Transformer and inductor integrated devices, switching power supplies and power supply equipment
By integrating the transformer and inductor together and optimizing the magnetic field direction, the problem of large area occupied by inductors and transformers is solved, achieving high power density and low loss in the switching power supply.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2025-03-24
- Publication Date
- 2026-05-26
Smart Images
Figure CN224287972U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of power electronics technology, and in particular to transformer and inductor integrated devices, switching power supplies and power supply equipment. Background Technology
[0002] A switching power supply is a type of power supply that uses modern power electronics technology to control the on-time ratio of switching transistors to maintain a stable output voltage. A switching power supply includes an inductor and a transformer.
[0003] In related technologies, inductors and transformers occupy a large area of printed circuit boards (PCBs), which is not conducive to improving the power density of switching power supplies. Furthermore, the large number of pins in inductors and transformers also increases the board area and current transmission losses. Utility Model Content
[0004] This disclosure provides an integrated transformer and inductor device, a switching power supply, and a power supply device. The integrated transformer and inductor device is small in size and has a small number of pins. The technical solutions for the integrated transformer and inductor device, the switching power supply, and the power supply device are described below.
[0005] In a first aspect, this disclosure provides an integrated transformer and inductor device. The integrated transformer and inductor device includes a magnetic core, a first conductor, and a second conductor. The magnetic core includes a base plate, a top plate, an inductor center post, a first side post, and a first transformer center post. One end of each of the inductor center post, the first side post, and the first transformer center post is connected to the base plate, and the other end is connected to the top plate. The first side posts are arranged between the inductor center post and the first transformer center post. A portion of the first conductor is wound around the inductor center post to form an inductor winding, and another portion of the first conductor is wound around the first transformer center post to form a first primary winding of the first transformer. The two ends of the first conductor form a first pin and a second pin, respectively. The second conductor is wound around the first transformer center post to form a first secondary winding of the first transformer. The two ends of the second conductor form a third pin and a fourth pin, respectively.
[0006] The technical solution provided in this disclosure integrates the transformer and inductor by winding the inductor winding and the first transformer winding (i.e., the first primary winding and the first secondary winding) on different columns of the same magnetic core, thereby reducing the volume and board area occupied by the transformer and inductor. Furthermore, in the integrated transformer and inductor device provided in this disclosure, a portion of the first conductor is wound around the inductor column to form the inductor winding, and a portion of the first conductor is wound around the first transformer column to form the first primary winding. That is, the first conductor is continuously wound on the inductor column and the first transformer column without interruption. Thus, the inductor winding and the first primary winding of this disclosure together include two pins: the first pin and the second pin at both ends of the first conductor. Compared to discrete inductors and transformers where the inductor winding and the first primary winding each have two pins, the integrated device provided in this disclosure reduces the number of pins by at least two.
[0007] In one implementation, the magnetic core further includes a second side post, one end of which is connected to the base plate and the other end to the top plate, and the central post of the first transformer is arranged between the first and second side posts. This helps to reduce the leakage flux of the first transformer.
[0008] In one implementation, the magnetic core further includes a second transformer center column, one end of which is connected to a base plate and the other end to a top plate. A first transformer center column is positioned between the second transformer center column and the first side column. A portion of the first conductor is also wound around the second transformer center column to form the second primary winding of the second transformer, and the second transformer center column is also wound with the second secondary winding of the second transformer. The integrated device integrates two transformers and one inductor.
[0009] The technical solution provided in this disclosure, by setting a portion of the first conductor to be wound around the middle column of the second transformer to form a second primary winding, allows the first conductor to be continuously wound on the middle column of the inductor, the middle column of the first transformer, and the middle column of the second transformer in a non-breaking manner. This reduces the number of pins in the integrated transformer and inductor device. In the separate transformer and inductor, the inductor winding includes two pins, the first primary winding includes two pins, and the second primary winding includes two pins. However, in the integrated device provided in this disclosure, the inductor winding, the first primary winding, and the second primary winding together include two pins, namely the first pin and the second pin at both ends of the first conductor, reducing the number of pins by at least four.
[0010] In one implementation, the transformer and inductor integrated device further includes a third conductor wound around the middle column of the second transformer to form a second secondary winding. The two ends of the third conductor form a fifth pin and a sixth pin, respectively. Thus, since the first and second secondary windings are formed by two independent conductors, the first and second transformers can be used in parallel or in series.
[0011] In one implementation, a portion of the second conductor is wound around the center column of the first transformer to form a first secondary winding, and another portion of the second conductor is wound around the center column of the second transformer to form a second secondary winding. That is, the second conductor is continuously wound on the center columns of both the first and second transformers without interruption. This further reduces the number of pins in the integrated transformer and inductor device. In the separate transformers, the first secondary winding includes two pins, and the second secondary winding includes two pins. However, in the integrated device provided in this disclosure, the first and second secondary windings together include only two pins, namely the third and fourth pins at both ends of the second conductor, reducing the number of pins by at least two.
[0012] In one implementation, the direction of the magnetic field generated by the inductor winding on the first terminal is opposite to the direction of the magnetic field generated by the first primary winding on the first terminal. This allows the magnetic flux generated by the first primary winding on the first terminal to cancel each other out, resulting in a smaller magnetic flux on the first terminal and reducing the likelihood of magnetic saturation. This reduces the cross-sectional area of the first terminal, thereby further reducing the size and board area of the integrated transformer and inductor.
[0013] Secondly, this disclosure provides another integrated transformer and inductor device. The integrated transformer and inductor device includes a magnetic core, a first conductor, and a second conductor. The magnetic core includes a base plate, a top plate, an inductor center post, a first side post, a first transformer center post, and a second transformer center post. One end of each of the inductor center post, the first side post, the first transformer center post, and the second transformer center post is connected to the base plate, and the other end is connected to the top plate. The inductor center post, the first side post, the first transformer center post, and the second transformer center post are arranged sequentially. The first conductor is wound around the inductor center post to form an inductor winding, wherein the two ends of the first conductor form a first pin and a second pin, respectively. A portion of the second conductor is wound around the first transformer center post to form a first primary winding of the first transformer, and a portion of the second conductor is wound around the second transformer center post to form a second primary winding of the second transformer, wherein the two ends of the second conductor form a third pin and a fourth pin, respectively. The first transformer center post also has a first secondary winding of the first transformer wound around it, and the second transformer center post also has a second secondary winding of the second transformer wound around it.
[0014] The technical solution provided in this disclosure integrates two transformers and inductors by winding the inductor winding, the first transformer winding (i.e., the first primary winding and the first secondary winding), and the second transformer winding (i.e., the second primary winding and the second secondary winding) onto different columns of the same magnetic core, thereby reducing the volume and board area occupied by the transformers and inductors. Furthermore, in the integrated transformer and inductor device provided in this disclosure, a portion of the second conductor is wound around the first transformer column to form the first primary winding, and a portion of the second conductor is wound around the second transformer column to form the second primary winding. That is, the second conductor is continuously wound on the first and second transformer columns without interruption. Thus, the first and second primary windings together include two pins: the third and fourth pins at both ends of the second conductor. Compared to the four pins in two separate primary windings of two transformers, the integrated transformer and inductor device provided in this disclosure reduces the number of pins by at least two.
[0015] In one implementation, the transformer and inductor integrated device further includes a third conductor and a fourth conductor. The third conductor is wound around the center column of the first transformer to form a first secondary winding, wherein the two ends of the third conductor form a fifth pin and a sixth pin, respectively. The fourth conductor is wound around the center column of the second transformer to form a second secondary winding, wherein the two ends of the fourth conductor form a seventh pin and an eighth pin, respectively. Thus, the first and second secondary windings are formed by two independent conductors, allowing the first and second transformers to be used in parallel or in series.
[0016] In one implementation, the transformer and inductor integrated device further includes a third conductor. A portion of the third conductor is wound around the center column of the first transformer to form a first secondary winding, and a portion of the third conductor is wound around the center column of the second transformer to form a second secondary winding. The two ends of the third conductor form a fifth pin and a sixth pin, respectively. That is, the third conductor is continuously wound on the center columns of the first and second transformers without interruption. This further reduces the number of pins in the transformer and inductor integrated device. In the separate transformers, the first secondary winding includes two pins, and the second secondary winding includes two pins. However, in the integrated device provided in this disclosure, the first and second secondary windings together include only two pins, namely the fifth and sixth pins at both ends of the third conductor, reducing the number of pins by at least two.
[0017] In one implementation, the magnetic core further includes a second side post, one end of which is connected to the base plate and the other end to the top plate. The first transformer's central post and the second transformer's central post are arranged between the first and second side posts. This helps reduce the leakage flux of the first and second transformers.
[0018] In one implementation, the direction of the magnetic field generated by the inductor winding at the first terminal is opposite to the direction of the magnetic field generated by the first primary winding at the first terminal. This allows the magnetic flux generated by the first primary winding at the first terminal to cancel each other out, resulting in a smaller magnetic flux at the first terminal and reducing the likelihood of magnetic saturation. This reduces the cross-sectional area of the first terminal, thereby further reducing the size of the transformer and inductor integrated devices and improving the power density of the switching power supply.
[0019] Thirdly, this disclosure provides a switching power supply. The switching power supply includes an inverter circuit, a rectifier circuit, and an integrated transformer and inductor device as described in either the first or second aspect. The integrated transformer and inductor device is connected between the inverter circuit and the rectifier circuit. By employing the integrated transformer and inductor device described in either the first or second aspect, it is advantageous to increase the power density of the switching power supply.
[0020] Fourthly, this disclosure provides a power supply device. The power supply device includes a plurality of switching power supplies as described in the third aspect, the plurality of switching power supplies being connected in parallel. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of a switching power supply provided in an embodiment of this disclosure;
[0022] Figure 2 This is a schematic diagram illustrating an application scenario of a communication power supply provided in an embodiment of this disclosure;
[0023] Figure 3 This is a schematic diagram of a first type of transformer and inductor integrated device provided in an embodiment of this disclosure;
[0024] Figure 4 This is a schematic diagram of a second type of transformer and inductor integrated device provided in an embodiment of this disclosure;
[0025] Figure 5 This is a schematic diagram of a third type of transformer and inductor integrated device provided in the embodiments of this disclosure;
[0026] Figure 6 This is provided by the embodiments of this disclosure. Figures 3-5 The schematic diagram of the integrated transformer and inductor device is shown.
[0027] Figure 7 This is a schematic diagram of the first type of switching power supply provided in the embodiments of this disclosure;
[0028] Figure 8 This is a schematic diagram of the magnetic field of an integrated transformer and inductor device provided in an embodiment of this disclosure;
[0029] Figure 9 This is a schematic diagram of a fourth type of transformer and inductor integrated device provided in the embodiments of this disclosure;
[0030] Figure 10 This is provided by the embodiments of this disclosure. Figure 9 The schematic diagram of the integrated transformer and inductor device is shown.
[0031] Figure 11 This is a schematic diagram of a second type of switching power supply provided in an embodiment of this disclosure;
[0032] Figure 12 This is a schematic diagram of a third type of switching power supply provided in an embodiment of this disclosure;
[0033] Figure 13 This is a schematic diagram of the fifth type of transformer and inductor integrated device provided in the embodiments of this disclosure;
[0034] Figure 14 This is provided by the embodiments of this disclosure. Figure 13 The schematic diagram of the integrated transformer and inductor device is shown.
[0035] Figure 15 This is a schematic diagram of the fourth type of switching power supply provided in the embodiments of this disclosure;
[0036] Figure 16 This is a schematic diagram of the fifth type of transformer and inductor integrated device provided in the embodiments of this disclosure;
[0037] Figure 17 This is provided by the embodiments of this disclosure. Figure 16 The schematic diagram of the integrated transformer and inductor device is shown.
[0038] Figure 18 This is a schematic diagram of the fifth type of switching power supply provided in the embodiments of this disclosure;
[0039] Figure 19 This is a schematic diagram of the sixth type of switching power supply provided in the embodiments of this disclosure;
[0040] Figure 20 This is a schematic diagram of the sixth type of transformer and inductor integrated device provided in the embodiments of this disclosure;
[0041] Figure 21 This is provided by the embodiments of this disclosure. Figure 20 The schematic diagram of the integrated transformer and inductor device is shown.
[0042] Figure 22 This is a schematic diagram of the seventh type of switching power supply provided in the embodiments of this disclosure;
[0043] Figure 23 This is a schematic diagram of a power supply device provided in an embodiment of this disclosure.
[0044] Legend
[0045] 001. Power supply equipment;
[0046] 01. Switching power supply;
[0047] 10. Inverter circuit; 20. Rectifier circuit; 30. Inductor; 40. Transformer; 50. Transformer and inductor integrated device.
[0048] 1. Magnetic core; 11. Base plate; 12. Top plate; 13. Inductor center column; 14. First side column; 15. First transformer center column; 16. Second side column; 17. Second transformer center column;
[0049] 2. First wire, 201, first pin, 202, second pin;
[0050] 3. Second wire, 301, third pin, 302, fourth pin;
[0051] 4. Third wire, 401, fifth pin, 402, sixth pin;
[0052] 5. Fourth wire, 501. Seventh pin, 502. Eighth pin;
[0053] 100, Inductor winding; 200, First primary winding; 300, First secondary winding; 400, Second primary winding; 500, Second secondary winding. Detailed Implementation
[0054] A switching power supply is a type of power supply that uses modern power electronics technology to control the on-time ratio of switching transistors to maintain a stable output voltage. Switching power supplies are widely used in various scenarios, such as communication base stations, photovoltaic systems, charging stations, and data centers. Specifically, the switching power supply provided in this disclosure can be a rectifier, inverter, charging module, communication power supply, etc.
[0055] Figure 1 A schematic diagram of the basic architecture of a switching power supply 01 is shown, as follows. Figure 1 As shown, the switching power supply 01 includes at least an inverter circuit 10, a rectifier circuit 20, an inductor 30, and a transformer 40. One pin of the inductor 30 is connected to the inverter circuit 10, and the other pin of the inductor 30 is connected to one pin of the primary winding of the transformer 40. The other pin of the primary winding is also connected to the inverter circuit 10. The two pins of the secondary winding of the transformer 40 are connected to the rectifier circuit 20.
[0056] The inverter circuit 10 converts the input DC power into a high-frequency AC square wave. The inductor 30 and transformer 40 convert the high-frequency AC square wave into AC voltage. The rectifier circuit 20 converts the AC voltage into a DC output voltage and supplies it to the load. Specifically, the inductor 30 receives the high-frequency AC square wave and performs periodic charging and discharging. When the inductor 30 discharges, it transfers electrical energy to the transformer 40, which then transforms the electrical energy and transmits it to the rectifier circuit 20.
[0057] It should be noted that, Figure 1 The diagram shown is only the basic architecture of the switching power supply 01. Figure 1 The switching power supply 01 shown has DC input and output. In practical applications, to diversify the input and output current forms of the switching power supply 01, corresponding circuits can be set in the switching power supply 01 to convert the current form.
[0058] For example, in Figure 1 If another rectifier circuit is set at the input terminal of the inverter circuit 10, the rectifier circuit is used to receive AC power and convert the AC power into DC power for output to the inverter circuit 10. In this way, the switching power supply 01 achieves an input of AC power and an output of DC power. For example, in... Figure 1 Another inverter circuit is set at the output terminal of the rectifier circuit 20. The inverter circuit is used to convert the DC power output by the rectifier circuit 20 into AC power and output the AC power to the load. In this way, the switching power supply 01 has DC power as input and AC power as output. For another example, combining the above two technical solutions, in... Figure 1 Another rectifier circuit is set at the input terminal of the inverter circuit 10. Figure 1 By setting an inverter circuit at the output of the rectifier circuit 20, the input of the switching power supply is AC and the output is AC.
[0059] The following section uses a switching power supply as an example to illustrate the specific applications of switching power supplies in communication. Figure 2 As shown, in the case where the switching power supply 01 is a communication power supply, a rectifier circuit 20 is also provided at the input terminal of the inverter circuit 10. This rectifier circuit 20 is used to connect to the mains power (AC) and convert the AC power into DC power for output to the inverter circuit 10. After the inverter circuit 10, inductor 30, transformer 40 and rectifier circuit 20 process the electrical energy in the manner described above, the power is output by the rectifier circuit 20 to supply power to the communication base station.
[0060] In related technologies, the inductor 30 and transformer 40 of the switching power supply are designed separately, which makes the inductor 30 and transformer 40 larger in size and occupies a larger area of printed circuit board (PCB), which is not conducive to improving the power density of the switching power supply.
[0061] Furthermore, the inductor 30 and transformer 40 have a relatively large number of pins in total. Specifically, inductor 30 has two pins, and the primary winding of transformer 40 has two pins, while the secondary winding has two pins, resulting in a total of six pins for inductor 30 and transformer 40. Additionally, some switching power supplies include two transformers 40, in which case the inductor 30 and the two transformers 40 together have ten pins.
[0062] Because the bobbins (or cores) of inductors 30 and transformers 40 require sufficient space for lead-out pins, the more pins in inductors 30 and transformers 40 include, the larger their overall size becomes. Furthermore, since the pins need to connect to the PCB, a larger number of pins results in a more complex PCB routing network, further increasing the board area occupied by inductors 30 and transformers 40. Moreover, the pins need to be led out from the bobbins, increasing the wire length and leading to additional losses. Additionally, the pins need to be soldered to connect to the PCB, forming cylindrical conductors several millimeters long, resulting in severe skin effect, significant localized losses, and substantial current transfer losses within the PCB. Therefore, an excessive number of pins also increases current transmission losses.
[0063] In summary, how to reduce the size of inductor 30 and transformer 40, and how to reduce the number of pins included in inductor 30 and transformer 40, is a key technical issue.
[0064] In view of the above-mentioned technical problems, this disclosure provides a transformer and inductor integrated device 50, which integrates an inductor and a transformer together, reduces the board area, reduces the number of pins, and is beneficial to improving the power density of the switching power supply and reducing losses.
[0065] The transformer and inductor integrated device 50 provided in the embodiments of this disclosure will now be described by way of example. Figure 3 and Figure 4 A schematic diagram of a transformer and inductor integrated device 50 is shown. In some examples, such as Figure 3As shown, the transformer and inductor integrated device 50 includes a magnetic core 1, an inductor winding 100, a first primary winding 200, and a first secondary winding 300. The magnetic core 1 includes a base plate 11, a top plate 12, an inductor center post 13, a first side post 14, and a first transformer center post 15. One end of the inductor center post 13, the first side post 14, and the first transformer center post 15 is connected to the base plate 11, and the other end is connected to the top plate 12. The first side post 14 is arranged between the inductor center post 13 and the first transformer center post 15. The inductor winding 100 is wound on the inductor center post 13. The first primary winding 200 and the first secondary winding 300 are wound on the first transformer center post 15, wherein the first primary winding 200 and the first secondary winding 300 form a first transformer or a first transformer winding.
[0066] The technical solution provided in this disclosure integrates the transformer and inductor by winding the inductor winding 100 and the first transformer winding on different central posts of the same magnetic core 1, thereby reducing the board area occupied by the transformer and inductor. Furthermore, in the technical solution provided in this disclosure, the first transformer and inductor share the first side post 14, or in other words, the first transformer and inductor are integrated together through the first side post 14. This reduces the number of magnetic posts included in the integrated transformer and inductor device 50, resulting in a smaller size of the integrated transformer and inductor device 50 compared to discrete transformers and inductors, thus reducing the PCB board area occupied.
[0067] In some examples, such as Figure 4 and Figure 5 As shown in the embodiments of this disclosure, the magnetic core 1 in the transformer and inductor integrated device 50 may further include a second side post 16. One end of the second side post 16 is connected to the base plate 11, and the other end is connected to the top plate 12. The first transformer central post 15 is arranged between the first side post 14 and the second side post 16. The arrangement of the second side post 16 helps to reduce the leakage flux of the first transformer.
[0068] The implementation of the inductor winding 100, the first primary winding 200, and the first secondary winding 300 will be illustrated below.
[0069] In some examples, such as Figures 3-5As shown, the transformer and inductor integrated device 50 includes a first conductor 2. A portion of the first conductor 2 is wound around the inductor post 13 to form an inductor winding 100, and another portion of the first conductor 2 is wound around the first transformer post 15 to form a first primary winding 200. That is, the first conductor 2 is continuously wound on the inductor post 13 and the first transformer post 15 without interruption. Thus, the inductor winding 100 and the first primary winding 200 together include two pins, namely the first pin 201 and the second pin 202 at both ends of the first conductor 2. Compared to the discrete inductor and transformer where the inductor winding 100 includes two pins, the first primary winding 200 includes two pins, thus reducing the number of pins in the transformer and inductor integrated device 50 provided in this embodiment by at least two.
[0070] In some examples, such as Figures 3-5 As shown, the transformer and inductor integrated device 50 includes a second conductor 3, which is wound around the central column 15 of the first transformer to form a first secondary winding 300.
[0071] Furthermore, this disclosure does not limit the positions of the first primary winding 200 and the first secondary winding 300 on the column 15 of the first transformer. In some examples, such as Figure 3 and Figure 4 As shown, one of the first primary winding 200 and the first secondary winding 300 is located in the inner layer, and the other is located in the outer layer. For example, the first primary winding 200 is in the inner layer, and the first secondary winding 300 is in the outer layer. This makes the transformer windings more compact, which helps to reduce the size of the transformer and inductor integrated device 50. Figure 3 and Figure 4 The different line widths of the first primary winding 200 and the first secondary winding 300 are only to distinguish that the first primary winding 200 and the first secondary winding 300 are located at different levels, and do not mean that the actual line widths of the first primary winding 200 and the first secondary winding 300 are different. In other examples, such as Figure 5 As shown, the first primary winding 200 and the first secondary winding 300 are arranged along the axial direction of the central column 15 of the first transformer.
[0072] Figure 6 It shows Figures 3-5 The schematic diagram of the transformer and inductor integrated device 50. Figure 7 It shows including Figures 3-5 A schematic diagram of a switching power supply for a transformer and inductor integrated device 50 is shown. In some examples, such as... Figure 7As shown, the switching power supply 01 includes an inverter circuit 10, a rectifier circuit 20, and an integrated transformer and inductor device 50. The first pin 201 and the second pin 202 of the first wire 2 are connected to the inverter circuit 10. The third pin 301 and the fourth pin 302 of the second wire 3 are connected to the rectifier circuit 20.
[0073] Understandably, since the first transformer and inductor share the first post 14 in the transformer-inductor integrated device 50, both the first transformer and the inductor will generate a magnetic field at the first post 14. In some examples, the magnetic fields generated by the inductor winding 100 and the first primary winding 200 at the first post 14 are in the same direction. Thus, the magnetic flux generated by the inductor winding 100 at the first post 14 is superimposed on the magnetic flux generated by the first primary winding 200 at the first post 14, resulting in a larger magnetic flux density at the first post 14. In this case, it is necessary to increase the cross-sectional area of the first post 14 to reduce the magnetic flux density at the first post 14, avoid magnetic saturation, and reduce core losses.
[0074] In other examples, such as Figure 8 As shown, the direction of the magnetic field generated by the first primary winding 200 at the first post 14 is opposite to the direction of the magnetic field generated by the inductor winding 100 at the first post 14. Wherein, Figure 8 In the diagram, the arrows on the windings indicate the direction of current. The solid arrows on the magnetic pillars indicate the direction of the magnetic field generated by the first primary winding 200, and the dashed arrows on the magnetic pillars indicate the direction of the magnetic field generated by the inductor winding 100. From... Figure 8 As can be seen, the magnetic flux generated by the first primary winding 200 at the first post 14 cancels out the magnetic flux generated by the inductor winding 100 at the first post 14, resulting in a smaller magnetic flux at the first post 14. Therefore, even without increasing the cross-sectional area of the first post 14 (or even decreasing it), magnetic saturation will not occur, thus further reducing the size of the transformer and inductor integrated device 50.
[0075] In some examples, such as Figure 8 As shown, the cross-sectional area of the first side post 14 is smaller than that of the second side post 16. In related technologies, the cross-sectional areas of the side posts on both sides of the transformer central post of an independent transformer are generally the same. Therefore, compared to the technical solutions in related technologies, the technical solution provided in this disclosure embodiment is equivalent to reducing the cross-sectional area of the first side post 14, further reducing the volume of the transformer and inductor integrated device 50.
[0076] In some examples, such as Figure 8 As shown, along the arrangement direction of the second side post 16, the first transformer center post 15, the first side post 14 and the inductor center post 13, the width of the first side post 14 is smaller than the width of the second side post 16.
[0077] In some examples, such as Figure 8 As shown, the cross-sectional area of the first side post 14 is smaller than the cross-sectional area of the inductor's central post 13. In related technologies, the cross-sectional areas of the central post and one side post of an independent inductor are generally the same. Therefore, compared to the technical solutions in related technologies, the technical solution provided in this disclosure reduces the cross-sectional area of the first side post 14, further reducing the volume of the transformer and inductor integrated device 50.
[0078] In some examples, such as Figure 8 As shown, along the arrangement direction of the second side post 16, the first transformer center post 15, the first side post 14 and the inductor center post 13, the width of the first side post 14 is smaller than the width of the inductor center post 13.
[0079] It should be noted that, in addition to integrating the first transformer, the transformer and inductor integrated device 50 can also integrate a second transformer. Accordingly, such as... Figure 9 As shown, the magnetic core 1 also includes a second transformer center column 17, one end of which is connected to the base plate 11 and the other end to the top plate 12. The first transformer center column 15 is arranged between the second transformer center column 17 and the first side column 14. The transformer and inductor integrated device 50 also includes a second primary winding 400 and a second secondary winding 500, which are wound around the second transformer center column 17. The second primary winding 400 and the second secondary winding 500 form the second transformer.
[0080] This disclosure does not limit the implementation of the second primary winding 400. In some examples, the second primary winding 400 is formed by winding an independent wire, which is disconnected from the first wire 2.
[0081] In other examples, such as Figure 9 As shown, a portion of the first conductor 2 is also wound around the second transformer's central column 17 to form the second primary winding 400. That is, the first conductor 2 is continuously wound on the inductor's central column 13, the first transformer's central column 15, and the second transformer's central column 17 in a continuous manner. This reduces the number of pins in the transformer and inductor integrated device 50. In the separate transformer and inductor, the inductor winding includes two pins, the first primary winding includes two pins, and the second primary winding includes two pins. However, in the technical solution provided by this embodiment, the inductor winding 100, the first primary winding 200, and the second primary winding 400 together include two pins (i.e., the first pin 201 and the second pin 202), reducing the number of pins by at least four.
[0082] This disclosure does not limit the implementation of the second secondary winding 500. In some examples, such as Figure 9 As shown, the transformer and inductor integrated device 50 also includes a third conductor 4, which is wound around the middle column 17 of the second transformer to form a second secondary winding 500. The third conductor 4 is disconnected from the second conductor 3. The first and second transformers can be used in parallel or in series.
[0083] Figure 10 It shows Figure 9 The schematic diagram of the transformer and inductor integrated device 50. Figure 11 and Figure 12 Two types are shown, including Figure 9 A schematic diagram of a switching power supply for a transformer and inductor integrated device 50 is shown. In some examples, such as... Figure 11 As shown, the switching power supply includes an inverter circuit 10, two rectifier circuits 20, and an integrated transformer and inductor device 50. The first pin 201 and the second pin 202 of the first wire 2 are connected to the inverter circuit 10. The third pin 301 and the fourth pin 302 of the second wire 3 are connected to one rectifier circuit 20, and the fifth pin 401 and the sixth pin 402 of the third wire 4 are connected to the other rectifier circuit 20. Figure 11 The switching power supply shown can output electrical energy through two rectifier circuits 20.
[0084] In other examples, such as Figure 12 As shown, the switching power supply includes an inverter circuit 10, a rectifier circuit 20, and an inductor integrated device 50. The first pin 201 and the second pin 202 of the first wire 2 are connected to the inverter circuit 10. The third pin 301 of the second wire 3 is connected to the rectifier circuit 20, the fourth pin 302 of the second wire 3 is connected to the fifth pin 401 of the third wire 4, and the sixth pin 402 of the third wire 4 is connected to the rectifier circuit 20. The fourth pin 302 of the second wire 3 and the fifth pin 401 of the third wire 4 can be electrically connected via a PCB or by directly connecting the two wires (e.g., soldering). Figure 12 In this circuit, the first secondary winding 300 and the second secondary winding 500 are connected in series, which can improve the input voltage of the rectifier circuit 20.
[0085] Besides the technical solution of setting an independent third conductor 4 to be wound around the middle column 17 of the second transformer to form the second secondary winding 500, in other examples, such as Figure 13As shown, alternatively, a portion of the second conductor 3 can be wound around the first transformer's central column 15 to form the first secondary winding 300, while another portion can be wound around the second transformer's central column 17 to form the second secondary winding 500. That is, the second conductor 3 is continuously wound on both the first and second transformer central columns 15 and 17 without interruption. Thus, the first secondary winding 300 and the second secondary winding 500 together include two pins: the third pin 301 and the fourth pin 302 at both ends of the second conductor 3. In the two separate transformers, both the first and second secondary windings have two pins.
[0086] Figure 14 It shows Figure 13 The schematic diagram of the transformer and inductor integrated device 50. Figure 15 It shows including Figure 14 A schematic diagram of a switching power supply for a transformer and inductor integrated device 50 is shown. In some examples, such as... Figure 15 As shown, the switching power supply includes an inverter circuit 10, a rectifier circuit 20, and an integrated transformer and inductor device 50. The first pin 201 and the second pin 202 of the first wire 2 are connected to the inverter circuit 10. The third pin 301 and the fourth pin 302 of the second wire 3 are connected to the rectifier circuit 20. Figure 15 The first secondary winding 300 and the second secondary winding 500 are connected in series, which can improve the input voltage of the rectifier circuit 20.
[0087] It should be noted that in the above technical solution, the inductor winding 100 and the first primary winding 200 are formed by the same wire wound around different magnetic pillars. In other examples, the inductor winding 100 and the first primary winding 200 may also be formed by different wires wound around magnetic pillars, and the first primary winding 200 and the second primary winding 400 may be formed by the same wire wound around different magnetic pillars; or, the first secondary winding 300 and the second secondary winding 500 may be formed by the same wire wound around different magnetic pillars, in order to reduce the number of pins. Exemplary examples are provided below.
[0088] In some examples, such as Figure 16 As shown, the first conductor 2 is wound around the inductor post 13 to form the inductor winding 100.
[0089] In some examples, such as Figure 16As shown, a portion of the second conductor 3 is wound around the first transformer's central column 15 to form the first primary winding 200, and another portion of the second conductor 3 is wound around the second transformer's central column 17 to form the second primary winding 400. That is, the second conductor 3 is continuously wound on the first transformer's central column 15 and the second transformer's central column 17 without interruption. Thus, the first primary winding 200 and the second primary winding 400 together include two pins: the third pin 301 and the fourth pin 302 at both ends of the second conductor 3. Compared to two separate transformers, where the first and second primary windings together include four pins, the integrated device provided in this embodiment has at least two fewer pins.
[0090] This disclosure does not limit the implementation of the first secondary winding 300 and the second secondary winding 500. In some examples, such as Figure 16 As shown, the third conductor 4 is wound around the central column 15 of the first transformer to form the first secondary winding 300, and the fourth conductor 5 is wound around the central column 17 of the second transformer to form the second secondary winding 500. In this way, the first transformer and the second transformer can be used in parallel or in series.
[0091] Figure 17 It shows Figure 16 The schematic diagram of the transformer and inductor integrated device 50. Figure 18 and Figure 19 Two types are shown, including Figure 16 A schematic diagram of a switching power supply with an integrated transformer and inductor device 50. In some examples, such as... Figure 18 As shown, the switching power supply includes an inverter circuit 10, two rectifier circuits 20, and an integrated transformer and inductor device 50. The first pin 201 of the first conductor 2 is connected to the inverter circuit 100, the second pin 202 of the first conductor 2 is connected to the third pin 301 of the second conductor 3, and the fourth pin 302 of the second conductor 3 is also connected to the inverter circuit 100. The fifth pin 401 and the sixth pin 402 of the third conductor 4 are connected to one rectifier circuit 20. The seventh pin 501 and the eighth pin 502 of the fourth conductor 5 are connected to another rectifier circuit 20. Figure 18 The switching power supply shown can output power externally through two rectifier circuits 20.
[0092] In other examples, such as Figure 19As shown, the switching power supply includes an inverter circuit 10, a rectifier circuit 20, and an integrated transformer and inductor device 50. The first pin 201 of the first conductor 2 is connected to the inverter circuit 100; the second pin 202 of the first conductor 2 is connected to the third pin 301 of the second conductor 3; and the fourth pin 302 of the second conductor 3 is also connected to the inverter circuit 100. The fifth pin 401 of the third conductor 4 is connected to the rectifier circuit 20; the sixth pin 402 of the third conductor 4 is connected to the seventh pin 501 of the fourth conductor 5; and the eighth pin 502 of the fourth conductor 5 is also connected to the rectifier circuit 20. Figure 19 The first secondary winding 300 and the second secondary winding 500 are connected in series, which can improve the input voltage of the rectifier circuit 20.
[0093] Besides the technical solution where the first secondary winding 300 and the second secondary winding 500 are wound with different wires, in other examples, such as Figure 20 As shown, the transformer and inductor integrated device 50 also includes a third conductor 4. A portion of the third conductor 4 is wound around the first transformer's central column 15 to form a first secondary winding 300, and another portion of the third conductor 4 is wound around the second transformer's central column 17 to form a second secondary winding 500. That is, the third conductor 4 is continuously wound on the first transformer's central column 15 and the second transformer's central column 17 without interruption. Thus, the first secondary winding 300 and the second secondary winding 500 together include two pins, namely the fifth pin 401 and the sixth pin 402 at both ends of the third conductor 4. Compared to two separate transformers, where the first and second secondary windings together include four pins, the technical solution provided in this disclosure embodiment reduces the number of pins by at least two.
[0094] Figure 21 It shows Figure 20 The schematic diagram of the transformer and inductor integrated device 50. Figure 22 It shows including Figure 21 A schematic diagram of a switching power supply for a transformer and inductor integrated device 50 is shown. In some examples, such as... Figure 22 As shown, the switching power supply includes an inverter circuit 10, a rectifier circuit 20, and an integrated transformer and inductor device 50. The first pin 201 of the first conductor 2 is connected to the inverter circuit 100, the second pin 202 of the first conductor 2 is connected to the third pin 301 of the second conductor 3, and the fourth pin 302 of the second conductor 3 is also connected to the inverter circuit 100. The fifth pin 401 and the sixth pin 402 of the third conductor 4 are connected to the rectifier circuit 20. Figure 22 The first secondary winding 300 and the second secondary winding 500 are connected in series, which can improve the input voltage of the rectifier circuit 20.
[0095] It should be noted that the embodiments disclosed herein do not limit the pinout position of the aforementioned pins. For example, Figure 9In this example, the first pin 201 exits from the inductor's terminal 13, and the second pin 202 exits from the second transformer's terminal 17. In other examples, the first pin 201 may also exit from the first transformer's terminal 15 or the second transformer's terminal 17, and the second pin 202 may also exit from the inductor's terminal 13 or the first transformer's terminal 15.
[0096] Furthermore, the present disclosure does not limit the number of winding layers of the inductor winding 100, the first primary winding 200, the first secondary winding 300, the second primary winding 400, and the second secondary winding 500. The accompanying drawings provided in this disclosure illustrate each winding as a single layer, but in practice, two or more layers may also be used.
[0097] It should also be noted that the principle of the switching power supply provided in this disclosure embodiment is the same as that of the switching power supply in the related art. The only difference is that the inductor and transformer are integrated in the switching power supply provided in this disclosure embodiment, while the inductor and transformer are separate in the switching power supply in the related art. Furthermore, the switching power supply provided in this disclosure embodiment can adopt an LLC resonant converter (inductor inductor capacitor resonant converter, LLC) or DAB converter (dual active bridge converter, DAB) architecture. In some examples, the switching power supply provided in this disclosure embodiment is the aforementioned communication power supply.
[0098] This disclosure also provides a power supply device 001. For example... Figure 23 As shown, the power supply equipment 001 includes multiple switching power supplies 01 connected in parallel. Connecting multiple switching power supplies 01 in parallel increases the supply current and enhances the power supply capacity.
[0099] In some examples, such as Figure 23 As shown, taking the switching power supply 01 as a communication power supply as an example, the input terminals of multiple switching power supplies 01 are connected to the mains power, the output terminals are connected to the communication base station, and the multiple switching power supplies 01 are connected in parallel.
[0100] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.
Claims
1. A transformer and inductor integrated device, comprising: The transformer and inductor integrated device (50) includes a magnetic core (1), a first conductor (2), and a second conductor (3); The magnetic core (1) includes a base plate (11), a top plate (12), an inductor center column (13), a first side column (14), and a first transformer center column (15). One end of the inductor center column (13), the first side column (14), and the first transformer center column (15) are connected to the base plate (11), and the other end is connected to the top plate (12). The first side column (14) is arranged between the inductor center column (13) and the first transformer center column (15). A portion of the first conductor (2) is wound around the inductor center post (13) to form an inductor winding (100), and a portion of the first conductor (2) is wound around the first transformer center post (15) to form the first primary winding (200) of the first transformer. The two ends of the first conductor (2) respectively form a first pin (201) and a second pin (202). The second conductor (3) is wound around the middle column (15) of the first transformer and forms the first secondary winding (300) of the first transformer, wherein the two ends of the second conductor (3) form the third pin (301) and the fourth pin (302) respectively.
2. The transformer and inductor integrated device according to claim 1, characterized in that, The magnetic core (1) also includes a second side post (16), one end of which is connected to the bottom plate (11) and the other end is connected to the top plate (12), and the first transformer middle post (15) is arranged between the first side post (14) and the second side post (16).
3. The transformer and inductor integrated device according to claim 1 or 2, characterized in that, The magnetic core (1) also includes a second transformer center column (17), one end of which is connected to the bottom plate (11) and the other end is connected to the top plate (12), and the first transformer center column (15) is arranged between the second transformer center column (17) and the first side column (14); A portion of the first conductor (2) is also wound around the middle column (17) of the second transformer to form the second primary winding (400) of the second transformer, and the middle column (17) of the second transformer is also wound with the second secondary winding (500) of the second transformer.
4. The transformer and inductor integrated device according to claim 3, characterized in that, The transformer and inductor integrated device (50) also includes a third conductor (4), which is wound around the middle column (17) of the second transformer to form the second secondary winding (500), wherein the two ends of the third conductor (4) form a fifth pin (401) and a sixth pin (402) respectively.
5. The transformer and inductor integrated device according to claim 3, characterized in that, A portion of the second conductor (3) is wound around the first transformer center column (15) to form the first secondary winding (300), and a portion of the second conductor (3) is wound around the second transformer center column (17) to form the second secondary winding (500).
6. The transformer and inductor integrated device according to claim 1 or 2, characterized in that, The direction of the magnetic field generated by the inductor winding (100) on the first side post (14) is opposite to the direction of the magnetic field generated by the first primary winding (200) on the first side post (14).
7. An integrated device combining a transformer and an inductor, characterized in that, The transformer and inductor integrated device (50) includes a magnetic core (1), a first conductor (2), and a second conductor (3); The magnetic core (1) includes a base plate (11), a top plate (12), an inductor center column (13), a first side column (14), a first transformer center column (15), and a second transformer center column (17). One end of the inductor center column (13), the first side column (14), the first transformer center column (15), and the second transformer center column (17) are connected to the base plate (11), and the other end is connected to the top plate (12). The inductor center column (13), the first side column (14), the first transformer center column (15), and the second transformer center column (17) are arranged in sequence. The first wire (2) is wound around the inductor post (13) to form an inductor winding (100), wherein the two ends of the first wire (2) form a first pin (201) and a second pin (202) respectively. A portion of the second conductor (3) is wound around the first transformer column (15) to form the first primary winding (200) of the first transformer, and a portion of the second conductor (3) is wound around the second transformer column (17) to form the second primary winding (400) of the second transformer. The two ends of the second conductor (3) form the third pin (301) and the fourth pin (302) respectively. The first transformer's central column (15) is also wound with the first secondary winding (300) of the first transformer, and the second transformer's central column (17) is also wound with the second secondary winding (500) of the second transformer.
8. The transformer and inductor integrated device according to claim 7, characterized in that, The transformer and inductor integrated device (50) also includes a third conductor (4) and a fourth conductor (5); The third conductor (4) is wound around the first transformer column (15) and forms the first secondary winding (300), wherein the two ends of the third conductor (4) form the fifth pin (401) and the sixth pin (402) respectively. The fourth conductor (5) is wound around the middle column (17) of the second transformer and forms the second secondary winding (500), wherein the two ends of the fourth conductor (5) form the seventh pin (501) and the eighth pin (502) respectively.
9. The transformer and inductor integrated device according to claim 7, characterized in that, The transformer and inductor integrated device (50) also includes a third conductor (4); A portion of the third conductor (4) is wound around the first transformer center column (15) to form the first secondary winding (300), and a portion of the third conductor (4) is wound around the second transformer center column (17) to form the second secondary winding (500). The two ends of the third conductor (4) form the fifth pin (401) and the sixth pin (402), respectively.
10. The transformer and inductor integrated device according to any one of claims 7-9, characterized in that, The magnetic core (1) also includes a second side post (16), one end of which is connected to the bottom plate (11) and the other end is connected to the top plate (12), and the first transformer middle post (15) and the second transformer middle post (17) are arranged between the first side post (14) and the second side post (16).
11. The transformer and inductor integrated device according to any one of claims 7-9, characterized in that, The direction of the magnetic field generated by the inductor winding (100) on the first side post (14) is opposite to the direction of the magnetic field generated by the first primary winding (200) on the first side post (14).
12. A switching power supply, characterized in that, The switching power supply includes an inverter circuit (10), a rectifier circuit (20), and a transformer and inductor integrated device (50) as described in any one of claims 1-11. The transformer and inductor integrated device (50) is connected between the inverter circuit (10) and the rectifier circuit (20).
13. A power supply device, characterized in that, The power supply device (001) includes a plurality of switching power supplies (01) as described in claim 12, wherein the plurality of switching power supplies (01) are connected in parallel.