CN210429446U

CN210429446U - High-power resistor

Info

Publication number: CN210429446U
Application number: CN201921635834.4U
Authority: CN
Inventors: 吴作金
Original assignee: Taizhou Ai Saikang Electronic Co Ltd
Current assignee: Taizhou Ai Saikang Electronic Co Ltd
Priority date: 2019-09-28
Filing date: 2019-09-28
Publication date: 2020-04-28
Anticipated expiration: 2029-09-28

Abstract

The utility model discloses a high-power resistor, relate to the electronic technology, a bulky problem for solving ordinary high-power resistor, including the metal substrate, arrange the copper-clad wire section on the metal substrate, install the chip resistor on the metal substrate, the surface that the metal substrate is provided with copper-clad wire section is coated with the insulating film, the fretwork is provided with two at least termination points that let copper-clad wire section be the exposure state on the insulating film, chip resistor carries out the electrical contact through termination point and copper-clad wire section, connect through chip resistor between two adjacent copper-clad wire sections, and form closed loop through copper-clad wire section interconnect between all chip resistors; the resistor formed by combining the resistor elements with smaller volumes in a patch mode can ensure the power density of the resistor, and meanwhile, the volume of the resistor can be greatly reduced, so that the resistor can be adapted to electric products with more sizes and specifications, and the purpose of expanding the application range of the resistor is achieved.

Description

High-power resistor

Technical Field

The utility model relates to the field of electronic technology, in particular to high-power resistor.

Background

In the field of electronics, resistors are the most commonly used elements, which mainly play a role in limiting the passage of current in a circuit, generally denoted by symbol R, and are formed by a resistor body, a skeleton and a terminal, which play a crucial role in the operational safety of the circuit.

At present, the chinese utility model patent that the publication number is CN205248016U discloses a take resistor of flank water conservancy diversion function, including the resistance box, be equipped with the louvre on the curb plate of resistance box, still including locating the kuppe on the curb plate, the kuppe sets up along the topside of the curb plate of taking the louvre, the kuppe bottom surface is equipped with the opening that is used for making hot-air downward flow.

In general, a resistor generates heat in a using process, and the resistor with higher power density generates more heat in the using process, in order to ensure the safety of the resistor, the volume of the resistor needs to be increased to increase the heat dissipation area of the resistor, or a diversion heat dissipation structure is arranged on a resistor box to enhance the heat dissipation performance of the resistor, as in the above resistor, but in this form, the volume of the resistor body is still larger, and the resistor is difficult to adapt to an electric product with smaller volume for use, so that the application range of the resistor is narrow.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-power resistor can reduce the volume of resistor, makes its use that can adapt to more electrical products to reach the purpose that enlarges resistor application scope.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a high-power resistor, includes metal substrate, arranges on metal substrate and each other not continuous cover copper wire section, installs the chip resistor on metal substrate, metal substrate is provided with the surface coating that covers copper wire section and has the insulating film, the fretwork is provided with two at least and lets cover copper wire section be the wiring point that exposes the state on the insulating film, chip resistor carries out the electrical contact through wiring point and cover copper wire section, connects through chip resistor between two adjacent cover copper wire sections, and forms closed loop through covering copper wire section interconnect between all chip resistors.

By adopting the scheme, the volume of the chip resistor is very small, the size can be nearly 1mm, and the heat transfer efficiency of the metal substrate is much higher than that of a glass fiber plate, so that the chip resistor can play a good heat dissipation effect only by being matched with a heat dissipation fin when in use; meanwhile, the two stages of the chip resistors are respectively connected with the two adjacent copper-clad wire sections, so that the chip resistors positioned between the two adjacent copper-clad wire sections are in a series state, the structure can minimize the distance between the chip resistors, reduce the inductance value when the resistor is electrified, reduce the power loss of the resistor and improve the power density of the resistor.

The utility model discloses a further set up to: the metal substrate is provided with annular closed barrier bars which are connected end to end, the chip resistors and the copper-clad conductor sections are all located in a space range defined by the barrier bars, and the space defined by the barrier bars, which is located on the metal substrate, is filled with insulating silica gel.

Through adopting above-mentioned scheme, the jube strip is used for intercepting it when insulating silica gel fills, prevents that it from overflowing, and insulating silica gel is then to the circuit protection, prevents the emergence of electric leakage, electric shock accident to make the use of this kind of resistor safer.

The utility model discloses a further set up to: at least two leading-out end lines electrically connected with the copper-clad conductor sections are arranged on the metal substrate, and the two leading-out end lines are respectively connected with the copper-clad conductor sections on the two sides.

By adopting the scheme, the combination of the whole metal substrate and the chip resistor is used as a complete resistor, and the leading-out terminal wire is used as a terminal when the resistor is used, so that the resistor is conveniently connected with other elements, and the resistor can be connected to a larger circuit to form a loop.

The utility model discloses a further set up to: the metal substrate is provided with at least two leading-out terminals electrically connected with the copper-clad conductor sections, the two leading-out terminals are respectively connected with the copper-clad conductor sections on the two sides, and the leading-out terminals are provided with wiring threaded holes.

By adopting the scheme, the leading-out terminal and the leading-out terminal wire have the same function and are used as media for connecting other elements or circuits, and the leading-out terminal wire is more convenient in form compared with the leading-out terminal wire, and a lead can be fixed on the resistor in a screw connection mode, so that the resistor is more convenient to mount when in use.

The utility model discloses a further set up to: the surface that the metal substrate is provided with the copper-clad conductor section is fixed with insulating safety cover, be provided with two at least leading-out terminals that cover the copper conductor section electricity on the metal substrate and be connected or two at least leading-out terminal lines that cover the copper conductor section electricity on the metal substrate on the insulating safety cover, just set up connecting thread hole on the leading-out terminal.

By adopting the scheme, the insulating protective cover is used for further protecting the resistor, and the leading-out terminal or the leading-out terminal line is used for enabling the resistor to be connected with other elements or circuits when in use, so that the resistor is convenient to use.

The utility model discloses a further set up to: and the metal substrate or the insulating protective cover is provided with a positioning threaded hole for conveniently fixing the resistor during installation.

Through adopting above-mentioned scheme, the screw hole can supply the screw to pass when the resistor installation, conveniently fixes the resistor through the screw like this to prevent that it from taking place to drop in application process.

To sum up, the utility model discloses following beneficial effect has:

1. the resistor formed by combining the resistor elements with smaller volumes in a patch mode can ensure the power density of the resistor, and can greatly reduce the volume of the resistor, so that the resistor can be adapted to electric products with more sizes and specifications, and the purpose of expanding the application range of the resistor is achieved;

2. the partition bars can form partitions on the metal substrate, so that the insulating silica gel is not easy to overflow and scatter out during filling, and the filling of the insulating silica gel can be more uniform;

3. the leading-out terminal or the leading-out terminal can be used for conveniently connecting the resistor with other elements or circuits, so that the portability of the resistor in use is improved.

Drawings

FIG. 1 is a schematic diagram of a basic structure of a metal substrate according to the present embodiment;

FIG. 2 is a schematic structural view of a lead-out end line of the metal substrate of this embodiment;

FIG. 3 is a schematic view showing the structure of the metal substrate with a terminal lead-out according to the present embodiment;

fig. 4 is a schematic structural view of the metal substrate with the insulating protective cover according to the present embodiment.

In the figure: 1. a metal substrate; 2. copper-clad wire sections; 21. a wiring point; 3. a chip resistor; 4. a barrier strip; 5. leading out an end wire; 6. a lead-out terminal; 61. connecting the threaded hole; 7. an insulating protective cover; 8. and positioning the threaded hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, a high-power resistor comprises a metal substrate 1, a copper-clad wire segment 2 and a chip resistor 3, wherein metal is selected as the substrate, the good thermal conductivity of the metal is mainly considered, the heat transfer efficiency of the high-power resistor is high, the heat dissipation effect of the resistor is good, and aluminum materials can be selected as the substrate; after the material is selected, a copper-clad process is adopted to cover metal copper on the metal substrate 1 in a block shape, the metal copper is not connected with each other, the covered metal copper is named as a copper-clad conducting wire section 2, and then the surface of the metal substrate 1 covered with the metal copper is coated with insulating paint to form an insulating film.

After the insulating film formed, need to cover copper wire section 2 position fretwork at each piece and carve out two at least wiring points 21, chip resistor 3 adopts the paster technology to install in wiring point 21 department and cover copper wire section 2 and form the electrical contact, cover between the copper wire section 2 adjacent two and form the electricity through chip resistor 3 and connect, it has a plurality of chip resistor 3 to cover to distribute along its length direction on the copper wire section 2 same, it establishes ties each other between the same row of chip resistor 3 between the copper wire section 2 adjacent two, and connect in parallel each other between the adjacent two rows of chip resistor 3 that the interval set up, all chip resistor 3 all install the back, chip resistor 3 and cover copper wire section 2 form interconnect's closed loop on metal substrate 1.

As shown in fig. 2, in consideration of the fact that the metal substrate 1 is exposed after the electric resistance welding, and is easily affected by moisture and the like, the barrier ribs 4 protruding from the surface of the metal substrate 1 may be welded to the metal substrate 1. Iron wire or other strip article can be selected for use to separate barrier strip 4, and its end to end forms the closed loop after the complete round in border around metal substrate 1, and chip resistor 3 all lies in the space range that separates barrier strip 4 and surround formation with covering copper wire section 2, and metal substrate 1 is located to separate the space intussuseption that barrier strip 4 formed and is filled with insulating silica gel.

In order to facilitate the installation of the resistor, leading-out terminal wires 5 electrically connected with the copper-clad conductor sections 2 are welded on the metal substrate 1, the two leading-out terminal wires 5 are used as the positive electrode and the negative electrode of the resistor, and the two leading-out terminal wires 5 are respectively connected with the copper-clad conductor sections 2 on the two sides.

As shown in fig. 3, the positive and negative electrodes are not limited to the lead wires 5, but may be in other forms, for example, the lead terminals 6 electrically connected to the copper-clad wire segments 2 are welded to the metal substrate 1, the lead terminals 6 are bridged onto the metal substrate 1, the two lead terminals 6 are respectively connected to the copper-clad wire segments 2 on both sides, and the lead terminals 6 are provided with connection screw holes 61 for facilitating external wire bonding.

As shown in fig. 4, in consideration of circuit sealing performance and safety, an insulating protective cover 7 may be further fixed to the side of the metal substrate 1 where the copper-clad wire segment 2 is disposed, and similarly, for convenience of installation, the leading terminal 6 or the leading terminal wire 5 on the metal substrate 1 is disposed through the insulating protective cover 7 and exposed to the outside of the insulating protective cover 7, so that positive and negative contacts which are easily distinguished are formed on the resistor.

The resistor is usually used in combination with other elements, and in order to prevent the resistor from falling off during installation, positioning threaded holes 8 which are mutually communicated are formed in the insulating protective cover 7 and the metal substrate 1 so as to allow screws to pass through the positioning threaded holes to fix the resistor during application.

The specific implementation process comprises the following steps: after the chip resistor 3 is compounded on the metal substrate 1 in a chip form, firstly, the size of the chip resistor 3 is small and exquisite, compared with the traditional high-power resistor (such as a corrugated resistor), the chip resistor can achieve the same power with smaller size, or more chip resistors 3 are compounded in the same size range to obtain larger power density, so that the resistor can be suitable for being adapted to more electrical equipment, and the purpose of expanding the application range of the resistor is achieved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A high power resistor characterized by: including metal substrate (1), arrange on metal substrate (1) and the copper-clad wire section (2) that are not mutually connected, install chip resistor (3) on metal substrate (1), metal substrate (1) is provided with the surface coating that covers copper wire section (2) and has the insulating film, the fretwork is provided with two at least and lets cover copper wire section (2) and be wiring point (21) of exposing the state on the insulating film, chip resistor (3) carry out the electrical contact through wiring point (21) and copper-clad wire section (2), and two adjacent copper-clad wire sections (2) are connected through chip resistor (3), and form closed loop through copper-clad wire section (2) interconnect between all chip resistor (3).

2. A high power resistor according to claim 1, wherein: be annular confined at a distance from rail strip (4) after being provided with end to end on metal substrate (1), chip resistor (3) all are located the space range that encloses at a distance from rail strip (4) with covering copper wire section (2), and metal substrate (1) is located the space intussuseption that encloses at a distance from rail strip (4) and is filled with insulating silica gel.

3. A high power resistor according to claim 2, wherein: the metal substrate (1) is provided with at least two leading-out end lines (5) electrically connected with the copper-clad conductor sections (2), and the two leading-out end lines (5) are respectively connected with the copper-clad conductor sections (2) on the two sides.

4. A high power resistor according to claim 2, wherein: the copper-clad wire connecting structure is characterized in that at least two leading-out terminals (6) electrically connected with the copper-clad wire sections (2) are arranged on the metal substrate (1), the two leading-out terminals (6) are respectively connected with the copper-clad wire sections (2) on the two sides, and wiring threaded holes are formed in the leading-out terminals (6).

5. A high power resistor according to claim 1, wherein: the surface that metal substrate (1) was provided with copper-clad wire section (2) is fixed with insulating safety cover (7), be provided with on insulating safety cover (7) at least two leading-out terminal (6) of being connected with copper-clad wire section (2) electricity on metal substrate (1) or at least two leading-out terminal line (5) of being connected with copper-clad wire section (2) electricity on metal substrate (1), just set up connecting thread hole (61) on leading-out terminal (6).

6. A high power resistor according to any one of claims 2 or 5, wherein: and a positioning threaded hole (8) for conveniently fixing the resistor during installation is formed in the metal substrate (1) or the insulating protective cover (7).