CN102650674A - Oscillatory wave high voltage generator used for electrical test - Google Patents
Oscillatory wave high voltage generator used for electrical test Download PDFInfo
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- CN102650674A CN102650674A CN2011100503308A CN201110050330A CN102650674A CN 102650674 A CN102650674 A CN 102650674A CN 2011100503308 A CN2011100503308 A CN 2011100503308A CN 201110050330 A CN201110050330 A CN 201110050330A CN 102650674 A CN102650674 A CN 102650674A
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- high voltage
- voltage generator
- inductor
- semiconductor switch
- test
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Abstract
The invention discloses an oscillatory wave high voltage generator used for electrical test and relates to a high voltage generator, in particular to an oscillatory wave high voltage generator used for electrical test. In order to overcome the defect of heaviness of a general oscillatory wave high voltage generator, enable the test voltage to achieve 2MV or more than 2MV, and meet the requirements of local test, the oscillatory wave high voltage generator utilizes a double-LC circuit which is capable of commutation and consists of a super capacitor, an inductor, a semiconductor switch and a test object, when the oscillatory wave high voltage generator is used, the power supply is conducted to charge the super capacitor, then the semiconductor switch is conducted to discharge the super capacitor and excite the inductor, and when the discharging current reaches a maximum value, the semiconductor switch is turned off, the inductor is demagnetized so as to charge the test object, as a result, the oscillatory wave high voltage generator is generated on the test object. Compared with a general device, the oscillatory wave high voltage generator makes the tests such as operation wave impact at site possible as the mass is reduced greatly. In addition, when the pressurization is conducted, the local test can be conducted simultaneously as the circuit is passive and the power supply interference does not exist.
Description
Technical field the present invention relates to high-voltage generator, and particularly wave of oscillation high pressure generator is used in electrical test.
Background technology all will be tested and assesses before power circuit is put into operation or after the maintenance the state of insulation of force device or equipment, and AC power frequency and impulse withstand voltage are two basic and important tests in these works for inspection.Utilize wave of oscillation voltage to carry out the test feature that withstand voltage test has power frequency and impact concurrently, also be convenient to office and put measurement, can check the insulating property of test specimen better.Along with the Power Electronic Technique progress, this test unit original technique obstacle is able to overcome, and develops into the stage of applying at present.But existing wave of oscillation high pressure generator all is to adopt power supply directly charge the again method of short circuit dischange of test specimen (being equivalent to electric capacity) to be produced wave of oscillation high pressure; No matter adopt direct supply or AC power; Both equipment is all huge and heavy, even is difficult to be applied to site test.
Summary of the invention the object of the present invention is to provide a kind of electrical test to use wave of oscillation high pressure generator, overcomes the drawback of wave of oscillation high pressure generator heaviness in the past, makes trial voltage reach 2MV even higher, and satisfies the local discharge test requirement.For achieving this end; But the present invention utilizes ultracapacitor, inductor and semiconductor switch and test specimen to form two LC loop of the change of current; Ultracapacitor and inductor constitute the LC loop when being the semiconductor switch conducting, and inductor and test specimen constituted the LC loop when semiconductor switch turn-offed.Elder generation's energized is the ultracapacitor charging during work; The conducting semiconductor switch is by ultracapacitor discharge, inductor excitation then; When discharge current reaches maximal value, break off semiconductor switch, inductor degaussing this moment is the test specimen charging, and the result produces wave of oscillation high pressure above that.The present invention utilizes the excitation and the demagnetization process of inductor; Transfer to the energy in the ultracapacitor on the test specimen; As long as select the equivalent electric capacity of the electric capacity of ultracapacitor, just can on test specimen, obtain the wave of oscillation voltage of amplitude far above the ultracapacitor charging voltage much larger than test specimen.The present invention compares the scale of construction with device in the past and greatly reduces, and makes tests such as operating wave impact at the scene become possibility; Loop passive (charge circuit breaks off after being full of) during in addition owing to pressurization does not exist power supply to disturb, and puts measurement so can carry out office simultaneously.
Appended drawings 1 is the circuit theory diagrams of the embodiment of the invention 1, and R represents the equivalent resistance in LC loop among the figure; Accompanying drawing 2 is the present invention produces wave of oscillation voltage on test specimen oscillograms.
Embodiment
Example 1 comprises charge power supply S, ultracapacitor C, inductor L, semiconductor switch K and capacitive divider C referring to a kind of wave of oscillation high pressure generator that is used for electrical test shown in the accompanying drawing 1
A, insert capacitive test specimen C
XAfter can carry out the withstand voltage and local discharge test of the wave of oscillation.Its principle of work is: charge power supply S charges to ultracapacitor C; Being full of the back waits for; The conducting semiconductor K switch lets ultracapacitor C discharge, inductor L excitation during pressurization, when discharge current reaches maximal value, turn-offs semiconductor switch K, and this moment, inductor L degaussing was test specimen C
XCharging, the result produces wave of oscillation high pressure above that.If ultracapacitor C value 500F, inductor L value 1H, LC loop equivalent resistance R value 20m Ω, test specimen C
XValue 0.2 μ F, calculating shows that wave of oscillation voltage maximum amplitude is 2MV.Capacitive divider C
AEffect in circuit is to be convenient to the sampling of trial voltage drawn game discharge signal.
Claims (1)
1. wave of oscillation high pressure generator is used in an electrical test; Comprise charge power supply, ultracapacitor, inductor, semiconductor switch and capacitive divider; But it is characterized in that utilizing ultracapacitor, inductor and semiconductor switch and test specimen to form two LC loop of the change of current; Ultracapacitor and inductor constitute the LC loop when being the semiconductor switch conducting, and inductor and test specimen constituted the LC loop when semiconductor switch turn-offed, and elder generation's energized is the ultracapacitor charging during work; The conducting semiconductor switch is by ultracapacitor discharge, inductor excitation then; When discharge current reaches maximal value, turn-off semiconductor switch, inductor degaussing this moment is the test specimen charging, and the result produces wave of oscillation high pressure above that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100503308A CN102650674A (en) | 2011-02-26 | 2011-02-26 | Oscillatory wave high voltage generator used for electrical test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100503308A CN102650674A (en) | 2011-02-26 | 2011-02-26 | Oscillatory wave high voltage generator used for electrical test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102650674A true CN102650674A (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100503308A Pending CN102650674A (en) | 2011-02-26 | 2011-02-26 | Oscillatory wave high voltage generator used for electrical test |
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| CN (1) | CN102650674A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439637A (en) * | 2013-08-14 | 2013-12-11 | 西安建筑科技大学 | Device and method for oscillatory wave generation in electrical device partial discharge test |
| CN103954810A (en) * | 2014-04-04 | 2014-07-30 | 南京信息工程大学 | 10/700 muS impulse voltage generator |
| CN106546870A (en) * | 2016-11-24 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of high-voltage and current-limitation fuse transient shock test device |
-
2011
- 2011-02-26 CN CN2011100503308A patent/CN102650674A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439637A (en) * | 2013-08-14 | 2013-12-11 | 西安建筑科技大学 | Device and method for oscillatory wave generation in electrical device partial discharge test |
| CN103439637B (en) * | 2013-08-14 | 2016-03-02 | 西安建筑科技大学 | A kind of wave of oscillation production method for local discharge of electrical equipment test |
| CN103954810A (en) * | 2014-04-04 | 2014-07-30 | 南京信息工程大学 | 10/700 muS impulse voltage generator |
| CN106546870A (en) * | 2016-11-24 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of high-voltage and current-limitation fuse transient shock test device |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120829 |