CN206332616U - Intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance - Google Patents

Intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance Download PDF

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Publication number
CN206332616U
CN206332616U CN201621380693.2U CN201621380693U CN206332616U CN 206332616 U CN206332616 U CN 206332616U CN 201621380693 U CN201621380693 U CN 201621380693U CN 206332616 U CN206332616 U CN 206332616U
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unit
switch pipe
pfc
output
switching tube
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廖志刚
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Guangdong best medical equipment Co., Ltd
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Guangdong Bestek ECommerce Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies 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

Abstract

The utility model discloses a kind of intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance, it includes:Input rectifying unit;Filter unit;PFC boost unit;LLC isolated converter units, include first switch pipe, second switch pipe, first fly-wheel diode, second fly-wheel diode, transformer, resonant capacitance and discharge resistance, the drain electrode of the first switch pipe is connected to the output end of PFC boost unit, the source electrode of the first switch pipe is connected to the first end of transformer, second end of the transformer connects front end by resonant capacitance, the drain electrode of the second switch pipe is connected to the source electrode of first switch pipe, the source electrode of the second switch pipe connects front end by discharge resistance, the centre tap of the transformer secondary winding as LLC isolated converter units output end.The utility model can improve the PF values of voltage conversion device, improve output voltage quality, and obtain safe and reliable and other effects.

Description

Intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance
Technical field
The utility model is related to voltage conversion circuit, more particularly to a kind of intelligent full-bridge amendment based on PFC Yu LLC resonance Wave voltage change-over circuit.
Background technology
In the prior art, it is otherwise known as travelling insert row by the AC intelligent boost-buck conversion equipments for turning AC, in the device, PFC, LLC and full-bridge amendment wave voltage change-over circuit topology are its Key Circuits, be it is a kind of can realize the circuit of AC-AC conversion, can be with Buck is realized in AC-AC conversion and the function of burning voltage and frequency.But just meaningful formula equipment Market is big by current AC-AC Majority is the topological circuit of non-isolation type, and PF values are low, output voltage quality is low, security reliability is poor.
Utility model content
The technical problems to be solved in the utility model is, in view of the shortcomings of the prior art there is provided one kind based on PFC with The intelligent full-bridge amendment wave voltage change-over circuit of LLC resonance, to improve the PF values of voltage conversion device, improve output voltage matter Amount, and obtain safe and reliable and other effects.
In order to solve the above technical problems, the utility model is adopted the following technical scheme that.
A kind of intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance, it includes:One input rectifying Unit, its input connection power network, for carrying out rectification to line voltage;One filter unit, is connected to input rectifying unit Output end, for being filtered to the voltage that input rectifying unit is exported;One PFC boost unit, is connected to the defeated of filter unit Go out end, the voltage for being exported to filter unit carries out boost conversion;One LLC isolated converter units, include first switch Pipe, second switch pipe, the first fly-wheel diode, the second fly-wheel diode, transformer, resonant capacitance and discharge resistance, described The drain electrode of one switching tube is connected to the output end of PFC boost unit, and the source electrode of the first switch pipe is connected to the of transformer One end, by resonant capacitance with connecting front end, the drain electrode of the second switch pipe is connected to first at the second end of the transformer The source electrode of switching tube, the source electrode of the second switch pipe by discharge resistance with connecting front end, the grid of the first switch pipe It is used for the pwm pulse signal that loads two-way opposite in phase with the grid of second switch pipe, to make the first switch pipe and second Switching tube alternate conduction, the first end of the transformer secondary winding is connected to the anode of the first fly-wheel diode, the transformation Second end of device vice-side winding is connected to the anode of the second fly-wheel diode, and the negative electrode of first fly-wheel diode and second continue With being all connected with rear end, the centre tap of the transformer secondary winding is used as LLC isolated converter units to the negative electrode of stream diode Output end;One D/C voltage filter unit, includes the first electrochemical capacitor, and the positive pole of first electrochemical capacitor is connected to LLC The output end of isolated converter unit, the negative pole connection rear end of first electrochemical capacitor;One inversion reversed phase unit, is connected to The output end of LLC isolated converter units, the inversion reversed phase unit is used to enter the output voltage of LLC isolated converter units Alternating current is exported after row inversion conversion.
Preferably, it is connected with the first pull down resistor between the grid and source electrode of the first switch pipe.
Preferably, it is connected with the second pull down resistor between the grid and source electrode of the second switch pipe.
Preferably, the filter unit includes filter capacitor, and the filter capacitor is connected to the defeated of input rectifying unit Go out between end and front end ground.
Preferably, the PFC boost unit includes boost inductance, the 3rd switching tube, the first commutation diode and second Electrochemical capacitor, the front end of the boost inductance is connected to the output end of filter unit, and the rear end of the boost inductance is connected to The drain electrode of three switching tubes, with connecing front end, the grid of the 3rd switching tube is used to access all the way the source electrode of the 3rd switching tube Pwm control signal, the anode of drain electrode the first commutation diode of connection of the 3rd switching tube, first commutation diode Negative electrode is as the output end of PFC boost unit, and the negative electrode of first commutation diode connects the positive pole of the second electrochemical capacitor, the The negative pole of two electrochemical capacitors is with connecing front end.
Preferably, it is connected with the 3rd pull down resistor between the grid and front end ground of the 3rd switching tube.
Preferably, also include a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe and The grid of 3rd switching tube is connected to MCU control unit, and the MCU control unit is used to distinguishing output pwm signal to the One switching tube, second switch pipe and the 3rd switching tube, to control first switch pipe, second switch pipe and the 3rd switching tube break-make shape State.
Preferably, an AC sampling unit is also included, the AC sampling unit is connected to the defeated of input rectifying unit Enter between end and MCU control unit, the AC sampling unit is used for the voltage and feedback for gathering input rectifying unit AC To MCU control unit.
Preferably, the first sampling resistor is connected between the source electrode and front end ground of the 3rd switching tube, the described 3rd opens The source electrode for closing pipe is connected to MCU control unit, makes MCU control unit gather the 3rd switching tube by first sampling resistor The electric signal of source electrode.
Preferably, a D/C voltage sampling unit is also included, the D/C voltage sampling unit includes be sequentially connected in series Two sampling resistors and the 3rd sampling resistor, the front end of second sampling resistor are connected to the output of LLC isolated converter units End, the rear end of the 3rd sampling resistor is connected to MCU control unit, by second sampling resistor and the 3rd sampling resistor And make the electric signal of MCU control unit collection LLC isolated converter unit output ends.
In the disclosed intelligent full-bridge amendment wave voltage change-over circuit based on PFC and LLC resonance of the utility model, using defeated Enter rectification unit to carry out after rectification line voltage, then unit filtering and output ripple DC voltage after filtering, utilize afterwards PFC boost unit carries out boosting processing to pulsating dc voltage, and in LLC isolated converter units, first switch pipe, second open Guan Guan, resonant capacitance, leakage inductance and primary side magnetizing inductance the composition LLC resonance circuits of discharge resistance and transformer primary side, and in LLC Electric energy is transmitted to the secondary coil of transformer in the state conversion process of resonance circuit, passes through the first fly-wheel diode and second Fly-wheel diode is rectified into unidirectional ripple level, by changing the turn ratio of transformer primary vice-side winding, can adjust output electricity The height of pressure, and then realize boosting or step-down conversion.Based on said structure, the utility model not only realizes the isolation of voltage Transmission, and then the PF values of step-up/down conversion equipment are improved, also improve output voltage quality so that voltage conversion process is more Plus it is safe and reliable.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model full-bridge amendment wave voltage change-over circuit.
Fig. 2 is the circuit theory diagrams of AC sampling unit in the utility model preferred embodiment.
Fig. 3 is the circuit theory diagrams of MCU control unit in the utility model preferred embodiment.
Embodiment
The utility model is described in more detail with reference to the accompanying drawings and examples.
The utility model discloses a kind of intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance, with reference to Shown in Fig. 1 to Fig. 3, it includes:
One input rectifying unit 10, its input connection power network, for carrying out rectification to line voltage;
One filter unit 20, is connected to the output end of input rectifying unit 10, for what is exported to input rectifying unit 10 Voltage is filtered;
One PFC boost unit 30, is connected to the output end of filter unit 20, for entering to the voltage that filter unit 20 is exported Row boost conversion;
One LLC isolated converters unit 40, includes first switch pipe Q6, second switch pipe Q7, the first fly-wheel diode D6, the second sustained diode 5, transformer T1, resonant capacitance C4 and discharge resistance R2B, the first switch pipe Q6 drain electrode connect The output end of PFC boost unit 30 is connected to, the source electrode of the first switch pipe Q6 is connected to transformer T1 first end, the change Depressor T1 the second end is by resonant capacitance C4 connections front end, and the drain electrode of the second switch pipe Q7 is connected to first switch pipe Q6 source electrode, the source electrode of the second switch pipe Q7 is by discharge resistance R2B connections front end, the grid of the first switch pipe Q6 Pole and second switch pipe Q7 grid are used for the pwm pulse signal for loading two-way opposite in phase, to make the first switch pipe Q6 With second switch pipe Q7 alternate conductions, the first end of the transformer T1 vice-side windings is connected to the sun of the first sustained diode 6 Pole, the second end of the transformer T1 vice-side windings is connected to the anode of the second sustained diode 5, the pole of the first afterflow two Pipe D6 negative electrode and the negative electrode of the second sustained diode 5 with being all connected with rear end, the centre tap of the transformer T1 vice-side windings It is used as the output end of LLC isolated converters unit 40;
One D/C voltage filter unit 50, includes the first electrochemical capacitor C3, the first electrochemical capacitor C3 positive pole connection In the output end of LLC isolated converters unit 40, the negative pole of the first electrochemical capacitor C3 is with connecting rear end;
One inversion reversed phase unit 70, is connected to the output end of LLC isolated converters unit 40, the inversion reversed phase unit 70 Alternating current is exported after carrying out inversion conversion for the output voltage to LLC isolated converters unit 40.
In above-mentioned full-bridge amendment wave voltage change-over circuit, line voltage is carried out after rectification using input rectifying unit 10, Unit 20 is filtered and output ripple DC voltage after filtering again, and Rectified alternating current is pressed into using PFC boost unit 30 afterwards Row boosting is handled, in LLC isolated converters unit 40, first switch pipe Q6, second switch pipe Q7, resonant capacitance C4, electric discharge Resistance R2B and leakage inductance and primary side magnetizing inductance the composition LLC resonance circuits of transformer T1 primary sides, and in the shape of LLC resonance circuits Electric energy is transmitted to transformer T1 secondary coil in state transfer process, passes through the first sustained diode 6 and the pole of the second afterflow two Pipe D5 is rectified into unidirectional ripple level, by changing the turn ratio of the former vice-side windings of transformer T1, can adjust output voltage Just, so realize boosting or step-down conversion.Based on said structure, the isolation that the utility model not only realizes voltage is passed It is defeated, and then the PF values of step-up/down conversion equipment are improved, also improve output voltage quality so that voltage conversion process is more It is safe and reliable.
In the present embodiment, in order to improve first switch pipe Q6 and second switch pipe Q7 switching speeds, the first switch pipe The first pull down resistor R25 is connected between Q6 grid and source electrode.Connected between the grid and source electrode of the second switch pipe Q7 There is the second pull down resistor R26.
As a kind of preferred embodiment, the filter unit 20 includes filter capacitor C1, and the filter capacitor C1 is connected to Between the output end and front end ground of input rectifying unit 10.
Further, the PFC boost unit 30 includes boost inductance L2, the 3rd switching tube Q5, the pole of the first rectification two Pipe D1 and the second electrochemical capacitor C2, the boost inductance L2 front end are connected to the output end of filter unit 20, the boosting electricity Sense L2 rear end is connected to the 3rd switching tube Q5 drain electrode, and with connecing front end, the described 3rd opens the source electrode of the 3rd switching tube Q5 Closing pipe Q5 grid is used to access pwm control signal all the way, and the drain electrode of the 3rd switching tube Q5 connects the first commutation diode D1 anode, the negative electrode of the first commutation diode D1 is used as the output end of PFC boost unit 30, and the pole of the first rectification two Pipe D1 negative electrode connects the second electrochemical capacitor C2 positive pole, and the second electrochemical capacitor C2 negative pole is with connecing front end.
In above-mentioned PFC boost unit 30, when monitoring that C1 exports half-wave alternating voltage, PFC enters boost mode, to carry High AC turn AC intelligently step-down conversion topologies circuit PF values, after boosting by the filtered voltages of C2 be 400V.Specific boosting Principle is as follows:When Q5 is turned on, the boosted inductance L2 of electric current, Q5 to GND the formation loop on C1, boost inductance L2 storage energy; When Q5 is turned off, the induced electromotive force more much higher than input voltage can be formed on boost inductance, induced electromotive force is through continued flow tube D1 Carry out rectification after formed unidirectional pulse voltage give again C2 electric capacity enter filtering, be filtered into 400V DC voltage.Wherein Q5 is root The ON time that the input AC sine wave adopted according to MCU control unit 80 changes to increase or reduce Q5 so that electric current and electricity Pressure phase reaches unanimously to improve PF values.
In the present embodiment, in order to improve the 3rd switching tube Q5 switching speed, the grid of the 3rd switching tube Q5 is with before End is connected with the 3rd pull down resistor R22 between ground.
As a kind of preferred embodiment, the present embodiment also includes a MCU control unit 80, the grid of the first switch pipe Q6 The grid of pole, second switch pipe Q7 grid and the 3rd switching tube Q5 is connected to MCU control unit 80, the MCU controls Unit 80 is used to distinguish output pwm signal to first switch pipe Q6, second switch pipe Q7 and the 3rd switching tube Q5, to control first Switching tube Q6, second switch pipe Q7 and the 3rd switching tube Q5 on off operating modes.Further, the MCU control unit 80 includes Single-chip microcomputer U1 and its peripheral circuit.
For the ease of monitoring the electric signal of AC, the present embodiment also includes an AC sampling unit 90, the exchange Sampling unit 90 is connected between the input of input rectifying unit 10 and MCU control unit 80, the AC sampling unit 90 For gathering the voltage of the AC of input rectifying unit 10 and feeding back to MCU control unit 80.
On the concrete composition of the AC sampling unit 90, the AC sampling unit 90 includes amplifier U9B, the fortune Two inputs for putting U9B are connected to the input of input rectifying unit 10 by current-limiting resistance respectively, the amplifier U9B's Output end is connected to MCU control unit 80.
For the ease of being gathered in real time to electric current, is connected between the source electrode and front end ground of the 3rd switching tube Q5 One sampling resistor R2A, the source electrode of the 3rd switching tube Q5 is connected to MCU control unit 80, by first sampling resistor R2A and make MCU control unit 80 gather the 3rd switching tube Q5 source electrodes electric signal.
As a kind of preferred embodiment, in order to be acquired to DC side electric signal, the present embodiment also includes a D/C voltage Sampling unit 60, the D/C voltage sampling unit 60 includes the second sampling resistor R13 and the 3rd sampling resistor being sequentially connected in series R15, the second sampling resistor R13 front end are connected to the output end of LLC isolated converters unit 40, the 3rd sampling electricity Resistance R15 rear end is connected to MCU control unit 80, is made by the second sampling resistor R13 and the 3rd sampling resistor R15 The electric signal of the output end of the collection LLC isolated converters of MCU control unit 80 unit 40.
On Converting Unit, the inversion reversed phase unit 70 includes being opened by the 4th switching tube Q1, the 5th switching tube Q2, the 6th Close the inverter bridge of pipe Q3 and the 7th switching tube Q4 compositions, the grid of the 4th switching tube Q1, the 5th switching tube Q2 grid, the Six switching tube Q3 grid and the 7th switching tube Q4 grid are connected to MCU control unit 80, are controlled by the MCU single Member 80 and control the 4th switching tube Q1, the 5th switching tube Q2, the 6th switching tube Q3 and the 7th switching tube Q4 on or off, to make The output AC voltage of inversion reversed phase unit 70.
In above-mentioned inversion reversed phase unit 70, by the filtered DC voltages of C3 through Q1, load, Q4 formation loops to load Power supply forms first half period power frequency level;Second half period power frequency level forms loop by Q2, load, Q3, so A complete power frequency amendment alternating current wave pressure is formed in load.The pwm signal of control chip U1 outputs is through driving electricity The GATE poles of PWM1H, PWM1L, PWM2H, PWM2L to Q1, Q2, Q3, Q4 are sent out behind road respectively.Phase in inversion phase inverter It is operated with frequency according to the pattern of control chip inner setting.
Intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance disclosed in the utility model, it is compared to existing Have for technology, first, the utility model has high PF values, realizes power network and isolates with output end, security is very high, together When, output voltage, and fixed output frequency can be automatically adjusted in input full voltage range, again, output voltage is To correct ripple output, automatic shaping function is pressed with to alternating current, in addition, the utility model scheme contains voltage and current sample electricity Road, can anti-surge voltage and electric current.
The above is the utility model preferred embodiment, is not limited to the utility model, all in this practicality Modification, equivalent or improvement made in new technical scope etc., should be included in the model that the utility model is protected In enclosing.

Claims (10)

1. a kind of intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance, it is characterised in that include:
One input rectifying unit, its input connection power network, for carrying out rectification to line voltage;
One filter unit, is connected to the output end of input rectifying unit, for being filtered to the voltage that input rectifying unit is exported Ripple;
One PFC boost unit, is connected to the output end of filter unit, and the voltage for being exported to filter unit carries out boosting and turned Change;
One LLC isolated converter units, include first switch pipe, second switch pipe, the first fly-wheel diode, the second afterflow two Pole pipe, transformer, resonant capacitance and discharge resistance, the drain electrode of the first switch pipe are connected to the output end of PFC boost unit, The source electrode of the first switch pipe is connected to the first end of transformer, before the second end of the transformer is connected by resonant capacitance End ground, the drain electrode of the second switch pipe is connected to the source electrode of first switch pipe, and the source electrode of the second switch pipe passes through electric discharge Resistance connection front end, the grid of the first switch pipe and the grid of second switch pipe are used to load two-way opposite in phase Pwm pulse signal, to make the first switch pipe and second switch pipe alternate conduction, the first end of the transformer secondary winding The anode of the first fly-wheel diode is connected to, the second end of the transformer secondary winding is connected to the sun of the second fly-wheel diode Pole, the negative electrode of first fly-wheel diode and the negative electrode of the second fly-wheel diode with being all connected with rear end, the transformer secondary The centre tap of winding as LLC isolated converter units output end;
One D/C voltage filter unit, includes the first electrochemical capacitor, and the positive pole of first electrochemical capacitor is connected to LLC isolation changes The output end of exchange unit, the negative pole connection rear end of first electrochemical capacitor;
One inversion reversed phase unit, is connected to the output end of LLC isolated converter units, and the inversion reversed phase unit is used for LLC The output voltage of isolated converter unit exports alternating current after carrying out inversion conversion.
2. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 1 based on PFC Yu LLC resonance, its feature exists In being connected with the first pull down resistor between the grid and source electrode of the first switch pipe.
3. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 1 based on PFC Yu LLC resonance, its feature exists In being connected with the second pull down resistor between the grid and source electrode of the second switch pipe.
4. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 1 based on PFC Yu LLC resonance, its feature exists In the filter unit includes filter capacitor, and the filter capacitor is with being connected to output end and the front end of input rectifying unit Between.
5. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 1 based on PFC Yu LLC resonance, its feature exists In the PFC boost unit includes boost inductance, the 3rd switching tube, the first commutation diode and the second electrochemical capacitor, described The front end of boost inductance is connected to the output end of filter unit, and the rear end of the boost inductance is connected to the leakage of the 3rd switching tube Pole, with connecing front end, the grid of the 3rd switching tube is used to access pwm control signal all the way the source electrode of the 3rd switching tube, The anode of drain electrode the first commutation diode of connection of 3rd switching tube, the negative electrode of first commutation diode is used as PFC The output end of boosting unit, and the positive pole of negative electrode the second electrochemical capacitor of connection of first commutation diode, the second electrochemical capacitor Negative pole with connecing front end.
6. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 5 based on PFC Yu LLC resonance, its feature exists In being connected with the 3rd pull down resistor between the grid and front end ground of the 3rd switching tube.
7. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 5 based on PFC Yu LLC resonance, its feature exists In also including a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe and the 3rd switching tube Grid is connected to MCU control unit, and the MCU control unit is used to distinguish output pwm signal to first switch pipe, second Switching tube and the 3rd switching tube, to control first switch pipe, second switch pipe and the 3rd switching tube on off operating mode.
8. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 7 based on PFC Yu LLC resonance, its feature exists In also including an AC sampling unit, the AC sampling unit is connected to the input of input rectifying unit and MCU is controlled Between unit, the AC sampling unit is used to gather the voltage of input rectifying unit AC and feeds back to MCU control unit.
9. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 7 based on PFC Yu LLC resonance, its feature exists In being connected with the first sampling resistor between the source electrode and front end ground of the 3rd switching tube, the source electrode of the 3rd switching tube connects MCU control unit is connected to, makes MCU control unit gather the telecommunications of the 3rd switching tube source electrode by first sampling resistor Number.
10. the intelligent full-bridge amendment wave voltage change-over circuit as claimed in claim 7 based on PFC Yu LLC resonance, its feature exists In, also include a D/C voltage sampling unit, the D/C voltage sampling unit include the second sampling resistor for being sequentially connected in series and 3rd sampling resistor, the front end of second sampling resistor is connected to the output end of LLC isolated converter units, and the described 3rd adopts The rear end of sample resistance is connected to MCU control unit, makes MCU controls single by second sampling resistor and the 3rd sampling resistor The electric signal of member collection LLC isolated converter unit output ends.
CN201621380693.2U 2016-12-15 2016-12-15 Intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance Active CN206332616U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106787793A (en) * 2016-12-15 2017-05-31 广东百事泰电子商务股份有限公司 Intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106787793A (en) * 2016-12-15 2017-05-31 广东百事泰电子商务股份有限公司 Intelligent full-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance
WO2018107618A1 (en) * 2016-12-15 2018-06-21 广东百事泰电子商务股份有限公司 Pfc and llc resonance-based smart full bridge correction wave voltage conversion circuit

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Address after: No.358 Baotian 1st Road, Tiegang community, Xixiang street, Baoan District, Shenzhen City, Guangdong Province

Patentee after: Guangdong best medical equipment Co., Ltd

Address before: 518000 east part of the third floor, no.258, Baotian 1st Road, Tiegang community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province

Patentee before: Guangdong BESTEK E-commerce Co.,Ltd.