CN217640946U - OBC transformer and bracket component thereof - Google Patents

Abstract

The utility model discloses an OBC transformer and a bracket component thereof, wherein the bracket component comprises a base unit and a framework unit, the framework unit is connected and arranged on the base unit, end baffles are respectively arranged at the two ends of the outer side wall of the framework unit along the axial direction, and two middle baffles are arranged in parallel between the two end baffles; the outer side wall of the framework unit is further provided with wire passing grooves along the axial direction, and the wire passing grooves are at least arranged between the two side walls of the middle baffle plates in a penetrating mode. The utility model discloses no longer need set up resonant inductance alone for the occupation space of transformer reduces, and material cost and the also corresponding reduction of cost of labor.

Description

OBC transformer and bracket component thereof

Technical Field

The utility model relates to a transformer technical field especially relates to an OBC transformer and bracket component thereof.

Background

An existing high-power OBC (on-board charger) transformer needs to meet high power, an inductor is usually required to be added in the transformer to serve as a resonant inductor, and the size of the inductor is usually large, so that the occupied space of the corresponding transformer is also large, and meanwhile, the material cost and the labor cost are also increased correspondingly.

The above background disclosure is only provided as an aid to understanding the concept and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to evaluate the novelty and inventive step of the present application in the case that there is no clear evidence that the above contents are disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an OBC transformer and bracket component thereof no longer need set up resonance inductance alone for the occupation space of transformer reduces, and material cost and the also corresponding reduction of cost of labor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in a first aspect, a bracket assembly of an OBC transformer comprises a base unit and a framework unit, wherein the framework unit is connected and arranged on the base unit, end baffles are respectively arranged at two ends of the outer side wall of the framework unit along the axial direction, and two middle baffles are arranged between the two end baffles in parallel; the outer side wall of the framework unit is further provided with wire passing grooves along the axial direction, and the wire passing grooves are at least arranged between the two side walls of the middle baffle plates in a penetrating mode.

Preferably, the end parts of the two ends of the wire passing groove respectively extend to the inner side walls of the two end baffles.

Preferably, the bottom of the two end baffles is provided with a buckle, the base unit is provided with a bayonet, and the buckle is correspondingly connected with the bayonet in a clamping manner.

Preferably, a plurality of heat dissipation holes are formed in the outer side wall of the framework unit, and the heat dissipation holes are formed in the end portion baffle and the middle baffle and/or the middle baffle respectively.

In a second aspect, the utility model discloses an OBC transformer, including magnetic core assembly, coil pack and first aspect the bracket component, wherein the magnetic core assembly connect set up in the inner chamber of skeleton unit, the coil pack includes primary coil unit and secondary coil unit, the primary coil unit is including linking first primary coil and second primary coil as an organic whole, first primary coil with the second primary coil twines respectively the lateral wall of skeleton unit just is located both ends respectively the end baffle with correspond adjacent department between the intermediate baffle, wherein first primary coil with the place that the second primary coil links to each other set up in cross the wire casing, the secondary coil unit winding just is located two the lateral wall of skeleton unit between the intermediate baffle.

Preferably, the magnetic core assembly comprises two end magnetic cores, at least one magnetic pillar and at least two air gap spacers, wherein the air gap spacers are disposed between the magnetic pillar and the end magnetic core or between two adjacent magnetic pillars, and the magnetic pillars are both disposed between the two end magnetic cores.

Preferably, two end magnetic cores adopt UU-shaped magnetic cores, and the magnetic core assembly comprises at least two magnetic columns and at least four air gap gaskets.

Preferably, the air gap gasket is a ceramic plate, and holes are formed in the ceramic plate.

Preferably, the OBC transformer further includes a heat conduction assembly, the heat conduction assembly includes a plurality of heat conduction blocks, and is a plurality of the heat conduction block respectively laminate set up in first primary coil, second primary coil and the lateral wall department of secondary coil unit.

Preferably, the heat conducting block is a ceramic block.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses a bracket component of OBC transformer is through setting up tip baffle, middle baffle and crossing wire casing etc. on the skeleton unit for can directly form the hourglass inductance that can regard as resonant inductance between primary and the secondary coil, thereby no longer need set up resonant inductance alone, make the occupation space of transformer reduce, and material cost and the also corresponding reduction of cost of labor.

In a further aspect, the present invention also has the following advantages:

(1) Automatic winding: based on the utility model provides a bracket component of OBC transformer can not need sleeve pipe, unnecessary sticky tape, wherein is equipped with the wire casing on the skeleton unit, and the space is reasonable, can adopt automatic wire winding.

(2) Volume reduction: the device of the resonant inductor is removed, and the leakage inductance of the transformer is adopted to achieve the function of the resonant inductor.

(3) Temperature rise is reduced: firstly, a UU-shaped magnetic core is adopted, a coil is wound on the outer side, and after glue is filled into a client, the coil dissipates heat well; secondly, a plurality of heat dissipation holes are formed in the framework unit, so that heat in the middle of the magnetic core assembly can be conveniently conducted out through the coil assembly; and thirdly, the air gap is filled with a ceramic chip with high heat conductivity coefficient, so that heat inside the magnetic core assembly is quickly conducted to two sides outside the magnetic core and then is led out through glue.

(4) Parts are reduced, and material cost is reduced: after the resonance inductance is reduced, the related magnetic core, skeleton, wire, labor cost and the like are correspondingly reduced.

(5) The process is simple and reliable, the assembly error is reduced, and the working time required by assembly is reduced; automatic wire winding of coil, the magnetic core tool bonds, and the skeleton has the buckle fixed with the base, can adopt resistance welding or adopt the plug wire terminal after the pin extension.

Drawings

Fig. 1 is a schematic structural diagram of a high-power OBC transformer according to a preferred embodiment of the present invention;

FIG. 2 is a schematic diagram of a bottom angle of the high power OBC transformer of FIG. 1;

fig. 3 is an exploded view of the high power OBC transformer of fig. 1;

fig. 4 is a schematic structural view of a bracket assembly of a high-power OBC transformer according to another preferred embodiment of the present invention;

FIG. 5 is a schematic structural view of the base unit of FIG. 4;

fig. 6 is a schematic diagram of the structure of the skeletal unit in fig. 4.

Detailed Description

The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixed or circuit/signal communication role.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate description of the embodiments of the invention and to simplify description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular manner of operation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1 to 3, a preferred embodiment of the present invention discloses a high power OBC transformer, which includes a bracket assembly 10, a magnetic core assembly 20, and a coil assembly 30.

With reference to fig. 4 to 6, another preferred embodiment of the present invention discloses a bracket assembly 10 for a high-power OBC transformer, including a base unit 11 and two framework units 12, two framework units 12 are connected and disposed on the base unit 11, both ends along the axial direction on the outer sidewall of the framework unit 12 are respectively provided with a first end baffle 121 and a second end baffle 122, and a first middle baffle 123 and a second middle baffle 124 are disposed in parallel between the first end baffle 121 and the second end baffle 122, in addition, a wire passing groove 125 is further disposed on the outer sidewall of the framework unit 12 along the axial direction, and the wire passing groove 125 at least runs through and is disposed between the two sidewalls of the first middle baffle 123 and the second middle baffle 124 opposite to each other.

In some embodiments, the outer surface of the skeleton unit 12 may further be provided with a plurality of fixed baffle positions, so that the first intermediate baffle 123 and the second intermediate baffle 124 may be adjusted and fixed at the corresponding fixed baffle positions according to actual requirements; or in other embodiments, the outer surface of the skeleton unit 12 may further be provided with a baffle sliding portion, so that the first intermediate baffle 123 and the second intermediate baffle 124 may slide between the baffle sliding portions and be fixed at any position to be fixed, and in addition, the thicknesses of the first intermediate baffle 123 and the second intermediate baffle 124 may also be adjusted according to actual needs.

In the present embodiment, both end portions of the wire passing groove 125 extend to inner sidewalls of the first and second end gates 121 and 122, respectively.

The bottom of first end baffle 121 and second end baffle 122 is equipped with buckle 126 respectively, is equipped with bayonet 111 on the base unit 11, and buckle 126 corresponds the block connection in bayonet 111 department to make skeleton unit 12 fixed connection on base unit 11. Still be equipped with out foot hole 112, encapsulating hole 113 on the base 11, play foot hole 112 wherein can be used for the PIN foot to draw forth fixedly or binding post is fixed, convenient equipment to can satisfy the user encapsulating demand.

A plurality of heat dissipation holes 127 are formed on the outer side wall of the frame unit 12, and the heat dissipation holes 127 are respectively formed between the baffles. In a specific embodiment, 12 heat dissipation holes 127 are formed in the base of the skeleton unit 12 along the circumferential direction (3 heat dissipation holes 127 are formed between the first end baffle 121 and the first intermediate baffle 123, 3 heat dissipation holes 127 are formed between the second end baffle 122 and the second intermediate baffle 124, and 6 heat dissipation holes 127 are formed between the first intermediate baffle 123 and the second intermediate baffle 124), on one hand, the wound coil can still be supported, on the other hand, heat of the magnetic core assembly can be quickly conducted out to the coil assembly, and then conducted out through potting adhesive, so that the heat dissipation effect of the magnetic core assembly inserted into the inner cavity 128 of the skeleton unit 12 is improved.

As shown in fig. 1 to 3, the magnetic core assembly 20 is connected and disposed in the inner cavity of the frame unit 12, the coil assembly 30 includes a primary coil unit 31 and a secondary coil unit 32, the primary coil unit 31 includes a first primary coil 311 and a second primary coil 312 connected together, the first primary coil 311 is wound around the outer sidewall of the frame unit 12 and located between the first end baffle 121 and the first middle baffle 123, the second primary coil 312 is wound around the outer sidewall of the frame unit 12 and located between the second end baffle 122 and the second middle baffle 124, wherein the connection point between the first primary coil 311 and the second primary coil 312 is disposed in the wire passing groove 125, and the secondary coil unit 32 is wound around the outer sidewall of the frame unit 12 and located between the first middle baffle 123 and the second middle baffle 124. Wherein the coils of the first primary coil 311 and the second primary coil 312 are connected, the winding can be automated.

Specifically, the coils adopted by the first primary coil 311, the second primary coil 312 and the secondary coil unit 32 are all CLASS H-level high-performance coating lines (the overlapping rate reaches 83%), and various safety requirements of the transformer are met.

As shown in fig. 3, the magnetic core assembly 20 includes two end magnetic cores 21, two magnetic pillars 22, and four air-gap spacers 23, where the air-gap spacers 23 are disposed between the magnetic pillars 22 and the end magnetic cores 21, the two end magnetic cores 21 are UU-type magnetic cores, and the two magnetic pillars 22 are respectively disposed between the two end magnetic cores 21. In this embodiment, by disposing the magnetic pillar 22 between the two end cores 21 and disposing the air gap spacer 23 between the magnetic pillar 22 and the end core 21, a large air gap between the two end cores 21 is uniformly divided into two small air gaps, thereby effectively reducing air gap diffusion magnetic flux. In some other embodiments, the number of the magnetic pillars 22 may be increased by multiple times, the number of the corresponding air-gap shims 23 is increased, wherein the air-gap shims 23 may be disposed between the magnetic pillar 22 and the end portion magnetic core 21 or between two adjacent magnetic pillars 22, the number of the specifically disposed magnetic pillars 22 and air-gap shims 23 may be adjusted according to actual requirements, generally, a large air gap is divided into small air gaps, the number of the small air gaps is not more than 5, for example, corresponding to the UU type magnetic core in this embodiment, the number of the magnetic pillars 22 is not more than 8, and the number of the air-gap shims 23 is not more than 10.

The air gap spacer 23 is made of an insulating material, such as a ceramic plate, and a hole is further formed in the ceramic plate, so that heat of the magnetic core assembly 20 in the middle can be quickly conducted out through the ceramic plate with the hole.

In this embodiment, the high-power OBC transformer further includes a heat conducting assembly 40, where the heat conducting assembly 40 includes three heat conducting blocks 41, and the three heat conducting blocks 41 are respectively attached to the outer sidewalls of the first primary coil 311, the second primary coil 312, and the secondary coil unit 32. Wherein the heat conducting block 41 is a ceramic block. Three heat conduction blocks 41 are arranged on the outer side walls of the first primary coil 311, the second primary coil 312 and the secondary coil unit 32, so that on one hand, a heat conduction effect can be achieved, on the other hand, a filling effect is achieved, and the pouring sealant is saved.

In this embodiment, two tip magnetic cores 21 adopt UU type magnetic core, and coil pack 30 twines in the outside of skeleton unit 12, and the product encapsulating back coil can better heat dissipation. Wherein, still be provided with the magnetic pillar 22 between two end magnetic cores 21, and set up air gap gasket 23 between magnetic core 21 and magnetic pillar 22, form distributed air gap, reduce air gap diffusion magnetic flux effectively.

Through the bracket assembly 10 provided by the embodiment of the present invention, the first end baffle 121, the second end baffle 122, the first middle baffle 123, the second middle baffle 124 and the wire passing groove 125 are arranged on the framework unit 12, so that the primary coil unit 31 can pass the wire from the bottom of the secondary coil unit 32, on one hand, automatic wire winding is realized, and the problems of reliability and consistency when the primary lead crosses the secondary are solved; on the other hand, leakage inductance (LK) between the primary coil unit 31 and the secondary coil unit 32 can be regarded as resonance inductance (tolerance can be +/-5%), so that the resonance inductance is integrated and designed into the transformer, materials are saved, the size is reduced, and the cost is reduced. The leakage inductance between the primary coil unit 31 and the secondary coil unit 32 is a leakage inductance that is called a leakage inductance, in which the magnetic fluxes generated by the primary and secondary coils of the transformer do not entirely pass through the main magnetic core, but a part of the magnetic fluxes form a loop through air, and the leakage flux generates an inductance value. In practical applications, the positions and thicknesses of the first intermediate baffle 123 and the second intermediate baffle 124 can be changed to adjust the size of the leakage inductance.

The background section of the present invention may contain background information regarding the problems or environment of the present invention rather than describing the prior art by others. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific/preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. For those skilled in the art to which the invention pertains, a plurality of alternatives or modifications can be made to the described embodiments without departing from the concept of the invention, and these alternatives or modifications should be considered as belonging to the protection scope of the invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the invention as defined by the appended claims.

Claims (10)

1. The support assembly of the OBC transformer is characterized by comprising a base unit and a framework unit, wherein the framework unit is connected and arranged on the base unit, end baffles are respectively arranged at two ends of the outer side wall of the framework unit along the axial direction, and two middle baffles are arranged between the two end baffles in parallel; the outer side wall of the framework unit is further provided with a wire passing groove along the axial direction, and the wire passing groove at least penetrates through the two side walls with back-to-back faces of the middle baffles.

2. The bracket assembly of claim 1, wherein the ends of the wire passing groove extend to the inner side walls of the two end baffles respectively.

3. The bracket assembly according to claim 1, wherein the bottom of the two end baffles is provided with a buckle, the base unit is provided with a bayonet, and the buckle is correspondingly connected at the bayonet in a clamping manner.

4. The bracket assembly of claim 1, wherein a plurality of heat dissipation holes are formed on the outer sidewall of the frame unit, and the heat dissipation holes are respectively formed between the end baffle and the intermediate baffle and/or between two intermediate baffles.

5. An OBC transformer, comprising a magnetic core assembly, a coil assembly and the bracket assembly of any one of claims 1 to 4, wherein the magnetic core assembly is connected and disposed in the inner cavity of the frame unit, the coil assembly comprises a primary coil unit and a secondary coil unit, the primary coil unit comprises a first primary coil and a second primary coil which are connected into a whole, the first primary coil and the second primary coil are respectively wound on the outer side wall of the frame unit and are respectively located at two ends of the end baffle and are correspondingly adjacent to the middle baffle, wherein the connection point of the first primary coil and the second primary coil is disposed in the wire passing groove, and the secondary coil unit is wound on the outer side wall of the frame unit and is located between two middle baffles.

6. The OBC transformer of claim 5, wherein the core assembly comprises two end cores, at least one leg, and at least two air-gap shims, wherein the air-gap shims are disposed between the legs and the end cores or between two adjacent legs, the legs each being disposed between two of the end cores.

7. The OBC transformer of claim 6, wherein two of the end cores are UU-type cores, and wherein the core assembly comprises at least two of the magnetic legs and at least four of the air gap shims.

8. The OBC transformer according to claim 6 or 7, wherein the air gap gasket is a ceramic sheet with holes.

9. The OBC transformer of claim 5, further comprising a heat conducting assembly comprising a plurality of heat conducting blocks, wherein the plurality of heat conducting blocks are respectively attached to outer sidewalls of the first primary coil, the second primary coil and the secondary coil unit.

10. The OBC transformer according to claim 9, wherein the heat conducting block is a ceramic block.

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