Design method of intelligent power supply electronic converter of general-type railway signal lamp
A technology of railway signal lights and intelligent power supply, applied in the field of railway signal lights, can solve the problems of large influence of installation and connection distance, low conversion efficiency of power frequency transformers, and different connection methods, so as to achieve simple installation and connection and comprehensive functions. Effect
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[0026] Such as figure 1 As shown, the input terminal 2 and the output terminal 4 of the power electronic converter 1 are respectively connected in series between the current relay 8 and the railway signal lamp 7 in the central control room through the shielded twisted pair cable group 3 and the twisted pair cable 5, so that There is a good connection between the power electronic converter 1 casing shielding grounding wire 6, the casing and the shielding layer of the twisted pair cable. The power electronic converter 1 includes an electromagnetic compatibility (EMC / EMI) 9 , a main power circuit 10 , an auxiliary power source 11 and a signal processing circuit 12 . Among them, the EMC 9 has a three-stage series surge protector (SPD) connected to the grounding system, the input end of the EMC 9 is connected to the current relay 8 through the shielded twisted pair cable group 3, and the output end is connected to the main power circuit 10 and the auxiliary power supply circuit 10 ...
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