CN202424151U - Circuit with safely-discharged capacitor - Google Patents
Circuit with safely-discharged capacitor Download PDFInfo
- Publication number
- CN202424151U CN202424151U CN2012200182932U CN201220018293U CN202424151U CN 202424151 U CN202424151 U CN 202424151U CN 2012200182932 U CN2012200182932 U CN 2012200182932U CN 201220018293 U CN201220018293 U CN 201220018293U CN 202424151 U CN202424151 U CN 202424151U
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- discharge
- circuit
- capacitor
- discharged
- power resistor
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Abstract
The utility model discloses a circuit with a safely-discharged capacitor. The circuit is simple in structure and reasonable in design and comprises a detection circuit and a plurality of power resistors which are connected in parallel and are used for consuming the released electric quantity with a discharged capacitor, wherein the detection circuit comprises a current limiting resistor and a light-emitting diode connected with the current limiting resistor in series, the detection circuit and the power resistors are connected in parallel, one end of the power resistors is provided with a first discharge end connected with a capacitor to be discharged, and the other end of the power resistors is provided with a second discharge end connected with the capacitor to be discharged. The circuit with the safely-discharged capacitor provided by the utility model is low in cost, can discharge directing at an electrolytic capacitor with large capacity required to be discharged, and can judge if the electric quantity is fully released through the detection circuit, thus avoiding harm to the human body.
Description
Technical field
The utility model relates to the power circuit application, particularly a kind of jumbo electrochemical capacitor safe discharge circuit.
Background technology
Use jumbo electrochemical capacitor energy-storage travelling wave tube to many power supplys; Power supply product some electric capacity in processes such as research and development, production, test and maintenance also has certain electric weight; Because the capacitance of this capacity is big; The electric current that the moment conducting is discharged is very big, just keeps in repair etc. like incomplete release electric weight wherein and is easy to cause electric shock, and perhaps other components and parts are shocked by electricity and damage.
In order to discharge electric weight wherein, the mode of the employing direct short-circuit that part maintenance personal or experimenter have is used metal object; Like screwdriver; Dock two pins of this electric capacity simply, so that capacitance short-circuit reaches the purpose that discharges electric weight, this simple charging method causes immediate current very big; So not only possibly injury arranged, and very easily cause the electric capacity internal damage personal safety.The form of the employing lamp bulb that has, if under the high situation of capacitances in series voltage, bulb possibly have certain influence to people's safety because overtension explode.
Some manufacturer makes capacitive discharge unit; Discharge the electric charge that remains in the electric capacity; Usually the way that adopts is exactly at the electric capacity two ends directly and connect discharge resistance and carry out residual voltage and discharge; Its defective is to confirm whether residual voltage discharges totally, and personnel's contact still has the danger that gets an electric shock, and certain danger is arranged.
The utility model content
The purpose of the utility model is the shortcoming that overcomes prior art, and a kind of electric capacity safe discharge circuit is provided, and circuit is simple, and is easy to operate, avoids human body to come to harm and damage of product.
For reaching above-mentioned purpose; A kind of electric capacity safe discharge circuit that the utility model provides; Technical scheme below adopting: the described discharge circuit of the utility model comprises that testing circuit and plural number are used to consume the power resistor that belt discharge electric capacity discharges electric weight, and said power resistor is connected in parallel; The light-emitting diode that said testing circuit comprises current-limiting resistance and connects with said current-limiting resistance, said testing circuit and power resistor are connected in parallel.
Further, said power resistor one end is provided with and first discharge end of treating that discharge capacity is connected, and the other end of said power resistor is provided with and second discharge end of treating that discharge capacity is connected.
Further, said current-limiting resistance one end connects said first discharge end, and the said current resistor other end connects the anode of light-emitting diode, and the negative electrode of said light-emitting diode connects said second discharge end.
The beneficial effect of the utility model is: the utility model circuit is simple; Reasonable in design, cost is low, discharges to the jumbo electrochemical capacitor of the discharge of needs; And judge through said testing circuit whether electric weight discharges fully, thereby avoid human body to come to harm.It solves jumbo electric capacity very easily causes the electric capacity internal damage when discharge problem; The electric weight that electric capacity discharges is by power resistor consumption; Can not cause the excessive problem of the electric current that sparks, also can know that whether observation electric capacity also exists residual voltage, avoids damage of product.
Description of drawings
Shown in Figure 1 is the utility model discharge circuit sketch map.
It below is the explanation of the utility model parts sign flag.
Embodiment
For further understanding characteristic, technological means and the specific purposes that reached, the function of the utility model; Resolve the advantage and spirit of the utility model, by the detailed description of the utility model further being understood below in conjunction with accompanying drawing and embodiment.
Shown in Figure of description, the described discharge circuit of the utility model comprises testing circuit and is used to consume power resistor RW1, RW2, the RW3 that belt discharge electric capacity discharges electric weight, said power resistor RW1, and RW2, RW3 is connected in parallel.The light-emitting diode D10 that said testing circuit comprises current-limiting resistance R1 and connects with said current-limiting resistance, said testing circuit R1 and D10 and power resistor RW1, RW2, RW3 is connected in parallel.Said current-limiting resistance R1 is used to protect light-emitting diode D10, said light-emitting diode D10 by bright deepening in order to indication electric capacity electric weight dispose procedure.
Said power resistor one end is provided with and the first discharge end CAP+ that treats that discharge capacity is connected, and the other end of said power resistor is provided with and the second discharge end CAP-that treats that discharge capacity is connected.Said current-limiting resistance R1 one end connects the said first discharge end CAP+, and the said current resistor R1 other end connects the anode of light-emitting diode D10, and the negative electrode of said light-emitting diode D10 connects the said second discharge end CAP-.
In use, said power resistor and testing circuit and electric capacity are connected in parallel, and said first discharge end connects the positive pole of electric capacity, and said second discharge end connects the negative pole of electric capacity.During work, said power resistor is given capacitor discharge, and the voltage at electric capacity two ends from high to low; In the process of release voltage, the electric current of the light-emitting diode in the said testing circuit slowly diminishes, and the brightness of light-emitting diode is by bright deepening; After discharging fully, light-emitting diode extinguishes.
Be connected to electric connection between the electronic component of present embodiment indication, wherein, the concrete parameter of above electronic component is following:
Power resistor RW1, RW2, RW3: resistance is 1K;
Current-limiting resistance R1: resistance is 510K;
Above parameter difference according to the actual requirements changes and changes, and above parameter comprises but just do not limit its scope.Can increase or reduce the quantity of the power resistor of parallel connection during use according to the situation of real work, if the resistance of power resistor is too little, then discharging current moment bigger, cause arcing, phenomenons such as sparking; If the resistance of power resistor is too big, then capacitor discharge time is longer.
In sum, the utility model circuit is simple, and is reasonable in design; Cost is low, capacitor discharge safety, and the electric weight that electric capacity discharges is by power resistor consumption; Can not cause the excessive problem of the electric current that sparks; And judge through said testing circuit whether electric weight discharges fully, thereby avoid human body to come to harm, avoid damage of product.
The above embodiment has only expressed the part execution mode of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model scope.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection range of the utility model.Therefore, the protection range of the utility model should be as the criterion with accompanying claims.
Claims (3)
1. electric capacity safe discharge circuit is characterized in that: said discharge circuit comprises that testing circuit and plural number are used to consume the power resistor that belt discharge electric capacity discharges electric weight, and said power resistor is connected in parallel; The light-emitting diode that said testing circuit comprises current-limiting resistance and connects with said current-limiting resistance, said testing circuit and power resistor are connected in parallel.
2. a kind of electric capacity safe discharge circuit according to claim 1 is characterized in that: said power resistor one end is provided with and first discharge end of treating that discharge capacity is connected, and the other end of said power resistor is provided with and second discharge end of treating that discharge capacity is connected.
3. a kind of electric capacity safe discharge circuit according to claim 1; It is characterized in that: said current-limiting resistance one end connects said first discharge end; The said current resistor other end connects the anode of light-emitting diode, and the negative electrode of said light-emitting diode connects said second discharge end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200182932U CN202424151U (en) | 2012-01-16 | 2012-01-16 | Circuit with safely-discharged capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200182932U CN202424151U (en) | 2012-01-16 | 2012-01-16 | Circuit with safely-discharged capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202424151U true CN202424151U (en) | 2012-09-05 |
Family
ID=46748876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200182932U Expired - Fee Related CN202424151U (en) | 2012-01-16 | 2012-01-16 | Circuit with safely-discharged capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202424151U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393746A (en) * | 2014-11-17 | 2015-03-04 | 广东易事特电源股份有限公司 | BUS capacitive discharge circuit, discharge method and UPS provided with discharge circuit |
| CN110429898A (en) * | 2019-08-15 | 2019-11-08 | 海信（山东）空调有限公司 | A kind of control method of frequency conversion equipment, device and frequency conversion equipment |
| CN110768224A (en) * | 2018-07-27 | 2020-02-07 | 湖南中车时代电动汽车股份有限公司 | Safe discharge device and discharge system |
-
2012
- 2012-01-16 CN CN2012200182932U patent/CN202424151U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393746A (en) * | 2014-11-17 | 2015-03-04 | 广东易事特电源股份有限公司 | BUS capacitive discharge circuit, discharge method and UPS provided with discharge circuit |
| CN110768224A (en) * | 2018-07-27 | 2020-02-07 | 湖南中车时代电动汽车股份有限公司 | Safe discharge device and discharge system |
| CN110768224B (en) * | 2018-07-27 | 2022-03-15 | 湖南中车时代电动汽车股份有限公司 | Safe discharge device and discharge system |
| CN110429898A (en) * | 2019-08-15 | 2019-11-08 | 海信（山东）空调有限公司 | A kind of control method of frequency conversion equipment, device and frequency conversion equipment |
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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: 20120905 Termination date: 20170116 |