CN206060576U - A kind of high power AC DC transfer circuit - Google Patents
A kind of high power AC DC transfer circuit Download PDFInfo
- Publication number
- CN206060576U CN206060576U CN201621128530.5U CN201621128530U CN206060576U CN 206060576 U CN206060576 U CN 206060576U CN 201621128530 U CN201621128530 U CN 201621128530U CN 206060576 U CN206060576 U CN 206060576U
- Authority
- CN
- China
- Prior art keywords
- voltage
- connects
- switching tube
- resistance
- optocoupler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
A kind of high power AC DC transfer circuit, by switching tube Q1, Q2, Q3, the primary coil of Q4 and high frequency transformer T1 is configured to a H bridge switch circuits, switching tube Q1, Q4 is logical by the control of the first high-frequency square-wave signal, it is disconnected, switching tube Q2, Q3 is logical by the control of the second high-frequency square-wave signal, it is disconnected, the phase place of the first high-frequency square-wave signal is contrary each other with the phase place of the second high-frequency square-wave signal, so as to the output voltage to high voltage rectifier QL carries out inversion, by the frequency for changing high-frequency square-wave signal, the secondary voltage of high frequency transformer can be changed, make the secondary voltage of high frequency transformer stable.This circuit structure can cancel the filter capacitor of the outfan for being connected in parallel on high voltage rectifier QL, in inversion pressure reduction, electrical network has current direction high frequency transformer all the time, the input current aperiodicity spike of electrical network occurs, input current is smoother, higher harmonic components are restrained effectively, there is voltage stabilizing function to the secondary voltage of high frequency transformer in addition.
Description
Technical field
This utility model is related to a kind of high power AC-DC transfer circuit, and it is straight that the circuit is included convert alternating current
The rectification unit for flowing electricity and the pressure unit that blood pressure lowering is carried out to the high voltage direct current after rectification.
Background technology
Existing powerful ac-dc conversion circuit, the source of welding current circuit such as in DC welding machine, generally comprises
Commutator and capacitive filter, the effect of capacitive filter are the straight pulse free of waveform after making rectification, due to commutation diode
The energy storage of non-linear and filter capacitor act on so that input current is a periodicity spike that the time is very short, peak value is very high
Electric current, carries out Fourier analyses to the input current of this deformity and understands, it except containing in addition to fundamental wave, also containing abundant high order
Harmonic component, triple-frequency harmonics particularly therein are especially prominent, and this not only brings many harm to public electric wire net, and can increase
Big input current is lost in transmission；Respective specified is made for this relevant department, it is necessary to such powerful exchange-straight
Stream translation circuit carries out PFC, suppresses higher harmonic components, limits the distortion level of input current.Existing power
The method of factor correcting mainly has two big class of PPFC and APFC.This two classes power factor school
Positive method can all increase exchanges-manufacturing cost of DC transfer circuit.
The content of the invention
The technical problems to be solved in the utility model is to provide a kind of high power AC-DC transfer circuit, and the circuit takes
Disappeared filter capacitor, it is not necessary to increases circuit of power factor correction, but remain to suppress higher harmonic components and make the direct current of output
Voltage waveform is straight.
The technical scheme of technical problem that this utility model is solved is, a kind of high power AC-DC transfer circuit, its bag
Include：The high voltage rectifier QL of rectification is carried out to civil power, the high voltage direct current that high voltage rectifier is exported is transformed into into low-voltage DC
Pressure unit, it is characterized in that, described pressure unit includes switching tube Q1, Q2, Q3, Q4, high frequency transformer T1, switching tube
The colelctor electrode of Q1 connects the positive pole of high voltage direct current, and the emitter stage of switching tube Q1 connects one end of high frequency transformer T1 primary coils, opens
The colelctor electrode for closing pipe Q2 connects the emitter stage of switching tube Q1, and the emitter stage of switching tube Q2 meets the negative pole of high voltage direct current, switching tube Q3
Colelctor electrode connect the positive pole of high voltage direct current, the emitter stage of switching tube Q3 connects the other end of high frequency transformer T1 primary coils, opens
The colelctor electrode for closing pipe Q4 connects the emitter stage of switching tube Q3, and the emitter stage of switching tube Q4 connects the negative pole of high voltage direct current, high frequency transformation
Device T1 secondary coils are connected with the input of low-voltage rectifier, and the outfan of low-voltage rectifier exports a low-voltage dc voltage uo,
The grid of switching tube Q1 and switching tube Q4 is applied with the grid of the first high-frequency square-wave signal, switching tube Q2 and switching tube Q3 and is applied with
Second high-frequency square-wave signal, the switching tube Q2 and switching tube Q3 cut-offs when switching tube Q1 and switching tube Q4 is turned on, as switching tube Q1
Switching tube Q2 and switching tube Q3 conductings when ending with switching tube Q4, the first described high-frequency square-wave signal and the second high frequency square wave letter
Number exported by a voltage controlled oscillator, voltage controlled oscillator is controlled by a voltage comparator, and low-voltage rectifier is exported by voltage comparator
A low-voltage dc voltage uo and setting voltage ug be compared, when low-voltage dc voltage uo be more than setting voltage ug when, voltage
Control voltage uk of comparator output reduces the frequency of voltage controlled oscillator output signal, reduces low-voltage dc voltage uo, instead
It is as the same.
The characteristics of this utility model is, the primary coil structure of described switching tube Q1, Q2, Q3, Q4 and high frequency transformer T1
Become a H bridge switch circuits, the phase place of the phase place of the first high-frequency square-wave signal and the second high-frequency square-wave signal is each other conversely, when opening
Close switching tube Q2, Q3 cut-offs when pipe Q1, Q4 are turned on, switching tube Q2, Q3 conducting when switching tube Q1, Q4 end, so as to high pressure
The output voltage of commutator QL carries out inversion, by the frequency for changing high-frequency square-wave signal, can change the secondary of high frequency transformer
Voltage, makes the secondary voltage of high frequency transformer stable.The circuit structure of the present invention can be cancelled and be connected in parallel on the defeated of high voltage rectifier QL
Go out the filter capacitor at end, electrical network has current direction high frequency transformer all the time in inversion pressure reduction, the input current of electrical network without
Periodicity spike occurs, and input current is smoother, restrained effectively higher harmonic components, in addition to the secondary of high frequency transformer
Step voltage has voltage stabilizing function.
Description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the circuit theory diagrams of comparator and voltage controlled oscillator in Fig. 1.
Specific embodiment
In conjunction with description of the drawings specific embodiment of the present utility model.
A kind of high power AC-DC transfer circuit, which includes：The high voltage rectifier QL of rectification is carried out to civil power, by height
The high voltage direct current of pressure commutator output is transformed into the pressure unit of low-voltage DC, it is characterized in that, described pressure unit bag
Switching tube Q1, Q2, Q3, Q4 are included, the colelctor electrode of high frequency transformer T1, switching tube Q1 meets the positive pole of high voltage direct current, switching tube Q1
Emitter stage connect one end of high frequency transformer T1 primary coils, the colelctor electrode of switching tube Q2 connects the emitter stage of switching tube Q1, switchs
The emitter stage of pipe Q2 connects the negative pole of high voltage direct current, and the colelctor electrode of switching tube Q3 connects the positive pole of high voltage direct current, switching tube Q3's
Emitter stage connects the other end of high frequency transformer T1 primary coils, and the colelctor electrode of switching tube Q4 connects the emitter stage of switching tube Q3, switch
The emitter stage of pipe Q3 connects the negative pole of high voltage direct current；High frequency transformer T1 secondary coils are connected with the input of low-voltage rectifier,
The outfan of low-voltage rectifier exports a low-voltage dc voltage uo, and the grid of switching tube Q1 and switching tube Q4 is applied with the first high frequency
The grid of square-wave signal, switching tube Q2 and switching tube Q3 is applied with the second high-frequency square-wave signal, as switching tube Q1 and switching tube Q4
Switching tube Q2 and switching tube Q3 cut-offs during conducting, when switching tube Q1 and switching tube Q4 ends, switching tube Q2 and switching tube Q3 leads
Logical, described switching tube Q1, Q2, Q3, Q4 is igbt（IGBT）.
High frequency transformer T1 secondary coils have a centre cap, one terminating diode D5's of high frequency transformer T1 secondary coils
Anode, the anode of another terminating diode D6 of high frequency transformer T1 secondary coils, the negative electrode of diode D5 and the moon of diode D6
Pole is connected, the positive pole of the negative electrode of diode D5 for low-voltage rectifier outfan, the centre cap of high frequency transformer T1 secondary coils
For the negative pole of low-voltage rectifier outfan, the centre cap ground connection of high frequency transformer T1 secondary coils.
The first described high-frequency square-wave signal and the second high-frequency square-wave signal are exported by a voltage controlled oscillator, voltage controlled oscillator
Circuit structure as shown in Fig. 2 voltage controlled oscillator includes time-base integrated circuit IC1, audion T1, audion T2, audion T3,
The emitter stage of audion T1 and audion T2 connects working power V+, and audion T1 is connected with the base stage of audion T2, audion
The base stage of T1 connects the colelctor electrode of audion T1, and the colelctor electrode of audion T1 connects control voltage uk by resistance R9, audion T1's
Colelctor electrode connects the pin 7 of time-base integrated circuit IC1, and the colelctor electrode of audion T1 connects time-base integrated circuit IC1's by resistance R10
Pin 6 and pin 2, the pin 2 of time-base integrated circuit IC1 are grounded by electric capacity C1, the pin of time-base integrated circuit IC1 4 and are drawn
Foot 8 connects working power V+, and the pin 1 of time-base integrated circuit IC1 is grounded, and the pin 3 of time-base integrated circuit IC1 passes through resistance R11
The base stage of audion T3 is connect, the colelctor electrode of audion T3 connects working power V+ by resistance R12, and the emitter stage of audion T3 connects
Ground.Model NE555 of time-base integrated circuit.
The operation principle of voltage controlled oscillator is：Time-base integrated circuit IC1, resistance R10, electric capacity C1 constitute a square wave oscillation
Device, audion T1, audion T2, resistance R9 constitute a voltage/current translation circuit, collector current and the control of audion T2
Voltage uk is related, and when control voltage uk is raised, the collector current of audion T2 declines, under the frequency of oscillation of square-wave oscillator
Drop；When control voltage uk declines, the collector current of audion T2 rises, and the frequency of oscillation of square-wave oscillator rises；When basis set
Pin 3 into IC circuit 1 exports the first high-frequency square-wave signal J1, and audion T3, resistance R11 and resistance R12 constitute a phase inverter,
The colelctor electrode of audion T3 exports the phase of the second high-frequency square-wave signal J2, the first high-frequency square-wave signal and the second high-frequency square-wave signal
Position is contrary；The output signal frequency scope of voltage controlled oscillator is 10KHZ-150KHZ.
Above-mentioned voltage controlled oscillator function can also add a phase inverter come real with the electric voltage/frequency converter of LM331 series
Existing, input termination control voltage uk of electric voltage/frequency converter, the outfan of electric voltage/frequency converter connect the input of phase inverter
End, the outfan of electric voltage/frequency converter export the first high-frequency square-wave signal, and the outfan of phase inverter exports the second high frequency square wave
Signal.
Due to having high voltage, the first high-frequency square-wave signal J1 and the second high-frequency square-wave signal J2 switch tubes on switching tube
Control is realized by way of coupling；The mode of coupling can be coupled using pulse transformer, and photoelectric coupling may also be employed.
The line construction of photoelectric coupling is that the first high-frequency square-wave signal J1 connects the anode of the light emitting diode of optocoupler GE1, light
The negative electrode of the light emitting diode of coupling GE1 connects the anode of the light emitting diode of optocoupler GE4, the negative electrode of the light emitting diode of optocoupler GE4
It is grounded by resistance R15, the emitter stage of the phototriode of optocoupler GE1 connects the grid of switching tube Q1, the phototriode of optocoupler GE4
The emitter stage of pipe connects the grid of switching tube Q4；Second high-frequency square-wave signal J2 connects the anode of the light emitting diode of optocoupler GE2, optocoupler
The negative electrode of the light emitting diode of GE2 connects the anode of the light emitting diode of optocoupler GE3, and the negative electrode of the light emitting diode of optocoupler GE3 leads to
Resistance R16 ground connection is crossed, the emitter stage of the phototriode of optocoupler GE2 connects the grid of switching tube Q2, the phototriode of optocoupler GE3
Emitter stage connect the grid of switching tube Q3.
The positive pole of high voltage rectifier QL outfans connects the anode of diode D7, and the negative electrode of diode D7 connects height by electric capacity C2
The negative pole of pressure commutator QL outfans, the colelctor electrode of the phototriode of optocoupler GE1 connect the moon of diode D7 by resistance R21
Pole, the colelctor electrode of the phototriode of optocoupler GE2 connect the negative electrode of diode D7, the phototriode of optocoupler GE3 by resistance R22
Colelctor electrode the negative electrode of diode D7 is connect by resistance R23, the colelctor electrode of the phototriode of optocoupler GE4 is connect by resistance R24
The negative electrode of diode D7；Diode D7, electric capacity C2 loops are filtered to high voltage rectifier QL output ripple voltages, are switching tube
Q1, Q2, Q3, Q4 provide grid current, due to the pulsating current in grid current very little, therefore diode D5, electric capacity C2 loops
Also very little, can ignore compared with the electric current in high voltage rectifier QL.
Pulse transformer coupling circuit structure be：Pulse transformer is four, the first pulse transformer and the 4th pulse
The first polar curve circle of transformator is input into the secondary coil of the first high-frequency square-wave signal, the first pulse transformer and the 4th pulse transformer
It is connected respectively to the first polar curve circle of the grid and emitter stage of switching tube Q1, Q4, the second pulse transformer and the 3rd pulse transformer
The secondary coil for being input into the second high-frequency square-wave signal, the second pulse transformer and the 3rd pulse transformer is connected respectively to switching tube
The grid and emitter stage of Q2, Q3.
Described control voltage uk is produced by a voltage comparator, the circuit of voltage comparator as shown in Fig. 2 voltage ratio compared with
Device includes operational amplifier A 1, operational amplifier A 2, is connected to resistance between the inverting input and outfan of operational amplifier A 1
R5, one end of the anti-phase input terminating resistor R4 of operational amplifier A 1, the other end of resistance R4 are grounded by resistance R2, resistance R4
The other end positive pole of low-voltage rectifier outfan, the homophase input termination potentiometer W1 of operational amplifier A 1 are met by resistance R1
Cursor slide, one end of potentiometer W1 connects working power V+, the other end ground connection of potentiometer W1 by resistance R3；Operational amplifier A 2
Inverting input the outfan of operational amplifier A 1, the inverting input and outfan of operational amplifier A 2 are connect by resistance R6
Between be connected to resistance R7, the in-phase input end of operational amplifier A 2 is grounded by resistance R8, and the outfan of operational amplifier A 2 is defeated
Go out control voltage uk.
The operation principle of voltage comparator is：Resistance R1, R2 are carried out to the low-voltage direct output voltage uo of low-voltage rectifier
Partial pressure, resistance R3, potentiometer W1 provide a setting voltage ug, and operational amplifier A 1, resistance R4, resistance R5 constitute a differential operational
Circuit, when the partial pressure value of output voltage uo is more than setting voltage ug, the output voltage of operational amplifier A 1 is reduced, output voltage
When the partial pressure value of uo is less than setting voltage ug, the output voltage of operational amplifier A 1 is raised；Operational amplifier A 2 and resistance R6, R7
A see-saw circuit is constituted, anti-phase amplification is carried out to the output voltage of operational amplifier A 1.
Working power V+ and the working power that working power V- is operational amplifier, working power V+ is time-base integrated circuit
The working power of IC1.Working power V+ and working power V- by civil power blood pressure lowering, rectifying and wave-filtering, voltage stabilizing and obtain, its output
Electric current very little, with high voltage rectifier QL output electric current compared with can ignore.
In addition to reduce the ripple of low-voltage direct output voltage, be provided with low-voltage rectifier output loop inducer GL and
The positive pole of the output voltage uo of the one termination low-voltage rectifier of electric capacity C, inducer GL, the other end of inducer GL pass through electric capacity C
Ground connection, one end output voltage uo ' of inducer GL.
Operation principle of the present utility model is：The induced voltage of high frequency transformer is proportional with frequency, changes first
The frequency of high-frequency square-wave signal and the second high-frequency square-wave signal can change the induced voltage of high frequency transformer；When low-voltage rectifier
When output voltage uo declines, control voltage uk of voltage comparator output declines, the first high-frequency square-wave signal and the second high frequency side
The frequency of ripple signal is raised, and raises low-voltage rectifier output voltage；When the output voltage uo of low-voltage rectifier rises, voltage
Control voltage uk of comparator output rises, and the frequency of the first high-frequency square-wave signal and the second high-frequency square-wave signal declines, and makes low
The output voltage of pressure commutator is reduced；So that low-voltage rectifier output voltage stabilization is in a setting value.Due to the first high frequency
The opposite in phase of square-wave signal and the second high-frequency square-wave signal, inversion pressure reduction mesohigh commutator QL have all the time electric current to
High frequency transformer stream enters so that occurred by the input current aperiodicity spike of electrical network, input current is smoother, effectively presses down
Higher harmonic components are made.
Claims (4)
1. a kind of high power AC-DC transfer circuit, which includes：The high voltage rectifier QL of rectification is carried out to civil power, by high pressure
The high voltage direct current of commutator output is transformed into the pressure unit of low-voltage DC, it is characterized in that, described pressure unit includes
Switching tube Q1, Q2, Q3, Q4, the colelctor electrode of high frequency transformer T1, switching tube Q1 meet the positive pole of high voltage direct current, switching tube Q1
Emitter stage connect one end of high frequency transformer T1 primary coils, the colelctor electrode of switching tube Q2 connects the emitter stage of switching tube Q1, switchs
The emitter stage of pipe Q2 connects the negative pole of high voltage direct current, and the colelctor electrode of switching tube Q3 connects the positive pole of high voltage direct current, switching tube Q3's
Emitter stage connects the other end of high frequency transformer T1 primary coils, and the colelctor electrode of switching tube Q4 connects the emitter stage of switching tube Q3, switch
The emitter stage of pipe Q4 connects the negative pole of high voltage direct current, and high frequency transformer T1 secondary coils are connected with the input of low-voltage rectifier,
The outfan of low-voltage rectifier exports a low-voltage dc voltage uo, and the grid of switching tube Q1 and switching tube Q4 is applied with the first high frequency
The grid of square-wave signal J1, switching tube Q2 and switching tube Q3 is applied with the second high-frequency square-wave signal J2, the first high-frequency square-wave signal
Phase place it is anti-phase each other with the phase place of the second high-frequency square-wave signal, the first described high-frequency square-wave signal and the second high frequency square wave letter
Number exported by a voltage controlled oscillator, voltage controlled oscillator is controlled by a voltage comparator, and low-voltage rectifier is exported by voltage comparator
A low-voltage dc voltage uo and setting voltage ug be compared, when low-voltage dc voltage uo be more than setting voltage ug when, voltage
Control voltage uk of comparator output reduces the frequency of voltage controlled oscillator output signal, so that low-voltage dc voltage uo drops
Low, vice versa.
2. high power AC-DC transfer circuit according to claim 1, is characterized in that, described voltage controlled oscillator bag
The emitter stage for including time-base integrated circuit IC1, audion T1, audion T2, audion T3, audion T1 and audion T2 connects work
Power supply V+, audion T1 are connected with the base stage of audion T2, and the base stage of audion T1 connects the colelctor electrode of audion T1, audion
The colelctor electrode of T1 connects control voltage uk by resistance R9, and the colelctor electrode of audion T1 connects the pin 7 of time-base integrated circuit IC1, and three
The colelctor electrode of pole pipe T1 connects the pin 6 and pin 2 of time-base integrated circuit IC1 by resistance R10, and time-base integrated circuit IC1's draws
Foot 2 is grounded by electric capacity C1, and the pin 4 and pin 8 of time-base integrated circuit IC1 connect working power V+, time-base integrated circuit IC1's
Pin 1 is grounded, and the pin 3 of time-base integrated circuit IC1 connects the base stage of audion T3, the colelctor electrode of audion T3 by resistance R11
Working power V+, the grounded emitter of audion T3 are connect by resistance R12；Model NE555 of time-base integrated circuit.
3. high power AC-DC transfer circuit according to claim 1, is characterized in that, described voltage comparator bag
Operational amplifier A 1, operational amplifier A 2 are included, resistance R5 between the inverting input and outfan of operational amplifier A 1, is connected to, is transported
One end of the anti-phase input terminating resistor R4 of amplifier A1 is calculated, the other end of resistance R4 is grounded by resistance R2, and resistance R4's is another
One end connects the positive pole of low-voltage rectifier outfan by resistance R1, and the homophase input of operational amplifier A 1 terminates the cunning of potentiometer W1
Arm, one end of potentiometer W1 connect working power V+, the other end ground connection of potentiometer W1 by resistance R3；Operational amplifier A 2 it is anti-
Phase input connects the outfan of operational amplifier A 1 by resistance R6, between the inverting input and outfan of operational amplifier A 2
Resistance R7 is connected to, the in-phase input end of operational amplifier A 2 is grounded by resistance R8, the outfan output control of operational amplifier A 2
Voltage uk processed.
4. high power AC-DC transfer circuit according to claim 1, is characterized in that, the first high-frequency square-wave signal J1
Control with the second high-frequency square-wave signal J2 switch tubes Q1, Q2, Q3, Q4 is realized by way of photoelectric coupling；Photoelectric coupling
Line construction be that the first high-frequency square-wave signal J1 connects the anode of the light emitting diode of optocoupler GE1, the light-emitting diodes of optocoupler GE1
The negative electrode of pipe connects the anode of the light emitting diode of optocoupler GE4, and the negative electrode of the light emitting diode of optocoupler GE4 is grounded by resistance R15,
The emitter stage of the phototriode of optocoupler GE1 connects the grid of switching tube Q1, and the emitter stage of the phototriode of optocoupler GE4 connects switch
The grid of pipe Q4；Second high-frequency square-wave signal J2 connects the anode of the light emitting diode of optocoupler GE2, the light emitting diode of optocoupler GE2
Negative electrode connect optocoupler GE3 light emitting diode anode, the negative electrode of the light emitting diode of optocoupler GE3 is grounded by resistance R16, light
The emitter stage of the phototriode of coupling GE2 connects the grid of switching tube Q2, and the emitter stage of the phototriode of optocoupler GE3 connects switching tube
The grid of Q3；The positive pole of high voltage rectifier QL outfans connects the anode of diode D7, and the negative electrode of diode D7 is connect by electric capacity C2
The negative pole of high voltage rectifier QL outfans, the colelctor electrode of the phototriode of optocoupler GE1 connect the moon of diode D7 by resistance R21
Pole, the colelctor electrode of the phototriode of optocoupler GE2 connect the negative electrode of diode D7, the phototriode of optocoupler GE3 by resistance R22
Colelctor electrode the negative electrode of diode D7 is connect by resistance R23, the colelctor electrode of the phototriode of optocoupler GE4 is connect by resistance R24
The negative electrode of diode D7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621128530.5U CN206060576U (en) | 2016-10-18 | 2016-10-18 | A kind of high power AC DC transfer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621128530.5U CN206060576U (en) | 2016-10-18 | 2016-10-18 | A kind of high power AC DC transfer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206060576U true CN206060576U (en) | 2017-03-29 |
Family
ID=58364029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621128530.5U Expired - Fee Related CN206060576U (en) | 2016-10-18 | 2016-10-18 | A kind of high power AC DC transfer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206060576U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533219A (en) * | 2016-10-18 | 2017-03-22 | 丁毅 | High power AC-DC conversion circuit |
-
2016
- 2016-10-18 CN CN201621128530.5U patent/CN206060576U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533219A (en) * | 2016-10-18 | 2017-03-22 | 丁毅 | High power AC-DC conversion circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105024560A (en) | Automatic conversion device of alternating current power supply | |
| CN204179959U (en) | A kind of inverse-excitation type switch power-supply | |
| CN103647448B (en) | Integrated step-down-flyback type high power factor constant current circuit and device | |
| CN203327305U (en) | Bridge-free PFC plus T type three-level inversion frequency-conversion light modulator | |
| CN206100548U (en) | Electrical power generating system based on ARM control system realizes drive of single -stage PFCLED | |
| CN111431394A (en) | Novel step-down single-phase three-level bridgeless PFC converter system | |
| CN203387399U (en) | Low-standby power consumption active power factor correction module | |
| CN206060576U (en) | A kind of high power AC DC transfer circuit | |
| CN102810986B (en) | A kind of series topology LED switch power circuit | |
| US20230208279A1 (en) | Active diode circuit and ac/dc power conversion circuit | |
| CN201319691Y (en) | Ballast for electricity-saving lamp | |
| CN206135430U (en) | Miniature photovoltaic grid -connected inverter | |
| CN209497396U (en) | A kind of AC-DC circuit that power switch is preposition | |
| CN104682762A (en) | Low-leakage-current grid-connected inverter | |
| CN106686826A (en) | Led lighting power supply circuit | |
| CN106602898A (en) | Welding power supply for DC electric welding machine | |
| CN206060568U (en) | The source of welding current of DC welding machine | |
| CN203482447U (en) | Primary side feedback single-stage PFC output zero-ripple circuit | |
| CN113489363B (en) | Bidirectional H6 photovoltaic grid-connected converter and modulation method thereof | |
| CN203896194U (en) | Switch power supply | |
| CN115441757A (en) | Five-level PWM rectifier and power supply equipment | |
| CN108683345A (en) | A kind of double Buck/Boost current transformers of three-phase modified based on SiC diodes | |
| CN106533219A (en) | High power AC-DC conversion circuit | |
| CN209881671U (en) | Single-inductor double-Boost bridgeless PFC converter | |
| CN208707547U (en) | A kind of double Buck/Boost current transformers of three-phase modified based on SiC diode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170329 Termination date: 20201018 |