CN104716842A - Resonant type single-stage-structure single-switch multi-channel constant current output power-factor correction converter topology and control method thereof - Google Patents

Resonant type single-stage-structure single-switch multi-channel constant current output power-factor correction converter topology and control method thereof Download PDF

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Publication number
CN104716842A
CN104716842A CN201510049983.2A CN201510049983A CN104716842A CN 104716842 A CN104716842 A CN 104716842A CN 201510049983 A CN201510049983 A CN 201510049983A CN 104716842 A CN104716842 A CN 104716842A
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Prior art keywords
current
output
constant current
power factor
resonant
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许建平
刘雪山
杨琦
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Southwest Jiaotong University
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Southwest Jiaotong University
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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
    • H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
    • 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
    • H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • 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
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
    • 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 invention discloses a resonant type single-stage-structure single-switch multi-channel constant current output power-factor correction converter topology and a control method thereof. The principle that a converter secondary-side resonant capacitor is charged and discharged in balance within a power frequency cycle is utilized, so that the characteristic that all output branches are equal in current is achieved. The converter only needs to control the current of any one branch to be constant, and then the constant current output characteristic that all the output branches are equal in current can be achieved. The converter is only provided with an active switch, a magnetic component and 2N-1 resonant capacitors, and then the functions of achieving constant current output of 2N channels and correcting power factors can be achieved at the same time. Compared with a traditional scheme, a circuit provided with the topology has the advantages of high efficiency and low cost, and a high-performance and low-cost resolution scheme is provided for an application needing multi-channel constant current output and power factor correction.

Description

A kind of resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter topology and control method thereof
Technical field
The present invention relates to multiple constant current and export application, especially multi-string LED technical field of constant current drive.
Background technology
LED illumination technology is a kind of novel, clean and efficient modern lighting technology, has the remarkable advantage such as energy-saving and environmental protection and long service life.Although LED efficient energy-saving lighting technology has so many advantage, due to the non-linear of LED luminescence and the sensitiveness to temperature, constant current need be adopted to drive.When therefore using LED illumination, constant-flow driver must be used to provide constant-current supply for LED.Meanwhile, in order to make the harmonic pollution of LED drive circuit to electrical network reach regulation requirement, usually need to adopt power factor correction technology.According to existing technology, drive circuit can adopt two kinds of structures: one is two-layer configuration, first use one-level pfc circuit to change alternating current into bus direct current, the second level re-uses suitable isolated form topology, changes bus direct current into required LED drive current; The second is single step arrangement, directly uses stage circuit, realizes power factor correction simultaneously and provides the requirement of required LED drive current.
At present, in illumination application scenario, as street lamp, large-scale backlight etc., the power grade of single or some LED lamp is completely inadequate, and connection in series-parallel plurality of LEDs must be used just to reach required power grade.But in series parallel structure, because each LED strip voltage-current characteristic is inconsistent, the LED strip causing forward voltage lower is flow through larger current, easily burn the lower LED strip of forward voltage for a long time.In order to realize often going here and there the luminous intensity of LED and thermal effect consistent, just must solve the current balance problem between LED strip.
Existing LED flow equalize technology can be divided into two large class, i.e. active flow equalize technology and passive flow equalize technologies substantially.Active flow equalize technology forms a current regulator by active device and corresponding control circuit, then be cascaded with corresponding LED strip, the electric current of the every paths of LEDs of independent regulation.But active flow equalize technology exists, and circuit components is many, control circuit is complicated and high in cost of production shortcoming.And traditional passive flow equalize technology mainly contains current-sharing transformer formula, capacitor charge and discharge balanced type and LCT-T resonant network formula three class.Wherein, the current-sharing transformer sensibility reciprocal needed for the current share scheme of current-sharing transformer formula is large, and volume is large, and current-sharing low precision and N road export and need N-1 current-sharing transformer, circuit complexity.Although and capacitor charge and discharge balanced type scheme circuit is simple, existing scheme needs prime to provide constant-current source.If LCT-T resonant network formula scheme needs N road constant current output, need N number of LCT-T resonant network, therefore circuit element is many, and volume is large.Meanwhile, these three kinds passive current-sharing modes all need additional one-level circuit of power factor correction to reduce harmonic pollution to electrical network.
Summary of the invention
Circuit topology provided by the invention, overcomes the above shortcoming of existing passive and active flow equalize technology.
The technical solution adopted in the present invention is: adopt the discharge and recharge balance scheme of the secondary resonant capacitance of single step arrangement Single switch multiple constant current output power factor correcting converter to realize the constant current of each output branch road and power factor emendation function simultaneously.Specific practice is:
A kind of resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter, be made up of input rectification circuit DB, input filter circuit F, transformer T, switching tube S, the main circuit formed with secondary resonance and output network (SR/O) and sampling control circuit, a main circuit active switch, a magnetic device and 2N-1 resonant capacitance realize 2N road constant current output and power factor emendation function simultaneously; Export for two-way (i.e. N=2), its topological form is: after rectifying and wave-filtering, connects with switching tube S ground connection afterwards in the former limit of transformer; Secondary connects two output branch roads again after meeting resonant capacitance Cr, the sense of current being controlled two output branch roads by the unilateral conduction of two diode D1 and D2 is contrary each other, makes secondary current two-way flow, thus realizes the discharge and recharge balance of secondary resonant capacitance; The sample output current of arbitrary branch road of controller Con carries out current constant control, utilizes secondary resonant capacitance Cr discharge and recharge equilibrium principle to realize the current constant control of each output branch road.
Like this, utilize transformer secondary leakage inductance and secondary resonant capacitance to carry out resonance, utilize the unilateral conduction of two diodes of transformer secondary two output branch roads to realize the two-way flow of secondary current, thus provide path for the discharge and recharge of secondary resonant capacitance.During stable state, in a switch periods, the discharge and recharge of secondary resonant capacitance balances.Because the stopping direct current of each branch road output capacitance leads to AC characteristic, the electric current flowing through each output branch circuit load is made to be direct current.Again because of secondary resonant capacitance discharge and recharge balance during stable state, equal by the quantity of electric charge of two output branch roads, make the average current flowing through two output branch circuit load in each switch periods equal, therefore achieve each output branch circuit load and flow through equal direct current.Program transformer primary secondary inductance current work is at intermittent conductive pattern or critical conduction mode, and utilize lower loop bandwidth, converter achieves power factor emendation function.The program by controlling the constant output current of a certain output branch road, and then realizes multiple constant current output control.
The present invention also aims to, there is provided a kind of resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter topology control method: adopt the discharge and recharge balance scheme of the secondary resonant capacitance of single step arrangement Single switch multiple constant current output power factor correcting converter to realize the constant current of each output branch road and power factor emendation function simultaneously, the sense of current being controlled two output branch roads by the unilateral conduction of two diode D1 and D2 is contrary each other, make secondary current two-way flow, thus realize the discharge and recharge balance of secondary resonant capacitance; The sample output current of arbitrary branch road of controller (Con) carries out current constant control, utilizes secondary resonant capacitance Cr discharge and recharge equilibrium principle to realize the current constant control of each output branch road.
Compared with prior art, the invention has the beneficial effects as follows:
One, compared with existing passive flow equalize technology, the present invention is single step arrangement, has circuit structure simple, the advantages such as components and parts used are few, and volume is little, and cost is low, control circui is simple;
Two, compared with existing passive flow equalize technology, the present invention is balanced by the discharge and recharge of secondary resonant capacitance, achieves the high accuracy current-sharing of each output branch road, and only need control the constant current of arbitrary branch road output current, can realize the current constant control of each output branch road;
Three, compared with active with existing and passive flow equalize technology, the present invention only needs use magnetic element and an active switch can realize the output of single step arrangement multiple constant current, and has power factor emendation function and higher efficiency simultaneously.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is traditional anti exciting converter realizes the current-sharing of each output branch road circuit topology figure in conjunction with current-sharing transformer.
Fig. 2 is the circuit structure diagram of resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter of the present invention and control method thereof.
Fig. 3 is that the present invention adopts the circuit structure diagram replacing input rectification circuit (DB) without bridge circuit.
The circuit topology figure of Fig. 4 to be the present invention with doubleway output be embodiment.
Fig. 5 is the present invention take doubleway output as embodiment, and inductive current is operated in operation mode circuit diagram during intermittent conductive pattern.
Fig. 6 is the present invention take doubleway output as embodiment, and inductive current is operated in the main time-domain-simulation oscillogram (open loop) of intermittent conductive pattern.
Fig. 7 is resonant mode single step arrangement Single switch two-way constant current output pfc converter topology and control circuit embodiment thereof, and controller realizes discontinuous current mode conduction mode and controls.
Fig. 8 is the simulation result of Fig. 7 embodiment.
Fig. 9 is resonant mode single step arrangement Single switch two-way constant current output pfc converter topology and control circuit embodiment thereof, and controller realizes critical current mode continuous conduction mode and controls.
Figure 10 is the simulation result of Fig. 9 embodiment.
Figure 11 is the resonant mode single step arrangement Single switch four road constant current output circuit topology expanded of the present invention and critical conduction mode control circuit figure thereof.
Figure 12 is the simulation result of Figure 11 embodiment.
Embodiment
Below by concrete example with reference, further detailed description is done to the present invention.
As shown in Figure 5 and Figure 6, when inductive current is operated in intermittent conductive pattern, circuit has four mode.
T in corresponding Fig. 6 of mode one in Mode1: Fig. 5 1period, the switching tube S conducting of this period, input voltage gives the charging of elementary magnetizing inductance, excitation inductance current i lmlinear rising, secondary leakage inductance L kwith secondary resonant capacitance C rthere is resonance.Resonance current i crby diode D 1to output capacitance C 1discharge and be load R 1there is provided direct current, diode D 2turn off owing to bearing reverse voltage, now output capacitance C 2to load R 2electric discharge.As secondary resonance current i crresonance to zero time, mode one terminates.
T in mode two corresponding diagram 6 in Mode2: Fig. 5 2period, switching tube S still conducting, but secondary resonance current i now crresonance to zero, diode D 1zero-current switching, output capacitance C 1to load R 1electric discharge, and diode D 2still bear reverse voltage and turn off, therefore output capacitance C 2continue to load R 2electric discharge.Mode two terminates when switching tube S turns off.
T in mode three corresponding diagram 6 in Mode3: Fig. 5 3period, when mode three starts, switching tube S disconnects, and because the magnetizing inductance of transformer discharges, excitation inductance current reduces, the secondary resonant capacitance C of transformer rby diode D 2electric discharge, diode D 1bear reverse voltage and turn off, output capacitance C 1to load R 1electric discharge.Mode three end when secondary resonance current is reduced to zero.
T in mode four corresponding diagram 6 in Mode4: Fig. 5 4period, now switching tube S still keeps turning off, and magnetizing inductance discharge off, secondary resonance current gets back to zero again, diode D 2zero-current switching.The output capacitance of two branch roads gives respective load discharge respectively.Mode four switching tube S again conducting time terminate.
During stable state, in a switch periods, the two-way flow of secondary current makes secondary resonant capacitance C rdischarge and recharge balances, and realizes the current-sharing of each output branch road with this.
Analysis of simulation result:
Fig. 7 invents for two-way constant current output for this reason, and discontinuous current mode conduction mode controls embodiment, and the output current that controller sampling exports branch road 1 carries out current constant control.Fig. 8 is the simulation waveform of Fig. 7 embodiment, and its simulation parameter is: input voltage V in=120Vac, load resistance R 1=342 Ω, R 2=285 Ω, transformer primary side magnetizing inductance L m=0.5mH, secondary leakage inductance L k=5 μ H, resonant capacitance C r=470nF, output capacitance C 1=C 2=160 μ F.As shown in Figure 8, input current follows the tracks of the change of input voltage, achieves power factor emendation function.Although the load resistance exporting branch road is different, each output branch current is all constant in about 350mA, achieves two-way constant current output and controls.
Fig. 9 invents for two-way constant current output for this reason, and critical current mode continuous conduction mode controls embodiment, and controller is still sampled and exported the output current of branch road 1 and carry out current constant control.Figure 10 is the simulation waveform of Fig. 9 embodiment, and its simulation parameter is: input voltage V in=120Vac, load resistance R 1=342 Ω, R 2=285 Ω, I o1=350mA, transformer primary side magnetizing inductance L m=1mH, secondary leakage inductance L k=10 μ H, resonant capacitance C r=470nF, output capacitance C 1=C 2=160 μ F.As shown in Figure 10, input current follows the tracks of the change of input voltage, achieves power factor emendation function.Although the load resistance exporting branch road is different, each output branch current is all constant in about 350mA, achieves two-way constant current output and controls.
Figure 11 is the resonant mode single step arrangement Single switch four road constant current output converter topology expanded of the present invention and critical conduction mode control circuit thereof.Being constant current by controlling the output current of the first branch road, utilizing secondary three resonant capacitance C r1, C r2with C r3discharge and recharge Balancing relization four tunnel sharing control, and then reach the object of control four road output constant current.Figure 12 is the simulation waveform of Figure 11 embodiment, and its simulation parameter is: input voltage V in=120Vac, load resistance R 1=600 Ω, R 2=500 Ω, R 3=400 Ω, R 2=300 Ω, transformer primary side magnetizing inductance L m=1mH, secondary leakage inductance L k=10uH, resonant capacitance C r1=C r2=C r3=470nF, output capacitance C 1=C 2=160 μ F, the output current I of branch road one o1=200mA.As shown in Figure 12, input current follows the tracks of the change of input voltage, achieves power factor emendation function.Although the load resistance exporting branch road is different, each output branch current is all constant in about 200mA.
To sum up, the proposed by the invention thought utilizing the discharge and recharge equilibrium principle of secondary resonant capacitance to realize flow equalize technology only need use an active switch and a magnetic element, just can solve the shortcoming of existing passive flow equalize technology well.

Claims (6)

1. a resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter topology, be made up of input rectification circuit (DB), input filter circuit (F), transformer (T), switching tube (S), the main circuit formed with secondary resonance and output network (SR/O) and sampling control circuit, it is characterized in that, a main circuit active switch, a magnetic device and 2N-1 resonant capacitance realize 2N road constant current output and power factor emendation function simultaneously; Export for two-way (i.e. N=2), its topological form is: after rectifying and wave-filtering, connects with switching tube S ground connection afterwards in the former limit of transformer; Secondary connects two output branch roads again after meeting resonant capacitance Cr, the sense of current being controlled two output branch roads by the unilateral conduction of two diode D1 and D2 is contrary each other, makes secondary current two-way flow, thus realizes the discharge and recharge balance of secondary resonant capacitance; The sample output current of arbitrary branch road of controller (Con) carries out current constant control, utilizes secondary resonant capacitance Cr discharge and recharge equilibrium principle to realize the current constant control of each output branch road.
2. resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter topology as claimed in claim 1, it is characterized in that, transformer (T) secondary directly connects resonant capacitance C r, and utilize resonant capacitance C rwith the leakage inductance L of transformer (T) kcarry out resonance to reduce leakage inductance loss.
3. resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter topology as claimed in claim 1, it is characterized in that, secondary resonance and output network (SR/O) structure are not limited to doubleway output, realize the current-sharing of 2N road simultaneously export by using 2N-1 resonant capacitance discharge and recharge balance.
4. resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter topology as claimed in claim 1, it is characterized in that, controller (Con) adopts intermittent conductive pattern or critical conduction mode to realize the equal current constant control of each output branch current.
5. resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter topology as claimed in claim 1, the input rectification circuit (DB) in its circuit structure adopts and realizes without bridge circuit.
6. the control method in the resonant mode single step arrangement Single switch multiple constant current output power factor correcting converter topology described in claim 1 or 2 or 3 or 4 or 5, adopt the discharge and recharge balance scheme of the secondary resonant capacitance of single step arrangement Single switch multiple constant current output power factor correcting converter to realize the constant current of each output branch road and power factor emendation function simultaneously, the sense of current being controlled two output branch roads by the unilateral conduction of two diode D1 and D2 is contrary each other, make secondary current two-way flow, thus realize the discharge and recharge balance of secondary resonant capacitance; The sample output current of arbitrary branch road of controller (Con) carries out current constant control, utilizes secondary resonant capacitance Cr discharge and recharge equilibrium principle to realize the current constant control of each output branch road.
CN201510049983.2A 2015-01-30 2015-01-30 Resonant type single-stage-structure single-switch multi-channel constant current output power-factor correction converter topology and control method thereof Pending CN104716842A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106374178A (en) * 2016-09-29 2017-02-01 南京三乐微波技术发展有限公司 Self-adaptive matching device and control method for microwave equipment
CN112019031A (en) * 2019-05-31 2020-12-01 广东美的制冷设备有限公司 Operation control method, circuit, household appliance and computer readable storage medium
CN113179021A (en) * 2021-04-28 2021-07-27 中国民航大学 Two-switch AC/DC LED driving device based on Flyback-Class E converter
CN117411307A (en) * 2023-10-23 2024-01-16 哈尔滨工业大学 Single-stage bridgeless PFC converter suitable for wide intermediate frequency AC/DC power supply system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394699A (en) * 2007-09-18 2009-03-25 通嘉科技股份有限公司 LED driving device
CN101772246A (en) * 2010-02-24 2010-07-07 英飞特电子（杭州）有限公司 Multi-resonance circuit suitable for LED multi-path precise constant current driver
CN101925236A (en) * 2010-08-20 2010-12-22 杭州电子科技大学 Isolated high-power factor flyback type primary-side constant-current control device of LED driver
CN101951716A (en) * 2010-09-30 2011-01-19 杭州电子科技大学 Constant-on-time primary side constant-current control device for LED driver with high power factor
CN201957301U (en) * 2011-01-11 2011-08-31 杭州电子科技大学 Multi-channel light emitting diode (LED) current equalizing drive circuit
CN102186296A (en) * 2011-05-20 2011-09-14 台达能源技术（上海）有限公司 Current balancing circuit
CN103249211A (en) * 2012-02-09 2013-08-14 台达电子企业管理（上海）有限公司 Lighting device, lighting system and lamp

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394699A (en) * 2007-09-18 2009-03-25 通嘉科技股份有限公司 LED driving device
CN101772246A (en) * 2010-02-24 2010-07-07 英飞特电子（杭州）有限公司 Multi-resonance circuit suitable for LED multi-path precise constant current driver
CN101925236A (en) * 2010-08-20 2010-12-22 杭州电子科技大学 Isolated high-power factor flyback type primary-side constant-current control device of LED driver
CN101951716A (en) * 2010-09-30 2011-01-19 杭州电子科技大学 Constant-on-time primary side constant-current control device for LED driver with high power factor
CN201957301U (en) * 2011-01-11 2011-08-31 杭州电子科技大学 Multi-channel light emitting diode (LED) current equalizing drive circuit
CN102186296A (en) * 2011-05-20 2011-09-14 台达能源技术（上海）有限公司 Current balancing circuit
CN103249211A (en) * 2012-02-09 2013-08-14 台达电子企业管理（上海）有限公司 Lighting device, lighting system and lamp

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106374178A (en) * 2016-09-29 2017-02-01 南京三乐微波技术发展有限公司 Self-adaptive matching device and control method for microwave equipment
CN112019031A (en) * 2019-05-31 2020-12-01 广东美的制冷设备有限公司 Operation control method, circuit, household appliance and computer readable storage medium
CN112019031B (en) * 2019-05-31 2021-08-31 广东美的制冷设备有限公司 Operation control method, circuit, household appliance and computer readable storage medium
CN113179021A (en) * 2021-04-28 2021-07-27 中国民航大学 Two-switch AC/DC LED driving device based on Flyback-Class E converter
CN113179021B (en) * 2021-04-28 2022-07-01 中国民航大学 Two-switch AC/DC LED driving device based on Flyback-Class E converter
CN117411307A (en) * 2023-10-23 2024-01-16 哈尔滨工业大学 Single-stage bridgeless PFC converter suitable for wide intermediate frequency AC/DC power supply system
CN117411307B (en) * 2023-10-23 2024-05-24 哈尔滨工业大学 Single-stage bridgeless PFC converter suitable for wide intermediate frequency AC/DC power supply system

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Application publication date: 20150617