.
[0081] The number of output terminals 134 in the same secondary winding 130 of the embodiment of the present application is described below.
[0082] See also Figure 1 and Figure 4 , two adjacent ends between two adjacent conductors 133 can jointly form an output end 134. In the same secondary winding 130, the number of the output ends 134 can be equal to the number of the conductors 133.
[0083] See also Figure 4 , taking the case where there are two conductors 133 in the same secondary winding 130, the two conductors 133 can be a first conductor 133a and a second conductor 133b, respectively, and the first end 1331 of the first conductor 133a and the second end 1332 of the second conductor 133b can form an output end 134, and the second end 1332 of the first conductor 133a and the first end 1331 of the second conductor 133b can form an output end 134. That is, the two conductors 133 can form two output ends 134. And the two output ends 134 can be electrically connected to the two rectifier filters 200 in a one-to-one correspondence. It should be noted that the first end 1331 and the second end 1332 here are only for illustrating the relative positions of the pins of the two conductors 133, and do not constitute a limitation on the structure. In other embodiments of the present case, the first end 1331 of the first conductor 133a and the first end 1331 of the second conductor 133b may form an output end 134, and the second end 1332 of the first conductor 133a and the second end 1332 of the second conductor 133b may form an output end 134.
[0084] See also Figure 5aFor example, if there are three conductors 133 in the same secondary winding 130, the three conductors 133 may be a first conductor 133a, a second conductor 133b, and a third conductor 133c, respectively. The second end 1332 of the first conductor 133a and the first end 1331 of the second conductor 133b may form an output end 134, the second end 1332 of the second conductor 133b and the first end 1331 of the third conductor 133c may form an output end 134, and the second end 1332 of the third conductor 133c and the first end 1331 of the first conductor 133a may form an output end 134. That is, the three conductors 133 may form three output ends 134. The three output ends 134 may be electrically connected to the three rectifier filters 200 in a one-to-one correspondence.
[0085] See also Figure 5b Taking the case where there are four conductors 133 in the same secondary winding 130 as an example, the four conductors 133 may be a first conductor 133a, a second conductor 133b, a third conductor 133c, and a fourth conductor 133d, respectively. The second end 1332 of the first conductor 133a and the first end 1331 of the second conductor 133b may form an output end 134, the second end 1332 of the second conductor 133b and the first end 1331 of the third conductor 133c may form an output end 134, the second end 1332 of the third conductor 133c and the first end 1331 of the fourth conductor 133d may form an output end 134, and the second end 1332 of the fourth conductor 133d and the first end 1331 of the first conductor 133a may form an output end 134. That is, the four conductors 133 may form four output ends 134. The four output ends 134 may be electrically connected to the four rectifier filters 200 in a one-to-one correspondence.
[0086] For example, the conductor 133 may be made of copper or other metal materials. In the embodiment where the conductor 133 is made of copper, copper has a lower resistivity, which is beneficial to reducing heat generation. In addition, copper has better thermal conductivity, which is beneficial to heat dissipation of the conductor 133.
[0087] The rectifier filter 200 provided in the embodiment of the present application is described below.
[0088] See also Figure 4 and Figure 8Each rectifier filter 200 may include a circuit board 210 and an electronic component 220, and the output end 134 of the secondary winding 130 may be electrically connected to the electronic component 220 of the corresponding rectifier filter 200 through the circuit board 210 of the corresponding rectifier filter 200. The circuit board 210 may have a plurality of conductive holes 230 arranged at intervals, and the output end 134 may be inserted into the conductive hole 230 of the circuit board 210 of the corresponding rectifier filter 200, and the output end 134 may be connected to the circuit board 210 of the corresponding rectifier filter 200. The output end 134 may be electrically connected to the electronic component 220 of the corresponding rectifier filter 200 through the conductive hole 230 of the corresponding rectifier filter 200. The two ends (the first end 1331 and the second end 1332) of the same output end 134 may be arranged in a one-to-one correspondence with the two conductive holes 230.
[0089] For example, see Figure 9-11 The circuit board 210 may include a first surface 211 and a second surface 212 that are opposite and spaced apart in the thickness direction. At least one of the first surface 211 and the second surface 212 may be provided with an electronic component 220. For example, the electronic component 220 may be located only on the first surface 211. Alternatively, the electronic component 220 may be located only on the second surface 212. Alternatively, the electronic component 220 may be located on both the first surface 211 and the second surface 212, thereby facilitating the improvement of the area utilization of the circuit board 210, so as to improve the integration of the rectifier filter 200.
[0090] For example, see Figure 8 , the electronic component 220 may include a rectifying element 223 and a filtering element 224, the rectifying element 223 and the filtering element 224 may be electrically connected, the rectifying element 223 may be used to rectify the current output by the secondary winding 130, and the filtering element 224 may be used to filter the voltage output by the secondary winding 130. For example, the rectifying element 223 may include a metal-oxide-semiconductor field-effect transistor (Metal-Oxide-Semiconductor Field-EffectTransistor, referred to as MOSFET). The filtering element 224 may include a filtering capacitor. In other examples, the electronic component 220 may also include a driving resistor or other electronic components.
[0091] The output terminal group 135 provided in the embodiment of the present application is described below.
[0092] See also Figure 1 , Figure 3 and Figure 8, multiple secondary windings 130 can be arranged along the extension direction of the winding portion 113, and along the circumference of the winding portion 113, the output ends 134 of the multiple secondary windings 130 located on the same side of the circumference of the winding portion 113 can form an output end group 135 together. In the same output end group 135, multiple output ends 134 can be arranged along the extension direction of the winding portion 113. For example, there can be multiple electronic components 220 on the rectifier filter 200, one output end group 135 can be electrically connected to a corresponding rectifier filter 200, and multiple output ends 134 of the same output end group 135 can be electrically connected to multiple electronic components 220 of the corresponding rectifier filter 200 in a one-to-one correspondence. Among them, the number of output end groups 135 and the number of output ends 134 of each secondary winding 130 can be the same. Multiple secondary windings 130 can include at least two output end groups 135, and at least two output end groups 135 can be arranged at intervals along the outer periphery of the winding portion 113. At least two output terminal groups 135 can be electrically connected to at least two rectifier filters 200 in a one-to-one correspondence, and at least two output terminal groups 135 can be correspondingly connected to the circuit boards 210 of at least two rectifier filters 200. Since the multiple output terminals 134 in the output terminal group 135 can be electrically connected to the electronic components 220 of the corresponding rectifier filter 200 through the circuit boards 210 of the corresponding rectifier filters 200, it is not necessary to use a large area of copper bars to achieve the electrical connection between the output terminal group 135 and the electronic components 220, which is conducive to shortening the distance between the output terminal group 135 and the electronic components 220, thereby reducing losses and improving power density and efficiency.
[0093] The following describes that the same secondary winding 130 provided in the embodiment of the present application includes a first secondary winding 131 and a second secondary winding 132 .
[0094] join Figure 5c and Figure 6 , the same secondary winding 130 may include a first secondary winding 131 and a second secondary winding 132 arranged along the extension direction of the winding portion 113. The first secondary winding 131 and the second secondary winding 132 may be isolated by an insulating member. The first secondary winding 131 and the second secondary winding 132 may each include a plurality of conductors 133, the principle of which has been explained and will not be repeated here. The first secondary winding 131 and the second secondary winding 132 may be stacked and arranged with a short distance between them, thereby reducing the coupling inductance in the loop to alleviate the voltage oscillation phenomenon, thereby alleviating the voltage stress on the rectifying element 223. In some embodiments of the present case, in the same secondary winding 130, the distance between the first secondary winding 131 and the second secondary winding 132 may range from 0.05 mm to 0.25 mm.
[0095] See also Fig. 9 and Fig.10In the same rectifier filter 200, the electronic component 220 may include a first electronic component 221 and a second electronic component 222. The first electronic component 221 and the second electronic component 222 may both include a rectifier element 223 and a filter element 224. The first electronic component 221 may be located on at least one of the first surface 211 and the second surface 212, and the second electronic component 222 may be located on at least one of the first surface 211 and the second surface 212. For example, the first electronic component 221 may be located on the first surface 211, and the second electronic component 222 may be located on the second surface 212, so that the electronic component 220 may be distributed on the first surface 211 and the second surface 212 at the same time, which is beneficial to improve the area utilization of the circuit board 210, so as to improve the integration of the rectifier filter 200. In some other embodiments of the present case, the circuit board 210 may also be a multi-layer circuit board, and at least part of the electronic component 220 may also be located on other layers of the circuit board 210, which is not limited to the present case. The first secondary winding 131 may be electrically connected to the first electronic component 221 , and the second secondary winding 132 may be electrically connected to the second electronic component 222 .
[0096] In the embodiment where the first electronic component 221 is located on the first surface 211 and the second electronic component 222 is located on the second surface 212, on the same circuit board 210, the orthographic projection of the first electronic component 221 on the plane where the circuit board 210 is located can at least partially overlap with the orthographic projection of the second electronic component 222 on the plane where the circuit board 210 is located, thereby facilitating the reduction of the total area of the circuit board 210 occupied by the first electronic component 221 and the second electronic component 222, thereby facilitating the reduction of the area of the circuit board 210 and improving the integration of the rectifier filter 200. On the same circuit board 210, the direction from the rectifier element 223 to the filter element 224 of the first electronic component 221 can be the first direction, and the direction from the rectifier element 223 to the filter element 224 of the second electronic component 222 can be the second direction. See Fig. 9 and Fig.10 , the first direction and the second direction may be the same. For example, the orthographic projection of the rectifier element 223 of the first electronic component 221 on the plane where the circuit board 210 is located may at least partially overlap with the orthographic projection of the rectifier element 223 of the second electronic component 222 on the plane where the circuit board 210 is located, and the orthographic projection of the filter element 224 of the first electronic component 221 on the plane where the circuit board 210 is located may at least partially overlap with the orthographic projection of the filter element 224 of the second electronic component 222 on the plane where the circuit board 210 is located, thereby facilitating the improvement of the integration of the rectifier filter 200. Alternatively, see Fig. 9 and Fig.11, the first direction and the second direction may be different. For example, the first direction and the second direction may be opposite. The orthographic projection of the rectifier element 223 of the first electronic component 221 on the plane where the circuit board 210 is located may at least partially overlap with the orthographic projection of the filter element 224 of the second electronic component 222 on the plane where the circuit board 210 is located, and the orthographic projection of the filter element 224 of the first electronic component 221 on the plane where the circuit board 210 is located may at least partially overlap with the orthographic projection of the rectifier element 223 of the second electronic component 222 on the plane where the circuit board 210 is located, thereby facilitating the improvement of the integration of the rectifier filter 200.
[0097] See also Figure 6 and Figure 7 The output end 134 of the first secondary winding 131 may be a first output end 1341, and the output end 134 of the second secondary winding 132 may be a second output end 1342. The output end group 135 may include a first output end group 1351 and a second output end group 1352. The first output ends 1341 of the plurality of first secondary windings 131 located on the same side of the circumference of the winding portion 113 may together form a first output end group 1351. The first output end group 1351 may be connected to the first electronic component 221 ( Fig. 9 ), that is, the plurality of first output terminals 1341 in the first output terminal group 1351 can be electrically connected to the plurality of first electronic components 221 one by one. The plurality of first electronic components 221 corresponding to the first output terminal group 1351 can be arranged on the first surface 211 along the extension direction of the winding portion 113. In addition, the second output terminals 1342 of the plurality of second secondary windings 132 located on the same side of the circumference of the winding portion 113 can jointly form a second output terminal group 1352. The second output terminal group 1352 can be electrically connected to the second electronic component 222 ( Fig.10 ), that is, the plurality of second output ends 1342 in the second output end group 1352 can be electrically connected to the plurality of second electronic components 222 in a one-to-one correspondence. The plurality of second electronic components 222 corresponding to the second output end group 1352 can be arranged on the second surface 212 along the extension direction of the winding portion 113.
[0098] Among them, by providing the first secondary winding 131 and the second secondary winding 132 in the same secondary winding 130, a pull-through rectification scheme can be formed. When the input AC signal is in the positive half cycle, the current can be transmitted to the loop formed by the first secondary winding 131 and the first electronic component 221, and the direction of the current in the first secondary winding 131 is the first current direction. When the input AC signal is in the negative half cycle, the current can be transmitted to the loop formed by the second secondary winding 132 and the second electronic component 222, and the direction of the current in the second secondary winding 132 is the second current direction. The first current direction and the second current direction can be opposite.
[0099] Of course, the first secondary winding 131 and the second secondary winding 132 may not be provided in the same secondary winding 130, so that a full-bridge rectification scheme can be formed. When the input AC signal is in the negative half cycle or the positive half cycle, the current can be transmitted to the loop formed by the secondary winding 130 and the electronic component 220.
[0100] In the embodiment where the output terminal 134 is inserted into the conductive hole 230, see Figure 6 , Fig. 9 and Fig.10 The conductive hole 230 may include a first conductive hole 231 and a second conductive hole 232, and the first conductive hole 231 and the second conductive hole 232 may be arranged at intervals along the extension direction of the winding portion 113. The first output end 1341 may be inserted into the first conductive hole 231, and the two ends of the first output end 1341 may correspond to the two first conductive holes 231 one by one. The first output end 1341 may be electrically connected to the first electronic component 221 located on the first surface 211 through the first conductive hole 231. The second output end 1342 may be inserted into the second conductive hole 232, and the two ends of the second output end 1342 may correspond to the two second conductive holes 232 one by one. The second output end 1342 may be electrically connected to the second electronic component 222 located on the second surface 212 through the second conductive hole 232.
[0101] It should be noted here that the numerical values and numerical ranges involved in the embodiments of the present application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.
[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A transformer, characterized in that: include: A magnetic member, at least one primary winding and at least one secondary winding, wherein the magnetic member includes a winding portion, and the at least one primary winding and the at least one secondary winding are both arranged on at least a portion of the periphery of the winding portion; Each of the secondary windings includes a plurality of conductors arranged along the circumference of the winding portion, wherein each of the conductors includes two ends located on opposite sides, and the two adjacent ends between two adjacent conductors are located on the same side and together form an output end, and each of the secondary windings includes at least two output ends.
2. The transformer according to claim 1, characterized in that: Each of the secondary windings includes a first secondary winding and a second secondary winding arranged along an extending direction of the winding portion.
3. The transformer according to claim 1 or 2, characterized in that: It also includes a winding frame, which has a receiving hole, the winding part is inserted into the receiving hole, and the primary winding and the secondary winding are both arranged on at least a part of the periphery of the winding frame.
4. The transformer according to claim 3, characterized in that: The magnetic member comprises a first magnetic member and a second magnetic member, wherein the first magnetic member and the second magnetic member each comprise the winding portion and the covering portion connected to each other, wherein the covering portion covers at least a portion of the outer side of the winding portion; The winding portion of the first magnetic component is inserted into one end of the accommodating hole, and the winding portion of the second magnetic component is inserted into the other end of the accommodating hole. The covering portion of the first magnetic component and the covering portion of the second magnetic component are both covered on part of the outside of the primary winding and the secondary winding.
5. The transformer according to claim 1 or 2, characterized in that: The number of the primary winding and the number of the secondary winding are both plural, and the primary winding and the secondary winding are alternately arranged along the extending direction of the winding portion.
6. The transformer according to claim 2, characterized in that: In the same secondary winding, the first secondary winding and the second secondary winding are isolated by an insulating member, and a distance between the first secondary winding and the second secondary winding is in a range of 0.05 mm to 0.25 mm.
7. The transformer according to claim 3, characterized in that: The winding frame is provided with a clamping structure, and the secondary winding is arranged on the clamping structure to be fixed on the winding frame.
8. The transformer according to claim 3, characterized in that: The secondary winding and the winding frame are integrally formed.
9. A synchronous rectification component, characterized in that: include: At least two rectifier filters and the transformer according to any one of claims 1 to 8, wherein the at least two rectifier filters are electrically connected to at least two output terminals of the transformer respectively.
10. The synchronous rectification component according to claim 9, characterized in that: Each of the rectifier filters includes a circuit board and electronic components. The multiple secondary windings of the transformer are arranged along the extension direction of the winding portion of the transformer. Along the circumference of the winding portion, the output ends of the multiple secondary windings located on the same side together form an output end group. The multiple secondary windings include at least two output end groups. At least two output end groups are arranged at intervals along the outer circumference of the winding portion. At least two output end groups are correspondingly connected to the circuit boards of at least two of the rectifier filters.
11. The synchronous rectification component according to claim 10, characterized in that: The circuit board includes a first surface and a second surface that are opposite to each other in a thickness direction, and the electronic component is disposed on at least one of the first surface and the second surface.
12. The synchronous rectification component according to claim 11, characterized in that: Each of the secondary windings includes a first secondary winding and a second secondary winding arranged along the extension direction of the winding portion. In the same rectifier filter, the electronic component includes a first electronic component and a second electronic component, the first electronic component is located on the first surface, and the second electronic component is located on the second surface; The output end group includes a first output end group and a second output end group. The output ends of the multiple first secondary windings located on the same side together form the first output end group and are electrically connected to the first electronic component. The output ends of the multiple second secondary windings located on the same side together form the second output end group and are electrically connected to the second electronic component.
13. The synchronous rectification component according to claim 12, characterized in that: On the same circuit board, an orthographic projection of the first electronic component on the plane where the circuit board is located at least partially overlaps with an orthographic projection of the second electronic component on the plane where the circuit board is located.
14. The synchronous rectification component according to claim 12, characterized in that: The electronic component includes a rectifying element and a filtering element which are electrically connected; On the same circuit board, the direction from the rectifying element to the filtering element of the first electronic component is a first direction, and the direction from the rectifying element to the filtering element of the second electronic component is a second direction. The first direction and the second direction are the same, or the first direction and the second direction are different.
15. The synchronous rectification component according to any one of claims 10 to 14, characterized in that: The circuit board has a plurality of conductive holes arranged at intervals, and the output end is inserted into the corresponding conductive hole of the circuit board and is electrically connected to the corresponding electronic component through the conductive hole.