CN106026665B - A kind of novel three level frequency multiplication LLC resonant converter - Google Patents
A kind of novel three level frequency multiplication LLC resonant converter Download PDFInfo
- Publication number
- CN106026665B CN106026665B CN201610480373.2A CN201610480373A CN106026665B CN 106026665 B CN106026665 B CN 106026665B CN 201610480373 A CN201610480373 A CN 201610480373A CN 106026665 B CN106026665 B CN 106026665B
- Authority
- CN
- China
- Prior art keywords
- switching tube
- switch pipe
- switch
- capacitance
- moment
- 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.)
- Active
Links
Classifications
-
- 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
- H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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
Abstract
A kind of novel three level frequency multiplication LLC resonant converter, including sequentially connected input derided capacitors, switch bridge arm, resonant cavity, transformer and current rectifying and wave filtering circuit；Input derided capacitors are made of two capacitances being connected in series with, and the other end of two capacitances is connect with the positive and negative anodes of power supply respectively；Switching bridge arm is sequentially connected in series by the hourglass source electrode of four switching tubes with body diode or parallel connection outside diode, hourglass source electrode positioned at the switching tube at switch bridge arm both ends is connected with the positive and negative anodes of power supply respectively, and the intermediate connection point of intermediate two switching tubes is connected with the intermediate connection point of two capacitances；Resonant cavity is sequentially connected in series by resonant inductance, resonant capacitance and static exciter inductance, the resonant inductance other end is connected with the intermediate connection point of first switch pipe and second switch pipe, and the static exciter inductance other end is connected with the intermediate connection point of third switching tube and the 4th switching tube；Transformer secondary is connected with the input terminal of current rectifying and wave filtering circuit；The present invention sends out wave by rationally designing the driving of switching tube, realizes switch tube voltage stress clamp, while having achieved the effect that resonant cavity power device frequency multiplication works.
Description
Technical field
The present invention relates to a kind of controlled resonant converters, and in particular to a kind of novel three level frequency multiplication LLC resonant converter.
Background technology
Controlled resonant converter is high with switching frequency, switching loss is small, efficient, light weight, small, EMI noise is small, opens
Close the advantages that stress is small.There is LLC resonant converter primary side switch pipe easily to realize that full-load range ZVS, secondary diode are easily real
Existing ZCS, resonant inductance and transformer easily realize the advantages that magnetic integrates, are widely used in recent years.Meanwhile it is high defeated to solve
Primary switch pipe high voltage stress problem when entering voltage application, three level are introduced into LLC converters.Three traditional level
LLC resonant converter needs draw is restricted to input voltage half to realize into Clamp-on diodes by switch tube voltage stress, in this way
The switching tube of relative low voltage specification can be selected.The introducing of Clamp-on diodes of Dan increases cost, while circuit is more complex.Separately
Outside, it is limited by semiconductor device switch loss and driving circuit, relatively low (usual tens kHz of LLC resonance circuit working frequencies
To 200 kHz), still there is certain constraint for magnetic device (the resonance transformer, inductance) miniaturization in circuit.
Invention content
In order to solve the above-mentioned problems of the prior art, the present invention provides a kind of novel three level frequency multiplication LLC resonance change
Parallel operation makes full use of switching tube in topological circuit in parallel by the control to each switching tube in converter during control
Diode realizes switch tube both end voltage Clamp-on, achievees the purpose that reduce switch tube voltage stress；With traditional three-level LLC
Circuit topology is compared, and the circuit topological structure fewer than traditional three-level LLC circuit Clamp-on diodes of Du Li, the circuit exist
Circuit structure is simplified to a certain extent, reduces power device；Compared with traditional LLC circuit topologies, the circuit resonance chamber
Working frequency is twice of switching tube switching frequency, and under identical switching frequency, magnetic device can be with twice of frequency work
Make, so as to further decrease magnetic device volume, be advantageously implemented the high frequency of product, planarization, miniaturization, from whole
Cost is reduced on body.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of novel three level frequency multiplication LLC resonant converter, including sequentially connected input derided capacitors 1, switch bridge arm
2, resonant cavity 3, transformer 4 and current rectifying and wave filtering circuit 5；The input derided capacitors 1 are by the first capacitance C1 for being connected in series with and the
The other end of two capacitance C2 compositions, the first capacitance C1 and the second capacitance C2 are connect with the anode and cathode of power supply respectively；It is described
Bridge arm 2 is switched by first switch pipe Q1, second switch pipe Q2, third switching tube with body diode or parallel connection outside diode
The hourglass source electrode of Q3 and the 4th switching tube Q4 are sequentially connected in series, and are located at the drain electrode and the of the first switch pipe Q1 at switch bridge arm both ends
The source electrode of four switching tube Q4 is connected with the anode and cathode of power supply respectively, the second switch pipe Q2 and third switching tube Q3's
Intermediate connection point is connected with the intermediate connection point of the first capacitance C1 and the second capacitance C2 in input derided capacitors 1；The resonance
Chamber 3 is to be sequentially connected in series resonance circuit, the inductance Lr by resonant inductance Lr, resonant capacitance Cr and static exciter inductance Lm
The other end in switch bridge arm 2 first switch pipe Q1 and the intermediate connection point of second switch pipe Q2 be connected, the transformation
The other end of device magnetizing inductance Lm is connected with the intermediate connection point of third switching tube Q3 and the 4th switching tube Q4 in switch bridge arm 2
It connects；The secondary side of transformer 4 is connected with the input terminal of current rectifying and wave filtering circuit 5；The current rectifying and wave filtering circuit 5 is using general whole
The mode of stream bridge and output end parallel filtering capacitance carries out rectifying and wave-filtering.
The driving process of each switching tube is：It is a switch periods, first switch pipe Q1 and second switch between t1 to T
Pipe Q2 is driven to the complementation of band dead zone, and the duty ratio of first switch pipe Q1 drivings is 25%, third switching tube Q3 and the 4th switching tube
Q4 is driven to the complementation of band dead zone, and the duty ratio of third switching tube Q3 drivings is 75%；T1 moment first switch pipe Q1 and third are opened
It closes pipe Q3 to simultaneously turn on, second switch pipe Q2 and the 4th switching tube Q4 shutdowns；At the t2 moment, first switch pipe Q1 is first turned off, the
Three switching tube Q3 continue to be connected, by the second diode D2 afterflows of second switch pipe Q2 parallel connections, by dead time tdeadIt arrives
T3 moment second switch pipe Q2 no-voltages are open-minded；In t3~t4 times, pass through Q2 and Q3 afterflows and reversed resonance；T4 moment thirds
Switching tube Q3 shutdowns, pass through the 4th diode D4 afterflows of the 4th switching tube Q4 parallel connections；By dead time tdeadTo the t5 moment
4th switching tube Q4 no-voltages are open-minded；In t5~t6 times, pass through Q2 and Q4 afterflows and positive resonance；The 4th switching tube of t6 moment
Q4 is turned off, and second switch pipe Q2 continues to be connected, and passes through the third diode D3 afterflows of third switching tube Q3 parallel connections；When by dead zone
Between tdeadIt is open-minded to t7 moment third switching tube Q3 no-voltages；In t7~t8 times, pass through Q2 and Q3 afterflows and reversed resonance；t8
Moment second switch pipe Q2 turns off, and passes through the first diode D1 afterflows of first switch pipe Q1 parallel connections；By dead time tdead
Terminate to cycle T, it is open-minded into next cycle first switch pipe Q1 no-voltages.
Compared with prior art, the present invention having the following advantages that：
Relative to traditional half-bridge three-level LLC circuits, invention removes Clamp-on diodes of two Du Li, pass through conjunction
The driving hair wave of reason design switching tube, the voltage stress plateau value born when each switching tube being made to turn off are inlet highway voltage
Half is identical as the effect that Clamp-on diodes of Du Li are reached is used；Relative to traditional LLC circuits, the circuit resonance chamber work
Working frequency is twice of switching tube switching frequency, and under identical switching frequency, magnetic device can be worked with twice of frequency,
So as to further decreasing magnetic device volume, it is advantageously implemented the high frequency of product, planarization, miniaturization, from entirety
On reduce cost.
Description of the drawings
Fig. 1 is novel three level frequency multiplication LLC converter topology circuits.
Fig. 2 is each switching tube drive waveforms in three level frequency multiplication LLC converter topology circuits.
Fig. 3 is t1~t2 time current flow graphs.
Fig. 4 is t2~t3 time current flow graphs.
Fig. 5 is t3~t4 time current flow graphs.
Fig. 6 is t4~t5 time current flow graphs.
Fig. 7 is t5~t6 time current flow graphs.
Fig. 8 is t6~t7 time resonance current flow graphs.
Fig. 9 is t7~t8 time resonance current flow graphs.
Figure 10 is t8~T time resonance current flow graph.
Figure 11 is key node oscillogram.
Specific implementation mode
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Fig. 1 is novel three level frequency multiplication LLC converter topology circuits, as shown, a kind of novel three level times of the present invention
Frequency LLC resonant converter, including sequentially connected input derided capacitors 1, switch bridge arm 2, resonant cavity 3, transformer 4 and rectification filter
Wave circuit 5；The input derided capacitors 1 are made of the first capacitance C1 being connected in series with and the second capacitance C2, the first capacitance C1 and
The other end of second capacitance C2 is connect with the anode and cathode of power supply respectively；The switch bridge arm 2 by carry body diode or
The first switch pipe Q1 of parallel connection outside diode, the hourglass source electrode of second switch pipe Q2, third switching tube Q3 and the 4th switching tube Q4
Be sequentially connected in series, the source electrode of the drain electrode and the 4th switching tube Q4 that are located at the first switch pipe Q1 at switch bridge arm both ends respectively with electricity
The anode in source is connected with cathode, intermediate connection point and the input derided capacitors of the second switch pipe Q2 and third switching tube Q3
The intermediate connection point of first capacitance C1 and the second capacitance C2 are connected in 1；The resonant cavity 3 is by inductance Lr, capacitance Cr and to encourage
Magnetoelectricity sense Lm is sequentially connected in series resonance circuit, the other end of the inductance Lr and the first switch pipe Q1 in switch bridge arm 2 and
The intermediate connection point of second switch pipe Q2 is connected, the other end of the static exciter inductance Lm and the in switch bridge arm 2
The intermediate connection point of three switching tube Q3 and the 4th switching tube Q4 is connected；The input on the secondary side and current rectifying and wave filtering circuit 5 of transformer 4
End is connected；The current rectifying and wave filtering circuit 5 is to use general rectifier bridge (all-wave or full-bridge rectification) and output end parallel filtering
The mode of capacitance carries out rectifying and wave-filtering.
Fig. 2 be three level frequency multiplication LLC converter topology circuits in each switching tube drive waveforms, as shown, from t1 to T it
Between be a switch periods, t1 moment first switch pipe Q1 and third switching tube Q3 simultaneously turn on, second switch pipe Q2 and the 4th
Switching tube Q4 shutdowns；At the t2 moment, first switch pipe Q1 is first turned off, and third switching tube Q3 continues to be connected, by dead time
tdeadIt is open-minded to t3 moment second switch pipe Q2 no-voltages；In t3~t4 times, pass through Q2 and Q3 afterflows and reversed resonance；When t4
Carve the Q3 shutdowns of third switching tube；By dead time tdeadIt is open-minded to the 4th switching tube Q4 no-voltages of t5 moment；In t5~t6
Between, pass through Q2 and Q4 afterflows and positive resonance；The 4th switching tube Q4 shutdowns of t6 moment, second switch pipe Q2 continue to be connected；By
Dead time tdeadIt is open-minded to t7 moment third switching tube Q3 no-voltages；In t7~t8 times, by Q2 and Q3 afterflows and reversely
Resonance；The Q2 shutdowns of t8 moment second switch pipes, pass through the first diode D1 afterflows of first switch pipe Q1 parallel connections；When by dead zone
Between tdeadTerminate to cycle T, it is open-minded into next cycle first switch pipe Q1 no-voltages.
The course of work and current direction of the circuit topology in a switch periods：
By taking fs=fr as an example (fr is the series resonance frequency of resonant inductance Lr, resonant capacitance Cr,) should
The LLC circuits course of work includes mainly following critical stage：
Fig. 3 is t1~t2 time current flow graphs.At the t1 moment, first switch pipe Q1 and third switching tube Q3 are led simultaneously
Logical, second switch pipe Q2 and the 4th switching tube Q4 shutdowns, hereafter the electric current in circuit is successively from the first capacitance in derided capacitors 1
C1 cathode flow through third switching tube Q3, resonant cavity 3, first switch pipe Q1, return to the first capacitance C1 anodes；It is resonant inductance Lr, humorous
The capacitance Cr that shakes carries out resonance, and energy is fed back to positive bus-bar, continues positive resonance after resonance to zero, current direction is followed successively by first
Switching tube Q1, resonant cavity 3, third switching tube Q3." during t1~t2, resonance current is more than exciting current, passes through transformer 4
Energy is transmitted to secondary side.Diode D5 and D8 is connected in current rectifying and wave filtering circuit 5, and therefore, transformer primary voltage is clamped N*Vo
(N is the transformer primary pair side turn ratio, and Vo is converter DC output voltage), exciting current linear rise.Second opens during being somebody's turn to do
The voltage that pass pipe Q2 and the 4th both ends switching tube Q4 are born is respectively to input the first capacitance C1 and the second capacitance in derided capacitors 1
The voltage at the both ends C2, i.e. Vin/2.
Fig. 4 is t2~t3 time current flow graphs.At the t2 moment, first switch pipe Q1 is first turned off, third switching tube Q3 after
Continuous conducting, after the Q1 shutdowns of first switch pipe, resonance current charges to first switch pipe Q1 junction capacity, to second switch pipe Q2 knot electricity
Discharge capacitor, after the completion of charge and discharge, voltages of first switch pipe Q1 drain-source voltage Bei Clamp-on for the first both ends capacitance C1, i.e. Vin/2,
Second switch pipe Q2 junction capacity terminal voltages are 0V, and afterflow is connected in the second diode D2 of second switch pipe Q2 parallel connections naturally.From t2
Current direction in~t3 moment circuits as shown in figure 4, electric current flow successively through the Q2 parallel connections of second switch pipe the second diode D2,
Resonant cavity 3, third switching tube Q3.
Fig. 5 is t3~t4 time current flow graphs.The Q2 drivings of t3 moment second switch pipes are enabled, and no-voltage is open-minded.Hereafter
Electric current in circuit flow successively through second switch pipe Q2, resonant cavity 3, third switching tube Q3, resonant inductance Lr, resonant capacitance Cr into
Row resonance continues reversed resonance after resonance to zero, and current direction is followed successively by resonant cavity 3, second switch pipe Q2, third switching tube
Q3.Resonance current is less than exciting current during t3~t4, and energy is transmitted to secondary side by transformer 4.In current rectifying and wave filtering circuit 5
Diode D6 and D7 conducting, therefore, transformer primary voltage is clamped-N*Vo, and (N is the transformer primary pair side turn ratio, and Vo is transformation
Device DC output voltage), exciting current linear decline.First switch pipe Q1 and the 4th both ends switching tube Q4 are born during being somebody's turn to do
Voltage be respectively input derided capacitors 1 in the first capacitance C1 and the second both ends capacitance C2 voltage, i.e. Vin/2.
Fig. 6 is t4~t5 time current flow graphs.At the t4 moment, third switching tube Q3 is first turned off, second switch pipe Q2 after
Continuous conducting, after the Q3 shutdowns of third switching tube, resonance current charges to third switching tube Q3 junction capacity, to the 4th switching tube Q4 knot electricity
Discharge capacitor, after the completion of charge and discharge, voltages of third switching tube Q3 drain-source voltage Bei Clamp-on for the second both ends capacitance C2, i.e. Vin/2,
4th switching tube Q4 junction capacity terminal voltages are 0V, and afterflow is connected in the 4th diode D4 of the 4th switching tube Q4 parallel connections naturally.The mistake
Journey is maintained to the t5 moment.
Fig. 7 is t5~t6 time current flow graphs.T5 moment, second switch pipe MOS2 and the 4th switching tube MOS4 are led simultaneously
It is logical, first switch pipe MOS1 and the MOS3 shutdowns of third switching tube, hereafter the electric current in circuit flow successively through the 4th switching tube MOS4,
Resonant cavity 3, second switch pipe MOS2, the second input capacitance C2, resonant inductance Lr, resonant capacitance Cr carry out resonance, energy are returned
It is fed to negative busbar.During t5~t6, resonance current is more than exciting current, and energy is transmitted to secondary side by transformer 4.Rectification is filtered
In wave circuit 5 diode D5 and D8 be connected, therefore, transformer primary voltage be clamped N*Vo (N be the transformer primary pair side turn ratio,
Vo is converter DC output voltage), exciting current linear rise.First switch pipe Q1 and third switching tube Q3 two during being somebody's turn to do
The born voltage in end is respectively the voltage for inputting the first capacitance C1 and the second both ends capacitance C2 in derided capacitors 1, i.e. Vin/2.
Fig. 8 is t6~t7 time resonance current flow graphs.At the t6 moment, the 4th switching tube Q4 is first turned off, second switch pipe
Q2 continues to be connected, and after the 4th switching tube Q4 shutdowns, the 4th switching tube Q4 junction capacity of resonance current pair charges, to third switching tube Q3
Junction capacity is discharged, and after the completion of charge and discharge, the 4th switching tube Q4 drain-source voltage Bei Clamp-on are the voltage at the second both ends capacitance C2, i.e.,
Vin/2, third switching tube Q3 junction capacity terminal voltages are 0V, and the third diode D3 of third switching tube Q3 parallel connections begins to turn on continuous
Stream.From the current direction in t6~t7 moment circuits as shown in figure 8, electric current flows successively through second switch pipe Q2, resonant cavity 3,
The third diode D3 of three switching tube Q3 parallel connections.
Fig. 9 is t7~t8 time resonance current flow graphs.The Q3 drivings of t7 moment third switching tubes are enabled, and no-voltage is open-minded.
Hereafter the electric current in circuit flows successively through second switch pipe Q2, resonant cavity 3, third switching tube Q3, resonant inductance Lr, resonant capacitance
Cr carries out resonance, continues reversed resonance after resonance to zero, and current direction is followed successively by resonant cavity 3, second switch pipe Q2, third switch
Pipe Q3.Resonance current is less than exciting current during being somebody's turn to do, and energy is transmitted to secondary side by transformer 4.Two in current rectifying and wave filtering circuit 5
Pole pipe D6 and D7 conducting, therefore, transformer primary voltage is clamped-N*Vo, and (N is the transformer primary pair side turn ratio, and Vo is converter
DC output voltage), exciting current linear decline.First switch pipe Q1 and the 4th both ends switching tube Q4 are born during this
Voltage is respectively the voltage for inputting the first capacitance C1 and the second both ends capacitance C2 in derided capacitors 1, i.e. Vin/2.
Figure 10 is t8~T time resonance current flow graph.T8 moment second switch pipes Q2 is first turned off, third switching tube Q3 after
Continuous conducting, after the Q2 shutdowns of second switch pipe, resonance current charges to second switch pipe Q2 junction capacity, to first switch pipe Q1 knot electricity
Discharge capacitor, after the completion of charge and discharge, voltages of second switch pipe Q2 drain-source voltage Bei Clamp-on for the first both ends capacitance C1, i.e. Vin/2,
First switch pipe Q1 junction capacity terminal voltages are 0V, and afterflow is connected in the first diode D1 of first switch pipe Q1 parallel connections naturally.From t8
Current direction in~T moment circuits is as shown in Figure 10, and electric current flows successively through in parallel first of resonant cavity 3, first switch pipe Q1
Diode D1, third switching tube Q3.
In the above course of work, after the Q1 shutdowns of first switch pipe, the second diode D2 afterflows of second switch pipe Q2 parallel connections
Conducting is realized and clamps (Vin/2) to first switch pipe Q1 drain-source voltages, while being opened for the no-voltage of follow-up second switch pipe Q2
Logical to be ready, the drain-source voltage that second switch pipe Q2 opens rear first switch pipe Q1 clamps always in Vin/2；
After the Q2 shutdowns of second switch pipe, the first diode D1 afterflows of first switch pipe Q1 parallel connections are connected, and realize to first
Switching tube Q1 drain-source voltages clamp (Vin/2), while opening and being ready for the no-voltage of follow-up first switch pipe Q1, and first
The drain-source voltage that switching tube Q1 opens rear first switch pipe Q2 clamps always in Vin/2；
After the Q3 shutdowns of third switching tube, the 4th diode D4 afterflows of the 4th switching tube Q4 parallel connections are connected, and realize to third
Switching tube Q3 drain-source voltages clamp (Vin/2), while opening and being ready for the no-voltage of follow-up 4th switching tube Q4, and the 4th
The drain-source voltage that switching tube Q4 opens rear third switching tube Q3 clamps always in Vin/2；
After 4th switching tube Q4 shutdowns, the third diode D3 afterflows of third switching tube Q3 parallel connections are connected, and realize to the 4th
Switching tube Q4 drain-source voltages clamp (Vin/2), while opening and being ready for the no-voltage of subsequent third switching tube Q3, third
The drain-source voltage that switching tube Q3 opens rear 4th switching tube Q4 clamps always in Vin/2.The converter can reach and tradition
The same voltage stress effect of three-level LLC topology with clamp diode, so as to select common low voltage specification
Switching tube.
Figure 11 is key node oscillogram, be followed successively by from top to bottom first switch pipe Q1 driving, second switch pipe Q2 drivings,
Third switching tube Q3 drivings, the 4th switching tube Q4 drivings, first switch pipe Q1 drain-source voltages stress, second switch pipe Q2 drain-sources
Pole tension stress, third switching tube Q3 drain-source voltages stress, the 4th switching tube Q4 drain-source voltages stress, primary electricity
Pressure, first switch pipe Q1 electric currents (it is that just, on the contrary is negative to define drain-to-source electric current), (the definition leakage of second switch pipe Q2 electric currents
Pole to source current be just, otherwise be negative), third switching tube Q3 electric currents (defining drain-to-source electric current as just, on the contrary is negative),
4th switching tube Q4 electric currents (it is that just, on the contrary is negative to define drain-to-source electric current), cavity current (define circuit electricity in Fig. 1
Stream from resonant inductance to resonant capacitance direction for just, otherwise be negative) and transformer magnetizing current (circuit excitation is electric in definition Fig. 1
Inducing current is flowed from top to bottom for just, on the contrary is negative).
It can be seen that in switch 2 each switch periods of bridge arm from the above course of work and Figure 11, resonant cavity completed for two weeks
The resonance of phase, resonant cavity input energy is respectively to input positive pole line capacitance C1 and negative mother in derided capacitors 1 in two switch periods
Line capacitance C2, to realize the working effect of resonant cavity frequency multiplication.
Claims (1)
1. a kind of novel three level frequency multiplication LLC resonant converter, it is characterised in that：Including sequentially connected input derided capacitors
(1), switch bridge arm (2), resonant cavity (3), transformer (4) and current rectifying and wave filtering circuit (5)；The input derided capacitors (1) are by going here and there
Join the first capacitance (C1) and the second capacitance (C2) composition of connection, the other end point of the first capacitance (C1) and the second capacitance (C2)
It is not connect with the anode and cathode of power supply；The switch bridge arm (2) is by first with body diode or parallel connection outside diode
Switching tube (Q1), second switch pipe (Q2), third switching tube (Q3) and the 4th switching tube (Q4) hourglass source electrode be sequentially connected in series,
Positioned at the first switch pipe (Q1) at switch bridge arm both ends drain electrode and the 4th switching tube (Q4) source electrode respectively with the anode of power supply
It is connected with cathode, intermediate connection point and the input derided capacitors (1) of the second switch pipe (Q2) and third switching tube (Q3)
In the first capacitance (C1) be connected with the intermediate connection point of the second capacitance (C2)；The resonant cavity (3) is by inductance (Lr), capacitance
(Cr) and static exciter inductance (Lm) is sequentially connected in series resonance circuit, the other end and the switch bridge arm of the inductance (Lr)
(2) the first switch pipe (Q1) in is connected with the intermediate connection point of second switch pipe (Q2), the static exciter inductance
(Lm) the other end is connected with the intermediate connection point of third switching tube (Q3) and the 4th switching tube (Q4) in switch bridge arm (2)
It connects；The secondary side of transformer (4) is connected with the input terminal of current rectifying and wave filtering circuit (5)；The current rectifying and wave filtering circuit (5) is using logical
The mode of rectifier bridge and output end parallel filtering capacitance carries out rectifying and wave-filtering；
The driving process of each switching tube is：It is a switch periods, first switch pipe (Q1) and second switch pipe between t1 to T
(Q2) it is driven to the complementation of band dead zone, the duty ratio of first switch pipe (Q1) driving is 25%, and third switching tube (Q3) and the 4th is opened
It closes pipe (Q4) and is driven to the complementation of band dead zone, the duty ratio of third switching tube (Q3) driving is 75%；T1 moment first switch pipes
(Q1) it is simultaneously turned on third switching tube (Q3), second switch pipe (Q2) and the shutdown of the 4th switching tube (Q4)；At the t2 moment, first
Switching tube (Q1) is first turned off, and third switching tube (Q3) continues to be connected, and passes through the second diode of second switch pipe (Q2) parallel connection
(D2) afterflow, by dead time tdeadIt is open-minded to t3 moment second switch pipe (Q2) no-voltage；In t3~t4 times, pass through
Two switching tubes (Q2) and (Q3) afterflow of third switching tube and reversed resonance；T4 moment third switching tubes (Q3) turn off, and pass through the 4th
The 4th diode (D4) afterflow of switching tube (Q4) parallel connection；By dead time tdeadTo zero electricity of the 4th switching tube (Q4) of t5 moment
It presses off logical；In t5~t6 times, pass through second switch pipe (Q2) and the 4th switching tube (Q4) afterflow and positive resonance；The t6 moment
Four switching tubes (Q4) turn off, and second switch pipe (Q2) continues to be connected, and passes through the third diode of third switching tube (Q3) parallel connection
(D3) afterflow；By dead time tdeadIt is open-minded to t7 moment third switching tube (Q3) no-voltage；In t7~t8 times, pass through
Two switching tubes (Q2) and (Q3) afterflow of third switching tube and reversed resonance；T8 moment second switch pipes (Q2) turn off, and pass through first
The first diode (D1) afterflow of switching tube (Q1) parallel connection；By dead time tdeadTerminate to cycle T, into next cycle
First switch pipe (Q1) no-voltage is open-minded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610480373.2A CN106026665B (en) | 2016-06-27 | 2016-06-27 | A kind of novel three level frequency multiplication LLC resonant converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610480373.2A CN106026665B (en) | 2016-06-27 | 2016-06-27 | A kind of novel three level frequency multiplication LLC resonant converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106026665A CN106026665A (en) | 2016-10-12 |
| CN106026665B true CN106026665B (en) | 2018-11-02 |
Family
ID=57084570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610480373.2A Active CN106026665B (en) | 2016-06-27 | 2016-06-27 | A kind of novel three level frequency multiplication LLC resonant converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106026665B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533232A (en) * | 2016-12-05 | 2017-03-22 | 特变电工西安电气科技有限公司 | Neutral point clamping LLC resonant converter control method |
| CN110768535B (en) * | 2019-10-22 | 2021-09-14 | 广州金升阳科技有限公司 | Wide gain control method of variable topology LLC resonant converter |
| WO2021127961A1 (en) * | 2019-12-24 | 2021-07-01 | 华为技术有限公司 | Conversion circuit and related electronic device |
| CN112838766A (en) * | 2021-01-06 | 2021-05-25 | 西南交通大学 | High-voltage-reduction-ratio three-level LLC resonant converter and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204858982U (en) * | 2015-05-29 | 2015-12-09 | 特变电工西安电气科技有限公司 | Three level LLC resonant transformation wares |
| CN205847105U (en) * | 2016-06-27 | 2016-12-28 | 特变电工西安电气科技有限公司 | A kind of three level frequency multiplication LLC resonant transformation devices |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6123900B2 (en) * | 2013-09-02 | 2017-05-10 | 株式会社村田製作所 | Inverter device |
-
2016
- 2016-06-27 CN CN201610480373.2A patent/CN106026665B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204858982U (en) * | 2015-05-29 | 2015-12-09 | 特变电工西安电气科技有限公司 | Three level LLC resonant transformation wares |
| CN205847105U (en) * | 2016-06-27 | 2016-12-28 | 特变电工西安电气科技有限公司 | A kind of three level frequency multiplication LLC resonant transformation devices |
Non-Patent Citations (1)
| Title |
|---|
| 输出倍频级联不对称半桥三电平DC/DC变换器;石勇;《电力电子技术》;20090131;第43卷(第1期);说明书第10-11页第2节，图1、3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106026665A (en) | 2016-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205847105U (en) | A kind of three level frequency multiplication LLC resonant transformation devices | |
| CN109217681B (en) | Bidirectional resonant converter | |
| CN108900100B (en) | A kind of single-phase high efficiency high frequency isolated form rectifier | |
| CN112087147B (en) | Converter wide gain control method and application thereof | |
| CN105305829B (en) | The unidirectional DC DC converters of current mode and symmetric double PWM add phase-shifting control method | |
| CN104852590B (en) | A kind of new three-level LLC resonance inverter | |
| CN101562399B (en) | Full-bridge double-output direct current-alternating current converter | |
| CN107994789A (en) | A kind of isolated form integrated form AC-DC converter based on non-bridge PFC and LLC resonance | |
| CN106026665B (en) | A kind of novel three level frequency multiplication LLC resonant converter | |
| CN101132151B (en) | Electric power supply converter | |
| CN103887976B (en) | The imported resonant type soft-switch DC/DC converters of current source | |
| CN103595260A (en) | Push-pull - flexible switching converter with serial-connected resonance unit | |
| WO2023098218A1 (en) | Wide-range resonant soft-switching bidirectional direct-current converter, and control method therefor | |
| CN101527520A (en) | Single-stage single-phase AC-DC convertor based on LLC series resonance | |
| CN102231600A (en) | Novel full-bridge soft switch circuit applied to arc welding inverter power supply | |
| CN110649802B (en) | Correction method of single-stage resonant AC-DC power factor correction conversion device | |
| CN217087777U (en) | Wide-range resonant soft-switching bidirectional direct-current converter | |
| CN106533232A (en) | Neutral point clamping LLC resonant converter control method | |
| CN201409088Y (en) | Full-bridge twin-output direct current to direct current converter | |
| CN204858982U (en) | Three level LLC resonant transformation wares | |
| CN110224605B (en) | Full-bridge conversion circuit | |
| CN107171563A (en) | The combined converter of tight adjustment output | |
| CN106329943A (en) | Low-voltage DC boost conversion and control circuit | |
| CN215580913U (en) | Isolated three-level DC/DC converter | |
| CN204906192U (en) | Boost module is recommended to wide region full cut -off ring high efficiency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |