CN101527503A - High-power factor correcting circuit - Google Patents
High-power factor correcting circuit Download PDFInfo
- Publication number
- CN101527503A CN101527503A CN200810083553A CN200810083553A CN101527503A CN 101527503 A CN101527503 A CN 101527503A CN 200810083553 A CN200810083553 A CN 200810083553A CN 200810083553 A CN200810083553 A CN 200810083553A CN 101527503 A CN101527503 A CN 101527503A
- Authority
- CN
- China
- Prior art keywords
- diode
- primary coil
- coil
- negative electrode
- connects
- 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.)
- Pending
Links
Images
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
- Rectifiers (AREA)
Abstract
The invention relates to a high-power factor correcting circuit, which comprises a rectifying bridge DB11, a switch transformer, two switch tubes Q12 and Q11, three capacitors C11, C13 and C12, and five diodes D11, D12, D13, D14 and D15, wherein the switch transformer is provided with three groups of primary coils which are a first primary coil L11, a second primary coil L12 and a third primary coil L13, and one group of secondary coil. When alternating current is at a peak value and nearby, the electrical energy transformed by the transformer is mainly from the rectified alternating current, and the electrical energy stored in a transformer leakage inductor and the rectified alternating current are used as the charge electrical energy of the energy storage capacitor C13 together. When the alternating current is at a wave trough and nearby, the electrical energy stored in a circuit (the capacitor C13) is transformed into the transformer transformation electrical energy, and the electrical energy stored in the transformer leakage inductor and the rectified alternating current are used as the charge electrical energy of the capacitor C13 together.
Description
Technical field
The present invention relates to power technology, relate in particular to a kind of single-level power factor correction power circuit
Background technology
In electrical network, there is great influence in various loads especially nonlinear load for mains supply.For example the power supply of many electrical equipment need be converted to direct current with the alternating current of electrical network.The pulsating current that produces in switching process comprises a large amount of current harmonics components, and these harmonic components blow back into electrical network, can cause the harmonic wave " pollution " to electrical network, causes the harmonic wave pressure drop when electric current flows through line impedance, and sinusoidal wave electrical network is distorted.
At present, China executes " CCC authentication " for household electrical appliances (the CCC authentication is " China Compulsory Certification ", reach the requirement of this standard, and various household electrical appliances must carry out capability correction.By research in recent years, the circuit of existing multiple raising power factor.
1. Passive Power is proofreaied and correct (PFC) circuit:
Passive PFC is by inductance, and elements such as electric capacity, diode compensation exchanges the fundamental current of input and the phase difference of voltage, forces electric current consistent with the phase place of voltage, can reduce power supply to the Harmonic Interference of electrical network and the electrical network Harmonic Interference to power supply.This circuit of power factor correction can be brought up to 0.7-0.8 with power factor, and current harmonic content drops to below 40%, and this circuit is widely used in middle low capacity equipment.Its characteristics mainly are that circuit is simple, and cost is low, the reliability height, easy to maintenance, EM is little etc., shortcoming is that the circuit volume is big and heavy, and power factor is not high.
2. APFC
It initiatively is power that this mode can be called, the factor correcting mode, sort circuit inserts a DC/DC switch converters between rectifier and load, applied current is put the feedback technology, by PFC special logic chip controls, the input current waveform was followed the tracks of in the whole electricity cycle exchanged input sinusoidal voltage waveform, this APFC, can make input current near sinusoidal, thereby make the total harmonic distortion amount of input (THD) less than 5%, power factor can bring up to 0.99% even higher, the problem of sort circuit is this circuit of power factor correction owing to increased the one-level circuit, increased circuit loss, grade switching tube device voltage parameter raising after while makes owing to the raising level has improved voltage, thus cost improved.
Summary of the invention
At the defective of above-mentioned various circuit, the technology that the present invention solves is, provides a kind of cost low, power-efficient height, the simple level PFC power circuit of good reliability.
The concrete PFC switching power circuit of the present invention's first scheme, comprise a rectifier bridge, a switch transformer, wherein switch transformer has three groups of primary coils, the first primary coil L11, second group of primary coil L12, the 3rd group of primary coil L13 and one group of secondary coil, two switching tubes, main switch Q12 and auxiliary switch Q11, three electric capacity; Filter capacitor C11, storage capacitor C13, clamp capacitor C12.Five diodes, first continues flows diode D11, and second continues flows diode D12, the first reverse isolation diode D13, the second reverse isolation diode D14, the 3rd reverse isolation diode D15.The input termination alternating current of wherein said rectifier bridge, described filter capacitor C11 is attempted by the output of rectifier bridge, the continue anode of stream diode D12 of described first anode and second that continues stream diode D11 connects the positive pole of rectifier bridge output, and the described first primary coil L11 two ends connect first the continue negative electrode of stream two utmost point D12 of stream diode D11 and second that continues respectively.The termination second of described second group of primary coil L12 continues and flows negative electrode and the first primary coil L11, one end of two utmost point D12, the anode of another termination main switch Q12 one end and the first reverse isolation diode D13.First negative electrode that continues stream diode D11 connects the negative electrode of the second reverse isolation diode D14, and wherein the first primary coil L11 meets first end and the second primary coil L12 that continues stream diode D11 negative electrode to connect second that end that continues the negative electrode that flows diode D12 be end of the same name.The negative pole of another termination rectifier bridge of described main switch Q12.The negative electrode of the described first reverse isolation diode D13 connects the anode of clamp capacitor C12 one end and the 3rd reverse isolation diode D15, the negative pole of another termination rectifier bridge of described clamp capacitor C12.The negative electrode of the 3rd reverse isolation diode D15 connects the end of the 3rd group of primary coil L13.The end of another termination auxiliary switch Q11 of described the 3rd group of primary coil L13 and the positive pole of storage capacitor C13, the negative pole of storage capacitor C13 connects the negative pole of rectifier bridge.The anode of another termination second reverse isolation diode D14 of described auxiliary switch Q11.It is end of the same name that end of the auxiliary switch Q11 that the 3rd group of primary coil L13 connects and the second primary coil L12 connect second that end of negative electrode that continues stream diode D12.
The concrete PFC switching power circuit of alternative plan of the present invention comprises a rectifier bridge DB21, an inductance, and wherein inductance has two groups of coils, the first coil L21, second group of coil L22, a switching tube Q21, two electric capacity; Filter capacitor C21, storage capacitor C22, four diodes, the first diode D21, the second diode D22, the 3rd diode D23, the 4th diode D24.The input termination alternating current of wherein said rectifier bridge, described filter capacitor C21 is attempted by the output of rectifier bridge, the anode of the anode of the described first diode D21 and the second diode D22 connects the positive pole of rectifier bridge output, the negative electrode of a termination first diode D21 of the described first coil L21, the end of another termination second coil L22, the anode of the 4th diode D24 and an end of load circuit.The negative electrode of another termination second diode D22 of the second coil L22 and the negative electrode of the 3rd diode D23, the anode of the 3rd diode D23 connects the end of switching tube Q21, another termination storage capacitor C22 positive pole of switching tube Q21 and the negative electrode of the 4th diode D24; The negative pole of storage capacitor C22 is born the negative pole that connects rectifier bridge with the other end on live road.The second coil L22 connects that end of the second diode D22 negative electrode and that end that the first coil L21 connects the first diode D21 negative electrode is an end of the same name, and two coils are same magnetic core.
Description of drawings
Fig. 1 is the concrete enforcement circuit diagram of the present invention's first scheme.
Fig. 2 is the concrete enforcement circuit diagram of alternative plan of the present invention.
Fig. 3 is a kind of load circuit of alternative plan.
Fig. 4 is the another kind of load circuit of alternative plan.
1. specific embodiments
Specific embodiments one is please referring to Fig. 1
The concrete PFC switching power circuit of the present invention's first scheme, comprise a rectifier bridge, a switch transformer, wherein switch transformer has three groups of primary coils, the first primary coil L11, second group of primary coil L12, the 3rd group of primary coil L13 and one group of secondary coil, two field effect transistor, home court effect pipe Q12 and auxiliary field effect transistor Q11, three electric capacity; Filter capacitor C11, storage capacitor C13, clamp capacitor C12.Five diodes, first continues flows diode D11, and second continues flows diode D12, the first reverse isolation diode D13, the second reverse isolation diode D14, the 3rd reverse isolation diode D15.The input termination alternating current of wherein said rectifier bridge, described filter capacitor C11 is attempted by the output of rectifier bridge, the continue anode of stream diode D12 of described first anode and second that continues stream diode D11 connects the positive pole of rectifier bridge output, and the described first primary coil L11 two ends connect first the continue negative electrode of stream two utmost point D12 of stream diode D11 and second that continues respectively.The termination second of described second group of primary coil L12 continues and flows negative electrode and the first primary coil L11, one end of two utmost point D12, the anode of another termination home court effect pipe Q12 drain electrode and the first reverse isolation diode D13.First negative electrode that continues stream diode D11 connects the negative electrode of the second reverse isolation diode D14, and wherein the first primary coil L11 meets first end and the second primary coil L12 that continues stream diode D11 negative electrode to connect second that end that continues the negative electrode that flows diode D12 be end of the same name.The source electrode of described home court effect pipe Q12 connects the negative pole of rectifier bridge.The negative electrode of the described first reverse isolation diode D13 connects the anode of clamp capacitor C12 one end and the 3rd reverse isolation diode D15, the negative pole of another termination rectifier bridge of described clamp capacitor C12.The negative electrode of the 3rd reverse isolation diode D15 connects the end of the 3rd group of primary coil L13.The drain electrode of another termination assist field effect pipe Q11 of described the 3rd group of primary coil L13 and the positive pole of storage capacitor C13, the negative pole of storage capacitor C13 connects the negative pole of rectifier bridge.The source electrode of described auxiliary field effect transistor Q11 connects the anode of the second reverse isolation diode D14.It is end of the same name that end of the auxiliary switch Q11 that the 3rd group of primary coil L13 connects and the second primary coil L12 connect second that end of negative electrode that continues stream diode D12.
Its operation principle is as follows:
When input voltage is in peak value and when neighbouring, when home court effect pipe and auxiliary field effect transistor conducting, the electric energy after the rectification is by second continue stream diode, second primary coil, the home court effect pipe; Simultaneously also produce voltage at other two primary coils, first primary coil produces voltage and stops electric current by first primary coil; The 3rd primary coil produces the electric energy that voltage is converted to the electric energy of clamp capacitor storage capacitor.For the positive activation type Switching Power Supply,,, form direct current energy by secondary circuit at secondary generation voltage in home court effect pipe conduction period; For inverse-excitation type switch power-supply, become the magnetic energy of transformer at the home court effect pipe same electric energy of crossing second primary coil of conduction period.
When main switch and auxiliary switch by the time, for the positive activation type Switching Power Supply, be stored in the leakage inductance magnetic energy in the transformer this moment, by second continue stream diode, second primary coil, and first isolating diode, to clamp capacitor charging, simultaneously, in the 3rd primary coil, form induced voltage, stop the electric energy of clamp capacitor to discharge to storage capacitor by the three or two isolating diode.Clamp capacitor voltage is raised to suitable voltage like this, makes switch transformer reset to zero point.When not having voltage in the tertiary coil, electric energy on the clamp capacitor is by the 3rd unidirectional isolating diode, second primary coil charges to storage capacitor, for inverse-excitation type switch power-supply, at this moment, the magnetic energy that is stored on the transformer produces voltage on secondary coil, form direct current output by secondary wire.The effect of clamp capacitor and the 3rd primary coil effect are identical with forward power.
When input voltage the voltage trough and near the time, when home court effect pipe and auxiliary field effect transistor conducting, electric energy on the storage capacitor is by auxiliary field effect transistor, second isolating diode, first primary coil, second primary coil and home court effect pipe, (positive and negative sharp power supply is identical) is because the 3rd primary coil produces the electric energy that voltage is converted to the electric energy on the clamp capacitor storage capacitor simultaneously; For anodal formula power supply, at secondary formation voltage, by secondary wire output electric energy; For antipole formula power supply, electric energy is become magnetic energy be stored in the transformer.When auxiliary field effect transistor and home court effect pipe by the time, for the positive activation type Switching Power Supply, be stored in the leakage inductance magnetic energy in the transformer this moment, charge to clamp capacitor by first continue stream diode, first primary coil, second primary coil, second isolating diode, or by second continue stream diode, second primary coil, second isolating diode, charge to clamp capacitor, simultaneously, in the 3rd primary coil, form induced voltage, stop the electric energy of clamp capacitor to discharge to storage capacitor by the 3rd isolating diode.Clamp capacitor voltage is raised to suitable voltage like this, makes switch transformer reset to zero point.When not having voltage in the transformer, electric energy on the clamp capacitor is by the 3rd unidirectional isolating diode, second primary coil charges to storage capacitor, for inverse-excitation type switch power-supply, at this moment, the magnetic energy that is stored on the transformer produces voltage on secondary coil, form direct current output by secondary wire.The effect of clamp capacitor and the 3rd primary coil effect are identical with forward power.The direct supply terminals of the ratio decision input voltage of first primary coil and second primary coil, in general directly supply terminals is low more good more.But consider the fluctuation restriction of output voltage, can not select low, for 220 volts of alternating voltages, generally select 220 volts of direct currents or more than.That is to say that second primary coil is 1: 2 or littler with first number of primary turns ratio.Generally not too big for the clamp capacitor value, guarantee that the switch transformer magnetic core can reset well.
2. specific embodiments is please referring to Fig. 2
The concrete PFC switching power circuit of alternative plan of the present invention comprises a rectifier bridge DB21, an inductance, and wherein inductance has two groups of coils, the first coil L21, second group of coil L22, a field effect transistor Q21, two electric capacity; Filter capacitor C21, storage capacitor C22, four diodes, the first diode D21, the second diode D22, the 3rd diode D23, the 4th diode D23, a field effect transistor.The input termination alternating current of wherein said rectifier bridge, described filter capacitor C21 is attempted by the output of rectifier bridge, the anode of the anode of the described first diode D21 and the second diode D22 connects the positive pole of rectifier bridge output, the negative electrode of a termination second diode D21 of the described first coil L21, the anode of an end the 4th diode D24 of another termination second coil L22 and an end of load circuit; Another termination second diode of the second coil L22 and the negative electrode of the 3rd diode; The anode of the 3rd diode connects the end of the source electrode O21 of field effect transistor, and the drain electrode that field effect transistor is opened connects the negative electrode of storage capacitor C22 positive pole and the 4th diode; The negative pole of storage capacitor C22 is born the negative pole that connects rectifier bridge with the other end on live road.The second coil L22 connects that end of the second diode D22 negative electrode and that end that the first coil L21 connects the first diode D21 negative electrode is an end of the same name, and two coils are same magnetic core.
Its operation principle is as follows:
When input voltage is in peak value and when neighbouring, when the switching tube of load circuit and field effect transistor conducting, electric energy after the rectification produces voltage at second coil simultaneously and stops electric current to be powered to load circuit by second coil by the switching tube powering load of first diode, first coil, load circuit.When the switching tube of load circuit and field effect transistor by the time, be stored in the leakage inductance magnetic energy in the inductance this moment, give storage capacitor C22 charging by first diode, first coil, the 4th diode.
When input voltage the voltage trough and near the time, when the switching tube of load circuit and field effect transistor conducting, storage capacitor C22 electric energy is powered to load circuit by the switching tube of the 3rd diode, second coil, load circuit.When the switching tube of load circuit and field effect transistor by the time, be stored in the leakage inductance magnetic energy in the inductance this moment, by the 4th diode, first coil, storage capacitor C22 charging.
Load circuit can be load circuit or the switching power circuit such as figure three figure four of electron rectifier.
Claims (7)
1, a kind of high-power factor correcting circuit comprises a rectifier bridge DB11, a switch transformer, wherein switch transformer has three groups of primary coils: the first primary coil L11, the second primary coil L12, the 3rd primary coil L13 and one group of secondary coil, two switching tubes: main switch Q12 and auxiliary switch Q11, three electric capacity: filter capacitor C11, storage capacitor C13, clamp capacitor C12, five diodes: first continues flows diode D11, second continues flows diode D12, the first reverse isolation diode D13, the second reverse isolation diode D14, the 3rd reverse isolation diode D15; The input termination AC power of wherein said rectifier bridge, described filter capacitor C11 is attempted by the output of rectifier bridge, the continue anode of stream diode D12 of described first anode and second that continues stream diode D11 connects the positive pole of rectifier bridge output, and the described first primary coil L11 two ends connect first the continue negative electrode of stream two utmost point D12 of stream diode D11 and second that continues respectively; The termination second of described second group of primary coil L12 continues and flows the negative electrode D12 and the first primary coil L11, one end of two utmost points, the anode of another termination main switch Q12 one end and the first reverse isolation diode D13; First negative electrode that continues stream diode D11 connects the negative electrode of the second reverse isolation diode D14 and the end of the first primary coil L11, and wherein the first primary coil L11 connects first and continues that to connect second that end that continues the negative electrode that flows diode D12 be end of the same name for that end of stream diode D11 negative electrode and the second primary coil L12; The negative pole of another termination rectifier bridge of described main switch Q12; The negative electrode of the described first reverse isolation diode D13 connects the anode of clamp capacitor C12 one end and the 3rd reverse isolation diode D15, the negative pole of another termination rectifier bridge of described clamp capacitor C12; The negative electrode of the 3rd reverse isolation diode D15 connects the end of the 3rd group of primary coil L13; The end of another termination auxiliary switch Q11 of described the 3rd group of primary coil L13 and the positive pole of storage capacitor C13, the negative pole of storage capacitor C13 connects the negative pole of rectifier bridge; The anode of another termination second reverse isolation diode D14 of described auxiliary switch Q11; It is end of the same name that end of the auxiliary switch Q11 that the 3rd group of primary coil L13 connects and the second primary coil L12 connect second that end of negative electrode that continues stream diode D12; The first primary coil L11, the second primary coil L12, the 3rd primary coil L13 is same magnetic core.
2, high-power factor correcting circuit according to claim 1, it is characterized in that the second primary coil L12, the 3rd primary coil L13, clamp capacitor C12, second continues flows diode D12, the first reverse isolation diode D13, the 3rd reverse isolation diode D15 has formed the clamper reset circuit, turn-off instantaneous at main switch, on the 3rd primary coil, form the power flow storage capacitor C13 that voltage stops clamp capacitor C12, electric current continues by second and flows diode D12 like this, second group of primary coil L12, the first reverse isolation diode D13 gives clamp capacitor C12 charging, clamp capacitor C12 voltage is raised to desired voltage very soon, makes switch transformer reset to zero point.
3, high-power factor correcting circuit according to claim 1, it is characterized in that the first primary coil L11, the second primary coil L12 form the current blocking circuit, its effect is to be in peak value and when neighbouring when input voltage, when main switch and auxiliary switch conducting, electric current makes the primary coil of winning form voltage and stops the electric energy on the storage capacitor C13 to give circuit supply by second primary coil.
4, high-power factor correcting circuit according to claim 1, it is characterized in that the second primary coil L12, the 3rd primary coil L13, clamp capacitor C12, the 3rd reverse isolation diode D15 form charging circuit, when the main switch conducting, because electric current is by second primary coil, make to produce voltage, allow clamp capacitor C12 give storage capacitor C13 charging at the 3rd primary coil.
5, a kind of high-power factor correcting circuit comprises a rectifier bridge DB21, an inductance, wherein inductance has two groups of coils: the first coil L21, the second coil L22, a switching tube Q21, two electric capacity: filter capacitor C21, storage capacitor C22, four diodes: the first diode D21, the second diode D22, the 3rd diode D23, the 4th diode D24, a load circuit; The input termination alternating current of wherein said rectifier bridge, described filter capacitor C21 is attempted by the output of rectifier bridge, the anode of the anode of the described first diode D21 and the second diode D22 connects the positive pole of rectifier bridge output, the negative electrode of a termination second diode D21 of the described first coil L21, the anode of an end the 4th diode D24 of another termination second coil L22 and an end of load circuit; Another termination second diode D22 of the second coil L22 and the negative electrode of the 3rd diode D23; The anode of the 3rd diode D23 connects the end of switching tube O21, another termination storage capacitor C22 positive pole that switching tube O21 opens and the negative electrode of the 4th diode D24; The negative pole of storage capacitor C22 connects the negative pole of rectifier bridge with the other end of load circuit; The second coil L22 connects that end of the second diode D22 negative electrode and that end that the first coil L21 connects the first diode D21 negative electrode is an end of the same name, and two groups of coils are same magnetic core.
6, high-power factor correcting circuit according to claim 5, it is characterized in that the inductance first coil L21, the second inductance coil L22, formed the current blocking circuit, its effect is to be in peak value and when neighbouring when input voltage, when load switch pipe and switching tube Q21 conducting, electric current makes inductance second coil form the voltage powering load on the voltage prevention storage capacitor C22 by inductance first coil.
7, high-power factor correcting circuit according to claim 5, it is characterized in that first diode, second diode, first group of coil L21 of inductance, second group of coil L22 of inductance, the 4th diode, storage capacitor C22 form charging circuit, its effect is when the load switch pipe ends, electric current is given energy storage C22 charging by the first diode D21, the inductance first coil L21, the 4th diode D24, or electric current is given energy storage C22 charging by the second diode D22, the inductance second coil L22, the 4th diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810083553A CN101527503A (en) | 2008-03-08 | 2008-03-08 | High-power factor correcting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810083553A CN101527503A (en) | 2008-03-08 | 2008-03-08 | High-power factor correcting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101527503A true CN101527503A (en) | 2009-09-09 |
Family
ID=41095236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810083553A Pending CN101527503A (en) | 2008-03-08 | 2008-03-08 | High-power factor correcting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101527503A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739046A (en) * | 2012-06-29 | 2012-10-17 | 卢金树 | Auxiliary power supply circuit without electrolytic capacitor |
| WO2013159259A1 (en) * | 2012-04-23 | 2013-10-31 | Lin Fuyong | Single-stage high-power-factor switching power supply |
| CN104040858A (en) * | 2012-04-23 | 2014-09-10 | 林福泳 | Single-stage High-power-factor Power Source |
| CN111835208A (en) * | 2020-08-14 | 2020-10-27 | 深圳市航嘉驰源电气股份有限公司 | Switching power supply with PFC circuit |
| CN108040400B (en) * | 2018-01-12 | 2023-07-18 | 美智光电科技股份有限公司 | LED driving circuit and LED lamp |
-
2008
- 2008-03-08 CN CN200810083553A patent/CN101527503A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159259A1 (en) * | 2012-04-23 | 2013-10-31 | Lin Fuyong | Single-stage high-power-factor switching power supply |
| CN104040858A (en) * | 2012-04-23 | 2014-09-10 | 林福泳 | Single-stage High-power-factor Power Source |
| CN102739046A (en) * | 2012-06-29 | 2012-10-17 | 卢金树 | Auxiliary power supply circuit without electrolytic capacitor |
| CN102739046B (en) * | 2012-06-29 | 2015-07-15 | 卢金树 | Auxiliary power supply circuit without electrolytic capacitor |
| CN108040400B (en) * | 2018-01-12 | 2023-07-18 | 美智光电科技股份有限公司 | LED driving circuit and LED lamp |
| CN111835208A (en) * | 2020-08-14 | 2020-10-27 | 深圳市航嘉驰源电气股份有限公司 | Switching power supply with PFC circuit |
| CN111835208B (en) * | 2020-08-14 | 2022-01-04 | 深圳市航嘉驰源电气股份有限公司 | Switching power supply with PFC circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101552546B (en) | Bridgeless power factor circuit correcting circuit system used for critical conduction mode and control method thereof | |
| CN104871421B (en) | Mono-pole switch power supply | |
| CN1808868A (en) | High frequency DC power supply with high power factor | |
| CN101136584B (en) | Switch loss reduced single-stage power factor correcting circuit | |
| CN101958657A (en) | Power supply switching circuit, equipment and alternate control method of power factor correction circuit | |
| CN102281006A (en) | Novel three-level soft switching converter | |
| CN101707441A (en) | Totem-pole bridgeless circuit system and current sampling device | |
| CN100438286C (en) | Dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit | |
| CN107104600B (en) | Modular multilevel converter and electric power electric transformer | |
| CN101821930A (en) | DC transformer | |
| CN104852590B (en) | A kind of new three-level LLC resonance inverter | |
| CN105119516A (en) | Quasi Z-source inverter with high boost gain | |
| CN102882410B (en) | A kind of single-phase seven electrical level inverters | |
| CN109004837A (en) | High voltage flyback converter | |
| CN101527503A (en) | High-power factor correcting circuit | |
| CN104779805A (en) | Phase-shifted full-bridge ZVS convertor with wide load range | |
| CN102412715B (en) | Circuit of restraining reverse spike voltage output of commutation diode | |
| CN102983738A (en) | Primary voltage buffer type full-bridge single-stage power-factor corrector of transformer | |
| CN202424530U (en) | LLC circuit and LLC power supply | |
| CN100517926C (en) | Partial active electrical source power factor correction circuit | |
| CN2854919Y (en) | High frequency switch power circuit | |
| CN102447403B (en) | Three-phase rectifier circuit with low harmonic wave continuous input current | |
| CN102969903B (en) | Retention time for resonance converter extends circuit and method | |
| CN101924481A (en) | PFC (Power Factor Correction) rectifier circuit | |
| CN104967304B (en) | One kind is based on no bridge CUK isolated form Three Phase Power Factor Correction Converters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090909 |