CN202735462U - Apparatus for detecting short circuit of rotor winding - Google Patents
Apparatus for detecting short circuit of rotor winding Download PDFInfo
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- CN202735462U CN202735462U CN 201220219065 CN201220219065U CN202735462U CN 202735462 U CN202735462 U CN 202735462U CN 201220219065 CN201220219065 CN 201220219065 CN 201220219065 U CN201220219065 U CN 201220219065U CN 202735462 U CN202735462 U CN 202735462U
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- rotor
- short circuit
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- digital processing
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
An apparatus for detecting short circuits of rotor windings comprises a body assembly and an electric control mechanism. The body assembly is composed of a stator, a rotor and rotor windings disposed inside the rotor. A gap layer is formed between the stator and the inside rotor. A sensor is arranged inside the gap layer. The electric control mechanism comprises a signal pre-processor, a digital processor, a display, a communication interface, a keyboard and a power supply. A signal output terminal of the senor is connected with a signal input terminal of the signal pre-processor. An output terminal of the signal pre-processor is connected with an input terminal of the digital processor. The sensor is adopted to differentiate a rotary magnetic field in an air gap of a running synchronous generator, and differential waveforms are analyzed through the digital processor, thereby determining short circuit faults among turns of the rotor windings and determining positions of grooves. Therefore, the apparatus helps to realize on-line detection for short circuit states among the turns of the motor rotor windings.
Description
Technical field
The utility model relates to a kind of checkout equipment of generator, relates in particular to a kind of checkout equipment of rotor short circuit in winding.
Background technology
The generator amature winding turns asks that short circuit is a kind of common electric fault, and slight turn-to-turn short circuit can not have much impact to generator operation, if fault continues development, with the safety of entail dangers to generator and electric system.Rotor winding to genset carries out status monitoring, is intended to find hidden failure, prevents the generation of serious accident.Therefore, mechanism and the method for diagnosing status of research rotor interturn short-circuit fault have important practical significance.Traditional generator shorted-turn fault detection method has single radial cut transformer method, two opening transformer methods, AC impedance and power attenuation rate method, dc resistance method, generator zero load and short circuit curve experimental method, but all can not under actual operating mode, detect, the condition of its detection and the equivalence of actual operating mode are also poor, can't realize that operation detects, dc resistance method for example, generator zero load and short circuit curve experimental method can not accurately record the groove position that turn-to-turn short circuit occurs, can only be as the reference of short trouble and development trend thereof, also because the dynamic turn-to-turn short circuit in the actual motion often disappears with rotor static or alleviates, said method can't catch dynamic shorted-turn fault.So far, under the generator normal operating condition, prior art still can not provide the information of shorted-turn fault judgement, localization of fault and the fault order of severity simultaneously, therefore needs certain improvement.
The utility model content
For above defective, the utility model provides a kind of checkout equipment of rotor short circuit in winding, to solve many deficiencies of prior art.
For achieving the above object, the utility model is by the following technical solutions:
A kind of checkout equipment of rotor short circuit in winding, comprise cylinder block set and electrical control mechanism two parts, described cylinder block set is comprised of stator, rotor and the rotor winding that is arranged in the rotor, forms clearance layer between described stator and the inner rotator, is provided with sensor in the described clearance layer; Described electrical control mechanism comprises signal preprocessor, digital processing unit, display, communication interface, keyboard and power supply, the signal output part of described sensor is connected with the input end of signal preprocessor, described signal preprocessor output terminal is connected with the input end of digital processing unit, described digital processing unit external input terminals connects keyboard and power supply, the outside output terminal connecting communication interface of digital processing unit and display.
Described signal preprocessor is linked in sequence successively by amplifier, wave filter, level lifting circuit and A/D converter and forms.
Beneficial effect:The utility model can be realized detecting online and whether diagnosis rotor winding exists or shorted-turn fault occurs, and locates simultaneously the groove position of breaking down; By sensor the rotating magnetic field in the operating synchronous generator air gap is carried out differential, and can judge that to differentiated waveform analysis the rotor winding has or not the position of shorted-turn fault and place groove thereof through digital processing unit, thereby realized the online detection to the motor rotor winding interturn short-circuit state.
Description of drawings
Fig. 1 is the structural representation of cylinder block set of the present invention.
Fig. 2 is electrical control mechanism principle schematic of the present invention.
Fig. 3 is the principle schematic of signal preprocessor of the present invention.
Among the figure: 1 stator, 2 clearance layer, 3 rotors, 4 sensors, 5 rotor windings, 6 signal preprocessors, 7 digital processing units, 8 displays, 9 communication interfaces, 10 keyboards, 11 power supplys, 12 amplifiers, 13 wave filters, 14 level lifting circuit, 15 A/D converters.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Shown in Fig. 1～3, the checkout equipment of rotor short circuit in winding, comprise cylinder block set and electrical control mechanism two parts, cylinder block set wherein is comprised of stator 1, rotor 3 and the rotor windings 5 that are arranged in the rotor 3, between having turned 3, outer stator 1 and inside forms clearance layer 2, the described clearance layer 2 interior sensors 4 that arrange; Described sensor 4 is for gathering the rotor slot leakage field gesture differential detecting coil in the air-gap field, its particular location is arranged at the axial optional position of rotor 3, radially the distance apart from rotor 3 surfaces is the 1/4-3/4 of airbond length, the signal output part of this sensor 4 is connected with the signal preprocessor of outside electrical control mechanism 6 input ends, described signal preprocessor 6 output terminals are connected with the input end of digital processing unit 7, these digital processing unit 7 external input terminals also are connected to respectively keyboard 10 and power supply 11, and these digital processing unit 7 outside output terminals also are connected to communication interface 9 and display 8.In addition, the above signal preprocessor 6 inside is linked in sequence successively by amplifier 12, wave filter 13, level lifting circuit 14 and A/D converter 15 and forms, and amplifier 12 wherein is connected with sensor 4, and A/ D converter l5 is connected with digital processing unit 7.
The checkout equipment of the described rotor short circuit in winding of above the utility model embodiment, when work, described sensor 4 collects the data waveform of generator, one of them crest value correspondence has turned a groove winding of 3, the signal that gathers is fainter, through amplifier 12, wave filter 13, send in the digital processing unit 7 after level lifting circuit 14 and the A/D converter 15, the data analysis that gathers is processed, after the winding generation turn-to-turn short circuit in a certain groove, on leakage field gesture waveform, be reflected as intuitively leakage field gesture crest corresponding to this groove and obvious recessed contracting occurs, digital processing unit 7 can extract wave crest point corresponding to each groove, automatically finish the diagnosis of fault by operational analysis, fault groove location and the fault order of severity are analyzed, and finish demonstration to result by display 8 and communication interface 9 simultaneously, the functions such as communication.In addition, dynamic measuring method comprises the indirect differentiation of S.C. method and towering method of Hall, and tangential differential coil method the and radially the direct differential method etc. of differential coil method is multiple, wherein so that radially differential coil method effect is best, and simple.
Above demonstration and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. the checkout equipment of a rotor short circuit in winding, comprise cylinder block set and electrical control mechanism two parts, described cylinder block set is comprised of stator, rotor and the rotor winding that is arranged in the rotor, it is characterized in that, form clearance layer between described stator and the inner rotator, be provided with sensor in the described clearance layer; Described electrical control mechanism comprises signal preprocessor, digital processing unit, display, communication interface, keyboard and power supply, the signal output part of described sensor is connected with the input end of signal preprocessor, described signal preprocessor output terminal is connected with the input end of digital processing unit, described digital processing unit external input terminals connects keyboard and power supply, the outside output terminal connecting communication interface of digital processing unit and display.
2. the checkout equipment of a kind of rotor short circuit in winding according to claim 1 is characterized in that, described signal preprocessor is linked in sequence successively by amplifier, wave filter, level lifting circuit and A/D converter and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220219065 CN202735462U (en) | 2012-05-16 | 2012-05-16 | Apparatus for detecting short circuit of rotor winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220219065 CN202735462U (en) | 2012-05-16 | 2012-05-16 | Apparatus for detecting short circuit of rotor winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202735462U true CN202735462U (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220219065 Expired - Fee Related CN202735462U (en) | 2012-05-16 | 2012-05-16 | Apparatus for detecting short circuit of rotor winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202735462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680656A (en) * | 2016-12-30 | 2017-05-17 | 北京中元瑞讯科技有限公司 | Analysis method for turn to turn fault of hydro generator unit based on online data |
-
2012
- 2012-05-16 CN CN 201220219065 patent/CN202735462U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680656A (en) * | 2016-12-30 | 2017-05-17 | 北京中元瑞讯科技有限公司 | Analysis method for turn to turn fault of hydro generator unit based on online data |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20140516 |