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Device and method for emc protection and filtering of high-voltage power supply

A technology of high-voltage power supply and filter device, applied in the direction of output power conversion device, electrical components, etc., can solve the problem of data packet loss in sending and receiving data of industrial Ethernet switches, reduce high-frequency noise and peak interference, improve damping factor, The effect of improving reliability

Active Publication Date: 2017-12-19
东土科技(宜昌)有限公司
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Problems solved by technology

[0006] The embodiment of the present invention provides an EMC protection and filtering device and method for a high-voltage power supply, which is used to solve the problem of data packet loss caused by the industrial Ethernet switch when the existing equipment is disturbed by EMC

Method used

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  • Device and method for emc protection and filtering of high-voltage power supply

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Embodiment Construction

[0035] The present invention provides an EMC protection and filtering device and method for a high-voltage power supply in order to ensure zero packet loss in sending and receiving data when high-level interference is applied to an industrial Ethernet switch.

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] figure 1 It is a structural schematic diagram of the EMC protection and filtering device for the high-voltage power supply provided by the embodiment of the present invention. see figure 1 , the device includes a first protection module 11 , a common mode filter module 12 , a second protection module 13 , a power conversion module 14 and an interference noise filter module 15 . in,

[0038] The first protection module 11 is used to damp and filter the interference in the input circuit and then output it; the first protection module 11 is connected to the common-mode filter module 12, and the common-m...

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Abstract

The invention discloses an EMC protection and filtering device and method for a high-voltage power supply, which solves the problem of data packet loss in sending and receiving of industrial Ethernet switches when existing equipment is disturbed by EMC. The device includes: a first protection module, a common-mode filter module, a second protection module, a power conversion module, and an interference noise filter module; Module and interference noise filter module; wherein, the components in the first protection module and the second protection module are equivalent to form a double T-shaped filter before and after the common mode filter module, improve the input damping of the common mode filter module, and the interference noise filter module The components in it form a T-type filter and a π-type filter to reduce the high-frequency noise and spike interference of the DC output, so that when the AC power supply inlet of the industrial Ethernet switch has a high level of EMC interference, the equipment sends and receives data with zero packet loss , effectively improving the reliability of the equipment.

Description

technical field [0001] The invention relates to the technical field of internal power supply protection in industrial control equipment, in particular to an EMC protection and filtering device and method for a high-voltage power supply. Background technique [0002] EMC (Electro Magnetic Compatibility, Electromagnetic Compatibility) refers to the ability of a device or system to operate in compliance with the requirements in its electromagnetic environment without causing unbearable electromagnetic interference to any equipment in its environment. In the actual industrial field application of industrial Ethernet switches, when the power AC power supply system has switching action process, relay contact jumps or switches inductive loads, the probability of interference such as power surge, pulse group and indirect induction lightning is very high. Therefore, industrial Ethernet switches have strict requirements on the EMC environment. [0003] In the prior art, when the EMC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/44H02M1/12H02M1/14
Inventor 孙学民
Owner 东土科技(宜昌)有限公司
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