KR20180100825A - Transformer - Google Patents

Abstract

Disclosed is a transformer which can increase a voltage of a vehicle battery while increasing a spatial distance and a creeping distance without increasing a size of the transformer. The transformer comprises: a core body; and a bobbin member arranged inside the core body, and separately forming a first coil winding unit winding a first coil and a second coil winding unit winding a second coil by having a section unit therebetween. The section unit can form a channel space dented to a winding surface side of the first and second coil winding units.

Description

Transformer {TRANSFORMER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle for an environment friendly vehicle, and more particularly, to a transformer provided in an OBC and an LDC of an environmentally friendly vehicle electric system.

Generally, instead of an alternator (generator) of a gasoline / diesel vehicle, a low-dc / dc converter (LDC) is used instead of an alternator of a gasoline / diesel vehicle, such as a hybrid vehicle (HEV or PHEV), an electric vehicle . The LDC takes charge of the vehicle's high-voltage battery and charges the 12V lead acid battery.

In addition, the PHEV or EV vehicle is equipped with an on-board charger (OBC) as a vehicle-mounted charger for charging a high voltage battery for a vehicle. The OBC takes charge of the commercial high voltage battery (for example, 220V / 60Hz) as the input.

These LDCs and OBCs are essential components for eco-friendly automobiles. Their common feature is that they have a transformer for insulation. In other words, the LDC requires a transformer for isolation between high-12V and the OBC requires a transformer for isolation between commercial and high voltage.

The insulation specifications related to the transformer should satisfy both clearance and creepage between the two electrodes. The space distance and the creepage distance specification in proportion to the voltage applied to the primary / secondary terminals of the transformer .

Recently, a method of increasing the voltage of a vehicle battery has been emerging as a method for improving the efficiency of LDC and OBC. For example, if the voltage of the battery is increased by a factor of two, the current flowing through the electrical system is reduced by half and the conduction loss is reduced by a factor of four on the same output power basis. Accordingly, the efficiency of the electrical system can be increased as the conduction loss is reduced. When using the device and the conductor having large conduction resistance, it is possible to reduce the size and the material cost of the electrical system.

However, as the voltage of the automotive battery increases, the space distance and the creepage distance between the primary and secondary coils of the transformer and the housing must be increased. To do this, the thickness of the barrier tape or bobbin for insulation of the primary / The size and the material cost of the transformer are increased.

The matters described in the background section are intended to enhance the understanding of the background of the invention and may include matters not previously known to those skilled in the art.

Embodiments of the present invention provide a transformer capable of increasing a space distance and a creepage distance without increasing the size of a transformer and increasing a voltage of a vehicle battery.

A transformer according to exemplary embodiments of the present invention includes a core body, a first coil winding portion which is disposed inside the core body and in which a primary coil is wound with a section portion sandwiched therebetween, and a second coil And the bobbin member defining the winding portion, wherein the section portion can form a channel space recessed into the winding surface side of the first and second coil winding portions.

Further, in the transformer according to the embodiment of the present invention, the section portion may include a first diaphragm extending outward from the winding surface of the first coil winding portion, and a second diaphragm extending outwardly from the winding surface of the second coil winding portion And a second diaphragm spaced from the first diaphragm and defining the channel space.

A transformer according to an embodiment of the present invention includes a core body, a first coil winding portion disposed inside the core body and having a primary winding wound around the first winding portion and a second coil wound around the secondary winding, And a bobbin member forming a winding section, wherein the section is provided so as to extend outside the outer periphery of the winding surface of the first and second coil winding sections and is concave in the winding surface side of the first and second coil winding sections And an insert which forms a channel space and has sidewalls facing the winding surfaces of the first and second coil windings and fits into the channel space.

Further, in the transformer according to the embodiment of the present invention, the insert is fitted in the channel space between the first and second diaphragms, and can support the core body through the side wall.

In addition, in the transformer according to the embodiment of the present invention, the insert has a first portion inserted into the channel space, and a second portion extending from the outer edge of the first portion along the first and second coil- And a second portion forming the sidewall connected to the second portion.

Further, in the transformer according to the embodiment of the present invention, the bobbin member may include the first and second coil windings which are mutually separable.

Further, in the transformer according to an embodiment of the present invention, the bobbin member may include an inner wall surface coupled to the first and second coil winding portions and connected to the winding surfaces of the first and second coil winding portions, .

Further, in the transformer according to the embodiment of the present invention, the first portion of the insert may be disposed between the first and second diaphragms with the first and second coil winding portions separated.

Further, in the transformer according to an embodiment of the present invention, the first and second coil winding portions may be coupled to each other through a core cover coupled to an upper end of the core body.

A transformer according to an embodiment of the present invention includes a core body, a first coil winding portion disposed inside the core body and having a primary winding wound around the first winding portion and a second coil wound around the secondary winding, And a bobbin member forming a winding section, wherein the section extends outwardly in the outer periphery between the first and second coil winding sections and is bent perpendicularly to either one of the first and second coil winding sections Section ribs.

Further, in the transformer according to the embodiment of the present invention, the section rib may include a first rib that is divided into a primary coil wound on the first coil winding part and a secondary coil wound on the second coil winding part And a second rib that is bent perpendicularly to one of the first and second coil windings at an outer edge of the first rib.

Further, in the transformer according to the embodiment of the present invention, the first coil winding part forms the section rib, and may be provided so as to be separable from the second coil winding part.

Further, in the transformer according to the embodiment of the present invention, the first coil winding portion forms the section rib, the second coil winding portion is inserted into the second rib, and the second coil winding portion is coupled to the first rib So that an insertion rib can be formed.

Also, in the transformer according to the embodiment of the present invention, the second coil winding part forms the section rib, and may be provided so as to be separable from the first coil winding part.

Further, in the transformer according to an embodiment of the present invention, the first coil winding part may be inserted into the second rib and form an insertion rib to be coupled with the first rib.

Further, in the transformer according to an embodiment of the present invention, the first and second coil winding portions may be coupled to each other through a core cover coupled to an upper end of the core body.

Since the embodiment of the present invention can increase the space distance and the creepage distance without increasing the size of the transformer, it is possible to reduce the size, material cost, etc. of the transformer compared to the conventional structure and increase the voltage of the vehicle battery.

In addition, effects obtainable or predicted by the embodiments of the present invention will be directly or implicitly disclosed in the detailed description of the embodiments of the present invention. That is, various effects to be predicted according to the embodiment of the present invention will be disclosed in the detailed description to be described later.

These drawings are for the purpose of describing an embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a view schematically showing a transformer according to a first embodiment of the present invention.
2 is a view schematically showing a transformer according to a second embodiment of the present invention.
3 is a view schematically showing a transformer according to a third embodiment of the present invention.
4 is a view showing a bobbin member applied to a transformer according to a third embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

In the following detailed description, the names of components are categorized into the first, second, and so on in order to distinguish them from each other in the same relationship, and are not necessarily limited to the order in the following description.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", "unit of means "," part of item ", "absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

1 is a view schematically showing a transformer according to a first embodiment of the present invention.

1, a transformer 100 according to an embodiment of the present invention can be applied to an electric system of an environmentally friendly vehicle such as a hybrid vehicle (HEV or PHEV), an electric vehicle (EV), and a fuel cell EV have.

Further, the transformer 100 according to the embodiment of the present invention is provided in an LDC (Low-DC / DC Converter) and an OBC (On-Board Charger) of an environmentally friendly vehicle electrical system. In LDC, Transformers are required for insulation, and OBCs require voltage to isolate between commercial and high voltage.

However, it should not be understood that the protection scope of the present invention is limited to the transformer employed in the electric system of the environmentally friendly vehicle as described above, and the transformer employed in the electric system of various kinds and fields can be applied to the technical idea of the present invention .

Here, the transformer 100 is typically wound inside the core such that the primary coil 1 and the secondary coil 2 are insulated from each other through a bobbin. The bobbin includes a primary coil 1 and a secondary coil 2, And an insulating barrier for insulating the substrate 2.

The transformer 100 according to the embodiment of the present invention has a structure capable of securing clearance and creepage without increasing the size of the transformer and increasing the voltage of the vehicle battery.

The clearance distance can be defined as a distance between the primary coil 1 and the secondary coil 2 as a conductor and the creepage distance can be defined as a distance between the primary coil 1 and the secondary coil 2 via an insulating barrier or an air gap As shown in Fig.

The transformer 100 according to the embodiment of the present invention basically includes a core body 10 and a bobbin member 30 disposed inside the core body 10. The bobbin member 30 is a bobbin member. The core body 10 surrounds the bobbin member 30 and the bobbin member 30 is disposed inside the core body 10 and the core cover 11 is coupled to the upper end of the core body 10.

In the embodiment of the present invention, the bobbin member 30 is for winding the primary coil 1 and the secondary coil 2 and for mutually insulating the primary and secondary coils 1 and 2, It is made of material.

The bobbin member 30 has a hollow inside and has an upper side supporting the upper portion of the core body 10 and a lower side supporting the lower portion of the core body 10, . The bobbin member 30 may be fixed by a core cover 11 coupled to an upper end of the core body 10 while being disposed inside the core body 10.

The bobbin member 30 includes a first coil winding portion 41 formed on the upper side of the section 31 as an insulating barrier as described above and a second coil winding portion 42 formed on the lower side thereof .

Here, the primary coil 1 is wound on the first coil winding part 41 and the secondary coil 2 is wound on the second coil winding part 42. The first and second coil winding portions 41 and 42 may be integrally connected to each other or may be provided separately from each other.

In the embodiment of the present invention, the section 31 is formed to extend outside the outer periphery of the winding surface of the first and second coil winding sections 41, 42 as a predetermined thickness (for example, the thickness of the existing section section) .

Furthermore, the section 31 forms a channel space 33 recessed into the winding surface side of the first and second coil winding sections 41 and 42 in the embodiment of the present invention. The channel space 33 is provided as a space in which the central portion of the section 31 is removed.

Specifically, the section 31 includes a first diaphragm 35 extending outward from the winding surface of the first coil winding section 41, and a second diaphragm 35 extending outward from the winding surface of the second coil winding section 42 And a second diaphragm 37 extending from the first diaphragm 35 and forming the above-mentioned channel space 33.

Therefore, in the transformer 100 according to the first embodiment of the present invention, when the thickness of the section 31 is the same as the thickness of the existing section, the clearance is the same as before, The creeping distance can be increased rapidly.

Thus, in the embodiment of the present invention, the creepage distance can be increased without increasing the size of the transformer through the channel space 33 of the section 31, so that the size and material cost of the transformer compared to the conventional structure can be reduced, The voltage can be increased.

2 is a view schematically showing a transformer according to a second embodiment of the present invention.

Referring to FIG. 2, the transformer 200 according to the second embodiment of the present invention is based on the construction of the electric embodiment, and has a structure in which the side wall of the transformer 200 facing the winding surface of the first and second coil- 53 inserted in the channel space 33 of the section portion 31. The insertion portion 50 is formed in a rectangular shape.

In an embodiment of the invention, the insert (50) is provided with an additional bobbin body which is coupled to the channel space (33) of the section (31). The insert 50 is fitted in the channel space 33 between the first and second diaphragms 35 and 37 of the section 31 and supports the core body 10 through the side wall 53.

The insert 50 includes a first portion 51 inserted into the channel space 33 between the first and second diaphragms 35 and 37 of the section 31, And a second portion 52 connected in the vertical direction along the first and second coil winding portions 41 and 42 at the edge.

The second portion 52 is integrally connected to the first portion 51 and has a first and a second coil winding portions 41 and 42 on the outside between the first and second winding portions 41 and 42 In the direction of the winding surface. The second portion 52 includes a primary coil 1 disposed on the first diaphragm 35 and a side wall 53 having a height supporting the secondary coil 2 disposed on the second diaphragm 37. [ .

The first and second coil winding portions 41 and 42 are provided to be separable from each other with respect to the channel space 33 of the section 31. The first and second coil winding portions 41 and 42 are coupled to each other, A wall surface is formed in the channel space 33.

Here, the first portion 51 of the insert 50 is divided into the first and second diaphragms 35 and 37 of the section 31 in a state in which the first and second coil winding portions 41 and 42 are separated from each other. . The first and second coil winding portions 41 and 42 are coupled to each other through the core cover 11 coupled to the upper end of the core body 10.

That is, the first portion 51 of the insert 50 is connected to the first and second diaphragms 35 and 37 of the section 31 by coupling the first and second coil winding portions 41 and 42, In the channel space 33 between the first and second channels.

The reason for configuring the first and second coil winding portions 41 and 42 of the bobbin member 30 to be separable from each other as described above is that the coil spring portions 41 and 42 of the bobbin member 30 are separated from each other in the channel space 33 of the section portion 31 1 portion 51 in the first embodiment.

The first and second coil windings 41 and 42 are separated from each other so that the primary coil 1 and the secondary coil 2 are respectively wound and the first and second coil windings 41 and 42 A first part 51 of the insert body 50 is disposed between the first and second diaphragms 35 and 37 and is disposed inside the core body 10 and is connected to the upper end of the core body 10, Can be coupled to each other by the cover 11.

The transformer 200 according to the second embodiment of the present invention includes the insert 50 inserted into the channel space 33 of the section 31, The same space distance and the creepage distance can be increased sharply by the second portion 52 of the first and second portions 50,

The rest of the configuration and effects of the transformer 200 according to the second embodiment of the present invention as described above are the same as those in the electric embodiment, and a detailed description thereof will be omitted.

3 is a view schematically showing a transformer according to a third embodiment of the present invention.

3, a transformer 300 according to a third embodiment of the present invention includes a transformer 300 extending outwardly from the first and second coil windings 41 and 42 and including first and second coil windings The section section 131 having the section ribs 60 bent perpendicularly to either one of the side walls 41,

The section rib 60 includes a first coil 1 wound around the first coil winding part 41 and a first rib 61 wound around the second coil 2 wound around the second coil winding part 42 And a second rib 62 bent perpendicularly to the first coil winding portion 41 side (upper side) of the first and second coil winding portions 41 and 42 at the outer edge of the first rib 61, . Here, the second rib 62 is provided as a wall facing the winding surface of the first coil winding part 41.

The first and second coil winding portions 41 and 42 are separable from each other as shown in FIG. 4, and the second coil winding portion 42 has a section rib 60 formed at an upper end thereof And the first coil winding part 41, as shown in Fig.

The lower end of the first coil winding part 41 is inserted into the second rib 62 to form an insertion rib 63 to be coupled with the first rib 61. The first and second coil winding portions 41 and 42 are coupled to each other through the core cover 11 coupled to the upper end of the core body 10.

The reason for configuring the first and second coil winding portions 41 and 42 of the bobbin member 30 so that they can be separated from each other is that the first and second coil winding portions 41 and 42, The primary coil 1 and the secondary coil 2 are wound around each other to prevent interference.

That is, the first and second coil windings 41 and 42 are separated from each other and are wound around the core body 10 after the primary coil 1 and the secondary coil 2 are respectively wound. And can be coupled to each other by a core cover 11 coupled to the upper end of the core body 10.

Therefore, the transformer 300 according to the third embodiment of the present invention has the above-described section 131 having the section ribs 60, The same clearance distance and creepage distance can be rapidly increased by the second ribs 62.

The rest of the structure and effects of the transformer 300 according to the third embodiment of the present invention are the same as those in the electric embodiment, and thus a detailed description thereof will be omitted.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Other embodiments may easily be proposed by adding, changing, deleting, adding, etc., but this is also within the scope of the present invention.

1 ... primary coil 2 ... secondary coil
10 ... core body 11 ... core cover
30 ... bobbin member 31, 131 ... section
33 ... channel space 35 ... first diaphragm
37 ... second diaphragm 41 ... first coil winding section
42 ... second coil winding part 50 ... insert
51 ... first portion 52 ... second portion
53 ... side wall 60 ... section rib
61 ... first rib 62 ... second rib
63 ... insert rib

Claims (14)

A transformer comprising a core body, a bobbin member arranged inside the core body and defining a first coil winding part wound around a primary coil with a section therebetween and a second coil winding part wound around a secondary coil, In this case,
And the section portion forms a channel space concave on the winding surface side of the first and second coil winding portions. The method according to claim 1,
The section may include:
A first diaphragm extending outwardly from a winding surface of the first coil winding portion,
A second diaphragm extending from the winding surface of the second coil winding portion to the outer side of the outer periphery thereof and spaced apart from the first diaphragm,
≪ / RTI > A transformer comprising a core body, a bobbin member arranged inside the core body and defining a first coil winding part wound around a primary coil with a section therebetween and a second coil winding part wound around a secondary coil, In this case,
The section may include:
And a channel space formed to extend outwardly from an outer periphery of the winding surface of the first and second coil winding portions and recessed toward the winding surface side of the first and second coil winding portions,
And an insert having a sidewall facing the winding surface of the first and second coil windings and being fitted in the channel space. The method of claim 3,
The section may include:
A first diaphragm extending from the winding surface of the first coil winding portion to the outer periphery,
A second diaphragm extending from the winding surface of the second coil winding portion to the outer side of the outer periphery thereof and spaced apart from the first diaphragm,
≪ / RTI > 5. The method of claim 4,
Said insert comprising:
The first and second diaphragms being fitted in a channel space between the first and second diaphragms to support the core body through the side walls. 5. The method of claim 4,
Said insert comprising:
A first portion inserted into the channel space,
A second portion forming the sidewall vertically connected along the first and second coil winding portions at the outer edge of the first portion;
≪ / RTI > The method of claim 3,
The bobbin member
The first and second coil windings being mutually separable,
Wherein the first and second coil winding portions are coupled to form an inner wall surface connected to the winding surfaces of the first and second coil winding portions in the channel space. The method according to claim 6,
Wherein the bobbin member includes the first and second coil windings which are mutually separable,
Wherein the first portion of the insert is disposed between the first and second diaphragms with the first and second coil windings separated. 9. The method according to claim 7 or 8,
Wherein the first and second coil windings comprise:
And are coupled to each other through a core cover coupled to an upper end of the core body. A transformer comprising a core body, a bobbin member arranged inside the core body and defining a first coil winding part wound around a primary coil with a section therebetween and a second coil winding part wound around a secondary coil, In this case,
Wherein the section comprises a section rib extending outwardly outwardly between the first and second coil winding portions and vertically bent into either the first and second coil winding portions. 11. The method of claim 10,
The section rib
A first rib for defining a primary coil wound on the first coil winding part and a secondary coil wound on the second coil winding part,
And a second rib that is bent perpendicularly to one of the first and second coil winding portions at an outer edge of the first rib,
≪ / RTI > 11. The method of claim 10,
Wherein the second coil winding portion forms the section rib, and is separable from the first coil winding portion. 12. The method of claim 11,
Wherein the second coil winding portion forms the section rib and is separable from the first coil winding portion,
Wherein the first coil winding portion is inserted into the second rib and forms an insertion rib to be engaged with the first rib. The method according to claim 12 or 13,
Wherein the first and second coil windings comprise:
And are coupled to each other through a core cover coupled to an upper end of the core body.

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