CN204596603U - Non-contact electric automobile charging pile transformer - Google Patents

Abstract

The non-contact electric vehicle charging pile transformer includes a primary winding assembly and a secondary winding assembly, the primary winding assembly is arranged inside the secondary winding assembly, the primary winding assembly includes a primary winding, a primary skeleton and a center column magnetic core, the The primary winding is wound on the primary bobbin, and the primary winding is set on the center column magnetic core, and the lead-out wire of the primary winding is drawn out from the first outlet notch on the top of the center column magnetic core; the center column magnetic core is inserted into the center of the secondary winding assembly ; The secondary winding assembly includes a secondary winding, a secondary skeleton, an upper magnetic core and a lower magnetic core, the secondary winding is wound on the secondary skeleton, and the secondary winding is sleeved on the secondary winding assembly; The upper magnetic core is set on the top of the secondary frame, and the lower magnetic core is set on the bottom of the secondary frame; the top of the upper magnetic core is provided with a second outlet notch; the non-contact electric vehicle charging pile transformer has good heat dissipation and high power density. High, high efficiency, good consistency of distribution parameters, worthy of vigorous promotion.

Description

Non-contact electric vehicle charging pile transformer

technical field

The utility model relates to the field of transformers, in particular to a non-contact electric vehicle charging pile transformer.

Background technique

With the high frequency, high power density, and high reliability of electronic circuits, especially oil logging equipment, electric vehicle charging piles, etc. have great advantages; with the rapid development of electric vehicles, electric vehicle charging piles will also usher in With great development, it will gradually be built together with gas stations and natural gas stations; for charging piles, it is required to have high electrical safety performance, no sparks, and electric flying. Isolation, anti-spark, corona, etc. In addition, the interface is standardized. Compared with the traditional vehicle-mounted charging pile machine, it can improve the energy transfer efficiency, reduce the magnetic flux leakage interference, and reduce the weight and cost of the electric vehicle itself; the structure of the traditional transformer is complex. Poor consistency, split winding plane winding contact, large magnetic flux leakage, large interference, low energy transfer efficiency, and not conducive to heat dissipation, so it is difficult to achieve the development trend of high frequency, low loss, low interference, and high efficiency.

Utility model content

The utility model aims to provide a non-contact electric vehicle charging pile transformer with good heat dissipation, high power density, high efficiency, good consistency of distribution parameters and a working frequency up to 300kHz.

In order to achieve the above purpose, the utility model provides the following technical solutions: a non-contact electric vehicle charging pile transformer, including a primary winding assembly and a secondary winding assembly, the primary winding assembly is located inside the secondary winding assembly, and the primary winding assembly includes A primary winding, a primary bobbin and a center column magnetic core, the primary winding is wound on the primary frame, the primary winding is set on the center column magnetic core, and the lead-out wire of the primary winding is drawn out from the first outlet notch on the top of the center column magnetic core; The central column magnetic core is T-shaped as a whole, and the central column magnetic core is inserted into the center of the secondary winding assembly; the secondary winding assembly includes a secondary winding, a secondary skeleton, an upper magnetic core and a lower magnetic core. The primary winding is wound on the secondary bobbin, and the secondary winding is set on the secondary winding assembly; the upper magnetic core and the lower magnetic core are pot-like magnetic cores, the upper magnetic core is set on the top of the secondary bobbin, and the lower magnetic core is The magnetic core is sheathed on the bottom of the secondary frame; the top of the upper magnetic core is provided with a second outlet notch, and the lead-out wire of the secondary winding is drawn out from the second outlet notch.

As a further solution of the present utility model: the primary winding assembly is movably connected with the secondary winding assembly.

As a further solution of the present invention: the upper magnetic core and the lower magnetic core are sealed and connected by high-temperature epoxy resin glue.

As a further solution of the present invention: the primary winding and the secondary winding are made of film-coated copper foil, enamelled flat copper strip or insulated enamelled round copper wire.

As a further solution of the present utility model: the materials of the central column magnetic core, the upper magnetic core and the lower magnetic core are ferrite soft magnetic cores.

Compared with the prior art, the beneficial effect of the utility model is that the non-contact electric vehicle charging pile transformer realizes the energy transmission and disconnection function of the transformer through the process of plugging and unplugging the primary winding assembly, which is different from the traditional soft-switching full-bridge power supply. Compared with the traditional transformer, its split structure can effectively reduce the volume and weight of the electric vehicle on-board charger, and can effectively reduce the vehicle cost; the non-contact electric vehicle charging pile transformer has good heat dissipation, high power density, high efficiency, and distributed parameters The consistency is good, and the working frequency can reach 300kHz; the soft-switching full-bridge power supply made of the non-contact electric vehicle charging pile transformer is easy to debug and produce, with good consistency, high production efficiency and stable performance.

Description of drawings

Fig. 1 is a sectional view of the utility model;

Figure 2 is a top view of the upper magnetic core;

Figure 3 is a cross-sectional view of the upper magnetic core;

Figure 4 is a top view of the lower magnetic core;

Figure 5 is a cross-sectional view of the lower magnetic core;

Figure 6 is a top view of the central column magnetic core;

Fig. 7 is a cross-sectional view of the central column magnetic core;

Figure 8 is a top view of the primary skeleton;

Figure 9 is a sectional view of the primary skeleton;

Figure 10 is a top view of the secondary skeleton;

Fig. 11 is a cross-sectional view of the secondary frame.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1-11. In the embodiment of the utility model, the non-contact electric vehicle charging pile transformer includes a primary winding assembly and a secondary winding assembly. The primary winding assembly is arranged inside the secondary winding assembly, and the primary winding assembly and The secondary winding assembly is movably connected, and the primary winding assembly includes a primary winding 1, a primary bobbin 2 and a central column magnetic core 3, the primary winding 1 is wound on the primary bobbin 2, and the primary winding 1 is sleeved on the central column magnetic core 3 , the lead-out line of the primary winding 1 is drawn out from the first outlet notch 4 at the top of the central column magnetic core 3; the central column magnetic core 3 is T-shaped as a whole, and the central column magnetic core 3 is inserted into the center of the secondary winding assembly; The secondary winding assembly includes a secondary winding 5, a secondary skeleton 6, an upper magnetic core 7 and a lower magnetic core 8, the secondary winding 5 is wound on the secondary skeleton 6, and the secondary winding 5 is sleeved on the secondary winding assembly On; the upper magnetic core 7 and the lower magnetic core 8 are pot-like magnetic cores, the upper magnetic core 7 is set on the top of the secondary skeleton 6, the lower magnetic core 8 is set on the bottom of the secondary skeleton 6, and the upper magnetic core 7 and the lower magnetic core 8 are sealed and connected by high-temperature epoxy resin glue, and are ground and clamped with special tooling fixtures to ensure that the breath at the joint is minimal; the top of the upper magnetic core 7 is provided with a second outlet notch 9, and the secondary The lead-out wire of the winding 5 is drawn from the second outlet notch 9; the primary winding 1 and the secondary winding 5 are made of film-coated copper foil, enamelled flat copper strip or a plurality of insulated enamelled round copper wires according to the designed number of turns It is made by winding, which can avoid increasing the effective resistance of the winding and increasing the temperature rise of the winding due to the increase in frequency and the skin effect. This winding can enable the winding to achieve high current density under the same temperature rise, and can be applied to higher Operating frequency, if the winding is coated copper foil or enamelled flat copper strip, it is necessary to remove the insulation layer of the coated copper foil or enamelled flat copper strip and perform soldering, and keep an appropriate length according to the design requirements; The magnetic core 3, the upper magnetic core 7 and the lower magnetic core 8 are all made of ferrite soft magnetic cores with low loss power that can work at 50kHz-300kHz to meet the requirements of high frequency development.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of the required equivalent elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. A non-contact electric vehicle charging pile transformer, comprising a primary winding assembly and a secondary winding assembly, wherein the primary winding assembly is arranged inside the secondary winding assembly, and the primary winding assembly includes a primary winding (1), a primary Skeleton (2) and center post magnetic core (3), the primary winding (1) is wound on the primary skeleton (2), the primary winding (1) is sleeved on the center post magnetic core (3), and the primary winding (1 ) leads out from the first outlet notch (4) at the top of the central column magnetic core (3); the central column magnetic core (3) is T-shaped as a whole, and the central column magnetic core (3) is inserted into the secondary winding assembly center; the secondary winding assembly includes a secondary winding (5), a secondary bobbin (6), an upper magnetic core (7) and a lower magnetic core (8), and the secondary winding (5) is wound on the secondary On the skeleton (6), the secondary winding (5) is sleeved on the secondary winding assembly; the upper magnetic core (7) and the lower magnetic core (8) are both pot-like magnetic cores, and the upper magnetic core (7) Set on the top of the secondary frame (6), the lower magnetic core (8) is set on the bottom of the secondary frame (6); the top of the upper magnetic core (7) is provided with a second outlet notch (9), and the secondary The lead-out wires of the winding (5) are drawn out from the second lead-out notch (9). 2. The non-contact electric vehicle charging pile transformer according to claim 1, characterized in that the primary winding assembly is movably connected with the secondary winding assembly. 3. The non-contact electric vehicle charging pile transformer according to claim 1, characterized in that the upper magnetic core (7) and the lower magnetic core (8) are sealed and connected by high-temperature epoxy resin. 4. The non-contact electric vehicle charging pile transformer according to claim 1, characterized in that, the materials of the primary winding (1) and the secondary winding (5) are film-coated copper foil, enamelled flat copper strip or Insulated enamelled round copper wire. 5. The non-contact electric vehicle charging pile transformer according to claim 1, characterized in that, the materials of the middle column magnetic core (3), the upper magnetic core (7) and the lower magnetic core (8) are all iron Oxygen soft core.