Transformer and vehicle

Abstract

The invention discloses a transformer and a vehicle, and relates to the technical field of transformers. The second magnetic core is oppositely connected with the first magnetic core; the first coil is wound on the first magnetic core; the coil assembly comprises a second coil and a third coil which are wound on the second magnetic core in parallel, the first coil and the second coil are arranged in a spaced mode to form first leakage inductance, the first coil and the third coil are arranged in a spaced mode to form second leakage inductance, and the first leakage inductance and the second leakage inductance form resonant inductance. According to the technical scheme provided by the invention, the volumes of the transformer and the resonant inductor are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a transformer and a vehicle. Background Art

[0002] In the existing on-board charger technology, the DC conversion circuit is generally divided into two stages. The front-stage circuit is a bidirectional high-voltage DC conversion circuit, whose output is connected to the on-board power battery to provide a high-voltage DC charging current; the circuit topology is generally an LLC resonant circuit, whose resonant inductor and main transformer are independent of each other and are used in the circuit as two discrete components. The rear-stage circuit is a low-voltage DC conversion circuit, whose input is connected in parallel with the on-board power battery to the output of the front-stage bidirectional high-voltage DC conversion circuit, and the output is connected to the low-voltage battery and other low-voltage loads. Its circuit topology is also mostly an LLC resonant circuit, and the transformer and resonant inductor are independent of each other as two discrete components.

[0003] This resonant inductor includes a resonant magnetic core and a resonant winding, and is generally integrated with the transformer through a back-to-back integration method to reduce the overall volume of the transformer and the resonant inductor.

[0004] However, the transformer and resonant inductor integrated in the back-to-back manner still have the problem of being relatively large in size. Summary of the invention

[0005] The main purpose of the present invention is to provide a transformer and a vehicle, aiming to reduce the volume of the transformer and the resonant inductor.

[0006] To achieve the above object, the transformer proposed in the present invention comprises:

[0007] a first magnetic core;

[0008] a second magnetic core, connected opposite to the first magnetic core;

[0009] A first coil, wound around the first magnetic core; and

[0010] The coil assembly includes a second coil and a third coil wound in parallel on the second magnetic core, the first coil and the second coil are arranged at intervals to form a first leakage inductance, and the first coil and the third coil are arranged at intervals to form a second leakage inductance, and the first leakage inductance and the second leakage inductance form a resonant inductance.

[0011] In one embodiment, the second coil and the third coil are both wound with multiple layers outside the second magnetic core.

[0012] In one embodiment, the positions of the second coils and the third coils in two adjacent layers are staggered.

[0013] In one embodiment, the transformer further includes a leakage inductance adjusting component, and the leakage inductance adjusting component is disposed between the coil assembly and the first coil.

[0014] In one embodiment, the leakage inductance adjusting member includes a third magnetic core, which is disposed between the coil assembly and the first coil and fixed to at least one of the first magnetic core and the second magnetic core.

[0015] In one embodiment, the first magnetic core includes a first linear portion, a second linear portion and a third linear portion, two first linear portions are provided at intervals, the second linear portion is provided between the two first linear portions, and the third linear portion connects the second linear portion and the two first linear portions;

[0016] The second magnetic core includes a fourth linear portion, a fifth linear portion and a sixth linear portion, wherein two fourth linear portions are provided at intervals, the fifth linear portion is provided between two fourth linear portions, and the sixth linear portion connects the fifth linear portion and the two fourth linear portions;

[0017] The first coil is wound on the second linear portion, and the second coil and the third coil are wound in parallel on the fifth linear portion.

[0018] In one embodiment, the transformer further includes a coil bracket, one end of the coil bracket is sleeved on the outside of the second linear portion, the other end of the coil bracket is sleeved on the outside of the fifth linear portion, the outer wall of the coil bracket is provided with a first wire groove and a second wire groove, the first coil is wound inside the first wire groove, and the second coil and the third coil are wound in parallel inside the second wire groove.

[0019] In one embodiment, the first magnetic core includes a seventh linear portion and an eighth linear portion, two seventh linear portions are provided at intervals, and the eighth linear portion connects the two seventh linear portions;

[0020] The second magnetic core includes a ninth linear portion and a tenth linear portion, two ninth linear portions are provided at intervals, and the tenth linear portion connects the two ninth linear portions;

[0021] The first coil is wound on the seventh linear portion, and the second coil and the third coil are wound in parallel on the ninth linear portion.

[0022] In one embodiment, the transformer further includes a shell, the shell is provided with a receiving cavity, and the first magnetic core, the second magnetic core, the first coil and the coil assembly are all arranged in the receiving cavity.

[0023] The present invention also provides a vehicle, comprising the above-mentioned transformer.

[0024] The transformer in the technical solution of the present invention includes a first magnetic core, a second magnetic core, a first coil and a coil assembly, the coil assembly includes a second coil and a third coil, the first magnetic core and the second magnetic core are relatively connected to form a magnetic circuit, the first coil is wound around the first magnetic core to form a secondary winding, the second coil and the third coil are wound around the second magnetic core to form two primary windings, the second coil and the first coil are spaced to form a first leakage inductance, the third coil and the first coil are spaced to form a second leakage inductance, the first leakage inductance and the second leakage inductance can be regarded as inductances connected in series with the primary winding of the transformer, and the resonant inductance is also connected in series with the transformer, so the first leakage inductance and the second leakage inductance can replace the resonant inductance, and there is no need to additionally set up a resonant inductance magnetic core and a resonant inductance winding, thereby reducing the number of parts, simplifying the structure of the transformer, and reducing the volume and weight of the transformer. Among them, the second coil and the third coil are wound in parallel on the second magnetic core, and the second coil and the third coil are closely positioned by parallel winding, which reduces the distance difference between the second coil and the third coil and the first coil, thereby reducing the difference between the first leakage inductance and the second leakage inductance, improving the resonance effect, and also reducing the AC resistance and reducing the loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 A cross-sectional view of an embodiment of a transformer provided by the present invention;

[0027] Figure 2 A schematic diagram of a partial structure of a transformer according to an embodiment of the present invention Figure 1 ;

[0028] Figure 3 A cross-sectional view of another embodiment of a transformer provided by the present invention;

[0029] Figure 4 A schematic diagram of a partial structure of a transformer according to an embodiment of the present invention Figure 2 ;

[0030] Figure 5 A schematic structural diagram of a coil support of a transformer according to an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of a partial structure of a transformer according to an embodiment of the present invention Figure 3 ;

[0032] Figure 7 A schematic structural diagram of a second magnetic core of an embodiment of a transformer provided by the present invention;

[0033] Figure 8 A schematic diagram of a partial structure of a transformer according to an embodiment of the present invention Figure 4 ;

[0034] Fig. 9 A cross-sectional view of another embodiment of a transformer provided by the present invention;

[0035] Fig.10 A circuit diagram of an embodiment of a transformer provided by the present invention.

[0036] Description of Figure Numbers:

[0037] 100, first magnetic core; 110, first linear portion; 120, second linear portion; 130, third linear portion; 140, seventh linear portion; 150, eighth linear portion;

[0038] 200, second magnetic core; 210, fourth linear portion; 220, fifth linear portion; 230, sixth linear portion; 240, ninth linear portion; 250, tenth linear portion;

[0039] 300, first coil;

[0040] 400, coil assembly; 410, second coil; 420, third coil;

[0041] 500, leakage inductance adjustment component;

[0042] 600, coil support; 610, first wire slot; 620, second wire slot;

[0043] 700. Mounting plate.

[0044] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0047] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0048] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present invention, the descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] The present invention provides a transformer.

[0050] See also Figure 1 to Figure 2 , Figure 1 A cross-sectional view of an embodiment of a transformer provided by the present invention, Figure 2 A schematic diagram of a partial structure of a transformer according to an embodiment of the present invention Figure 1 .

[0051] In one embodiment of the present invention, the transformer comprises:

[0052] A first magnetic core 100;

[0053] The second magnetic core 200 is connected to the first magnetic core 100;

[0054] A first coil 300 is wound around the first magnetic core 100; and

[0055] The coil assembly 400 includes a second coil 410 and a third coil 420 wound in parallel on the second magnetic core 200. The first coil 300 and the second coil 410 are spaced apart to form a first leakage inductance, and the first coil 300 and the third coil 420 are spaced apart to form a second leakage inductance. The first leakage inductance and the second leakage inductance form a resonant inductance.

[0056] The transformer in the technical solution of the present invention includes a first magnetic core 100, a second magnetic core 200, a first coil 300 and a coil assembly 400, the coil assembly 400 includes a second coil 410 and a third coil 420, the first magnetic core 100 and the second magnetic core 200 are relatively connected to form a magnetic circuit, the first coil 300 is wound around the first magnetic core 100 to form a secondary winding, the second coil 410 and the third coil 420 are wound around the second magnetic core 200 to form two primary windings, the second coil 410 and the first coil 300 are spaced apart to form a first leakage inductance, the third coil 420 and the first coil 300 are spaced apart to form a second leakage inductance, the first leakage inductance and the second leakage inductance can be regarded as inductances connected in series with the primary winding of the transformer, and the resonant inductance is also connected in series with the transformer, so the first leakage inductance and the second leakage inductance can replace the resonant inductance, and there is no need to additionally set up a resonant inductor core and a resonant inductor winding, thereby reducing the number of components, simplifying the structure of the transformer, and reducing the volume and weight of the transformer. Among them, the second coil 410 and the third coil 420 are wound in parallel on the second magnetic core 200. The parallel winding method makes the second coil 410 and the third coil 420 closely positioned, reducing the distance difference between the second coil 410 and the third coil 420 and the first coil 300, thereby reducing the difference between the first leakage inductance and the second leakage inductance, improving the resonance effect, and also reducing the AC resistance and reducing the loss.

[0057] It is understandable that the larger the interval between the second coil 410 and the first coil 300, the larger the first leakage inductance; the larger the interval between the third coil 420 and the first coil 300, the larger the second leakage inductance. Therefore, by changing the interval between the coil assembly 400 and the first coil 300, the size of the first leakage inductance and the second leakage inductance can be changed. In this embodiment, the size of the interval between the second coil 410 and the first coil 300 and the size of the interval between the third coil 420 and the first coil 300 can be designed as needed to meet the functional requirements, and are not limited here.

[0058] Combination Figure 4 and Fig.10 Specifically in this embodiment, the transformer forms five ports, the first end of the second coil 410 is port 1, the first end of the third coil 420 and the second end of the second coil 410 are connected together to form port 2, the second end of the third coil 420 is port 3, and the two ends of the first coil 300 are port 4 and port 5 respectively.

[0059] In one embodiment, the second coil 410 and the third coil 420 are both wound with multiple layers outside the second magnetic core 200 .

[0060] In an embodiment of the present invention, the second coil 410 and the third coil 420 are wound in parallel in multiple layers. The multi-layer winding increases the total number of turns of the second coil 410 and the total number of turns of the third coil 420, thereby increasing the induced voltage of the transformer and improving the output capacity of the transformer. In addition, increasing the number of coil turns increases the power density of the transformer, which is conducive to making the structure of the transformer more compact.

[0061] In one embodiment, the positions of the second coils 410 and the third coils 420 of two adjacent layers are staggered.

[0062] Reference Figure 1 In the embodiment of the present invention, the multi-layered second coil 410 and the third coil 420 are subjected to a wire turning process for each layer, so that the second coil 410 and the third coil 420 of the previous layer are staggered with the second coil 410 and the third coil 420 of the next layer, that is, the second coil 410 of the previous layer is pressed on the third coil 420 of the next layer and the third coil 420 of the previous layer is pressed on the second coil 410 of the next layer. Through this staggered arrangement, the position distribution of the second coil 410 and the third coil 420 in the coil assembly 400 is more uniform, the average distance between the multi-layer second coil 410 and the first coil 300 and the average distance between the multi-layer third coil 420 and the first coil 300 are reduced, the difference between the first leakage inductance and the second leakage inductance is further reduced, the resonance effect is improved, and the AC resistance and loss are reduced.

[0063] In one embodiment, the transformer further includes a leakage inductance adjusting component 500 , and the leakage inductance adjusting component 500 is disposed between the coil assembly 400 and the first coil 300 .

[0064] Reference Figure 3 In the embodiment of the present invention, a leakage inductance adjusting member 500 is further provided between the coil assembly 400 and the first coil 300. The leakage inductance adjusting member 500 is used to increase the first leakage inductance and the second leakage inductance. The leakage inductance adjusting member 500 may be a block made of materials such as plastic and ceramic, or may be a magnetic core. The specific shape and material of the leakage inductance adjusting member 500 may be designed as required to meet the functional requirements, and are not limited here. By providing the leakage inductance adjusting member 500 to increase the first leakage inductance and the second leakage inductance, a larger leakage inductance can be obtained without providing a larger interval between the coil assembly 400 and the first coil 300, so that the first leakage inductance and the second leakage inductance meet the requirements of being a resonant inductance, thereby making the structure of the transformer more compact and reducing the volume of the transformer.

[0065] In one embodiment, the leakage inductance adjusting member 500 includes a third magnetic core, which is disposed between the coil assembly 400 and the first coil 300 and fixed to at least one of the first magnetic core 100 and the second magnetic core 200 .

[0066] In the embodiment of the present invention, the leakage inductance adjusting member 500 includes a third magnetic core, and it is easy to adjust the size of the first leakage inductance and the second leakage inductance by adjusting the number of the third magnetic cores, replacing the magnetic core of another material as the third magnetic core, etc., so as to obtain the required leakage inductance size, which is simpler and more convenient to operate than rewinding the wire to change the interval size between the coil assembly 400 and the first coil 300. The third magnetic core can be fixed to the first magnetic core 100 or the second magnetic core 200, so that the third magnetic core is firmly positioned, and the third magnetic core is prevented from moving and affecting the size of the first leakage inductance and the second leakage inductance, thereby improving the stability of the formed first leakage inductance and the second leakage inductance.

[0067] In an embodiment of the present invention, the third magnetic core is one of a U-shaped magnetic core, an I-shaped magnetic core, an E-shaped magnetic core, and an O-shaped magnetic core. Third magnetic cores of different shapes can provide different magnetic circuits. Magnetic cores of different shapes can be selected according to specific needs as long as the functional requirements are met. No limitation is made here.

[0068] In one embodiment, the first magnetic core 100 includes a first linear portion 110, a second linear portion 120, and a third linear portion 130, wherein two first linear portions 110 are provided at intervals, the second linear portion 120 is provided between the two first linear portions 110, and the third linear portion 130 connects the second linear portion 120 and the two first linear portions 110;

[0069] The second magnetic core 200 includes a fourth linear portion 210, a fifth linear portion 220 and a sixth linear portion 230, wherein two fourth linear portions 210 are provided at intervals, the fifth linear portion 220 is provided between the two fourth linear portions 210, and the sixth linear portion 230 connects the fifth linear portion 220 and the two fourth linear portions 210;

[0070] The first coil 300 is wound on the second linear portion 120 , and the second coil 410 and the third coil 420 are wound in parallel on the fifth linear portion 220 .

[0071] Reference Figure 1 and Figure 7In the embodiment of the present invention, the first magnetic core 100 and the second magnetic core 200 are both E-type magnetic cores. The first magnetic core 100 and the second magnetic core 200 adopt the same structure and shape, which reduces the types of parts. The two are symmetrically arranged and the E-shaped openings are relatively connected. The first magnetic core 100 and the second magnetic core 200 have simple structures and mature manufacturing processes. In addition, the E-type magnetic core has a longer magnetic circuit, can provide higher power handling capacity, and is suitable for high-power transformers. The first magnetic core 100 includes two first linear parts 110, a second linear part 120 and a third linear part 130. The two first linear parts 110 are arranged in parallel, the second linear part 120 is arranged between the two first linear parts 110 and is parallel to any one of the first linear parts 110, the two ends of the third linear part 130 are connected to the two first linear parts 110, the middle of the third linear part 130 is connected to the second linear part 120, and the first linear part 110 and the second linear part 120 are both perpendicular to the third linear part 130. The second magnetic core 200 includes two fourth linear portions 210, a fifth linear portion 220 and a sixth linear portion 230. The two fourth linear portions 210 are arranged in parallel, the fifth linear portion 220 is arranged between the two fourth linear portions 210 and is parallel to any one of the fourth linear portions 210, the sixth linear portion 230 connects the fifth linear portion 220 and the two fourth linear portions 210, and the fourth linear portion 210 and the fifth linear portion 220 are both perpendicular to the sixth linear portion 230. The first coil 300 is wound around the second linear portion 120 of the first magnetic core 100, and the second coil 410 and the third coil 420 are wound around the fifth linear portion 220 of the second magnetic core 200 in parallel.

[0072] In one embodiment, the transformer also includes a coil bracket 600, one end of the coil bracket 600 is sleeved on the outside of the second linear portion 120, and the other end of the coil bracket 600 is sleeved on the outside of the fifth linear portion 220. The outer wall of the coil bracket 600 is provided with a first wire groove 610 and a second wire groove 620, the first coil 300 is wound inside the first wire groove 610, and the second coil 410 and the third coil 420 are wound in parallel inside the second wire groove 620.

[0073] Reference Figures 4 to 6In an embodiment of the present invention, the transformer further comprises a coil support 600, the outer wall of the coil support 600 is provided with a first wire groove 610 and a second wire groove 620, the first coil 300 is wound inside the first wire groove 610, and the second coil 410 and the third coil 420 are wound in parallel inside the second wire groove 620, which is convenient for coil winding and reduces the possibility of coil position movement, thereby improving the stability of the transformer working performance. The specific assembly process is as follows: firstly, the first coil 300, the second coil 410 and the third coil 420 are wound outside the coil support 600, and then the second linear portion 120 of the first magnetic core 100 and the fifth linear portion 220 of the second magnetic core 200 are inserted from both ends of the coil support 600 for docking, which reduces the difficulty of winding and improves the convenience of transformer assembly. Specifically in this embodiment, the coil bracket 600 includes a sleeve portion and a baffle portion. The sleeve portion is sleeved on the outside of the second linear portion 120 and the fifth linear portion 220. There are four baffle portions, which are arranged at intervals on the outer wall of the sleeve portion. A groove is formed between two adjacent baffle portions, wherein the grooves on both sides are the first wire groove 610 and the second wire groove 620 respectively, and the groove in the middle is used to install and fix the third magnetic core.

[0074] Reference Figure 2 and Figure 8 In the embodiment of the present invention, the transformer further comprises a mounting plate 700, which is arranged on one side of the first magnetic core 100 and the second magnetic core 200. The coil support 600, the first magnetic core 100 and the second magnetic core 200 are all fixed on the mounting plate 700, which further improves the firmness of the connection between the first magnetic core 100 and the second magnetic core 200, reduces the possibility of separation or movement of the first magnetic core 100 and the second magnetic core 200, and thus improves the stability of the working performance of the transformer. Figure 7 and Figure 8 The first linear portion 110 and the fourth linear portion 210 are both provided with arc-shaped ribs on the side away from the mounting plate 700, corresponding to the shape of the coil, which not only protects the coil to a certain extent, but also improves the coupling efficiency between the coil and the magnetic core.

[0075] In one embodiment, the first magnetic core 100 includes a seventh linear portion 140 and an eighth linear portion 150 , two seventh linear portions 140 are provided at intervals, and the eighth linear portion 150 connects the two seventh linear portions 140 ;

[0076] The second magnetic core 200 includes a ninth linear portion 240 and a tenth linear portion 250 , two ninth linear portions 240 are provided at intervals, and the tenth linear portion 250 connects the two ninth linear portions 240 ;

[0077] The first coil 300 is wound on the seventh linear portion 140 , and the second coil 410 and the third coil 420 are wound in parallel on the ninth linear portion 240 .

[0078] Reference Fig. 9 In the embodiment of the present invention, the first magnetic core 100 and the second magnetic core 200 are both U-shaped magnetic cores or C-shaped magnetic cores. The first magnetic core 100 and the second magnetic core 200 adopt the same structure and shape. The two are symmetrically arranged and the openings are relatively connected. The structure is simple and the manufacturing process is mature. In addition, the structure of the U-shaped magnetic core and the C-shaped magnetic core is relatively compact, which is conducive to reducing the volume of the transformer. The first magnetic core 100 includes two seventh linear parts 140 and one eighth linear part 150. The two seventh linear parts 140 are arranged in parallel, and the two ends of the eighth linear part 150 are connected to the two seventh linear parts 140. The second magnetic core 200 includes two ninth linear parts 240 and one tenth linear part 250. The two ninth linear parts 240 are arranged in parallel, and the two ends of the tenth linear part 250 are connected to the two ninth linear parts 240. Among them, the first coil 300 is wound on the seventh linear portion 140, and the second coil 410 and the third coil 420 are wound in parallel on the ninth linear portion 240. The second coil 410 and the third coil 420 can be wound in parallel on the two ninth linear portions 240, and the first coil 300 can be wound correspondingly on the two seventh linear portions 140; the second coil 410 and the third coil 420 can also be wound in parallel on one of the ninth linear portions 240, and the first coil 300 can be wound correspondingly on the seventh linear portion 140 connected to this ninth linear portion 240.

[0079] In one embodiment, the transformer further includes a shell, the shell is provided with a receiving cavity, and the first magnetic core 100, the second magnetic core 200, the first coil 300 and the coil assembly 400 are all provided in the receiving cavity.

[0080] In an embodiment of the present invention, the transformer also includes a shell, which is provided with a receiving cavity. The shell protects the components inside the receiving cavity from the influence of the external environment, such as temperature changes, humidity changes, dust and mechanical shocks, which is beneficial to extending the service life of the transformer.

[0081] The present invention also proposes a vehicle, including the above-mentioned transformer. The specific structure of the transformer refers to the above-mentioned embodiment. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, the transformer can be used in various systems of the vehicle, such as an on-board charger, a DC-DC converter, etc. By adopting the above-mentioned transformer, the vehicle space occupied by the transformer is reduced, and the load on the vehicle is reduced.

[0082] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A transformer, characterized in that: include: a first magnetic core; a second magnetic core, connected opposite to the first magnetic core; A first coil, wound around the first magnetic core; as well as The coil assembly includes a second coil and a third coil wound in parallel on the second magnetic core, the first coil and the second coil are arranged at intervals to form a first leakage inductance, and the first coil and the third coil are arranged at intervals to form a second leakage inductance, and the first leakage inductance and the second leakage inductance form a resonant inductance.

2. The transformer according to claim 1, characterized in that The second coil and the third coil are both wound with multiple layers outside the second magnetic core.

3. The transformer according to claim 2, characterized in that: The positions of the second coils and the third coils of two adjacent layers are staggered.

4. The transformer according to claim 1, characterized in that The transformer further includes a leakage inductance adjusting component, and the leakage inductance adjusting component is arranged between the coil assembly and the first coil.

5. The transformer according to claim 4, characterized in that The leakage inductance adjusting component includes a third magnetic core, which is disposed between the coil assembly and the first coil and fixed to at least one of the first magnetic core and the second magnetic core.

6. The transformer according to claim 1, characterized in that The first magnetic core includes a first linear portion, a second linear portion and a third linear portion, two first linear portions are provided at intervals, the second linear portion is provided between the two first linear portions, and the third linear portion connects the second linear portion and the two first linear portions; The second magnetic core includes a fourth linear portion, a fifth linear portion and a sixth linear portion, wherein two fourth linear portions are provided at intervals, the fifth linear portion is provided between two fourth linear portions, and the sixth linear portion connects the fifth linear portion and the two fourth linear portions; The first coil is wound on the second linear portion, and the second coil and the third coil are wound in parallel on the fifth linear portion.

7. The transformer according to claim 6, characterized in that The transformer also includes a coil bracket, one end of which is sleeved on the outside of the second linear portion, and the other end of the coil bracket is sleeved on the outside of the fifth linear portion. The outer wall of the coil bracket is provided with a first wire groove and a second wire groove, the first coil is wound inside the first wire groove, and the second coil and the third coil are wound in parallel inside the second wire groove.

8. The transformer according to claim 1, characterized in that The first magnetic core includes a seventh linear portion and an eighth linear portion, two seventh linear portions are provided at intervals, and the eighth linear portion connects the two seventh linear portions; The second magnetic core includes a ninth linear portion and a tenth linear portion, two ninth linear portions are provided at intervals, and the tenth linear portion connects the two ninth linear portions; The first coil is wound on the seventh linear portion, and the second coil and the third coil are wound in parallel on the ninth linear portion.

9. The transformer according to any one of claims 1 to 8, characterized in that: The transformer further comprises a shell, wherein the shell is provided with a receiving cavity, and the first magnetic core, the second magnetic core, the first coil and the coil assembly are all arranged in the receiving cavity.

10. A vehicle, characterized in that: Comprising the transformer according to any one of claims 1 to 9.

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