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Wiring method of manganin shunt, PCB, circuit board and electric energy meter

A technology of manganin shunts and PCB boards, which is applied to the wiring method of manganin shunts, PCB boards, circuit boards and electric energy meters, and can solve the problems of inability to eliminate external power frequency magnetic field interference, poor product batch consistency, and increased Labor costs and other issues, to achieve the effect of reducing magnetic field interference, easy processing, and improving reliability

Pending Publication Date: 2021-01-22
SHENZHEN TECHRISE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the current sampling circuit, the connection between the manganese-copper shunt and the PCB board is mostly connected by twisted pair, which increases labor costs, and there is a risk of wire breakage at the soldering point; in addition, under the interference of the external power frequency magnetic field, The twisted pair connection method cannot eliminate external power frequency magnetic field interference, which affects the measurement accuracy and leads to poor product batch consistency

Method used

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  • Wiring method of manganin shunt, PCB, circuit board and electric energy meter
  • Wiring method of manganin shunt, PCB, circuit board and electric energy meter

Examples

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specific Embodiment 1

[0030] A kind of manganin shunt circuit board of the present application, such as figure 1 , 2 shown, where figure 1 It is a structural schematic diagram of the upper surface of the PCB from the first angle of the PCB board, figure 2 It is a schematic diagram of the structure from the second angle of the PCB, that is, the lower surface of the PCB.

[0031] It includes a manganin shunt 1 and a PCB board 2. The manganin shunt 1 is provided with two current sampling terminals 3 and 4, and the two current sampling terminals 3 and 4 are located on the same side edge of the manganin shunt for sampling current.

[0032] The two current sampling terminals 3 and 4 are used to fix the PCB board, and the two sampling terminals 3 and 4 of the manganese-copper shunt correspond to the two current sampling holes 13 and 14 through the PCB board, so that the manganese-copper shunt is vertically installed on the PCB board.

[0033] The two current sampling holes 13 and 14 that run through ...

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Abstract

The invention discloses a wiring method of a manganin shunt, a PCB, a circuit board and an electric energy meter. The PCB is included and is provided with two current sampling holes penetrating through the PCB and two current sampling ends used for mounting the manganin shunt, a straight line formed by the two current sampling holes is a sampling line, and on the PCB on one side of the sampling line, a continuous wire section connected with one current sampling hole is arranged; and the continuous wire section forms a coil winding and is used for generating an eddy current opposite to the magnetic field of the manganin shunt so as to counteract magnetic field interference. Sub-wire sections parallel to the manganin shunt are arranged on different layers of the PCB, all the sub-wire sections are connected together through the through holes to form the coil, the coil is connected with the manganin shunt in series, interference of an external magnetic field on the manganin shunt is eliminated, and sampling precision is improved.

Description

technical field [0001] The invention relates to the technical field of circuit boards, in particular to a wiring method for a manganin shunt, a PCB board, a circuit board and an electric energy meter. Background technique [0002] The manganin shunt is made of manganese copper precision resistance alloy material. It is a precision resistance element for making high-level metering voltage, current, bridge, potentiometer and other instruments. It is more suitable for making standard resistors for reference. . Energy meter manganin shunt (manganese copper sampling resistor), widely used in various digital energy meters as electricity metering components. [0003] At present, in the current sampling circuit, the connection between the manganese-copper shunt and the PCB board is mostly connected by twisted pair, which increases labor costs, and there is a risk of wire breakage at the soldering point; in addition, under the interference of the external power frequency magnetic fi...

Claims

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Application Information

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IPC IPC(8): G01R11/02G01R11/04
CPCG01R11/02G01R11/04
Inventor 肖杰谢庆广李刚强
Owner SHENZHEN TECHRISE ELECTRONICS
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