CN105116818A - Monitoring method and system of AC contactor - Google Patents
Monitoring method and system of AC contactor Download PDFInfo
- Publication number
- CN105116818A CN105116818A CN201510420187.5A CN201510420187A CN105116818A CN 105116818 A CN105116818 A CN 105116818A CN 201510420187 A CN201510420187 A CN 201510420187A CN 105116818 A CN105116818 A CN 105116818A
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- contact
- contactor
- voltage
- state information
- current
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
Abstract
The invention provides a monitoring method and system of an AC contactor. The monitoring system comprises a current detection device, a voltage detection device, a contact detection device and a controller; the current detection device is used to detect a current flowing through a contact of the AC contactor; the voltage detection device is used to detect a voltage of the contact when the contact is disconnected; the contact detection device is used to detect connection and disconnection of the contact to obtain the frequency of the connection and the frequency of the disconnection of the contact; and the controller is connected with the current detection device, the voltage detection device and the contact detection device, the controller obtains current state information of the AC contactor according to the voltage of the contact when the contact is disconnected, the current flowing through the contact before the contact is disconnected, the frequency of the connection and the frequency of the disconnection of the contact and historical test data, and the current state information is displayed to a user, so the user can timely know a state of the AC contactor, a fact that the AC contactors works in a fault state for a long term is reduced, and stability of the system is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly, relate to a kind of method for supervising and system of A.C. contactor.
Background technology
A.C. contactor is a kind of control device of robotization, for controlling switching on and off of load-carrying circuit or Large Copacity control circuit.Due to A.C. contactor have can operated from a distance, can frequent operation and the advantage such as control capability is large, therefore, A.C. contactor has been widely used in various automatic control circuit and household electrical appliance.
But, because user cannot learn the state of A.C. contactor when using household electrical appliance or control system, therefore, once the fault of non-Timeliness coverage A.C. contactor, A.C. contactor is caused to operate with failure for a long time, potential safety hazard will be brought to user, also can affect the stability of household electrical appliance or control system operation.
Summary of the invention
In view of this, the invention provides a kind of method for supervising and system of A.C. contactor, so that the running status of A.C. contactor cannot be known in prior art in time, cause A.C. contactor to operate with failure for a long time, affect the problem of household electrical appliance or control system operation stability.
For achieving the above object, the invention provides following technical scheme:
A supervisory system for A.C. contactor, comprising:
Current sensing means, described current sensing means is arranged on the end of incoming cables of A.C. contactor, for detecting the electric current of the contact flowing through described A.C. contactor;
Voltage check device, described voltage check device be arranged on described A.C. contactor arbitrary end of incoming cables and between load end, for detecting voltage when described contact disconnects between described contact;
Contact detection device, described contact detection device is arranged on the path of described contact, for detecting the closed and disconnected of described contact, to obtain the number of times of the described closing of contact and disconnection;
The controller be connected with described current sensing means, voltage check device and contact detection device, voltage when described controller disconnects according to described contact between described contact, described contact flow through the electric current of described contact, the number of times of the closed and disconnected of described contact and historical test data before disconnecting, obtain the current state information of described A.C. contactor, and described current state information is shown to user.
Preferably, described current sensing means is current sensor; Described voltage check device is voltage sensor; Described contact detection device is proximity switch.
Preferably, described A.C. contactor is three-phase ac contactor, and described supervisory system at least comprises three current sensing meanss; Described A.C. contactor is single phase ac contactor, and described supervisory system at least comprises a current sensing means.
Preferably, described historical test data comprises A.C. contactor test data at different operating conditions; The current state information of described A.C. contactor comprises residual life and the contact wear information of described A.C. contactor.
Preferably, described controller, also for judging that whether the residual life of described A.C. contactor is lower than setting value, if so, then controlling alarm module and giving the alarm, changing A.C. contactor in time with reminding user.
Preferably, described maintenance project also for according to described current state information determination maintenance project, and is shown to user by described controller.
Preferably, also comprise the display module be connected with described controller, described display module is for showing current state information and the maintenance project of described A.C. contactor.
A method for supervising for A.C. contactor, comprising:
Detect the electric current flowing through the contact of A.C. contactor;
Detect the voltage between described contact when described contact disconnects;
Detect the closed and disconnected of described contact, to obtain the number of times of the described closing of contact and disconnection;
Voltage when disconnecting according to described contact between described contact, described contact flow through the electric current of described contact, the number of times of the closed and disconnected of described contact and historical test data before disconnecting, obtain the current state information of described A.C. contactor, and described current state information is shown to user.
Preferably, also comprise:
Judge that whether the residual life of described A.C. contactor is lower than setting value;
If so, then control alarm module to give the alarm, change A.C. contactor in time with reminding user.
Preferably, also comprise:
According to described current state information determination maintenance project, and described maintenance project is shown to user.
Compared with prior art, technical scheme provided by the present invention has the following advantages:
The method for supervising of A.C. contactor provided by the present invention and system, the number of times of voltage when disconnecting according to ac contactor contact, the front electric current of disconnection, closed and disconnected and historical test data, obtain the current state information of A.C. contactor, and current state information is shown to user, thus user can be made to recognize the state of A.C. contactor in time, reduce operating with failure for a long time of A.C. contactor, the stability of raising system, further, the workload of user in daily servicing can also be reduced.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The supervisory system of a kind of three-phase ac contactor that Fig. 1 provides for one embodiment of the present of invention;
The supervisory system of a kind of single phase ac contactor that Fig. 2 provides for one embodiment of the present of invention;
The process flow diagram of the method for supervising of the A.C. contactor that Fig. 3 provides for an alternative embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
An embodiment provides a kind of supervisory system of A.C. contactor, be described in the present embodiment for the A.C. contactor in air-conditioning system, the structure of this A.C. contactor is identical with existing structure, does not repeat them here.With reference to the supervisory system that figure 1 and Fig. 2, Fig. 1 are a kind of three-phase ac contactor, Fig. 2 is a kind of supervisory system of single phase ac contactor.
The supervisory system that the present embodiment provides comprises current sensing means 10, voltage check device 20, contact detection device 30 and controller 40, certainly, this supervisory system also comprises display module 50, alternatively, this display module 50 can be the line control machine etc. of air-conditioning system, namely adopts the remote control equipment of air-conditioning system as interactive interface.
Wherein, current sensing means 10 is preferably current sensor, and this current sensing means 10 is arranged on the end of incoming cables of control A.C. contactor KM, for detecting the electric current of the contact flowing through described A.C. contactor KM.With reference to figure 1, when A.C. contactor KM is three-phase ac contactor, described supervisory system at least comprises three current sensing meanss 10, namely each phase L1, L2 and L3 is provided with a current sensing means 10; With reference to figure 2, when A.C. contactor KM is single phase ac contactor, described supervisory system at least comprises a current sensing means 10, and this current sensing means 10 is arranged on an independent phase L, thus can detect by current sensing means 10 electric current flowing through each contact of A.C. contactor KM.
Voltage check device 20 is preferably voltage sensor, this voltage check device 20 be arranged on described A.C. contactor KM one of them as on L3, i.e. arbitrary end of incoming cables and between load end, for detecting the voltage of described contact when described contact disconnects, namely detect the voltage between the stationary contact of the contact of voltage check device 20 correspondence and moving contact.Voltage check device 20, when detecting the voltage that contact disconnects, can obtain the undulating quantity of voltage in several milliseconds, and itself and contact can be disconnected the magnitude of voltage after stablizing and contrast by voltage check device 20, obtain magnitude of voltage during this contact tripping.
Contact detection device 30 is preferably proximity switch, and this proximity switch is arranged on the path of described contact, for detecting the closed and disconnected of described contact.Due to contact disconnection with when closing, moving contact can move by relative stationary contact, and therefore, the proximity switch be arranged between moving contact and stationary contact on path can detect the motion of moving contact.
Controller 40 is connected with current sensing means 10, voltage check device 20, contact detection device 30 and display module 50.When contact detection device 30 detect contact once disconnection and closed time, register for recording number of times in controller 40 adds 1, then the voltage of described contact when controller 40 disconnects according to described contact, described contact flow through the electric current of described contact, the number of times of the closed and disconnected of described contact and historical test data before disconnecting, obtain the current state information of described A.C. contactor, and described current state information is shown to user.Wherein, historical test data comprises A.C. contactor KM test data at different operating conditions; The current state information of A.C. contactor KM comprises residual life and the contact wear information of described A.C. contactor KM.
Particularly, voltage when controller 40 can disconnect according to contact between contact and the galvanometer flowing through contact before disconnecting calculate the energy rank this time disconnected between contact, the test data of contact wear degree corresponding with the historical test data stored in database and different-energy rank for this energy rank is compared, judge the degree of wear this time disconnected A.C. contactor KM contact, and obtain the wear information of this contact;
Further, controller 40 also can disconnect according to contact and the difference of total electric life frequency table of the historical test data that stores in closed number of times and database and A.C. contactor KM, draws residue access times and the residual life information of this contact;
Afterwards, the wear information of this contact and residual life information etc. are sent to display module 50 by controller 40, by display module 50 by these information displaying to user so that user understands the operation information of A.C. contactor KM in time, avoid the stability of its influential system that operates with failure for a long time.
Wherein, fuzzy Judgment can be carried out to the degree of wear of slider material according to energy, energy as calculated by voltage and current is too high, slider material then can be caused to dispel the heat uneven, and then cause slider material to occur damaging, such as, when the material of contact is copper, the fusing point of copper is 2000 DEG C, copper product bears the high voltage of 5ms time under normal circumstances, normal wear can be produced, bear the high voltage of 10ms, heavy wear can be produced, and, more more can accelerate to later stage wearing and tearing, based on this, the degree of contact wear can be judged according to energy, and then judge the residue service time of contact.
In addition, the controller 40 in the present embodiment also can formulate maintenance project according to the current state information of A.C. contactor KM, and by display module 50, maintenance project is shown to user.Such as, controller 40 can provide rational maintenance project according to the abrasion condition of A.C. contactor KM and residual life information, such as service free, need how long to carry out to maintain or replacing etc.
General user has fixing maintenance period, and after controller 40 obtains residue service time of A.C. contactor KM, reminding user carries out maintaining or changing A.C. contactor within a certain period of time, avoids A.C. contactor KM to damage power-off.Further, when replacing construction or residue degree are less than setting value, controller 40 can control sound and light alarm module and give the alarm, and maintains in time or change A.C. contactor with reminding user.
The supervisory system of the A.C. contactor that the present embodiment provides, electric current before voltage when disconnecting according to ac contactor contact, disconnection, the number of times of closed and disconnected and historical test data, obtain the current state information of A.C. contactor, and current state information is shown to user, thus user can be made to recognize the state of A.C. contactor in time, reduce the tape jam long-time running of A.C. contactor, improve the stability of system, and, user does not need oneself to formulate maintenance project etc., thus can reduce the workload of user in daily servicing.
An alternative embodiment of the invention provides a kind of method for supervising of A.C. contactor, with reference to figure 3, comprising:
S301: detect the electric current flowing through the contact of A.C. contactor;
The supervisory system that the method for supervising of the A.C. contactor in the present embodiment adopts is identical with the supervisory system that above-described embodiment provides, this supervisory system comprises the current sensing means of the end of incoming cables being arranged on A.C. contactor, i.e. arbitrary end of incoming cables and to the voltage check device between load end in one of them phase being arranged on A.C. contactor, be arranged on contact detection device on the path of contact and and current sensing means, voltage check device, the controller that contact detection device is connected, thus the electric current of each contact flowing through A.C. contactor can be detected by current sensing means.
S302: detect the voltage between described contact when described contact disconnects;
The voltage between corresponding stationary contact and moving contact can be detected by detection voltage check device.Voltage check device, when detecting the voltage that contact disconnects, can obtain the undulating quantity of voltage in several milliseconds, and itself and contact can be disconnected the magnitude of voltage after stablizing and contrast by voltage check device, obtain magnitude of voltage during this contact tripping.
S303: the closed and disconnected detecting described contact, to obtain the number of times of the described closing of contact and disconnection;
Contact detection device is preferably proximity switch, and this proximity switch is arranged on the path of described contact, for detecting the closed and disconnected of described contact.When contact detection device detect contact once disconnection and closed time, the register for recording number of times in controller adds 1, thus can obtain the number of times of the described closing of contact and disconnection.
S304: voltage when disconnecting according to described contact between described contact, described contact flow through the electric current of described contact, the number of times of the closed and disconnected of described contact and historical test data before disconnecting, obtain the current state information of described A.C. contactor, and described current state information is shown to user.
Particularly, voltage when controller can disconnect according to contact between contact and the galvanometer flowing through contact before disconnecting calculate the energy rank this time disconnected between contact, the test data of contact wear degree corresponding with the historical test data stored in database and different-energy rank for this energy rank is compared, judge the degree of wear this time disconnected ac contactor contact, and obtain the wear information of this contact;
Further, controller also can disconnect according to contact and the difference of total electric life frequency table of the historical test data that stores in closed number of times and database and A.C. contactor, draws residue access times and the residual life information of this contact;
Afterwards, the wear information of this contact and residual life information etc. are sent to display module by controller, by display module by these information displaying to user so that user understands the operation information of A.C. contactor in time, avoid the stability of its influential system that operates with failure for a long time.
In addition, the method for supervising of the A.C. contactor in the present embodiment also comprises:
Judge that whether the residual life of described A.C. contactor is lower than setting value;
If so, then control alarm module to give the alarm, change A.C. contactor in time with reminding user.
The method for supervising of the A.C. contactor in the present embodiment also comprises:
According to described current state information determination maintenance project, and described maintenance project is shown to user.
The method for supervising of the A.C. contactor that the present embodiment provides, electric current before voltage when disconnecting according to ac contactor contact, disconnection, the number of times of closed and disconnected and historical test data, obtain the current state information of A.C. contactor, and current state information is shown to user, thus user can be made to recognize the state of A.C. contactor in time, reduce the tape jam long-time running of A.C. contactor, improve the stability of system, further, the workload of user in daily servicing can also be reduced.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a supervisory system for A.C. contactor, is characterized in that, comprising:
Current sensing means, described current sensing means is arranged on the end of incoming cables of A.C. contactor, for detecting the electric current of the contact flowing through described A.C. contactor;
Voltage check device, described voltage check device be arranged on described A.C. contactor arbitrary end of incoming cables and between load end, for detecting voltage when described contact disconnects between described contact;
Contact detection device, described contact detection device is arranged on the path of described contact, for detecting the closed and disconnected of described contact, to obtain the number of times of the described closing of contact and disconnection;
The controller be connected with described current sensing means, voltage check device and contact detection device, voltage when described controller disconnects according to described contact between described contact, described contact flow through the electric current of described contact, the number of times of the closed and disconnected of described contact and historical test data before disconnecting, obtain the current state information of described A.C. contactor, and described current state information is shown to user.
2. system according to claim 1, is characterized in that, described current sensing means is current sensor; Described voltage check device is voltage sensor; Described contact detection device is proximity switch.
3. system according to claim 1, is characterized in that, described A.C. contactor is three-phase ac contactor, and described supervisory system at least comprises three current sensing meanss; Described A.C. contactor is single phase ac contactor, and described supervisory system at least comprises a current sensing means.
4. system according to claim 1, is characterized in that, described historical test data comprises A.C. contactor test data at different operating conditions; The current state information of described A.C. contactor comprises residual life and the contact wear information of described A.C. contactor.
5. system according to claim 4, is characterized in that, described controller, also for judging that whether the residual life of described A.C. contactor is lower than setting value, if so, then controlling alarm module and giving the alarm, changing A.C. contactor in time with reminding user.
6. system according to claim 1, is characterized in that, described maintenance project also for according to described current state information determination maintenance project, and is shown to user by described controller.
7. the system according to any one of claim 1 ~ 6, is characterized in that, also comprises the display module be connected with described controller, and described display module is for showing current state information and the maintenance project of described A.C. contactor.
8. a method for supervising for A.C. contactor, is characterized in that, comprising:
Detect the electric current flowing through the contact of A.C. contactor;
Detect the voltage between described contact when described contact disconnects;
Detect the closed and disconnected of described contact, to obtain the number of times of the described closing of contact and disconnection;
Voltage when disconnecting according to described contact between described contact, described contact flow through the electric current of described contact, the number of times of the closed and disconnected of described contact and historical test data before disconnecting, obtain the current state information of described A.C. contactor, and described current state information is shown to user.
9. method according to claim 8, is characterized in that, also comprises:
Judge that whether the residual life of described A.C. contactor is lower than setting value;
If so, then control alarm module to give the alarm, change A.C. contactor in time with reminding user.
10. method according to claim 8, is characterized in that, also comprises:
According to described current state information determination maintenance project, and described maintenance project is shown to user.
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| CN201510420187.5A CN105116818B (en) | 2015-07-16 | 2015-07-16 | The monitoring method and system of A.C. contactor |
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| CN201510420187.5A CN105116818B (en) | 2015-07-16 | 2015-07-16 | The monitoring method and system of A.C. contactor |
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| CN106546860A (en) * | 2016-12-09 | 2017-03-29 | 中国恩菲工程技术有限公司 | Cancel the monitoring system and monitoring method of catalyst monitoring in control system |
| CN106774103A (en) * | 2016-11-20 | 2017-05-31 | 广西大学 | A kind of A.C. contactor electronic information acquisition system |
| CN106959416A (en) * | 2017-04-25 | 2017-07-18 | 深圳供电局有限公司 | A kind of lv contactor contacts status on-Line Monitor Device and method |
| CN107728049A (en) * | 2017-09-20 | 2018-02-23 | 昆山国力源通新能源科技有限公司 | The detection method of D.C. contactor service life |
| CN110678763A (en) * | 2017-09-29 | 2020-01-10 | 株式会社Lg化学 | Contactor failure rate prediction system and method |
| CN111799762A (en) * | 2020-05-27 | 2020-10-20 | 河北新天科创新能源技术有限公司 | Wind turbine generator set and method for preventing engine room of fan from being on fire |
| CN114047437A (en) * | 2021-11-09 | 2022-02-15 | 中车青岛四方机车车辆股份有限公司 | Contactor state detection method, system and device and railway vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106774103A (en) * | 2016-11-20 | 2017-05-31 | 广西大学 | A kind of A.C. contactor electronic information acquisition system |
| CN106546860A (en) * | 2016-12-09 | 2017-03-29 | 中国恩菲工程技术有限公司 | Cancel the monitoring system and monitoring method of catalyst monitoring in control system |
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| CN110678763A (en) * | 2017-09-29 | 2020-01-10 | 株式会社Lg化学 | Contactor failure rate prediction system and method |
| CN110678763B (en) * | 2017-09-29 | 2022-03-18 | 株式会社Lg化学 | Contactor failure rate prediction system and method |
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| CN111799762A (en) * | 2020-05-27 | 2020-10-20 | 河北新天科创新能源技术有限公司 | Wind turbine generator set and method for preventing engine room of fan from being on fire |
| CN114047437A (en) * | 2021-11-09 | 2022-02-15 | 中车青岛四方机车车辆股份有限公司 | Contactor state detection method, system and device and railway vehicle |
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| CN105116818B (en) | 2018-01-16 |
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