CN204030550U - The delay locked protective device of self-replaced type - Google Patents
The delay locked protective device of self-replaced type Download PDFInfo
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- CN204030550U CN204030550U CN201420501684.9U CN201420501684U CN204030550U CN 204030550 U CN204030550 U CN 204030550U CN 201420501684 U CN201420501684 U CN 201420501684U CN 204030550 U CN204030550 U CN 204030550U
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Abstract
The utility model discloses the delay locked protective device of a kind of self-replaced type, comprise protection circuits for triggering, delay circuit, monostable circuit, time-base circuit, reset circuit and protection switch metal-oxide-semiconductor, be mainly used in the occasion with high perturbation power supply.This utility model adopts delay circuit, and the generation of effectively inhibition system mistake protection, improves system works stability; Adopt monostable circuit to lock, can in the time there is corresponding fault, produce protection action accurately, and lock within a certain period of time this guard mode, effectively reduce failure rate and the damage of system; Adopt automatic non-fixed cycle batch (-type) reset circuit without human intervention, after fault is got rid of, can produce voluntarily homing action, automatically normal operation input.
Description
Technical field
The utility model relates to the delay locked protective device of a kind of self-replaced type, specifically, relates to the delay locked protective device of a kind of self-replaced type for power supply output loop.
Background technology
At present; for DC power supply; often because load damage or wiring faults cause overcurrent or the short circuit of power supply output; but traditional overcurrent or short-circuit protection are mostly current-limiting type overcurrent protection; in order to prevent the misoperation of overcurrent protection; over-current protection point is often much larger than its rated current; like this in the time there is overcurrent or short trouble; pass through output loop with regard to having larger electric current; the corresponding device of output loop also can bear larger current stress, and this stress if fault do not get rid of and will exist.Will cause like this early failure of some components and parts, thereby power supply is broken down.If overcurrent protection is designed to lock shutoff formula; just can not there is above problem; but due to the complexity of power source loads; such as having inductive load, capacitive load etc.; in the time of start, there is the problem of impulse current in these load meetings; therefore the utility model has increased again the function of time delay trigger protection when protected mode is designed to lock shutoff formula, will avoid like this occurring mistake protection, thereby has improved the stability of system.When having solved above problem, also have a problem to need to solve, that locks exactly to close and has no progeny, and after fault is got rid of, how to carry out the reset of lock-out state.Can manual reset, but some unattended occasion, this condition of not having.This just need to automatically reset, so the utility model has designed again automatic non-fixed cycle batch (-type) reset circuit, therefore the maximum feature of this circuit is before getting rid of, first carry out several short-period reset detection, when finding that fault still exists, the reset cycle will be lengthened, and want after several long period reset detection, can carry out again several short-period reset detection, so go round and begin again.The impact producing when thereby reduction that can be maximum resets, improves the protection to system.
Utility model content
The delay locked protective device of a kind of self-replaced type that the utility model designs in order to solve the problems of the technologies described above just.
The utility model solves the technical scheme that its technical problem adopts:
The delay locked protective device of a kind of self-replaced type, comprises protection circuits for triggering, delay circuit, monostable circuit, time-base circuit, reset circuit and protection switch metal-oxide-semiconductor; It is characterized in that: protection circuits for triggering input is connected with protection sampled signal output, detect in real time guard signal and whether reach the threshold voltage of circuits for triggering; Protection circuits for triggering output is connected with delay circuit control end, when delay circuit receives effective triggering signal, sends the monostable circuit being attached thereto after internal delay time to, monostable circuit is triggered, and lock guard mode; Delay circuit also receives the signal of the reset circuit being attached thereto simultaneously; Monostable circuit output is connected with the grid of protection switch pipe MOSFET; Monostable circuit reset terminal is connected with reset circuit, receives reset signal; After monostable circuit is triggered, self enters lock-out state, sends the grid of cut-off signals to protection switch pipe MOSFET simultaneously, makes its shutoff; Reset circuit one end is connected with delay circuit, and one end is connected with monostable circuit in addition, and for these two parts provide reset signal, reset circuit input control end is connected with time-base circuit, by its active homing time of time-base circuit control; The source electrode of protection switch pipe MOSFET is connected with major loop anode, and the drain electrode of protection switch pipe MOSFET is connected with major loop negative terminal, by the switching signal of monostable circuit, controls the break-make of major loop, realizes the object of protection.
The delay locked protective device of described self-replaced type; it adopts by the automatic non-fixed cycle batch (-type) of combination reset mode generation of time-base circuit control reset circuit and resets; after ensureing that power supply wants fault to get rid of; within a short period of time, system was normally worked again; simultaneously again before fault is not got rid of, few homing action that carries out of trying one's best.
1, operation principle
Protection circuits for triggering receive outside sampled signal in real time, when this signal is after internal damping amplifies, give inner comparison circuit, when this value is during higher than the threshold voltage of comparison circuit, and protection circuits for triggering output level upset output triggering signal.Triggering signal is given delay circuit and is carried out delay process, if while not arriving the end of time delay, it is invalid that triggering signal just becomes, and delay circuit meeting self-resetting is waited for the next effectively arrival of triggering level.As the retention time of triggering signal has reached or has exceeded time delay end time of delay circuit; produce effective delay triggering signal and give monostable circuit, make monostable circuit enter monostability, produce locking cut-off signals to protection electronic switch; turn-offed, cut off corresponding power loop.Protection is closed the reset circuit of having no progeny and will be opened.Approximately turn-off after 5 seconds, producing an effective width is 1 second reset signal, and delay circuit and monostable circuit are resetted, and produces the breakdown action of once protecting loop.If fault is got rid of, export the state that unlocks.If fault is not got rid of, also can in succession produce 2 intervals width of 5 seconds is 1 second reset signal.If now fault is not also got rid of, can interval within 10 seconds, produce an effective width and be the reset signal of 1 second.Produce after 5 such reset signals, can then produce again 3 effective widths that are spaced apart 5 seconds is the reset signal of 1 second, until after fault eliminating, install and reset.The effect of time-base circuit is the interval time of controlling the generation reset signal of reset circuit.
2, the feature of device
1. function admirable, effectively reduces the impact in loop.
The utility model, for traditional current foldback circuit, has carried out brand-new design and perfect, thereby effectively reduces the impact of large electric current to corresponding circuit, has improved the reliability of corresponding system.
2. simple circuit, working stability.
The utility model adopts delay circuit, to avoid the misoperation of protective circuit; Adopt monostable circuit to lock, effectively reduced the impact to system under malfunction, system is started to protection more fully.
3. apply wide model
The utility model is not only applied to the output loop of power supply, also can be applied independently in the corresponding current supply circuit of wanting of having of other, as the charge circuit of battery discharge loop, battery.Output loop of generator etc.
The beneficial effects of the utility model are generations of effectively inhibition system mistake protection, improve system works stability; Can in the time there is corresponding fault, produce protection action accurately, and lock within a certain period of time this guard mode, effectively reduce failure rate and the damage of system; Without human intervention, after getting rid of, fault can produce voluntarily homing action, automatically normal operation input.
Brief description of the drawings
Fig. 1 is the delay locked protective device theory diagram of the utility model self-replaced type.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1, the delay locked protective device of a kind of self-replaced type of the utility model, comprises protection circuits for triggering, delay circuit, monostable circuit, time-base circuit, reset circuit and protection switch metal-oxide-semiconductor; It is characterized in that: protection circuits for triggering input is connected with protection sampled signal output, detect in real time guard signal and whether reach the threshold voltage of circuits for triggering; Protection circuits for triggering output is connected with delay circuit control end, when delay circuit receives effective triggering signal, sends the monostable circuit being attached thereto after internal delay time to, monostable circuit is triggered, and lock guard mode; Delay circuit also receives the signal of the reset circuit being attached thereto simultaneously; Monostable circuit output is connected with the grid of protection switch pipe MOSFET; Monostable circuit reset terminal is connected with reset circuit, receives reset signal; After monostable circuit is triggered, self enters lock-out state, sends the grid of cut-off signals to protection switch pipe MOSFET simultaneously, makes its shutoff; Reset circuit one end is connected with delay circuit, and one end is connected with monostable circuit in addition, and for these two parts provide reset signal, reset circuit input control end is connected with time-base circuit, by its active homing time of time-base circuit control; The source electrode of protection switch pipe MOSFET is connected with major loop anode, and the drain electrode of protection switch pipe MOSFET is connected with major loop negative terminal, by the switching signal of monostable circuit, controls the break-make of major loop, realizes the object of protection.
The delay locked protective device of described a kind of self-replaced type; it adopts by the automatic non-fixed cycle batch (-type) of combination reset mode generation of time-base circuit control reset circuit and resets; after ensureing that power supply wants fault to get rid of; within a short period of time, system was normally worked again; simultaneously again before fault is not got rid of, few homing action that carries out of trying one's best.
The utility model is not limited to above-mentioned preferred forms, and other any or akin products identical with the utility model that anyone draws under enlightenment of the present utility model, within all dropping on protection range of the present utility model.
Claims (2)
1. the delay locked protective device of self-replaced type, is characterized in that: comprise protection circuits for triggering, delay circuit, monostable circuit, time-base circuit, reset circuit and protection switch metal-oxide-semiconductor; It is characterized in that: protection circuits for triggering input is connected with protection sampled signal output, detect in real time guard signal and whether reach the threshold voltage of circuits for triggering; Protection circuits for triggering output is connected with delay circuit control end, when delay circuit receives effective triggering signal, sends the monostable circuit being attached thereto after internal delay time to, monostable circuit is triggered, and lock guard mode; Delay circuit also receives the signal of the reset circuit being attached thereto simultaneously; Monostable circuit output is connected with the grid of protection switch pipe MOSFET; Monostable circuit reset terminal is connected with reset circuit, receives reset signal; After monostable circuit is triggered, self enters lock-out state, sends the grid of cut-off signals to protection switch pipe MOSFET simultaneously, makes its shutoff; Reset circuit one end is connected with delay circuit, and one end is connected with monostable circuit in addition, and for these two parts provide reset signal, reset circuit input control end is connected with time-base circuit, by its active homing time of time-base circuit control; The source electrode of protection switch pipe MOSFET is connected with major loop anode, and the drain electrode of protection switch pipe MOSFET is connected with major loop negative terminal, by the switching signal of monostable circuit, controls the break-make of major loop.
2. the delay locked protective device of self-replaced type according to claim 1, is characterized in that: adopt by the automatic non-fixed cycle batch (-type) of combination reset mode generation of time-base circuit control reset circuit and reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420501684.9U CN204030550U (en) | 2014-09-02 | 2014-09-02 | The delay locked protective device of self-replaced type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420501684.9U CN204030550U (en) | 2014-09-02 | 2014-09-02 | The delay locked protective device of self-replaced type |
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| Publication Number | Publication Date |
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| CN204030550U true CN204030550U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420501684.9U Active CN204030550U (en) | 2014-09-02 | 2014-09-02 | The delay locked protective device of self-replaced type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167711B (en) * | 2014-09-02 | 2018-02-02 | 航天长峰朝阳电源有限公司 | The delay locked protection device of self-replaced type |
-
2014
- 2014-09-02 CN CN201420501684.9U patent/CN204030550U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167711B (en) * | 2014-09-02 | 2018-02-02 | 航天长峰朝阳电源有限公司 | The delay locked protection device of self-replaced type |
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| C14 | Grant of patent or utility model | ||
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