CN205429688U - Track traffic safety door electromagnetic lock short -circuit protection circuit and system - Google Patents
Track traffic safety door electromagnetic lock short -circuit protection circuit and system Download PDFInfo
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- CN205429688U CN205429688U CN201521019204.6U CN201521019204U CN205429688U CN 205429688 U CN205429688 U CN 205429688U CN 201521019204 U CN201521019204 U CN 201521019204U CN 205429688 U CN205429688 U CN 205429688U
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- electromagnetic lock
- safety door
- resistance
- protection circuit
- circuit
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Abstract
The utility model discloses a track traffic safety door electromagnetic lock short -circuit protection circuit and system, the protection circuit includes: be connected with the singlechip to the optical coupler that ends switches on when the high level signal of singlechip output when the low level signal of singlechip output, the first resistance of being connected with optical coupler, second resistance with first ohmic connection, with first resistance and second ohmic connection to when optical coupler switches on, optical coupler by the time N -MOS pipe that ends, diode and self -resuming fuse with the N -MOS union coupling. Because add the self -resuming fuse in the power supply loop that the electromagnetic lock belonged to with safe door controller, when the short circuit phenomenon appearing, the self -resuming fuse will break off, then safe door controller will break off with the supply circuit of electromagnetic lock, and consequently, safe door controller can not burnt because the electromagnetic lock short circuit phenomenon appears. Track traffic safety door electromagnetic lock short -circuit protection system includes foretell protection circuit.
Description
Technical field
This utility model relates to electronic technology field, particularly relates to a kind of rail transit safety door electromagnetic lock short-circuit protection circuit and system.
Background technology
In track traffic, station platform safety door electromagnetic lock is mounted in outside safety door controller, and two parts are installed from production and debugged is all complete independently.During metro operation, safety door controller directly provides electric energy for electromagnetic lock, and electromagnetic lock is controlled accordingly, therefore when external electromagnetic lock out existing short circuit, directly by the circuit direct short-circuit of the supply electromagnetic lock within safety door controller, thus burning of safety door controller internal components can be caused.
As can be seen here, when electromagnetic lock is short-circuited phenomenon, how preventing safety door controller from burning is those skilled in the art's problem demanding prompt solutions.
Utility model content
The purpose of this utility model is to provide a kind of rail transit safety door electromagnetic lock short-circuit protection circuit, for when electromagnetic lock is short-circuited phenomenon, how to prevent safety door controller from burning.Additionally, this utility model also provides for a kind of rail transit safety door electromagnetic lock short circuit protection system.
For solving above-mentioned technical problem, this utility model provides a kind of rail transit safety door electromagnetic lock short-circuit protection circuit, including:
It is connected with single-chip microcomputer, and turns on when described single-chip microcomputer output low level signal, the photo-coupler of cut-off when described single-chip microcomputer output high level signal；
The first resistance being connected with described photo-coupler；
The second resistance being connected with described first resistance；
It is connected with described first resistance and described second resistance, and turns on when described photo-coupler turns on, the N-MOS pipe of the cut-off when described photo-coupler ends；
The diode being connected with described N-MOS pipe and resettable fuse；
Wherein, the source electrode of described N-MOS pipe and the second end ground connection of described second resistance, the grid of described N-MOS pipe is connected with the first end of the second end of described first resistance and described second resistance, the drain electrode of described N-MOS pipe is connected with the anode of described diode and the electronic lock negative power end of safety door controller, the negative electrode of described diode is connected with the electronic lock positive power source terminal of the first end of described resettable fuse and described safety door controller, and the second end of described resettable fuse is connected with the power end of described safety door controller.
Preferably, also include:
Zener diode with described second resistor coupled in parallel.
Preferably, the voltage of described resettable fuse is 220V；Holding electric current is 0.33A；Interrupting electric current is 0.74A；It is 20A that maximum interrupts electric current.
Preferably, the model of described resettable fuse is LVR033S.
Preferably, the voltage of the power end of described safety door controller is 110V.
A kind of rail transit safety door electromagnetic lock short circuit protection system, including described protection circuit, the single-chip microcomputer being connected with described protection circuit and electromagnetic lock and the safety door controller being connected with described electromagnetic lock.
Rail transit safety door electromagnetic lock short-circuit protection circuit provided by the utility model; resettable fuse is added in the electromagnetic lock current supply circuit with safety door controller place; when short circuit phenomenon occurs; resettable fuse will disconnect; then safety door controller will disconnect with the power supply circuits of electromagnetic lock; therefore, because of electromagnetic lock, safety door controller will not occur that short circuit phenomenon is burned out.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment, the accompanying drawing used required in embodiment will be done simple introduction below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The circuit diagram of a kind of rail transit safety door electromagnetic lock short-circuit protection circuit that Fig. 1 provides for this utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art under not making creative work premise, the every other embodiment obtained, broadly fall into this utility model protection domain.
Core of the present utility model is to provide a kind of rail transit safety door electromagnetic lock short-circuit protection circuit and system.
In order to make those skilled in the art be more fully understood that this utility model scheme, the utility model is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings.
Embodiment one
The circuit diagram of a kind of rail transit safety door electromagnetic lock short-circuit protection circuit that Fig. 1 provides for this utility model.As it is shown in figure 1, rail transit safety door electromagnetic lock short-circuit protection circuit, including:
It is connected with single-chip microcomputer 10, and turns on when single-chip microcomputer 10 output low level signal, the photo-coupler 11 of cut-off when single-chip microcomputer 10 exports high level signal；
The the first resistance R1 being connected with photo-coupler 11；
The the second resistance R2 being connected with the first resistance R1；
It is connected with the first resistance R1 and the second resistance R2, and turns on when photo-coupler 11 turns on, the N-MOS pipe 12 of cut-off when photo-coupler 11 ends；
The diode 13 being connected with N-MOS pipe 12 and resettable fuse 14；
Wherein, the source electrode of N-MOS pipe 12 and the second end ground connection of the second resistance R2, first end of the grid of N-MOS pipe 12 and second end of the first resistance R1 and the second resistance R2 connects, the drain electrode of N-MOS pipe 12 is connected with the anode of diode 13 and the electronic lock negative power end of safety door controller 15, the negative electrode of diode 13 is connected with the first end of resettable fuse 14 and the electronic lock positive power source terminal of safety door controller 15, and the second end of resettable fuse 14 is connected with the power end of safety door controller 15.
It is coil component that electromagnetic lock 16 comprises two parts part, and another part is Sensor section, and coiler part function is when safety door controller controls to provide kinetic energy, and coil passes through magnetic induction effect, picked up by electromagnetic lock lock, when kinetic energy disappears, puts down lock.Sensor is the duty of faradism magnetic padlock lock, is in locking state and is in released state.
Under normal circumstances, if single-chip microcomputer 10 input low level signal, then photo-coupler 11 turns on, N-MOS pipe 12 also can turn on accordingly simultaneously, so loop at electromagnetic lock 16 just energy place turns on, and electromagnetic lock lock is picked up by the coil of electromagnetic lock by magnetic induction effect, is in locking state.If short circuit phenomenon occurs in electromagnetic lock, then resettable fuse 14 will disconnect, then the loop of the power supply connecting electromagnetic lock 16 and safety door controller 15 will be disconnected, and therefore, safety door controller 15 would not occur burning phenomenon.Owing to resettable fuse 14 has self-recovering function, therefore, when short trouble eliminates, then resettable fuse 14 continues to keep work.
The rail transit safety door electromagnetic lock short-circuit protection circuit that the present embodiment provides; resettable fuse is added in the electromagnetic lock current supply circuit with safety door controller place; when short circuit phenomenon occurs; resettable fuse will disconnect; then safety door controller will disconnect with the power supply circuits of electromagnetic lock; therefore, because of electromagnetic lock, safety door controller will not occur that short circuit phenomenon is burned out.
Wherein, protection circuit, also include:
The Zener diode in parallel for resistance R2 with second.
Wherein, the voltage of resettable fuse is 220V；Holding electric current is 0.33A；Interrupting electric current is 0.74A；It is 20A that maximum interrupts electric current.
In being embodied as, can select the parameter of resettable fuse, for example, it is possible to the voltage selecting resettable fuse is 220V, holding electric current is 0.33A, and interrupting electric current is 0.74A, and it is 20A that maximum interrupts electric current.It should be noted that above-mentioned parameter is only a kind of concrete application scenarios, not representing can only be this kind of embodiment.
Wherein, the model of resettable fuse is LVR033S.
Wherein, the voltage of the power end of described safety door controller is 110V.
In order to allow those skilled in the art more understand, the scheme that this utility model provides, application process given below include:
Short circuit phenomenon occur in electromagnetic lock from locking state become released state time, therefore, when electromagnetic lock be in locking state and single-chip microcomputer send high level signal time, safety door controller obtains the state of electromagnetic lock to realize detecting by the sensor in electromagnetic lock.Under normal circumstances, if single-chip microcomputer sends high level signal, then photo-coupler is in cut-off state, and N-MOS pipe is also at cut-off state, and electromagnetic lock will be become released state from locking state.If there is short circuit phenomenon, then electromagnetic lock just cannot be become released state from locking state.
If testing result shows that electromagnetic lock remains as locking state, explanation is broken down, then stop providing electric energy to electromagnetism.
Owing to, during detection, it is possible that the situation of erroneous judgement, in order to avoid this situation, continuous detecting twice in the present embodiment, the time interval of detection is 2s.If twice testing result is locking state, then explanation testing result is correct, then stop providing electric energy to electromagnetic lock.Owing to the lock of electromagnetic lock needs the regular hour by picking up to put down, therefore need to wait regular hour, i.e. Preset Time after single-chip microcomputer have sent high level signal, then detect.In the present embodiment, Preset Time is 200ms.
Wherein, also include after electromagnetic lock provides electric energy in stopping: safety door controller sends alarm signal.
Embodiment two
Rail transit safety door electromagnetic lock short circuit protection system, including the protection circuit described in embodiment one, the single-chip microcomputer being connected with protection circuit and electromagnetic lock and the safety door controller being connected with electromagnetic lock.
Due to the operation principle of protection circuit being described in detail in embodiment one, therefore, the description of the present embodiment refers to the explanation of embodiment one, wouldn't repeat here.
Above rail transit safety door electromagnetic lock short-circuit protection circuit provided by the utility model and system are described in detail.In description, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and between each embodiment, identical similar portion sees mutually.Should be understood that; for those skilled in the art; on the premise of without departing from this utility model principle, it is also possible to this utility model is carried out some improvement and modification, these improve and modification also falls in this utility model scope of the claims.
Professional further appreciates that, the unit of each example described in conjunction with the embodiments described herein and algorithm steps, can be with electronic hardware, computer software or the two be implemented in combination in, in order to clearly demonstrate the interchangeability of hardware and software, the most generally describe composition and the step of each example according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel specifically should can be used for using different methods to realize described function to each, but this realization is it is not considered that exceed scope of the present utility model.
Claims (6)
1. a rail transit safety door electromagnetic lock short-circuit protection circuit, it is characterised in that including:
It is connected with single-chip microcomputer, and turns on when described single-chip microcomputer output low level signal, the photo-coupler of cut-off when described single-chip microcomputer output high level signal；
The first resistance being connected with described photo-coupler；
The second resistance being connected with described first resistance；
It is connected with described first resistance and described second resistance, and turns on when described photo-coupler turns on, the N-MOS pipe of the cut-off when described photo-coupler ends；
The diode being connected with described N-MOS pipe and resettable fuse；
Wherein, the source electrode of described N-MOS pipe and the second end ground connection of described second resistance, the grid of described N-MOS pipe is connected with the first end of the second end of described first resistance and described second resistance, the drain electrode of described N-MOS pipe is connected with the anode of described diode and the electronic lock negative power end of safety door controller, the negative electrode of described diode is connected with the electronic lock positive power source terminal of the first end of described resettable fuse and described safety door controller, and the second end of described resettable fuse is connected with the power end of described safety door controller.
Protection circuit the most according to claim 1, it is characterised in that also include:
Zener diode with described second resistor coupled in parallel.
Protection circuit the most according to claim 1, it is characterised in that the voltage of described resettable fuse is 220V；Holding electric current is 0.33A；Interrupting electric current is 0.74A；It is 20A that maximum interrupts electric current.
4. according to the protection circuit described in claims 1 to 3 any one, it is characterised in that the model of described resettable fuse is LVR033S.
Protection circuit the most according to claim 1, it is characterised in that the voltage of the power end of described safety door controller is 110V.
6. a rail transit safety door electromagnetic lock short circuit protection system, it is characterised in that include the protection circuit described in claim 1 to 5 any one, the single-chip microcomputer being connected with described protection circuit and electromagnetic lock and the safety door controller being connected with described electromagnetic lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521019204.6U CN205429688U (en) | 2015-12-08 | 2015-12-08 | Track traffic safety door electromagnetic lock short -circuit protection circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521019204.6U CN205429688U (en) | 2015-12-08 | 2015-12-08 | Track traffic safety door electromagnetic lock short -circuit protection circuit and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205429688U true CN205429688U (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521019204.6U Withdrawn - After Issue CN205429688U (en) | 2015-12-08 | 2015-12-08 | Track traffic safety door electromagnetic lock short -circuit protection circuit and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205429688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680410A (en) * | 2015-12-08 | 2016-06-15 | 重庆川仪自动化股份有限公司 | Short-circuit protection circuit, method and system for electromagnetic lock of rail transit safety door |
| CN113030673A (en) * | 2021-02-24 | 2021-06-25 | 中科新松有限公司 | Electromagnet control circuit and detection method thereof |
-
2015
- 2015-12-08 CN CN201521019204.6U patent/CN205429688U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680410A (en) * | 2015-12-08 | 2016-06-15 | 重庆川仪自动化股份有限公司 | Short-circuit protection circuit, method and system for electromagnetic lock of rail transit safety door |
| CN105680410B (en) * | 2015-12-08 | 2018-03-20 | 重庆川仪自动化股份有限公司 | A kind of rail transit safety door electromagnetic lock short-circuit protection circuit, method and system |
| CN113030673A (en) * | 2021-02-24 | 2021-06-25 | 中科新松有限公司 | Electromagnet control circuit and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20180320 |
|
| AV01 | Patent right actively abandoned |