CN212136192U

CN212136192U - Transformer with air duct

Info

Publication number: CN212136192U
Application number: CN202021063361.8U
Authority: CN
Inventors: 张兴胜; 程远
Original assignee: Shenzhen Infy Power Co ltd
Current assignee: Shenzhen Infy Power Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-12-11
Anticipated expiration: 2030-06-10

Abstract

The utility model provides a transformer with wind channel, including at least one magnetic core and solenoid, the magnetic core includes main core leg and at least one side core leg, the side core leg set up in the side of main core leg, the solenoid cover is located on the main core leg, the solenoid with be provided with the wind channel between the side core leg. The solenoid is sleeved on the main magnetic core column, and an air duct is arranged between the solenoid and the side magnetic core column. When the transformer works, the side magnetic core column is not in contact with the coil, so that the heat dissipation area is increased. When the transformer works, the temperature is kept in a constant interval, the insulating layer cannot be damaged due to overhigh temperature, and the service life and the safety of the transformer are further prolonged.

Description

Transformer with air duct

Technical Field

The utility model belongs to the technical field of power electronic equipment technique and specifically relates to indicate a transformer with wind channel.

Background

In the field of industrial application, the output power and power density of power supplies are continuously increased, and meanwhile, higher requirements are also placed on the working environment temperature. The national standard 'dry type transformer' GB6450-1986 makes a regulation on the temperature rise limit value of the dry type transformer, and when insulating materials of different grades are adopted, the limit working temperature and the maximum temperature rise are correspondingly regulated. In the actual use, when the temperature is higher, insulating material can suffer serious destruction, can shorten the life of transformer, even directly burns out the transformer. Some electrical equipment, such as charging power supplies of electric automobiles, require constant power output at a working environment temperature of 55 ℃ or even above, which is also a great test for the heat dissipation design of internal devices of the power supplies. Therefore, it is urgently needed to solve the problem of heat dissipation performance of the transformer, so that the transformer can work well on the premise of not changing the size specification.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provided is a transformer with good heat dissipation performance.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a transformer with wind channel, includes at least one magnetic core and solenoid, the magnetic core includes main core leg and at least one side core leg, the side core leg set up in the side of main core leg, the solenoid cover is located on the main core leg, the solenoid with be provided with the wind channel between the side core leg.

Further, the magnetic core is EE type magnetic core or EI type magnetic core, the quantity of side magnetic core post is two, two the side magnetic core post with all be provided with the wind channel between the solenoid.

Further, the width of the air duct is larger than or equal to 1 mm.

Furthermore, at least one medium strip is arranged in the air duct, and the width of the medium strip is consistent with the inner width of the air duct.

Furthermore, the dielectric strip is made of an insulating material or a material with an insulating layer arranged on the surface.

Further, the number of the magnetic cores is less than or equal to five, and the magnetic cores are arranged in parallel.

Further, still include the base, the base set up in the bottom of magnetic core.

The beneficial effects of the utility model reside in that: the solenoid is sleeved on the main magnetic core column, and an air duct is arranged between the solenoid and the side magnetic core column. When the transformer works, the side magnetic core column is not in contact with the coil, so that the heat dissipation area is increased. When the transformer works, the temperature is kept in a constant interval, the insulating layer cannot be damaged due to overhigh temperature, and the service life and the safety of the transformer are further prolonged.

Drawings

The specific structure of the present invention is detailed below with reference to the accompanying drawings:

fig. 1 is a front view of the present invention;

fig. 2 is a side view of the present invention;

fig. 3 is a front view of the EE type magnetic core of the present invention.

In the figure: 1-magnetic core, 11-main magnetic core column, 12-side magnetic core column, 13-end connecting piece, 2-coil, 3-air duct, 4-dielectric strip and 5-base.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1 to 3, the present invention provides a transformer with an air duct, which includes a magnetic core 1 and a plurality of coils 2, and when the number of the magnetic cores 1 is plural, the magnetic cores may be connected in parallel. In this embodiment, one magnetic core 1 is used to describe its operation principle. The magnetic core 1 comprises a main core leg 11 and at least one side core leg 12, the side core leg 12 is arranged on the side surface of the main core leg 11, and the main core leg 11 is connected with the side core leg 12 through an end connecting piece 13. The coil package 2 is sleeved on the main magnetic core column 11, and corresponding coils are wound in the coil package 2 according to the working performance requirement. The outside of the coil 2 is provided with an insulating envelope for preventing rainwater, water vapor and the like from damaging the coil in the coil 2 and preventing the short circuit of the coil from influencing the service life of the transformer. The eddy current that takes place in the magnetic core 1 leads to the magnetic core 1 temperature to rise, and the copper wire in the solenoid 2 also can have the production of heat because of the resistance exists, and the transformer is at the during operation, and the heat lasts to give off, if the heat can not in time give off, will lead to transformer self temperature to last to rise, until the insulating layer destruction. At this time, the coil 2 is short-circuited, and the whole transformer cannot continue to work. In order to solve the problem, the utility model discloses in, be provided with wind channel 3 between side core post 12 and solenoid, wind channel 3 can guarantee to keep completely cutting off and leaving certain space between side core post 12 and the solenoid 2. When the transformer works, the temperature is kept in a constant interval, the coil 2 cannot be damaged due to overhigh temperature, and the service life and the safety of the transformer are further prolonged.

Specifically, in this embodiment, EE type magnetic core or EI type magnetic core is used to magnetic core 1, and the quantity of side core post 12 is two, and symmetric distribution all is provided with wind channel 3 in the both sides of main core post 11 between two side core posts 12 and solenoid 2, can follow both sides and evenly dispel the heat. Of course, the type of the magnetic core 1 is not limited to the EE type magnetic core or the EI type magnetic core, and may be a UU type magnetic core, a rounded UU type magnetic core, a toroidal core leg, or the like. Preferably, in the present embodiment, the width of the air duct 3 is at least 1mm, so as to ensure sufficient heat dissipation space and ensure heat dissipation efficiency. In some arrangements, the width of the air duct 3 may be less than 1mm when the heat dissipation function is satisfied.

Further, in order to ensure that the air duct 3 can keep its ventilation state when in use and the width of the air duct 3 is not reduced, the medium strips 4 are arranged in the air duct 3, the number of the medium strips 4 is at least 1, and the width of the medium strips 4 is consistent with the inner width of the air duct 3. The dielectric strips 4 are used for maintaining the width of the air duct 3, and the width of the air duct 3 is kept unchanged in the whole using process of the transformer, so that the heat dissipation efficiency and the heat conduction performance are ensured. In use, the dielectric strips 4 are arranged in the air duct 3, and the number and the positions of the dielectric strips 4 are set as required. Preferably, the dielectric strip 4 is made of an insulating material or a material with an insulating layer disposed on the surface, such as rubber, plastic, glass, asbestos, or insulating paint, so as to avoid affecting the working performance of the transformer after short circuit.

Further, the magnetic core 1 determines the working frequency of the transformer, different magnetic core materials can be selected to change the working frequency, and the working frequency of the transformer can also be increased by adopting a mode of connecting a plurality of groups of magnetic cores 1 in parallel. In the embodiment, the three magnetic cores 1 are connected in parallel, so that the working frequency of the transformer is increased, and the higher the frequency is, the higher the efficiency of energy transmission of the transformer is. When multiple groups of magnetic cores 1 are connected in parallel, the number of the magnetic cores 1 is less than or equal to five groups. Specifically, the EE type magnetic core adopts EE70, but of course, other types can be adopted. Appropriate gaps can be arranged among the plurality of magnetic cores 1, and the heat dissipation capacity can be further increased.

In the use, the transformer needs to be placed on the ground or a workbench, so that the base 5 can be arranged on the transformer, and the base 5 is arranged at the bottom of the magnetic core 1 to prevent the magnetic core 1 from directly contacting with the ground.

To sum up, the utility model provides a transformer with wind channel, the main core leg is located to the solenoid cover, is provided with the wind channel between solenoid and side core leg. When the transformer works, the side magnetic core column is not in contact with the coil, so that the heat dissipation area is increased. When the transformer works, the temperature is kept in a constant interval, the insulating layer cannot be damaged due to overhigh temperature, and the service life and the safety of the transformer are further prolonged. The medium strips are arranged in the air duct, so that the width of the air duct is ensured not to be changed, and the heat dissipation efficiency and the heat conduction performance are ensured. The magnetic cores can adopt a plurality of parallel connection forms, so that the working frequency of the transformer is increased, and the energy transmission efficiency is increased.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a transformer with wind channel, includes at least one magnetic core and solenoid, the magnetic core includes main core leg and at least one side core leg, the side core leg set up in the side of main core leg, its characterized in that: the solenoid is sleeved on the main magnetic core column, and an air channel is arranged between the solenoid and the side magnetic core column.

2. The transformer with air duct of claim 1, wherein: the magnetic core is EE type magnetic core or EI type magnetic core, the quantity of side magnetic core post is two, two the side magnetic core post with all be provided with the wind channel between the solenoid.

3. The transformer with air duct of claim 2, wherein: the width of the air duct is more than or equal to 1 mm.

4. The transformer with air duct of claim 3, wherein: at least one medium strip is arranged in the air duct, and the width of the medium strip is consistent with the inner width of the air duct.

5. The transformer with air duct of claim 4, wherein: the dielectric strip is made of an insulating material or a material with an insulating layer arranged on the surface.

6. The transformer with air duct according to any of claims 2-5, wherein: the number of the magnetic cores is less than or equal to five, and the magnetic cores are arranged in parallel.

7. The transformer with air duct of claim 1, wherein: still include the base, the base set up in the bottom of magnetic core.