CN105742063A - Rectifier filter with high thermal dissipation - Google Patents
Rectifier filter with high thermal dissipation Download PDFInfo
- Publication number
- CN105742063A CN105742063A CN201610195111.1A CN201610195111A CN105742063A CN 105742063 A CN105742063 A CN 105742063A CN 201610195111 A CN201610195111 A CN 201610195111A CN 105742063 A CN105742063 A CN 105742063A
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- CN
- China
- Prior art keywords
- electrode set
- filter
- negative electrode
- anode electrode
- insulation sleeve
- Prior art date
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0003—Protection against electric or thermal overload; cooling arrangements; means for avoiding the formation of cathode films
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/15—Solid electrolytic capacitors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
Abstract
The invention discloses a rectifier filter with high thermal dissipation. The rectifier filter comprises two rectifier diodes, two filter capacitors and a bleeder resistor, wherein the two series-wound rectifier diodes are connected with the two series-wound filter capacitors in parallel; the bleeder resistor is connected at the two ends of the two series-wound filter capacitors in parallel, wherein the filter capacitors are tantalum electrolytic capacitors; the shells of the filter capacitors comprise positive electrode sleeves and negative electrode sleeves arranged at the two ends, and insulating sleeves; the filter capacitors are placed on a PCB and welded to the PCB through the positive electrode sleeves and the negative electrode sleeves, so that the height of the filter capacitors can be lowered, the electronic parts and components are more compacted, and the volume of the rectifier filter is reduced; the space between the capacitor cores and the cavities in the shells are filled with a thermal conducting insulating epoxy resin, so that the heat in the capacitors can be rapidly conducted outwards; the insulating sleeves are thermal conducting insulating sleeves, and radiating ripples are arranged on the outer surfaces of the positive electrode sleeves and the negative electrode sleeves, so that the radiating areas can be enlarged, and rapid thermal dissipation can be realized; and therefore, the thermal dissipation of the rectifier filter can be accelerated.
Description
Technical field
The present invention relates to arrangement filter circuit field, particularly to the rectifier filter that a kind of thermal diffusivity is good.
Background technology
LED drive circuit is it is necessary to have input rectifying wave filter and output rectification filter device.Input rectifying wave filter needs relatively large capacitance rectifier output voltage could be smoothed to allowed band.Output rectification filter device is also required to enough capacitances and comes the stability of holding circuit and the smooth of output electric current.Current rectifying and wave filtering circuit all contains electric capacity, and the maximum weakness of electrolysis condenser is that the life-span is short, and unstable properties.And what electric capacity connected generally by the pin drawn, such electric capacity is installed on circuit boards, and it highly determines the height of circuit board, causes the excessive height of circuit board.
Summary of the invention
The main purpose of the present invention is to provide the rectifier filter that a kind of stable performance, long service life and thermal diffusivity are good.
The present invention proposes the rectifier filter that a kind of thermal diffusivity is good, described rectifier filter includes pcb board and the full-wave voltage doubler being made up of two commutation diodes, two filter capacitors and a bleeder resistance being arranged on pcb board, filter capacitor series connection described in two, commutation diode series connection described in two, described in the two of series connection, commutation diode is in parallel with filter capacitor described in connect two, described bleeder resistance be connected in parallel on series connection two described in the two ends of filter capacitor, constitute a full-wave voltage doubler；
Described filter capacitor includes shell and the capacitor element being placed in described shell, described capacitor element includes capacitor core, negative wire and positive wire, described shell is by the anode electrode set being placed in two ends, negative electrode set and the insulation sleeve being connected between described anode electrode set and described negative electrode set are constituted, described insulation sleeve and described anode electrode set, connected by snap between described negative electrode set, it is provided with draw-in groove at the two ends of described insulation sleeve internal face, it is provided with the snap fit corresponding with described draw-in groove with one end that described insulation sleeve is connected what described anode electrode set overlapped with described negative electrode, buckle in corresponding described draw-in groove by described snap fit, make described anode electrode set, negative electrode set is interconnected to form shell with described insulation sleeve；Described insulation sleeve is heat conductive insulating set, is provided with radiatinig corrugated on the outer surface of described anode electrode set and described negative electrode set；Heat conductive insulating epoxy resin it is filled with between described capacitor core and described shell inner cavity；
Described capacitor core includes by the porous tantalum powder sintering block positive electrode substrate of high temperature sintering after tantalum metal powder briquet, the surface of described tantalum powder sintering block positive electrode substrate is formed with TaO5 film through anodic oxidation, negative pole end in described tantalum powder sintering block positive electrode substrate forms solid electrolyte MnO2 layer by impregnating manganese nitrate then through high temperature sintering, described solid electrolyte MnO2 layer is coated with negative pole graphite linings, described negative pole graphite linings is coated with terne metal conductive layer, described positive wire extend out in described tantalum powder sintering block positive electrode substrate and contacts with described anode electrode set, described negative wire extend out to from described solid electrolyte MnO2 layer and contacts with described negative electrode set；Described filter capacitor lies on described pcb board, and described anode electrode set and described negative electrode set are welded on described pcb board.
Preferably, described negative wire is copper wire, and described positive wire is nickel wire.
Current rectifying and wave filtering circuit in the rectifier filter of the present invention is full-wave voltage doubler, for the alternating voltage of input is carried out rectification, filtering, obtains a smooth DC voltage；Bleeder resistance in parallel is for providing a path of releasing to filter capacitor, in order to after filter capacitor quits work, the electric energy of its two ends storage of releasing, and uses safer.
After the tantalum powder briquet that filter capacitor employing granule is very thin, high temperature sintering becomes the tantalum powder sintering block positive electrode substrate of porous, and the effective area in monomer whose is long-pending is big, uses temperature range width；The surface of tantalum powder sintering block positive electrode substrate is formed with TaO5 film through anodic oxidation, and the dielectric constant of TaO5 film is bigger than the dielectric constant of alumite；Negative pole end in tantalum powder sintering block positive electrode substrate forms solid electrolyte MnO2 layer by impregnating manganese nitrate then through high temperature sintering, is coated with negative pole graphite linings, is coated with terne metal conductive layer in negative pole graphite linings on solid electrolyte MnO2 layer；Therefore when identical pressure and capacitance, the small volume of filter capacitor, can reduce the volume of rectifier filter, and stable performance, work long hours the electrical property remaining to keep good, can extend the service life of rectifier filter.
The shell of filter capacitor is made up of the anode electrode set being placed in two ends, negative electrode set and the insulation sleeve being connected between anode electrode set and negative electrode set, it is connected by snap between insulation sleeve with anode electrode set, negative electrode set, it is provided with draw-in groove at the two ends of insulation sleeve internal face, the one end being connected with insulation sleeve overlapped with negative electrode at anode electrode set is provided with the snap fit corresponding with draw-in groove, buckle in corresponding draw-in groove by snap fit, anode electrode set, negative electrode set is made to be interconnected to form shell with insulation sleeve, simple in construction, easy to assembly.
Filter capacitor lies on pcb board, and anode electrode set and negative electrode set are welded on pcb board, can reduce the height of filter capacitor, also make between electronic devices and components compacter, reduce the volume of rectifier filter.
Between capacitor core and shell inner cavity, it is filled with heat conductive insulating epoxy resin, the heat of capacitor internal can be conducted rapidly；Insulation sleeve is heat conductive insulating set, is provided with radiatinig corrugated, can increase area of dissipation, to reach the effect of quick heat radiating on the outer surface of anode electrode set and negative electrode set；It is thus possible to accelerate the heat radiation of rectifier filter.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the rectifier filter that the thermal diffusivity of the present invention is good；
Fig. 2 is the sectional view of the filter capacitor in the rectifier filter that the thermal diffusivity of the present invention is good.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Referring to figs. 1 through Fig. 2, it is proposed to an embodiment of the rectifier filter that the thermal diffusivity of the present invention is good:
This rectifier filter includes pcb board and the full-wave voltage doubler being made up of two commutation diodes, two filter capacitors and a bleeder resistance being arranged on pcb board, two filter capacitor C1, C2 series connection, two commutation diode D1, D2 series connection, two commutation diode D1, D2 of series connection are in parallel with two filter capacitor C1, the C2 connected, bleeder resistance R is connected in parallel on the two ends of two filter capacitor C1, C2 of series connection., constitute a full-wave voltage doubler.Bleeder resistance R is for providing a path of releasing to filter capacitor C1, C2, in order to after filter capacitor C1, C2 quit work, the electric energy of its two ends storage of releasing.During circuit work, two commutation diode Dl, D2 and two electric capacity C1, C2 composition full-wave voltage doubler the alternating voltage inputted is carried out rectification, filtering, obtain a smooth DC voltage and export.
Filter capacitor C2, C3 include shell and the capacitor element being placed in shell, and capacitor element includes capacitor core, negative wire and positive wire.Shell is made up of the anode electrode set 11 being placed in two ends, negative electrode set 12 and the insulation sleeve 13 being connected between anode electrode set 11 and negative electrode set 12, is connected by snap between insulation sleeve 13 with anode electrode set 11, negative electrode set 12.It is provided with draw-in groove at the two ends of insulation sleeve 13 internal face, anode electrode overlap 11 with negative electrode overlap 12 be provided with the snap fit 14 corresponding with draw-in groove with one end that insulation sleeve 13 is connected, buckle in corresponding draw-in groove by snap fit 14, anode electrode set 11, negative electrode set 12 is made to be interconnected to form shell with insulation sleeve 13, simple in construction, easy to assembly.
Between capacitor core and shell inner cavity, it is filled with heat conductive insulating epoxy resin 30, the heat of capacitor internal can be conducted rapidly.Insulation sleeve 13 is heat conductive insulating set, is provided with radiatinig corrugated, can increase area of dissipation, to reach the effect of quick heat radiating on the outer surface that anode electrode overlaps 11 and negative electrode set 12；It is thus possible to accelerate the heat radiation of rectifier filter.
Capacitor core includes by the porous tantalum powder sintering block positive electrode substrate 21 of high temperature sintering after tantalum metal powder briquet, and the effective area in monomer whose is long-pending is big, uses temperature range width.The dielectric constant that the surface of tantalum powder sintering block positive electrode substrate 21 is formed with TaO5 film 22, TaO5 film 22 through anodic oxidation is bigger than the dielectric constant of alumite.Negative pole end in tantalum powder sintering block positive electrode substrate 21 forms solid electrolyte MnO2 layer 23 by impregnating manganese nitrate then through high temperature sintering, is coated with negative pole graphite linings 24, is coated with terne metal conductive layer 25 in negative pole graphite linings 24 on solid electrolyte MnO2 layer 23.Negative wire is copper wire, and positive wire is nickel wire.Positive wire extend out in tantalum powder sintering block positive electrode substrate 21 and contacts with anode electrode set 11, and negative wire extend out to from solid electrolyte MnO2 layer 23 and contacts with negative electrode set 12.
Filter capacitor C1, C2 lie on pcb board, and anode electrode set 11 and negative electrode set 12 are welded on pcb board, can reduce the height of filter capacitor, also make between electronic devices and components compacter, reduce the volume of rectifier filter.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing description of the present invention and accompanying drawing content to make; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (2)
1. the rectifier filter that a thermal diffusivity is good, it is characterized in that, described rectifier filter includes pcb board and the full-wave voltage doubler being made up of two commutation diodes, two filter capacitors and a bleeder resistance being arranged on pcb board, filter capacitor series connection described in two, commutation diode series connection described in two, described in the two of series connection, commutation diode is in parallel with filter capacitor described in connect two, described bleeder resistance be connected in parallel on series connection two described in the two ends of filter capacitor, constitute a full-wave voltage doubler；
Described filter capacitor includes shell and the capacitor element being placed in described shell, described capacitor element includes capacitor core, negative wire and positive wire, described shell is by the anode electrode set being placed in two ends, negative electrode set and the insulation sleeve being connected between described anode electrode set and described negative electrode set are constituted, described insulation sleeve and described anode electrode set, connected by snap between described negative electrode set, it is provided with draw-in groove at the two ends of described insulation sleeve internal face, it is provided with the snap fit corresponding with described draw-in groove with one end that described insulation sleeve is connected what described anode electrode set overlapped with described negative electrode, buckle in corresponding described draw-in groove by described snap fit, make described anode electrode set, negative electrode set is interconnected to form shell with described insulation sleeve；Described insulation sleeve is heat conductive insulating set, is provided with radiatinig corrugated on the outer surface of described anode electrode set and described negative electrode set；Heat conductive insulating epoxy resin it is filled with between described capacitor core and described shell inner cavity；
Described capacitor core includes by the porous tantalum powder sintering block positive electrode substrate of high temperature sintering after tantalum metal powder briquet, the surface of described tantalum powder sintering block positive electrode substrate is formed with TaO5 film through anodic oxidation, negative pole end in described tantalum powder sintering block positive electrode substrate forms solid electrolyte MnO2 layer by impregnating manganese nitrate then through high temperature sintering, described solid electrolyte MnO2 layer is coated with negative pole graphite linings, described negative pole graphite linings is coated with terne metal conductive layer, described positive wire extend out in described tantalum powder sintering block positive electrode substrate and contacts with described anode electrode set, described negative wire extend out to from described solid electrolyte MnO2 layer and contacts with described negative electrode set；Described filter capacitor lies on described pcb board, and described anode electrode set and described negative electrode set are welded on described pcb board.
2. the rectifier filter that thermal diffusivity according to claim 1 is good, it is characterised in that described negative wire is copper wire, described positive wire is nickel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195111.1A CN105742063A (en) | 2016-03-31 | 2016-03-31 | Rectifier filter with high thermal dissipation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195111.1A CN105742063A (en) | 2016-03-31 | 2016-03-31 | Rectifier filter with high thermal dissipation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105742063A true CN105742063A (en) | 2016-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610195111.1A Pending CN105742063A (en) | 2016-03-31 | 2016-03-31 | Rectifier filter with high thermal dissipation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105742063A (en) |
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2016
- 2016-03-31 CN CN201610195111.1A patent/CN105742063A/en active Pending
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Application publication date: 20160706 |
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