CN218631532U

CN218631532U - High-power resistor

Info

Publication number: CN218631532U
Application number: CN202221994146.9U
Authority: CN
Inventors: 胡紫阳; 李智德; 罗国涛
Original assignee: Shenzhen Yezhan Electronics Co ltd
Current assignee: Shenzhen Yezhan Electronics Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2023-03-14
Anticipated expiration: 2032-07-29

Abstract

The utility model is suitable for a sampling resistor technical field provides a high-power resistor, including hindering the body, hinder and be equipped with two electrodes on the body, hinder and be formed with a plurality of recesses that are used for adjusting and hinder the body resistance on the body, the recess is located and runs through and hinders the body around in the middle of two electrodes. The utility model discloses: the groove is arranged on the resistor body to reduce the sectional area of the resistor body, so that the resistance of the resistor body is increased, and the problem of improving the resistance of the resistor in a limited space is solved.

Description

High-power resistor

Technical Field

The utility model belongs to the sampling resistance field especially relates to a high-power resistor.

Background

In the field of the existing alloy sampling resistor, a resistor with small volume and small power is only suitable for an integrated circuit, a resistor product is required to have higher stability in a circuit with large current and large power and a high-precision circuit, and in the existing product series, because the structure of the product is limited and the requirement of the packaging size is met, the high-power resistor is required to be used in a limited space in the circuit with high-precision and large current and large power.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high-power resistor aims at solving the problem that needs improve the resistance value in finite space.

The utility model discloses a realize like this, a high-power resistor, including hindering the body, hinder and be equipped with two electrodes on the body, hinder and be formed with a plurality of recesses that are used for adjusting to hinder the body resistance on the body, this scheme is along hindering the massive structure of the body with the conventionality, the recess is located in the middle of two electrodes and extends and run through and hinder the body around, the direction of current between two electrodes of extending direction perpendicular to of recess is through set up the recess on hindering the body in order to reduce the sectional area that hinders the body, thereby makes hinder the resistance increase of body, solved the problem that improves the resistance in the finite space.

Furthermore, the resistor and the electrode of the block structure are usually attached by a metal foil, and when the structure is loaded with current for a long time, the resistance of the resistor is unstable, and meanwhile, the resistance that the structure of the metal foil can process is limited, and the scheme adopted by the structure with a large resistance is usually adopted, and when a product with a small resistance is manufactured, the metal foil has the following disadvantages: the requirement of small resistance cannot be met; the cost of processed samples is high; the pulse capability is poor. In order to solve the above problem, one possible solution is: the electrode is attached to the resistor through an electron beam welding process, and the electron beam welding has the advantages of no welding rod, difficulty in oxidation, good process repeatability and small thermal deformation. Because the electron beam welding directly melts the workpiece at the welding position to form a molten pool, the proposal of metal foil fitting is abandoned, the welding and fitting of the electrode and the resistance body are realized, the defects of the metal foil are overcome, and the resistance value is further adjusted by changing the front width and the rear width of the resistance body.

Furthermore, the present solution does not only limit the arrangement manner of the grooves, and one possible solution is: the resistor is a cuboid, the grooves are arranged alternately up and down, a smaller sectional area is formed between the bottom of each groove and the opposite surface of each groove, the grooves are equivalent to series resistors, a smaller sectional area is formed between every two adjacent grooves and is also equivalent to the series resistors, the resistance value is improved as much as possible in the limited resistor volume, and compared with the scheme that the grooves are arranged on the upper end face of the resistor or arranged on the lower end face of the resistor, the resistor has more equivalent resistors, so that the resistance value of the resistor is larger.

Furthermore, the present solution does not only limit the attaching position of the electrode, and the attaching position of the electrode is adjusted according to the use requirement of the resistor, wherein one possible solution is: the electrodes are respectively arranged on the left side end face and the right side end face of the resistor, the resistor is used in a high-precision circuit as a sampling resistor, the sampling value can be influenced by the small resistance value change of the resistor, and the electrodes are arranged on the left side and the right side of the resistor, so that the left side and the right side of the resistor are protected from being scratched, and the sampling value is more accurate.

Preferably, the electrodes are sheet-shaped, the front-back width of the resistor is smaller than that of the electrodes, the resistor is arranged in a space formed between the two sheet-shaped electrodes, the front end face and the back end face of the resistor are further protected from being scratched, and the accuracy of a sampling value is further improved.

Furthermore, in order to protect the upper end surface of the resistor from being scratched, one possible solution is: the electrode extends upwards to form a flange, and the upper end face of the resistor is lower than that of the flange, so that the upper end face of the resistor can be prevented from being scratched.

Preferably, the surface of the resistor is provided with a plastic package structure, and the end face of the outer side of the plastic package structure is flush with the upper end face of the flange and the front and rear end faces of the electrode respectively to form a cuboid structure, so that the inner resistor is further protected and the appearance is good.

Furthermore, according to the using environment of the resistor, the attaching position of the electrode is adjusted, and in other schemes: the electrodes are arranged on the lower end face of the resistor or respectively arranged on the upper end face and the lower end face of the resistor, and the resistance of the resistor can be influenced by the temperature of the resistor, so that the front, the rear, the left side and the right side of the resistor are exposed to obtain a larger heat dissipation area, and the accuracy of a sampling value is improved by heat dissipation of the resistor.

Further, in order to facilitate the installation of the resistor, one possible solution is: the outer side surfaces of the electrodes are flush with the end surfaces of the left side and the right side of the resistor body respectively, when the resistor is installed, the electrodes are clamped by using a flexible clamp to install the resistor body, and the outer side surfaces of the electrodes and the end surfaces of the left side and the right side of the resistor body form a larger plane, so that the clamping of the clamp is facilitated.

Furthermore, the present solution does not only limit the specific structure of the electrode, and the resistor is conveniently and quickly soldered on the circuit carrier, wherein one possible solution is: the electrode comprises a sheet-shaped main pin, the main pin comprises a main limiting end and a main conductive pin arranged on the main limiting end, the main conductive pin is inserted into a mounting hole of a circuit carrier after the resistor is clamped by a clamp, and meanwhile, the main limiting end is contacted and tightly abutted to the end face of the circuit carrier to reach a mounting position, so that the main conductive pin can be welded and fixed.

Furthermore, the electrode comprises a sheet-shaped auxiliary pin arranged on the inner side of the main pin, the auxiliary pin comprises an auxiliary limiting end and an auxiliary conductive pin arranged on the auxiliary limiting end, the lower end face of the auxiliary limiting end is flush with the lower end face of the main limiting end, the main pin is subjected to redundant configuration, and when the main pin fails, the main pin can still conduct electricity through the auxiliary pin.

Furthermore, in order to ensure the reliability of the resistor, the depth of the groove is less than two thirds of the height of the resistor, so that the resistor is prevented from cracking or even breaking at the bottom of the groove in the use process.

Furthermore, in order to further ensure the reliability of the resistor, the distance between two adjacent grooves is more than twice of the width of the groove, so that the resistor is prevented from cracking or even breaking between two adjacent grooves in the use process.

About implementing the utility model discloses a beneficial technological effect does: the groove is arranged on the resistor body to reduce the sectional area of the resistor body, so that the resistance of the resistor body is increased, and the problem of improving the resistance of the resistor in a limited space is solved.

Drawings

Fig. 1 is a front view of an embodiment of the present invention;

fig. 2 is a second front view of the embodiment of the present invention.

In the above drawings, the symbols have the meanings indicated:

1. a resistor; 2. an electrode; 101. a groove; 201. a flange; 202. a main pin; 202a, a main limit end; 202b, a main conductive needle; 203. a secondary pin; 203a and an auxiliary limiting end; 203b, secondary conductive pins.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

Referring to fig. 1, an embodiment of the invention is a high-power resistor, including a resistor 1, two electrodes 2 are arranged on the resistor 1, a plurality of grooves 101 for adjusting the resistance of the resistor 1 are formed on the resistor 1, the scheme uses a block structure of a conventional resistor, the grooves 101 are located between the two electrodes 2 and extend forward and backward and penetrate through the resistor 1, the extending direction of the grooves 101 is perpendicular to the current direction between the two electrodes 2, and the sectional area of the resistor 1 is reduced by arranging the grooves 101 on the resistor 1, so that the resistance of the resistor 1 is increased, and the problem of improving the resistance of the resistor in a limited space is solved.

Usually block structure's resistance 1 and electrode 2 adopt the mode of metal foil laminating to go on, and this structure is when long-time loading current, and the resistance of resistance is unstable, and the resistance that metal foil's structure can be processed is limited simultaneously, and the scheme that the structure of big resistance adopted usually, when the product of making little resistance, adopted metal foil to have following shortcoming: the requirement of small resistance cannot be met; the cost of processed samples is high; the pulse capability is poor. In order to solve the above problem, one possible solution is: the electrode 2 is attached to the resistor 1 through an electron beam welding process, and the electron beam welding has the advantages of no welding rod, difficulty in oxidation, good process repeatability and small thermal deformation. Because the electron beam welding directly melts the workpiece at the welding position to form a molten pool, the proposal of metal foil fitting is abandoned, the welding and fitting of the electrode 2 and the resistor 1 are realized, the defects of the metal foil are overcome, and the resistance value is further adjusted by changing the front width and the rear width of the resistor 1.

The present solution does not only limit the arrangement of the groove 101, and one possible solution is: the resistor 1 is a cuboid, the grooves 101 are alternately arranged up and down, a smaller sectional area is formed between the bottom of each groove 101 and the opposite surface of each groove 101, the equivalent resistance is a series resistor, a smaller sectional area is formed between every two adjacent grooves 101, the equivalent resistance is also a series resistor, the resistance value is improved as much as possible in the limited volume of the resistor 1, and compared with the scheme that the grooves 101 are arranged on the upper end face of the resistor 1 or arranged on the lower end face of the resistor 1, the resistor has more equivalent resistors, so that the resistance value of the resistor 1 is larger.

The application position of the electrode 2 is not limited uniquely by the scheme, and the application position of the electrode 2 is adjusted according to the use requirement of the resistor, wherein one feasible scheme is as follows: the electrodes 2 are respectively arranged on the end faces of the left side and the right side of the resistor 1, the resistor is used in a high-precision circuit as a sampling resistor, the sampling value can be influenced by the tiny resistance value change of the resistor 1, and the electrodes 2 are arranged on the left side and the right side of the resistor 1, so that the left side and the right side of the resistor 1 are protected from being scratched, and the sampling value is more accurate.

Preferably, the electrodes 2 are sheet-shaped, the front-back width of the resistor 1 is smaller than the front-back width of the electrodes 2, and the resistor 1 is arranged in a space formed between the two sheet-shaped electrodes 2, so that the front end face and the back end face of the resistor 1 are further protected from being scratched, and the accuracy of a sampling value is further improved.

In order to protect the upper end face of the resistor 1 from being scratched, one possible scheme is as follows: the electrode 2 extends upwards to form a flange 201, and the upper end face of the resistor 1 is lower than that of the flange, so that the upper end face of the resistor 1 can be prevented from being scratched.

Preferably, the surface of the resistor 1 is provided with a plastic package structure, and the end face of the outer side of the plastic package structure is flush with the upper end face of the flange 201 and the front and rear end faces of the electrode 2 respectively, so that a cuboid structure is formed, the inner resistor 1 is further protected, and the appearance is good.

The present solution does not only limit the specific structure of the electrode 2, and the resistor is conveniently and quickly soldered on the circuit carrier, wherein one feasible solution is: the electrode 2 includes a sheet-shaped main pin 202, the main pin 202 includes a main limit end 202a and a main conductive pin 202b disposed on the main limit end 202a, after the resistor is clamped by a fixture, the main conductive pin 202b is inserted into the mounting hole of the circuit carrier, and the main limit end 202a contacts and abuts against the end face of the circuit carrier to reach the mounting position, so that the main conductive pin 202b can be welded and fixed.

The electrode 2 comprises a sheet-shaped auxiliary pin 203 arranged at the inner side of the main pin 202, the auxiliary pin 203 comprises an auxiliary limiting end 203a and an auxiliary conductive pin 203b arranged on the auxiliary limiting end 203a, the lower end face of the auxiliary limiting end 203a is flush with the lower end face of the main limiting end 202a, redundant configuration is carried out on the main pin 202, and when the main pin 202 fails, the electric conduction can still be carried out through the auxiliary pin 203.

In order to ensure the reliability of the resistor 1, the depth of the groove 101 is less than two thirds of the height of the resistor 1, so that the bottom of the groove 101 is prevented from cracking or even breaking in the use process of the resistor 1.

In order to further ensure the reliability of the resistor 1, the distance between two adjacent grooves 101 is greater than twice the width of the groove 101, so that cracks and even disconnection between two adjacent grooves 101 of the resistor 1 in the use process are avoided.

Example two

Referring to fig. 2, according to the use environment of the resistor, the attachment position of the electrode 2 is adjusted to obtain an embodiment two, specifically, the electrode 2 is disposed on the lower end surface of the resistor 1 or disposed on the upper and lower end surfaces of the resistor 1 respectively, since the resistance of the resistor 1 is affected by the temperature of the resistor 1, the front, rear, left and right surfaces of the resistor 1 are exposed to obtain a larger heat dissipation area, and the heat dissipation of the resistor 1 is ensured to improve the accuracy of the sampling value.

In order to facilitate the installation of the resistor, one possible solution is: the outer side surfaces of the electrodes 2 are respectively flush with the left side end surface and the right side end surface of the resistor body 1, when the resistor is installed, the electrodes 2 are clamped by using a flexible clamp so as to install the resistor body, and the outer side surfaces of the electrodes 2 and the left side end surface and the right side end surface of the resistor body 1 form a larger plane, so that the clamping of the clamp is facilitated.

The working principle of the embodiment is as follows: because a smaller sectional area is formed between the bottom of the groove 101 and the opposite surface of the groove 101, the equivalent resistance is a series resistor, and a smaller sectional area is formed between two adjacent grooves 101, the equivalent resistance is a series resistor, and the resistance value is improved as much as possible in the limited volume of the resistor 1.

The beneficial technical effects related to the embodiment are as follows: the groove 101 is formed in the resistor 1 to reduce the sectional area of the resistor 1, so that the resistance of the resistor 1 is increased, and the problem of improving the resistance of the resistor in a limited space is solved.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A high power resistor characterized by: the resistor is characterized by comprising a resistor body (1), wherein two electrodes (2) are arranged on the resistor body (1), a plurality of grooves (101) used for adjusting the resistance of the resistor body (1) are formed in the resistor body (1), and the grooves (101) are located between the two electrodes (2) and penetrate through the resistor body (1) front and back.

2. The high power resistor according to claim 1, wherein: the resistor (1) is a cuboid and the grooves (101) are alternately arranged up and down.

3. The high power resistor according to claim 2, wherein: the electrodes (2) are respectively arranged on the left side end face and the right side end face of the resistor (1).

4. The high power resistor of claim 3, wherein: the electrode (2) extends upwards to form a flange (201).

5. The high power resistor according to claim 2, wherein: the electrodes (2) are arranged on the lower end face of the resistor (1) or respectively arranged on the upper end face and the lower end face of the resistor (1).

6. The high power resistor of claim 5, wherein: the outer side surfaces of the electrodes (2) are flush with the end surfaces of the left side and the right side of the resistor (1) respectively.

7. The high power resistor according to claim 4 or 6, wherein: the electrode (2) comprises a sheet-shaped main pin (202), and the main pin (202) comprises a main limiting end (202 a) and a main conductive pin (202 b) arranged on the main limiting end (202 a).

8. The high power resistor according to claim 7, wherein: the electrode (2) comprises a sheet-shaped auxiliary pin (203) arranged on the inner side of the main pin (202), the auxiliary pin (203) comprises an auxiliary limiting end (203 a) and an auxiliary conductive pin (203 b) arranged on the auxiliary limiting end (203 a), and the lower end face of the auxiliary limiting end (203 a) is flush with the lower end face of the main limiting end (202 a).

9. The high power resistor according to claim 1 or 2, wherein: the depth of the groove (101) is less than two thirds of the height of the resistor (1).

10. The high power resistor according to claim 1 or 2, wherein: the distance between two adjacent grooves (101) is more than twice of the width of the grooves (101).