CN202059193U - Capacitor discharging device - Google Patents
Capacitor discharging device Download PDFInfo
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- CN202059193U CN202059193U CN2011201503870U CN201120150387U CN202059193U CN 202059193 U CN202059193 U CN 202059193U CN 2011201503870 U CN2011201503870 U CN 2011201503870U CN 201120150387 U CN201120150387 U CN 201120150387U CN 202059193 U CN202059193 U CN 202059193U
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- residual voltage
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Abstract
The utility model relates to a capacitor discharging device which includes a discharging circuit, a rectifier circuit, and a residual voltage indicating module. The input terminal of the discharging circuit is connected with the capacitor, and the discharging circuit is used to discharge the residual voltage of the capacitor. The input terminal of the rectifier circuit is connected with the output terminal of the discharging circuit, and the rectifier circuit is used to provide the residual voltage outputted from the discharging circuit for the operation of the residual voltage indicating module. The input terminal of the residual voltage indicating module is connected with the output terminal of the rectifier circuit, and the residual voltage indicating module is used to indicate the voltage discharging process of the capacitor. The capacitor discharging device provided by the utility model enables a user to understand whether or not the residual voltage exists in the capacitor even the discharging device has a bad contact with the two ends of the capacitor, thus preventing the people from being injured and preventing a product from being damaged.
Description
Technical field
The utility model relates to electronic circuit field, relates in particular to a kind of capacitive discharge unit.
Background technology
Power supply product is in processes such as research and development, production, test; on running into because of electric capacity, regular meeting has residual voltage; when touching because of carelessness, human body shocked by electricity; or the power supply product solder side touches electric conductors such as metal object and the phenomenon damaged accidentally; when device interior has the big electric capacity of amounts of stored charge; even cut off the electricity supply, electric capacity and circuit thereof still need the discharge of long period, and personnel's contact still has the danger that gets an electric shock.For preventing the generation of this problem, make capacitive discharge unit exactly, if can not discharging in two seconds in the back of cutting off the electricity supply, the voltage of electric capacity and circuit thereof drops to below 30 volts, then electric discharge device must be set, the effect of capacitive discharge unit is exactly after the equipment of releasing is cut off the electricity supply, the electric charge of releasing and remaining in the electric capacity, usually the way that adopts is at the electric capacity two ends directly and connect discharge resistance and carry out residual voltage and release, its defective is for when electric discharge device and the loose contact of electric capacity two ends, may still have higher residual voltage exists, can't determine whether residual voltage releases totally, can't guarantee that human body preserves from, and product is not damaged.
The utility model content
Main purpose of the present utility model is to provide a kind of residual voltage clean capacitive discharge unit of whether releasing of determining.
In order to achieve the above object, the utility model proposes a kind of capacitive discharge unit, comprise discharge circuit, input is connected with described electric capacity, and the electric capacity residual voltage that is used to release is characterized in that, also comprises:
Rectification circuit, the output of the described discharge circuit of input termination is used for the residual voltage of discharge circuit output is offered the work of residual voltage indicating module;
The residual voltage indicating module, the output of input termination described rectification circuit is used to indicate the capacitance voltage process of releasing.
Preferential, described residual voltage indicating module specifically comprises:
LED indicating circuit, input connect described rectification circuit output end, change the described electric capacity of the indication process of releasing by LED brightness.
And/or warning circuit, input connects described rectification circuit output end, and the sound variation by alarm is confirmed the capacitance voltage process of releasing.
Preferential, described discharge circuit comprises the bleeder resistance of three parallel connections.
Preferential, described rectification circuit is the bridge rectifier of being made up of first diode, second diode, the 3rd diode and the 4th diode, wherein, one positive direct-current output is provided between first diode and the 3rd diode, a negative dc output end is provided between second diode and the 4th diode.
Preferential, described LED indicating circuit is composed in series by LED and current-limiting resistance, and current-limiting resistance one end is connected described positive direct-current output; the other end connects the positive pole of LED; the negative pole of LED is connected described negative dc output end, and current-limiting resistance is used to protect LED, and LED indicates the process of releasing by bright deepening.
Preferential, described warning circuit is made up of dc amplification circuit and buzzer, and described dc amplification circuit is used to drive buzzer warning.
Preferential; described direct-current discharge circuit is composed in parallel by protective resistance, metal-oxide half field effect transistor MOSFET and first resistance of connecting, second resistance of series connection; wherein; metal-oxide half field effect transistor MOSFET grid is connected electrically between first resistance and second resistance, and buzzer is connected electrically on metal-oxide half field effect transistor MOSFET drain electrode and the source electrode.
Preferential, described protective resistance is composed in parallel by three resistance.
The capacitive discharge unit that the utility model proposes, because except at the electric capacity two ends and connect bleeder resistance, also at the electric capacity two ends and connect LED indicating circuit and/or warning circuit, by LED indicating circuit and/or the warning circuit indication capacitance voltage process of releasing, confirm when voltage is released complete, even thereby electric discharge device and the loose contact of electric capacity two ends also make the user whether also have residual voltage by cheer and bright electric capacity, thereby avoid that human body comes to harm, product is damaged.
Description of drawings
Fig. 1 is the utility model capacitive discharge unit one example structure schematic diagram figure;
Fig. 2 is the utility model capacitive discharge unit one embodiment equivalent circuit diagram.
In order to make the technical solution of the utility model clearer, clear, be described in further detail below in conjunction with accompanying drawing.
Embodiment
The technical solution of the utility model is to propose a kind of capacitive discharge unit, by indicating the residual voltage process of releasing in electric capacity two ends to come to confirm whether residual voltage releases fully in that a residual voltage indicating circuit is set.
As shown in Figure 1, the utility model one embodiment proposes a kind of capacitive discharge unit, this device comprises discharge circuit 2, rectification circuit 3, LED indicating circuit 4, warning circuit 5, wherein, discharge circuit 2 is attempted by electric capacity 1 two ends, be used to discharge the residual voltage of electric capacity 1, rectification circuit 3 is attempted by electric capacity 1 two ends, be used for providing a direct current output to late-class circuit, LED indicating circuit 4 is attempted by described dc output end, brightness by LED changes the indication capacitance voltage process of releasing, warning circuit 5 is attempted by described dc output end, and the sound variation by alarm is confirmed the capacitance voltage process of releasing.
(more than, and connect electrical being connected in parallel of finger, and as: discharge circuit 2 is attempted by electric capacity 1 two ends, and rectification circuit 3 is attempted by electric capacity 1 two ends, and looking like is, discharge circuit 2 and rectification circuit 3 are connected electric capacity 1 two ends, discharge circuit 2 and rectification circuit 3 parallel connections, down together)
During work, discharge circuit 2 gives electric capacity 1 discharge, electric capacity 1 both end voltage from high to low, in the process of discharge voltage, after utilizing rectification circuit 3 to be converted to direct voltage, 4 direct current slowly diminishes in the LED indicating circuit, and the brightness of LED is by bright deepening, after releasing fully, LED extinguishes, and warning circuit 5 indication of also can sounding simultaneously is in the electric capacity 1 residual voltage process of releasing, warning circuit 5 also can be along with the variation on the process generation sound of releasing, sound is represented from large to small, and is from high to low, synchronous with the voltage process of releasing, after releasing fully, warning circuit 5 is no longer sounded.
Fig. 2 is the equivalent circuit diagram of the utility model embodiment, as shown in the figure, discharge circuit 2 comprises the bleeder resistance R0 of three parallel connections, R1, R2, be connected electric capacity 1 two ends, rectification circuit 3 is the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the rectifier that the first diode D1 forms, the second diode D2, the 3rd diode D3, the 4th diode D4 bridge-type is formed by connecting, and wherein the first diode D1 is relative with the 3rd diode D3 negative pole, and positive pole is connected to electric capacity 1 two ends, provide a positive direct-current output between the first diode D1 and the 3rd diode D3, the second diode D2 is anodal relative with the 4th diode D4, and negative pole is connected to electric capacity 1 two ends, provides a negative dc output end between the second diode D2 and the 4th diode D4.Rectification circuit 3 is by utilizing the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the unidirectional ducting capacity of the first diode D1, alternating current is converted to unidirectional direct current, being packaged together of four diode full-bridges in the rectification circuit 3 or half-bridge can be offered late-class circuit one direct current output
More than, discharge circuit 2 also can select different bleeder resistances to form with different connected modes according to electric capacity 1 and real work situation, and rectification circuit 3 also can be made up of other AC-DC rectifier system.
By the discharge that bleeder resistance R0, R1, R2 give, its both end voltage and is released gradually and is finished from high to low.LED D2 is by bright deepening, and extinguishes gradually, and buzzer 52 alarm sounds and fade away from high to low.Thereby can determine well that residual voltage is released totally on the electric capacity 1, guarantee that human body preserves from, product is not damaged.
Be connected to electrical connection between the electronic component of present embodiment indication, wherein, the concrete parameter of above electronic component is as follows:
Resistance R 0R1R2R3R4R8:3W/3K;
Diode D1-D4:1000V/1A;
Resistance R 7:3K 1/4W;
The first flows resistance R5:62K 1/8W;
The second flows resistance R6:5.1K 1/4W;
MOSFET?Q1：600V/10A。
Above parameter can differently according to the actual requirements change, and also can be 500V as MOSFET Q1, and above parameter comprises but do not limit its scope.
The capacitive discharge unit that the above embodiment of the utility model proposes, because except at electric capacity 1 two ends and meet bleeder resistance R0, R1, R2, also at electric capacity 1 two ends and connect LED indicating circuit 4 and warning circuit 5, by LED indicating circuit 4 and the warning circuit 5 indication capacitance voltages process of releasing, confirm under the dual prompting of LED light D5 brightness variation and buzzer 52 sound variation whether complete voltage releases, even thereby discharge circuit 1 and electric capacity 1 two ends loose contact, also make the user whether also have residual voltage by cheer and bright electric capacity 1, thereby avoid human body to come to harm, product is damaged.Owing to have dual residual voltage indicating circuit, also can reduce one of them indicating circuit and hinder the risk that to work and bring for some reason in addition, under double acknowledge, significantly reduce the probability of error, indication residual voltage that can the better and safer process of releasing.
The capacitive discharge unit that the utility model additional embodiments proposes also can and connect LED indicating circuit or warning circuit at the electric capacity two ends, by one of LED indicating circuit or warning circuit indication capacitance voltage process of releasing, confirms when voltage is released complete.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present utility model.
Claims (8)
1. a capacitive discharge unit comprises discharge circuit, and input is connected with described electric capacity, and the electric capacity residual voltage that is used to release is characterized in that, also comprises:
Rectification circuit, the output of the described discharge circuit of input termination is used for the residual voltage of discharge circuit output is offered the work of residual voltage indicating module;
Residual voltage is indicated electric module, and the output of input termination described rectification circuit is used to indicate the capacitance voltage process of releasing.
2. the described device of claim 1 is characterized in that, described residual voltage indicating module specifically comprises:
LED indicating circuit, input connect described rectification circuit output end, change the described electric capacity of the indication process of releasing by LED brightness;
And/or warning circuit, input connects described rectification circuit output end, and the sound variation by alarm is confirmed the capacitance voltage process of releasing.
3. device as claimed in claim 1 or 2 is characterized in that described discharge circuit comprises the bleeder resistance of three parallel connections.
4. device as claimed in claim 1 or 2, it is characterized in that, described rectification circuit is the bridge rectifier of being made up of first diode, second diode, the 3rd diode and the 4th diode, wherein, one positive direct-current output is provided between first diode and the 3rd diode, a negative dc output end is provided between second diode and the 4th diode.
5. device as claimed in claim 2; it is characterized in that; described LED indicating circuit is composed in series by LED and current-limiting resistance; current-limiting resistance one end is connected described positive direct-current output; the other end connects the positive pole of LED; the negative pole of LED is connected described negative dc output end, and current-limiting resistance is used to protect LED, and LED indicates the process of releasing by bright deepening.
6. as claim 2 or 5 described devices, it is characterized in that described warning circuit is made up of dc amplification circuit and buzzer, described dc amplification circuit is used to drive buzzer warning.
7. device as claimed in claim 6; it is characterized in that; described direct-current discharge circuit is composed in parallel by protective resistance, metal-oxide half field effect transistor MOSFET and first resistance of connecting, second resistance of series connection; wherein; metal-oxide half field effect transistor MOSFET grid is connected electrically between first resistance and second resistance, and buzzer is connected electrically on metal-oxide half field effect transistor MOSFET drain electrode and the source electrode.
8. device as claimed in claim 7 is characterized in that, described protective resistance is composed in parallel by three resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201503870U CN202059193U (en) | 2011-05-12 | 2011-05-12 | Capacitor discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201503870U CN202059193U (en) | 2011-05-12 | 2011-05-12 | Capacitor discharging device |
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| Publication Number | Publication Date |
|---|---|
| CN202059193U true CN202059193U (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201503870U Expired - Lifetime CN202059193U (en) | 2011-05-12 | 2011-05-12 | Capacitor discharging device |
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| CN (1) | CN202059193U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187861A (en) * | 2011-12-28 | 2013-07-03 | 立锜科技股份有限公司 | Self-discharge bleeder circuit, method, bleeder integrated circuit device and AC/DC interface |
| CN103312127A (en) * | 2013-06-21 | 2013-09-18 | 天津华宁电子有限公司 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
| CN105006956A (en) * | 2015-06-24 | 2015-10-28 | 珠海格力电器股份有限公司 | Rectifying and filtering circuit and electric appliance |
| CN106547301A (en) * | 2016-12-06 | 2017-03-29 | 杭州九阳小家电有限公司 | A kind of residual voltage method for releasing of cooking equipment |
-
2011
- 2011-05-12 CN CN2011201503870U patent/CN202059193U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187861A (en) * | 2011-12-28 | 2013-07-03 | 立锜科技股份有限公司 | Self-discharge bleeder circuit, method, bleeder integrated circuit device and AC/DC interface |
| CN103312127A (en) * | 2013-06-21 | 2013-09-18 | 天津华宁电子有限公司 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
| CN103312127B (en) * | 2013-06-21 | 2015-04-08 | 天津华宁电子有限公司 | Quick discharging and indicating device for explosion-proof frequency converter for mines |
| CN105006956A (en) * | 2015-06-24 | 2015-10-28 | 珠海格力电器股份有限公司 | Rectifying and filtering circuit and electric appliance |
| CN105006956B (en) * | 2015-06-24 | 2018-06-19 | 珠海格力电器股份有限公司 | Rectifying and filtering circuit and electric appliance |
| CN106547301A (en) * | 2016-12-06 | 2017-03-29 | 杭州九阳小家电有限公司 | A kind of residual voltage method for releasing of cooking equipment |
| CN106547301B (en) * | 2016-12-06 | 2019-09-27 | 杭州九阳小家电有限公司 | A kind of residual voltage method for releasing of cooking equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111130 |
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| CX01 | Expiry of patent term |