CN202794463U - Detection device for main contact fault of high-voltage direct current contactor - Google Patents
Detection device for main contact fault of high-voltage direct current contactor Download PDFInfo
- Publication number
- CN202794463U CN202794463U CN 201220504425 CN201220504425U CN202794463U CN 202794463 U CN202794463 U CN 202794463U CN 201220504425 CN201220504425 CN 201220504425 CN 201220504425 U CN201220504425 U CN 201220504425U CN 202794463 U CN202794463 U CN 202794463U
- Authority
- CN
- China
- Prior art keywords
- voltage
- contactor
- auxiliary contact
- main contacts
- fault
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Keying Circuit Devices (AREA)
Abstract
The utility model discloses a detection device for main contact faults of a high-voltage direct current contactor. The detection device comprises a first control unit, a detection unit, a determining unit, and a first sending unit. The first control unit is used to control to cut off voltage applied on two ends of a direct current contactor coil when a first direct current power supply is needed to stop supplying power for an electric device. The detection unit is used to detect voltage on two ends of a secondary contact. The determining unit is used to determine whether voltage on the two ends of the secondary contact is a set voltage which is a quotient of second direct current power voltage and a dropping resistance. The first sending unit is used to send a first alerting signal when the detection unit determines that voltage on the two ends of the secondary contact is not the set voltage, and is used to characterize a main contact of the direct current contactor has adhesion faults. The detection device can also detect mechanical jamming faults of the main contact of the high-voltage direct current contactor.
Description
Technical field
The utility model relates to the high voltage dc transmission technology field, relates in particular to a kind of pick-up unit of high-voltage DC contactor main contacts fault.
Background technology
D.C. contactor is a kind of control apparatus that utilizes the connection of low-voltage circuit far distance controlled high direct voltage electric line and disjunction, be mainly used in remote the connection and the disjunction DC circuit, by the break-make of control DC circuit can realize direct current motor frequent starting, stop, counter-rotating and reversing braking, it also is used for switching on and off continually the solenoid etc. of lifting electromagnet, solenoid valve, clutch coupling.
The operating voltage of D.C. contactor is larger, during, frequent operation abominable in environment for use, often because of mechanical fatigue or moment electric arc, cause the main contacts adhesion to disconnect.Described main contacts adhesion refers to and should be integral because of the metal molten adhesion relatively movable contact, is usually caused by two kinds of reasons: 1) main contacts causes contact resistance to increase in conjunction with insufficient pressure, and the heating of place, contact causes metal molten during long-term work; The main contacts action formed electric arc when 2) large electric current was by main contacts between the contact, caused place, contact metal molten.
In addition, D.C. contactor also often because of mechanical fatigue or when dispatching from the factory mismachining tolerance cause more greatly main contacts often to be opened, namely main contacts machinery stuck, can't closed phenomenon.
Because the D.C. contactor fault will directly cause consumer also can cause security incident under special occasions by demand work, and maintenance the time need to check once that to whole electrical system the troubleshooting time of cost is longer.If can judge fast the D.C. contactor duty, then can when the system failure, locate fast abort situation, shorten the repair time, reduce to hinder for some reason the loss that brings.
But, the prior art scheme only can be judged the faults such as operation circuit opens circuit, short circuit, can't monitor and judge specific fault such as the adhesion fault of relay main contacts or mechanical stuck faults, therefore, can't fast, correctly determine failure cause and location abort situation.
The utility model content
In view of this, fundamental purpose of the present utility model is to provide a kind of pick-up unit of high-voltage DC contactor main contacts fault, to realize judging accurately whether the D.C. contactor main contacts sticks together or the purpose of mechanical stuck fault.
For achieving the above object, the invention provides a kind of pick-up unit of high-voltage DC contactor main contacts fault, it is characterized in that, the main contacts two ends of described D.C. contactor respectively with consumer be connected direct supply and be connected, described consumer is connected with described the first direct supply; The auxiliary contact two ends of described D.C. contactor respectively with dropping resistor be connected direct supply and be connected, described dropping resistor is connected with described the second direct supply, described auxiliary contact are along with described main contacts links, described device comprises:
The first control module is used for when described the first direct supply of needs stops as described consumer power supply, and control disconnects the voltage that is applied to described D.C. contactor coil two ends;
Detecting unit is for detection of the voltage at described auxiliary contact two ends;
Judging unit is used for judging whether the voltage at described auxiliary contact two ends is setting voltage, and described setting voltage is the merchant of described the second direct supply voltage and described dropping resistor;
The first transmitting element when being not setting voltage for the voltage at the described auxiliary contact two ends that described judgment unit judges obtains, sends the first alerting signal, adhesion fault occurs in order to the main contacts that characterizes described D.C. contactor.
Preferably, said apparatus also comprises:
The second control module is used for when described consumer needs work, and the voltage that is applied to described D.C. contactor coil two ends is connected in control;
Described detecting unit is also for detection of the voltage at described auxiliary contact two ends;
Described judging unit also is used for judging whether the voltage at described auxiliary contact two ends is setting voltage;
The second transmitting element when being described setting voltage for the voltage at the described auxiliary contact two ends that described judgment unit judges obtains, sends the second alerting signal, mechanical stuck fault occurs in order to the main contacts that characterizes described D.C. contactor.
Preferably, said apparatus also comprises:
The 3rd transmitting element, be used for being applied to when disconnection the voltage at described D.C. contactor coil two ends, and when the voltage at the described auxiliary contact two ends that described judgment unit judges obtains is described setting voltage, send the first safety signal, adhesion fault do not occur in order to the main contacts that characterizes described D.C. contactor.
Preferably, said apparatus also comprises:
The 4th transmitting element, be used for being applied to when connection the voltage at described D.C. contactor coil two ends, and the voltage at the described auxiliary contact two ends that described judgment unit judges obtains is not described setting voltage, send the second safety signal, mechanical stuck fault do not occur in order to the main contacts that characterizes described D.C. contactor.
Preferably, in said apparatus, be provided with mechanical linkage between the main contacts of described D.C. contactor and the auxiliary contact, so that described auxiliary contact engage simultaneously with described main contacts or disconnect.
As seen, detection method and the device of the utility model high-voltage DC contactor main contacts fault, when stopping (needs) for described consumer power supply, disconnect the voltage that (joint) is applied to described D.C. contactor coil two ends by control, detect again the voltage at described auxiliary contact two ends, when the voltage at auxiliary contact two ends is zero (for setting voltage), show that the auxiliary contact that should be in disconnection (joint) state have become joint (disconnection) state, and then can know that main contacts also is in joint (disconnection) state, namely adhesion fault (mechanical stuck fault) has appearred in the main contacts of D.C. contactor.As seen, utilize D.C. contactor main contacts-auxiliary contact link gear, detect by the adhesion fault (mechanical stuck fault) to D.C. contactor main contacts in the low-voltage circuit, just can judge the working condition of current high-tension line, and the high-voltage signal that need not to obtain output is judged the system failure, and the security that the system that guaranteed detects is simultaneously because adopting low-voltage signal to reduce the signal intractability, reduced testing cost, and avoided consumer itself is carried out fault detect.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structure principle chart of original D.C. contactor;
Fig. 2 is the structure principle chart of the improved D.C. contactor of the utility model;
Fig. 3 is the systematic schematic diagram that the utility model detects high-voltage DC contactor main contacts fault;
Fig. 4 is the structural representation of embodiment 1 of the pick-up unit of the utility model high-voltage DC contactor main contacts fault;
Fig. 5 is the structural representation of embodiment 2 of the pick-up unit of the utility model high-voltage DC contactor main contacts fault.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Referring to shown in Figure 1, Fig. 1 is the structure principle chart of original D.C. contactor, in the high-voltage direct-current circuit, usually connect with D.C. contactor and minute deenergizing, during, frequent operation abominable in environment for use, the main contacts 1 of D.C. contactor often adhesion fault occurs and causes system to quit work, or the mechanical stuck fault of D.C. contactor main contacts 1 frequent appearance causes circuit can't connect or operation irregularity.The utility model adds auxiliary contact and mechanical linkage on the basis of original D.C. contactor shown in Figure 1, obtain improved D.C. contactor shown in Figure 2, the structure principle chart of the improved D.C. contactor that Fig. 2 provides for the utility model, be provided with mechanical linkage between the main contacts 1 of described D.C. contactor and the auxiliary contact 2, so that the simultaneously combination of described auxiliary contact and described main contacts or disconnection.
Referring to shown in Figure 3, the systematic schematic diagram of the detection high-voltage DC contactor main contacts fault that Fig. 3 provides for the utility model, the utility model increases D.C. contactor interlock auxiliary contact in original D.C. contactor, and designed corresponding control strategy and judged whether D.C. contactor exists fault, between D.C. contactor auxiliary contact and main contacts, be designed with the positive mechanical coupling arrangement, so that auxiliary contact and main contacts link all the time, be that auxiliary contact are followed main contacts motion (main contacts is engaged, and auxiliary contact engage simultaneously; Main contacts disconnects, and auxiliary contact disconnect simultaneously).
In the situation of said system normal operation, namely when consumer needs work, apply the voltage of Ua=U1 ≠ 0 at D.C. contactor coil two ends, then main contacts engages, auxiliary contact also engage simultaneously, detect the voltage U b=0 at the auxiliary contact two ends that obtain this moment; In the time of need to disconnecting consumer, apply the voltage of Ua=0 at D.C. contactor coil two ends, then main contacts disconnects, and auxiliary contact also disconnect simultaneously, the voltage U b=U2 at the auxiliary contact two ends that at this moment detection obtains ≠ 0.
Referring to shown in Figure 4, the structural representation of the embodiment 1 of the pick-up unit of a kind of high-voltage DC contactor main contacts fault that Fig. 4 provides for the utility model, the main contacts two ends of described D.C. contactor respectively with consumer be connected direct supply and be connected, described consumer is connected with described the first direct supply; The auxiliary contact two ends of described D.C. contactor respectively with dropping resistor be connected direct supply and be connected, described dropping resistor is connected with described the second direct supply, described auxiliary contact are along with described main contacts links, described device comprises:
The first control module 1, be used for when described the first direct supply of needs stops as described consumer power supply, control disconnects the voltage U a that is applied to described D.C. contactor coil two ends, and purpose is that the main contacts of described D.C. contactor and auxiliary contact are disconnected simultaneously.
Control disconnects the voltage U a that is applied to described D.C. contactor coil two ends shown in Figure 3, that is: when disconnecting consumer, the voltage at described coil two ends becomes Ua=0 by Ua=U1.In normal operation, the main contacts of D.C. contactor and auxiliary contact should disconnect simultaneously, the voltage U b=U2 at auxiliary contact two ends ≠ 0.
Detecting unit 2 is for detection of the voltage U b at described auxiliary contact two ends.
The first transmitting element 4 is used for sending the first alerting signal when described judging unit 3 judges that the voltage at the described auxiliary contact two ends that obtain is not setting voltage U2, adhesion fault occurs in order to the main contacts that characterizes described D.C. contactor.
When disconnecting consumer, after control disconnects and is applied to the voltage U a at D.C. contactor coil two ends, the main contacts of D.C. contactor under normal circumstances and auxiliary contact should disconnect simultaneously, and when adhesion fault appears in main contacts, be that main contacts will be in engagement state, auxiliary contact also are in engagement state, at this moment, voltage U b by detecting the auxiliary contact two ends can judge that not for setting voltage U2 is always at 0 o'clock adhesion fault appears in main contacts.
In addition, be provided with mechanical linkage between the main contacts of described D.C. contactor and the auxiliary contact, so that the simultaneously combination of described auxiliary contact and described main contacts or disconnection.
The pick-up unit of the utility model high-voltage DC contactor main contacts fault, when stopping as described consumer power supply, disconnect the voltage that is applied to described D.C. contactor coil two ends by control, detect again the voltage at described auxiliary contact two ends, when the voltage at auxiliary contact two ends is zero, show that the auxiliary contact that should be in off-state have become engagement state, and then can know that main contacts also is in engagement state, namely adhesion fault has appearred in the main contacts of D.C. contactor.As seen, utilize D.C. contactor main contacts-auxiliary contact link gear, detect by the adhesion fault to D.C. contactor main contacts in the low-voltage circuit, just can judge the working condition of current high-tension line, and the high-voltage signal that need not to obtain output is judged the system failure, and the security that the system that guaranteed detects is simultaneously because adopting low-voltage signal to reduce the signal intractability, reduced testing cost, and avoided consumer itself is carried out fault detect.
Referring to shown in Figure 5, the structural representation of the embodiment 2 of the pick-up unit of a kind of high-voltage DC contactor main contacts fault that Fig. 5 provides for the utility model, the main contacts two ends of described D.C. contactor respectively with consumer be connected direct supply and be connected, described consumer is connected with described the first direct supply; The auxiliary contact two ends of described D.C. contactor respectively with dropping resistor be connected direct supply and be connected, described dropping resistor is connected with described the second direct supply, described auxiliary contact are along with described main contacts links, described device comprises:
The first control module 1 is used for when described the first direct supply of needs stops as described consumer power supply, and control disconnects the voltage U a that is applied to described D.C. contactor coil two ends, so that the main contacts of described D.C. contactor and auxiliary contact disconnect simultaneously.
Detecting unit 2 is for detection of the voltage U b at described auxiliary contact two ends.
The first transmitting element 4 is used for sending the first alerting signal when described judging unit 3 judges that the voltage U b at the described auxiliary contact two ends that obtain is not setting voltage U2, adhesion fault occurs in order to the main contacts that characterizes described D.C. contactor.
The 3rd transmitting element 5, be used for being applied to when disconnection the voltage at described D.C. contactor coil two ends, and described judging unit 3 is judged when the voltage at the described auxiliary contact two ends that obtain is described setting voltage U2, send the first safety signal, adhesion fault do not occur in order to the main contacts that characterizes described D.C. contactor.
When adhesion fault did not appear in main contacts, main contacts was in off-state, and auxiliary contact link with main contacts, and namely auxiliary contact also are in off-state, was in off-state by detecting auxiliary contact, can judge that main contacts also is in off-state.
The second control module 6 is used for when consumer needs work, and the voltage that is applied to described D.C. contactor coil two ends is connected in control, so that the main contacts of described D.C. contactor and auxiliary contact engage simultaneously.
Described detecting unit 2 is also for detection of the voltage at described auxiliary contact two ends.
Described judging unit 3 also is used for judging whether the voltage at described auxiliary contact two ends is setting voltage.
The second transmitting element 7 when being described setting voltage for the voltage at the described auxiliary contact two ends that described judgment unit judges obtains, sends the second alerting signal, mechanical stuck fault occurs in order to the main contacts that characterizes described D.C. contactor.
When connecting consumer, after control is connected and is applied to the voltage U a at D.C. contactor coil two ends, the main contacts of D.C. contactor under normal circumstances and auxiliary contact should engage simultaneously, and when mechanical stuck fault appears in main contacts, be that main contacts will be in off-state, auxiliary contact also are in off-state, at this moment, be not 0 when being always setting voltage U2 by the voltage U b that detects the auxiliary contact two ends, can judge that mechanical stuck fault appears in main contacts.
The 4th transmitting element 8, be used for being applied to when connection the voltage at described D.C. contactor coil two ends, and described judging unit 3 judges that the voltage at the described auxiliary contact two ends that obtain is not described setting voltage, send the second safety signal, mechanical stuck fault do not occur in order to the main contacts that characterizes described D.C. contactor.
When mechanical stuck fault did not appear in main contacts, main contacts was in engagement state, and auxiliary contact link with main contacts, and namely auxiliary contact also are in engagement state, was in engagement state by detecting auxiliary contact, can judge that main contacts also is in engagement state.
The pick-up unit of the utility model high-voltage DC contactor main contacts fault, when needs are powered for described consumer, connect the voltage that is applied to described D.C. contactor coil two ends by control, detect again the voltage at described auxiliary contact two ends, when the voltage at auxiliary contact two ends is setting voltage, show that the auxiliary contact that should be in engagement state have become off-state, and then can know that main contacts also is in off-state, detect by the voltage to the auxiliary contact two ends, can judge fast that mechanical stuck fault appears in the main contacts of D.C. contactor.
Also need to prove, in this article, relational terms such as the first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint and have the relation of any this reality or sequentially between these entities or the operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby not only comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.Do not having in the situation of more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. the pick-up unit of a high-voltage DC contactor main contacts fault is characterized in that, the main contacts two ends of described D.C. contactor respectively with consumer be connected direct supply and be connected, described consumer is connected with described the first direct supply; The auxiliary contact two ends of described D.C. contactor respectively with dropping resistor be connected direct supply and be connected, described dropping resistor is connected with described the second direct supply, described auxiliary contact are along with described main contacts links, described device comprises:
The first control module is used for when described the first direct supply of needs stops as described consumer power supply, and control disconnects the voltage that is applied to described D.C. contactor coil two ends;
Detecting unit is for detection of the voltage at described auxiliary contact two ends;
Judging unit is used for judging whether the voltage at described auxiliary contact two ends is setting voltage, and described setting voltage is the merchant of described the second direct supply voltage and described dropping resistor;
The first transmitting element when being not setting voltage for the voltage at the described auxiliary contact two ends that described judgment unit judges obtains, sends the first alerting signal, adhesion fault occurs in order to the main contacts that characterizes described D.C. contactor.
2. device according to claim 1 is characterized in that, described device also comprises:
The second control module is used for when described consumer needs work, and the voltage that is applied to described D.C. contactor coil two ends is connected in control;
Described detecting unit is also for detection of the voltage at described auxiliary contact two ends;
Described judging unit also is used for judging whether the voltage at described auxiliary contact two ends is setting voltage;
The second transmitting element when being described setting voltage for the voltage at the described auxiliary contact two ends that described judgment unit judges obtains, sends the second alerting signal, mechanical stuck fault occurs in order to the main contacts that characterizes described D.C. contactor.
3. device according to claim 1 is characterized in that, described device also comprises:
The 3rd transmitting element, be used for being applied to when disconnection the voltage at described D.C. contactor coil two ends, and when the voltage at the described auxiliary contact two ends that described judgment unit judges obtains is described setting voltage, send the first safety signal, adhesion fault do not occur in order to the main contacts that characterizes described D.C. contactor.
4. device according to claim 2 is characterized in that, described device also comprises:
The 4th transmitting element, be used for being applied to when connection the voltage at described D.C. contactor coil two ends, and the voltage at the described auxiliary contact two ends that described judgment unit judges obtains is not described setting voltage, send the second safety signal, mechanical stuck fault do not occur in order to the main contacts that characterizes described D.C. contactor.
5. according to claim 1 to 4 each described devices, it is characterized in that, be provided with mechanical linkage between the main contacts of described D.C. contactor and the auxiliary contact, so that described auxiliary contact engage simultaneously with described main contacts or disconnect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220504425 CN202794463U (en) | 2012-09-27 | 2012-09-27 | Detection device for main contact fault of high-voltage direct current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220504425 CN202794463U (en) | 2012-09-27 | 2012-09-27 | Detection device for main contact fault of high-voltage direct current contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794463U true CN202794463U (en) | 2013-03-13 |
Family
ID=47821705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220504425 Expired - Fee Related CN202794463U (en) | 2012-09-27 | 2012-09-27 | Detection device for main contact fault of high-voltage direct current contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202794463U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890237A (en) * | 2012-09-27 | 2013-01-23 | 潍柴动力股份有限公司 | Method and device for detecting faults of main touch point of high-voltage direct-current contact |
| 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 |
| CN106526464A (en) * | 2015-09-09 | 2017-03-22 | 大陆汽车电子(长春)有限公司 | Fault testing method for serial starter relays |
| CN106707152A (en) * | 2016-12-20 | 2017-05-24 | 东莞钜威动力技术有限公司 | Adhesion detection circuit and adhesion detection method for electric automobile power relay |
| CN107015142A (en) * | 2017-04-01 | 2017-08-04 | 蚌埠市双环电子集团股份有限公司 | A kind of intelligent high-pressure D.C. contactor |
| CN107831430A (en) * | 2017-08-30 | 2018-03-23 | 欣旺达电动汽车电池有限公司 | A kind of high voltage connector electric shock abnormal detection circuit and detection method |
| CN109490768A (en) * | 2018-11-12 | 2019-03-19 | 北京长城华冠汽车科技股份有限公司 | The redundance judging method and system of contacts of contactor adhesion |
| CN111707934A (en) * | 2020-05-14 | 2020-09-25 | 华为技术有限公司 | Switch detector, use method of switch detector and vehicle |
| CN111722104A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Method and device for detecting state of air inlet heating relay |
| CN113330323A (en) * | 2020-10-21 | 2021-08-31 | 深圳欣锐科技股份有限公司 | Contactor state detection circuit, system and vehicle |
| CN113963994A (en) * | 2021-10-15 | 2022-01-21 | 珠海格力电器股份有限公司 | Contactor that adhesion was reported to police |
-
2012
- 2012-09-27 CN CN 201220504425 patent/CN202794463U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890237A (en) * | 2012-09-27 | 2013-01-23 | 潍柴动力股份有限公司 | Method and device for detecting faults of main touch point of high-voltage direct-current contact |
| CN106526464A (en) * | 2015-09-09 | 2017-03-22 | 大陆汽车电子(长春)有限公司 | Fault testing method for serial starter relays |
| CN106526464B (en) * | 2015-09-09 | 2020-02-21 | 大陆汽车电子(长春)有限公司 | Fault detection method for series starter relay |
| CN106199409B (en) * | 2016-06-28 | 2019-05-31 | 苏州汇川技术有限公司 | High voltage electric equipment contactor adhesion detection system and method |
| 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 |
| CN106707152A (en) * | 2016-12-20 | 2017-05-24 | 东莞钜威动力技术有限公司 | Adhesion detection circuit and adhesion detection method for electric automobile power relay |
| CN107015142A (en) * | 2017-04-01 | 2017-08-04 | 蚌埠市双环电子集团股份有限公司 | A kind of intelligent high-pressure D.C. contactor |
| CN107831430A (en) * | 2017-08-30 | 2018-03-23 | 欣旺达电动汽车电池有限公司 | A kind of high voltage connector electric shock abnormal detection circuit and detection method |
| CN109490768A (en) * | 2018-11-12 | 2019-03-19 | 北京长城华冠汽车科技股份有限公司 | The redundance judging method and system of contacts of contactor adhesion |
| CN109490768B (en) * | 2018-11-12 | 2021-01-26 | 北京长城华冠汽车科技股份有限公司 | Redundancy judgment method and system for contactor contact adhesion |
| CN111707934A (en) * | 2020-05-14 | 2020-09-25 | 华为技术有限公司 | Switch detector, use method of switch detector and vehicle |
| WO2021227582A1 (en) * | 2020-05-14 | 2021-11-18 | 华为数字能源技术有限公司 | Switch detector, method of use of switch detector, and vehicle |
| CN111722104A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Method and device for detecting state of air inlet heating relay |
| CN111722104B (en) * | 2020-06-30 | 2023-10-20 | 潍柴动力股份有限公司 | Method and device for detecting state of air inlet heating relay |
| CN113330323A (en) * | 2020-10-21 | 2021-08-31 | 深圳欣锐科技股份有限公司 | Contactor state detection circuit, system and vehicle |
| CN113963994A (en) * | 2021-10-15 | 2022-01-21 | 珠海格力电器股份有限公司 | Contactor that adhesion was reported to police |
| CN113963994B (en) * | 2021-10-15 | 2022-10-21 | 珠海格力电器股份有限公司 | Contactor that adhesion was reported to police |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202794463U (en) | Detection device for main contact fault of high-voltage direct current contactor | |
| CN102890237A (en) | Method and device for detecting faults of main touch point of high-voltage direct-current contact | |
| CN101615040B (en) | Temperature control system with contactor fault detection and control | |
| CN202837494U (en) | Contactor state inspection device | |
| CN103605073B (en) | Based on the self checking method of the relay circuit of single-phase grid-connected inversion system | |
| CN202994951U (en) | Diesel-engine fuel-cut-off solenoid valve coil break line detection apparatus | |
| CN106655898B (en) | Reactor cabinet control circuit | |
| CN105116818A (en) | Monitoring method and system of alternating current contactor | |
| CN109249807B (en) | Electric high-voltage conversion circuit for rail transit vehicle | |
| CN104019278A (en) | On-line detecting device of emergency shutdown system valve and emergency shutdown system | |
| CN204905134U (en) | Intelligent isolation switch | |
| CN106594503A (en) | Safety protection control device of automatic assembly machine based on safety relay | |
| CN204068773U (en) | Adopt the high-tension motor transient state start-up compensation equipment of reactor reduced-voltage starting | |
| CN203513016U (en) | Power supply open-phase protection device of lift control cabinet | |
| CN206459002U (en) | Automatic assembling machine security protection and control device based on safety relay | |
| CN102570932A (en) | Self-coupling decompression start box for motor | |
| US20150274276A1 (en) | Boat with High-Voltage System | |
| CN104505823B (en) | Stop repair method electric power wink and stop in wink to select reclosing circuit | |
| CN201112999Y (en) | Multifunctional mobile residual current flow protector | |
| CN103904773B (en) | The shunting device of controller switching equipment and the control method of distribution network | |
| CN106992095A (en) | Relay circuit and the method for performing relay circuit self-test | |
| CN204333953U (en) | Stop in wink to select reclosing circuit | |
| CN102832798A (en) | Powering buffering control circuit and control method thereof | |
| CN207977785U (en) | A kind of far and near control exclusive circuit of coal mine high and low voltage switch | |
| CN107918430B (en) | Direct-current control protection device for realizing on-line maintenance of switching value loop |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20160927 |