EMC protection and filtering device and method of high voltage power supply

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

Active Publication Date: 2015-11-25
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, wh

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  • EMC protection and filtering device and method of high voltage power supply
  • EMC protection and filtering device and method of high voltage power supply
  • EMC protection and filtering device and method 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 of a high voltage power supply, and solves the problem that Data packet loss of an industrial Ethernet switch is caused when existing equipment is subjected to EMC interference. The device includes a first protection module, a common-mode filter module, a second protection module, a power supply conversion module and an interference noise filter module; and a power input end is connected with the first protection module, the common-mode filter module, the second protection module, the power supply conversion module and the interference noise filter module in sequence. Elements in the first protection module and the second protection module equivalently form a double-T-shaped filter before and behind the common-mode filter module, thereby improving input damping of the common-mode filter module, elements in the interference noise filter module form a T-shaped filter and a pi-shaped filter, thereby reducing high frequency noise and peak interference of direct current output, realizing zero packet loss in data receiving and transmitting of equipment when high-level EMC interference exists in an alternating current power supply inlet of an industrial Ethernet switch, and effectively improving 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 (ElectroMagnetic Compatibility, Electromagnetic Compatibility) refers to the ability of a device or system to operate in compliance with the requirements in its electromagnetic environment and not cause 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 env...

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Application Information

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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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