CN104635101A - Method, device and system for detecting open-circuit faults of transformers - Google Patents
Method, device and system for detecting open-circuit faults of transformers Download PDFInfo
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Abstract
The invention discloses a method, a device and a system for detecting open-circuit faults of transformers. The method for detecting the open-circuit faults of the transformers includes detecting output voltage values and/or output current values of the transformers; judging whether the output voltage values and/or the output current values of the transformers are abnormal or not; determining that the transformers are disqualified if the output voltage values and/or the output current values of the transformers are abnormal. Rated voltages are carried by primary components of the transformers, and rated loads are connected to secondary components of the transformers. The method, the device and the system have the advantages that the problem of difficulty in detecting 'apparently disconnected but actually connected' and 'intermittent' open-circuit faults of transformers in the prior art can be solved, and effects of increasing the delivery qualified rate of the transformers can be realized.
Description
Technical field
The present invention relates to field transformer, in particular to a kind of transformer open circuit fault detection method, Apparatus and system.
Background technology
The transformer disqualification rate that transformer open circuit causes occupy transformer in production run lost efficacy and after sale transformer fault etc. disqualification rate about 40%.Find according to analysis, cause the reason of transformer open circuit to mainly contain five kinds:
Reason one: the excessive twisting of transformer multi cord causes the damage of the main strand of transformer even to be snapped; Reason two: when using depainting water soaking to enameled wire and adopting the mode of manually smoothing out with the fingers line to carry out depainting, the wound of smoothing out with the fingers causing transformer multi cord is even smoothed out with the fingers disconnected; Reason three: transformer lead pin weld enameled wire is reserved does not weld the number of turns and coiling amplitude discharge stress, causes the enameled wire when " outer eight " point pin be subject to stress and pull or snap; Reason four: line bag is too full, enameled wire exposes skeleton and to be squeezed fracture; Reason five: transformer lead pin weld interval is not enough, the oxidation of tin face and enameled wire fully coating removal and the rosin joint fault that causes.
At present, in order to detect that the open circuit fault of transformer is to reduce transformer disqualification rate after sale in advance, in the related, the direct current resistance of usual measurement test load characteristic and transformer is to detect transformer whether open circuit, this scheme is difficult to the enameled wire damage or the abnormal welding that detect " separated but still in each other's thoughts " and " switch-on and-off ", and the transformer of the enameled wire damage or abnormal welding with " separated but still in each other's thoughts " and " switch-on and-off " assembles through Transport Vibration and production the open circuit fault often occurring being caused by two-time vibration.
For the problem being difficult to detect the transformer with the open circuit fault such as " separated but still in each other's thoughts " and " switch-on and-off " in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of transformer open circuit fault detection method, Apparatus and system, to solve in correlation technique the transformer problem being difficult to detect and having the open circuit fault such as " separated but still in each other's thoughts " and " switch-on and-off ".
To achieve these goals, the invention provides a kind of transformer open circuit fault detection method.The method comprises: detect the output voltage values of transformer and/or output current value, and wherein, the elementary band rated voltage of transformer, secondaryly connects nominal load; Judge whether output voltage values and/or the output current value of transformer exist exception; And if it is abnormal to judge that the output voltage values of transformer and/or output current value exist, then determine that transformer is defective.
Further, below the output voltage values and/or output current value existence of transformer when any one or multiple situation, determine that the output voltage values of transformer and/or output current value exist abnormal: the output voltage values of transformer occurs that voltage is interrupted; There is discontinuous current in the output current value of transformer; The output voltage values of transformer is not within the scope of the qualified voltage preset; The output current value of transformer is not in the qualified range of current preset; Transformer Non voltage output; And transformer no current exports.
Further, the output voltage values and/or the output current value that detect transformer comprise: the output voltage values and/or the output current value that detect multiple transformer simultaneously, wherein, multiple transformer is positioned in multiple pallet respectively, and multiple primary winding terminals is docked to power supply simultaneously, secondary winding docks corresponding load, multiple pallet vibrates along with the vibration of vibration test table in vibration-testing district, judge whether output voltage values and/or the output current value of transformer exist abnormal comprising: the transformer judging whether to exist in multiple transformer output voltage values and/or output current value existence exception, wherein, if there is the transformer of output voltage values and/or output current value existence exception in multiple transformer, transformer open circuit fault detection method also comprises: outputting alarm information, and/or, export the information of the transformer of instruction output voltage values and/or output current value existence exception.
Further, if there is the transformer of output voltage values and/or output current value existence exception in multiple transformer, method also comprises: the transformer that prompting user takes out output voltage values and/or output current value existence exception also stops testing; Detect the transformer that there is exception whether to be removed; If there is abnormal transformer to be removed, then continue to start test; And if the transformer that there is exception is not removed, then keep stopping test.
Further, the information exporting the transformer of instruction output voltage values and/or output current value existence exception comprises: the pilot lamp controlling to exist pallet corresponding to abnormal transformer lights.
To achieve these goals, the invention provides a kind of transformer open circuit fault pick-up unit.This device comprises: the first detecting unit, and for detecting output voltage values and/or the output current value of transformer, wherein, the elementary band rated voltage of transformer, secondaryly connects nominal load; Whether judging unit, exist exception for the output voltage values and/or output current value judging transformer; And determining unit, if exist abnormal for the output voltage values of judging transformer and/or output current value, then determine that transformer is defective.
Further, determining unit also for when any one or multiple situation, determining that the output voltage values of transformer and/or output current value exist abnormal: the output voltage values of transformer occurs that voltage is interrupted below the output voltage values and/or output current value existence of transformer; There is discontinuous current in the output current value of transformer; The output voltage values of transformer is not within the scope of the qualified voltage preset; The output current value of transformer is not in the qualified range of current preset; Transformer Non voltage output; And transformer no current exports.
Further, first detecting unit is also for detecting output voltage values and/or the output current value of multiple described transformer simultaneously, wherein, multiple transformer is positioned in multiple pallet respectively, and multiple primary winding terminals is docked to power supply simultaneously, secondary winding docks corresponding load, multiple pallet vibrates along with the vibration of vibration test table in vibration-testing district, judging unit is also for judging the transformer that whether there is output voltage values and/or output current value existence exception in multiple transformer, wherein, if there is the transformer of output voltage values and/or output current value existence exception in multiple transformer, transformer open circuit fault pick-up unit also comprises: Alarm Unit, for outputting alarm information, and/or the first Tip element, for exporting the information of the transformer of instruction output voltage values and/or output current value existence exception.
Further, if there is the transformer of output voltage values and/or output current value existence exception in multiple transformer, device also comprises: the second Tip element, and the transformer taking out output voltage values and/or output current value existence exception for pointing out user also stops test; Whether the second detecting unit, be removed for detecting the transformer that there is exception; Start unit, if be removed for there is abnormal transformer, then continues to start test; And holding unit, if be not removed for there is abnormal transformer, then keep stopping test.
Further, the pilot lamp of the first Tip element also for controlling to exist pallet corresponding to abnormal transformer lights.
To achieve these goals, the invention provides a kind of transformer open circuit fault detection system.This system comprises: pallet, is arranged on vibration-testing district, and for loading transformer, the wherein elementary band rated voltage of transformer, secondaryly connects nominal load; Vibration test table, for causing the pallet vibration being mounted with transformer in vibration-testing district; And transformer open circuit fault pick-up unit, for detecting output voltage values and/or the output current value of transformer; Judge whether output voltage values and/or the output current value of transformer exist exception; And when the output voltage values and/or output current value of judging transformer exist abnormal, determine that transformer is defective.
Further, this system also comprises: conveyer, for the pallet be placed on it is sent to vibration-testing district, wherein, and the pilot lamp whether transformer in pallet correspondence instruction pallet is abnormal.
By the present invention, adopt and detect the output voltage values of transformer and/or output current value, wherein, the elementary band rated voltage of transformer, secondaryly connects nominal load; Judge whether output voltage values and/or the output current value of transformer exist exception; And if it is abnormal to judge that the output voltage values of transformer and/or output current value exist, then determine that transformer is defective, solve in correlation technique the problem being difficult to detect the transformer with the open circuit fault such as " separated but still in each other's thoughts " and " switch-on and-off ", and then reach the effect of the ex factory pass rate improving transformer.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the transformer open circuit fault detection system of the embodiment of the present invention;
Fig. 2 is the schematic diagram of transformer open circuit fault detection system according to the preferred embodiment of the invention;
Fig. 3 is the schematic diagram of transformer open circuit fault pick-up unit according to a first embodiment of the present invention;
Fig. 4 is the schematic diagram of transformer open circuit fault pick-up unit according to a second embodiment of the present invention;
Fig. 5 is the schematic diagram of transformer open circuit fault pick-up unit according to a third embodiment of the present invention;
Fig. 6 is the process flow diagram of transformer open circuit fault detection method according to a first embodiment of the present invention; And
Fig. 7 is the process flow diagram of transformer open circuit fault detection method according to a second embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Better the present invention program is understood in order to make those skilled in the art, below in conjunction with the accompanying drawing in the embodiment of the present invention, to being clearly and completely described in the embodiment of the present invention, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment obtained under those of ordinary skill in the art do not make creative work prerequisite, all should belong to protection scope of the present invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, and intention is to cover not exclusive comprising
It should be noted that, transformer of the present invention can be the transformer for power supply.
According to embodiments of the invention, provide a kind of transformer open circuit fault detection system, whether this transformer open circuit fault detection system there is open circuit fault for detecting transformer.
Fig. 1 is according to the schematic diagram of the transformer open circuit fault detection system of the embodiment of the present invention.
As shown in Figure 1, this system comprises: pallet 100, vibration test table 200 and transformer open circuit fault pick-up unit 300.
Pallet 100 is arranged on vibration-testing district, and this pallet 100 is for loading transformer, and this pallet 100 can also be used for loading power supply and load.In embodiments of the present invention, the elementary band rated voltage of transformer, the size of the ratings of this rated voltage can be selected according to transformer itself, and this rated voltage can be provided by direct supply, secondaryly connect nominal load, this nominal load can be resistance or bulb.
Vibration test table 200 vibrates for causing the pallet 100 being mounted with transformer in vibration-testing district, like this, can the vibration of analogue transformer in transportation, make test environment more true to nature.The parameters such as the amplitude of vibration test table 200, vibration frequency and time of vibration can have relatively large value according to environmental baseline China automobile cargo transport random vibration acceleration power spectral density of standard highway freight transportation machinery in the frequency band range of 2-10Hz and in conjunction with transformer weight and use the situation setting of production line test, preferably, when the amplitude of vibration test table, vibration frequency and time of vibration be set as 2-3mm, 5-15Hz respectively, be more than or equal to 20s time, testing result is more accurate.
Transformer open circuit fault pick-up unit 300 may be used for the output voltage values and the output current value that detect transformer, also may be used for the output voltage values detecting transformer, or also may be used for the output current value detecting transformer, accordingly, when the physical quantity that transformer open circuit fault pick-up unit 300 detects is output voltage values and the output current value of transformer, then judge whether output voltage values and the output current value of transformer exist exception, if judge that the output voltage values of transformer and output current value exist abnormal, and then determine that transformer is defective, otherwise determine that transformer is qualified, when the physical quantity that transformer open circuit fault pick-up unit 300 detects is the output voltage values of transformer, then judge whether the output voltage values of transformer exists exception, if it is abnormal to judge that the output voltage values of transformer exists, and then determines that transformer is defective, otherwise determines that transformer is qualified, when the physical quantity that transformer open circuit fault pick-up unit 300 detects is the output current value of transformer, then judge whether the output current value of transformer exists exception, if it is abnormal to judge that the output current value of transformer exists, and then determines that transformer is defective, otherwise determines that transformer is qualified.In embodiments of the present invention, transformer open circuit fault pick-up unit 300 can be electrical property test instrument.
Preferably, in embodiments of the present invention, this transformer open circuit fault detection system can also comprise conveyer, and this conveyer is used for the pallet 100 be placed on it to be sent to vibration-testing district.Further preferably, the pilot lamp whether pallet 100 can correspondingly indicate the transformer in pallet 100 abnormal, such as, when the transformer exception that pallet 100 loads, pilot lamp can be red led, otherwise pilot lamp can be green indicating lamp.
Such as, as shown in Figure 2, in the invention process example, pallet 100 can comprise one or more, this one or more pallet 100 can be arranged on conveyer, preferably, pallet 100 can comprise pallet a, pallet b, pallet c ... pallet n, pallet A, pallet B, pallet C ... pallet N, pallet aA, pallet bB, pallet cC ... pallet nN, wherein, pallet a, pallet b, pallet c ... pallet n forms first row, this first row pallet 100 is for loading transformer, and each pallet 100 loads a transformer, pallet A, pallet B, pallet C ... pallet N forms secondary series, this secondary series pallet 100 is also for loading transformer, and each pallet 100 loads a transformer, pallet aA, pallet bB, pallet cC ... pallet nN forms the 3rd row, 3rd row pallet 100 is for loading power supply and load, and each pallet 100 loads a power supply and a load, first row, secondary series and the 3rd row pallet 100 placed side by side, like this, such as, pallet a, pallet A, pallet aA can move in parallel, and the transformer in pallet a and pallet A can share power supply in pallet aA and load, reach the effect simplifying circuit.In the invention process example, pallet 100 can move to vibration-testing district successively with conveyer, when there being pallet 100 to move to vibration-testing district, optical switch or infrared switch are responded to automatically and whether Vibration on Start-up test board 200, transformer power supply and electrical property test instrument be qualified to start detecting transformer.It should be noted that, the number of electrical property test instrument can be determined according to the length of conveyer, be mounted with the corresponding pilot lamp of pallet 100 (Fig. 2 is not shown) of transformer, like this, when the transformer in pallet 100 is defective transformer, corresponding red led lights, and when pallet 100 moves to dismounting district, underproof transformer can be unloaded, reach the effect of the qualification rate improving the transformer dispatched from the factory.
Preferably, in embodiments of the present invention, this transformer open circuit fault detection system can also comprise hummer, and when transformer exception, this hummer may be used for sending buzzing alerting signal.
Pass through the embodiment of the present invention, vibration test table 200 is adopted to provide the test environment of vibration for transformer to be detected, the open circuit fault that transformer is potential can be detected, (such as, " separated but still in each other's thoughts " or " leading to when time breaks " transformer open circuit fault), reach effect more accurately, and then reach the effect of the ex factory pass rate improving transformer.
According to embodiments of the invention, provide a kind of transformer open circuit fault pick-up unit, whether this transformer open circuit fault pick-up unit there is open circuit fault for detecting transformer.
Fig. 3 is the schematic diagram of transformer open circuit fault pick-up unit according to a first embodiment of the present invention.
As shown in Figure 3, this device comprises: the first detecting unit 10, judging unit 20 and determining unit 30.
First detecting unit 10 may be used for the output voltage values and the output current value that detect transformer simultaneously, or may be used for the output voltage values of detection transformer or an output current value.In embodiments of the present invention, the elementary band rated voltage of transformer, the size of the ratings of this rated voltage can be selected according to transformer itself, and this rated voltage can be provided by direct supply, secondaryly connect nominal load, this nominal load can be resistance or bulb.
Judging unit 20 can judge whether the physical quantity that the first detecting unit 10 detects exists exception, when the physical quantity that the first detecting unit 10 detects is output voltage values and the output current value of transformer, judging unit 20 can judge whether the output voltage values of this transformer and output current value exist exception; When the physical quantity that the first detecting unit 10 detects is the output voltage values of transformer, judging unit 20 can judge whether the output voltage values of this transformer exists exception; When the physical quantity that the first detecting unit 10 detects is the output current value of transformer, judging unit 20 can judge whether the output current value of this transformer exists exception.
Particularly, in embodiments of the present invention, below the output voltage values and/or output current value existence of transformer when any one or multiple situation, determining unit 30 can also be used for determining that the output voltage values of transformer and/or output current value exist abnormal: situation one, and the output voltage values of transformer occurs that voltage is interrupted; Situation two, there is discontinuous current in the output current value of transformer; Situation three, the output voltage values of transformer is not within the scope of the qualified voltage preset; Situation four, the output current value of transformer is not in the qualified range of current preset; Situation five, transformer Non voltage output; Situation six, transformer no current exports.Otherwise, can judge the output voltage values of transformer and/or output current value normal.
Output voltage values and output current value that determining unit 30 may be used for when judging transformer exist abnormal, or may be used for when judging that the output voltage values of transformer exists abnormal, or may be used for when judging that the output current value of transformer exists abnormal, then determine that transformer is defective, namely, one is had at least for time abnormal in the output voltage values of transformer and output current value, then can judge that the primary coil of transformer or secondary coil exist open circuit fault, and then can judge that transformer is defective, otherwise can judge that transformer is qualified.
Like this, by adopting the first detecting unit 10, judging unit 20 and determining unit 30, achieve and to detect before dispatching from the factory and to judge whether the primary coil of transformer and secondary coil exist the object of open circuit fault, reach the effect of the disqualification rate reducing the transformer dispatched from the factory.
Fig. 4 is the schematic diagram of transformer open circuit fault pick-up unit according to a second embodiment of the present invention.
As shown in Figure 4, this embodiment can as preferred implementation embodiment illustrated in fig. 3, the transformer open circuit fault pick-up unit of this embodiment, except comprising the first detecting unit 10 of the first embodiment, judging unit 20 and determining unit 30, also comprises Alarm Unit 40 and the first Tip element 50.
The effect of determining unit 30 and identical in the first embodiment, do not repeat them here.
In embodiments of the present invention, transformer can be one or more, first detecting unit 10 may be used for the output voltage values and the output current value that detect multiple transformer simultaneously, or may be used for the output voltage values or the output current value that only detect multiple transformer, in embodiments of the present invention, the elementary band rated voltage of transformer, the size of the ratings of this rated voltage can be selected according to transformer itself, and this rated voltage can be provided by direct supply, secondary this nominal load of nominal load that connects can be resistance or bulb.It should be noted that, in embodiments of the present invention, each transformer can have independent Power supply, and also can share a power supply by multiple transformer, preferably, multiple transformer shares a power supply, like this, can simplify transformer open circuit fault pick-up unit.
Further preferably, multiple transformer can be positioned in multiple pallet respectively, and multiple primary winding terminals is docked to power supply simultaneously, secondary winding docks corresponding load, wherein, multiple pallet can vibrate along with the vibration of vibration test table in vibration-testing district, wherein, the amplitude of vibration test table, the parameter such as vibration frequency and time of vibration can have relatively large value according to environmental baseline China automobile cargo transport random vibration acceleration power spectral density of standard highway freight transportation machinery and set in conjunction with the weight of transformer and the situation of use production line test in the frequency band range of 2-10Hz, preferably, when the amplitude of vibration test table, vibration frequency and time of vibration are set as 2-3mm respectively, 5-15Hz, when being more than or equal to 20s, testing result is more accurate.
Like this, can by the vibration of the vibration simulation freight transportation machinery of vibration test table, make testing environment more true to nature, can realize detecting potential transformer open circuit fault to greatest extent (such as, " separated but still in each other's thoughts " or " logical when time breaks " transformer open circuit fault) object, and then reach testing result effect more accurately.
In embodiments of the present invention, judging unit 20 may be used for when the first detecting unit 10 detects output voltage values and the output current value of multiple transformer simultaneously, judge the transformer that whether there is output voltage values and output current value existence exception in multiple transformer, or may be used for when the first detecting unit 10 only can detect output voltage values or the output current value of multiple transformer, judge the transformer that whether there is corresponding output voltage values or output current value existence exception in multiple transformer.When judging unit 20 judges the transformer that there is output voltage values and output current value existence exception in multiple transformer, or when judging the transformer that there is output voltage values or output current value existence exception in multiple transformer, then above-mentioned transformer is underproof transformer, otherwise above-mentioned transformer is qualified transformer.
For when there is output voltage values in multiple transformer and output current value there is abnormal transformer in Alarm Unit 40, or when there is output voltage values in multiple transformer or output current value there is abnormal transformer, namely when judging unit 20 judges that above-mentioned transformer exists underproof transformer, then outputting alarm information, wherein, this warning information can comprise the information controlling the bright information of pilot lamp or control hummer buzzing, or controls the information of the bright information of pilot lamp and the buzzing of control hummer simultaneously.Like this, whether user can understand transformer in time and deposit qualified, and takes appropriate measures.
The physical quantity that first Tip element 50 can detect according to the first detecting unit 10 is accordingly for exporting the information of the transformer indicating output voltage values and output current value existence exception, or the physical quantity that can detect according to the first detecting unit 10 is accordingly for exporting the information of the transformer of instruction output voltage values or output current value existence exception.Preferably, in embodiments of the present invention, the pilot lamp that the first Tip element 50 can also be used for controlling to exist pallet corresponding to abnormal transformer lights, and like this, user can be picked out there is abnormal transformer exactly by the position of pallet.
It should be noted that, in embodiments of the present invention, this transformer open circuit fault pick-up unit can all comprise Alarm Unit 40 and the first Tip element 50, also can select one and comprise.
Like this, output voltage values and/or the output current value of transformer are provided in the vibration environment provided at vibration test table by the first detecting unit 10, realize detecting potential transformer open circuit fault to greatest extent (such as, " separated but still in each other's thoughts " or " logical when time breaks " transformer open circuit fault) object, and then reach testing result effect more accurately.
Fig. 5 is the schematic diagram of transformer open circuit fault pick-up unit according to a third embodiment of the present invention.
As shown in Figure 5, this embodiment can as preferred implementation embodiment illustrated in fig. 4, the transformer open circuit fault pick-up unit of this embodiment, except comprising the first detecting unit 10 of the first embodiment, judging unit 20, determining unit 30, Alarm Unit 40 and the first Tip element 50, also comprises the second Tip element 60, second detecting unit 70, start unit 80 and holding unit 90.
First detecting unit 10, judging unit 20, determining unit 30, Alarm Unit 40 and the effect of the first Tip element 50 and identical in the first embodiment, do not repeat them here.
Second Tip element 60 takes out output voltage values for the prompting user when there is the transformer of output voltage values and/or output current value existence exception in multiple transformer and/or output current value exists abnormal transformer and stops testing.Whether the second detecting unit 70 is removed for detecting the transformer that there is exception, wherein, whether the second detecting unit 70 can be removed to detect the transformer that there is exception by detecting the light on and off of loading pilot lamp corresponding to the pallet of transformer, when detect load pilot lamp corresponding to the pallet of transformer light become knock out time, then detect that there is abnormal transformer is removed, otherwise when detect load pilot lamp corresponding to the pallet of transformer always for lighting state time, then detect that there is abnormal transformer is not also removed.If start unit 80 is removed for there is abnormal transformer, then continue to start test.If holding unit 90 is not removed for there is abnormal transformer, then keep stopping test.
Like this, can be taken out there is abnormal transformer in time by the prompting of the second Tip element 60 and the second detecting unit 70 and detection effect, reaching and filtering out abnormal transformer in time to improve the effect of the transformer qualification rate of dispatching from the factory.
According to embodiments of the invention, provide a kind of transformer open circuit fault detection method, whether this transformer open circuit fault detection method there is open circuit fault for detecting transformer.This transformer open circuit fault detection method may operate on computer-processing equipment.It should be noted that, the transformer open circuit fault detection method that the embodiment of the present invention provides can be performed by the transformer open circuit fault pick-up unit of the embodiment of the present invention, and the transformer open circuit fault pick-up unit of the embodiment of the present invention also may be used for the transformer open circuit fault detection method performing the embodiment of the present invention.
Fig. 6 is the process flow diagram of transformer open circuit fault detection method according to a first embodiment of the present invention.
As shown in Figure 6, the method comprises following step S101 to step S103:
Step S101, detects output voltage values and/or the output current value of transformer.
In embodiments of the present invention, output voltage values and the output current value of transformer can be detected simultaneously, or can the output voltage values of a detection transformer or output current value.The elementary band rated voltage of transformer, the size of the ratings of this rated voltage can be selected according to transformer itself, and this rated voltage can be provided by direct supply, secondaryly connects nominal load, and this nominal load can be resistance or bulb.
Step S102, judges whether the output voltage values of transformer and/or output current value exist exception.
In embodiments of the present invention, the physical quantity that detects of determining step S101 whether can there is exception, particularly, when the physical quantity that step S101 detects is output voltage values and the output current value of transformer, can judge whether the output voltage values of this transformer and output current value exist exception; When the physical quantity that step S101 detects is the output voltage values of transformer, can judge whether the output voltage values of this transformer exists exception; When the physical quantity that step S101 detects is the output current value of transformer, can judge whether the output current value of this transformer exists exception.
Particularly, in embodiments of the present invention, below the output voltage values and/or output current value existence of transformer when any one or multiple situation, can judge that output voltage values and/or the output current value of transformer exist abnormal: situation one, the output voltage values of transformer occurs that voltage is interrupted; Situation two, there is discontinuous current in the output current value of transformer; Situation three, the output voltage values of transformer is not within the scope of the qualified voltage preset; Situation four, the output current value of transformer is not in the qualified range of current preset; Situation five, transformer Non voltage output; Situation six, transformer no current exports.Otherwise, can judge the output voltage values of transformer and/or output current value normal.When the output voltage values and/or output current value of judging transformer exist abnormal, perform step S103, otherwise perform step S101.
Step S103, determines that described transformer is defective.
In embodiments of the present invention, when the output voltage values and output current value of judging transformer exist abnormal, or it is abnormal when judging that the output voltage values of transformer exists, or it is abnormal when judging that the output current value of transformer exists, then determine that transformer is defective, namely, one is had at least for time abnormal in the output voltage values of transformer and output current value, then can judge that the primary coil of transformer or secondary coil exist open circuit fault, and then can judge that transformer is defective, otherwise can judge that transformer is qualified.
Like this, by above-mentioned steps, achieve and to detect before dispatching from the factory and to judge whether the primary coil of transformer and secondary coil exist the object of open circuit fault, reach the effect of the disqualification rate reducing the transformer dispatched from the factory.
Fig. 7 is the process flow diagram of transformer open circuit fault detection method according to a second embodiment of the present invention.
As shown in Figure 7, this transformer open circuit fault detection method comprises following step S201 to step S204, and this embodiment can as preferred implementation embodiment illustrated in fig. 6.
Step S201, detects output voltage values and/or the output current value of multiple transformer simultaneously.
It should be noted that, the step S101 shown in Fig. 6 comprises the step S201 in the embodiment of the present invention.
In embodiments of the present invention, transformer can be one or more, output voltage values and the output current value of multiple transformer can be detected simultaneously, or only can detect output voltage values or the output current value of multiple transformer, in embodiments of the present invention, the elementary band rated voltage of transformer, the size of the ratings of this rated voltage can be selected according to transformer itself, and this rated voltage can be provided by direct supply, secondary this nominal load of nominal load that connects can be resistance or bulb.It should be noted that, in embodiments of the present invention, each transformer can have independent Power supply, and also can share a power supply by multiple transformer, preferably, multiple transformer shares a power supply, like this, can simplify transformer open circuit fault pick-up unit.
Further preferably, multiple transformer can be positioned in multiple pallet respectively, and multiple primary winding terminals is docked to power supply simultaneously, secondary winding docks corresponding load, wherein, multiple pallet can vibrate along with the vibration of vibration test table in vibration-testing district, wherein, the amplitude of vibration test table, the parameter such as vibration frequency and time of vibration can have relatively large value according to environmental baseline China automobile cargo transport random vibration acceleration power spectral density of standard highway freight transportation machinery and set in conjunction with the weight of transformer and the situation of use production line test in the frequency band range of 2-10Hz, preferably, when the amplitude of vibration test table, vibration frequency and time of vibration are set as 2-3mm respectively, 5-15Hz, when being more than or equal to 20s, testing result is more accurate.
Like this, can by the vibration of the vibration simulation freight transportation machinery of vibration test table, make testing environment more true to nature, can realize detecting potential transformer open circuit fault to greatest extent (such as, " separated but still in each other's thoughts " or " logical when time breaks " transformer open circuit fault) object, and then reach testing result effect more accurately.
Step S202, judges the transformer that whether there is output voltage values and/or output current value existence exception in multiple transformer.
It should be noted that, the step S102 shown in Fig. 6 comprises the step S202 in the embodiment of the present invention.
In embodiments of the present invention, when to detect output voltage values and the output current value of multiple transformer simultaneously, then judge the transformer that whether there is output voltage values and output current value existence exception in multiple transformer, or when only detecting output voltage values or the output current value of multiple transformer, then judge the transformer that whether there is corresponding output voltage values or output current value existence exception in multiple transformer.When judging the transformer that there is output voltage values and output current value existence exception in multiple transformer, or when judging the transformer that there is output voltage values or output current value existence exception in multiple transformer, then above-mentioned transformer is underproof transformer, otherwise above-mentioned transformer is qualified transformer.
Wherein, in embodiments of the present invention, below the output voltage values and/or output current value existence of multiple transformer when any one or multiple situation, can judge that output voltage values and/or the output current value of multiple transformer exist abnormal: situation one, the output voltage values of transformer occurs that voltage is interrupted; Situation two, there is discontinuous current in the output current value of transformer; Situation three, the output voltage values of transformer is not within the scope of the qualified voltage preset; Situation four, the output current value of transformer is not in the qualified range of current preset; Situation five, transformer Non voltage output; Situation six, transformer no current exports.Otherwise, can judge the output voltage values of transformer and/or output current value normal.
Step S203, outputting alarm information.
In embodiments of the present invention, when there is output voltage values in multiple transformer and output current value there is abnormal transformer, or when there is output voltage values in multiple transformer or output current value there is abnormal transformer, when namely judging that above-mentioned transformer exists underproof transformer, then outputting alarm information, wherein, this warning information can comprise the information controlling the bright information of pilot lamp or control hummer buzzing, or controls the information of the bright information of pilot lamp and the buzzing of control hummer simultaneously.Like this, whether user can understand transformer in time and deposit qualified, and takes appropriate measures.
Step S204, exports the information of the transformer of instruction output voltage values and/or output current value existence exception.
The physical quantity that can detect according to step S201 is accordingly for exporting the information of the transformer indicating output voltage values and output current value existence exception, or the physical quantity that can detect according to step S201 is accordingly for exporting the information of the transformer of instruction output voltage values or output current value existence exception.Preferably, in embodiments of the present invention, the information exporting the transformer of instruction output voltage values and/or output current value existence exception can also comprise the pilot lamp controlling to exist pallet corresponding to abnormal transformer and light, like this, user can be picked out there is abnormal transformer exactly by the position of pallet.
It should be noted that, in embodiments of the present invention, the execution sequence of step S203 and step S204 can be put upside down, and step S203 and step S204 can both perform, and also only can perform step S203 or only perform step S204.
Like this, by detecting output voltage values and/or the output current value of transformer in the vibration environment that provides at vibration test table, realize detecting potential transformer open circuit fault to greatest extent (such as, " separated but still in each other's thoughts " or " logical when time breaks " transformer open circuit fault) object, and then reach testing result effect more accurately.
Preferably, in embodiments of the present invention, this transformer open circuit fault detection method is further comprising the steps of:
Step 1: the transformer of pointing out user to take out output voltage values and/or output current value existence exception when there is output voltage values in multiple transformer and/or output current value there is abnormal transformer also stops test.
Step 2: detect the transformer that there is exception and whether be removed, wherein, whether the light on and off of pilot lamp that can be corresponding by the pallet detecting loading transformer are removed to detect the transformer that there is exception, when detect load pilot lamp corresponding to the pallet of transformer light become knock out time, then detect that there is abnormal transformer is removed, otherwise when detect load pilot lamp corresponding to the pallet of transformer always for lighting state time, then detect that there is abnormal transformer is not also removed.
Step 3: be removed if there is abnormal transformer, then continue to start test.
Step 4: be not removed if there is abnormal transformer, then keep stopping test.
Like this, can take out there is abnormal transformer in time, reaching and filtering out abnormal transformer in time to improve the effect of the transformer qualification rate of dispatching from the factory.
From above description, can find out, present invention achieves before transformer dispatches from the factory, under the environment of the vibration of simulation freight transportation machinery, detect potential transformer open circuit fault to greatest extent (such as, " separated but still in each other's thoughts " or " logical when time breaks " transformer open circuit fault) object, reach testing result effect more accurately, and then reach the effect of the ex factory pass rate improving transformer.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a transformer open circuit fault detection method, is characterized in that, comprising:
Detect the output voltage values of transformer and/or output current value, wherein, the elementary band rated voltage of described transformer, secondaryly connects nominal load;
Judge whether output voltage values and/or the output current value of described transformer exist exception; And
If judge that the output voltage values of described transformer and/or output current value exist abnormal, then determine that described transformer is defective.
2. transformer open circuit fault detection method according to claim 1, it is characterized in that, below the output voltage values and/or output current value existence of described transformer when any one or multiple situation, determine that the output voltage values of described transformer and/or output current value exist abnormal:
The output voltage values of described transformer occurs that voltage is interrupted;
There is discontinuous current in the output current value of described transformer;
The output voltage values of described transformer is not within the scope of the qualified voltage preset;
The output current value of described transformer is not in the qualified range of current preset;
Described transformer Non voltage output; And
Described transformer no current exports.
3. transformer open circuit fault detection method according to claim 1, is characterized in that,
The output voltage values and/or the output current value that detect transformer comprise: the output voltage values and/or the output current value that detect multiple described transformer simultaneously, wherein, multiple described transformer is positioned in multiple pallet respectively, and multiple described primary winding terminals is docked to power supply simultaneously, secondary winding docks corresponding load, described multiple pallet vibrates along with the vibration of vibration test table in vibration-testing district
Judge whether output voltage values and/or the output current value of described transformer exist abnormal comprising: the transformer judging whether to exist in multiple described transformer output voltage values and/or output current value existence exception,
Wherein, if there is the transformer of output voltage values and/or output current value existence exception in multiple described transformer, described transformer open circuit fault detection method also comprises: outputting alarm information; And/or, export the information of the transformer of instruction output voltage values and/or output current value existence exception.
4. transformer open circuit fault detection method according to claim 3, is characterized in that, if there is the transformer of output voltage values and/or output current value existence exception in multiple described transformer, described method also comprises:
Prompting user takes out output voltage values and/or output current value exists abnormal transformer and stops test;
Detect the transformer that there is exception whether to be removed;
If there is abnormal transformer to be removed, then continue to start test; And
If there is abnormal transformer not to be removed, then keep stopping test.
5. transformer open circuit fault detection method according to claim 3, it is characterized in that, the information exporting the transformer of instruction output voltage values and/or output current value existence exception comprises: the pilot lamp controlling to exist pallet corresponding to abnormal transformer lights.
6. a transformer open circuit fault pick-up unit, is characterized in that, comprising:
First detecting unit, for detecting output voltage values and/or the output current value of transformer, wherein, the elementary band rated voltage of described transformer, secondaryly connects nominal load;
Whether judging unit, exist exception for the output voltage values and/or output current value judging described transformer; And
Determining unit, if exist abnormal for the output voltage values of judging described transformer and/or output current value, then determines that described transformer is defective.
7. transformer open circuit fault pick-up unit according to claim 6, it is characterized in that, described determining unit also for when any one or multiple situation, determining that the output voltage values of described transformer and/or output current value exist abnormal below the output voltage values and/or output current value existence of described transformer:
The output voltage values of described transformer occurs that voltage is interrupted;
There is discontinuous current in the output current value of described transformer;
The output voltage values of described transformer is not within the scope of the qualified voltage preset;
The output current value of described transformer is not in the qualified range of current preset;
Described transformer Non voltage output; And
Described transformer no current exports.
8. transformer open circuit fault pick-up unit according to claim 6, is characterized in that,
Described first detecting unit is also for detecting output voltage values and/or the output current value of multiple described transformer simultaneously, wherein, multiple described transformer is positioned in multiple pallet respectively, and multiple described primary winding terminals is docked to power supply simultaneously, secondary winding docks corresponding load, described multiple pallet vibrates along with the vibration of vibration test table in vibration-testing district
Described judging unit also for judging whether to exist in multiple described transformer output voltage values and/or output current value exists abnormal transformer,
Wherein, if there is the transformer of output voltage values and/or output current value existence exception in multiple described transformer, described transformer open circuit fault pick-up unit also comprises: Alarm Unit, for outputting alarm information; And/or the first Tip element, for exporting the information of the transformer of instruction output voltage values and/or output current value existence exception.
9. transformer open circuit fault pick-up unit according to claim 8, is characterized in that, if there is the transformer of output voltage values and/or output current value existence exception in multiple described transformer, described device also comprises:
Second Tip element, takes out output voltage values for pointing out user and/or output current value exists abnormal transformer and stops test;
Whether the second detecting unit, be removed for detecting the transformer that there is exception;
Start unit, if be removed for there is abnormal transformer, then continues to start test; And
Holding unit, if be not removed for there is abnormal transformer, then keeps stopping test.
10. transformer open circuit fault pick-up unit according to claim 8, is characterized in that, the pilot lamp of described first Tip element also for controlling to exist pallet corresponding to abnormal transformer lights.
11. 1 kinds of transformer open circuit fault detection systems, is characterized in that, comprising:
Pallet, is arranged on vibration-testing district, and for loading transformer, the elementary band rated voltage of wherein said transformer, secondaryly connects nominal load;
Vibration test table, for causing the described pallet vibration being mounted with described transformer in described vibration-testing district; And
Transformer open circuit fault pick-up unit, for detecting output voltage values and/or the output current value of transformer; Judge whether output voltage values and/or the output current value of described transformer exist exception; And when the output voltage values and/or output current value of judging described transformer exist abnormal, determine that described transformer is defective.
12. transformer open circuit fault detection systems according to claim 11, is characterized in that, also comprise:
Conveyer, for the described pallet be placed on it is sent to described vibration-testing district, wherein, the pilot lamp whether described transformer in the described pallet of described pallet correspondence instruction is abnormal.
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