CN2331976Y - Arrangement for measuring electrolytic condenser internal impedance - Google Patents
Arrangement for measuring electrolytic condenser internal impedance Download PDFInfo
- Publication number
- CN2331976Y CN2331976Y CN 98234460 CN98234460U CN2331976Y CN 2331976 Y CN2331976 Y CN 2331976Y CN 98234460 CN98234460 CN 98234460 CN 98234460 U CN98234460 U CN 98234460U CN 2331976 Y CN2331976 Y CN 2331976Y
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- Prior art keywords
- circuit
- electrolytic condenser
- utility
- model
- pulse amplitude
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- 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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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model relates to a device for measuring the inner resistance of electrolytic capacitors in circuits. The utility model is mainly composed of a pulse forming circuit, a pulse amplitude discrimination and timing circuit and a display. The utility model adopts a time base circuit IC and uses a differential circuit for discriminating the pulse amplitude of pulses formed by an electrolytic capacitor which is measured, and discriminating results are displayed through the display. The utility model has the advantages of simple structure, accurate measuring results, easy measuring methods, etc. The utility model can become a requisite tool for users and maintainers of electronic circuits.
Description
The utility model relates to electrolytic condenser internal resistance proving installation in a kind of circuit.
In many electronic circuits, as switching power circuit, the field-scanning circuit of televisor etc., the not normal phenomenon of work often appears, be to cause the internal resistance of electrolytic condenser caused above a certain threshold value by electrolytic condenser electrolytic solution wherein is dry, and this class capacitor can not be differentiated its quality with multimeter, because multimeter is tested it and is discharged and recharged and leak electricity, all there is not great difference with normal electrolytic condenser, this just makes service work walk many detours more, often all related elements of faulty circuit being split out inspection all can not pinpoint the problems, to one by one related elements be replaced, finally could find it is that electrolytic condenser causes, have only the impedance bridge of use to test, can find that they all have bigger loss tangent, i.e. equivalence has a bigger internal resistance and capacitor polyphone.Yet, for general maintenance personal, the impedance bridge of configuration rates costliness, it is unnecessary that accurate quantitative measurment is done in the internal resistance of electrolytic condenser, but it is just necessary promptly whether to make qualitative test above a certain threshold value to the internal resistance of electrolytic condenser.
The purpose of this utility model is to overcome above-mentioned weak point of the prior art, and a kind of fast qualitative test device of electrolytic condenser internal resistance is provided.
The utility model is achieved by the following scheme: utilize tested electrolytic condenser and resistance R
1Form differentiating circuit, capacitor C
1With resistance R
2Be timing circuit, time base circuit IC constitutes the pulse amplitude discriminator circuit, light emitting diode is a display, the input end of the output termination pulse amplitude discriminator circuit of differentiating circuit and timing circuit, the output termination display of pulse amplitude discriminator circuit, differentiate thereby pulse amplitude is carried out in the pulse shaping of tested electrolytic condenser, show.
The utlity model has simple in structurely, advantage that the test effect is accurate, measuring method is easy etc. is expected to become electronic circuit fan and maintenance personal's indispensable instrument.
Below in conjunction with accompanying drawing the utility model is described in further detail:
Accompanying drawing 1 is the utility model block scheme.
Accompanying drawing 2 is the utility model schematic circuit.
See accompanying drawing 1,2, the utility model is by differentiating circuit 1, timing circuit 2, pulse amplitude discriminator circuit 3, display 4 form tested electrolytic condenser C and resistance R thereof
1Be differentiating circuit 1, capacitor C
1With resistance R
2Be timing circuit 2, time base circuit IC is a pulse amplitude discriminator circuit 3, light emitting diode D
1As display 4, the resistance R that has three resistances to equate in the time base circuit IC is with supply voltage V
CcBe divided into
V
CcAnd
V
Cc. be connected to down "+" input end of comparer and " an output terminal of last comparer respectively.
When using the utility model, link to each other with tested electrolytic condenser C by test pencil or clip, trigger 3-3 is that reset mode is noble potential when vacant, makes field effect transistor Q conducting, the IC7 pin is an electronegative potential, capacitor C
1Do not charge, make IC3 pin output electronegative potential simultaneously, light emitting diode D
1Do not work IC
2Pin voltage is V
CcSo comparer 3-2 exports electronegative potential down, trigger 3-3Q is not triggered and works as K switch
1When connecting A, tested electrolytic condenser C and resistance R
1The differentiating circuit of forming produces a downward pulse, and the internal resistance Ri of good electrolytic condenser C is very little or be zero, and the pulse height that is produced is bigger, and IC2 pin current potential is reduced suddenly near zero volt, then is lower than
V
Cc, following comparer 3-2 output noble potential, trigger Q3-3 upset, Q is an electronegative potential, IC3 pin output noble potential, light emitting diode D
1Bright, simultaneously, the field effect transistor Q in the IC is become by conducting and ends capacitor C
1Pass through resistance
2Capacitor C is worked as in charging
1Voltage is charged to and surpasses
V
CcThe time, trigger 3-3 resets, IC3 pin output electronegative potential, light emitting diode D
1Extinguish light emitting diode D
1Glittering time length only with resistance R
2, capacitor C
1Time constant relevant, and irrelevant with the capacity of tested electrolytic condenser C, if the internal resistance Ri of tested electrolytic condenser C is during greater than a certain threshold value, formed pulse ogival voltage is higher than during test
V
CcNo matter the capacity of then tested electrolytic condenser C has much, also can not make circuit triggers, light emitting diode D
1Can be not glittering.
Because electrolytic condenser C is in circuit, the resistance of its bypass usually can be less than threshold resistance, so, in the process of testing circuit, can be directly on circuit board the electrolytic condenser C to all whole plates try at drive test, and do not need again tested electrolytic condenser to be split out one by one, remake test.
Claims (1)
- Electrolytic condenser internal resistance proving installation comprises differentiating circuit (1), timing circuit (2), and pulse amplitude discriminator circuit (3), display (4) is characterized in that: tested electrolytic condenser C and resistance R 1Form differentiating circuit (2), capacitor C 1With resistance R 2Form timing circuit (2), time base circuit IC constitutes pulse amplitude discriminator circuit (3), light emitting diode D is as display (4), the input end of the output termination pulse amplitude discriminator circuit (3) of differentiating circuit 1 and timing circuit (2), the output termination display (4) of pulse amplitude discriminator circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98234460 CN2331976Y (en) | 1998-06-17 | 1998-06-17 | Arrangement for measuring electrolytic condenser internal impedance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98234460 CN2331976Y (en) | 1998-06-17 | 1998-06-17 | Arrangement for measuring electrolytic condenser internal impedance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2331976Y true CN2331976Y (en) | 1999-08-04 |
Family
ID=33982973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98234460 Expired - Fee Related CN2331976Y (en) | 1998-06-17 | 1998-06-17 | Arrangement for measuring electrolytic condenser internal impedance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2331976Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699810A (en) * | 2016-02-29 | 2016-06-22 | 珠海格力电器股份有限公司 | Electrolytic capacitor on-line test device and method |
-
1998
- 1998-06-17 CN CN 98234460 patent/CN2331976Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699810A (en) * | 2016-02-29 | 2016-06-22 | 珠海格力电器股份有限公司 | Electrolytic capacitor on-line test device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Weiquan Document name: payment instructions |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |