A control circuit board electromagnetic shielding sealing device

A technology for controlling circuit boards and sealing devices, applied in the fields of magnetic field/electric field shielding, electrical components, etc., can solve the problems of increased cost and assembly process, inability to achieve shielding sealing, reduced reliability, etc., to improve the shielding grounding effect, shielding and sealing The effect of good effect and improved reliability

Inactive Publication Date: 2018-05-01
CHINA NORTH VEHICLE RES INST
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Method 1, there will be a gap between the cable and the side wall opening of the metal casing, and a complete shielding seal cannot be achieved
[0008] Method 2, the cable is connected through the electrical connector at the opening on the side wall of the metal shell. An electrical connector that can be screwed to the metal shell must be used, and the electrical connector shell must be well grounded; not only increases the cost And the assembly process, and the cable is transferred through the electrical connector, the reliability is reduced; if the ground shielding is not handled well at the transfer point, it will have negative effects and be more susceptible to interference

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
  • A control circuit board electromagnetic shielding sealing device
  • A control circuit board electromagnetic shielding sealing device
  • A control circuit board electromagnetic shielding sealing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The side wall of the cuboid casing 1 welded by aluminum plate has a rectangular through hole 41 with a height of H and a length of L, and the surface of the casing 1 is treated with conductive oxidation Ct.Ocd, such as Figure 4 to Figure 5 As shown, the rectangular sealing gasket 411 corresponding to the rectangular through hole 41 with a height of h and a length of l, l=L-1.5±0.2mm, h=H-1.5±0.2mm, the thickness a of the rectangular sealing gasket 411 and the shell 1 The thickness of the side walls is equal.

[0044] The height of the extension of the rectangular gasket 411 is h'=h+10mm, the length l'=1+10mm, and the thickness b of the extension is 2mm.

[0045] Rectangular gasket 411 is made of conductive rubber by pressing film. The conductive rubber is silver-plated aluminum conductive rubber with a tensile strength of 2MPa, a breaking elongation of 100%, a hardness of 75 Shore, and a volume resistivity of 0.01ohm- cm.

[0046] In the contact surface between the r...

Embodiment 2

[0048] The side wall of the cuboid shell 1 made of aluminum alloy by casting has a circular through hole 42 with a diameter of D, and conducts conductive oxidation Ct.Ocd treatment on the surface of the shell 1, such as Figure 6 to Figure 7 As shown, the circular gasket 422 with a diameter d corresponding to the circular through hole 42 is d=D-1.5±0.2mm, and the thickness a of the circular gasket 422 is equal to the thickness of the side wall of the housing 1 .

[0049] The diameter d' of the extension of the circular sealing gasket 422 is d'=d+10mm, and the thickness b of the extension is 2mm.

[0050] The circular gasket 422 is made of conductive rubber through lamination. The conductive rubber is silver-plated aluminum conductive rubber with a tensile strength of 2.5 MPa, a breaking elongation of more than 100%, a hardness of 85 Shore, and a volume resistivity of less than 0.01. ohm-cm.

[0051] The metal wire shielding net 10 is embedded in the contact surface between th...

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 provides an electromagnetic shielding and sealing device for a control circuit board. The device includes a casing and a through hole arranged on the side wall of the casing. The casing made of metal is rectangular, and the through hole interfaces with the control circuit board arranged in the casing one by one. Correspondingly, the cable passes through the through hole and is connected to the interface of the control circuit board. The improvement is that a sealing cover and a sealing rubber pad are provided between the circular or rectangular through hole and the cable. A groove is arranged in the center along the direction in which the cable runs. Compared with the prior art, the electromagnetic shielding and sealing device for the control circuit board provided by the present invention can realize the non-disconnected shielding and sealing of the cable passing through the cabin and through the wall, avoiding the process of using an electrical connector to switch through the cabin by disconnecting the cable Complexity, improve the reliability of the penetration cable, and reduce product cost.

Description

technical field [0001] The invention relates to an electromagnetic shielding and sealing device, in particular to an electromagnetic shielding and sealing device for a control circuit board. Background technique [0002] The permanent magnet motor controller (hereinafter referred to as the controller) is mainly composed of the DSP main control circuit and the main power circuit. It sends control signals to the IGBT and other power switching elements of the main power circuit through the DSP main control circuit board to realize the control of the permanent magnet motor. digital control. The main power circuit is the executive circuit of the controller, and the core of the controller is the DSP main control circuit board. The main control circuit board calculates and processes signals such as voltage and current through software, and outputs control signals. The voltage, current and other input signals of the main control circuit board and the control output signal are weak...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
Inventor 邢彦斌姜茹田德文高香香刘华源高鹏飞韩志平张健马亚青孙文欣张学铭
Owner CHINA NORTH VEHICLE RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap