CN109412446A - Soft switching inverter circuit with constant common mode voltage - Google Patents
Soft switching inverter circuit with constant common mode voltage Download PDFInfo
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- CN109412446A CN109412446A CN201811396501.0A CN201811396501A CN109412446A CN 109412446 A CN109412446 A CN 109412446A CN 201811396501 A CN201811396501 A CN 201811396501A CN 109412446 A CN109412446 A CN 109412446A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
-
- 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
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of soft switching inverter circuits with constant common mode voltage, including high frequency main switch unit, resonant network unit and afterflow to clamp branch.The present invention is provided for HF switch pipe using no-voltage or zero current as the Sofe Switch operating condition of technical characteristic by the way that the resonant network with positive bus-bar and negative busbar polar character is added；Afterflow is formed by the way that the midpoint that series diode afterflow branch and DC bus divide branch, and connect two branches is added and clamps branch, guarantees that two resonant networks in the synchronization of switching frequency scale, and realize that common-mode voltage clamps.The present invention can construct circuit topology abundant for the applications such as efficient, high power density non-isolated grid-connected inverter and the driving of electric car unsteady flow.
Description
Technical field
The invention belongs to inverter topology technical field more particularly to a kind of soft-switching inversions with constant common mode voltage
Device circuit.
Background technique
Non-isolation type inverter circuit has that structure is simple, conversion efficiency is high and at low cost by taking photovoltaic combining inverter as an example
The advantages that, in the industry cycle widely applied.As shown in Figure 1, being the inverse of the hard switching working method of German Sunways company invention
Become device circuit (EP1369985A2), to reach higher conversion efficiency, operating switch frequency is general lower (10~20kHz)；
But also bigger filter inductance and filter capacitor are needed, the volume weight of gird-connected inverter had not only been increased in this way, but also was increased
Cost.
Limit the loss that the main factor that non-isolated inverter conversion efficiency improves is switching device, including conduction loss
With switching loss two parts.Wherein, conduction loss is determined by circuit topological structure and device development level；Switching loss can lead to
It crosses using soft switch technique and reduces or even eliminates.By development in more than 20 years, researcher proposed various types of inverse
Become device soft switch circuit topology, can be divided into two major classes according to the location of resonance link: DC side mode of resonance is (also referred to as
RDCLI) with exchange side mode of resonance (also referred to as RPI), respectively as shown in figures 2 a and 2b, by U.S.'s Divan teaching inventive and building
It is vertical.
In general, RDCLI and RPI is used directly for isolated form (band high frequency or low frequency isolation transformer) inverter
The inversion link of system；But these technologies can't directly apply in non-isolated grid-connected inverter (TLI).Its reason
Be: in TLI, due to the presence of solar panel parasitic capacitance over the ground, there may be high frequency time-varying common-mode voltages for the switch motion of TLI
It acts on parasitic capacitance, so that allowed band can be can exceed that by generating common mode current (also referred to as leakage current or earth-current).When
When applied to the driving of electric car unsteady flow, high frequency time-varying common-mode voltage will increase the abrasion of motor shafting and destroy winding insulation.
Therefore, in non-isolated inversion system use soft switch technique, it is necessary to avoid generate common-mode voltage, to increase
The constraint condition for having added soft switch circuit to construct.
Summary of the invention
Goal of the invention: in view of the above problems, the present invention proposes a kind of soft switching inverter electricity with constant common mode voltage
Road realizes common-mode voltage clamp, inverter is pushed to develop to efficient, high power density direction.
Technical solution: to achieve the purpose of the present invention, the technical scheme adopted by the invention is that: one kind having constant common-mode
The soft switching inverter circuit of voltage, including high frequency main switch unit, positive bus-bar polarity resonant network, negative busbar polarity Resonance Neural Network
Network and afterflow clamp branch.
The high frequency main switch unit includes the parallel combination of the first power switch tube and the first power diode, the second function
The parallel combination of rate switching tube and the second power diode, third power switch tube and third power diode parallel combination,
The parallel combination of 4th power switch tube and the 4th power diode.
Afterflow clamp branch includes the first afterflow clamp diode and the second afterflow clamp diode tandem compound, the
One bus derided capacitors and the second bus derided capacitors tandem compound；First afterflow clamp diode of the afterflow clamp branch
Anode and the cathode of the second afterflow clamp diode connect to form midpoint, and with the first bus derided capacitors and the second bus point
The midpoint of voltage capacitance connects；The anode of first bus derided capacitors connect with positive bus-bar, the cathode of the second bus derided capacitors with
Negative busbar connection.
The positive bus-bar polarity resonant network and negative busbar polarity resonant network by inductance, capacitor, switching tube, diode,
The elements such as resistance are constituted；The positive bus-bar polarity resonant network has 4 connectivity ports, and port 11 connects positive bus-bar, port 12 connects
The emitter or source electrode, port 13 that connect the first power switch tube connect the emitter or source electrode, port 14 of the second power switch tube
Connect the cathode of the first afterflow clamp diode；The negative busbar polarity resonant network has 4 connectivity ports, and the connection of port 21 is negative
Bus, port 22 connect the collector of third power switch tube or the collector of drain electrode, the 4th power switch tube of the connection of port 23
Or drain electrode, port 24 connect the anode of the second afterflow clamp diode.
First power switch tube, the second power switch tube, third power switch tube, the 4th power switch tube are full control
Type device.
The positive bus-bar polarity resonant network includes that the first auxiliary power switching tube and the first auxiliary power diodes are in parallel
Combination, the second auxiliary power switching tube and the second auxiliary power diodes parallel combination, the first auxiliary resonance capacitor, the first auxiliary
Resonant inductance；The negative busbar polarity resonant network includes that third auxiliary power switching tube and third auxiliary power diodes are in parallel
Combination, the 4th auxiliary power switching tube and the 4th auxiliary power diodes parallel combination, the second auxiliary resonance capacitor, the second auxiliary
Resonant inductance.
The positive bus-bar polarity resonant network includes that the first auxiliary power switching tube and the first auxiliary power diodes are in parallel
Combination, first block power switch tube and first that power diode parallel combination, second is blocked to block power switch tube and second
Block power diode parallel combination, the first auxiliary resonance capacitor, the second auxiliary resonance capacitor, the first auxiliary resonance inductance；Institute
Stating negative busbar polarity resonant network includes the second auxiliary power switching tube and the second auxiliary power diodes parallel combination, third resistance
Disconnected power switch tube and third block power diode parallel combination, the 4th that power switch tube and the 4th is blocked to block two pole of power
Pipe parallel combination, third auxiliary resonance capacitor, the 4th auxiliary resonance capacitor, the second auxiliary resonance inductance.
The soft switching inverter circuit further includes by the 5th power switch tube and the 5th power diode parallel combination,
The continuous current circuit of six power switch tubes and the 6th power diode parallel combination composition.
A kind of switching sequence control method of the soft switching inverter circuit with constant common mode voltage, positive half cycle, second
Power switch tube and third power switch tube turn off always, the first power switch tube and the 4th power switch tube drive having the same
Dynamic timing, and press Unipolar SPWM mode high frequency mo；Negative half period, the first power switch tube and the 4th power switch tube are closed always
It is disconnected, the second power switch tube and third power switch tube driver' s timing having the same, and it is dynamic by Unipolar SPWM mode high frequency
Make.
The utility model has the advantages that the present invention is by being added two groups of resonant networks being made of switching tube, capacitor, inductance, diode etc.
And the auxiliary branch that afterflow clamp diode is constituted, cooperate switch control time sequence, the first power switch tube S may be implemented1,
Two power switch tube Ss2, third power switch tube S3With the 4th power switch tube S4Zero current or Zero Current Switch characteristic, thus
Efficient, the high power density of non-isolated converter system may be implemented.
Detailed description of the invention
Fig. 1 is a kind of non-isolated grid-connected inverter circuit schematic diagram of the prior art；
Fig. 2 is existing soft switching inverter structure；Fig. 2 a is DC side mode of resonance；Fig. 2 b is exchange side mode of resonance；
Fig. 3 is the soft switching inverter circuit structure chart with constant common mode voltage of the invention；
Fig. 4 is the switch control time sequence figure of HF switch pipe of the invention；
Fig. 5 is the main circuit schematic diagram of the embodiment of the present invention one；
Fig. 6 is the switch control time sequence figure of the switching tube of the embodiment of the present invention one；
Fig. 7 is the working waveform figure of embodiment one；Fig. 7 a is the first power switch tube S1Drive waveforms, collect-penetrate end electricity
Corrugating and collector current waveform；Fig. 7 b is the first auxiliary power switching tube S1aDrive waveforms, drain-source end voltage waveform and
Drain current wavefonn；Fig. 7 c is the male-female end voltage waveform and anodic current waveforms of afterflow clamp diode；
Fig. 8 is the main circuit schematic diagram of the embodiment of the present invention two；
Fig. 9 is the switch control time sequence figure of the switching tube of the embodiment of the present invention two；
Figure 10 is the working waveform figure of embodiment two；Figure 10 a is the first power switch tube S1Drive waveforms, drain-source end
Voltage waveform and drain current wavefonn；Figure 10 b is the first auxiliary power switching tube S1aDrive waveforms, drain-source end voltage waveform
And drain current wavefonn；Figure 10 c is the male-female end voltage waveform and anodic current waveforms of afterflow clamp diode.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawings and examples.
As shown in figure 3, the soft switching inverter circuit of the present invention with constant common mode voltage, including high frequency master open
It closes unit 1, positive bus-bar polarity resonant network 2, negative busbar polarity resonant network 3 and afterflow and clamps branch 4.
High frequency main switch unit 1 is by the first power switch tube S1With the first power diode D1Parallel combination, the second power
Switching tube S2With the second power diode D2Parallel combination, third power switch tube S3With third power diode D3Parallel connection
Combination, the 4th power switch tube S4With the 4th power diode D4Parallel combination constitute.First power switch tube S1, the second function
Rate switching tube S2, third power switch tube S3, the 4th power switch tube S4For wholly-controled device.
Positive bus-bar polarity resonant network 2 is generally made of elements such as inductance, capacitor, switching tube, diode, resistance；Negative mother
Line polarity resonant network 3 is generally made of elements such as inductance, capacitor, switching tube, diode, resistance.
Positive bus-bar polarity resonant network 2 has 4 connectivity ports, and port 11 connects positive bus-bar, port 12 connects the first power
Switching tube S1Emitter or source electrode, port 13 connect the second power switch tube S2Emitter or source electrode, port 14 connection first
Afterflow clamp diode Dfc1Cathode；Negative busbar polarity resonant network 3 has 4 connectivity ports, and port 21 connects negative busbar, end
Mouth 22 connects third power switch tube Ss3Collector or drain electrode, port 23 connect the 4th power switch tube S4Collector or leakage
Pole, port 24 connect the second afterflow clamp diode Dfc2Anode；
Afterflow clamps branch 4 by the first afterflow clamp diode Dfc1With the second afterflow clamp diode Dfc2Tandem compound,
First bus derided capacitors Cdc1With the second bus derided capacitors Cdc2Tandem compound is constituted.First afterflow of afterflow clamp branch 4
Clamp diode Dfc1Anode and the second afterflow clamp diode Dfc2Cathode connect to form midpoint, and with the first bus divide
Capacitor Cdc1With the second bus derided capacitors Cdc2Midpoint connection.First bus derided capacitors Cdc1Anode connect with positive bus-bar,
Second bus derided capacitors Cdc2Cathode connect with negative busbar.
As shown in figure 4, the HF switch pipe of the soft switching inverter circuit of the present invention with constant common mode voltage
Switch control time sequence.In positive half cycle, the first power switch tube S1With the 4th power switch tube S4Driver' s timing having the same,
And press Unipolar SPWM mode high frequency mo；In negative half period, by the first power switch tube S1With the 4th power switch tube S4It closes always
It is disconnected.In negative half period, the second power switch tube S2With third power switch tube S3Driver' s timing having the same, and press unipolarity
SPWM mode high frequency mo；In positive half cycle, by the second power switch tube S2With third power switch tube S3It turns off always.
Soft switching inverter circuit structure with constant common mode voltage more than the hard switching circuit of the prior art 2 groups it is humorous
Vibrating network, help realize that power device opens the softening of turn off process, to eliminate or weaken the switching loss of hard switching generation
And the problems such as electromagnetic interference.
Embodiment one
As shown in figure 5, describing the constituted mode of the main circuit of the embodiment of the present invention one, combined using IGBT and MOSFET
Circuit diagram；By the first power switch tube S1With the first power diode D1Parallel combination, the second power switch tube S2With the second function
Rate diode D2Parallel combination, third power switch tube S3With third power diode D3Parallel combination and the 4th power switch tube
S4With the 4th power diode D4Parallel combination forms high frequency main switch unit.
By the first auxiliary power switching tube S1aWith the first auxiliary power diodes D1aParallel combination, the second auxiliary power are opened
Close pipe S2aWith the second auxiliary power diodes D2aParallel combination, the first auxiliary resonance capacitor C1a, the first auxiliary resonance inductance L1aGroup
At positive bus-bar polarity resonant network 2.Third auxiliary power switching tube S3aWith third auxiliary power diodes D3aParallel combination,
Four auxiliary power switching tube S4aWith the 4th auxiliary power diodes D4aParallel combination, the second auxiliary resonance capacitor C2a, second auxiliary
Resonant inductance L2aForm negative busbar polarity resonant network 3.
By the first afterflow clamp diode Dfc1With the second afterflow clamp diode Dfc2Tandem compound, the first bus partial pressure electricity
Hold Cdc1With the second bus derided capacitors Cdc2Tandem compound constitutes afterflow and clamps branch 4.By the 5th power switch tube S5With the 5th
Power diode D5Parallel combination, the 6th power switch tube S6With the 6th power diode D6Parallel combination forms continuous current circuit.
As shown in fig. 6, being the driving signal timing diagram of the embodiment of the present invention one, the first power switch tube S1With the 4th power
Switching tube S4Driver' s timing having the same simultaneously presses Unipolar SPWM mode high frequency mo, in grid current positive half cycle work always
Make, stops working in negative half period；Second power switch tube S2With third power switch tube S3Driver' s timing having the same is simultaneously pressed single
Polarity S PWM mode high frequency mo works always in grid current negative half period, stops working in positive half cycle；5th power switch tube
S5It is constantly in grid current negative half period, the 6th power switch tube S6It is constantly in grid current negative half period, and the 5th function
Rate switching tube S5With the 6th power switch tube S6Driving signal it is complementary, and dead time is added；First auxiliary power switching tube
S1aWith the 4th auxiliary power switching tube S4aDriver' s timing having the same is simultaneously pressed and the first power switch tube S1It is opened with the 4th power
Close pipe S4Quasi- complementary mode high frequency mo, works always in grid current positive half cycle, stops working in negative half period, and first
Auxiliary switch S1aThe conducting incipient stage and the first power switch tube S1Conducting end stage have crossover region, the 4th auxiliary switch
S4aConducting end stage and the 4th power switch tube S4The conducting incipient stage have crossover region；Second auxiliary power switching tube S2a
With third auxiliary power switching tube S3aDriver' s timing having the same is simultaneously pressed and the second power switch tube S2With third power switch
Pipe S3Quasi- complementary mode high frequency mo, works always in grid current negative half period, stops working in positive half cycle, and second is auxiliary
Help switch S2aThe conducting incipient stage and the second power switch tube S2Conducting end stage have crossover region, third auxiliary switch S3a
Conducting end stage and third power switch tube S3The conducting incipient stage have crossover region.
It can be seen that the feelings that circuit structure shown in Fig. 5 cooperates driver' s timing shown in Fig. 6 from Fig. 7 a to Fig. 7 c result of implementation
Under condition, the first power switch tube S may be implemented1, the second power switch tube S2, third power switch tube S3With the 4th power switch
Pipe S4Zero current turning-on and zero-current switching；Realize the first auxiliary power switching tube S1a, the second auxiliary power switching tube S2a,
Three auxiliary power switching tube S3aWith the 4th auxiliary power switching tube S4aZero current turning-on and zero-current switching；Realize that first is continuous
Flow clamp diode Dfc1With the second afterflow clamp diode Dfc2No-voltage open and zero-current switching, so that it is reversed to eliminate it
Recovery problem.
Embodiment two
As shown in figure 8, describing the constituted mode of the main circuit of the embodiment of the present invention two, combined using IGBT and MOSFET
Circuit diagram；By the first power switch tube S1With the first power diode D1Parallel combination, the second power switch tube S2With the second function
Rate diode D2Parallel combination, third power switch tube S3With third power diode D3Parallel combination and the 4th power switch tube
S4With the 4th power diode D4Parallel combination forms high frequency main switch unit.
By the first auxiliary power switching tube S1aWith the first auxiliary power diodes D1aParallel combination, the first blocking power are opened
Close pipe S1bPower diode D is blocked with first1bParallel combination, second block power switch tube S2bTwo pole of power is blocked with second
Pipe D2bParallel combination, the first auxiliary resonance capacitor C1a, the second auxiliary resonance capacitor C2a, the first auxiliary resonance inductance L1aComposition is just
Bus polarity resonant network 2.By the second auxiliary power switching tube S2aWith the second auxiliary power diodes D2aParallel combination, third
Block power switch tube S3bPower diode D is blocked with third3bParallel combination, the 4th block power switch tube S4bWith the 4th resistance
Disconnected power diode D4bParallel combination, third auxiliary resonance capacitor C3a, the 4th auxiliary resonance capacitor C4a, the second auxiliary resonance electricity
Feel L2aForm negative busbar polarity resonant network 3.
By the first afterflow clamp diode Dfc1With the second afterflow clamp diode Dfc2Tandem compound, the first bus partial pressure electricity
Hold Cdc1With the second bus derided capacitors Cdc2Tandem compound constitutes afterflow and clamps branch 4.By the 5th power switch tube S5With the 5th
Power diode D5Parallel combination, the 6th power switch tube S6With the 6th power diode D6Parallel combination forms continuous current circuit.
As shown in figure 9, being the driving signal timing of the embodiment of the present invention two, the first power switch tube S1It is opened with the 4th power
Close pipe S4Driver' s timing having the same simultaneously presses Unipolar SPWM mode high frequency mo, works always in grid current positive half cycle,
It stops working in negative half period；Second power switch tube S2With third power switch tube S3Driver' s timing having the same simultaneously presses monopole
Property SPWM mode high frequency mo, works always in grid current negative half period, stops working in positive half cycle；5th power switch tube
S5, second block power switch tube S2bPower switch tube S is blocked with third3bIt is constantly in grid current negative half period, the 6th function
Rate switching tube S6, first block power switch tube S1bPower switch tube S is blocked with the 4th4bIt is led always in grid current positive half cycle
It is logical, and the 5th power switch tube S5With the 6th power switch tube S6Driving signal it is complementary, and dead time is added；First is auxiliary
Help power switch tube S1aWith the second auxiliary power switching tube S2aDriver' s timing having the same is simultaneously pressed and the first power switch tube S1
With the 4th power switch tube S4Quasi- complementary mode is in power grid positive half cycle high frequency mo；It is pressed and the second power switch tube in negative half period
S2With third power switch tube S3Quasi- complementary mode is in power grid negative half period high frequency mo.
It can be seen that circuit structure shown in Fig. 8 from Figure 10 a to Figure 10 c result of implementation and cooperate driver' s timing shown in Fig. 9
In the case of, the first power switch tube S may be implemented1, the second power switch tube S2, third power switch tube S3It is opened with the 4th power
Close pipe S4No-voltage open and zero voltage turn-off；Realize the first auxiliary power switching tube S1aWith the second auxiliary power switching tube S2a
Zero current turning-on；Realize the first afterflow clamp diode Dfc1With the second afterflow clamp diode Dfc2Zero-current switching, from
And eliminate its reverse-recovery problems.
Claims (9)
1. a kind of soft switching inverter circuit with constant common mode voltage, which is characterized in that including high frequency main switch unit
(1), positive bus-bar polarity resonant network (2), negative busbar polarity resonant network (3) and afterflow clamp branch (4).
2. the soft switching inverter circuit according to claim 1 with constant common mode voltage, which is characterized in that the height
Frequency main switch unit (1) includes the first power switch tube (S1) and the first power diode (D1) parallel combination, the second power opens
Close pipe (S2) and the second power diode (D2) parallel combination, third power switch tube (S3) and third power diode (D3)
Parallel combination, the 4th power switch tube (S4) and the 4th power diode (D4) parallel combination.
3. the soft switching inverter circuit according to claim 2 with constant common mode voltage, which is characterized in that described continuous
Stream clamp branch (4) includes the first afterflow clamp diode (Dfc1) and the second afterflow clamp diode (Dfc2) tandem compound,
One bus derided capacitors (Cdc1) and the second bus derided capacitors (Cdc2) tandem compound；
First afterflow clamp diode (D of afterflow clamp branch (4)fc1) anode and the second afterflow clamp diode
(Dfc2) cathode connect to form midpoint, and with the first bus derided capacitors (Cdc1) and the second bus derided capacitors (Cdc2) in
Point connection；First bus derided capacitors (Cdc1) anode connect with positive bus-bar, the second bus derided capacitors (Cdc2) cathode with
Negative busbar connection.
4. the soft switching inverter circuit according to claim 3 with constant common mode voltage, which is characterized in that it is described just
Bus polarity resonant network (2) and negative busbar polarity resonant network (3) are by members such as inductance, capacitor, switching tube, diode, resistance
Part is constituted；
The positive bus-bar polarity resonant network (2) has 4 connectivity ports, and port 11 connects positive bus-bar, port 12 connects the first function
Rate switching tube (S1) emitter or source electrode, port 13 connect the second power switch tube (S2) emitter or source electrode, port 14 connect
Meet the first afterflow clamp diode (Dfc1) cathode；
The negative busbar polarity resonant network (3) has 4 connectivity ports, and port 21 connects negative busbar, port 22 connects third function
Rate switching tube (S3) collector or drain electrode, port 23 connect the 4th power switch tube (S4) collector or drain electrode, port 24 connect
Meet the second afterflow clamp diode (Dfc2) anode.
5. the soft switching inverter circuit according to claim 2 with constant common mode voltage, which is characterized in that described
One power switch tube (S1), the second power switch tube (S2), third power switch tube (S3), the 4th power switch tube (S4) it is complete
Control type device.
6. the soft switching inverter circuit according to claim 4 with constant common mode voltage, which is characterized in that it is described just
Bus polarity resonant network (2) includes the first auxiliary power switching tube (S1a) and the first auxiliary power diodes (D1a) group in parallel
It closes, the second auxiliary power switching tube (S2a) and the second auxiliary power diodes (D2a) parallel combination, the first auxiliary resonance capacitor
(C1a), the first auxiliary resonance inductance (L1a)；
The negative busbar polarity resonant network (3) includes third auxiliary power switching tube (S3a) and third auxiliary power diodes
(D3a) parallel combination, the 4th auxiliary power switching tube (S4a) and the 4th auxiliary power diodes (D4a) parallel combination, the second auxiliary
Resonant capacitance (C2a), the second auxiliary resonance inductance (L2a)。
7. the soft switching inverter circuit according to claim 4 with constant common mode voltage, which is characterized in that it is described just
Bus polarity resonant network (2) includes the first auxiliary power switching tube (S1a) and the first auxiliary power diodes (D1a) group in parallel
It closes, first blocks power switch tube (S1b) and the first blocking power diode (D1b) parallel combination, the second blocking power switch tube
(S2b) and the second blocking power diode (D2b) parallel combination, the first auxiliary resonance capacitor (C1a), the second auxiliary resonance capacitor
(C2a), the first auxiliary resonance inductance (L1a)；
The negative busbar polarity resonant network (3) includes the second auxiliary power switching tube (S2a) and the second auxiliary power diodes
(D2a) parallel combination, third blocking power switch tube (S3b) and third blocking power diode (D3b) parallel combination, the 4th blocking
Power switch tube (S4b) and the 4th blocking power diode (D4b) parallel combination, third auxiliary resonance capacitor (C3a), the 4th auxiliary
Resonant capacitance (C4a), the second auxiliary resonance inductance (L2a)。
8. the soft switching inverter circuit according to claim 2 with constant common mode voltage, which is characterized in that described soft
Switching inverter circuit further includes by the 5th power switch tube (S5) and the 5th power diode (D5) parallel combination, the 6th power
Switching tube (S6) and the 6th power diode (D6) parallel combination composition continuous current circuit.
9. a kind of switching sequence control based on the soft switching inverter circuit described in claim 1-8 with constant common mode voltage
Method processed, which is characterized in that positive half cycle, the second power switch tube (S2) and third power switch tube (S3) turn off always, the first function
Rate switching tube (S1) and the 4th power switch tube (S4) driver' s timing having the same, and press Unipolar SPWM mode high frequency mo；
Negative half period, the first power switch tube (S1) and the 4th power switch tube (S4) turn off always, the second power switch tube (S2) and third
Power switch tube (S3) driver' s timing having the same, and press Unipolar SPWM mode high frequency mo.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900894A (en) * | 2020-06-17 | 2020-11-06 | 东南大学 | Zero-voltage conversion non-isolated grid-connected inverter capable of operating with full power factor and switch control time sequence thereof |
| CN116667692A (en) * | 2023-08-02 | 2023-08-29 | 国网江苏省电力有限公司电力科学研究院 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
| CN116683787A (en) * | 2023-08-02 | 2023-09-01 | 国网江苏省电力有限公司电力科学研究院 | Soft switching non-isolated grid-connected inverter circuit capable of running with zero switching loss |
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2018
- 2018-11-22 CN CN201811396501.0A patent/CN109412446A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900894A (en) * | 2020-06-17 | 2020-11-06 | 东南大学 | Zero-voltage conversion non-isolated grid-connected inverter capable of operating with full power factor and switch control time sequence thereof |
| CN111900894B (en) * | 2020-06-17 | 2021-09-21 | 东南大学 | Switch control method of zero-voltage conversion non-isolated grid-connected inverter capable of operating with full power factor |
| CN116667692A (en) * | 2023-08-02 | 2023-08-29 | 国网江苏省电力有限公司电力科学研究院 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
| CN116683787A (en) * | 2023-08-02 | 2023-09-01 | 国网江苏省电力有限公司电力科学研究院 | Soft switching non-isolated grid-connected inverter circuit capable of running with zero switching loss |
| CN116683787B (en) * | 2023-08-02 | 2023-10-03 | 国网江苏省电力有限公司电力科学研究院 | Soft switching non-isolated grid-connected inverter circuit capable of running with zero switching loss |
| CN116667692B (en) * | 2023-08-02 | 2023-10-03 | 国网江苏省电力有限公司电力科学研究院 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
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