A coupled inductor and power supply

Abstract

The utility model discloses a kind of coupled inductance and power supply, belong to power electronics technical field, including N-phase main winding and N-phase auxiliary winding, N-phase main winding is arranged in parallel, and each phase auxiliary winding is arranged around the magnetic circuit of corresponding phase main winding, and the auxiliary winding of main winding with coupling relationship is connected at both ends.The utility model of a kind of coupled inductance and power supply, without changing main winding structure and overall size, main winding is coupled together by auxiliary winding, improve the coupling relationship between main winding, can reduce winding loss, and the coupling relationship can be adjusted;In addition, it is suitable for vertical power supply structure, can significantly reduce the height of power supply.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to a coupled inductor and a power supply. Background Technology

[0002] In the field of power electronics, with the continuous development of microprocessor technology, its operating voltage is showing a continuous decreasing trend, while the operating current is significantly increasing, and the requirements for dynamic response speed are becoming increasingly stringent. In low-voltage, high-current application scenarios, the DC loss of the inductor and the loss of the power delivery network (PDN) dominate the total system losses of the voltage regulation module that powers the microprocessor.

[0003] Currently, to effectively reduce the aforementioned losses, a growing trend in the industry is towards adopting Vertical Power Delivery (VPD) architectures. VPD architectures, by optimizing power transmission paths, can alleviate the problems of excessive DC losses in inductors and power distribution network losses to some extent. However, existing VPD architectures still suffer from significant losses in the design and application of coupled inductors; furthermore, the existing coupled inductors are relatively tall, failing to effectively reduce the power supply height. Utility Model Content

[0004] The present invention aims to provide a coupled inductor and power supply to further improve system performance and efficiency, while reducing the height of the power supply to meet the growing demand for power electronics applications.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A coupled inductor includes an N-phase main winding and an N-phase auxiliary winding. The N-phase main windings are arranged in parallel, and each phase auxiliary winding is arranged around the magnetic circuit of the corresponding phase main winding. The two ends of the auxiliary windings corresponding to the main windings that have a coupling relationship are connected.

[0007] Furthermore, the aforementioned coupled inductor also includes one or more first windings, with one end of the auxiliary winding corresponding to the main winding having a coupling relationship connected through the first winding.

[0008] Furthermore, the coupling relationship between the main windings is related to the number of turns of the auxiliary windings.

[0009] Furthermore, the coupling relationship between the main windings is related to the connection distance between the auxiliary windings.

[0010] Furthermore, the coupling relationship between the main windings is related to the number of turns of the first winding.

[0011] This utility model also provides a power supply, including the aforementioned coupled inductor, and further including N first magnetic cores, with each of the N-phase main windings passing through one of the first magnetic cores.

[0012] Furthermore, the power supply of this utility model also includes a printed circuit board, in which the first magnetic core is embedded and the N-phase main winding is disposed through the printed circuit board.

[0013] This utility model also provides a power supply, including the aforementioned coupled inductor, and further including a third magnetic core, with the N-phase main winding passing through the third magnetic core.

[0014] This utility model also provides a coupled inductor, including a first phase main winding and a second phase main winding, wherein the second phase main winding is arranged in a magnetic circuit surrounding the first phase main winding.

[0015] This utility model also provides a power supply, including the aforementioned coupled inductor, and further including a fourth magnetic core, wherein the first phase main winding is disposed through the fourth magnetic core, and the second phase main winding is disposed around the fourth magnetic core.

[0016] Furthermore, the power supply of this utility model also includes a printed circuit board, in which the fourth magnetic core and the second phase main winding are embedded, and the first phase main winding is disposed through the printed circuit board.

[0017] Beneficial effects: This utility model provides a coupled inductor and power supply with a vertical structure, suitable for vertical power supply structures. It can reduce winding length and winding losses, thereby significantly reducing the height of the power supply. Without changing the main winding structure and overall size, the main windings are coupled together through auxiliary windings, improving the coupling relationship between the main windings, reducing winding losses, and this coupling relationship can be adjusted. Furthermore, the main windings can be magnetically integrated, improving the coupling relationship between the main windings, reducing winding losses, and this coupling relationship can also be adjusted.

[0018] To make the above-mentioned features and advantages of the utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a first specific embodiment of the coupling inductor and power supply of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of a second specific embodiment of the coupling inductor and power supply of this utility model.

[0021] Figure 3 This is a structural schematic diagram of a third specific embodiment of the coupling inductor and power supply of this utility model.

[0022] Figure 4 This is a schematic diagram of the fourth specific embodiment of the coupling inductor and power supply of this utility model.

[0023] Figure 5 This is a circuit diagram of a first specific embodiment of a power supply according to the present invention.

[0024] Figure 6 This is a circuit diagram of a second specific embodiment of a power supply according to the present invention.

[0025] Figure 7 This is a circuit diagram of a third specific embodiment of a power supply according to the present invention. Detailed Implementation

[0026] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] Figure 1 This is a schematic diagram of the structure of a first specific embodiment of the coupled inductor and power supply of this utility model. Figure 1 As shown, the coupled inductor 11 includes a two-phase main winding and a two-phase auxiliary winding, specifically including a first-phase main winding 111, a second-phase main winding 112, a first-phase auxiliary winding 113, and a second-phase auxiliary winding 114. The first-phase main winding 111 and the second-phase main winding 112 are arranged in parallel. The first-phase auxiliary winding 113 is arranged around the magnetic circuit of the first-phase main winding 111, and the second-phase auxiliary winding 114 is arranged around the magnetic circuit of the second-phase main winding 112. The first end of the first-phase auxiliary winding 113 is connected to the first end of the second-phase auxiliary winding 114, and the second end of the first-phase auxiliary winding 113 is connected to the second end of the second-phase auxiliary winding 114.

[0028] More specifically, the first phase main winding 111 and the second phase main winding 112 are coupled together by the first phase auxiliary winding 113 and the second phase auxiliary winding 114.

[0029] Furthermore, the direction of current inflow or outflow is the same at the first end of the first phase auxiliary winding 113 and the second end of the second phase auxiliary winding 114, and the direction of current inflow or outflow is the same at the second end of the first phase auxiliary winding 113 and the first end of the second phase auxiliary winding 114.

[0030] More specifically, in one embodiment, the first end of the first phase auxiliary winding 113 is in the direction of current inflow, the second end of the first phase auxiliary winding 113 is in the direction of current outflow, the first end of the second phase auxiliary winding 114 is in the direction of current outflow, and the second end of the second phase auxiliary winding 114 is in the direction of current inflow. In another embodiment, the first end of the first phase auxiliary winding 113 is in the direction of current outflow, the second end of the first phase auxiliary winding 113 is in the direction of current inflow, the first end of the second phase auxiliary winding 114 is in the direction of current inflow, and the second end of the second phase auxiliary winding 114 is in the direction of current outflow.

[0031] Furthermore, the number of turns, shape, length, and width of the first phase auxiliary winding 113 and the second phase auxiliary winding 114 are not limited and can be adjusted according to the needs of the coupling relationship.

[0032] Furthermore, the coupling relationship between the main windings is related to the number of turns of the auxiliary windings.

[0033] Optionally, adjusting the number of turns of the first phase auxiliary winding 113 and the second phase auxiliary winding 114 can change the coupling relationship between the auxiliary winding and the main winding, thereby adjusting the coupling relationship between the main windings.

[0034] Furthermore, the coupling relationship between the main windings is related to the connection distance between the auxiliary windings.

[0035] Optionally, adjusting the connection distance between the first end of the first phase auxiliary winding 113 and the first end of the second phase auxiliary winding 114, and the connection distance between the second end of the first phase auxiliary winding 113 and the second end of the second phase auxiliary winding 114, can change the coupling relationship between the auxiliary windings and the main windings, thereby adjusting the coupling relationship between the main windings.

[0036] Optionally, the shapes of the first phase auxiliary winding 113 and the second phase auxiliary winding 114 can be rectangles, squares, rings, etc., and this application is not limited thereto.

[0037] Optionally, the length and width of the first phase auxiliary winding 113 and the second phase auxiliary winding 114 may be the same or different, and this application is not limited thereto.

[0038] This specific embodiment also provides a power supply, including a coupled inductor 11, a first magnetic core 121 and a second magnetic core 122, wherein the first phase main winding 111 is disposed through the first magnetic core 121, and the second phase main winding 112 is disposed through the second magnetic core 122.

[0039] Optionally, the first magnetic core 121 and the second magnetic core 122 can be in the shape of a ring or the like, and this application is not limited thereto.

[0040] Optionally, adjusting the material and shape of the first magnetic core 121 and the second magnetic core 122 can adjust the coupling relationship between the main windings.

[0041] Furthermore, the power supply also includes a printed circuit board (PCB) 13, in which the first magnetic core 121 and the second magnetic core 122 are embedded, and the first phase main winding 111 and the second phase main winding 112 are disposed through the printed circuit board 13.

[0042] For example, Figure 1 The coupled inductor in the middle can be used Figure 5 The power supply topology in [the system]. Specifically, Figure 5 The power supply includes switches Q1, Q2, Q3, and Q4, inductors L1, L2, L11, and L12, and capacitor C1. Switches Q1 and Q3 are connected in series with the input voltage V. in In parallel, switches Q2 and Q4 are connected in series and then connected to the input voltage V. in In parallel, the midpoint of the series connection between switches Q1 and Q3 is connected to the first terminal of capacitor C1 via inductor L1. The second terminal of capacitor C1 is connected to the midpoint of the connection between switches Q3 and Q4. The midpoint of the series connection between switches Q2 and Q4 is connected to the first terminal of capacitor C1 via inductor L2. The first terminal of inductor L11 is connected to the leakage inductance L... k Connect the first terminal of inductor L12, and connect the second terminal of inductor L12 to the second terminal of inductor L11. Inductor L11 is coupled to inductor L1, and inductor L12 is coupled to inductor L2. Inductor L1 corresponds to... Figure 1 The first phase main winding 111, inductor L2 corresponds to Figure 1 The second phase main winding 112, inductor L11 corresponds to Figure 1 The first phase auxiliary winding 113, inductor L12 corresponds to Figure 1 The second phase main winding 114.

[0043] In this specific embodiment, without changing the main winding structure and overall size, the main windings are coupled together by an auxiliary winding, which improves the coupling relationship between the main windings and this coupling relationship can be adjusted. In addition, the coupling inductor of this specific embodiment runs through the printed circuit board from top to bottom and has a vertical structure, which is suitable for vertical power supply structures and can significantly reduce the height of the power supply.

[0044] It should be noted that the above embodiments are illustrated using a two-phase example. By increasing the number of main windings and auxiliary windings accordingly, the number of phases can be extended to N phases. This application is not limited to this.

[0045] Figure 2 This is a schematic diagram of the structure of a second specific embodiment of the coupling inductor and power supply of this utility model. Figure 2 The structure of the intermediate coupling inductor 21 and Figure 1 The structure of the intermediate coupling inductor 11 is the same, so it will not be described again here.

[0046] Figure 2 The power supply includes a third magnetic core 221, through which the first phase main winding 211 and the second phase main winding 212 are disposed.

[0047] Optionally, adjusting the material and shape of the third magnetic core 221 can adjust the coupling relationship between the main windings.

[0048] In this specific embodiment, the coupled inductor runs through the magnetic core from top to bottom, has a vertical structure, is suitable for vertical power supply structures, and can significantly reduce the height of the power supply.

[0049] It should be noted that the above embodiments are illustrated using a two-phase example. By increasing the number of main windings and auxiliary windings accordingly, the number of phases can be extended to N phases. This application is not limited to this.

[0050] Figure 3 This is a schematic diagram of a third specific embodiment of the coupled inductor and power supply of this utility model. Figure 3 As shown, the coupled inductor 31 includes a two-phase main winding and a two-phase auxiliary winding, specifically including a first-phase main winding 311, a second-phase main winding 312, a first-phase auxiliary winding 313, a second-phase auxiliary winding 314, and a first winding 315. The first-phase main winding 311 and the second-phase main winding 312 are arranged in parallel. The first-phase auxiliary winding 313 is arranged around the magnetic circuit of the first-phase main winding 311, and the second-phase auxiliary winding 314 is arranged around the magnetic circuit of the second-phase main winding 312. The first end of the first-phase auxiliary winding 313 is connected to the first end of the second-phase auxiliary winding 314 through the first winding 315, and the second end of the first-phase auxiliary winding 313 is connected to the second end of the second-phase auxiliary winding 314.

[0051] More specifically, the first phase main winding 311 and the second phase main winding 312 are coupled together by the first phase auxiliary winding 313 and the second phase auxiliary winding 314.

[0052] Furthermore, the direction of current inflow or outflow is the same at the first end of the first phase auxiliary winding 313 and the second end of the second phase auxiliary winding 314, and the direction of current inflow or outflow is the same at the second end of the first phase auxiliary winding 313 and the first end of the second phase auxiliary winding 314.

[0053] More specifically, in one embodiment, the first end of the first phase auxiliary winding 313 is in the direction of current inflow, the second end of the first phase auxiliary winding 313 is in the direction of current outflow, the first end of the second phase auxiliary winding 314 is in the direction of current outflow, and the second end of the second phase auxiliary winding 314 is in the direction of current inflow. In another embodiment, the first end of the first phase auxiliary winding 313 is in the direction of current outflow, the second end of the first phase auxiliary winding 313 is in the direction of current inflow, the first end of the second phase auxiliary winding 314 is in the direction of current inflow, and the second end of the second phase auxiliary winding 314 is in the direction of current outflow.

[0054] Furthermore, the number of turns, shape, length, and width of the first phase auxiliary winding 313, the second phase auxiliary winding 314, and the first winding 315 are not limited and can be adjusted according to the needs of the coupling relationship.

[0055] Furthermore, the coupling relationship between the main windings is related to the number of turns of the auxiliary winding, and the coupling relationship between the main windings is related to the number of turns of the first winding.

[0056] Optionally, adjusting the number of turns of the first phase auxiliary winding 313, the second phase auxiliary winding 314, and the first winding 315 can change the coupling relationship between the auxiliary windings and the main windings, thereby adjusting the coupling relationship between the main windings.

[0057] Furthermore, the coupling relationship between the main windings is related to the connection distance between the auxiliary windings.

[0058] Optionally, the connection distance between the first end of the first phase auxiliary winding 313 and the first end of the second phase auxiliary winding 314, and the connection distance between the second end of the first phase auxiliary winding 313 and the second end of the second phase auxiliary winding 314, can change the coupling relationship between the auxiliary winding and the main winding, thereby adjusting the coupling relationship between the main windings.

[0059] Optionally, the shapes of the first phase auxiliary winding 313, the second phase auxiliary winding 314, and the first winding 315 can be rectangles, squares, rings, etc., and this application is not limited thereto.

[0060] Optionally, the length and width of the first phase auxiliary winding 313, the second phase auxiliary winding 314, and the first winding 315 may be the same or different, and this application is not limited thereto.

[0061] This specific embodiment also provides a power supply, including a coupled inductor 31, a first magnetic core 321 and a second magnetic core 322, wherein the first phase main winding 311 is disposed through the first magnetic core 321, and the second phase main winding 312 is disposed through the second magnetic core 322.

[0062] Optionally, the first magnetic core 321 and the second magnetic core 322 can be in the shape of a ring or the like, and this application is not limited thereto.

[0063] Optionally, adjusting the material and shape of the first magnetic core 321 and the second magnetic core 322 can adjust the coupling relationship between the main windings.

[0064] Furthermore, the power supply also includes a printed circuit board (PCB) 33, in which the first magnetic core 321 and the second magnetic core 322 are embedded, and the first phase main winding 311 and the second phase main winding 312 are disposed through the printed circuit board 33.

[0065] For example, Figure 3 The coupled inductor in the middle can be used Figure 6 The power supply topology in [the system]. Specifically, Figure 6 The power supply includes switches Q1, Q2, Q3, and Q4, inductors L1, L2, L11, and L12, capacitor C1, and inductor L... s1 Switches Q1 and Q3 are connected in series and then connected to the input voltage V. in In parallel, switches Q2 and Q4 are connected in series and then connected to the input voltage V. in In parallel, the midpoint of the series connection between switches Q1 and Q3 is connected to the first terminal of capacitor C1 via inductor L1. The second terminal of capacitor C1 is connected to the midpoint of the connection between switches Q3 and Q4. The midpoint of the series connection between switches Q2 and Q4 is connected to the first terminal of capacitor C1 via inductor L2. The first terminal of inductor L11 is connected to the leakage inductance L... k With inductor L s1 Connect the first terminal of inductor L12, and connect the second terminal of inductor L12 to the second terminal of inductor L11. Inductor L11 is coupled to inductor L1, and inductor L12 is coupled to inductor L2. Inductor L1 corresponds to... Figure 3 The first phase main winding 311, inductor L2 corresponds to Figure 3 The second phase main winding 312, inductor L11 corresponds to Figure 3 The first phase auxiliary winding 313, inductor L12 corresponds to Figure 3 The second phase auxiliary winding 314, inductor L s1 correspond Figure 3 The first winding is 315.

[0066] Optionally, the first winding 315 can be disposed within the printed circuit board 33 or outside the printed circuit board 33. When the first winding 315 is disposed outside the printed circuit board 33, adjusting the number of turns, shape, length and width of the first winding can more conveniently adjust the coupling relationship between the main windings without having to change the internal structure of the printed circuit board.

[0067] Alternatively, you may refer to Figure 2 In a specific embodiment, the printed circuit board 33 is replaced with an entire magnetic core. The first phase main winding 311 and the second phase main winding 312 are arranged through this magnetic core. The first winding 315 can be arranged inside this magnetic core or outside the magnetic core, using an external magnetic core.

[0068] It should be noted that the above embodiments are illustrated using a two-phase example. By increasing the number of main windings and auxiliary windings accordingly, the number of phases can be extended to N phases. This application is not limited to this.

[0069] Optionally, it can be Figures 1 to 3 The second phase main winding is arranged around the magnetic circuit of the first phase main winding, which can also realize the function of adjusting the coupling relationship between the main windings.

[0070] Figure 4 This is a schematic diagram of the fourth specific embodiment of the coupled inductor and power supply of this utility model. Figure 4 As shown, the coupled inductor 41 includes a first phase main winding 411 and a second phase main winding 412, with the second phase main winding 412 arranged around the magnetic circuit of the first phase main winding 411.

[0071] More specifically, the current in the first phase main winding 411 generates a magnetic circuit from top to bottom, and the second phase main winding 412 is arranged around the magnetic circuit of the first phase main winding 411, thereby enabling coupling between the main windings.

[0072] Optionally, such as Figure 4 As shown, the second phase main winding 412 can be helical.

[0073] Optionally, the number of turns, shape, length and width of the second phase main winding 412 are not limited and can be adjusted according to the needs of the coupling relationship.

[0074] Optionally, adjusting the number of turns, shape, length and width of the second phase main winding 412 can adjust the coupling relationship between the main windings.

[0075] This specific embodiment also provides a power supply, including a coupled inductor 41 and a fourth magnetic core 42, wherein a first phase main winding 411 is disposed through the fourth magnetic core 42, and a second phase main winding 412 is disposed around the fourth magnetic core 42.

[0076] Optionally, the fourth magnetic core 42 can be in the shape of a ring or the like, but this application is not limited thereto.

[0077] Optionally, adjusting the material and shape of the fourth magnetic core 42 can adjust the coupling relationship between the main windings.

[0078] Furthermore, the power supply also includes a printed circuit board (PCB) 43, in which the fourth magnetic core 42 and the second phase main winding 412 are embedded, and the first phase main winding 411 is disposed through the printed circuit board 43.

[0079] Alternatively, you may refer to Figure 2 In a specific embodiment, the printed circuit board 43 is replaced with a whole magnetic core, the first phase main winding 411 is arranged through this magnetic core, and the second phase main winding 412 is arranged around the magnetic circuit of the first phase main winding 411.

[0080] For example, Figure 4 The coupled inductor in the middle can be used Figure 7 The power supply topology in [the system]. Specifically, Figure 7 The power supply includes switch Q5, switch Q6, diode D1, inductor L3, inductor L4, capacitors C2 and C3. Switches Q5 and Q6 are connected in series with the input voltage V. in In parallel, the midpoint of the series connection between switches Q5 and Q6 passes through inductor L3 and is connected to the first terminal of capacitor C2. The second terminal of capacitor C2 is connected to switch Q6 and the input voltage V. in The connection point is as follows: the first terminal of inductor L4 is connected to the anode of diode D1, and the cathode of diode D1 is connected to the second terminal of inductor L4 via capacitor C3. Inductor L3 is coupled to inductor L4. Inductor L3 corresponds to... Figure 4 The first phase main winding 411, inductor L4 corresponds to Figure 4 The second phase main winding 412.

[0081] In this specific embodiment, the main windings are magnetically integrated, which improves the coupling relationship between the main windings, reduces winding losses, and the coupling relationship can be adjusted. In addition, the coupling inductor in this specific embodiment runs through the magnetic core or printed circuit board from top to bottom, has a vertical structure, is suitable for vertical power supply structures, can significantly reduce the height of the power supply, and does not increase the volume of the power supply.

[0082] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A coupled inductor, characterized in that, It includes an N-phase main winding and an N-phase auxiliary winding. The N-phase main windings are arranged in parallel, and each phase auxiliary winding is arranged around the magnetic circuit of the corresponding phase main winding. The two ends of the auxiliary winding corresponding to the main winding with coupling relationship are connected.

2. The coupled inductor as described in claim 1, characterized in that, It also includes one or more first windings, and one end of the auxiliary winding corresponding to the main winding with coupling relationship is connected through the first winding.

3. The coupled inductor as described in claim 1, characterized in that, The coupling relationship between the main windings is related to the number of turns of the auxiliary windings.

4. The coupled inductor as described in claim 1, characterized in that, The coupling relationship between the main windings is related to the connection distance between the auxiliary windings.

5. A coupled inductor as described in claim 2, characterized in that, The coupling relationship between the main windings is related to the number of turns of the first winding.

6. A power supply, characterized in that, The system includes a coupled inductor as described in any one of claims 1-5, and further includes N first magnetic cores, with each of the N-phase main windings passing through one of the first magnetic cores.

7. The power supply as described in claim 6, characterized in that, It also includes a printed circuit board, in which the first magnetic core is embedded and the N-phase main winding is disposed through the printed circuit board.

8. A power supply, characterized in that, The system includes a coupled inductor as described in any one of claims 1-5, and further includes a third magnetic core through which the N-phase main winding is disposed.

9. A coupled inductor, characterized in that, It includes a first-phase main winding and a second-phase main winding, with the second-phase main winding arranged around the magnetic circuit of the first-phase main winding.

10. A power supply, characterized in that, The system includes a coupled inductor as described in claim 9, and further includes a fourth magnetic core, wherein the first phase main winding passes through the fourth magnetic core and the second phase main winding surrounds the fourth magnetic core.

11. The power supply as described in claim 10, characterized in that, It also includes a printed circuit board, in which the fourth magnetic core and the second phase main winding are embedded, and the first phase main winding is disposed through the printed circuit board.

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