The emc protection system of the main engine of the train automatic control system

Abstract

The invention provides an EMC protection system for an automatic train control system host. The EMC protection system carries out isolation processing on an encoding signal of the control host by a signal isolation module to ensure that external interference cannot directly influence an internal circuit of the control host. Then, anti-surge and peak current protection, decoupling and current limiting protection and surge power absorption are carried out by a high voltage discharge withstand voltage protection module, a voltage division current limiting module and a clamp common mode protection module in sequence, so as to realize three-level protection of EMC. Therefore, the EMC protection system for the automatic train control system host can simultaneously satisfy signal port isolation and signal port EMC protection.

Description

technical field [0001] The invention relates to an EMC protection technology for a host of an automatic train control system, in particular to an EMC protection system for a host of an automatic train control system with good pressure resistance and strong anti-interference. Background technique [0002] At present, in the train control room of the rail transit industry, the mainframe (controlling host) of the automatic train control system is all using foreign tablet computer products, such as PIXY, Siemens and other brands. There are incomplete considerations in the design of these products. Some products do not have a fully isolated design, and some product interfaces and some circuits do not have EMC (Electromagnetic Compatibility, electromagnetic compatibility) protection, so the EMC performance cannot meet the requirements, or after EMC protection, it cannot meet the requirements. As far as the performance of the insulation withstand voltage is concerned, the overall p...

AI Technical Summary

Problems solved by technology

There are incomplete considerations in the design of these products. Some products do not have a fully isolated design, and some product interfaces and some circuits do not have EMC (Electromagnetic Compatibility, electromagnetic compatibility) protection, so the EMC performance cannot meet the requirements, or after EMC protection, it cannot meet the requirements. Therefore, the overall performance of the product cannot meet the EMC requirements of the rail transit standard EN50121-3-2-2006 and the requirements of withstand voltage and insulation in EN50155-2007

The products in the rail transit industry must meet the requirements of industry standards at the same time, that is, meet the requirements of two aspects at the same time. First, the EMC test can pass level 3 or above. Second, it must meet the requirements of insulation resistance 100M ohms and insulation withstand voltage AC 500V; If the above standards cannot be met at the same time, there will be safety hazards in the actual use of the product. When the equipment is struck by lightning or has high-voltage interference, equipment damage may occur and cause traffic accidents.

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