CN202083771U - Voltage withstand tester for electronic elements - Google Patents
Voltage withstand tester for electronic elements Download PDFInfo
- Publication number
- CN202083771U CN202083771U CN2011201932274U CN201120193227U CN202083771U CN 202083771 U CN202083771 U CN 202083771U CN 2011201932274 U CN2011201932274 U CN 2011201932274U CN 201120193227 U CN201120193227 U CN 201120193227U CN 202083771 U CN202083771 U CN 202083771U
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- CN
- China
- Prior art keywords
- electronic elements
- darlington transistor
- voltage withstand
- voltage
- resistance
- 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
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Abstract
The utility model belongs to electronic detection instruments, and particularly discloses a voltage withstand tester for electronic elements. The scheme includes that an output end of a bridge type rectifying filter circuit is connected with a constant current circuit consisting of a resistor, a Darlington pipe and a plurality of diodes, and a digital voltmeter and a milliammeter are disposed on the constant current circuit. Breakdown voltage of the elements is measured by means of adjusting a constant-current value of the constant current circuit. The voltage withstand tester cannot damage characteristics of devices when testing the electronic elements, and guarantees electric characteristics of the tested electronic elements.
Description
Technical field
The utility model relates to a kind of electronic component detecting instrument, refers more particularly to a kind of electronic component pressure-resistant tester.
Background technology
Voltage breakdown is one of most important parameter of electronic component, adopts pressure-resistant tester to measure usually.The principle of work of existing Hi-pot Tester is the reverse voltage that raises gradually by providing to electronic component, and when the electric current of the electronic component of flowing through arrived setting, at this moment the voltage at detected element two ends was the voltage breakdown of the element of surveying.Because the reverse voltage that provides is not easy fine setting control, in case when reverse voltage exceeds the withstand voltage of element, tested electronic component will be destroyed, therefore, there is certain risk in this pressure-resistant tester when testing for particular individual, be not suitable for the detection of valuable electron device.
The utility model content
For overcoming the prior art deficiency, the utility model provides a kind of electronic component pressure-resistant tester that can not cause damage to tested electronic component.
For realizing above-mentioned technical purpose, the utility model is achieved through the following technical solutions: a kind of electronic component pressure-resistant tester, comprise the bridge rectifier filter circuit that constitutes by transformer, rectifier bridge, electric capacity, the output terminal of bridge rectifier filter circuit connects the collector of Darlington transistor by digital voltmeter, milliammeter, also be connected with the base stage of Darlington transistor simultaneously by resistance R 1, the emitter of Darlington transistor is drawn the contact that connects detected element respectively by resistance R 2 ground connection on two positive negative terminals of digital voltmeter.
During test, when detected element oppositely being connected on the binding post of voltage table, measured device, Darlington transistor, resistance R 1, R2 constitute constant-current source circuit, by regulating the resistance of resistance R 2, make the reading of milliammeter equal the inverse current setting of measured device; The magnitude of voltage that this moment, voltage table showed is the voltage breakdown of measured device.Measured device inverse current setting can be found or provided by manufacturer by relevant criterion.
The utility model is compared with conventional art, has following beneficial effect: adopt the constant current source design, the measured device both end voltage is adjusted into voltage breakdown automatically, can not cause damage to device property, and is with low cost, safe and convenient to use, has wide range of applications.
Description of drawings
Accompanying drawing is the utility model circuit diagram.
Among the figure, D1D2D3, diode, R1R2, resistance, A1A2, contact, T1, Darlington transistor, C, electric capacity, T, transformer.
Embodiment
Referring to accompanying drawing, the bridge rectifier filter circuit that transformer T, rectifier bridge, capacitor C constitute, the output terminal of bridge rectifier filter circuit connects the collector of Darlington transistor T1 by digital voltmeter, milliammeter, also be connected simultaneously by the base stage of resistance R 1 with Darlington transistor T1, the emitter of Darlington transistor is by resistance R 2 ground connection, the base stage of Darlington transistor T1 is drawn the contact A1, the A2 that connect detected element respectively by diode in series D1, D2, D3 ground connection on two positive negative terminals of digital voltmeter.
Claims (1)
1. electronic component pressure-resistant tester, comprise the bridge rectifier filter circuit that constitutes by transformer, rectifier bridge, electric capacity, it is characterized in that: the output terminal of bridge rectifier filter circuit connects the collector of Darlington transistor by digital voltmeter, milliammeter, also be connected with the base stage of Darlington transistor simultaneously by resistance (R1), the emitter of Darlington transistor is drawn the contact that connects detected element respectively by resistance (R2) ground connection on two positive negative terminals of digital voltmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201932274U CN202083771U (en) | 2011-05-29 | 2011-05-29 | Voltage withstand tester for electronic elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201932274U CN202083771U (en) | 2011-05-29 | 2011-05-29 | Voltage withstand tester for electronic elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202083771U true CN202083771U (en) | 2011-12-21 |
Family
ID=45344396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201932274U Expired - Fee Related CN202083771U (en) | 2011-05-29 | 2011-05-29 | Voltage withstand tester for electronic elements |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202083771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207356A (en) * | 2012-11-22 | 2013-07-17 | 山东明华光电科技有限公司 | High-voltage lossless dielectric strength tester |
-
2011
- 2011-05-29 CN CN2011201932274U patent/CN202083771U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207356A (en) * | 2012-11-22 | 2013-07-17 | 山东明华光电科技有限公司 | High-voltage lossless dielectric strength tester |
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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: 20111221 Termination date: 20120529 |