Unlock instant, AI-driven research and patent intelligence for your innovation.

Grounding design of main circuit board of smart meter

A technology for main circuit boards and smart meters, applied to printed circuit components, measuring electrical variables, measuring devices, etc., can solve problems affecting the normal operation of smart meters, meet the requirements of electromagnetic compatibility and immunity, speed up the progress of listing, Meet the effect of electromagnetic compatibility launch

Inactive Publication Date: 2012-07-04
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a ground loop in the circuit, external interference is likely to be received by this loop, thus affecting the normal operation of the smart meter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Grounding design of main circuit board of smart meter
  • Grounding design of main circuit board of smart meter
  • Grounding design of main circuit board of smart meter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Such as Figure 2 to Figure 5 As shown, the grounding design embodiment of the smart meter main circuit board of the present invention, the main circuit board is installed on the metal base plate, the main circuit board is provided with the smart meter main chip, the driver chip and the output terminal, the ground wire of the main circuit board to split, see figure 2 , at the boundary position between the main chip of the smart meter on the main circuit board and the ground GND1-1 of the drive circuit and the ground GND2-2 of the output terminal, use three magnetic beads 6 across the two ends, GND1 and GND2 is connected to the metal base plate separately, and the ground loop is cut off by this method, see image 3 and Figure 4 .

[0024] exist image 3 In , the black line box represents the main circuit board. This ground layout method separates GND1 and GND2. At the border of the two, use magnetic beads to straddle the two ends. The magnetic beads can be FB400...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a grounding design of a main circuit board of a smart meter, which can prevent a ground loop from becoming into an electromagnetic interference transmission path. The ground loop is very common in circuit of the smart meter, and can be either a transmitting antenna of electromagnetic radiation or a receiving antenna for receiving outside interference, and the problem of electromagnetic compatibility caused by the ground loop can be found everywhere. The grounding design method of the invention mainly comprises the earth wire layout of the main circuit board PCB (Printed Circuit Board), and the grounding strategy in a structure design; and a ferrite material is also used in the method. With the grounding design, the ground loop can be cut off, and the influence of the ground loop can be eliminated.

Description

technical field [0001] The invention relates to a grounding design of a main circuit board of an intelligent electric meter, in particular to a grounding design of a main circuit board of an intelligent electric meter which can prevent a ground loop from becoming an electromagnetic interference transmission path. Background technique [0002] In actual work, we often find that there is a "ground loop" in the smart meter. A typical ground loop diagram is shown in figure 1 As shown, GND1 in the figure represents the ground of the main chip of the smart meter and the driving circuit, and GND2 represents the ground of the output terminal. Due to the distributed capacitance between the ground plane of the main circuit board of the smart meter and the metal base plate, the figure 1 , we denote by C1 and C2. The dotted line in the figure above shows the ground loop. This ground loop can transmit the high-frequency interference generated by the smart meter itself, and can also ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H05K1/02G01R11/02
Inventor 党三磊肖勇郭远东
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID