CN106533204B - Resonance type AC DC converter and its control method - Google Patents
Resonance type AC DC converter and its control method Download PDFInfo
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- CN106533204B CN106533204B CN201610910264.XA CN201610910264A CN106533204B CN 106533204 B CN106533204 B CN 106533204B CN 201610910264 A CN201610910264 A CN 201610910264A CN 106533204 B CN106533204 B CN 106533204B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
-
- 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
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a resonance type AC DC converter and its control methods, the AC/DC transfer device includes rectification circuit, resonant transform circuit and control circuit, the rectification circuit and resonant transform circuit series connection, the control circuit detects the output variable of the resonant transform circuit, calculate output error control amount, it is multiplied with the input voltage sampled value of resonant transform circuit, gained product is as reference value, the control circuit uses the input current sampled value of the reference value and the resonant transform circuit, it calculates and generates driving signal and control turning on and off for switching device in the resonant transformation device.Technical solution of the present invention realizes the Sofe Switch of switching device in resonant transform circuit, improves the power density of circuit.Resonant transform circuit carries out PFC simultaneously and output is adjusted, and circuit uses single step arrangement, can greatly reduce cost, can be applied to require in frivolous efficient power supply product.
Description
Technical field
The present invention is related power factor correction technology, and in particular to single stage type power factor conversion device.
Background technique
About AC/DC transfer device, it is known that usually using such technical solution in technology, as shown in Figure 1, including
Rectification circuit 11, preceding stage DC-DC translation circuit 12 and rear class DC-DC conversion circuit 13, the input terminal of the rectification circuit 11
IN receives exchange input AC, and rectifies to it, and output is provided to the input terminal terminal of preceding stage DC-DC translation circuit 12
MID1, the input terminal terminal MID2 of the output connection most rear class DC-DC conversion circuit 13 of preceding stage DC-DC translation circuit 12, after
The output end of grade DC-DC conversion circuit 13 is output terminal OUT, provides output voltage Vout.Preceding stage DC-DC translation circuit 12 is real
Existing PFC makes the electric current on terminal MID1 in steamed bun wave, to make the electric current on input terminal IN in sine, meets
The requirement of PFC.Preceding stage DC-DC translation circuit 12 is typically chosen in boost type (Boost) converter, makes output electricity
Pressure is fixed value Vmid2, and input current Imid1 is in steamed bun wave.Rear class DC-DC conversion circuit 13 converts input voltage Vmid2
At required voltage Vout or electric current Iout.
AC/DC transfer device in known technology uses two-level configuration, and preceding stage DC-DC translation circuit 12 is to open firmly
Powered-down road is interfered between switching loss and circuit, and switching frequency cannot be set as very high frequency, and which greatly limits the grades
The power density of circuit is unfavorable for realizing circuit miniaturization.And the circuit structure of two-stage type is more using device, and cost is opposite
It is higher.
Summary of the invention
The present invention exactly thinks and in this, provides a kind of resonance type AC DC converter and its control method, use are whole
Apply the scheme of controlled resonant converter after stream bridge, this single step arrangement simplifies circuit, reduces costs, and through the invention
Control method realize circuit in switching device Sofe Switch.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
Resonance type AC DC converter, including rectification circuit and resonant transform circuit, the input of the rectification circuit
End receives exchange input, and output end is connected with the input terminal of the resonant transform circuit, and the rectification circuit realizes that exchange is straight
Rheology is changed, and the resonant transform circuit realizes PFC and adjusts output, the resonance type AC DC converter
Further include:
One output control circuit detects the output variable of the resonant transform circuit, calculates output error control amount；
One input voltage sample circuit detects the input voltage of the resonant transform circuit, output-input voltage sampled value；
The output error control amount is multiplied by one mlultiplying circuit with the input voltage sampled value, and exports input electricity
Flow control reference value；
One input control circuit, detects the input current of the resonant transform circuit, and receives the input current control
Reference value calculates current error control amount；
Circuit occurs for one driving signal, receives the current error control amount, generates driving signal, the driving signal control
Make turning on and off for switching device in the resonant transform circuit.
In a preferred embodiment of the invention, the rectification circuit is the full-bridge rectification electricity being made of switching device diode
Road.
In a preferred embodiment of the invention, the resonant transform circuit is full-bridge LLC resonant transform circuit.
In a preferred embodiment of the invention, the resonant transform circuit is half-bridge logical link control (LLC) resonant translation circuit.
In a preferred embodiment of the invention, the output control circuit includes output voltage sampling circuit and voltage control
Ring, the output voltage sampling circuit sample the output voltage of the resonant transform circuit, and export output voltage sampled value, institute
Stating voltage control loop is an adjuster, receives the output voltage sampled value and output voltage control reference value, calculates output
Control errors amount.
In a preferred embodiment of the invention, the output control circuit includes output current sampling circuit and the first electric current
Control ring, the output current sampling circuit samples the output electric current of the resonant transform circuit, and exports output current sample
Value, the current regulator are an adjuster, receive the output current sampling data and output current control reference, calculate
Output error control amount.
In a preferred embodiment of the invention, the input control circuit includes input current sample circuit and the second electric current
Control ring, the input current of resonant transformation device described in the input current sampling circuit samples export input current sampled value,
Second current regulator is an adjuster, receives the input current control reference value and the input current sampled value,
Calculate error originated from input control amount.
In a preferred embodiment of the invention, the adjuster is proportional and integral controller.
The present invention also provides a kind of control method of resonance type AC DC converter, the resonance type AC direct current becomes
Changing device includes rectification circuit and resonant transform circuit, and the input terminal of the rectification circuit receives exchange input, output end and
The input terminal of the resonant transform circuit connects, and the control method includes:
The output variable for detecting the resonant transform circuit calculates output error control amount；
The output error control amount is multiplied with the input voltage sampled value of resonant transform circuit, and gained product is as input
Current control reference；
The input current for detecting the resonant transform circuit obtains input current sampled value；
Reference value is controlled using input current and input current sampled value calculates and generates driving signal；
Turning on and off for switching device in the resonant transformation device is controlled using the driving signal.
In a preferred embodiment of the invention, the output variable is output electric current or output voltage.
Beneficial effect, the present invention realize the power factor to AC/DC transfer device by single-stage resonant transform circuit
Correction and output variable control, circuit structure is simple, and the control method that the present invention designs, which realizes in resonant transform circuit, to be switched
The Sofe Switch of device so as to further increase the switching frequency of switching device, and then reduces the magnetic cores such as transformer or inductance
The volume of element achievees the purpose that reduce whole device volume, improves the power density of device, form frivolous appearance.
For allow invention features described above and advantage can be clearer and more comprehensible, special embodiment below, and cooperate institute's accompanying drawings make
Detailed description are as follows.
Detailed description of the invention
Fig. 1 is known technology the circuit diagram of middle AC/DC transfer device.
Fig. 2 is technical solution of the present invention circuit diagram.
Fig. 3 is technical solution of the present invention control circuit schematic diagram.
Fig. 4 is that example diagram is embodied in control circuit one of the present invention.
Fig. 5 is control circuit another specific embodiment figure of the present invention.
Fig. 6 is that example diagram is embodied in rectification circuit of the present invention and resonant transform circuit one.
Fig. 7 is rectification circuit of the present invention and resonant transform circuit another specific embodiment figure.
Specific embodiment
To keep purpose and the technical solution of the embodiment of the present invention clearer, below in conjunction with the attached of the embodiment of the present invention
Figure, is clearly and completely described the technical solution of the embodiment of the present invention.Obviously, described embodiment is of the invention
A part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of being not necessarily to creative work.
The (if present)s such as heretofore described " first ", " second ", " third " are used between similar element carry out
Difference, and be not necessarily and describe specific order or sequence temporally.It is appreciated that these terms used in this way are suitable
It is interchangeable in the environment of, so that the implementation of theme described herein is, for example, can be different with the order illustrated from those
Order or operated with other order described herein.In addition, all possible places, in diagram and embodiment
It is to represent same or like component using component/component/step of identical label.
The embodiment of the present invention provides a kind of resonance type AC DC converter and its control method, is become using single-stage resonance
It changes and is electrically connected to after rectification circuit, while realizing that PFC and output variable are adjusted, simplify circuit structure, together
The Sofe Switch of switching device in Shi Shixian resonant transform circuit.
It is illustrated in figure 2 technical solution of the present invention circuit block diagram, the resonance type AC DC converter includes rectification
The input terminal IN of circuit 21 and resonant transform circuit 22, the rectification circuit receives AC-input voltage Vin, carries out AC-DC
After rectifying conversion, the input terminal MID of direct current Vmid to the resonant transform circuit is provided, resonant transform circuit 22 receives directly
Galvanic electricity Vmid provides output Vout to output terminal OUT, resonant transform circuit 22 after carrying out PFC and output adjusting
Guarantee that the electric current Imid on terminal MID is in steamed bun wave, so that the electric current Iin on terminal IN realizes PFC in sine.
Fig. 3 is control circuit block diagram of the present invention, as shown in figure 3, joined control circuit in the circuit of fig. 2
34, the control circuit includes:
One output control circuit 341 detects the output variable on the output terminal OUT of the resonant transform circuit 32, meter
Calculate output error control amount S1；
One input voltage sample circuit 342 detects the voltage on the input terminal MID of the resonant transform circuit 32
Vmid, output-input voltage sampled value S2；
The output error control amount is multiplied with the input voltage sampled value, and exports input by one mlultiplying circuit 343
Current control reference S3；
One input control circuit 344, the output control circuit 344 include described in input current sample circuit 3441 detects
The input current of resonant transform circuit exports input current sampled value S4, further includes a current regulator 3442, the electric current control
Ring 3442 processed receives the input current control reference value S3 and input current sampled value S4, calculates current error control
Measure S5；
Circuit 345 occurs for one driving signal, receives the current error control amount S5, generates driving signal PWM, the drive
Dynamic signal PWM controls turning on and off for switching device in the resonant transform circuit.
Currently preferred, the current regulator 3442 is an adjuster, more specifically, being that proportional integration is adjusted
Device, but the present invention is not limited thereto, any adjuster with regulating calculation can be applied herein.
For the present invention when input voltage vin reduces from peak value near zero-crossing point, PFC function requires input current just
It is corresponding to reduce zero passage, using the high gain characteristics of parallel resonance at low currents, can be improved by reducing switching frequency
Step-up ratio between outputting and inputting, to maintain the constant of output voltage.
Be illustrated in figure 4 the another specific embodiment figure of input control circuit of the present invention, in the present embodiment, other component with
Circuit shown in Fig. 3 is identical, and output control circuit 441 includes output current sampling circuit 4411 and current regulator 4412, institute
State the output electric current of 4411 sampling harmonic translation circuit of current sampling circuit, 42 output end OUT, output output current sampling data
S02, the current regulator 4412 receive output current sampling data S02 and output current reference value Iref, calculate output and miss
Poor control amount S1.
Currently preferred, the current regulator 4412 is an adjuster, more specifically, being that proportional integration is adjusted
Device, but the present invention is not limited thereto, any adjuster with regulating calculation can be applied herein.
It is illustrated in figure 5 a specific implementation example diagram of input control circuit of the present invention, in the present embodiment, other component and figure
Circuit shown in 3 is identical, and output control circuit 541 includes output voltage sampling circuit 5411 and voltage control loop 5412, described
The output voltage of 5411 sampling harmonic translation circuit of voltage sampling circuit, 52 output end OUT exports output voltage sampled value S01,
The voltage control loop 5412 receives output voltage sampled value S01 and output voltage reference value Vref, calculates output error control
Amount S1 processed.
Currently preferred, the voltage control loop 5412 is an adjuster, more specifically, being that proportional integration is adjusted
Device, but the present invention is not limited thereto, any adjuster with regulating calculation can be applied herein.
As shown in fig. 6, for a specific embodiment of rectification circuit of the present invention and resonance circuit, in the present embodiment, input electricity
It presses Vin for industrial frequency AC input, generally network voltage, is connected to input terminal IN, provide input for rectification circuit 61, rectify
Circuit 61 is rectifier bridge DR1~DR4Realize AC-DC transformation；Rectification circuit 61 and resonant transform circuit 62 are connected by terminal MID
Connection, resonant transform circuit 62 are a half-bridge resonant transform circuit, wherein inductance Lr, capacitor CrWith inductance LmConstitute LLC resonant ring
Section；Switch S1, S2With capacitor C1, C2High-frequency inverter circuit is constituted, DC voltage is become high-frequency ac amount；Diode DF1, DF2
High-frequency alternating current by resonant network, is rectified into end by the semibridge system rectification circuit that resonance circuit is constituted with capacitor CF1, CF2
Direct current needed for sub- OUT.Output filter capacitor Co and load Ro are connected in parallel on output terminal OUT.During power frequency half-wave,
When input voltage vin reduces from peak value near zero-crossing point, PFC function requires input current also accordingly to reduce zero passage just,
It, can be by reducing switching frequency, between raising is output and input using the high gain characteristics of parallel resonance at low currents
Step-up ratio, to maintain the constant of output voltage.
As shown in fig. 7, for the another specific embodiment of rectification circuit of the present invention and resonance circuit, in the present embodiment, input
Voltage Vin is industrial frequency AC input, generally network voltage, is connected to input terminal IN, provides input for rectification circuit 71, whole
Current circuit 71 is that the full bridge rectifier that diode DR1~DR4 is constituted realizes AC-DC transformation；Rectification circuit 71 and resonant transformation
Circuit 72 is connected in series by terminal MID, and resonant transform circuit 72 is full-bridge resonant transform circuit, wherein inductance Lr, capacitor Cr
With transformer T, LLC resonance link is constituted；S1, S2, S3, S4 constitute high-frequency inverter circuit, and DC voltage is become high-frequency ac
Amount；DF1, DF2, DF3, DF4 constitute the semibridge system rectification circuit of resonance circuit, the high-frequency ac electric rectification for passing through resonant network
At direct current needed for terminal OUT.Output filter capacitor Co and load Ro are connected in parallel on output terminal OUT.
The present invention has extraordinary effect: being directly realized by PFC using controlled resonant converter and exports adjusting
Function.It can apply and be inputted, in the power conversion of direct current output in exchange, especially require small in size, high-efficient power supply, fill
In electric appliance and Related product.Such as need electric car charger etc.；Or in high-power industrial power, it is such as electrolysed electroplating power supply
Deng.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any technical field
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, thus it is of the invention
Protection scope should be defined by the scope of the appended claims.
Claims (10)
1. resonance type AC DC converter, including rectification circuit and resonant transform circuit, the input terminal of the rectification circuit
Exchange input is received, output end is connected with the input terminal of the resonant transform circuit, and the rectification circuit realizes AC DC
Transformation, the resonant transform circuit realize PFC and adjust output, which is characterized in that the resonance type AC direct current
Converting means further include:
One output control circuit detects the output variable of the resonant transform circuit, calculates output error control amount；
One input voltage sample circuit detects the input voltage of the resonant transform circuit, output-input voltage sampled value；
The output error control amount is multiplied with the input voltage sampled value, and exports input current control by one mlultiplying circuit
Reference value processed；
One input control circuit, detects the input current of the resonant transform circuit, and receives the input current control reference
Value, calculates current error control amount；
Circuit occurs for one driving signal, receives the current error control amount, generates driving signal, and the driving signal controls institute
Turning on and off for switching device in resonant transform circuit is stated,
When exchange input reduces from peak value to zero crossings, the switch frequency of switching device in the resonant transform circuit is reduced
Rate improves the step-up ratio of the resonant transform circuit, maintains the constant of output voltage.
2. resonance type AC DC converter as described in claim 1, which is characterized in that the rectification circuit is by derailing switch
The full bridge rectifier of part diode composition.
3. resonance type AC DC converter as described in claim 1, which is characterized in that the resonant transform circuit is full-bridge
LLC resonant transform circuit.
4. resonance type AC DC converter as described in claim 1, which is characterized in that the resonant transform circuit is half-bridge
LLC resonant transform circuit.
5. resonance type AC DC converter as described in claim 1, which is characterized in that the output control circuit includes defeated
Voltage sampling circuit and voltage control loop out, the output voltage sampling circuit sample the output electricity of the resonant transform circuit
Pressure, and output voltage sampled value is exported, the voltage control loop is an adjuster, receives the output voltage sampled value and output
Voltage controls reference value, calculates output error control amount.
6. resonance type AC DC converter as described in claim 1, which is characterized in that the output control circuit includes defeated
Current sampling circuit and the first current regulator out, the output current sampling circuit sample the output of the resonant transform circuit
Electric current, and export output current sampling data, the current regulator are an adjuster, receive the output current sampling data and defeated
Current control reference out calculates output error control amount.
7. resonance type AC DC converter as described in claim 1, which is characterized in that the input control circuit includes defeated
Enter current sampling circuit and the second current regulator, the input of resonant transform circuit described in the input current sampling circuit samples
Electric current exports input current sampled value, and second current regulator is an adjuster, receives the input current control reference
Value and the input current sampled value, calculate current error control amount.
8. the resonance type AC DC converter as described in claim 5 or 6 or 7, which is characterized in that the adjuster is ratio
Integral controller.
9. the control method of resonance type AC DC converter, the resonance type AC DC converter includes rectification circuit
And resonant transform circuit, the input terminal of the rectification circuit receive exchange input, output end and the resonant transform circuit
Input terminal connection, which is characterized in that the control method includes:
The output variable for detecting the resonant transform circuit calculates output error control amount；
The output error control amount is multiplied with the input voltage sampled value of resonant transform circuit, and gained product is as input current
Control reference value；
The input current for detecting the resonant transform circuit obtains input current sampled value；
Reference value is controlled using input current and input current sampled value calculates and generates driving signal；
Turning on and off for switching device in the resonant transform circuit is controlled using the driving signal, when exchange input is from peak
It is worth to when zero crossings reduction, reduces the switching frequency of switching device in the resonant transform circuit, improve the resonant transformation
The step-up ratio of circuit maintains the constant of output voltage.
10. the control method of resonance type AC DC converter as claimed in claim 9, which is characterized in that the output becomes
Amount is output electric current or output voltage.
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| CN201610910264.XA CN106533204B (en) | 2016-10-19 | 2016-10-19 | Resonance type AC DC converter and its control method |
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| CN201610910264.XA CN106533204B (en) | 2016-10-19 | 2016-10-19 | Resonance type AC DC converter and its control method |
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| TWI691823B (en) * | 2018-02-23 | 2020-04-21 | 台達電子工業股份有限公司 | Power supply device and control method thereof |
| CN112054699A (en) * | 2020-09-16 | 2020-12-08 | 南通大学 | Integrated PCB (printed circuit board) level meltblown electret power supply topology |
| CN115085553B (en) * | 2021-03-16 | 2023-12-22 | 宁德时代新能源科技股份有限公司 | Bidirectional DC/DC converter, control method and device thereof, and storage medium |
| CN115021527B (en) * | 2022-02-22 | 2024-06-21 | 南京航空航天大学 | Control circuit and method of three-phase single-stage electric energy conversion device |
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| CN101014920A (en) * | 2004-06-28 | 2007-08-08 | 国际整流器公司 | High frequency partial boost power factor correction control circuit and method |
| US7283379B2 (en) * | 2005-01-07 | 2007-10-16 | Harman International Industries, Incorporated | Current controlled switch mode power supply |
| CN201134750Y (en) * | 2007-10-08 | 2008-10-15 | 薛晓明 | Single-stage LLC series resonance AC/DC converter |
| US8693213B2 (en) * | 2008-05-21 | 2014-04-08 | Flextronics Ap, Llc | Resonant power factor correction converter |
| CN103023299B (en) * | 2011-09-26 | 2015-05-20 | 南京博兰得电子科技有限公司 | Control method of power factor conversion device |
| CN102801329B (en) * | 2012-08-09 | 2015-05-13 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency and low-loss AC/DC (Alternating Current/Direct Current) power supply circuit and control method thereof |
| US9001539B2 (en) * | 2012-11-19 | 2015-04-07 | Apple Inc. | AC-DC resonant converter that provides high efficiency and high power density |
| CN103904880B (en) * | 2014-03-04 | 2018-02-16 | 深圳博用科技有限公司 | A kind of circuit for correcting part active power factor of input voltage threshold value control |
| CN105515373A (en) * | 2014-10-19 | 2016-04-20 | 曾庆东 | Non-isolation type switch power supply with high-power factor correction |
| CN104486892B (en) * | 2015-01-04 | 2017-05-24 | 安徽工业大学 | Three-phase electrolytic-capacitor-free LED power source topology circuit and control method thereof |
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