CN107070194A - Single channel LC vibrates the double flyback sourses for realizing PPFC - Google Patents
Single channel LC vibrates the double flyback sourses for realizing PPFC Download PDFInfo
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- CN107070194A CN107070194A CN201710153332.7A CN201710153332A CN107070194A CN 107070194 A CN107070194 A CN 107070194A CN 201710153332 A CN201710153332 A CN 201710153332A CN 107070194 A CN107070194 A CN 107070194A
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4266—Arrangements for improving power factor of AC input using passive elements
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to power technology.Need the problem of active circuit is corrected there is provided double flyback sourses that PPFC is realized in a kind of single channel LC vibrations the present invention is to solve the PFC of existing pair of flyback sourse, its technical scheme can be summarized as：Single channel LC vibrates the double flyback sourses for realizing PPFC, including high-frequency filter circuit, two-way reverse exciting switching voltage regulator, additional afterflow correction circuit and filter capacitor, reverse exciting switching voltage regulator includes switch transformer, wherein, the primary coil anode connection of two switch transformers of two-way reverse exciting switching voltage regulator, and be connected with the positive pole of filter capacitor, the negative pole ground connection of filter capacitor, additional afterflow correction circuit includes vibration inductance, oscillating capacitance and fly-wheel diode.The beneficial effects of the invention are as follows, realize simply, it is with low cost, it is adaptable to double flyback sourses.
Description
Technical field
The present invention relates to power technology, more particularly to possess double flyback sourse technologies of PFC.
Background technology
With continuing to develop for lcd technology, the liquid crystal electricity such as more than 50 cun large scales, 4K × more than 2K high-resolution
Depending on gradually starting popularization, the complete machine consumption power of LCD TV also increases therewith, and this is accomplished by liquid crystal television power supply increase output
Power, while having Active PFC function.This kind of large power supply Harmonics of Input distortion is low, is favorably improved power network
Power supplying efficiency, and it is not only used for LCD TV, apply also for it is various required for electric equipments.
Current existing high-power liquid crystal television power supply, it generally comprises double flyback sourses, its power factor correction technology,
Active circuit alignment technique is all used, APFC is to control metal-oxide-semiconductor by integrated chip, passes through inductance
The active circuit boosted with diode, the output current that circuit adjusts integrated chip according to the change of power source loads power is protected
The stabilization of booster circuit is demonstrate,proved, so that the load of AC power keeps linear characteristic, and then AC power input current is reduced
Harmonic components, keep line voltage stabilization, improve power network power supplying efficiency.It is anti-that APFC is used
Control mode is presented, is characterized in that control accuracy is higher, stable work in work, substantially, deficiency is that control circuit is complicated to calibration result,
It is more, it is necessary to which integrated control chip (above-mentioned integrated chip) and high-power MOS tube specially, circuit cost is high, account for using device
With printing, plate suqare is big, parameter testing is complicated, and the construction cycle is long.Existing pair of flyback sourse generally comprises High frequency filter all the way
Circuit and two-way reverse exciting switching voltage regulator, reverse exciting switching voltage regulator include switch transformer and power switch metal-oxide-semiconductor, switch transformer tool
There are primary coil anode winding, primary coil centre winding and primary coil negative terminal winding, wherein, primary coil anode winding
Two ends, one end is connected as primary coil anode, the other end and primary coil centre winding, winding and primary in the middle of primary coil
One end of coil anode winding connection can be described as the front end of winding in the middle of primary coil, and the other end can be described as spaced winding in primary coil
The rear end of group, is connected with one end of primary coil negative terminal winding, the other end and the power switch metal-oxide-semiconductor of primary coil negative terminal winding
Connection, positive pole of the primary coil anode typically with a filter capacitor is connected, the negative pole ground connection of filter capacitor, high-frequency filter circuit
The rectifying device of AC power, high-frequency filter capacitor are generally comprised, high-frequency rectification diode, shut-off spike circuit is removed and goes conducting
The positive pole of spike circuit, the output end of the rectifying device of AC power and one end of high-frequency filter capacitor and high-frequency rectification diode
Connection, the other end ground connection of high-frequency filter capacitor, goes the electric routing resistance one of shut-off spike and electric capacity one to be composed in series, its one end with
The positive pole connection of high-frequency rectification diode, the other end is connected with the negative pole of high-frequency rectification diode, removes conducting spike circuit by electricity
Resistance two and electric capacity two are composed in series, and one end is connected with the negative pole of high-frequency rectification diode, other end ground connection, high-frequency rectification diode
Negative pole as high-frequency filter circuit output end.
The content of the invention
Asking for active circuit correction is needed the invention aims to the PFC for solving double flyback sourses at present
Inscribe the double flyback sourses for being vibrated there is provided a kind of single channel LC and realizing PPFC.
The present invention solves its technical problem, and the technical scheme of use is that PPFC is realized in single channel LC vibrations
Double flyback sourses, including high-frequency filter circuit and two-way reverse exciting switching voltage regulator, the reverse exciting switching voltage regulator includes switch transformation
Device, it is characterised in that also including additional afterflow correction circuit and filter capacitor, two switches of the two-way reverse exciting switching voltage regulator
The primary coil anode connection of transformer, and be connected with the positive pole of filter capacitor, the negative pole ground connection of filter capacitor, additional afterflow school
Positive circuit includes vibration inductance, oscillating capacitance and fly-wheel diode, one end of the vibration inductance and high-frequency filter circuit it is defeated
Go out end connection, one end and fly-wheel diode of the other end and oscillating capacitance positive pole connection, the positive pole of fly-wheel diode with wherein
The front end of winding is connected in the middle of the primary coil of the switch transformer of reverse exciting switching voltage regulator all the way, winding in the middle of the primary coil
The other end connection of rear end and oscillating capacitance.
Specifically, the high-frequency filter circuit includes rectifying device, high-frequency filter capacitor, the high-frequency rectification two of AC power
Pole pipe, go shut-off spike circuit and go turn on spike circuit, the output end and high-frequency filter capacitor of the rectifying device of AC power
One end and high-frequency rectification diode positive pole connection, high-frequency filter capacitor the other end ground connection, go shut-off spike circuit by electricity
Resistance one and electric capacity one are composed in series, and its one end is connected with the positive pole of high-frequency rectification diode, the other end and high-frequency rectification diode
Negative pole connection, go the electric routing resistance two of conducting spike and electric capacity two to be composed in series, one end and the negative pole of high-frequency rectification diode
Connection, other end ground connection, the negative pole of high-frequency rectification diode as high-frequency filter circuit output end.
Further, reverse exciting switching voltage regulator includes switch transformer and power switch metal-oxide-semiconductor, and switch transformer has primary
Winding and primary coil negative terminal winding, the two ends of the primary coil anode winding, one in the middle of coil anode winding, primary coil
End is connected as primary coil anode, the other end and primary coil centre winding, and primary coil centre winding and primary coil are just
One end of end winding connection can be described as the front end of winding in the middle of primary coil, and the other end can be described as in the middle of primary coil after winding
End, is connected, the other end of primary coil negative terminal winding is connected with power switch metal-oxide-semiconductor with one end of primary coil negative terminal winding.
The beneficial effects of the invention are as follows in the present invention program, passive power factor is realized by above-mentioned single channel LC vibrations
Double flyback sourses of correction are there is provided a kind of inexpensive double flyback sourses with PFC, and its realization is simple, into
This is cheap, and its stable working state, and parameter adjustment is convenient.
Brief description of the drawings
Fig. 1 realizes that the circuit of double flyback sourses of PPFC shows for single channel LC vibrations in the embodiment of the present invention
It is intended to.
Wherein, DP is the rectifying device of AC power, and Ca is high-frequency filter capacitor, and Da is high-frequency rectification diode, and Rb is
Resistance one, Cb is electric capacity one, and Rc is resistance two, and Cc is electric capacity two, and L1 is vibration inductance, and C2 is oscillating capacitance, and C is filtered electrical
Hold, D2 is fly-wheel diode, T1 is switch transformer one, and T2 is switch transformer two, and Q1 is power switch metal-oxide-semiconductor one, and Q2 is
Power switch metal-oxide-semiconductor two, Lp1-1 is the primary coil anode winding of switch transformer one, and Lp1-2 is the primary line of switch transformer
Winding in the middle of circle, Lp1-3 is the primary coil negative terminal winding of switch transformer one, and Lp2-1 is the primary line of switch transformer two
Anode winding is enclosed, Lp2-3 is the primary coil negative terminal winding of switch transformer two.
Embodiment
Below in conjunction with the accompanying drawings and embodiment, technical scheme is described in detail.
Double flyback sourses of PPFC, including High frequency filter electricity are realized in single channel LC vibrations of the present invention
Road, two-way reverse exciting switching voltage regulator, additional afterflow correction circuit and filter capacitor, reverse exciting switching voltage regulator include switch transformer, its
In, the primary coil anode connection of two switch transformers of two-way reverse exciting switching voltage regulator, and be connected with the positive pole of filter capacitor,
The negative pole ground connection of filter capacitor, additional afterflow correction circuit includes vibration inductance, oscillating capacitance and fly-wheel diode, vibrates inductance
One end and the output end of high-frequency filter circuit connect, the positive pole of one end and fly-wheel diode of the other end and oscillating capacitance connects
Connect, the front end of the positive pole of fly-wheel diode and winding in the middle of the primary coil of the wherein switch transformer of reverse exciting switching voltage regulator all the way
The other end of the rear end of winding and oscillating capacitance is connected in the middle of connection, the primary coil.
Embodiment
Double flyback sourses of PPFC, including High frequency filter are realized in the single channel LC vibrations of the embodiment of the present invention
Circuit, two-way reverse exciting switching voltage regulator, additional afterflow correction circuit and filter capacitor, reverse exciting switching voltage regulator include switch transformer,
Wherein, the primary coil anode connection of two switch transformers of two-way reverse exciting switching voltage regulator, and connect with the positive pole of filter capacitor
Connect, the negative pole ground connection of filter capacitor, additional afterflow correction circuit includes vibration inductance, oscillating capacitance and fly-wheel diode, vibration
One end of inductance and the output end of high-frequency filter circuit are connected, the positive pole of one end and fly-wheel diode of the other end and oscillating capacitance
Connection, the positive pole of fly-wheel diode with before winding in the middle of the primary coil of the wherein switch transformer of reverse exciting switching voltage regulator all the way
The rear end of winding and the other end of oscillating capacitance are connected in the middle of end connection, the primary coil.
In this example, high-frequency filter circuit includes the rectifying device, high-frequency filter capacitor, the pole of high-frequency rectification two of AC power
Manage, go shut-off spike circuit and going to turn on spike circuit, the output end of the rectifying device of AC power and high-frequency filter capacitor
The positive pole connection of one end and high-frequency rectification diode, the other end ground connection of high-frequency filter capacitor removes the electric routing resistance of shut-off spike
One and electric capacity one be composed in series, its one end is connected with the positive pole of high-frequency rectification diode, the other end and high-frequency rectification diode
Negative pole is connected, and goes the electric routing resistance two of conducting spike and electric capacity two to be composed in series, and one end and the negative pole of high-frequency rectification diode connect
Connect, other end ground connection, the negative pole of high-frequency rectification diode as high-frequency filter circuit output end.
Reverse exciting switching voltage regulator includes switch transformer and power switch metal-oxide-semiconductor, and switch transformer has primary coil anode
Winding and primary coil negative terminal winding, the two ends of the primary coil anode winding in the middle of winding, primary coil, one end is as first
Winding is connected in the middle of level coil anode, the other end and primary coil, and winding connects with primary coil anode winding in the middle of primary coil
The one end connect can be described as the front end of winding in the middle of primary coil, and the other end can be described as the rear end of winding in the middle of primary coil, and first
One end of level coil negative terminal winding is connected, and the other end of primary coil negative terminal winding is connected with power switch metal-oxide-semiconductor.
Below using two-way reverse exciting switching voltage regulator be respectively first via reverse exciting switching voltage regulator and the second road reverse exciting switching voltage regulator as
Example be described in detail, its circuit diagram referring to Fig. 1, wherein, first via reverse exciting switching voltage regulator include the T1 of switch transformer one
And the Q1 of power switch metal-oxide-semiconductor one, the second road reverse exciting switching voltage regulator include the T2 of the switch transformer two and Q2 of power switch metal-oxide-semiconductor two,
Particular circuit configurations are：The rectifying device DP of AC power output end and high-frequency filter capacitor Ca one end and high-frequency rectification two
Pole pipe Da positive pole connection, high-frequency filter capacitor Ca other end ground connection, removes the shut-off spike electricity Rb of routing resistance one and electric capacity one
Cb is composed in series, and its one end is connected with high-frequency rectification diode Da positive pole, the negative pole of the other end and high-frequency rectification diode Da
Connection, goes the conducting spike electricity Rc of the routing resistance two and Cc of electric capacity two to be composed in series, one end and high-frequency rectification diode Da negative pole
Connection, other end ground connection, high-frequency rectification diode Da negative pole as high-frequency filter circuit output end, with vibration inductance L1's
One end is connected, and the vibration inductance L1 other end is connected with oscillating capacitance C2 one end and the positive pole of sustained diode 2, the first via
In reverse exciting switching voltage regulator, the T1 of switch transformer one primary coil anode winding Lp1-1 two ends, one end is used as first via flyback
Winding Lp1- in the middle of winding Lp1-2 connections in the middle of the primary coil anode of Switching Power Supply, the other end and primary coil, primary coil
2 one end being connected with primary coil anode winding can be described as the front end of winding Lp1-2 in the middle of primary coil, and the other end can be described as just
Winding Lp1-2 rear end, is connected with primary coil negative terminal winding Lp1-3 one end in the middle of level coil, primary coil negative terminal winding
The Lp1-3 other end is connected with the Q1 of power switch metal-oxide-semiconductor one, the second road reverse exciting switching voltage regulator and first via reverse exciting switching voltage regulator knot
Structure is identical, and its switch transformer two T2 primary coil negative terminal winding Lp2-3 is connected with the Q2 of power switch metal-oxide-semiconductor two, primary line
Anode winding Lp2-1 is enclosed as that one end of primary coil anode with the primary coil anode of first via reverse exciting switching voltage regulator to connect
Connect, and be connected with filter capacitor C positive pole, filter capacitor C negative pole ground connection, in this example, the positive pole of sustained diode 2 and the
Winding Lp1-2 front end is connected in the middle of the T1 of switch transformer one of reverse exciting switching voltage regulator primary coil all the way, the primary coil
Middle winding Lp1-2 rear end is connected with the oscillating capacitance C2 other end.
This example is composed in series LC oscillating circuits by vibrating inductance L1 and oscillating capacitance C2 first, after electric power starting, opens
Galvanization carries out energy storage when flowing through vibration inductance L1.In this process, the high-frequency signal come for reduction capable AC input tape
Interference, high-frequency filter capacitor Ca is filtered after the rectifying device DP of AC power to high-frequency interferencing signal, high-frequency rectification two
Pole pipe Da carries out rectification, the Rb of resistance one, the Cb of electric capacity one series connection pair after the rectifying device DP of AC power to high-frequency interferencing signal
High-frequency rectification diode Da removes shut-off spike, and the Rc of resistance two, the Cc of electric capacity two series connection are removed to high-frequency rectification diode Da again to be led
Logical spike；High-frequency filter circuit be used for reducing the high-frequency signal that is produced in power supply input circuit to two-way Passive Power thereafter because
The influence of number correcting circuit.
Then this example utilizes the operation principle of Switching Power Supply, during the Q1 of power switch metal-oxide-semiconductor one is turned on, and vibrates inductance L1
Oscillating capacitance C2 is charged, when charging to the conducting voltage of sustained diode 2, sustained diode 2 is switched in two-way flyback
While the common filter capacitor C of power supply is discharged, via the T1 of switch transformer one primary coil in the middle of winding Lp1-2 and
Primary coil negative terminal winding Lp1-3 inductance carries out afterflow, and freewheeling state is continued until that the Q1 of power switch metal-oxide-semiconductor one is turned off；
After the Q1 of power switch metal-oxide-semiconductor one shut-offs, the energy in inductance L1 is vibrated during being boosted, by the pole of afterflow two
Pipe D2, via the T1 of switch transformer one primary coil anode winding Lp1-1 inductance, to the common filter of two-way reverse exciting switching voltage regulator
Ripple electric capacity C is charged.
With the Q1 of the switch metal-oxide-semiconductor one periodically turn-on and turn-off of first via reverse exciting switching voltage regulator, vibration inductance L1 and
Oscillating capacitance C2 is periodically charged and discharged therewith, and being total in two-way reverse exciting switching voltage regulator by sustained diode 2
With filter capacitor C, periodically while discharge and recharge, via the primary lines of the T1 of switch transformer one of first via reverse exciting switching voltage regulator
The inductance of each winding (anode winding, middle winding and negative terminal winding) is enclosed, periodically discharge and recharge is carried out and supplements.Particularly in electricity
During the Q1 of source switch metal-oxide-semiconductor one conducting, via each winding inductance inside the T1 primary coils of switch transformer one, to two-way flyback
The common filter capacitor C of Switching Power Supply electric discharge carries out additional afterflow supplement electric discharge so that the change of AC power load energy
Linearity increase, expands the angle of flow of capable AC input current, and then reduce the height of Switching Power Supply AC input current
Subharmonic composition.
Thus, by the additional afterflow correction circuit of first via reverse exciting switching voltage regulator, PFC is carried out, is realized double anti-
Swash the PPFC function of power good.
Double flyback sourses of PPFC are realized in above-mentioned single channel LC vibrations, only with one group of inductance, electric capacity, two poles
The passive devices such as pipe, without active devices such as integrated control chip, high-power MOS tubes, realize the power factor of double flyback sourses
Correction.The passive power factor correcting circuit dynamic duty stabilization of reverse exciting switching voltage regulator, parameter adjustment are convenient all the way；Power all the way
Factor correcting circuit is free of active device, and cost is relatively low.Therefore it is that circuit structure is stable, parameter adjustment is easy, device cost is low
It is honest and clean, with high-power pair of flyback sourse for stablizing PPFC function.It can be widely applied to all kinds of high-power liquid
Brilliant TV, while being also applied for other high-power electric appliance equipment.
Claims (3)
1. single channel LC vibrates the double flyback sourses for realizing PPFC, including high-frequency filter circuit and two-way flyback are opened
Powered-down source, the reverse exciting switching voltage regulator includes switch transformer, it is characterised in that also including additional afterflow correction circuit and filtering
Electric capacity, the primary coil anode connection of two switch transformers of the two-way reverse exciting switching voltage regulator, and with filter capacitor just
Pole is connected, and the negative pole ground connection of filter capacitor, additional afterflow correction circuit includes vibration inductance, oscillating capacitance and fly-wheel diode,
One end of the vibration inductance and the output end of high-frequency filter circuit are connected, the pole of one end and afterflow two of the other end and oscillating capacitance
The positive pole connection of pipe, the positive pole of fly-wheel diode with wherein all the way in the middle of the primary coil of the switch transformer of reverse exciting switching voltage regulator
The rear end of winding and the other end of oscillating capacitance are connected in the middle of the front end connection of winding, the primary coil.
2. double flyback sourses of PPFC are realized in single channel LC vibrations as claimed in claim 1, it is characterised in that
The rectifying device of the high-frequency filter circuit including AC power, high-frequency filter capacitor, high-frequency rectification diode, go to turn off spike
Circuit and go to turn on spike circuit, the output end of the rectifying device of AC power and one end of high-frequency filter capacitor and high-frequency rectification
The positive pole connection of diode, the other end ground connection of high-frequency filter capacitor goes the electric routing resistance one of shut-off spike and the series connection of electric capacity one
Composition, its one end is connected with the positive pole of high-frequency rectification diode, and the other end is connected with the negative pole of high-frequency rectification diode, goes conducting
Spike electricity routing resistance two and electric capacity two are composed in series, and one end is connected with the negative pole of high-frequency rectification diode, other end ground connection, high
The negative pole of frequency commutation diode as high-frequency filter circuit output end.
3. double flyback sourses of PPFC are realized in single channel LC vibrations as claimed in claim 1 or 2, its feature exists
Include switch transformer and power switch metal-oxide-semiconductor in, reverse exciting switching voltage regulator, switch transformer have primary coil anode winding,
Winding and primary coil negative terminal winding, the two ends of the primary coil anode winding in the middle of primary coil, one end is used as primary line
Enclose winding in the middle of anode, the other end and primary coil to connect, winding is connected with primary coil anode winding in the middle of primary coil
One end can be described as the front end of winding in the middle of primary coil, and the other end can be described as the rear end of winding in the middle of primary coil, with primary line
The one end for enclosing negative terminal winding is connected, and the other end of primary coil negative terminal winding is connected with power switch metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153332.7A CN107070194A (en) | 2017-03-15 | 2017-03-15 | Single channel LC vibrates the double flyback sourses for realizing PPFC |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710153332.7A CN107070194A (en) | 2017-03-15 | 2017-03-15 | Single channel LC vibrates the double flyback sourses for realizing PPFC |
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| CN107070194A true CN107070194A (en) | 2017-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710153332.7A Pending CN107070194A (en) | 2017-03-15 | 2017-03-15 | Single channel LC vibrates the double flyback sourses for realizing PPFC |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347318A (en) * | 2018-11-23 | 2019-02-15 | 四川长虹电器股份有限公司 | Double flyback sourse circuits of recoverable power factor |
| CN110739843A (en) * | 2019-10-28 | 2020-01-31 | 四川长虹电器股份有限公司 | Passive power factor correction circuit for flyback switching power supply |
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| CN205509849U (en) * | 2016-01-29 | 2016-08-24 | 四川长虹电器股份有限公司 | A passive power factor correction circuit of additional LC vibration for liquid crystal TV power |
| CN205509850U (en) * | 2016-01-29 | 2016-08-24 | 四川长虹电器股份有限公司 | A passive power factor correction circuit of LC branch road vibration for liquid crystal TV power |
| US20160322907A1 (en) * | 2015-05-01 | 2016-11-03 | Champion Microelectronic Corporation | Switching power supply and improvements thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203933434U (en) * | 2014-04-23 | 2014-11-05 | 苏州微盛特变新能源科技有限公司 | The photovoltaic miniature inverter of two flyback resonance |
| US20160322907A1 (en) * | 2015-05-01 | 2016-11-03 | Champion Microelectronic Corporation | Switching power supply and improvements thereof |
| CN204886706U (en) * | 2015-09-17 | 2015-12-16 | 航天长峰朝阳电源有限公司 | Two flyback converter converters of integrated integration series connection parallel combination formula |
| CN205509849U (en) * | 2016-01-29 | 2016-08-24 | 四川长虹电器股份有限公司 | A passive power factor correction circuit of additional LC vibration for liquid crystal TV power |
| CN205509850U (en) * | 2016-01-29 | 2016-08-24 | 四川长虹电器股份有限公司 | A passive power factor correction circuit of LC branch road vibration for liquid crystal TV power |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347318A (en) * | 2018-11-23 | 2019-02-15 | 四川长虹电器股份有限公司 | Double flyback sourse circuits of recoverable power factor |
| CN110739843A (en) * | 2019-10-28 | 2020-01-31 | 四川长虹电器股份有限公司 | Passive power factor correction circuit for flyback switching power supply |
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Application publication date: 20170818 |