Bidirectional transformer integrated resonant inductor magnetic circuit structure

Abstract

The utility model discloses an integrated resonant inductor magnetic circuit structure of a bidirectional transformer, which belongs to the technical field of magnetic components and comprises a connecting seat body, a first inductance part, a first transformation part, a second inductance part, a second transformation part and an output structure, the connecting seat body is provided with a main body, a first limiting mounting part, a second limiting mounting part and an output limiting structure; a first limiting mounting part and a second limiting mounting part are adjacently arranged on the main body; the output limiting structures are distributed in the main body. The first inductance part is connected with the first voltage transformation part in an attached mode, and the first inductance part and the first voltage transformation part are arranged in the first limiting installation part. The second inductance part is connected with the second voltage transformation part in an attached mode, and the second inductance part and the second voltage transformation part are arranged in the second limiting installation part. And each output structure is correspondingly connected with one output limiting structure. The utility model solves the technical problem of how to integrate a bidirectional transformer and a resonant inductor magnetic circuit structure.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic components, in particular to a bidirectional transformer integrated resonant inductor magnetic circuit structure. Background Art

[0002] With the continuous development of technology industries such as electric vehicles, distributed power supplies, aviation power systems and uninterruptible power supplies (UPS), bidirectional DC / DC converters (BDC) have become a research hotspot in the current power electronics academic and industrial circles. These applications require BDC to achieve a wide range of voltage regulation functions within a wide load range, while having as high a power density and as low an electromagnetic interference as possible on the basis of high-efficiency operation.

[0003] Generally speaking, BDC can be divided into isolated and non-isolated types. On the one hand, isolated BDC can reduce its volume and weight through high-frequency transformers, thereby improving the flexibility of application and control; on the other hand, since BDC is usually used to connect two DC buses, electrical isolation can improve its stability and safety. Therefore, compared with non-isolated BDC, isolated BDC is easier to meet the technical requirements of industrial applications.

[0004] In isolated BDC, LLC resonant DC / DC converter has been widely studied due to its soft switching characteristics. However, when it is reverse running, the excitation inductor is clamped by the input voltage, and the resonant cavity becomes a series resonant circuit composed of resonant inductor and capacitor. Therefore, LLC resonant converter has basically no boost characteristics when working in reverse; moreover, its soft switching advantage may be lost when running in reverse. In order to overcome this shortcoming, some scholars have proposed CLLC resonant converter. CLLC structure is developed on the basis of LLC structure. By adding resonant capacitor to the secondary side of transformer, on the one hand, bidirectional DC isolation can be achieved to avoid the problem of transformer bias saturation due to asymmetric voltage square wave; on the other hand, compared with LLC circuit, the secondary side capacitor participates in the resonance process as an important factor that cannot be ignored, which can make the circuit have reverse boost and buck capability, which helps to simplify the design in wide range output applications.

[0005] The bidirectional CLLC resonant converter uses fully controlled power devices on both the primary and secondary sides, such as MOSFET. During forward and reverse operation, the current will flow through the parasitic diode of the MOS tube during the secondary rectification, resulting in considerable losses. Therefore, synchronous rectification technology is usually used, that is, the MOS tube is turned on when the anti-parallel diode of the MOS tube is turned on, which will greatly reduce the conduction loss of the MOS tube on the secondary side of the CLLC.

[0006] Existing synchronous rectification solutions can be roughly divided into hardware and software solutions. The hardware solution mainly uses synchronous rectification chips and requires the addition of voltage or current detection circuits, which increases the system cost on the one hand, and on the other hand, it is difficult to implement DCDC bidirectional switching applications due to the use of fixed hardware assistance; the software solution mainly includes traditional FHA model control or table lookup method, etc. The FHA model has a large error when it deviates from the resonance point, so it cannot guide the accurate rectifier switching action. The table lookup method is to fit a large amount of experimentally measured data to obtain an approximate rectifier switching time, but since CLLC operation often has multiple modes, it is difficult to summarize the operation of the full load range by the table lookup method.

[0007] Based on this, Chinese patent CN112583279B discloses a control method and system suitable for a bidirectional isolated DCDC converter, wherein a control system suitable for a bidirectional isolated DCDC converter includes a front-stage BOOST / BUCK module, a bidirectional isolated CLLC module and a control unit, wherein an external power supply is electrically connected to the bidirectional isolated CLLC module, the bidirectional isolated CLLC module is electrically connected to the front-stage BOOST / BUCK module, and the front-stage BOOST / BUCK module is electrically connected to an external energy storage battery; the control unit is used to control the front-stage BOOST / BUCK module and the bidirectional isolated CLLC module to use the electric energy stored in the external energy storage battery to power the external load when the external power supply is powered off, or to control the front-stage BOOST / BUCK module and the bidirectional isolated CLLC module to use the external power supply to charge the external energy storage battery when the external power supply is powered on. This control method has the advantages of input and output electrical isolation, and can quickly power the external load when the external power supply is powered off.

[0008] However, in the current technical solutions, a suitable compact application structure has not yet been given for the structure of the transformer integrated resonant inductor magnetic circuit applied to CLLC and DC / DC circuit systems. Utility Model Content

[0009] Based on this, it is necessary to provide a bidirectional transformer integrated resonant inductor magnetic circuit structure in order to solve the technical problem of how to integrate a bidirectional transformer and a resonant inductor magnetic circuit structure.

[0010] A bidirectional transformer integrated resonant inductor magnetic circuit structure, comprising: a connecting seat, a first inductor, a first transformer, a second inductor, a second transformer and an output structure; the connecting seat has a main body, a first limit mounting part, a second limit mounting part and an output limit structure; the first limit mounting part and the second limit mounting part are adjacently arranged on the main body; a plurality of output limit structures are distributed and arranged in the main body. The first inductor is fitted and connected with the first transformer, and the first limit mounting part is arranged in the first limit mounting part. The second inductor is fitted and connected with the second transformer, and the second inductor and the second transformer are arranged in the second limit mounting part. Each output structure is connected to an output limit structure, and each output structure is provided with a connecting body, an output cavity and a limit mounting claw; the end of the connecting body is provided with an output cavity, and the limit mounting claw is arranged in the connecting body, and the limit mounting claw is matched and connected with the output limit structure.

[0011] Furthermore, the connecting seat body has a fixed installation connection portion, and a plurality of the fixed installation connection portions are evenly arranged in the main body.

[0012] Furthermore, the connecting seat body has a plurality of heat dissipation windows, and at least one of the heat dissipation windows is arranged below the first position limiting mounting portion or the second position limiting mounting portion.

[0013] Furthermore, the first inductor unit has a first inductor core, a first inductor baffle, a first inductor winding frame and a first inductor winding.

[0014] Furthermore, the first inductor core has an inductor core pillar, and the inductor core pillar is arranged at the geometric center of the first inductor core.

[0015] Furthermore, the first inductor baffle is arranged between the first inductor magnetic core and the first inductor winding frame; the first inductor winding frame is sleeved outside the inductor magnetic core support, and the first inductor winding is sleeved outside the first inductor winding frame.

[0016] Furthermore, the first transformer part has a first transformer magnetic core, a first transformer blocking sheet, a first transformer winding skeleton and a first transformer winding.

[0017] Furthermore, the first transformer core has a transformer core pillar, and the transformer core pillar is arranged at the geometric center of the first transformer core; the two first transformer cores are relatively matched and connected, and the transformer core pillars provided in each of the first transformer cores are abutted and connected.

[0018] Furthermore, the two first transformer blocking sheets are respectively arranged at two ends of the first transformer winding frame; and the first transformer winding frame is sleeved outside the transformer magnetic core pillar.

[0019] Furthermore, the first transformer winding is sleeved outside the first transformer winding frame, and the first transformer winding is arranged between the two first transformer baffles.

[0020] In summary, the utility model bidirectional transformer integrated resonant inductor magnetic circuit structure is respectively provided with a connection seat, a first inductor part, a first transformer part, a second inductor part, a second transformer part and an output structure; the connection seat has a main body, a first limit mounting part, a second limit mounting part and an output limit structure; the first limit mounting part and the second limit mounting part are adjacently arranged on the main body; a plurality of output limit structures are distributed and arranged in the main body. The first inductor part is fitted and connected with the first transformer part, and the first limit mounting part is arranged in the first limit mounting part. The second inductor part is fitted and connected with the second transformer part, and the second inductor part and the second transformer part are arranged in the second limit mounting part. Each output structure is connected to an output limit structure correspondingly, and each output structure is provided with a connection main body, an output cavity and a limit mounting claw; the end of the connection main body is provided with an output cavity, and the limit mounting claw is arranged in the connection main body, and the limit mounting claw is correspondingly connected with the output limit structure. The first position limiting mounting part and the second position limiting mounting part are respectively and adjacently arranged on the main body provided with the connecting seat body, so that the first inductance part and the first transformer part can be arranged in the first position limiting mounting part; the second inductance part and the second transformer part can be arranged in the second position limiting mounting part. The first inductance part can have the same structure as the second inductance part, or a different structure; similarly, the first transformer part can have the same structure as the second transformer part, or a different structure. Therefore, the aforementioned elements can be combined to form a structural scheme of a bidirectional transformer integrated resonant inductor magnetic circuit. Therefore, the utility model bidirectional transformer integrated resonant inductor magnetic circuit structure solves the technical problem of how to integrate a bidirectional transformer and a resonant inductor magnetic circuit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the integrated resonant inductor magnetic circuit structure of the bidirectional transformer of the utility model;

[0022] Figure 2 It is a structural schematic diagram of another direction of the integrated resonant inductor magnetic circuit structure of the bidirectional transformer of the utility model;

[0023] Figure 3It is a schematic diagram of the exploded structure of the integrated resonant inductor magnetic circuit structure of the bidirectional transformer of the utility model. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] Please also read Figures 1 to 3 The utility model bidirectional transformer integrated resonant inductor magnetic circuit structure includes: a connection seat 1, a first inductor part 2, a first transformer part 3, a second inductor part 4, a second transformer part 5 and an output structure 6; the connection seat 1 has a main body 101, a first limit installation part 102, a second limit installation part 103 and an output limit structure 104; the first limit installation part 102 and the second limit installation part 103 are adjacently arranged on the main body 101; a plurality of output limit structures 104 are distributed in the main body 101. The first inductor part 2 is fitted and connected with the first transformer part 3, and the first inductor part 2 and the first transformer part 3 are arranged in the first limit installation part 102. The second inductor part 4 is fitted and connected with the second transformer part 5, and the second inductor part 4 and the second transformer part 5 are arranged in the second limit installation part 103. Each of the output structures 6 is connected to an output limiting structure 104, and each of the output structures 6 is provided with a connecting body 601, an output cavity 602 and a limiting mounting claw 603; the end of the connecting body 601 is provided with the output cavity 602, and the limiting mounting claw 603 is provided in the connecting body 601, and the limiting mounting claw 603 is correspondingly connected with the output limiting structure 104.

[0031] Specifically, in the overall scheme of the bidirectional transformer integrated resonant inductor magnetic circuit structure of the utility model, the connecting seat body 1 is a bridge connecting different inductors and transformer components, and a number of the output structures 6 are correspondingly arranged on it. That is, the first limit mounting part 102 and the second limit mounting part 103 are respectively arranged adjacent to each other on the main body 101 provided on the connecting seat body 1, so that the first inductor part 2 and the first transformer part 3 can be arranged in the first limit mounting part 102; the second inductor part 4 and the second transformer part 5 are arranged in the second limit mounting part 102. The first inductor part 2 can have the same structure as the second inductor part 4, or a different structure; similarly, the first transformer part 3 can have the same structure as the second transformer part 5, or a different structure. Thus, the above-mentioned elements can be combined to form a structural scheme of a bidirectional transformer integrated resonant inductor magnetic circuit. This structural scheme has the advantages of compact size and easy installation and adaptation.

[0032] Furthermore, the connection seat body 1 has a fixed installation connection part 105, and a plurality of the fixed installation connection parts 105 are evenly arranged in the main body 101. Specifically, the fixed installation connection parts 105 are conducive to the fixed installation connection between the connection seat body 1 and the external installation environment.

[0033] Furthermore, the coupling seat body 1 has a plurality of heat dissipation windows 106, and at least one heat dissipation window 106 is disposed below the first position-limiting mounting portion 102 or the second position-limiting mounting portion 103. Specifically, the first position-limiting mounting portion 102 and the second position-limiting mounting portion 103 are provided with the heat dissipation window 106 structure to facilitate the heat dissipation and transfer when the resonant inductor magnetic circuit structure of the bidirectional transformer is in working state.

[0034] Further, the first inductor part 2 has a first inductor core 201, a first inductor blocking piece 202, a first inductor winding frame 203 and a first inductor winding 204; the first inductor core 201 has an inductor core pillar 201a, and the inductor core pillar 201a is arranged at the geometric center of the first inductor core 201. The first inductor blocking piece 202 is arranged between the first inductor core 201 and the first inductor winding frame 203; the first inductor winding frame 203 is sleeved outside the inductor core pillar 201a, and the first inductor winding 204 is sleeved outside the first inductor winding frame 203. Specifically, the second inductor part 4 can have the same or similar structure as the first inductor part 2.

[0035] Further, the first transformer part 3 has a first transformer core 301, a first transformer blocking piece 302, a first transformer winding skeleton 303 and a first transformer winding 304; the first transformer core 301 has a transformer core pillar 301a, and the transformer core pillar 301a is arranged at the geometric center of the first transformer core 301; two first transformer cores 301 are connected in pairs, and the transformer core pillars 301a provided in each first transformer core 301 are connected in abutment. Two first transformer blocking pieces 302 are respectively arranged at the two ends of the first transformer winding skeleton 303; the first transformer winding skeleton 303 is sleeved outside the transformer core pillar 301a, the first transformer winding 304 is sleeved outside the first transformer winding skeleton 303, and the first transformer winding 304 is arranged between the two first transformer blocking pieces 302. Specifically, the second transformer part 5 can have the same or similar structure as the first transformer part 3.

[0036] In summary, the utility model bidirectional transformer integrated resonant inductor magnetic circuit structure is respectively provided with a connection seat 1, a first inductor part 2, a first transformer part 3, a second inductor part 4, a second transformer part 5 and an output structure 6; the connection seat 1 has a main body 101, a first limit mounting part 102, a second limit mounting part 103 and an output limit structure 104; the first limit mounting part 102 and the second limit mounting part 103 are adjacently arranged on the main body 101; a plurality of output limit structures 104 are distributed in the main body 101. The first inductor part 2 is fitted and connected with the first transformer part 3, and the first inductor part 2 and the first transformer part 3 are arranged in the first limit mounting part 102. The second inductor part 4 is fitted and connected with the second transformer part 5, and the second inductor part 4 and the second transformer part 5 are arranged in the second limit mounting part 103. Each of the output structures 6 is connected to an output limiting structure 104, and each of the output structures 6 is provided with a connecting body 601, an output cavity 602, and a limiting mounting claw 603; the end of the connecting body 601 is provided with an output cavity 602, and the limiting mounting claw 603 is provided in the connecting body 601, and the limiting mounting claw 603 is matched and connected with the output limiting structure 104. The first limiting mounting part 102 and the second limiting mounting part 103 are respectively arranged adjacent to each other on the main body 101 provided on the connecting seat 1, so that the first inductance part 2 and the first transformer part 3 can be arranged in the first limiting mounting part 102; the second inductance part 4 and the second transformer part 5 are arranged in the second limiting mounting part 102. The first inductance part 2 can have the same structure as the second inductance part 4, or a different structure; similarly, the first transformer part 3 can have the same structure as the second transformer part 5, or a different structure. Thus, the above-mentioned elements can be combined to form a bidirectional transformer integrated resonant inductor magnetic circuit structure. Therefore, the bidirectional transformer integrated resonant inductor magnetic circuit structure of the utility model solves the technical problem of how to integrate a bidirectional transformer and a resonant inductor magnetic circuit structure.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A bidirectional transformer integrated resonant inductor magnetic circuit structure, characterized in that: It includes: A connection seat (1), a first inductor (2), a first transformer (3), a second inductor (4), a second transformer (5) and an output structure (6); the connection seat (1) comprises a main body (101), a first position-limiting mounting part (102), a second position-limiting mounting part (103) and an output position-limiting structure (104); the first position-limiting mounting part (102) and the second position-limiting mounting part (103) are arranged adjacent to each other on the main body (101); a plurality of output position-limiting structures (104) are distributed in the main body (101); the first inductor (2) and the first transformer (3) are fitted and connected, and the first position-limiting mounting part (102) and the output position-limiting structure (104) are arranged in the first position-limiting mounting part (102). The first transformer part (3); the second inductor part (4) and the second transformer part (5) are fitted and connected, and the second inductor part (4) and the second transformer part (5) are arranged in the second limit-limiting mounting part (103); each of the output structures (6) is correspondingly connected to an output limit-limiting structure (104), and each of the output structures (6) is provided with a connecting body (601), an output cavity (602) and a limit-limiting mounting claw (603); an end of the connecting body (601) is arranged in the output cavity (602), and the limit-limiting mounting claw (603) is arranged in the connecting body (601), and the limit-limiting mounting claw (603) is correspondingly connected to the output limit-limiting structure (104).

2. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 1, characterized in that: The connection seat body (1) has a fixed installation connection portion (105), and a plurality of the fixed installation connection portions (105) are evenly arranged in the main body (101).

3. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 2, characterized in that: The connection seat body (1) has a plurality of heat dissipation windows (106), and at least one of the heat dissipation windows (106) is arranged below the first position limiting mounting portion (102) or the second position limiting mounting portion (103).

4. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 3, characterized in that: The first inductor part (2) comprises a first inductor magnetic core (201), a first inductor blocking sheet (202), a first inductor winding frame (203) and a first inductor winding (204).

5. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 4, characterized in that: The first inductor core (201) has an inductor core pillar (201a), and the inductor core pillar (201a) is arranged at the geometric center of the first inductor core (201).

6. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 5, characterized in that: The first inductor baffle (202) is arranged between the first inductor magnetic core (201) and the first inductor winding frame (203); the first inductor winding frame (203) is sleeved outside the inductor magnetic core pillar (201a), and the first inductor winding (204) is sleeved outside the first inductor winding frame (203).

7. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 6, characterized in that: The first transformer part (3) comprises a first transformer magnetic core (301), a first transformer blocking sheet (302), a first transformer winding skeleton (303) and a first transformer winding (304).

8. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 7, characterized in that: The first transformer magnetic core (301) has a transformer magnetic core pillar (301a), and the transformer magnetic core pillar (301a) is arranged at the geometric center of the first transformer magnetic core (301); the two first transformer magnetic cores (301) are relatively matched and connected, and the transformer magnetic core pillars (301a) provided in each of the first transformer magnetic cores (301) are abutted and connected.

9. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 8, characterized in that: The two first transformer blocking sheets (302) are respectively arranged at two ends of the first transformer winding frame (303); the first transformer winding frame (303) is sleeved outside the transformer magnetic core pillar (301a).

10. The bidirectional transformer integrated resonant inductor magnetic circuit structure according to claim 9, characterized in that: The first transformer winding (304) is sleeved outside the first transformer winding frame (303), and the first transformer winding (304) is arranged between the two first transformer baffles (302).

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