CN214898253U - Novel relay suitable for EMUs - Google Patents
Novel relay suitable for EMUs Download PDFInfo
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- CN214898253U CN214898253U CN202120866743.2U CN202120866743U CN214898253U CN 214898253 U CN214898253 U CN 214898253U CN 202120866743 U CN202120866743 U CN 202120866743U CN 214898253 U CN214898253 U CN 214898253U
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Abstract
The utility model discloses a novel relay suitable for EMUs, including relay contact point and relay coil, still include the diode, reverse buffer circuit and the load voltage limiting circuit that are connected in parallel with the relay coil, the relay coil circuit that the relay coil and diode formed links with the relay contact point; under the environment of cutting off non-resistive and mixed characteristic loads, burning loss of direct current impact current to a relay contact is avoided, the service life of the relay is prolonged, and the application range of the relay is widened.
Description
Technical Field
The utility model relates to a novel relay suitable for EMUs belongs to electrical design technical field.
Background
With the great investment of high-speed trains, the requirements on the reliability of the electrical performance of motor train units are higher and higher, and particularly, in a safety-related circuit, a switching device with an extremely low failure rate is required.
The diversification of non-resistive and mixed characteristic loads of an existing railway vehicle electrical system is continuously increased, the integration degree of remote control is higher originally, and a relay serves as a remote control device and plays a role in switching on and off the load. When a load needs to be cut off in a specific direct current circuit, the relay can bear short-time and large breaking current impact, a contact of the relay is easy to generate heat under the action of impact current, and then faults such as contact burning adhesion and the like are caused, so that the service life of the relay is shortened. The existing relay can not cope with the influence of large breaking direct current and can run along with the motor train unit for a long time, so that the contact burning probability of the relay is increased, and potential hazards are caused to the safe running of the motor train unit.
In view of this, the present patent application is specifically proposed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel relay suitable for EMUs to when realizing turning off non-hindering nature or mixed characteristic load, avoid the damage of direct current impulse current to the relay contact.
In order to achieve the above object, the utility model provides a following technical scheme: a novel relay suitable for a motor train unit comprises a relay contact and a relay coil, and further comprises a diode, a reverse buffer circuit and a load voltage limiting circuit which are connected with the relay coil in parallel, wherein a relay coil circuit formed by the relay coil and the diode is linked with the relay contact;
in the reverse buffer circuit, the cathode of the first voltage-stabilizing diode is respectively connected with the cathode of the second voltage-stabilizing diode, one end of the resistor and the output section of the relay contact, the anode of the first voltage-stabilizing diode is connected with the anode of the charging capacitor, the cathode of the charging capacitor is connected with the other end of the resistor and then grounded, and the anode of the second voltage-stabilizing diode is connected with the load;
and the negative electrode of the second voltage stabilizing diode of the load voltage limiting circuit is connected with the output end of the relay contact, the positive electrode of the second voltage stabilizing diode is connected with the output end of the load, and the output end of the load is respectively connected with the negative electrode of the capacitor, the other end of the resistor and the ground.
Preferably, the relay contact adopts the mode of connection of three groups of contacts in series, and the input of relay contact is connected to the power, and the inside three groups of contacts of relay contact are connected in series end to end in proper order, and the output connection load of relay contact.
Preferably, in the relay coil circuit, the positive input end of the relay coil is connected to the coil power supply and the positive electrode of the diode respectively, and the negative output end of the relay coil is connected to the negative electrode of the diode and the ground respectively.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses under excision non-resistance nature and mixed characteristic load environment, avoid direct current rush current to the scaling loss of relay contact, prolonged the life of relay, widened the application scope of relay.
(2) The utility model discloses can restrict relay contact and break back reverse voltage and to the impact of load, the system of using this novel relay possesses good operating characteristic, prevents big starting current to the impact damage of electric capacity simultaneously.
(3) The input voltage of the load can be limited, the damage to the load caused by overhigh voltage is prevented, and the load is protected to a certain extent.
(4) The electric energy in the relay coil can be released fast, the speed of the relay responding to the control signal is improved, and the external radiation of the electromagnetic signal in the relay coil is reduced.
Drawings
The present invention will now be further described with reference to the following drawings;
fig. 1 is a schematic circuit diagram of the novel relay of the present application;
in the above figures, the coil power source 1, the power source 2, the relay coil 3, the relay contact 4, the load 5, the diode D1, the first zener diode T1, the capacitor C1, and the second zener diode T2 are included.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the novel relay suitable for the motor train unit comprises a relay contact 4 and a relay coil 3, and further comprises a diode D1, a reverse buffer circuit and a load voltage limiting circuit which are connected with the relay coil 3 in parallel, wherein a relay coil circuit formed by the relay coil 3 and a diode D1 is linked with the relay contact 4;
in the reverse buffer circuit, the cathode of the first voltage-stabilizing diode T1 is respectively connected with the cathode of the second voltage-stabilizing diode T2, one end of the load 5 and the output section of the relay contact 4, the anode of the first voltage-stabilizing diode T1 is connected with the anode of the charging capacitor C1, the cathode of the charging capacitor C1 is connected with the load 5, the other end of the charging capacitor C1 is grounded, and the anode of the second voltage-stabilizing diode T2 is connected with the load 5;
in the load voltage limiting circuit, the cathode of the second voltage-stabilizing diode T2 is connected with the output end of the relay contact 4, the anode of the second voltage-stabilizing diode T2 is connected with the output end of the load 5, and the output end of the load 5 is respectively connected with the cathode of the capacitor C1, the other end of the resistor 5 and the ground.
In the relay coil circuit, the positive input end of the relay coil 3 is respectively connected with the coil power supply 1 and the positive electrode of the diode D1, and the negative output end of the relay coil 3 is respectively connected with the negative electrode of the diode D1 and the ground.
Based on the novel relay suitable for the EMUs, this application provides the following non-resistance nature or the process that mixed characteristic load shut off:
initially, the coil power supply 1 is effective, the power supply 2 is effective, the capacitor C1 is charged to an end, the voltage of the positive electrode is the voltage-stabilizing value of the first voltage-stabilizing diode T1, and the second voltage-stabilizing diode T2 is in a voltage-limiting state for the load 5;
when the relay is turned off, the coil power supply 1 is cut off, the relay coil 3 loses power, and the residual electric energy in the coil forms a follow current loop through the diode D1 to be quickly consumed; the relay coil 3 is electrified to link three groups of contacts in the relay contact 4 to be turned off simultaneously; at this time, the positive electrode of the capacitor C1 is still in a high voltage state, the voltage of the positive electrode of the capacitor C1 reaches one end of the load 5, the negative electrode of the zener diode T2 and the output end of the relay contact 4 through the zener diode T1, the regulated voltage value of the zener diode T2 is higher than that of the zener diode T1, and therefore the zener diode T2 is in a cut-off state; the voltage of the output end of the relay coil 4 is equal to the voltage of the negative electrode of the voltage stabilizing diode T1, so that the voltage difference between the movable contact and the fixed contact when the relay contact 4 is disconnected can be reduced; the power of the capacitor C1 is continuously consumed by the load 5 until it is finished.
The application proposes the following non-resistive or mixed characteristic load start-up procedure:
initially, power supply 2 is active;
the coil power supply 1 starts to supply power, the relay coil 3 is electrified to generate a magnetic field, the linkage relay contact 4 is closed, a voltage signal firstly reaches the cathode of the first voltage-stabilizing diode T1 and one end of the load 5, the anode of the first voltage-stabilizing diode T1 outputs a voltage signal to the anode of the capacitor C1, the voltage signal starts to be accumulated at the cathode of the second voltage-stabilizing diode T2 after the charging voltage of the capacitor C1 reaches the voltage-stabilizing value of the first voltage-stabilizing diode T1, the anode of the second voltage-stabilizing diode T2 outputs a voltage signal with the same voltage-stabilizing value as the voltage-stabilizing value to the load 5 after the voltage signal reaches the voltage-stabilizing value of the second voltage-stabilizing diode T2, and the load starts to work.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (3)
1. The novel relay suitable for the motor train unit comprises a relay contact (4) and a relay coil (3), and is characterized by further comprising a diode (D1) connected with the relay coil (3) in parallel, a reverse buffer circuit and a load voltage limiting circuit, wherein a relay coil circuit formed by the relay coil (3) and the diode (D1) is linked with the relay contact (4);
in the reverse buffer circuit, the cathode of a first voltage-stabilizing diode (T1) is respectively connected with the cathode of a second voltage-stabilizing diode (T2), one end of a load (5) and the output section of a relay contact (4), the anode of the first voltage-stabilizing diode (T1) is connected with the anode of a charging capacitor (C1), the cathode of the charging capacitor (C1) is connected with the load (5), the other end of the charging capacitor is grounded, and the anode of the second voltage-stabilizing diode (T2) is connected with the load (5);
in the load voltage limiting circuit, the cathode of the second voltage stabilizing diode (T2) is connected with the output end of the relay contact (4), the anode of the second voltage stabilizing diode is connected with the output end of the load (5), and the output end of the load (5) is respectively connected with the cathode of the capacitor (C1), the other end of the load (5) and the ground.
2. The novel relay according to claim 1, characterized in that the relay contact (4) adopts a connection mode of connecting three groups of contacts in series, the power supply (2) is connected with the input end of the relay contact (4), the three groups of contacts in the relay contact (4) are sequentially connected in series end to end, and the output end of the relay contact (4) is connected with the load (5).
3. The novel relay according to claim 1, characterized in that the relay coil circuit, the positive input terminal of the relay coil (3) is connected to the coil power supply (1) and the positive terminal of the diode (D1), respectively, and the negative output terminal of the relay coil (3) is connected to the negative terminal of the diode (D1) and ground, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120866743.2U CN214898253U (en) | 2021-04-26 | 2021-04-26 | Novel relay suitable for EMUs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120866743.2U CN214898253U (en) | 2021-04-26 | 2021-04-26 | Novel relay suitable for EMUs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214898253U true CN214898253U (en) | 2021-11-26 |
Family
ID=78888729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120866743.2U Active CN214898253U (en) | 2021-04-26 | 2021-04-26 | Novel relay suitable for EMUs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214898253U (en) |
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2021
- 2021-04-26 CN CN202120866743.2U patent/CN214898253U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.86, Jinhong East Road, Chengyang District, Qingdao City, Shandong Province Patentee after: Qingdao Sifang Alstom railway transportation equipment Co.,Ltd. Address before: No.86, Jinhong East Road, Chengyang District, Qingdao City, Shandong Province Patentee before: BOMBARDIER SIFANG (QINGDAO) TRANSPORTATION Ltd. |
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| CP01 | Change in the name or title of a patent holder |