Integrated induction transformer and non-isolated PFC boost-BUCK circuit

Abstract

The utility model relates to the technical field of inductors, and provides an integrated induction transformer and a non-isolated PFC boost-BUCK circuit, the integrated induction transformer comprises a frame body, a magnetic strip, a first magnetic core and a second magnetic core, the frame body comprises a hollow skeleton and a mounting rack sleeved in the middle of the skeleton, the outer surface of the framework is divided into a first winding area and a second winding area by the mounting frame, a first coil and a second coil are wound on the first winding area and the second winding area respectively, the magnetic strip is arranged on the mounting frame, and the first magnetic core and the second magnetic core are mounted on the framework and located on the two sides of the mounting frame respectively. The first magnetic core and the second magnetic core respectively form a magnetic loop with the magnetic strip; according to the utility model, the PFC inductor and the BUCK inductor are combined and designed, so that the circuit has the characteristics of miniaturization and convenience in installation.

Description

Technical Field

[0001] The utility model relates to the technical field of inductance, and in particular to an integrated inductance transformer. Background Art

[0002] In a non-isolated PFC boost-BUCK circuit, a PFC inductor and a BUCK inductor are generally used. In traditional electromagnetic devices, the PFC inductor and the BUCK inductor are independently provided. As a result, in a non-isolated PFC boost-BUCK circuit, the circuit board adopts a form in which the PFC inductor and the BUCK inductor are separated and independent, which occupies a large space, is not conducive to miniaturization, has complex wiring, and is relatively costly. Utility Model Content

[0003] The problem solved by the utility model is how to provide an integrated inductor transformer which is integrated, occupies a small space and is convenient for wiring.

[0004] In order to solve the above problems, the utility model provides an integrated inductor transformer, including: a frame, a magnetic strip, a first magnetic core and a second magnetic core, the frame including a hollow skeleton and a mounting frame sleeved on the middle of the skeleton, the outer surface of the skeleton is divided into a first winding area and a second winding area by the mounting frame, the first winding area and the second winding area are respectively wound with a first coil and a second coil, the magnetic strip is arranged on the mounting frame, the first magnetic core and the second magnetic core are installed on the skeleton, respectively located on both sides of the mounting frame, and the first magnetic core and the second magnetic core respectively form a magnetic circuit with the magnetic strip.

[0005] Furthermore, there are two magnetic strips in the shape of long strips, and the two magnetic strips are respectively installed on the left and right sides of the mounting frame.

[0006] Furthermore, when the first magnetic core and the second magnetic core are installed on both sides of the skeleton, the two sides of the first magnetic core are respectively connected to one side of the two magnetic strips, and the two sides of the second magnetic core are respectively connected to the other opposite side of the two magnetic strips.

[0007] Furthermore, the first magnetic core and the second magnetic core are E-type magnetic cores with the same structure, and the E-type magnetic core includes a horizontal bar, a middle column and two side columns. When the E-type magnetic core is installed on the skeleton, the middle column is inserted into the hollow interior of the skeleton, and the two side columns are respectively located on the front and rear sides of the outer shell of the skeleton, and are respectively connected to the two magnetic strips.

[0008] Furthermore, the frame body also includes two groups of support frames, and the two groups of support frames are respectively arranged at the left and right ends of the skeleton.

[0009] Furthermore, the support frame is also provided with a wiring component for wiring.

[0010] Furthermore, the wiring component includes a wiring terminal and a metal probe, the wiring terminal is used to connect the first coil and the second coil, and the metal probe is connected to the wiring terminal for external circuit connection.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] Since the first winding area and the second winding area are respectively wound with the first coil and the second coil, and the first magnetic core and the second magnetic core share a magnetic strip, after installation, the first magnetic core and the magnetic strip form a closed-loop magnetic circuit in the first winding area, and the second magnetic core and the magnetic strip form a closed-loop magnetic circuit in the second winding area, so that the PFC inductor and the BUCK inductor are integrated into one. Such an integrated design makes the circuit using the integrated inductor transformer occupy less space, easier to install and wire, and at the same time reduces the inductor magnetic strips, which is lower in cost.

[0013] The utility model also provides a non-isolated PFC boost-BUCK circuit, comprising an integrated inductor transformer as described in any one of the above items.

[0014] Therefore, since the non-isolated PFC boost-BUCK circuit includes an integrated inductor transformer, the non-isolated PFC boost-BUCK circuit at least has all the technical effects of the integrated inductor transformer, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall principle structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the principle structure of the frame and magnetic strip of the embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of the principle structure of the E-type magnetic core of an embodiment of the utility model.

[0018] Description of reference numerals:

[0019] 1-frame; 2-magnetic strip; 3-first magnetic core; 4-second magnetic core; 5-wiring component; 6-cross bar; 7-middle column; 8-side column; 11-skeleton; 12-mounting frame; 13-support frame. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0023] like Figure 1 As shown, the utility model provides an integrated inductor transformer, including: a frame 1, a magnetic strip 2, a first magnetic core 3 and a second magnetic core 4, the frame 1 includes a hollow skeleton 11 and a mounting frame 12 sleeved on the middle of the skeleton 11, the outer surface of the skeleton 11 is divided into a first winding area and a second winding area by the mounting frame 12, the first winding area and the second winding area are respectively wound with a first coil and a second coil, the magnetic strip 2 is arranged on the mounting frame 12, the first magnetic core 3 and the second magnetic core 4 are installed on the skeleton 11, and are respectively located on both sides of the mounting frame 12, and the first magnetic core 3 and the second magnetic core 4 respectively form a magnetic circuit with the magnetic strip 2.

[0024] It should be noted that the non-isolated PFC boost-BUCK circuit first performs PFC boost on the power supply and then performs voltage reduction and regulation. It can effectively improve the power factor and ensure the stability of the output voltage. It is widely used in power supply circuits. Inductor energy storage is required in both PFC boost and BUCK step-down. The PFC inductor and BUCK inductor adopt an integrated design, which is more conducive to the miniaturization of the circuit.

[0025] In the present embodiment, since the first winding area and the second winding area are respectively wound with the first coil and the second coil, the first magnetic core 3 and the second magnetic core 4 share the magnetic strip 2. After installation, the first magnetic core 3 and the magnetic strip 2 form a closed-loop magnetic circuit in the first winding area, and the second magnetic core 4 and the magnetic strip 2 form a closed-loop magnetic circuit in the second winding area, so that the PFC inductor and the BUCK inductor are integrated into one. Such an integrated design makes the circuit using the integrated inductor transformer occupy less space, easier to install and wire, and at the same time reduces the inductor magnetic strip 2, which is lower in cost.

[0026] In one embodiment of the present invention, Figure 2 As shown, the magnetic strips 2 are two long strips, and the two magnetic strips 2 are respectively installed on the left and right sides of the mounting frame 12. Figure 1 As shown, when the first magnetic core 3 and the second magnetic core 4 are installed on both sides of the skeleton 11, the two sides of the first magnetic core 3 are respectively connected to one side of the two magnetic strips 2, and the two sides of the second magnetic core 4 are respectively connected to the other opposite side of the two magnetic strips 2.

[0027] It should be noted that the first magnetic core 3 and the second magnetic core 4 are respectively connected to the two opposite sides of the magnetic strip 2, so as to realize the shared magnetic strip 2, so that the first magnetic core 3 and the second magnetic core 4 respectively form a closed-loop magnetic circuit with the magnetic strip 2, so that the PFC inductor and the BUCK inductor are integrated into one.

[0028] In one embodiment of the present invention, Figure 3 As shown, the first magnetic core 3 and the second magnetic core 4 are E-type magnetic cores with the same structure, and the E-type magnetic core includes a horizontal bar 6, a middle column 7 and two side columns 8. When the E-type magnetic core is installed on the skeleton 11, the middle column 7 is inserted into the hollow interior of the skeleton 11, and the two side columns 8 are respectively located on the front and rear sides of the outer shell of the skeleton 11, and are respectively connected to the two magnetic strips 2.

[0029] It should be noted that the first magnetic core 3 and the second magnetic core 4 are E-type magnetic core designs with the same structure. When installed on the skeleton 11, the overall inductor transformer core is EE-shaped, wherein the first magnetic core 3 and the magnetic strip 2 form an EI-type closed-loop magnetic circuit in the first winding area, and the second magnetic core 4 and the magnetic strip 2 form an EI-type closed-loop magnetic circuit in the second winding area.

[0030] In an embodiment of the present invention, the frame body 1 further includes two groups of support frames 13 , and the two groups of support frames 13 are respectively arranged at the left and right ends of the frame 11 .

[0031] It should be noted that the support frame 13 plays a supporting role. Figure 2As shown, the bracket includes a frame and a bottom plate located at the end of the skeleton 11. When the E-type magnetic core is placed, the frames on both sides guide and limit the side columns 8. The horizontal bar 6 is placed on the bottom plate, the middle column 7 is located in the skeleton 11, and the end of the side column 8 is placed at the bottom of the mounting frame 12; optionally, an insulating shell covering the two magnetic strips 2 and the magnetic core can be added to protect and fasten the two magnetic strips 2 and the magnetic core.

[0032] In one embodiment of the utility model, a wiring component 5 for wiring is also provided on the support frame 13, and the wiring component 5 includes a wiring terminal and a metal probe. The wiring terminal is used to connect the first coil and the second coil, and the metal probe is connected to the wiring terminal for external circuit.

[0033] It should be noted that the connection terminals located at the left and right ends of the skeleton 11 are respectively connected to the first coil and the second coil. The metal probe is used for hole mounting and welding when installed on the PCB board, and is used to connect the PFC inductor and the BUCK inductor to the circuit when connected to the circuit board.

[0034] Another embodiment of the present invention provides a non-isolated PFC boost-BUCK circuit, comprising the integrated inductor transformer as described in any one of the above items.

[0035] It should be noted that, in the non-isolated PFC boost-BUCK circuit, the PFC inductor and the BUCK inductor are integrated into one design, which occupies less space, is easier to install and wire, has lower costs, and has good benefits.

[0036] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. An integrated inductor transformer, characterized in that: include: A frame (1), a magnetic strip (2), a first magnetic core (3) and a second magnetic core (4), wherein the frame (1) comprises a hollow frame (11) and a mounting frame (12) sleeved on the middle of the frame (11); the outer surface of the frame (11) is divided into a first winding area and a second winding area by the mounting frame (12); the first winding area and the second winding area are respectively wound with a first coil and a second coil; the magnetic strip (2) is arranged on the mounting frame (12); the first magnetic core (3) and the second magnetic core (4) are mounted on the frame (11) and are respectively located on two sides of the mounting frame (12); the first magnetic core (3) and the second magnetic core (4) respectively form a magnetic circuit with the magnetic strip (2).

2. The integrated inductor transformer according to claim 1, characterized in that: There are two magnetic strips (2) in the shape of long strips, and the two magnetic strips (2) are respectively installed on the left and right sides of the installation frame (12).

3. The integrated inductor transformer according to claim 2, characterized in that: When the first magnetic core (3) and the second magnetic core (4) are mounted on both sides of the frame (11), the two sides of the first magnetic core (3) are respectively connected to one side of the two magnetic strips (2), and the two sides of the second magnetic core (4) are respectively connected to the other side opposite to the two magnetic strips (2).

4. The integrated inductor transformer according to claim 3, characterized in that: The first magnetic core (3) and the second magnetic core (4) are E-type magnetic cores with the same structure. The E-type magnetic core comprises a horizontal bar (6), a middle column (7) and two side columns (8). When the E-type magnetic core is installed on the frame (11), the middle column (7) is inserted into the hollow interior of the frame (11), and the two side columns (8) are respectively located on the front and rear sides of the outer shell of the frame (11) and are respectively connected to the two magnetic strips (2).

5. The integrated inductor transformer according to claim 1, characterized in that: The frame body (1) further comprises two groups of support frames (13), and the two groups of support frames (13) are respectively arranged at the left and right ends of the frame (11).

6. The integrated inductor transformer according to claim 5, characterized in that: The support frame (13) is also provided with a wiring component (5) for wiring.

7. The integrated inductor transformer according to claim 6, characterized in that: The wiring component (5) comprises a wiring terminal and a metal probe, wherein the wiring terminal is used to connect the first coil and the second coil, and the metal probe is connected to the wiring terminal for external connection.

8. A non-isolated PFC boost-BUCK circuit, characterized in that: Comprising the integrated inductor transformer as claimed in any one of claims 1 to 7.

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