CN203445063U - Circuit for preventing relay adhesion - Google Patents
Circuit for preventing relay adhesion Download PDFInfo
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- CN203445063U CN203445063U CN201320511879.7U CN201320511879U CN203445063U CN 203445063 U CN203445063 U CN 203445063U CN 201320511879 U CN201320511879 U CN 201320511879U CN 203445063 U CN203445063 U CN 203445063U
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- output relay
- relay
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Abstract
The utility model provides a circuit for preventing relay adhesion, relating to the technical field of relays. The circuit comprises an output relay J1. According to the utility model, an auxiliary bypass which can be controlled to be conducted instantly is connected with the output relay J1 of an uninterrupted power source in parallel. When the output relay J1 is closed, the auxiliary bypass is controlled to be conducted before the conduction of the output relay J1, and disconnected after the output relay J1 is completely closed. When the output relay is opened, the auxiliary bypass is conducted simultaneously, and disconnected after the output relay J1 is completely opened. In this way, the adhesion generated at the moment of the open and close of the output relay J1 of the uninterrupted power source can be completely eliminated. Besides, when the uninterrupted power source works in an ECO mode, in the case of bypass exception, the auxiliary bypass can be controlled to be conducted quickly, so that the power interruption time of the load is ensured to meet the requirements of the normal use of the uninterrupted power source.
Description
Technical field
The utility model relates to relay technical field, particularly relates to a kind of circuit that prevents relay adhesion.
Background technology
Relay is a kind of electric control device, is conventionally applied in the control circuit of automation, and it is actually a kind of " automatic switch " that goes to control large electric current running with little electric current, plays the effects such as automatic adjusting, safeguard protection, change-over circuit in circuit.
Conventionally, uninterrupted power supply all can carry out the break-make between control inverter and bypass and load with output relay J1.Uninterrupted power supply is a kind of batteries to store energy device that contains, the power protective equipment that the inverter of take is formant.When civil power, input when normal, uninterrupted power supply is just transformed to stable alternating voltage for load by civil power by rectification unit, inversion unit, completes the charging to storage battery simultaneously; When civil power is undesired, uninterrupted power supply is just converted to the energy storing in storage battery the alternating current powering load of constant voltage, constant frequency by DC boosting, inversion unit.And when the anomalies such as uninterrupted power supply appearance overload, excess temperature, uninterrupted power supply will be powered load from inversion end power switching to bypass end, guarantee not power down of load end.
In uninterrupted power supply, when output relay J1 is used as on-off switch, due to load shock electric current, relay contact is aging and the reason such as relay shell fragment mechanical shaking, may occur the situation of output relay J1 adhesion.
Fig. 1 is the circuit topology framework of conventional a kind of uninterrupted power supply of prior art, and this circuit is the interlock circuit framework of uninterrupted power supply while working in bypass mode and utility mode, and remainder circuit, due to irrelevant with the utility model, does not provide at this.In Fig. 1, mainly comprise that control unit, rectification unit, inversion unit, output relay J1 and bypass STS form, wherein bypass STS is that bidirectional thyristor SCR2 is also the thyristor of two reverse parallel connections, BYPSTS is the control signal of bypass STS, and INVRLY is the control signal of output relay J1.
When uninterrupted power supply is operated in bypass mode, rectification unit and inversion unit are not all worked, and output relay J1 is also in off-state, and civil power is directly given output load supplying through bypass STS; And when uninterrupted power supply is operated in utility mode, bypass STS is in cut-off state, civil power is converted to stable alternating current to output load supplying after rectification unit, inversion unit and output relay J1.
When uninterrupted power supply is switched to utility mode from bypass mode, if inversion is phase-locked completes in judgement, will first adhesive output relay J1, then postpone T1(and be generally a civil power cycle, if mains frequency is 50HZ, T1 is 20ms) the rear bypass STS that disconnects, during due to adhesive output relay J1, be the equal of that inverter voltage and bypass voltage instantaneous are in parallel, if two-way alternating current there are differences in this instantaneous phase and amplitude, just unavoidably can cause the instantaneous large-current output relay J1 that flows through, just likely can cause the phenomenon of output relay J1 adhesion to occur.
And when uninterrupted power supply is switched to bypass mode from utility mode, will first close rectifier and inverter, and then disconnect output relay J1 conducting bypass STS.In disconnecting the process of output relay J1, if output relay J1 occur shell fragment after flicking because mechanical shaking causes output relay J1 again during conducting, so again during conducting because the residual voltage on bypass voltage and the inner output filter capacitor of inversion unit exists certain pressure reduction, will cause the instantaneous large-current output relay J1 that flows through, the same phenomenon of output relay J1 adhesion that just likely causes occurs.
For uninterrupted power supply, if the situation of adhesion appears in output relay J1, just have the risk of bypass voltage and inverter voltage moment output in parallel, this may damage uninterrupted power supply, causes load to work.
Summary of the invention
The purpose of this utility model is to avoid weak point of the prior art and a kind of circuit that prevents relay adhesion is provided, this can prevent that moment that the circuit of relay adhesion can effectively avoid output relay J1 adhesive or disconnection from occurring because two ends pressure reduction causes the phenomenon that impulse current flows through output relay J1, thereby can thoroughly eliminate the risk of the output relay J1 adhesion of uninterrupted power supply.
The purpose of this utility model is achieved through the following technical solutions:
A kind of circuit that prevents relay adhesion is provided, comprises output relay J1, it is characterized in that: the two ends of output relay J1 are parallel with the auxiliary bypass that can control instant conducting.
Wherein, the described auxiliary bypass of controlling instant conducting when output relay J1 adhesive prior to output relay J1 conducting.
Concrete, the described auxiliary bypass of controlling instant conducting disconnects prior to output relay J1 conducting and after output relay J1 completes adhesive when output relay J1 adhesive.
Wherein, described auxiliary bypass conducting the disconnection after output relay J1 disconnects completely when output relay J1 disconnects of controlling instant conducting.
Wherein, the described auxiliary bypass of controlling instant conducting comprises bidirectional thyristor SCR2.
Wherein, the described auxiliary bypass of controlling instant conducting utilizes outside control signal to control its conducting or disconnection.
The beneficial effects of the utility model: 1, just the two ends by the output relay J1 at uninterrupted power supply are parallel with the auxiliary bypass that can control instant conducting, disconnect prior to output relay J1 conducting and after output relay J1 completes adhesive when the output relay J1 adhesive by controlling the auxiliary bypass that can control instant conducting; The conducting disconnecting after output relay J1 disconnects completely when output relay J1 disconnects of the auxiliary bypass that can control instant conducting, in adhesive and disconnection moment, there is the phenomenon of adhesion in the output relay J1 that just can thoroughly eliminate uninterrupted power supply; 2, because the extra auxiliary bypass adding just bears transient energy, steady state load energy is all to be born by output relay J1, therefore, by the specification of choose reasonable bidirectional thyristor SCR2, can do radiating treatment to this bidirectional thyristor SCR2; 3, the extra auxiliary bypass adding also can be used as other purposes, for example uninterrupted power supply works in ECO pattern (ECO pattern is that load is directly by bypass power supply, but rectification unit and the inversion unit of uninterrupted power supply are in running order) time, if bypass occurs abnormal, can be by controlling its fast conducting, to guarantee that the power down time of load meets the normal instructions for use of uninterrupted power supply.
Accompanying drawing explanation
Utilize accompanying drawing to be described further utility model, but the embodiment in accompanying drawing does not form any restriction of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to the following drawings other accompanying drawing.
Fig. 1 is the circuit topology framework of the conventional a kind of uninterrupted power supply of prior art.
Fig. 2 is the circuit diagram that the utility model is applied to uninterrupted power supply.
Embodiment
With the following Examples the utility model is further described.
A kind of circuit that prevents relay adhesion of the present embodiment, as shown in Figure 2, Fig. 2 is on the basis of the circuit topology framework of the uninterrupted power supply of Fig. 1, is parallel with the auxiliary bypass A that can control instant conducting at the two ends of output relay J1.The auxiliary bypass A that can control instant conducting disconnects prior to output relay J1 conducting and after output relay J1 completes adhesive when output relay J1 adhesive.Can control auxiliary bypass A conducting disconnection after output relay J1 disconnects completely when output relay J1 disconnects of instant conducting.
The auxiliary bypass A that can control instant conducting comprises bidirectional thyristor SCR2 particularly.The auxiliary bypass A that certainly, can control instant conducting also can be set to the switch that other can control instant conducting.
Particularly, by the control signal INVSTS from control unit, control conducting and the disconnection of bidirectional thyristor SCR2.
When uninterrupted power supply is switched to utility mode from bypass mode, output relay J1 need switch to adhesive from disconnecting, when judgement, inversion is phase-locked while completing, first adhesive output relay J1 conducting bidirectional thyristor SCR2, disconnect bypass STS simultaneously, then postpone T2(and be generally a civil power cycle, if mains frequency is 50HZ, T2 is 20ms) the rear bidirectional thyristor SCR2 that disconnects.Because existing pickup time, output relay J1 postpones, bidirectional thyristor SCR2 will be prior to output relay J1 conducting like this, thereby when output relay J1 adhesive, also with regard to not causing instantaneous large-current to flow through output relay J1, cause the phenomenon of output relay J1 adhesion to occur.
And when uninterrupted power supply is switched to bypass mode from utility mode, will first close rectifier and inverter, and then disconnection output relay J1 conducting bidirectional thyristor SCR2 and bypass STS, then postpone to disconnect bidirectional thyristor SCR2 after T3 (mechanical shaking Time dependent when this time need flick according to the shell fragment of output relay J1, is generally tens ms).In disconnecting the process of output relay J1, because bidirectional thyristor SCR2 is all the time in conducting state, even the shell fragment that occurs so output relay J1 after flicking because mechanical shaking causes output relay J1 again during conducting, can there is not pressure reduction in the residual voltage on the inner output filter capacitor of bypass voltage and inversion unit, equally with regard to not causing instantaneous large-current to flow through output relay J1, cause the phenomenon of output relay J1 adhesion to occur yet yet.
From foregoing description, can find out, the present embodiment can thoroughly be eliminated uninterrupted power supply output relay J1 in adhesive and disconnect the risk that moment exists adhesion.Bidirectional thyristor SCR2 bears load current moment, when therefore reality is used, as long as the specification of choose reasonable bidirectional thyristor SCR2 just can be done radiating treatment to it.In addition, what need further supplementary notes is, if (ECO pattern is that load is directly by bypass power supply to comprise ECO pattern in uninterrupted power supply mode of operation, but rectification unit and the inversion unit of uninterrupted power supply are in running order), so under ECO pattern when bypass voltage occurs when abnormal, if just realize the switching of ECO pattern and utility mode by adhesive output relay J1, will be because output relay J1 exists pickup time, cause occurring the longer power down time (being generally tens ms), this may cause user load power down.If but included in circuit as the bidirectional thyristor SCR2 in Fig. 2, need only so conducting bidirectional thyristor SCR2 in adhesive output relay J1, because bidirectional thyristor SCR2 exists pickup time unlike inversion relay, therefore just can guarantee that uninterrupted power supply is when being switched to utility mode from ECO pattern, the output power down time can meet the normal operation requirement of uninterrupted power supply.
It should be noted that: the present embodiment just proposes a kind of application of the present utility model, and the utility model is not limited to the circuit that is applied in the present embodiment.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection range; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (6)
1. can prevent a circuit for relay adhesion, comprise output relay J1, it is characterized in that: the two ends of output relay J1 are parallel with the auxiliary bypass that can control instant conducting.
2. a kind of circuit that prevents relay adhesion according to claim 1, is characterized in that: the described auxiliary bypass of controlling instant conducting when output relay J1 adhesive prior to output relay J1 conducting.
3. a kind of circuit that prevents relay adhesion according to claim 2, is characterized in that: the described auxiliary bypass of controlling instant conducting disconnects prior to output relay J1 conducting and after output relay J1 completes adhesive when output relay J1 adhesive.
4. a kind of circuit that prevents relay adhesion according to claim 1, is characterized in that: described auxiliary bypass conducting the disconnection after output relay J1 disconnects completely when output relay J1 disconnects of controlling instant conducting.
5. a kind of circuit that prevents relay adhesion according to claim 1, is characterized in that: the described auxiliary bypass of controlling instant conducting comprises bidirectional thyristor SCR2.
6. a kind of circuit that prevents relay adhesion according to claim 1, is characterized in that: the described auxiliary bypass of controlling instant conducting utilizes outside control signal to control its conducting or disconnection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320511879.7U CN203445063U (en) | 2013-08-21 | 2013-08-21 | Circuit for preventing relay adhesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320511879.7U CN203445063U (en) | 2013-08-21 | 2013-08-21 | Circuit for preventing relay adhesion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203445063U true CN203445063U (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320511879.7U Expired - Lifetime CN203445063U (en) | 2013-08-21 | 2013-08-21 | Circuit for preventing relay adhesion |
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| CN (1) | CN203445063U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413729A (en) * | 2013-08-21 | 2013-11-27 | 广东易事特电源股份有限公司 | Circuit preventing relay from adhering |
| CN104576206A (en) * | 2015-01-19 | 2015-04-29 | 国家电网公司 | Spark control device of alternating current contactor |
| CN104616926A (en) * | 2015-02-06 | 2015-05-13 | 孙毅彪 | Non-arc, series and intelligent bridge type high-voltage circuit breaker |
| CN104820183A (en) * | 2015-05-15 | 2015-08-05 | 阳光电源股份有限公司 | Method and device for detecting on/off of bypass relay in boost chopper circuit |
| CN113485303A (en) * | 2021-07-22 | 2021-10-08 | 东风汽车集团股份有限公司 | EPS controller power supply relay actuation optimization control method and system |
| CN114582670A (en) * | 2022-03-07 | 2022-06-03 | 潍柴动力股份有限公司 | Method and system for judging aging of relay and preventing excessive heating of grating |
-
2013
- 2013-08-21 CN CN201320511879.7U patent/CN203445063U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413729A (en) * | 2013-08-21 | 2013-11-27 | 广东易事特电源股份有限公司 | Circuit preventing relay from adhering |
| CN104576206A (en) * | 2015-01-19 | 2015-04-29 | 国家电网公司 | Spark control device of alternating current contactor |
| CN104616926A (en) * | 2015-02-06 | 2015-05-13 | 孙毅彪 | Non-arc, series and intelligent bridge type high-voltage circuit breaker |
| CN104820183A (en) * | 2015-05-15 | 2015-08-05 | 阳光电源股份有限公司 | Method and device for detecting on/off of bypass relay in boost chopper circuit |
| CN113485303A (en) * | 2021-07-22 | 2021-10-08 | 东风汽车集团股份有限公司 | EPS controller power supply relay actuation optimization control method and system |
| CN113485303B (en) * | 2021-07-22 | 2022-09-13 | 东风汽车集团股份有限公司 | EPS controller power supply relay actuation optimization control method and system |
| CN114582670A (en) * | 2022-03-07 | 2022-06-03 | 潍柴动力股份有限公司 | Method and system for judging aging of relay and preventing excessive heating of grating |
| CN114582670B (en) * | 2022-03-07 | 2024-05-17 | 潍柴动力股份有限公司 | Method and system for judging ageing of relay and preventing grid from being overheated |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |