CN204595152U - Be applied to the variable-frequency motor PDIV Auto-Test System under power frequency - Google Patents
Be applied to the variable-frequency motor PDIV Auto-Test System under power frequency Download PDFInfo
- Publication number
- CN204595152U CN204595152U CN201520279769.1U CN201520279769U CN204595152U CN 204595152 U CN204595152 U CN 204595152U CN 201520279769 U CN201520279769 U CN 201520279769U CN 204595152 U CN204595152 U CN 204595152U
- Authority
- CN
- China
- Prior art keywords
- variable
- type transformer
- pdiv
- patch bay
- test electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model discloses a kind of variable-frequency motor PDIV Auto-Test System be applied under power frequency, comprise PC, the AD capture card that output terminal is connected with PC, the CT sensor that output terminal is all connected with AD capture card signal input part and High Pressure Difference sub-probe, the programmable AC power supply that input end is connected with PC, the dry-type transformer that input end is connected with programmable AC power supply output terminal, and baking oven and have Hi-pot test electrode with ground test electrode patch bay; Patch bay is located at oven interior; The high-voltage output end of dry-type transformer connects the Hi-pot test electrode of patch bay, and the dry-type transformer other end connects the ground test electrode of patch bay via CT sensor; High Pressure Difference sub-probe input end connects Hi-pot test electrode and the ground test electrode of patch bay simultaneously.The utility model is reasonable in design, simple operation, and test the feature that variable-frequency motor PDIV precision is high, test dispersiveness is little under having power frequency, therefore this practicality has very high using value.
Description
Technical field
The utility model relates to a kind of Auto-Test System, and what be specifically related to is a kind of variable-frequency motor PDIV(partial discharge inception voltage be applied under power frequency) Auto-Test System.
Background technology
Fast development based on the frequency conversion drive of width modulation (PWM) technology has promoted the widespread use of variable-frequency motor in every profession and trade.Home and abroad a large number of users and research institution's reflection, the phenomenon of frequency control motor ubiquity insulation earlier period damage, the serviceable life of many alternating-current variable frequency motors is very short, long then 2 years or 1 year, short, only have several week, just there is the situation that electrical machine insulation damages in even indivedual motor, which results in the extensive concern of home and abroad scholar and expert between trial run period.
Shelf depreciation causes the one of the main reasons of variable-frequency motor insulation damages.When shelf depreciation occurs, the shock of space electronic and ion, causes the erosion on insulating material surface, and the office of adding puts energy ezpenditure and produces local overheating, causes superpolymer cracking.Meanwhile, the ozone produced in shelf depreciation and radiation ray and other product and insulating material chemically reactive, make insulating material performance degradation, insulating material goes bad, and finally makes failure of insulation.
Because shelf depreciation can accelerate insulation ag(e)ing, insulation of electrical installation is caused to lose efficacy, in the operational process of electrical equipment, the generation of shelf depreciation should be avoided under most cases, therefore, in electrical equipment factory inspection and acceptance test, partial discharge inception voltage (PDIV) is the important parameter evaluating insulating property.
The international electrical engineering standard council defines I type motor and II type motor, and wherein I type motor does not allow to occur shelf depreciation in course of normal operation.For improving variable-frequency motor insulating reliability, for I type motor, its insulation system forms primarily of organic insulation, emerged in operation shelf depreciation can cause the larger shortening of electrical machine insulation life-span, therefore the PDIV of motor electrical insulation system must be less than the voltage in actual motion, and PDIV is significant with qualified detection of dispatching from the factory for evaluation variable-frequency motor insulation system for test power-frequency voltage down coversion motor.
Existing power frequency down coversion motor PDIV testing apparatus also rests on laboratory and builds link, the test macro that neither one is complete, means of testing is rough, measuring accuracy and automaticity are not high, thus PDIV is tested, not only manpower and materials consumption is large for this, and the PDIV test data of same variable-frequency motor often has very large dispersiveness.
Utility model content
The purpose of this utility model is to provide a kind of variable-frequency motor PDIV Auto-Test System be applied under power frequency, mainly solves and to test under prior art exists power frequency that variable-frequency motor PDIV is insensitive, error large, the problem of the dispersed large and inconvenient operation of test.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Be applied to the variable-frequency motor PDIV Auto-Test System under power frequency, comprise PC, output terminal connects the AD capture card of this PC by pci interface, the CT sensor that output terminal is all connected with this AD capture card signal input part and High Pressure Difference sub-probe, input end connects the programmable AC power supply of PC by RS232 interface, the dry-type transformer that input end is connected with this programmable AC power supply output terminal, and baking oven and there is Hi-pot test electrode with ground test electrode and for the patch bay of fixing variable-frequency motor; Described patch bay is arranged on oven interior; The high-voltage output end of described dry-type transformer connects the Hi-pot test electrode of patch bay, and the other end of this dry-type transformer connects the ground test electrode of patch bay via CT sensor; Described High Pressure Difference sub-probe input end connects Hi-pot test electrode and the ground test electrode of patch bay simultaneously.
As preferably, described dry-type transformer is single-phase dry-type transformer.
As preferably, described CT sensor is Rogowski coil current sensor.
Further, also overcurrent protector is provided with between described dry-type transformer high-voltage output end and patch bay Hi-pot test electrode.
Again further, described dry-type transformer connects one end also ground connection of CT sensor.
Compared with prior art, the utility model has following beneficial effect:
(1) reasonable in design, the simple operation of the utility model, variable-frequency motor PDIV measuring accuracy are high.
(2) the utility model adopts CT sensor test ground electrode local discharge signal, can increase the gain of local discharge signal, thus accurately judge the generation of local discharge signal; Adopting the test of High Pressure Difference sub-probe to be added in the voltage signal at variable-frequency motor two ends, can avoiding, by utilizing in transformation ratio of dry type transformer conversion process, making the inaccurate situation of result of calculation due to factors such as dry-type transformer leakage inductances; And the signal of High Pressure Difference sub-probe and the output of CT sensor is read by AD capture card, and after cooperation PC, by the process controlled programmable AC power supply and to Partial Discharge Data, then achieve digitizing and the automatic business processing of the full-automatic PDIV test of electromagnetic wire under power frequency, not only test result is accurate, highly sensitive for it, and test is dispersed little.
(3) dry-type transformer in the utility model preferably adopts single-phase dry-type transformer, its have volume little, lightweight, safeguard the advantages such as simple, reliable, be suitable for very much variable-frequency motor voltage-regulation.
(4) the CT sensor in the utility model preferably adopts Rogowski coil current sensor, and not only output power is low for it, structure simple, and the linearity is excellent, can efficiently, low-power test ground electrode local discharge signal and transmit.
(5) the utility model is provided with overcurrent protector; can prevent owing to testing electric current when variable-frequency motor punctures excessive and cause each element in system to occur damaging; and dry-type transformer one end also ground connection; thus; not only extend the serviceable life of each element further, and ensure that the security of test.
(6) the utility model cost performance is high, practical, filling up the blank of power frequency down coversion motor PDIV test aspect well, having provided guarantee for evaluating variable-frequency motor insulation system with qualified detection of dispatching from the factory, therefore, the utility model is with a wide range of applications, and is suitable for applying.
Accompanying drawing explanation
Fig. 1 is system architecture diagram of the present utility model.
Wherein, the parts name that Reference numeral is corresponding is called:
1-PC machine, 2-programmable AC power supply, 3-dry-type transformer, 4-overcurrent protector, 5-patch bay, 6-baking oven, 7-CT sensor, 8-High Pressure Difference sub-probe, 9-AD capture card.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 1, the utility model is mainly used in testing variable-frequency motor partial discharge inception voltage, it comprises PC 1, programmable AC power supply 2, dry-type transformer 3, patch bay 5, baking oven 6, CT sensor 7, High Pressure Difference sub-probe 8 and AD capture card 9, and the parameter situation of equipment component is as follows:
Programmable AC power supply: input AC frequency: 50Hz, voltage: 220V, power: 1KVA, possesses RS232 interface communication, output voltage: 0 ~ 380V, frequency: 10Hz ~ 100Hz, adjustable accuracy: 0.1V;
Dry-type transformer: the present embodiment is preferably single-phase dry-type transformer, fixing no-load voltage ratio is 380:8000, power 1kVA;
CT sensor: the present embodiment is preferably Rogowski coil current sensor, its centre frequency: 30MHz;
Patch bay: there is Hi-pot test electrode and ground test electrode;
Baking oven: adjustable temperature: 0 ~ 200 DEG C;
High Pressure Difference sub-probe: attenuation ratio: 1000:1, can divide high voltage to reach ± 7000V by error of measurement;
AD capture card: binary channels, 12bit, parallel, 100Msps sampling rate, possess pci interface;
PC: mainboard possesses pci interface and RS232 interface.
Described PC 1 connects the input end of programmable AC power supply 2 by RS232 interface, connected the output terminal of AD capture card 9 by pci interface.Described dry-type transformer 3 input end connects the output terminal of programmable AC power supply 2, and the high-voltage output end of this dry-type transformer 3 connects the Hi-pot test electrode of patch bay 5, and the other end then connects the ground test electrode of patch bay 5 via CT sensor 7.
Described patch bay 5 is arranged in baking oven 6, and it is for fixing variable-frequency motor.And; in order to prevent the utility model in use; cause each element in the utility model to occur damaging owing to testing electric current when variable-frequency motor model machine punctures excessive, between dry-type transformer 3 high-voltage output end and patch bay 5 Hi-pot test electrode, be also provided with an overcurrent protector 4.In addition, described dry-type transformer 3 connects one end also ground connection of CT sensor 7, and described CT sensor 7 is then connected the signal input part of AD capture card 9 with the output terminal of High Pressure Difference sub-probe 8 all simultaneously.
The utility model have employed the ripe control technology of existing application and equipment, and is combined by these technology and equipments by reasonable manner, thus achieves the test of power frequency down coversion motor PDIV well, has filled up the blank of this respect.Not only measuring accuracy is high for the utility model, test is dispersed little, and simple operation, and therefore, it compared with prior art has substantial feature and progress.
Above-described embodiment is only preferred embodiment of the present utility model; it is not the restriction to the utility model protection domain; in every case design concept of the present utility model being adopted, and the change carried out non-creativeness work on this basis and make, all should belong within protection domain of the present utility model.
Claims (5)
1. be applied to the variable-frequency motor PDIV Auto-Test System under power frequency, it is characterized in that: comprise PC (1), output terminal connects the AD capture card (9) of this PC (1) by pci interface, the CT sensor (7) that output terminal is all connected with this AD capture card (9) signal input part and High Pressure Difference sub-probe (8), input end connects the programmable AC power supply (2) of PC (1) by RS232 interface, the dry-type transformer (3) that input end is connected with this programmable AC power supply (2) output terminal, and baking oven (6) and have Hi-pot test electrode with ground test electrode, and for the patch bay (5) of fixing variable-frequency motor, it is inner that described patch bay (5) is arranged on baking oven (6), the high-voltage output end of described dry-type transformer (3) connects the Hi-pot test electrode of patch bay (5), and the other end of this dry-type transformer (3) connects the ground test electrode of patch bay (5) via CT sensor (7), described High Pressure Difference sub-probe (8) input end connects Hi-pot test electrode and the ground test electrode of patch bay (5) simultaneously.
2. the variable-frequency motor PDIV Auto-Test System be applied under power frequency according to claim 1, is characterized in that: described dry-type transformer (3) is single-phase dry-type transformer.
3. the variable-frequency motor PDIV Auto-Test System be applied under power frequency according to claim 2, is characterized in that: described CT sensor (7) is Rogowski coil current sensor.
4. the variable-frequency motor PDIV Auto-Test System be applied under power frequency according to claims 1 to 3 any one, is characterized in that: be also provided with overcurrent protector (4) between described dry-type transformer (3) high-voltage output end and patch bay (5) Hi-pot test electrode.
5. the variable-frequency motor PDIV Auto-Test System be applied under power frequency according to claim 4, is characterized in that: described dry-type transformer (3) connects one end also ground connection of CT sensor (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520279769.1U CN204595152U (en) | 2015-05-04 | 2015-05-04 | Be applied to the variable-frequency motor PDIV Auto-Test System under power frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520279769.1U CN204595152U (en) | 2015-05-04 | 2015-05-04 | Be applied to the variable-frequency motor PDIV Auto-Test System under power frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204595152U true CN204595152U (en) | 2015-08-26 |
Family
ID=53931297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520279769.1U Expired - Fee Related CN204595152U (en) | 2015-05-04 | 2015-05-04 | Be applied to the variable-frequency motor PDIV Auto-Test System under power frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204595152U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866637A (en) * | 2016-03-29 | 2016-08-17 | 四川大学 | System and method for automatically testing interphase and phase-to-ground insulation PDIV of variable frequency motor |
| CN106980087A (en) * | 2017-05-10 | 2017-07-25 | 中冶京诚工程技术有限公司 | Variable frequency control machine, and test system and method of variable frequency motor |
| CN108152354A (en) * | 2018-02-05 | 2018-06-12 | 四川大学 | A kind of dielectric material surface charge self-operated measuring unit based on two axis slide units |
| CN112904161A (en) * | 2021-01-22 | 2021-06-04 | 四川大学 | Method for testing main insulation and turn-to-turn insulation of variable frequency motor and topological structure |
-
2015
- 2015-05-04 CN CN201520279769.1U patent/CN204595152U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866637A (en) * | 2016-03-29 | 2016-08-17 | 四川大学 | System and method for automatically testing interphase and phase-to-ground insulation PDIV of variable frequency motor |
| CN106980087A (en) * | 2017-05-10 | 2017-07-25 | 中冶京诚工程技术有限公司 | Variable frequency control machine, and test system and method of variable frequency motor |
| CN106980087B (en) * | 2017-05-10 | 2019-08-02 | 中冶京诚工程技术有限公司 | Variable frequency control machine, and test system and method of variable frequency motor |
| CN108152354A (en) * | 2018-02-05 | 2018-06-12 | 四川大学 | A kind of dielectric material surface charge self-operated measuring unit based on two axis slide units |
| CN112904161A (en) * | 2021-01-22 | 2021-06-04 | 四川大学 | Method for testing main insulation and turn-to-turn insulation of variable frequency motor and topological structure |
| CN112904161B (en) * | 2021-01-22 | 2022-04-05 | 四川大学 | Method for testing main insulation and turn-to-turn insulation of variable frequency motor and topological structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3045930B1 (en) | Testing system of gis electronic mutual inductor and method therefor | |
| CN203881897U (en) | Device for measuring insulating state of capacitive current transformer | |
| CN204595152U (en) | Be applied to the variable-frequency motor PDIV Auto-Test System under power frequency | |
| CN105676081B (en) | Direct current cable extrusion insulation aging state evaluation method based on ultralow frequency dielectric loss | |
| CN105182126B (en) | Improved distribution transformer energy efficiency metering detection method | |
| CN103954896A (en) | Oiled paper insulation partial discharge inception voltage test system | |
| CN103217658A (en) | Calibration evaluating system and method of partial discharge ultrahigh-frequency detecting device based on GTEM | |
| CN202854255U (en) | Capacitor type potential transformer testing device | |
| CN106771895A (en) | A kind of cable degradation detecting method based on magnetic field harmonics detection | |
| CN102998529A (en) | Insulation resistance testing method | |
| CN109387804B (en) | Flexible direct system statistical method and metering device precision detection method and system | |
| Lv et al. | Influence of protrusions on the positive switching impulse breakdown voltage of sphere‐plane air gaps in high‐altitude areas | |
| CN102253089A (en) | Method for nondestructively detecting and evaluating mass defect level of high-voltage ceramic capacitors | |
| CN201965224U (en) | Automatic school system that examines of proof voltage instrument | |
| CN106526356A (en) | Metal oxide lightning arrester live-line detection validity test system | |
| CN104122455A (en) | Transformer paper oil insulation frequency domain dielectric response testing device with shield drivers | |
| CN107612642A (en) | A kind of signal band and out-of-band interference level method of testing | |
| CN104297604A (en) | Test system and method for influences of harmonic waves on temperature rise and loss of parallel capacitors | |
| CN108181513B (en) | Inter-phase coupling capacitance testing method and system for lightning arrester based on pilot frequency method | |
| CN108896947B (en) | On-site calibration method and transient voltage measurement method of converter station direct current field transient voltage non-contact measurement device | |
| CN116008687A (en) | Test method for H-MOA aging characteristics | |
| CN106772200A (en) | CVT error in dipping anomaly assessment method and system based on capacitive earth current | |
| CN207232366U (en) | A kind of transformer high-frequency test instrument sensitivity and the inspection circuit of the linearity | |
| CN206387901U (en) | CVT error in dipping anomaly assessment systems based on capacitive earth current | |
| CN105223422A (en) | Digital dielectric loss measurement system device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20200504 |