CN205509849U - A passive power factor correction circuit of additional LC vibration for liquid crystal TV power - Google Patents
A passive power factor correction circuit of additional LC vibration for liquid crystal TV power Download PDFInfo
- Publication number
- CN205509849U CN205509849U CN201620099979.7U CN201620099979U CN205509849U CN 205509849 U CN205509849 U CN 205509849U CN 201620099979 U CN201620099979 U CN 201620099979U CN 205509849 U CN205509849 U CN 205509849U
- Authority
- CN
- China
- Prior art keywords
- power
- circuit
- liquid crystal
- vibration
- winding
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a liquid crystal TV power technical field provides a passive power factor correction circuit of additional LC vibration for liquid crystal TV power to solve present high -power liquid crystal TV power's power factor correction technology complicacy and the higher problem of cost, this correction circuit includes rectifier circuit, high -frequency filtering circuit, power supply switch circuit, vibration inductance, freewheeling diode, vibration electric capacity. The utility model provides a technical scheme does not contain active device, can use with the cooperation of power supply switch circuit branch road, and stable in structure is high -efficient, and with low costs, parameter adjustment's is small in quantity, can wide application in all kinds of liquid crystal TV power, and all kinds of liquid crystal TV power of specially adapted host computer core and the integrated fabric swatch of power.
Description
Technical field
This utility model relates to liquid crystal television power supply technical field, particularly to one for liquid crystal television power supply
Additional LC vibrate passive power factor correcting circuit.
Background technology
Along with the development of lcd technology, more than 50 inches large scales, 2K, 4K high-resolution etc.
LCD TV gradually starts to popularize, and the complete machine power consumption of LCD TV increases the most therewith, and this is accomplished by liquid crystal
TV power supply has circuit of power factor correction so that the Harmonics of Input distortion fall that large power supply causes
Low, improve the power supplying efficiency of electrical network.
The power factor correction technology of current existing high-power liquid crystal television power supply, entirely uses active
Circuit calibration technology.APFC is to be controlled metal-oxide-semiconductor by inductance and two by integrated IC
Pole pipe carries out the active circuit boosted, and the output electric current that circuit adjusts IC according to the change of power source loads power is protected
Stablizing of card booster circuit, so that the load of alternating current power supply keeps linear characteristic, and then reduces alternating current
The Resonance Wave Composition of source input current, keeps stablizing of line voltage, improves the power supplying efficiency of electrical network.Active merit
The feedback controling mode that rate factor correcting circuit uses, is characterized in that control accuracy is higher, stable work in work,
Calibration result is obvious.Deficiency is that control circuit is complicated, and the device of use is more, needs special integrating control
IC and high-power MOS tube, relatively costly, the PCB surface taken is long-pending big, and parameter testing requires height, exploitation
Cycle length etc..
Utility model content
[solving the technical problem that]
The purpose of this utility model is to provide a kind of additional LC vibration Passive Power for liquid crystal television power supply
Factor correcting circuit, with solve the power factor correction technology of current high-power liquid crystal television power supply complicated and
And relatively costly problem.
[technical scheme]
This utility model is achieved through the following technical solutions.
This utility model relates to a kind of additional LC vibration PPFC for liquid crystal television power supply
Circuit, the high-frequency filter circuit being connected with rectification circuit including rectification circuit, power switch circuit, described
Power switch circuit includes mains transformer, power filtering capacitor and on and off switch metal-oxide-semiconductor, and described power supply becomes
Depressor includes primary anode winding, primary middle winding and primary negative terminal winding, described primary anode winding
Front end is connected with the positive pole of power filtering capacitor, described passive power factor correcting circuit also include vibrate inductance,
Fly-wheel diode, oscillating capacitance, one end of described vibration inductance is connected with high-frequency filter circuit, described vibration
The other end of inductance is connected with one end of the positive pole of fly-wheel diode, oscillating capacitance, described fly-wheel diode
Negative pole is connected with the front end of winding in the middle of primary, after the other end of described oscillating capacitance winding middle with primary
End connects, and the described primary rear end of negative terminal winding is connected with the drain electrode of on and off switch metal-oxide-semiconductor.
As another preferred embodiment, described high-frequency filter circuit includes high-frequency filter capacitor, rectification
Diode, the first resistance, the first electric capacity, the second resistance and the second electric capacity, described high-frequency filter capacitor is with whole
The stream positive pole of diode, the outfan of rectification circuit connect, after described first resistance and the first capacitances in series also
It is associated in the two ends of commutation diode, described second resistance and the second capacitances in series, one end of described second resistance
Ground connection, described one end of second electric capacity is connected with the negative pole of commutation diode.
As another preferred embodiment, described rectification circuit is bridge rectifier.
[beneficial effect]
The technical scheme that the utility model proposes has the advantages that
The passive power factor correcting circuit that the utility model proposes does not contains active device, it is possible to on and off switch
Circuit branch is efficient with the use of, Stability Analysis of Structures, and low cost, the quantity of parameter adjustment is few.
Accompanying drawing explanation
The additional LC for liquid crystal television power supply that Fig. 1 provides for embodiment one of the present utility model vibrates passive
The schematic diagram of circuit of power factor correction.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below will be to this utility model
Detailed description of the invention carry out clear, complete description.
Embodiment one
The additional LC passive merit of vibration for liquid crystal television power supply that Fig. 1 provides for this utility model embodiment one
Rate factor correcting circuit.As it is shown in figure 1, it includes rectification circuit DP, high-frequency filter circuit, on and off switch
Circuit, vibration inductance L1, sustained diode 2, oscillating capacitance C2.
Rectification circuit DP is bridge rectifier, and its input is AC signal, and it is output as direct current signal.High
Frequently filter circuit is connected with the output of rectification circuit DP.
High-frequency filter circuit include high-frequency filter capacitor Ca, commutation diode Da, resistance Rb, electric capacity Cb,
Resistance Rc and electric capacity Cc, high-frequency filter capacitor Ca and the positive pole of commutation diode Da, rectification circuit DP
Outfan connect, high-frequency interferencing signal is filtered after rectification circuit DP by high-frequency filter capacitor Ca,
Diode Da carries out rectification to high-frequency interferencing signal after rectification circuit DP.Resistance Rb and electric capacity Cb series connection
After be connected in parallel on the two ends of commutation diode, commutation diode Da, resistance Rb and electric capacity Cb and form rectification two pole
Pipe goes to turn off spike circuit, is used for removing shutoff spike.Resistance Rc and electric capacity Cc series connection, the one of resistance Rc
End ground connection, one end of electric capacity Cc is connected with the negative pole of commutation diode Da, commutation diode Da, resistance
Rc and electric capacity Cc composition commutation diode goes to turn on spike circuit, is used for removing conducting spike.Pass through high frequency
Filter circuit can reduce the high-frequency signal produced in rectification circuit DP to PPFC thereafter
The impact of circuit.
Power switch circuit includes mains transformer T, power filtering capacitor C and on and off switch metal-oxide-semiconductor Q,
Wherein mains transformer T includes primary anode winding Lp1, primary middle winding Lp2 and primary negative terminal winding
Lp3。
One end of vibration inductance L1 is connected with high-frequency filter circuit, i.e. the negative pole with commutation diode Da is connected.
The other end of vibration inductance L1 is connected with positive pole, one end of oscillating capacitance C2 of sustained diode 2, continuous
In the middle of negative pole and the primary of stream diode D2, the front end of winding Lp2 is connected, the other end of oscillating capacitance C2 and
In the middle of primary, the rear end of winding Lp2 connects, the rear end of primary negative terminal winding Lp3 and on and off switch metal-oxide-semiconductor Q
Drain electrode connect, the primary front end of anode winding Lp1 is connected with the positive pole of power filtering capacitor C, power supply filter
The minus earth of ripple electric capacity C.
Below operation principle of the present utility model is illustrated.
The circuit of power factor correction that this utility model provides, is at existing liquid crystal television power supply active power
On the basis of factor correcting circuit, cancel integrating control IC and high-power MOS tube, it is achieved liquid crystal television power supply
The circuit of power factor correction that the correction of power factor, i.e. this utility model provide is PPFC
Circuit, the specifically working method of the correcting circuit in this utility model, be not by inductance, diode and collection
Become control IC, high-power MOS tube composition on-off circuit switch oscillating working method, but use by inductance,
The LC oscillatory work mode of capacitances in series two oscillating circuits of composition.
During on and off switch metal-oxide-semiconductor Q turns on, oscillating capacitance D2 is charged, when filling by vibration inductance L1
When electricity is to the conducting of sustained diode 2, sustained diode 2 power filtering capacitor C carry out discharging same
Time, continue via winding Lp2 in the middle of power switch transformer T primary and primary negative terminal winding Lp3 inductance
Stream, freewheeling state is continued until that on and off switch metal-oxide-semiconductor Q turns off；Turn off on and off switch metal-oxide-semiconductor Q
After, the energy in vibration inductance L1 is during boosting, through sustained diode 2, via
Power switch transformer T primary anode winding Lp1 inductance, is charged to the filter capacitor C of power supply.
Along with on and off switch metal-oxide-semiconductor Q periodically turn-on and turn-off, vibrate inductance L1 and oscillating capacitance C2
Carry out periodically charging and discharging therewith, and by sustained diode 2, at Switching Power Supply filter capacitor C
Periodically while discharge and recharge, via the inductance of the primary each winding of switch transformer, periodically fill
Electric discharge supplements.Especially, during the conducting of on and off switch metal-oxide-semiconductor Q, at the beginning of switch transformer T
The internal each winding inductance of level, the electric discharge to power filtering capacitor C carries out the supplementary electric discharge of additional afterflow so that hand over
The linearity of stream power source loads energy variation increases, and expands the angle of flow of power supply input AC electric current, and then
Reduce the higher hamonic wave composition of power switch circuit input AC electric current, it is achieved that power switch circuit is stable
PPFC.
As can be seen from the above embodiments, the passive power factor correcting circuit that this utility model embodiment proposes
Without active device, it is possible to efficient with the use of, Stability Analysis of Structures with power switch circuit branch road, low cost,
The quantity of parameter adjustment is few, can be widely applied to all kinds of liquid crystal television power supply, be particularly well-suited to main frame core and
All kinds of liquid crystal television power supplies of power supply integration fabric swatch.
It is to be appreciated that embodiments described above is a part of embodiment of the present utility model rather than all
Embodiment, is not to restriction of the present utility model.Based on embodiment of the present utility model, this area is common
The every other embodiment that technical staff is obtained under not paying creative work premise, broadly falls into this practicality
Novel protection domain.
Claims (3)
1., for an additional LC vibration passive power factor correcting circuit for liquid crystal television power supply, it includes
High-frequency filter circuit that rectification circuit is connected with rectification circuit, power switch circuit, described on and off switch electricity
Road includes mains transformer, power filtering capacitor and on and off switch metal-oxide-semiconductor, at the beginning of described mains transformer includes
Level anode winding, primary middle winding and primary negative terminal winding, the front end of described primary anode winding and power supply
The positive pole of filter capacitor connects, it is characterised in that: described passive power factor correcting circuit also includes vibration electricity
Sense, fly-wheel diode, oscillating capacitance, one end of described vibration inductance is connected with high-frequency filter circuit, described
The other end of vibration inductance is connected with the positive pole of fly-wheel diode, one end of oscillating capacitance, described afterflow two pole
The negative pole of pipe is connected with the front end of winding in the middle of primary, the other end of described oscillating capacitance winding middle with primary
Rear end connect, the described primary rear end of negative terminal winding is connected with the drain electrode of on and off switch metal-oxide-semiconductor.
Additional LC vibration passive power factor for liquid crystal television power supply the most according to claim 1
Correcting circuit, it is characterised in that described high-frequency filter circuit include high-frequency filter capacitor, commutation diode,
One resistance, the first electric capacity, the second resistance and the second electric capacity, described high-frequency filter capacitor and commutation diode
Positive pole, the outfan of rectification circuit connect, and are connected in parallel on rectification two after described first resistance and the first capacitances in series
The two ends of pole pipe, described second resistance and the second capacitances in series, one end ground connection of described second resistance is described
One end of second electric capacity is connected with the negative pole of commutation diode.
Additional LC vibration passive power factor for liquid crystal television power supply the most according to claim 1
Correcting circuit, it is characterised in that described rectification circuit is bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620099979.7U CN205509849U (en) | 2016-01-29 | 2016-01-29 | A passive power factor correction circuit of additional LC vibration for liquid crystal TV power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620099979.7U CN205509849U (en) | 2016-01-29 | 2016-01-29 | A passive power factor correction circuit of additional LC vibration for liquid crystal TV power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205509849U true CN205509849U (en) | 2016-08-24 |
Family
ID=56724683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620099979.7U Active CN205509849U (en) | 2016-01-29 | 2016-01-29 | A passive power factor correction circuit of additional LC vibration for liquid crystal TV power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205509849U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070194A (en) * | 2017-03-15 | 2017-08-18 | 四川长虹电器股份有限公司 | Single channel LC vibrates the double flyback sourses for realizing PPFC |
-
2016
- 2016-01-29 CN CN201620099979.7U patent/CN205509849U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070194A (en) * | 2017-03-15 | 2017-08-18 | 四川长虹电器股份有限公司 | Single channel LC vibrates the double flyback sourses for realizing PPFC |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101821930A (en) | DC transformer | |
| CN102857128B (en) | AC/DC change-over circuit | |
| CN206575206U (en) | A kind of charger circuit structure | |
| CN206389273U (en) | A kind of power supply adaptor | |
| CN205509849U (en) | A passive power factor correction circuit of additional LC vibration for liquid crystal TV power | |
| CN202334313U (en) | High-voltage switch power supply circuit with power-factor correction function | |
| CN104393783A (en) | Dielectric barrier discharge type ozone generator power supply with constant peak voltage and current | |
| CN205509850U (en) | A passive power factor correction circuit of LC branch road vibration for liquid crystal TV power | |
| CN103633828A (en) | Control circuit in power factor correction circuit | |
| CN201319691Y (en) | Ballast for electricity-saving lamp | |
| CN106849687B (en) | Double flyback sourses of passive power factor correction are realized in two-way LC oscillation | |
| CN107070194A (en) | Single channel LC vibrates the double flyback sourses for realizing PPFC | |
| CN109347318A (en) | Double flyback sourse circuits of recoverable power factor | |
| CN205596014U (en) | A double - circuit LC passive power passive power factor correction that vibrates for LCD TV POWER | |
| CN102781147A (en) | LED (Light-emitting diode) power supply circuit with high power factor | |
| CN101656468B (en) | High-frequency passive power factor correction circuit and high-frequency passive power factor correction method | |
| CN205160358U (en) | Electron terminal and LLC power supply thereof | |
| CN203872267U (en) | LED TV power supply backlight driving circuit | |
| CN202798470U (en) | Liquid crystal display television LLC resonant power supply assembly | |
| CN206498569U (en) | A kind of high-power LED driving power source | |
| CN201252480Y (en) | High-frequency passive PFC circuit | |
| CN206149543U (en) | Single -stage high power factor's LED drive power supply | |
| CN209462251U (en) | A kind of switching power circuit and Switching Power Supply | |
| CN203278658U (en) | Switch power supply circuit | |
| CN201378739Y (en) | Power factor correction circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |