CN211348394U - Temperature tracking compensation shunt - Google Patents
Temperature tracking compensation shunt Download PDFInfo
- Publication number
- CN211348394U CN211348394U CN201921881652.5U CN201921881652U CN211348394U CN 211348394 U CN211348394 U CN 211348394U CN 201921881652 U CN201921881652 U CN 201921881652U CN 211348394 U CN211348394 U CN 211348394U
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- thermistor
- sampling resistor
- printed circuit
- circuit board
- heat
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Abstract
A temperature tracking compensation shunt comprises a printed circuit board, a sampling resistor, a thermistor and a pin connector, the printed circuit board is provided with screw holes, the contact pin connector, the sampling resistor and the thermistor are welded on the printed circuit board, the pin joint comprises four pins which are arranged side by side, the thermistor is connected in series on a circuit between two pins of the pin joint, the sampling resistor is connected in series with a circuit between the other two pins of the contact pin connector, the upper surfaces of the sampling resistor and the thermistor are provided with heat conducting fins, the conducting strip pass through the screw hole of screw mounting on printed circuit board in, the utility model overcomes prior art's is not enough, the conducting strip makes the heat transfer effect reinforcing between sampling resistor and the thermistor, makes the temperature on the sampling resistor can in time be for the thermistor through the conducting strip conduction.
Description
Technical Field
The utility model relates to a shunt technical field specifically belongs to a temperature tracking compensation shunt.
Background
A shunt is an instrument for measuring direct current and is made according to the principle that when direct current passes through a resistor, voltage is generated across the resistor. The shunt generally uses a sampling resistor, and when the sampling resistor is actually used, the temperature is increased due to the change of the ambient temperature and the self temperature, such as the increase of the power consumption of the sampling resistor when the current exceeds the design specification. The temperature and the shunt have a fixed temperature characteristic curve, the temperature is caused to drift due to the influence of the temperature coefficient of the shunt, the precision is reduced, precision correction is carried out by monitoring the temperature of the shunt, the real-time tracking curve can basically eliminate the precision influence caused by the temperature, the detection precision can be improved, the current method for monitoring the temperature of the shunt is that a thermistor is welded on a circuit board near the shunt, the temperature of the shunt is conducted to the thermistor through air, the heat conduction is slow, and the thermistor cannot timely sense the temperature change of the shunt.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a temperature tracking compensation shunt, thermistor can carry out the perception to the real-time operating temperature of shunt, has overcome the not enough of prior art.
In order to solve the above problems, the utility model adopts the following technical proposal:
the utility model provides a temperature tracking compensation shunt, includes that printed circuit board, sampling resistor, thermistor and contact pin connect, printed circuit board on be equipped with the screw hole, contact pin joint, sampling resistor and thermistor welding on printed circuit board, the contact pin connect including four pins side by side, thermistor establish ties on the circuit between wherein two pins that the contact pin connects, sampling resistor establish ties on the circuit between two other pins that the contact pin connects, sampling resistor and thermistor's upper surface on be equipped with the conducting strip, the conducting strip pass through in the screw hole of screw installation on printed circuit board.
Furthermore, the heat conducting strip is a rectangular copper sheet.
Furthermore, the sampling resistor adopts an alloy current sampling resistor.
Furthermore, the thermistor adopts a surface mounted PTC thermistor.
Furthermore, insulating heat-conducting silicone grease is filled between the heat-conducting fin and the upper surfaces of the sampling resistor and the thermistor which are welded on the printed circuit board.
Furthermore, support bars are also adhered on the printed circuit boards on the left side of the thermistor and the two sides of the sampling resistor.
Furthermore, the support bar be insulating plastic, the left support bar of thermistor highly equal to the height of thermistor on the printed circuit board, the support bar of sampling resistance both sides highly equal to the height of sampling resistance on the printed circuit board.
Compared with the prior art, the utility model discloses an implement the effect as follows: the heat conducting sheet enhances the heat transfer effect between the sampling resistor and the thermistor, so that the temperature on the sampling resistor can be transferred to the thermistor through the heat conducting sheet in time, and the thermistor can sense the temperature change of the sampling resistor in time when the shunt is used; insulating heat-conducting silicone grease is coated between the heat-conducting fin and the sampling resistor and between the heat-conducting fin and the thermistor, so that the contact surface between the heat-conducting fin and the sampling resistor and between the heat-conducting fin and the thermistor is increased, and the heat transfer efficiency is improved; and the support bars pasted on the printed circuit board can prevent the sampling resistor and the thermistor from being damaged when the heat conducting fins are installed.
Drawings
Fig. 1 is a top view of the present invention.
Fig. 2 is a plan view of the present invention when the heat conductive sheet is not mounted.
Fig. 3 is a top view of the printed circuit board after the support bars are adhered thereon.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation to be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1-2, the temperature tracking compensation shunt of the present invention comprises a printed circuit board 1, a sampling resistor 3, a thermistor 2 and a pin connector 5, wherein the printed circuit board 1 is provided with a screw hole 4, the pin connector 5, the sampling resistor 3 and the thermistor 2 are welded on the printed circuit board 1, the pin connector 5 comprises four pins 51 side by side, the thermistor 2 is connected in series on a circuit between two of the pins 51 of the pin connector 5, the sampling resistor 3 is connected in series on a circuit between the other two pins 51 of the pin connector 5, a heat conducting strip 6 is provided on the upper surfaces of the sampling resistor 3 and the thermistor 2, the heat conducting strip 6 is a rectangular copper strip, the size of the copper strip is selected according to the size and distance between the thermistor 2 and the sampling resistor 3, the length of the general copper strip is 10mm, the width is 5-7mm, in order to enhance the heat transfer efficiency between the heat conducting strip 6 and the thermistor 2 and the sampling resistor, still pack between the upper surface of welded sampling resistor 3 and thermistor 2 on conducting strip 6 and printed circuit board 1 and have insulating heat conduction silicone grease, insulating heat conduction silicone grease is the ordinary insulating heat conduction silicone grease of market, and conducting strip 6 passes through screw 7 to be installed in screw hole 4 on printed circuit board 1, the utility model discloses well sampling resistor 3 is alloy current sampling resistor 3, and the model is LRP alloy current sampling resistor, and thermistor 2 adopts paster PTC thermistor, and the model is CMZL 0805-101.
Example 2
As shown in fig. 3, the utility model provides a temperature tracking compensation shunt, including printed circuit board 1, sampling resistor 3, thermistor 2 and contact pin joint 5, printed circuit board 1 is equipped with screw hole 4, contact pin joint 5, sampling resistor 3 and thermistor 2 weld on printed circuit board 1, contact pin joint 5 includes four pin 51 side by side, thermistor 2 establishes ties on the circuit between two of them pin 51 of contact pin joint 5, sampling resistor 3 establishes ties on the circuit between two other pin 51 of contact pin joint 5, support bar 8 has still been pasted on the printed circuit board 1 on the left side of thermistor 2 and the both sides of sampling resistor 3, support bar 8 is insulating plastic, the height of the support bar 8 on the left side of thermistor 2 equals the height of thermistor 2 on printed circuit board 1, the height of the support bar 8 on the both sides of sampling resistor 3 equals the height of sampling resistor 3 on printed circuit board 1, be equipped with conducting strip 6 on the upper surface of sampling resistor 3 and thermistor 2, conducting strip 6 is located support bar 8, it has insulating heat conduction silicone grease to fill between conducting strip 6 and sampling resistor 3 and the thermistor 2, insulating heat conduction silicone grease is the ordinary insulating heat conduction silicone grease of market, conducting strip 6 is the rectangle copper sheet, the size of copper sheet is selected according to thermistor 2 and sampling resistor 3's size and distance, the length of general copper sheet is 10mm, the width is 5-7mm, conducting strip 6 passes through screw 7 and installs in screw hole 4 on printed circuit board 1, the utility model discloses well sampling resistor 3 is alloy current sampling resistor 3, and the model is LRP alloy current sampling resistor, and thermistor 2 adopts paster PTC thermistor, and the model is CMZL 0805-101.
The utility model discloses install copper conducting strip 6 additional on thermistor 2 and sampling resistor 3's surface, conducting strip 6 makes the heat transfer effect between sampling resistor 3 and thermistor 2 strengthen, make the temperature on the sampling resistor 3 in time conduct to thermistor 2 through conducting strip 6, make this shunt when using, thermistor 2 can in time perception sampling resistor 3's temperature variation, and it coats insulating heat conduction silicone grease to coat between conducting strip 6 and sampling resistor 3 and thermistor 2, avoided conducting strip 6 and sampling resistor 3 and thermistor 2 upper surface insufficient contact's problem, increased the contact surface between conducting strip 6 and sampling resistor 3 and thermistor 2 and connect, improved heat transfer efficiency; the support bars 8 are adhered to the printed circuit board 1 on the left side of the thermistor 2 and on the two sides of the sampling resistor 3, so that the sampling resistor 3 and the thermistor 2 can be prevented from being damaged when the heat-conducting fin 6 is installed; certainly, the heat conducting sheet 6 can not only timely conduct the temperature of the sampling resistor 3 to the thermistor 2, but also conduct the ambient temperature to the thermistor 2 when the ambient temperature rises, so that the current sampling resistor 3 is ensured to be within a safe derating range.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a temperature tracking compensation shunt, includes that printed circuit board, sampling resistor, thermistor and contact pin connect, printed circuit board on be equipped with screw hole, its characterized in that: the contact pin connector, the sampling resistor and the thermistor are welded on the printed circuit board, the contact pin connector comprises four parallel pins, the thermistor is connected in series on a circuit between two pins of the contact pin connector, the sampling resistor is connected in series on a circuit between the other two pins of the contact pin connector, heat-conducting fins are arranged on the upper surfaces of the sampling resistor and the thermistor, and the heat-conducting fins are installed in screw holes in the printed circuit board through screws.
2. The temperature tracking compensated shunt of claim 1, wherein: the heat conducting strip is a rectangular copper sheet.
3. The temperature tracking compensated shunt of claim 1, wherein: and insulating heat-conducting silicone grease is filled between the heat-conducting fin and the upper surfaces of the sampling resistor and the thermistor welded on the printed circuit board.
4. A temperature tracking compensated shunt according to claim 1 or 3, wherein: and support bars are also adhered to the printed circuit boards on the left side of the thermistor and the two sides of the sampling resistor.
5. The temperature tracking compensated shunt of claim 4, wherein: the support bar be insulating plastic, the left support bar of thermistor highly equal printed circuit board on thermistor's height, the support bar of sampling resistor both sides highly equal printed circuit board on sampling resistor's height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921881652.5U CN211348394U (en) | 2019-11-04 | 2019-11-04 | Temperature tracking compensation shunt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921881652.5U CN211348394U (en) | 2019-11-04 | 2019-11-04 | Temperature tracking compensation shunt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211348394U true CN211348394U (en) | 2020-08-25 |
Family
ID=72092890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921881652.5U Active CN211348394U (en) | 2019-11-04 | 2019-11-04 | Temperature tracking compensation shunt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211348394U (en) |
-
2019
- 2019-11-04 CN CN201921881652.5U patent/CN211348394U/en active Active
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