CN104599901A - Detection circuit used for contactor - Google Patents
Detection circuit used for contactor Download PDFInfo
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- CN104599901A CN104599901A CN201510057087.0A CN201510057087A CN104599901A CN 104599901 A CN104599901 A CN 104599901A CN 201510057087 A CN201510057087 A CN 201510057087A CN 104599901 A CN104599901 A CN 104599901A
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Abstract
The invention discloses a detection circuit used for a contactor. The detection circuit comprises the contact, a switch and a controller, wherein the contactor is used for generating an output signal according to a control signal, the switch is connected to the contactor and used for converting the output signal of the contactor into a switch signal, and the controller is connected between the contactor and the switch and is used for outputting a control signal to the contactor, receiving a the switch signal which is fed back, and detecting whether adhesion happens to the contactor or not according to the output control signal and the received switch signal. By means of the detection circuit, the problem that in the prior art, whether adhesion happens to the contactor or not can not be accurately determined is solved, and loads are effectively protected.
Description
Technical field
The present invention relates to circuit field, in particular to a kind of testing circuit for contactor.
Background technology
In circuit, the excessive or contactor self of electric current to damage etc. and all can cause contactor adhesion, and contactor adhesion then can directly cause the important load such as motor, compressor in circuit to damage.
In the related, in order to alleviate the economic loss that contactor adhesion brings, when circuit design, the general contactor adopted with auxiliary contact, and determine whether contactor occurs adhesion by the auxiliary contact that detect contactor and other normal contacts.Due to only when the whole action of other normal contacts, auxiliary contact just can determine action, and when only having partial act in other normal contacts, auxiliary contact action situation is uncertain.Therefore, technique scheme cannot determine contactor whether adhesion exactly, and then the important load in circuit cannot be avoided damaged.。
Such as, for the contactor be arranged in main circuit, suppose that this contactor has 3 pairs of normal contacts, be respectively: 1 ' and 2 ', 3 ' and 4 ', 5 ' and 6 ', they are separately positioned in different phase lines, and a pair auxiliary contact 7 ' and 8 ', when implementing, if contact 1 ' and 2 ' and 3 ' and 4 ' adhesive, and contact 5 ' and 6 ' disconnects, then auxiliary contact 7 ' and 8 ' state uncertain, therefore, contactor whether adhesion cannot be determined exactly.
For the problem cannot determining contactor whether adhesion in correlation technique exactly, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is to provide a kind of testing circuit for contactor, cannot determine contactor whether adhesion problems exactly to solve in correlation technique.
To achieve these goals, according to an aspect of the present invention, a kind of testing circuit for contactor is provided.This circuit comprises: contactor, for according to control signal generating output signal; Switch, is connected to above-mentioned contactor, for the above-mentioned output signal of above-mentioned contactor is converted to switching signal; And controller, be connected between above-mentioned contactor and above-mentioned switch, for exporting above-mentioned control signal to above-mentioned contactor, and receive the switching signal of above-mentioned switch feedback, and detect the whether adhesion of above-mentioned contactor according to the control signal exported and the switching signal of reception.
Further, the whether adhesion of above-mentioned contactor is detected according to the control signal exported and the switching signal of reception in the following manner: judge whether above-mentioned control signal is contactor open circuit control signal; If judge that above-mentioned control signal is above-mentioned contactor open circuit control signal, then judge whether above-mentioned switching signal is high level signal; If judge that above-mentioned switching signal is above-mentioned high level signal, then determine above-mentioned contactor adhesion; If and/or judge that above-mentioned switching signal is low level signal, then determine that above-mentioned contactor is normal.
Further, above-mentioned switch comprises: relay.
Further, above-mentioned relay is auxiliary relay, and above-mentioned auxiliary relay comprises: the first auxiliary relay, is connected between the first-phase line output terminal of above-mentioned contactor and above-mentioned controller; And second auxiliary relay, be connected between the second-phase line output terminal of above-mentioned contactor and above-mentioned controller, wherein, above-mentioned first-phase line output terminal is different from above-mentioned second-phase line output terminal, and above-mentioned first-phase line output terminal and above-mentioned second-phase line output terminal are the arbitrary phase line output terminal in three-phase output end.
Further, above-mentioned first auxiliary relay comprises: the first coil-end and the first contact end, above-mentioned first coil-end is connected to the first-phase line output terminal of above-mentioned contactor, above-mentioned first contact end is connected to above-mentioned controller, above-mentioned second auxiliary relay comprises: the second coil-end and the second contact end, above-mentioned second coil-end is connected to the second-phase line output terminal of above-mentioned contactor, above-mentioned second contact end is connected to above-mentioned controller, wherein, above-mentioned first contact end and above-mentioned second contact end parallel connection.
Further, above-mentioned first auxiliary relay comprises: the first coil-end and the first contact end, above-mentioned first coil-end is connected to the first-phase line output terminal of above-mentioned contactor, the two ends of above-mentioned first contact end are connected to the first port and second port of above-mentioned controller respectively, above-mentioned second auxiliary relay comprises: the second coil-end and the second contact end, above-mentioned second coil-end is connected to the second-phase line output terminal of above-mentioned contactor, the two ends of above-mentioned second contact end are connected to above-mentioned controller the 3rd port and the 4th port respectively, wherein, above-mentioned first port, above-mentioned second port, above-mentioned 3rd port and above-mentioned 4th port are different director ports.
Further, above-mentioned auxiliary relay also comprises: the 3rd auxiliary relay, is connected between the third phase line output terminal of above-mentioned contactor and above-mentioned controller, wherein, above-mentioned third phase line output terminal is different from above-mentioned first-phase line output terminal, and is different from above-mentioned second-phase line output terminal.
Further, the testing circuit for contactor also comprises: circuit protection parts, is connected to above-mentioned controller, and for when above-mentioned contactor adhesion, the load in protection main circuit, above-mentioned load is connected to above-mentioned contactor, controls by above-mentioned contactor.
Further; foregoing circuit guard block comprises: circuit breaker; be connected between above-mentioned contactor and above-mentioned controller; there are shunted exciter tripping parts; wherein, when above-mentioned contactor adhesion, above-mentioned controller generates shunted exciter tripping signal; above-mentioned shunted exciter tripping signal, for controlling above-mentioned circuit breaker tripping, makes above-mentioned contactor be forced open circuit.
Further, foregoing circuit guard block also comprises: alarm, is connected to above-mentioned controller, and wherein, when above-mentioned contactor adhesion, above-mentioned controller controls above-mentioned alarm and generates alarm signal.
By the present invention, adopt contactor, for according to control signal generating output signal; Switch, is connected to contactor, for the output signal of contactor is converted to switching signal; And controller, be connected between contactor and switch, for exporting control signal to contactor, and the switching signal of receiving key feedback, and detect contactor whether adhesion according to the switching signal of the control signal exported and reception, solve in correlation technique the problem cannot determining contactor whether adhesion exactly, and then reach and judge contactor whether adhesion effect in time, exactly.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the circuit structure diagram of the testing circuit for contactor according to the embodiment of the present invention; And
Fig. 2 is the circuit structure diagram of the preferred testing circuit for contactor according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The application's scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the embodiment of the application's part, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
It should be noted that, term " first ", " second " etc. in the specification of the application and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that the embodiment of the application described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of a series of unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to embodiments of the invention, provide a kind of testing circuit for contactor.
Fig. 1 is the circuit structure diagram of the testing circuit for contactor according to the embodiment of the present invention.As shown in Figure 1, this circuit comprises: contactor 10, switch 20 and controller 30.
Contactor 10 is for according to control signal generating output signal.Such as, under normal circumstances, when inputting the control signal for controlling its connection to contactor 10, coil electricity in contactor 10, its contact becomes attracting state from off-state, and now, contactor 10 becomes on-state from off-state, and export the signal of telecommunication, the load in main circuit is normally worked; When inputting the control signal for controlling its disconnection to contactor 10, the coil losing electricity in contactor 10, its contact becomes off-state from attracting state, now, contactor 10 becomes off-state from on-state, and no longer exports the signal of telecommunication, and the load in main circuit is quit work.And in abnormal cases, such as, excessive or own fault of contactor 10 of electric current in main circuit etc., contactor 10 can be caused normally cannot to disconnect according to control signal, also be, adhesion phenomenon is there is in contactor 10 owing to cannot normally disconnect, now, although have input the control signal disconnected for controlling it to contactor 10, but because the electric current in main circuit is excessive or the failure and other reasons of contactor 10 own, the contact of contactor 10 is still in attracting state, thus contactor 10 is still in on-state, and then the load of having shut down in main circuit is burnt out owing to being in dry-fire condition.It should be noted that, contactor 10 is A.C. contactor.
Switch 20 is connected to contactor 10, for the output signal of contactor 10 is converted to switching signal.Such as, when switch 20 is normal open switch, if the output signal that contactor 10 exports is low level signal, that is, when contactor 10 disconnects, then the switching signal that switch 20 exports also is low level signal; If the output signal that contactor 10 exports is high level signal, that is, when contactor 10 is connected, then the switching signal that switch 20 exports is high level signal.It should be noted that, switching signal can directly feed back in controller 30 by switch 20, like this, the switching signal that controller 30 can feed back according to the control signal of the state for control contactor 10 of self output and switch 20 judges whether contactor 10 occurs adhesion state.
During enforcement, controller 30 is connected between contactor 10 and switch 20, for exporting control signal to contactor 10, and the switching signal that receiving key 20 feeds back, and detects contactor 10 whether adhesion according to the switching signal of the control signal exported and reception.Wherein, controller 30 detect contactor 10 whether adhesion time, can judge that whether the switching signal received consistent with the control result of the control signal that self exports, if unanimously, then show that contactor 10 is normally, does not occur adhesion; If inconsistent, then show that contactor 10 is abnormal, may occur adhesion.It should be noted that, controller 30 can be arranged on the master control borad of complete machine.
By the embodiment of the present invention, because switching signal can link along with the output signal of contactor, with direct-detection with the contactor of auxiliary contact each contacts status compared with, reach and can determine contactor whether adhesion in time, exactly.
Preferably, in embodiments of the present invention, contactor whether adhesion can be detected according to the switching signal of the control signal exported and reception in the following manner:
S2, judges whether control signal is contactor open circuit control signal, also, judges that whether control signal is the signal for control contactor open circuit.
S4, if judge that control signal is contactor open circuit control signal, then judges whether switching signal is high level signal further.Because under normal circumstances, contactor can open circuit under the control of contactor open circuit control signal, now, the output of contactor due to ground connection output low level voltage signal.But, if contactor adhesion, even if to contactor output contactor open circuit control signal, contactor also can not open circuit, cause output high level voltage signal, therefore, by judging that whether switching signal is that high level voltage signal can determine contactor whether adhesion further.
S6, if judge that switching signal is high level voltage signal, then determines contactor adhesion.And/or S8, if judge that switching signal is low level voltage signal, then determines that contactor is normal.
It should be noted that, in embodiments of the present invention, be that normal open switch is of the present invention for example elaborates with switch.
Pass through the embodiment of the present invention, due to contactor adhesion generally occur in want control contactor disconnect and in fact contactor cannot normally disconnect time, therefore, formerly judge whether control signal is under the prerequisite of contactor open circuit control signal, judge whether switching signal is high level voltage signal, can improve the accuracy of detection efficiency and testing result again.
It should be noted that, in embodiments of the present invention, above-mentioned switch 20 can be contactor or relay.Due to compared with contactor, the cost of relay is lower, therefore, preferably, in embodiments of the present invention, relay can be selected as switch 20 herein.Wherein, the type of relay comprises multiple, and such as, it can comprise: auxiliary relay.
The present invention is elaborated for auxiliary relay below for switch 20.
Wherein, when implementing, auxiliary relay can comprise 2 or 3.When it comprises 2, the input of these 2 auxiliary relays can be connected to the output of any two-phase of contactor respectively, and when it comprises 3, the input of these 3 auxiliary relays can be connected to the output of the three-phase of contactor respectively.
When auxiliary relay comprises 2, as shown in Figure 2, auxiliary relay can comprise: the first auxiliary relay 202 and the second auxiliary relay 204.First auxiliary relay 202 is connected between the first-phase line output terminal of contactor 10 and controller 30; And second auxiliary relay 204 be connected between the second-phase line output terminal of contactor 10 and controller 30, wherein, first-phase line output terminal is different from second-phase line output terminal, also be, first-phase line output terminal and second-phase line output terminal are two different phase line output terminals, and first-phase line output terminal and second-phase line output terminal are the arbitrary phase line output terminal in three-phase output end.
Such as, suppose that the first auxiliary relay 202 is connected between the A phase output terminal of contactor 10 and controller 30; Second auxiliary relay 204 is connected between the B phase output terminal of contactor 10 and controller 30, and like this, if the A phase contact adhesion of contactor 10, then the coil of the first auxiliary relay 202 obtains electric, thus its contact changes attracting state into; In like manner, if the B phase contact adhesion of contactor 10, then the coil of the second auxiliary relay 204 obtains electric, thus its contact changes attracting state into; If A, B phase contact adhesion of contactor 10, then the coil of the first auxiliary relay 202 and the second auxiliary relay 204 all electric, thus it changes attracting state in contact separately.
Further preferably, in embodiments of the present invention, as shown in Figure 2, first auxiliary relay 202 can comprise: the first coil-end 2022 and the first contact end 2024, first coil-end 2022 is connected to the first-phase line output terminal of contactor 10, first contact end 2024 is connected to controller 30, second auxiliary relay 204 can comprise: the second coil-end 2042 and the second contact end 2044, second coil-end 2042 is connected to the second-phase line output terminal of contactor 10, second contact end 2044 is connected to controller 30, wherein, first contact end 2024 and the parallel connection of the second contact end 2044.
Like this, as long as the switching signal of any one auxiliary relay is Closing Switch signal, then controller 30 all can detect switching signal, and then can determine that contactor 10 sticks together.And if the switching signal of all auxiliary relays is off switching signal, then controller 30 all can not detect switching signal, and then can determine that contactor 10 does not stick together.After contactor 10 sticks together, system can produce alarm signal, or can cut off the power supply in main circuit; such as, the power supply cut off in main circuit can be disconnected, the important load in protective circuit by the air switch controlled in main circuit; prevent it to be burned, reduce economic loss.In addition, the first contact end 2024 and the second contact end 2044 are connected in parallel on the corresponding port of controller 30, can save the interface resource of controller 30.
Preferably, in embodiments of the present invention, first auxiliary relay can comprise: the first coil-end and the first contact end, first coil-end is connected to the first-phase line output terminal of contactor, the two ends of the first contact end are connected to the first port and second port of controller respectively, second auxiliary relay can comprise: the second coil-end and the second contact end, second coil-end is connected to the second-phase line output terminal of contactor, the two ends of the second contact end are connected to controller the 3rd port and the 4th port respectively, wherein, first port, second port, 3rd port and the 4th port are different director ports.
By the embodiment of the present invention, as long as the switching signal of any one auxiliary relay is Closing Switch signal, then controller 30 all can detect switching signal, and then can determine that contactor 10 sticks together.And if the switching signal of all auxiliary relays is off switching signal, then controller 30 all can not detect switching signal, and then can determine that contactor 10 does not stick together.After contactor 10 sticks together, system can produce alarm signal, or can cut off the power supply in main circuit; such as, the power supply cut off in main circuit can be disconnected, the important load in protective circuit by the air switch controlled in main circuit; prevent it to be burned, reduce economic loss.In addition, first contact end 2024 and the second contact end 2044 are connected on the different port of controller 30, while determining that contactor 10 sticks together, can conclude contactor specifically there occurs adhesion in which phase line exactly, but as compared to the connected mode of the first contact end 2024 with the second contact end 2044 parallel connection, connected mode herein needs to consume more controller 30 interface resource.
When auxiliary relay comprises 3, auxiliary relay can comprise: the first auxiliary relay and the second auxiliary relay and the 3rd auxiliary relay.First auxiliary relay is connected between the first-phase line output terminal of contactor and controller; Second auxiliary relay is connected between the second-phase line output terminal of contactor and controller, 3rd auxiliary relay is connected between the third phase line output terminal of contactor and controller, wherein, third phase line output terminal is different from first-phase line output terminal, and be different from second-phase line output terminal, also namely, first, second and third phase line output terminal is respectively three different phase line output terminals.
Such as, suppose that the first auxiliary relay is connected between the A phase output terminal of contactor and controller; Second auxiliary relay is connected between the B phase output terminal of contactor and controller, 3rd auxiliary relay is connected between the C phase output terminal of contactor and controller, like this, if the A phase contact adhesion of contactor, then the coil of the first auxiliary relay obtains electric, thus its contact changes attracting state into; In like manner, if the B phase contact adhesion of contactor, then the coil of the second auxiliary relay obtains electric, thus its contact changes attracting state into; If the C phase contact adhesion of contactor, then the coil of the 3rd auxiliary relay obtains electric, thus its contact changes attracting state into; If any two-phase in A, B, C phase contact of contactor or three-phase contact adhesion, then the contact of corresponding auxiliary relay will change attracting state into.
It should be noted that, when to only have in contactor the contact at least two-phase to stick together, just can form loop, just can cause damage to the load in main circuit.
Preferably, in embodiments of the present invention, the above-mentioned testing circuit for contactor can also comprise: circuit protection parts.Circuit protection parts are connected to controller, and for when contactor adhesion, the load in protection main circuit, load is connected to contactor, controls by contactor.Particularly, under normal circumstances, when contactor closes, load is started shooting, and opens mode of operation; When contactor disconnects, load is shut down, and enters shutdown mode.
Further preferably, in embodiments of the present invention, as shown in Figure 2, circuit protection parts can comprise: circuit breaker 40.Circuit breaker 40 is connected between contactor 10 and controller 30, there are shunted exciter tripping parts 402, wherein, when contactor 10 adhesion, controller 30 can generate shunted exciter tripping signal, this shunted exciter tripping signal may be used for the dropout controlling circuit breaker 40, thus makes contactor 10 be forced open circuit, like this, when contactor 10 adhesion, can main circuit be disconnected, prevent the important load in main circuit, as motor and compressor etc. are damaged.
Further preferably, in embodiments of the present invention, circuit protection parts can also comprise: alarm, are connected to controller, and wherein, when contactor adhesion, controller controls alarm and generates alarm signal.Like this, staff can after receiving warning, on-call maintenance or change corresponding contactor.
The present invention is elaborated below with a specific embodiment.
Contactor can comprise 3 contacts pair, be respectively: a, b contact pair, c, d contact pair, e, f contact pair, when implementing, controller on complete machine master control borad exports the coil that control signal controls the A.C. contactor in main circuit, the contact b of A.C. contactor output and f place each connection auxiliary relay, and the switching signal at the normally opened contact place of 2 auxiliary relays is fed back to master control borad.
Under normal circumstances, when the control signal that master control borad exports is contactor disconnection control signal, A.C. contactor should switch to off-state, auxiliary relay on corresponding master control borad also should switch to off-state, otherwise, if master control borad auxiliary relay is disconnected closure state, then judge contactor adhesion.
Also be; the contact b of contactor and the voltage signal at f place, contact is detected respectively by 2 auxiliary relays; to judge the attracting state of contactor; when the on off state of any one auxiliary relay and the due state of contactor inconsistent time; judge contactor adhesion, controller is by controlling main circuit breaker tripping operation to protect motor or compressor.
Wherein, after the adhesion of judgement contactor; need to perform adhesion protection; now; controller on master control borad can export shunted exciter tripping signal and thread off with the shunted exciter tripping parts controlled on circuit breaker; main circuit breaker is tripped, thus the important load such as motor or compressor is separated with main circuit, reach the object of protection important load.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. for a testing circuit for contactor, it is characterized in that, comprising:
Contactor, for according to control signal generating output signal;
Switch, is connected to described contactor, for the output signal of described contactor is converted to switching signal; And
Controller, be connected between described contactor and described switch, for exporting described control signal to described contactor, and receive the switching signal of described switch feedback, and detect the whether adhesion of described contactor according to the control signal exported and the switching signal of reception.
2. the testing circuit for contactor according to claim 1, is characterized in that, detects the whether adhesion of described contactor in the following manner according to the control signal exported and the switching signal of reception:
Judge whether described control signal is contactor open circuit control signal;
If judge that described control signal is described contactor open circuit control signal, then judge whether described switching signal is high level signal;
If judge that described switching signal is described high level signal, then determine described contactor adhesion; And/or
If judge that described switching signal is low level signal, then determine that described contactor is normal.
3. the testing circuit for contactor according to claim 1, is characterized in that, described switch comprises: relay.
4. the testing circuit for contactor according to claim 3, is characterized in that, described relay is auxiliary relay, and described auxiliary relay comprises:
First auxiliary relay, is connected between the first-phase line output terminal of described contactor and described controller; And
Second auxiliary relay, is connected between the second-phase line output terminal of described contactor and described controller,
Wherein, described first-phase line output terminal is different from described second-phase line output terminal, and described first-phase line output terminal and described second-phase line output terminal are the arbitrary phase line output terminal in three-phase output end.
5. the testing circuit for contactor according to claim 4, is characterized in that,
Described first auxiliary relay comprises: the first coil-end and the first contact end, and described first coil-end is connected to the first-phase line output terminal of described contactor, and described first contact end is connected to described controller,
Described second auxiliary relay comprises: the second coil-end and the second contact end, and described second coil-end is connected to the second-phase line output terminal of described contactor, and described second contact end is connected to described controller,
Wherein, described first contact end and described second contact end parallel connection.
6. the testing circuit for contactor according to claim 4, is characterized in that,
Described first auxiliary relay comprises: the first coil-end and the first contact end, and described first coil-end is connected to the first-phase line output terminal of described contactor, and the two ends of described first contact end are connected to the first port and second port of described controller respectively,
Described second auxiliary relay comprises: the second coil-end and the second contact end, and described second coil-end is connected to the second-phase line output terminal of described contactor, and the two ends of described second contact end are connected to described controller the 3rd port and the 4th port respectively,
Wherein, described first port, described second port, described 3rd port and described 4th port are different director ports.
7. the testing circuit for contactor according to claim 4, is characterized in that, described auxiliary relay also comprises:
3rd auxiliary relay, is connected between the third phase line output terminal of described contactor and described controller,
Wherein, described third phase line output terminal is different from described first-phase line output terminal, and is different from described second-phase line output terminal.
8. the testing circuit for contactor according to claim 1, is characterized in that, also comprise: circuit protection parts; be connected to described controller, for when described contactor adhesion, the load in protection main circuit; described load is connected to described contactor, controls by described contactor.
9. the testing circuit for contactor according to claim 8, is characterized in that, described circuit protection parts comprise: circuit breaker, are connected between described contactor and described controller, have shunted exciter tripping parts,
Wherein, when described contactor adhesion, described controller generates shunted exciter tripping signal, and described shunted exciter tripping signal, for controlling described circuit breaker tripping, makes described contactor be forced open circuit.
10. the testing circuit for contactor according to claim 9, is characterized in that, described circuit protection parts also comprise: alarm, are connected to described controller,
Wherein, when described contactor adhesion, described controller controls described alarm and generates alarm signal.
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| CN201510057087.0A CN104599901B (en) | 2015-02-03 | 2015-02-03 | Detection circuit used for contactor |
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| CN201510057087.0A CN104599901B (en) | 2015-02-03 | 2015-02-03 | Detection circuit used for contactor |
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| CN105332902A (en) * | 2015-12-01 | 2016-02-17 | 珠海格力电器股份有限公司 | Compressor relay adhesion protection method, compressor relay adhesion protection device and air conditioner |
| CN106199409A (en) * | 2016-06-28 | 2016-12-07 | 苏州汇川技术有限公司 | High voltage electric equipment catalyst adhesion detecting system and method |
| CN108437818A (en) * | 2018-02-27 | 2018-08-24 | 北京新能源汽车股份有限公司 | A kind of charging pile control system |
| CN109596940A (en) * | 2018-12-29 | 2019-04-09 | 蜂巢能源科技有限公司 | The detection device of power battery charging contacts of contactor adhesion, vehicle |
| CN110148544A (en) * | 2019-05-05 | 2019-08-20 | 北京新能源汽车股份有限公司 | Prevent the method and system of relay adhesion |
| WO2020001054A1 (en) * | 2018-06-28 | 2020-01-02 | 深圳光峰科技股份有限公司 | Power supply circuit control module |
| CN110907813A (en) * | 2019-12-10 | 2020-03-24 | 东风航盛（武汉）汽车控制系统有限公司 | Diagnosis method for relay in battery management system |
| CN114498555A (en) * | 2022-02-11 | 2022-05-13 | 北大方正集团有限公司 | Prevent dry combustion method protection circuit |
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