CN203968075U - Capacitive filter - Google Patents
Capacitive filter Download PDFInfo
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- CN203968075U CN203968075U CN201420405579.5U CN201420405579U CN203968075U CN 203968075 U CN203968075 U CN 203968075U CN 201420405579 U CN201420405579 U CN 201420405579U CN 203968075 U CN203968075 U CN 203968075U
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- capacitor
- inductance
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- diode
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Abstract
The utility model provides a kind of capacitive filter, comprise that inductance is to T1, diode VD, capacitor C and resistance R L, wherein, an inductance of described inductance centering connects input current, the input of one terminating diode VD of another inductance, one end of another termination capacitor C, the other end of the output termination capacitor C of diode VD, described resistance R L and capacitor C are arranged in parallel.Capacitive filter of the present utility model, can carry out good filtering to the Wen Bo in Unidirectional direct-current electricity, thereby obtains high-quality direct current output.
Description
Technical field
The utility model relates to filtering field, relates in particular to a kind of capacitive filter.
Background technology
The major function of filter circuit is that the civilian wave component in the Unidirectional direct-current electricity after rectification is filtered out as far as possible, makes it become level and smooth high-quality direct current.Filter circuit is comprised of energy-storage travelling wave tubes such as electric capacity, inductance conventionally.The utility model proposes a kind of capacitive filter, can carry out good filtering to the Wen Bo in Unidirectional direct-current electricity, thereby obtain high-quality direct current output.
Utility model content
In view of this, the utility model provides a kind of capacitive filter, comprise that inductance is to T1, diode VD, capacitor C and resistance R L, wherein, an inductance of described inductance centering connects input current, the input of a terminating diode VD of another inductance, one end of another termination capacitor C, the other end of the output termination capacitor C of diode VD, described resistance R L and capacitor C are arranged in parallel.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the capacitive filter that Fig. 1 provides for the utility model one embodiment.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is carried out to clear, complete description, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
The structural representation of the capacitive filter that Fig. 1 provides for the utility model one embodiment, as shown in Figure 1, the capacitive filter of the present embodiment, comprises that inductance is to T1, diode VD, capacitor C and resistance R L, wherein, an inductance of described inductance centering connects input current, the input of one terminating diode VD of another inductance, one end of another termination capacitor C, the other end of the output termination capacitor C of diode VD, described resistance R L and capacitor C are arranged in parallel.
The capacitive filter course of work of the present embodiment is:
At the positive half cycle of U2, if U2 is risen by 0V, rectifier diode VD conducting, Uo=U2, now power supply charges to capacitor C, because charge constant is very little, capacitor charging is very fast, so the rate of voltage rise on electric capacity can be caught up with the rate of climb of supply voltage completely, when U2 rises to peak value, capacitor charging voltage reaches
u2, rectifier diode VD cut-off.U2 declines subsequently, and capacitor C is discharged by load RL, and discharge time constant is RC, and its value is larger, so voltage drop speed is than slow many of U2 on electric capacity, now load voltage leans on the discharging current of capacitor C to maintain, i.e. Uo=Uc.When capacitor discharge is to a certain extent time, Uc=U2, rectifier diode VD conducting again, capacitor C is discharged again, charges to
after U2, electric discharge again.So repeat to discharge and recharge, after capacitor filtering, load voltage becomes steadily, and mean value has also improved.
Finally it should be noted that: above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement, and these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (1)
1. a capacitive filter, it is characterized in that, described filter comprises that inductance is to T1, diode VD, capacitor C and resistance R L, wherein, an inductance of described inductance centering connects input current, the input of a terminating diode VD of another inductance, one end of another termination capacitor C, the other end of the output termination capacitor C of diode VD, described resistance R L and capacitor C are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420405579.5U CN203968075U (en) | 2014-07-16 | 2014-07-16 | Capacitive filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420405579.5U CN203968075U (en) | 2014-07-16 | 2014-07-16 | Capacitive filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203968075U true CN203968075U (en) | 2014-11-26 |
Family
ID=51928615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420405579.5U Expired - Fee Related CN203968075U (en) | 2014-07-16 | 2014-07-16 | Capacitive filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203968075U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135245A (en) * | 2014-07-16 | 2014-11-05 | 奉化市宇创产品设计有限公司 | Capacitive filter |
-
2014
- 2014-07-16 CN CN201420405579.5U patent/CN203968075U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135245A (en) * | 2014-07-16 | 2014-11-05 | 奉化市宇创产品设计有限公司 | Capacitive filter |
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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 |
Granted publication date: 20141126 Termination date: 20150716 |
|
| EXPY | Termination of patent right or utility model |