CN108872839B - Method, device and system for detecting pull-in fault of contactor - Google Patents
Method, device and system for detecting pull-in fault of contactor Download PDFInfo
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- CN108872839B CN108872839B CN201810369101.4A CN201810369101A CN108872839B CN 108872839 B CN108872839 B CN 108872839B CN 201810369101 A CN201810369101 A CN 201810369101A CN 108872839 B CN108872839 B CN 108872839B
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Abstract
The invention discloses a method, a device and a system for detecting a pull-in fault of a contactor. The detection method comprises the following steps: detecting the current value of a main loop formed by the attraction of the main contactor and the star-delta contactor; comparing the current value with a preset current value; and determining whether the suction of the main contactor and the star-delta contactor fails according to the comparison result. According to the invention, the accuracy of detecting the pull-in fault of the contactor can be improved, so that the reliability of the screw machine is improved, and the competitiveness of a product is improved.
Description
Technical Field
The invention relates to the technical field of units, in particular to a method, a device and a system for detecting a pull-in fault of a contactor.
Background
At present, pull-in fault detection of a screw machine generally adopts a method of detecting whether pull-in of an auxiliary contact of a corresponding contactor of the compressor fails or not in the process of starting the compressor. When the auxiliary contact is oxidized or in poor contact, the screw machine main board usually determines the contactor as an open state by mistake, and starts an alarm protection function, so that the screw machine cannot be normally started. However, the contactor is large in contact resistance, the main contact and the coil of the contactor are not damaged, and the contactor is not opened. At this time, the contactor can still work normally. Therefore, the accuracy of the pull-in fault detection method is low.
Aiming at the problem that the accuracy of a pull-in fault detection method of a contactor in the prior art is low, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a system for detecting a pull-in fault of a contactor, and aims to solve the problem that the accuracy of a method for detecting the pull-in fault of the contactor in the prior art is low.
In order to solve the technical problem, the invention provides a method for detecting a pull-in fault of a contactor, which comprises the following steps:
detecting the current value of a main loop formed by the attraction of the main contactor and the star-delta contactor;
comparing the current value with a preset current value;
and determining whether the suction of the main contactor and the star-delta contactor fails or not according to the comparison result.
Further, confirm according to the comparison result whether main contactor and star triangle contactor's actuation breaks down, include: if the current value is larger than the preset current value, further detecting auxiliary contacts of the main contactor and the star-delta contactor, and determining whether the attraction fails according to the detection result; and if the current value is less than or equal to the preset current value, determining that the pull-in is in fault.
Further, further detect main contactor with the auxiliary contact of star triangle contactor, whether the actuation breaks down according to the testing result determination, include: if a first signal fed back by the main contactor is continuously received within a preset time length, determining and prompting the fault of an auxiliary contact of the main contactor; wherein the first signal is used to indicate that the main contactor is in an open state; or if a second signal fed back by the star-delta contactor is continuously received within the preset time, determining and prompting the fault of an auxiliary contact of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an open state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
Further, the prompting the fault of the auxiliary contact of the main contactor comprises: the method includes the steps of turning on a main contactor fault indicator lamp and/or displaying a main contactor auxiliary contact fault on a display panel.
Further, the prompting of the fault of the auxiliary contact of the star-delta contactor comprises: and starting a fault indicator lamp of the star-delta contactor and/or displaying the fault of the auxiliary contact of the star-delta contactor on a display panel.
Further, further detect main contactor with the auxiliary contact of star triangle contactor, whether the actuation breaks down according to the testing result determination, still include: if a first signal fed back by the main contactor is continuously received within a preset time length and the frequency of receiving the first signal reaches a preset frequency, determining and prompting the fault of an auxiliary contact of the main contactor; wherein the first signal is used to indicate that the main contactor is in an open state; or if a second signal fed back by the star-delta contactor is continuously received within the preset time length and the frequency of receiving the second signal reaches the preset frequency, determining and prompting the fault of an auxiliary contact of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an open state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
The invention also provides a detection device for the pull-in fault of the contactor, which comprises:
the detection module is used for detecting the current value of a main loop formed by the attraction of the main contactor and the star-delta contactor;
the comparison module is used for comparing the current value with a preset current value;
and the determining module is used for determining whether the suction of the main contactor and the star-delta contactor fails according to the comparison result.
Further, the determining module is further configured to further detect the auxiliary contacts of the main contactor and the star-delta contactor if the current value is greater than a preset current value, and determine whether the pull-in operation fails according to a detection result; and if the current value is less than or equal to the preset current value, determining that the pull-in is in fault.
Further, the determining module is further configured to determine and prompt an auxiliary contact fault of the main contactor if the first signal fed back by the main contactor is continuously received within a preset time period; wherein the first signal is used to indicate that the main contactor is in an open state; or if a second signal fed back by the star-delta contactor is continuously received within the preset time, determining and prompting the fault of an auxiliary contact of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an open state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
Further, the determining module is also used for starting a main contactor fault indicator lamp and/or displaying a main contactor auxiliary contact fault on a display panel.
Further, the determining module is further used for starting a star-delta contactor fault indicator lamp and/or displaying a star-delta contactor auxiliary contact fault on a display panel.
Further, the determining module is further configured to determine and prompt an auxiliary contact fault of the main contactor if the first signal fed back by the main contactor is continuously received within a preset time period and the number of times of receiving the first signal reaches a preset number of times; wherein the first signal is used to indicate that the main contactor is in an open state; or if a second signal fed back by the star-delta contactor is continuously received within the preset time length and the frequency of receiving the second signal reaches the preset frequency, determining and prompting the fault of an auxiliary contact of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an open state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
The invention also provides a detection system for the pull-in fault of the contactor, which comprises the detection device for the pull-in fault of the contactor.
By applying the technical scheme of the invention, the current value of a main loop formed by the attraction of the main contactor and the star-delta contactor is detected; comparing the current value with a preset current value; and determining whether the suction of the main contactor and the star-delta contactor fails or not according to the comparison result. The main loop current value is introduced as a factor for judging whether the contactor has pull-in faults, so that the accuracy of the pull-in fault detection method is improved. The situation that the screw machine cannot be started due to error protection is avoided, so that the reliability of the screw machine is improved, and the product competitiveness is enhanced.
Drawings
FIG. 1 is a flow chart of a contactor pull-in fault detection method according to an embodiment of the invention;
FIG. 2 is a flow chart of a contactor pull-in fault detection method according to an embodiment of the invention;
FIG. 3 is a flow chart of a contactor pull-in fault detection method according to an embodiment of the invention;
fig. 4 is a block diagram of a contactor pull-in fault detection apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments, it being understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
To facilitate an understanding of the following embodiments of the present invention, techniques related to embodiments of the present invention will now be briefly described. In a screw machine, one compressor generally requires three types of contactors for control, namely a main contactor, a star-delta contactor, and an auxiliary contactor. In the starting process of the compressor, the main contactor and the star-delta contactor are attracted, after a period of time, the main contactor and the star-delta contactor are disconnected, the main contactor and the auxiliary contactor are attracted, and after no fault exists in the two attracting processes, the compressor can normally operate. The detection method provided by the embodiment of the invention is applied to the suction process of the main contactor and the star-delta contactor.
In order to solve the problem of low accuracy of a method for detecting a pull-in fault of a contactor in the prior art, an embodiment of the invention provides a method for detecting a pull-in fault of a contactor, and as shown in fig. 1, the method comprises the following steps:
and S101, detecting a current value of a main loop formed by the attraction of the main contactor and the star-delta contactor.
And S102, comparing the current value with a preset current value.
And S103, determining whether the attraction between the main contactor and the star-delta contactor has a fault according to the comparison result.
In the embodiment of the invention, the main loop current value and the contactor whether to be attracted have larger correlation degree, and the main loop current value is introduced as a factor for judging whether the contactor has attraction faults or not, so that the accuracy of the attraction fault detection method is improved, the condition that the screw machine cannot be started due to error protection is avoided, the reliability of the screw machine is improved, and the product competitiveness is enhanced.
Before the current value of a main circuit formed by the main contactor and the star-delta contactor after being sucked is detected, the mainboard can send a sucking command to the main contactor and the star-delta contactor, and the sucking command is used for indicating the main contactor and the star-delta contactor to be sucked.
It is understood that the main circuit current value is a current value flowing through the main contacts of the main contactor and the star-delta contactor, and can also be understood as a current value flowing through the compressor. Step S103, determining whether the pull-in of the main contactor and the star-delta contactor fails according to the comparison result may include: if the current value is larger than the preset current value, further detecting the auxiliary contacts of the main contactor and the star-delta contactor, and determining whether the attraction is in fault according to the detection result; and if the current value is less than or equal to the preset current value, determining that the pull-in is failed.
When the current value is smaller than or equal to the preset current value, the main circuit formed by the main contactor and the star-delta contactor is determined to be in a disconnected state, the contactor is pulled in to break down, at the moment, the machine can be stopped, and manual detection is carried out to remove the fault. The preset current value may be determined by a user according to actual needs or performance of the compressor.
When the current value is larger than the preset current value, the main circuit formed by the main contactor and the star-delta contactor can be determined to be in a normal working state, the states of the auxiliary contacts of the main contactor and the star-delta contactor can still not be determined, and whether the suction of the contactor breaks down or not can not be accurately determined. At the moment, whether the pull-in is in fault can be further determined by detecting the auxiliary contacts of the main contactor and the star-delta contactor, and the accuracy of the detection method for the pull-in fault of the contactor is further improved.
In one possible implementation manner, as shown in fig. 2, after comparing the current value with the preset current value in step S102, the method further includes:
step S2011, if the current value is greater than the preset current value, if the first signal fed back by the main contactor is continuously received within the preset time, determining and prompting an auxiliary contact fault of the main contactor.
Wherein the first signal is used to indicate that the main contactor is in an open state. Alternatively, the first and second electrodes may be,
and S2012, if the current value is greater than the preset current value, if a second signal fed back by the star-delta contactor is continuously received within a preset time, determining and prompting the fault of the auxiliary contact of the star-delta contactor.
The second signal is used for indicating that the star-delta contactor is in an off state.
And S2013, if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the attraction is in fault.
It can be appreciated that when it is detected that the auxiliary contacts are not engaged, it is determined that an engagement fault has occurred in the contactor, which may result in false alarm protection. Because there are many accidental factors, such as human detection errors and detection errors, in the detection process. When the auxiliary contact is not attracted at the moment, the auxiliary contact is likely to be continuously attracted at the next moment, if the auxiliary contact is not attracted at a certain moment, the auxiliary contact is used as the basis for the attraction fault of the contactor, so that protection alarm is started, the method is inaccurate, the fault rate is improved, and the working efficiency is reduced. Therefore, when the first signal or the second signal is continuously received within the preset time length, the suction is determined to be in fault, the detection accuracy can be further improved, and the fault rate is reduced.
The continuous reception of the first signal or the second signal within the preset time length may be continuous reception of the first signal or the second signal within the preset time length, or the number of times of receiving the first signal is greater than the preset number of times or the number of times of receiving the second signal is greater than the preset number of times within the preset time length. In both cases, it can be determined that the first signal or the second signal is continuously received within a preset time period.
Step S2011 and step S2012 may be executed alternatively or in parallel, which is not limited in this embodiment of the present invention. When only the auxiliary contact of the main contactor fails, the step S2011 is executed separately, when only the auxiliary contact of the star-delta contactor fails, the step S2012 is executed separately, and when the auxiliary contact of the main contactor and the auxiliary contact of the star-delta contactor fail simultaneously, the step S2011 and the step S2012 are executed in parallel.
Wherein, the suggestion main contactor's auxiliary contact trouble includes: the method includes the steps of turning on a main contactor fault indicator lamp and/or displaying a main contactor auxiliary contact fault on a display panel. The auxiliary contact fault of the star-delta contactor is prompted to comprise: and starting a fault indicator lamp of the star-delta contactor and/or displaying the fault of the auxiliary contact of the star-delta contactor on a display panel. Wherein, the color, the flickering frequency and the like of the fault indicating lamp can be set by a user.
Therefore, a user can timely receive the information that the main contactor or the star-delta contactor has faults and manually detect the faults to remove the faults.
The machine can be stopped when the fault of the auxiliary contact of the main contactor or the star-delta contactor is prompted. And after the fault is eliminated, the screw machine is restarted, and after the pull-in fault of the contactor is detected, the screw machine enters the normal working state again.
In a possible implementation manner, the auxiliary contacts of the main contactor and the star-delta contactor are further detected, and whether the pull-in is failed or not is determined according to the detection result, and the method further comprises the following steps: if a first signal fed back by the main contactor is continuously received within a preset time length and the frequency of receiving the first signal reaches a preset frequency, determining and prompting the fault of an auxiliary contact of the main contactor; the first signal is used for indicating that the main contactor is in an open state; or if a second signal fed back by the star-delta contactor is continuously received within a preset time length and the frequency of receiving the second signal reaches a preset frequency, determining and prompting the fault of an auxiliary contact of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an off state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
It is understood that the preset number of times may be 3, in a specific application example, when the first signal fed back by the main contactor is continuously received for a preset time period, the counter records once, when the first signal fed back by the main contactor is continuously received for 3 times for the preset time period, the counter records three times, and the main board determines that the auxiliary contact of the main contactor is faulty.
It should be noted that, if the number of times of recording of the counter is less than a preset number of times (e.g. 3 times), for example: after the counter records once, in the second detection, the first signal fed back by the main contactor is not continuously received within the preset time, and the recording times of the counter are cleared and recorded again.
The embodiment further improves the detection accuracy, further reduces the failure rate, and can avoid the problem that the screw machine cannot be started due to error protection as much as possible.
Fig. 3 illustrates a method for detecting a pull-in fault of a contactor according to an embodiment of the present invention, the method comprising:
and S301, outputting a contactor pull-in command by the mainboard.
Step S302, the detected compressor current in the preset time period is less than or equal to the preset current value.
And step S303, continuously receiving the feedback signal of the corresponding contactor within a preset time length to be in an off state.
And step S304, determining that the main contactor or the angular contactor has faults, and manually clearing the faults after the machine is stopped.
In the above embodiment, the main loop current value and the contactor attraction correlation degree are relatively large, the main loop current value is introduced as a factor for judging whether the contactor has attraction faults, and when the feedback signal is continuously received within a preset time, the attraction faults are determined, so that the accuracy of the contactor attraction fault detection method is further improved, the fault rate of the screw machine is reduced, the condition that the screw machine cannot be started due to error protection is avoided, the reliability of the screw machine is improved, and the product competitiveness is enhanced.
Fig. 4 shows a detection apparatus for a contactor pull-in failure according to an embodiment of the present invention, the detection apparatus including:
and the detection module 401 is configured to detect a current value of a main loop formed by the attraction of the main contactor and the star-delta contactor.
A comparing module 402, configured to compare the current value with a preset current value.
And a determining module 403, configured to determine whether a failure occurs in the attraction between the main contactor and the star-delta contactor according to the comparison result.
In a possible implementation manner, the determining module 403 is further configured to, if the current value is greater than a preset current value, further detect the auxiliary contacts of the main contactor and the star-delta contactor, and determine whether the pull-in operation fails according to a detection result; and if the current value is less than or equal to the preset current value, determining that the pull-in is failed.
When the current value is larger than the preset current value, the main circuit formed by the main contactor and the star-delta contactor can be determined to be in a normal working state, the states of the auxiliary contacts of the main contactor and the star-delta contactor can still not be determined, and whether the suction of the contactor breaks down or not can not be accurately determined. At the moment, whether the pull-in is in fault can be further determined by detecting the auxiliary contacts of the main contactor and the star-delta contactor, and the accuracy of the detection method for the pull-in fault of the contactor is further improved.
In a possible implementation manner, the determining module 403 is further configured to determine and prompt an auxiliary contact fault of the main contactor if the first signal fed back by the main contactor is continuously received within a preset time period; the first signal is used for indicating that the main contactor is in an open state; or if a second signal fed back by the star-delta contactor is continuously received within a preset time length, determining and prompting an auxiliary contact fault of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an off state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
When the first signal or the second signal is continuously received within the preset time, the suction is determined to be failed, the detection accuracy can be further improved, and the failure rate is reduced.
In one possible implementation, the determination module 403 is further configured to turn on a main contactor failure indicator lamp and/or display a main contactor auxiliary contact failure on a display panel.
In a possible implementation manner, the determining module 403 is further configured to turn on a star-delta contactor fault indicator lamp and/or display a star-delta contactor auxiliary contact fault on a display panel.
Therefore, a user can timely receive the information that the main contactor or the star-delta contactor has faults and manually detect the faults to remove the faults.
In a possible implementation manner, the determining module 403 is further configured to determine and prompt an auxiliary contact fault of the main contactor if the first signal fed back by the main contactor is continuously received within a preset time period and the number of times of receiving the first signal reaches a preset number of times; the first signal is used for indicating that the main contactor is in an open state; or if a second signal fed back by the star-delta contactor is continuously received within a preset time length and the frequency of receiving the second signal reaches a preset frequency, determining and prompting the fault of an auxiliary contact of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an off state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
The implementation mode further improves the detection accuracy, further reduces the failure rate, and can avoid the problem that the screw machine cannot be started due to error protection as much as possible.
In the above embodiment, the detection module detects the current value of the main loop formed by the attraction of the main contactor and the star-delta contactor; the comparison module compares the current value with a preset current value; and the determining module determines whether the suction of the main contactor and the star-delta contactor fails according to the comparison result. The main loop current value and the contactor whether to be attracted are relatively large in correlation degree, the main loop current value is introduced to serve as a factor for judging whether attraction faults occur to the contactor, the accuracy of the attraction fault detection method is improved, the condition that the screw machine cannot be started due to error protection is avoided, the reliability of the screw machine is improved, and the product competitiveness is enhanced.
The embodiment of the invention also provides a detection system for the pull-in fault of the contactor, which comprises the detection device for the pull-in fault of the contactor in the embodiment.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a mobile terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments illustrated in the drawings, the present invention is not limited to the embodiments, which are illustrative rather than restrictive, and it will be apparent to those skilled in the art that many more modifications and variations can be made without departing from the spirit of the invention and the scope of the appended claims.
Claims (9)
1. A detection method for a pull-in fault of a contactor is characterized by comprising the following steps:
detecting the current value of a main loop formed by the attraction of the main contactor and the star-delta contactor;
comparing the current value with a preset current value;
determining whether the suction of the main contactor and the star-delta contactor fails or not according to the comparison result;
confirm according to the comparison result whether main contactor and star triangle contactor's actuation breaks down, include:
if the current value is larger than the preset current value, further detecting auxiliary contacts of the main contactor and the star-delta contactor, and determining whether the attraction fails according to the detection result;
if the current value is smaller than or equal to a preset current value, determining that the pull-in is in fault;
further detect main contactor with the supplementary contact of star triangle contactor, whether the actuation breaks down according to the testing result determination, include:
if a first signal fed back by the main contactor is continuously received within a preset time length, determining and prompting the fault of an auxiliary contact of the main contactor; wherein the first signal is used to indicate that the main contactor is in an open state;
if a second signal fed back by the star-delta contactor is continuously received within the preset time, determining and prompting an auxiliary contact fault of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an open state;
and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
2. The method for detecting the pull-in fault of the contactor according to claim 1, wherein the step of prompting the fault of the auxiliary contact of the main contactor comprises the following steps:
the method includes the steps of turning on a main contactor fault indicator lamp and/or displaying a main contactor auxiliary contact fault on a display panel.
3. The method for detecting the pull-in fault of the contactor according to claim 1, wherein the step of prompting the fault of the auxiliary contact of the star-delta contactor comprises the following steps:
and starting a fault indicator lamp of the star-delta contactor and/or displaying the fault of the auxiliary contact of the star-delta contactor on a display panel.
4. The method for detecting the pull-in fault of the contactor according to claim 1, further detecting auxiliary contacts of the main contactor and the star-delta contactor, and determining whether the pull-in fault occurs according to a detection result, further comprising:
if a first signal fed back by the main contactor is continuously received within a preset time length, and the frequency of receiving the first signal within the preset time length reaches a preset frequency, determining and prompting an auxiliary contact fault of the main contactor; wherein the first signal is used to indicate that the main contactor is in an open state;
if a second signal fed back by the star-delta contactor is continuously received within the preset time length and the frequency of receiving the second signal within the preset time length reaches the preset frequency, determining and prompting the fault of an auxiliary contact of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an open state;
and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
5. The utility model provides a detection device of contactor actuation trouble which characterized in that, detection device includes:
the detection module is used for detecting the current value of a main loop formed by the attraction of the main contactor and the star-delta contactor;
the comparison module is used for comparing the current value with a preset current value;
the determining module is used for determining whether the suction of the main contactor and the star-delta contactor fails or not according to the comparison result;
the determining module is further used for further detecting the auxiliary contacts of the main contactor and the star-delta contactor if the current value is larger than a preset current value, and determining whether attraction fails according to a detection result; if the current value is smaller than or equal to a preset current value, determining that the pull-in is in fault;
the determining module is further configured to determine and prompt an auxiliary contact fault of the main contactor if the first signal fed back by the main contactor is continuously received within a preset time period; wherein the first signal is used to indicate that the main contactor is in an open state; if a second signal fed back by the star-delta contactor is continuously received within the preset time, determining and prompting an auxiliary contact fault of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an open state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
6. The device for detecting the pull-in failure of the contactor according to claim 5,
the determining module is further used for starting a main contactor fault indicating lamp and/or displaying a main contactor auxiliary contact fault on a display panel.
7. The device for detecting the pull-in failure of the contactor according to claim 5,
the determining module is further used for starting a star-delta contactor fault indicating lamp and/or displaying the auxiliary contact fault of the star-delta contactor on a display panel.
8. The device for detecting the pull-in failure of the contactor according to claim 5,
the determining module is further configured to determine and prompt an auxiliary contact fault of the main contactor if a first signal fed back by the main contactor is continuously received within a preset time period and the number of times of receiving the first signal within the preset time period reaches a preset number of times; wherein the first signal is used to indicate that the main contactor is in an open state; if a second signal fed back by the star-delta contactor is continuously received within the preset time length and the frequency of receiving the second signal within the preset time length reaches the preset frequency, determining and prompting the fault of an auxiliary contact of the star-delta contactor; the second signal is used for indicating that the star-delta contactor is in an open state; and if the main contactor is in an off state or the star-delta contactor is in an off state, determining that the pull-in is in fault.
9. A contactor pull-in fault detection system, characterized in that the detection system comprises the contactor pull-in fault detection device of any one of claims 5 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369101.4A CN108872839B (en) | 2018-04-23 | 2018-04-23 | Method, device and system for detecting pull-in fault of contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369101.4A CN108872839B (en) | 2018-04-23 | 2018-04-23 | Method, device and system for detecting pull-in fault of contactor |
Publications (2)
| Publication Number | Publication Date |
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| CN108872839A CN108872839A (en) | 2018-11-23 |
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| CN111453637B (en) * | 2020-03-31 | 2021-12-21 | 苏州汇川技术有限公司 | Elevator brake control method, system, equipment and computer readable storage medium |
| CN116754938B (en) * | 2023-08-21 | 2023-12-15 | 新誉集团有限公司 | Fault detection method and system for contactor of air conditioning equipment in air conditioning unit |
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