Title:
PROTECTION CIRCUIT BASED ON CHOKE TRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2018/120628
Kind Code:
A1
Abstract:
A protection circuit based on a choke transformer, comprising: a choke transformer (CT), an adapter (400), and a switch module (100). The switch module (100) comprises a first switch (S1) and a second switch (S2). When the second switch (S2) is turned off, the first switch (S1) is turned off simultaneously. A first end and a second end of a primary coil (PC) of the choke transformer are connected to two parallel steel rails (200), respectively. A first end of a first secondary coil (SC1) of the choke transformer is connected to a first end of a signal module (300), and a second end of the first secondary coil (SC1) is connected to a second end of the signal module (300) by means of the first switch (S1). A first end of a second secondary coil (SC2) of the choke transformer is connected to a first end of the adapter (400) by means of the second switch (S2), and a second end of the second secondary coil (SC2) is connected to a second end of the adapter (400). When a circuit where the second secondary coil (SC2) is located is disconnected, the circuit where the first secondary coil (SC1) is located is disconnected simultaneously, so that a traction current is prevented from invading a signal channel to cause a device to be burned, and the problem of risks to the traveling safety due to shunt detection result errors caused by rising of the voltage of the circuit where the first secondary coil (SC1) is located is avoided.
Inventors:
QIAO ZHICHAO (CN)
WANG ZHIXIN (CN)
XU ZONGQI (CN)
WANG ZHIXIN (CN)
XU ZONGQI (CN)
Application Number:
PCT/CN2017/086244
Publication Date:
July 05, 2018
Filing Date:
May 27, 2017
Export Citation:
Assignee:
BEIJING NATIONAL RAILWAY RES & DESIGN INSTITUTE OF SIGNAL & COMMUNICATION GROUP CO LTD (CN)
International Classes:
B61L1/02; H02H7/04
Foreign References:
| CN2360914Y | 2000-01-26 | |||
| CN102684153A | 2012-09-19 | |||
| CN2313777Y | 1999-04-14 | |||
| CN203306042U | 2013-11-27 | |||
| CN201026890Y | 2008-02-27 | |||
| CN201038724Y | 2008-03-19 | |||
| CN105470958A | 2016-04-06 | |||
| US5094413A | 1992-03-10 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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