A kind of surge protection circuit and surge protection method

一种浪涌保护、浪涌电压的技术，应用在电子领域，能够解决浪涌电压升高、滤波电路无法浪涌保护等问题

Inactive Publication Date: 2020-08-04
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This prior art generally takes measures when the surge is small, but in some environments, the surge voltage may increase, and a simple filter circuit cannot perform more effective surge protection

Method used

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  • A kind of surge protection circuit and surge protection method
  • A kind of surge protection circuit and surge protection method
  • A kind of surge protection circuit and surge protection method

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] An embodiment of the present invention provides a surge protection circuit, the surge protection circuit may include: a first series circuit and at least one second series circuit, wherein,

[0057] The first series circuit is composed of at least two TVS (Transient Voltage Suppressors) connected in series, one end of the first series circuit is connected to a positive terminal, and the other end is connected to a negative terminal;

[0058] The se...

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PUM

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Abstract

The present invention provides a surge protection circuit and a surge protection method. The surge protection circuit may include: a first series circuit composed of at least two TVS connected in series, one end of the first series line is connected to a positive terminal, and the other One end is connected to a negative polarity terminal; at least one second series circuit consisting of at least one TSS, one end of the second series circuit is connected between at least two TVSs in the first series circuit, and the other end is grounded; the first series circuit is connected to the device The protected circuit is connected in parallel; using the first series line, when the differential mode surge voltage appears at both ends of the first series line, the voltage of the back-end connection circuit is clamped to the first voltage value; using the first series line and the The second series circuit reduces the ground voltage of the positive terminal and the negative terminal to a second voltage value when a common-mode surge voltage occurs between the two ends of the first series circuit and the ground terminal respectively. According to the solution, more effective surge protection can be provided.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a surge protection circuit and a surge protection method. Background technique [0002] In some power or signal circuits, surges often occur. Surges are caused by switching and lightning transient overvoltages. Surges may cause abnormal operation or even damage to equipment in the circuit. [0003] For industrial measurement and control equipment under normal use conditions, such as field instruments, the surge voltage that may be caused by the environment is relatively low. For example, the surge voltage required for industrial measurement and control equipment specified in IEC61326 is 1kV. In order to achieve surge protection, a filter circuit can be used to protect the equipment. When a surge voltage occurs, the filter circuit will filter the surge voltage to avoid excessive voltage of the protected circuit at the back end, thereby realizing surge protection. [0004] Thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04H04M1/00H04M1/18
CPCH02H9/042H02H9/044
Inventor 埃里克·谢米斯凯胡飞凰闵令宝卓越
Owner SIEMENS AG
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