CN201955418U - Discharge device of capacitor leakage tester - Google Patents
Discharge device of capacitor leakage tester Download PDFInfo
- Publication number
- CN201955418U CN201955418U CN 201020676643 CN201020676643U CN201955418U CN 201955418 U CN201955418 U CN 201955418U CN 201020676643 CN201020676643 CN 201020676643 CN 201020676643 U CN201020676643 U CN 201020676643U CN 201955418 U CN201955418 U CN 201955418U
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- discharge
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- discharge circuit
- measured capacitance
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- 239000003990 capacitor Substances 0.000 title abstract description 6
- 238000007599 discharging Methods 0.000 abstract 1
- 101100326920 Caenorhabditis elegans ctl-1 gene Proteins 0.000 description 3
- 101100494773 Caenorhabditis elegans ctl-2 gene Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model provides a discharge device of a capacitor leakage tester, which adopts electronic discharge and mechanical discharge sequentially. No instantaneous high voltage or high current can be generated in the initial phase of discharge, and mechanical jittering or high-voltage and high-current arc can be avoided. The discharge device comprises a discharge selection switch controlled by a microprocessor, an electronic discharge circuit, a mechanical discharge circuit, a voltage comparator and a capacitor to be tested, and the two ends of the capacitor to be tested are connected with the electronic discharge circuit and the mechanical discharge circuit. By adopting the device, halting, resetting and the like caused by interference to digital control systems of various instruments during capacitor discharging can be avoided.
Description
Technical field
This novel a kind of capacitance measuring tester, electric discharge device of particularly a kind of capacity fall off tester of relating to.
Background technology
In various electronics and mechanical industry, various products all contain capacity cell, as when carrying out the test of some operation test case such as electric capacity, need test the electric leakage of electric capacity.The detection of general capacity fall off tester comprises three phases: measured capacitance is charged, the electric leakage of measured capacitance is tested, measured capacitance is discharged.For discharge regime, capacity fall off tester in the past all is to discharge with mechanical switch, and the defective of this circuit is to utilize the mechanical switch discharge fully, can produce instant high-voltage and big electric current in the discharge starting stage, thereby cause the arcing phenomenon of mechanical shaking and high-voltage great-current, when electric capacity has big voltage, the discharge meeting causes very big interference to the digital control system of various instruments, cause deadlock, reset, even more serious consequence, for the digital implementation of accurate measurement or control, the perhaps instrument of demand continuous working, this consequence is very unfavorable to the corresponding work process.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of safe electric discharge device to high voltage electric capacity, and instant high-voltage that its starting stage that can prevent to discharge produces and big electric current cause the arcing phenomenon of mechanical shaking and high-voltage great-current.
The electric discharge device of a kind of capacity fall off tester described in the utility model, comprise discharge selector switch, electron discharge circuit, mechanical discharge circuit, voltage comparator and the measured capacitance of microprocessor control, the two ends of described measured capacitance are connected to described electron discharge circuit and mechanical discharge circuit; The output terminal of described voltage comparator connects microprocessor, and each connects the end of oppisite phase of voltage comparator the two ends of measured capacitance through a resistance.
Described electron discharge circuit comprises high-power FET, high-power resistance, diode, the first discharge signal control end and a resistance, described discharge signal output terminal is connected to the grid of described high-power FET through described resistance, the positive voltage terminal of described measured capacitance is connected to the drain electrode of high-power FET successively through described diode, high-power resistance, the source ground of high-power FET, the anode of described diode connect an end of electric capacity.
Described mechanical discharge circuit comprises relay, second discharge signal control end and the discharge switch, described discharge switch comprises a triode, the collector connection relay of triode, grounded emitter, the second discharge signal control end connects the base stage of triode, and the fixed contact of described relay is connected measured capacitance with a moving contact.
The beneficial effects of the utility model are: utilize the electronic switch discharge, can not produce instant high-voltage and big electric current in the discharge starting stage, stop the arcing phenomenon of mechanical shaking and high-voltage great-current to take place, do not disturb the digital control system of various instruments and cause deadlock, consequence such as reset, and carry out carrying out the machinery discharge again behind the electron discharge, can reach the purpose of thorough discharge.
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
Description of drawings
Fig. 1 is the circuit theory diagrams that the utility model carries out electron discharge;
Fig. 2 is the circuit theory diagrams that the utility model carries out the machinery discharge.
Embodiment
Referring to Fig. 1 and Fig. 2, the electric discharge device of a kind of capacity fall off tester described in the utility model, comprise discharge selecting side CTL_1 and CTL_2, electron discharge circuit, mechanical discharge circuit, voltage comparator U1-A and the measured capacitance Cx of microprocessor control, the two ends of described measured capacitance Cx are connected to described electron discharge circuit and mechanical discharge circuit; The output terminal 1 of voltage comparator U1-A connects microprocessor, and in-phase end 3 connects a reference voltage end VREF, and each connects the end of oppisite phase 2 of voltage comparator the two ends of measured capacitance Cx through a resistance R 3, R5.
Described electron discharge circuit comprises high-power FET Q10 and Q11, high-power resistance R1 and R2, diode D1 and D2, the first discharge signal control end CTL_1 and a resistance R 4, the described first discharge signal control end CTL_1 is connected to the grid of described high-power FET Q10 and Q11 through resistance R 4, the positive voltage terminal of described measured capacitance Cx is connected to the drain electrode of Q10 and Q11 successively through described diode D1 and D2, high-power resistance R1 and R2, the source ground of Q10 and Q11, the anode of described diode D1 and D2 connects the end of nearly capacitor C x.
Described mechanical discharge circuit comprises relay K 1, second discharge signal control end CTL_2 and the discharge switch, described discharge switch comprises a triode Q1, the collector connection relay K1 of Q1, grounded emitter, the second discharge signal control end CTL_2 connects the base stage of triode Q1, and the fixed contact 3 of described relay K 1 is connected measured capacitance Cx with a moving contact 5.
Above utility model is described only to be most preferred embodiment of the present utility model; not in order to restriction the utility model; all modification, replacement or improvement of on the utility model basis, being done; as change the component type in the discharge switch and realize identical break-make effect, all fall in the protection domain of the present utility model.
Claims (4)
1. the electric discharge device of a capacity fall off tester, it is characterized in that, comprise discharge selector switch, electron discharge circuit, mechanical discharge circuit and the measured capacitance of microprocessor control, the two ends of described measured capacitance are connected to described electron discharge circuit and mechanical discharge circuit.
2. the electric discharge device of a kind of capacity fall off tester according to claim 1, it is characterized in that, also comprise a voltage comparator, the output terminal of described voltage comparator connects microprocessor, and each connects the end of oppisite phase of voltage comparator the two ends of measured capacitance through a resistance.
3. the electric discharge device of a kind of capacity fall off tester according to claim 1, it is characterized in that, described electron discharge circuit comprises high-power FET, high-power resistance, diode, the first discharge signal control end and a resistance, described discharge signal output terminal is connected to the grid of described high-power FET through described resistance, the positive voltage terminal of described measured capacitance is connected to the drain electrode of described high-power FET successively through described diode, high-power resistance, the source ground of high-power FET, the anode of described diode connect an end of electric capacity.
4. the electric discharge device of a kind of capacity fall off tester according to claim 1, it is characterized in that, described mechanical discharge circuit comprises relay, second discharge signal control end and the discharge switch, described discharge switch comprises a triode, the collector connection relay of triode, grounded emitter, the second discharge signal control end connects the base stage of triode, and the fixed contact of described relay is connected measured capacitance with a moving contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020676643 CN201955418U (en) | 2010-12-23 | 2010-12-23 | Discharge device of capacitor leakage tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020676643 CN201955418U (en) | 2010-12-23 | 2010-12-23 | Discharge device of capacitor leakage tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955418U true CN201955418U (en) | 2011-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020676643 Expired - Lifetime CN201955418U (en) | 2010-12-23 | 2010-12-23 | Discharge device of capacitor leakage tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201955418U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519544A (en) * | 2018-04-08 | 2018-09-11 | 国网江苏省电力有限公司苏州供电分公司 | Pressure-resistant test system and test method between a kind of DC voltage support capacitor terminal |
-
2010
- 2010-12-23 CN CN 201020676643 patent/CN201955418U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519544A (en) * | 2018-04-08 | 2018-09-11 | 国网江苏省电力有限公司苏州供电分公司 | Pressure-resistant test system and test method between a kind of DC voltage support capacitor terminal |
| CN108519544B (en) * | 2018-04-08 | 2023-10-20 | 国网江苏省电力有限公司苏州供电分公司 | Withstand voltage test system and test method between terminals of direct-current voltage supporting capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 523808, No. 6, industrial North Road, Songshan hi tech Industrial Development Zone, Guangdong, Dongguan Patentee after: Uni-Trend Technology (China) Co., Ltd. Address before: 523925, Humen Town, Guangdong, Dongguan Patentee before: Uni-Trend Technology (China) Co., Ltd. |
|
| CP03 | Change of name, title or address |
Address after: 523808 No. 6 industrial North Road, Songshan Lake high tech Industrial Development Zone, Dongguan, Guangdong Patentee after: Uno Technology (China) Limited by Share Ltd Address before: 523808 No. 6 industrial North Road, Songshan Lake high tech Industrial Development Zone, Dongguan, Guangdong Patentee before: Uni-Trend Technology (China) Co., Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |
|
| CX01 | Expiry of patent term |