CN116667692A - Zero-current conversion full-bridge non-isolated inverter circuit without switching loss - Google Patents
Zero-current conversion full-bridge non-isolated inverter circuit without switching loss Download PDFInfo
- Publication number
- CN116667692A CN116667692A CN202310964833.9A CN202310964833A CN116667692A CN 116667692 A CN116667692 A CN 116667692A CN 202310964833 A CN202310964833 A CN 202310964833A CN 116667692 A CN116667692 A CN 116667692A
- Authority
- CN
- China
- Prior art keywords
- power switch
- power
- switch
- auxiliary
- diode
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 24
- 230000003111 delayed effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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
- 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
- H02M7/53871—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 with automatic control of output voltage or current
-
- 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
- H02M1/0051—Diode reverse recovery losses
-
- 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
- H02M1/08—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
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M7/4815—Resonant converters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a full-bridge non-isolated inverter circuit without switching loss and zero current conversion, which comprises an inverter circuit, a power supply circuit and a power supply circuit. The invention can realize the main switch group S under the corresponding switch control time sequence by adding the resonance network composed of the full-control switch, the resonance capacitor and the resonance inductor 1 ～S 6 Zero-current on and zero-current off, freewheel switch tube S f1 ～S f4 Zero-current on and zero-current off, power switch tube S a1 And S is a2 Zero currentOn and zero current off, auxiliary power diode D a1 ～D a4 Zero current turn-off eliminates the reverse recovery problem of the diode, and the inverter circuit can operate with zero switching loss. The invention makes the non-isolated inverter circuit remove the limit of the switching loss to the switching frequency, and is beneficial to the development of the non-isolated inverter circuit to high frequency and integration.
Description
Technical Field
The invention relates to a full-bridge non-isolated inverter circuit without switching loss and zero current conversion, and belongs to the technical field of soft switching of inverter circuits.
Background
The non-isolated inverter is widely applied in the photovoltaic power generation industry due to simple structure and high efficiency. The existing inverter circuit is typically operated in a hard-switching mode, such as the H6 inverter circuit shown in fig. 1. However, as the switching frequency increases, the switching loss increases, so that the conventional inverter can operate only at a lower switching frequency, which results in a larger passive device being required in the inverter system, thereby increasing the volume and cost of the inverter circuit.
The soft switching technology can overcome the problems, and the soft switching can realize zero-voltage or zero-current switching, so that switching loss is reduced, and compared with hard switching, the soft switching can still maintain higher conversion efficiency under high switching frequency, and can reduce the heat dissipation requirement of an inverter, further improve the reliability and the service life of an inverter system, and in addition, the soft switching can reduce noise and electromagnetic interference, thereby being beneficial to reducing harmonic waves and improving the quality of electric energy.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: how to reduce the switching loss of the non-isolated inverter, keep higher conversion efficiency, and further improve the reliability and service life of the system.
In order to solve the above technical problems, the present invention provides a switching loss-free zero-current conversion full-bridge non-isolated inverter circuit, comprising:
the device comprises a bus capacitor group, a power switch, a follow current switch and an auxiliary resonance network;
the first power switch, the fifth power switch and the second power switch are sequentially connected in series and then connected to two ends of the bus capacitor group;
the third power switch, the sixth power switch and the fourth power switch are sequentially connected in series and then connected to two ends of the bus capacitor group;
the auxiliary resonance network comprises a first auxiliary resonance unit and a second auxiliary resonance unit, and the first auxiliary resonance unit is connected with the second auxiliary resonance unit through an intermediate inductor; the first auxiliary resonance unit is connected to a node between the first power switch and the fifth power switch through a first follow current switch; the first auxiliary resonance unit is connected to a node between the third power switch and the sixth power switch through a third follow current switch; the first auxiliary resonance unit is simultaneously connected to one end of the bus capacitor group;
the second auxiliary resonance unit is connected to a node between the fifth power switch and the second power switch through a second follow current switch; the second auxiliary resonance unit is connected to a node between the sixth power switch and the fourth power switch through a fourth follow current switch; the second auxiliary resonance unit is simultaneously connected to the other end of the bus capacitor group;
the first intake filter inductor, the intake filter capacitor and the second intake filter inductor are sequentially connected in series, and then two ends of the first intake filter inductor and the second intake filter inductor are respectively connected with a node between the first power switch and the fifth power switch and a node between the third power switch and the sixth power switch.
The first power switch comprises a first power switch tube and a first power diode which are connected in parallel.
The second power switch comprises a second power switch tube and a second power diode which are connected in parallel.
The third power switch comprises a third power switch tube and a third power diode which are connected in parallel.
The fourth power switch comprises a fourth power switch tube and a fourth power diode which are connected in parallel.
The fifth power switch comprises a fifth power switch tube and a fifth power diode which are connected in parallel.
The aforementioned zero-current conversion full-bridge non-isolated inverter circuit without switching loss, wherein the sixth power switch comprises a sixth power switch tube and a sixth power diode which are connected in parallel.
In the above-mentioned full-bridge non-isolated inverter circuit with zero current conversion without switching loss, the first freewheeling switch includes a first freewheeling switch tube, and the first freewheeling switch tube is connected in parallel with a diode.
In the foregoing full-bridge non-isolated inverter circuit with zero-current conversion without switching loss, the second freewheeling switch includes a second freewheeling switch tube, and the second freewheeling switch tube is connected in parallel with a diode.
In the foregoing full-bridge non-isolated inverter circuit with zero-current conversion without switching loss, the third freewheeling switch includes a third freewheeling switch tube, and the third freewheeling switch tube is connected in parallel with a diode.
In the foregoing full-bridge non-isolated inverter circuit with zero-current conversion without switching loss, the fourth freewheeling switch includes a fourth freewheeling switch tube connected in parallel with a diode.
The first auxiliary resonance unit comprises a first auxiliary power diode and a second auxiliary power diode, and the cathodes of the first auxiliary power diode and the second auxiliary power diode are connected to a node between the first power switch and the fifth power switch and a node between the third power switch and the sixth power switch through a first follow current switch and a third follow current switch respectively; the positive pole of the second auxiliary power diode is connected to one end of the bus capacitor group through the first auxiliary capacitor and the seventh power switch tube in sequence.
The second auxiliary resonance unit comprises a third auxiliary power diode and a fourth auxiliary power diode, and anodes of the third auxiliary power diode and the fourth auxiliary power diode are connected to a node between the fifth power switch and the second power switch and a node between the sixth power switch and the fourth power switch through a second follow current switch and a fourth follow current switch respectively; the negative electrode of the third auxiliary power diode is connected to the other end of the bus capacitor group through the second auxiliary capacitor and the eighth power switch tube in sequence.
The non-isolated inverter circuit of the zero-current conversion full bridge without switching loss comprises a bus capacitor group.
The non-switching loss zero-current conversion full-bridge non-isolation inverter circuit comprises a bus capacitor group, a first bus capacitor and a second bus capacitor, wherein the bus capacitor group comprises two bus capacitors which are connected in series;
the intermediate inductor comprises a first intermediate inductor and a second intermediate inductor which are connected in series;
the node between the first intermediate inductance and the second intermediate inductance is connected to the node between the first bus capacitance and the second bus capacitance.
The invention has the beneficial effects that: the inverter circuit of the invention can realize the main switch group S under the corresponding switch control time sequence by adding the resonant network composed of the full-control switch, the resonant capacitor and the resonant inductor 1 ～S 6 Zero current on and zero current off, freewheel onClosing tube S f1 ～S f4 Zero-current on and zero-current off, power switch tube S a1 And S is a2 Zero-current on and zero-current off auxiliary power diode D a1 ～D a4 Zero current turn-off eliminates the reverse recovery problem of the diode, and the inverter circuit can operate with zero switching loss. The invention makes the non-isolated inverter circuit remove the limit of the switching loss to the switching frequency, and is beneficial to the development of the non-isolated inverter circuit to high frequency and integration.
When the inverter circuit works, resonance current does not flow through the main switching tube, so that the current amplitude and the conduction loss of the main switching tube are not additionally increased.
The clamping structure in the second embodiment of the inverter circuit clamps the common-mode voltage at half of the input voltage, so that the inverter circuit has the function of eliminating leakage current of a non-isolated inverter system.
Drawings
FIG. 1 is a schematic diagram of a conventional H6 inverter circuit;
fig. 2 is a schematic diagram of a non-isolated grid-connected inverter circuit according to a first embodiment of the present invention;
FIG. 3 is a timing diagram of a switch control according to a first embodiment of the present invention;
FIG. 4 is a diagram showing a theoretical operating waveform during a switching cycle according to an embodiment of the present invention;
FIG. 5 (a) is a schematic diagram of a mode 1 according to an embodiment of the present invention;
FIG. 5 (b) is a schematic diagram of a mode 2 according to an embodiment of the present invention;
FIG. 5 (c) is a schematic diagram of a mode 3 according to an embodiment of the present invention;
FIG. 5 (d) is a schematic diagram of a mode 4 according to an embodiment of the present invention;
FIG. 5 (e) is a schematic diagram of a mode 5 according to an embodiment of the present invention;
FIG. 5 (f) is a schematic diagram of a mode 6 according to an embodiment of the present invention;
FIG. 5 (g) is a schematic diagram of a mode 7 according to an embodiment of the present invention;
FIG. 5 (h) is a schematic diagram of a mode 8 according to an embodiment of the present invention;
fig. 6 (a) shows a first power switch tube S according to an embodiment of the invention 1 Is a working waveform diagram of (1);
fig. 6 (b) shows a seventh power switch tube S according to an embodiment of the invention a1 Is a working waveform diagram of (1);
fig. 6 (c) shows a first auxiliary power diode D according to an embodiment of the invention a1 Is a working waveform diagram of (1);
fig. 6 (D) shows a third auxiliary power diode D according to an embodiment of the present invention a3 Is a working waveform diagram of (1);
FIG. 6 (e) shows a first freewheeling switch S according to an embodiment of the present invention f1 Is a working waveform diagram of (1);
FIG. 6 (f) shows a sixth power switch S according to an embodiment of the present invention 6 Is a working waveform diagram of (1);
fig. 7 is a schematic diagram of a non-isolated grid-connected inverter circuit according to a second embodiment of the present invention.
Symbol and reference name of the drawings:
C dc 、C a1 、C a2 -a busbar capacitance, a first auxiliary capacitance, a second auxiliary capacitance;
S 1 ～S 6 、S a1 、S a2 -a first power switching tube, a second power switching tube, a third power switching tube, a fourth power switching tube, a fifth power switching tube, a sixth power switching tube, a seventh power switching tube, an eighth power switching tube;
D 1 ～D 6 -a first power diode, a second power diode, a third power diode, a fourth power diode, a fifth power diode, a sixth power diode;
D a1 、D a2 、D a3 、D a4 -a first auxiliary power diode, a second auxiliary power diode, a third auxiliary power diode, a fourth auxiliary power diode;
S f1 ～S f4 -a first freewheel switch tube, a second freewheel switch tube, a third freewheel switch tube, a fourth freewheel switch tube;
u g -grid voltage;
U PV -solar panel output voltage;
L 1 、L 2 、L a -a first in-line filter inductance, a second in-line filter inductance, an intermediate inductance;
C f -an in-line filter capacitance.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Fig. 1 is a schematic diagram of an H6 inverter circuit, which is operated as a hard switch. Fig. 2 is a schematic circuit diagram of an embodiment one of a switching loss-free zero-current conversion full-bridge non-isolated inverter circuit according to the present invention, including:
the bus capacitor group 1, the power switch, the follow current switch and the auxiliary resonant network 4;
the first power switch 21, the fifth power switch 25 and the second power switch 22 are sequentially connected in series and then connected to two ends of the bus capacitor group 1;
the third power switch 23, the sixth power switch 26 and the fourth power switch 24 are sequentially connected in series and then connected to two ends of the bus capacitor group 1;
the auxiliary resonance network 4 comprises a first auxiliary resonance unit and a second auxiliary resonance unit, wherein the first auxiliary resonance unit and the second auxiliary resonance unit pass through an intermediate inductance L a Connecting; the first auxiliary resonance unit is connected to a node between the first power switch 21 and the fifth power switch 25 through a first freewheel switch 31; the first auxiliary resonance unit is connected to a node between the third power switch 23 and the sixth power switch 26 through a third freewheel switch 33; the first auxiliary resonance unit is simultaneously connected to one end of the bus capacitor group 1;
the second auxiliary resonance unit is connected to a node between the fifth power switch 25 and the second power switch 22 through a second freewheel switch 32; the second auxiliary resonance unit is connected to a node between the sixth power switch 26 and the fourth power switch 24 through a fourth freewheel switch 34; the second auxiliary resonance unit is simultaneously connected to the other end of the bus capacitor group 1;
first intake filter inductance L 1 Filter capacitor C of in-net f Second in-line filter inductor L 2 The two ends of the series connection are respectively connected with a node between the first power switch 21 and the fifth power switch 25 and a node between the third power switch 23 and the sixth power switch 26.
The first power switch 21 comprises a first power switch tube S connected in parallel 1 And a first power diode D 1 ；
The second power switch 22 comprises a second power switch tube S connected in parallel 2 And a second power diode D 2 ；
The third power switch 23 comprises a third power switch tube S connected in parallel 3 And a third power diode D 3 ；
The fourth power switch 24 includes a fourth power switch tube S connected in parallel 4 And a fourth power diode D 4 ；
The fifth power switch 25 includes a fifth power switch tube S connected in parallel 5 And a fifth power diode D 5 。
The sixth power switch 26 includes a sixth power switch tube S connected in parallel 6 And a sixth power diode D 6 。
The first freewheel switch 31 includes a first freewheel switch tube S f1 First freewheel switch tube S f1 Connected in parallel with a diode;
the second freewheel switch 32 includes a second freewheel switch tube S f2 Second freewheel switch tube S f2 In parallel with a diode.
The third freewheel switch 33 includes a third freewheel switch tube S f3 Third freewheel switch tube S f3 Connected in parallel with a diode;
the fourth freewheel switch 34 includes a fourth freewheel switch tube S f4 Fourth freewheel switch tube S f4 In parallel with a diode.
The first auxiliary resonance unit comprises a first auxiliary power diode D a1 And a second auxiliary power diode D a2， First auxiliary power diode D a1 And a second auxiliary power diode D a2 The negative electrode of the first power switch 21 and the fifth power switch 25 and the third power switch 23 and the sixth power switch 26 are respectively connected to the node between the first follow current switch 31 and the third follow current switch 33; second auxiliary power diode D a2 The positive electrode of (a) sequentially passes through the first auxiliary capacitor C a1 Seventh Power switch tube S a1 Is connected to one end of the busbar capacitance set 1.
The second auxiliary resonance unit comprises a third auxiliary power diode D a3 And a fourth auxiliary power diode D a4 Third auxiliary power diode D a3 And a fourth auxiliary power diode D a4 The positive electrode of the fifth power switch 25 and the second power switch 22, and the sixth power switch 26 and the fourth power switch 24 are respectively connected to the node between the fifth power switch 32 and the second power switch 22 through a second follow current switch 34; third auxiliary power diode D a3 The negative electrode of (C) sequentially passes through the second auxiliary capacitor C a2 Eighth power switch tube S a2 Is connected to the other end of the busbar capacitance set 1.
The bus capacitor group comprises a bus capacitor.
Fig. 3 is a schematic diagram of a first power switch tube S according to an embodiment of the present invention 1 And a fourth power switch tube S 4 A second power switch tube S which is operated at high frequency in the positive half cycle and is always turned off in the negative half cycle of the network current 2 And a third power switch tube S 3 High-frequency action is performed at the negative half cycle of the network access current, and the power supply is always turned off at the positive half cycle; sixth power switching tube S 6 First freewheel switch tube S f1 And a fourth freewheel switching tube S f4 The current is always on in the positive half cycle and is always off in the negative half cycle of the network access current; fifth power switch tube S 5 Second freewheel switch tube S f2 And a third freewheel switch tube S f3 The current is always on in the negative half cycle of the network access current and is always off in the positive half cycle; seventh Power switch tube S a1 And eighth workRate switching tube S a2 The high-frequency switch acts in the whole period. Seventh Power switch tube S a1 And an eighth power switching tube S a2 Is delayed from the first power switch S 1 Second power switch tube S 2 Third power switch tube S 3 Fourth power switching tube S 4 The on-time and the off-time are the same.
Fig. 4 is a theoretical operating waveform diagram of a high frequency switching cycle scale according to an embodiment of the present invention, and fig. 5 (a) to 5 (h) are equivalent operating mode diagrams of modes 1 to 8 in one switching cycle according to an embodiment of the present invention.
A specific example of the first embodiment is as follows: output voltage U of solar panel PV =400V, grid voltage u g =220 VRMS, grid frequency f g =50hz, rated power pn=1000w, bus capacitor C dc =470 μf; inlet filter inductance L 1 =l2=0.5 mH; filter capacitance c1=2.2 μf; panel-to-ground parasitic capacitance cpv1=cpv2=0.15 μf; switching frequency f=50 kHz, resonance parameter L r ＝12μH、C r ＝47nF。
From the implementation results shown in fig. 6 (a) to 6 (f), it can be seen that the first power switch tube S can be implemented in the case that the circuit structure shown in fig. 2 is matched with the switch control timing shown in fig. 3 1 Second power switch tube S 2 Third power switch tube S 3 Fourth power switching tube S 4 Zero-current on and zero-current off, seventh power switching tube S a1 Eighth power switch tube S a2 Zero-current on and zero-current off of the first auxiliary power diode D a1 Second auxiliary power diode D a2 Third auxiliary power diode D a3 Fourth auxiliary power diode D a4 Zero current turn-off eliminates reverse recovery problems in the power diode.
Example two
Fig. 7 shows a circuit of a second embodiment of the present invention, a switching loss-free zero-current conversion full-bridge non-isolated inverter circuit, comprising:
the bus capacitor group 1, the power switch, the follow current switch and the auxiliary resonant network 4;
the first power switch 21, the fifth power switch 25 and the second power switch 22 are sequentially connected in series and then connected to two ends of the bus capacitor group 1;
the third power switch 23, the sixth power switch 26 and the fourth power switch 24 are sequentially connected in series and then connected to two ends of the bus capacitor group 1;
the auxiliary resonance network 4 comprises a first auxiliary resonance unit and a second auxiliary resonance unit, wherein the first auxiliary resonance unit and the second auxiliary resonance unit pass through an intermediate inductance L a Connecting; the first auxiliary resonance unit is connected to a node between the first power switch 21 and the fifth power switch 25 through a first freewheel switch 31; the first auxiliary resonance unit is connected to a node between the third power switch 23 and the sixth power switch 26 through a third freewheel switch 33; the first auxiliary resonance unit is simultaneously connected to one end of the bus capacitor group 1;
the second auxiliary resonance unit is connected to a node between the fifth power switch 25 and the second power switch 22 through a second freewheel switch 32; the second auxiliary resonance unit is connected to a node between the sixth power switch 26 and the fourth power switch 24 through a fourth freewheel switch 34; the second auxiliary resonance unit is simultaneously connected to the other end of the bus capacitor group 1;
first intake filter inductance L 1 Filter capacitor C of in-net f Second in-line filter inductor L 2 The two ends of the series connection are respectively connected with a node between the first power switch 21 and the fifth power switch 25 and a node between the third power switch 23 and the sixth power switch 26.
The first power switch 21 comprises a first power switch tube S connected in parallel 1 And a first power diode D 1 ；
The second power switch 22 comprises a second power switch tube S connected in parallel 2 And a second power diode D 2 ；
The third power switch 23 comprises a third power switch tube S connected in parallel 3 And a third power diode D 3 ；
The fourth power switch 24 includes a first power switch connected in parallelFour-power switching tube S 4 And a fourth power diode D 4 ；
The fifth power switch 25 includes a fifth power switch tube S connected in parallel 5 And a fifth power diode D 5 。
The sixth power switch 26 includes a sixth power switch tube S connected in parallel 6 And a sixth power diode D 6 。
The first freewheel switch 31 includes a first freewheel switch tube S f1 First freewheel switch tube S f1 Connected in parallel with a diode;
the second freewheel switch 32 includes a second freewheel switch tube S f2 Second freewheel switch tube S f2 In parallel with a diode.
The third freewheel switch 33 includes a third freewheel switch tube S f3 Third freewheel switch tube S f3 Connected in parallel with a diode;
the fourth freewheel switch 34 includes a fourth freewheel switch tube S f4 Fourth freewheel switch tube S f4 In parallel with a diode.
The first auxiliary resonance unit comprises a first auxiliary power diode D a1 And a second auxiliary power diode D a2， First auxiliary power diode D a1 And a second auxiliary power diode D a2 The negative electrode of the first power switch 21 and the fifth power switch 25 and the third power switch 23 and the sixth power switch 26 are respectively connected to the node between the first follow current switch 31 and the third follow current switch 33; second auxiliary power diode D a2 The positive electrode of (a) sequentially passes through the first auxiliary capacitor C a1 Seventh Power switch tube S a1 Is connected to one end of the busbar capacitance set 1.
The second auxiliary resonance unit comprises a third auxiliary power diode D a3 And a fourth auxiliary power diode D a4 Third auxiliary power diode D a3 And a fourth auxiliary power diode D a4 The positive electrode of the first power switch is connected to the node between the fifth power switch 25 and the second power switch 22 and the sixth power switch through the second follow current switch 32 and the fourth follow current switch 34 respectivelyA node between the switch 26 and the fourth power switch 24; third auxiliary power diode D a3 The negative electrode of (C) sequentially passes through the second auxiliary capacitor C a2 Eighth power switch tube S a2 Is connected to the other end of the busbar capacitance set 1.
The bus capacitor group 1 comprises two bus capacitors which are connected in series and are respectively a first bus capacitor C dc1 And a second bus capacitor C dc2 ；
The intermediate inductance comprises a first intermediate inductance L connected in series a1 Second intermediate inductance L a2 ；
First intermediate inductance L a1 And a second intermediate inductance L a2 The node between is connected to the first bus capacitor C dc1 And a second bus capacitor C dc2 A node therebetween.
The second embodiment of the present invention provides a switch control timing sequence, a first power switch tube S 1 And a fourth power switch tube S 4 A second power switch tube S which is operated at high frequency in the positive half cycle and is always turned off in the negative half cycle of the network current 2 And a third power switch tube S 3 High-frequency action is performed at the negative half cycle of the network access current, and the power supply is always turned off at the positive half cycle; sixth power switching tube S 6 First freewheel switch tube S f1 And a fourth freewheel switching tube S f4 The current is always on in the positive half cycle and is always off in the negative half cycle of the network access current; fifth power switch tube S 5 Second freewheel switch tube S f2 And a third freewheel switch tube S f3 The current is always on in the negative half cycle of the network access current and is always off in the positive half cycle; seventh Power switch tube S a1 And an eighth power switching tube S a2 The high-frequency switch acts in the whole period. Seventh Power switch tube S a1 And an eighth power switching tube S a2 Is delayed from the first power switch S 1 Second power switch tube S 2 Third power switch tube S 3 Fourth power switching tube S 4 The on-time and the off-time are the same.
In the case that the circuit structure shown in fig. 7 is matched with the switch control timing shown in fig. 3, the first power switch tube S may be implemented 1 Second power switch tube S 2 Third power switch tube S 3 Fourth power switching tube S 4 Zero-current on and zero-current off, seventh power switching tube S a1 Eighth power switch tube S a2 Zero-current on and zero-current off of the first auxiliary power diode D a1 Second auxiliary power diode D a2 Third auxiliary power diode D a3 Fourth auxiliary power diode D a4 Zero current turn-off eliminates reverse recovery problems in the power diode. The clamping structure can ensure that the common-mode voltage of the inverter is kept at half of the battery voltage in the power transmission, resonance phase and follow current phase.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (15)
1. The utility model provides a no switching loss zero current conversion full bridge type non-isolated inverter circuit which characterized in that includes:
the bus capacitor group (1), the power switch, the follow current switch and the auxiliary resonant network (4);
the first power switch (21), the fifth power switch (25) and the second power switch (22) are sequentially connected in series and then connected to two ends of the bus capacitor group (1);
the third power switch (23), the sixth power switch (26) and the fourth power switch (24) are sequentially connected in series and then connected to two ends of the bus capacitor group (1);
the auxiliary resonance network (4) comprises a first auxiliary resonance unit and a second auxiliary resonance unit, and the first auxiliary resonance unit is connected with the second auxiliary resonance unit through an intermediate inductor; the first auxiliary resonance unit is connected to a node between the first power switch (21) and the fifth power switch (25) through a first freewheel switch (31); the first auxiliary resonance unit is connected to a node between the third power switch (23) and the sixth power switch (26) through a third follow current switch (33); the first auxiliary resonance unit is simultaneously connected to one end of the bus capacitor group (1);
the second auxiliary resonance unit is connected to a node between the fifth power switch (25) and the second power switch (22) through a second follow current switch (32); the second auxiliary resonance unit is connected to a node between the sixth power switch (26) and the fourth power switch (24) through a fourth follow current switch (34); the second auxiliary resonance unit is simultaneously connected to the other end of the bus capacitor group (1);
first intake filter inductance (L) 1 ) Filter capacitor of in-line (C) f ) Second in-line filter inductor (L 2 ) The two ends of the series connection are respectively connected with a node between the first power switch (21) and the fifth power switch (25) and a node between the third power switch (23) and the sixth power switch (26).
2. The switching loss-free zero current conversion full-bridge non-isolated inverter circuit of claim 1, the first power switch (21) comprising a first power switch tube (S 1 ) And a first power diode (D 1 ）。
3. The switching loss-free zero current conversion full-bridge non-isolated inverter circuit of claim 1, the second power switch (22) comprising a second power switch tube (S 2 ) And a second power diode (D 2 ）。
4. The switching loss-free zero current conversion full-bridge non-isolated inverter circuit of claim 1, the third power switch (23) comprising a third power switch tube (S 3 ) And a third power diode (D 3 ）。
5. The method according to claim 1A switching loss-free zero-current conversion full-bridge non-isolated inverter circuit, the fourth power switch (24) comprising fourth power switching transistors (S) connected in parallel 4 ) And a fourth power diode (D 4 ）。
6. The switching loss-free zero current conversion full-bridge non-isolated inverter circuit of claim 1, the fifth power switch (25) comprising a fifth power switch tube (S 5 ) And a fifth power diode (D 5 ）。
7. The switching loss-free zero current conversion full-bridge non-isolated inverter circuit of claim 1, the sixth power switch (26) comprising a sixth power switch tube (S 6 ) And a sixth power diode (D 6 ）。
8. A switching loss-free zero current conversion full-bridge non-isolated inverter circuit according to claim 1, the first freewheel switch (31) comprising a first freewheel switch tube (S f1 ) First freewheel switch tube (S) f1 ) In parallel with a diode.
9. A switching loss-free zero current conversion full-bridge non-isolated inverter circuit according to claim 1, the second freewheel switch (32) comprising a second freewheel switch tube (S f2 ) Second freewheel switch tube (S) f2 ) In parallel with a diode.
10. A switching loss-free zero current conversion full-bridge non-isolated inverter circuit according to claim 1, the third freewheel switch (33) comprising a third freewheel switch tube (S f3 ) Third freewheel switch tube (S) f3 ) In parallel with a diode.
11. The non-isolated inverter circuit of claim 1,the fourth freewheel switch (34) includes a fourth freewheel switch tube (S) f4 ) Fourth freewheel switch tube (S) f4 ) In parallel with a diode.
12. A switching loss-free zero current conversion full bridge non-isolated inverter circuit according to claim 1, the first auxiliary resonant unit comprising a first auxiliary power diode (D a1 ) And a second auxiliary power diode (D a2 ) A first auxiliary power diode (D a1 ) And a second auxiliary power diode (D a2 ) The negative electrode of the first power switch (21) and the fifth power switch (25) and the third power switch (23) and the sixth power switch (26) are respectively connected to the node between the first follow current switch (31) and the third follow current switch (33); second auxiliary power diode (D) a2 ) The positive electrode of (a) sequentially passes through the first auxiliary capacitor (C a1 ) Seventh Power switch tube (S) a1 ) Is connected to one end of the bus capacitor group (1).
13. A switching loss-free zero current conversion full bridge non-isolated inverter circuit according to claim 1, the second auxiliary resonant unit comprising a third auxiliary power diode (D a3 ) And a fourth auxiliary power diode (D a4 ) Third auxiliary power diode (D a3 ) And a fourth auxiliary power diode (D a4 ) The positive electrode of the power supply is connected to a node between the fifth power switch (25) and the second power switch (22) and a node between the sixth power switch (26) and the fourth power switch (24) through a second follow current switch (32) and a fourth follow current switch (34) respectively; third auxiliary power diode (D) a3 ) The negative electrode of (C) sequentially passes through a second auxiliary capacitor (C a2 ) Eighth power switch tube (S) a2 ) Is connected to the other end of the bus capacitor group (1).
14. A switching loss-free zero current conversion full bridge non-isolated inverter circuit according to claim 1, the bus capacitor bank (1) comprising a bus capacitor.
15. The full-bridge non-isolated inverter circuit of claim 1, wherein the bus capacitor group comprises two bus capacitors connected in series, each of the bus capacitors being a first bus capacitor (C dc1 ) And a second bus capacitor (C dc2 ）；
The intermediate inductance comprises a first intermediate inductance (L a1 ) A second intermediate inductance (L a2 ）；
First intermediate inductance (L a1 ) And a second intermediate inductance (L a2 ) The node between is connected to a first bus capacitor (C dc1 ) And a second bus capacitor (C) dc2 ) A node therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310964833.9A CN116667692B (en) | 2023-08-02 | 2023-08-02 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310964833.9A CN116667692B (en) | 2023-08-02 | 2023-08-02 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116667692A true CN116667692A (en) | 2023-08-29 |
| CN116667692B CN116667692B (en) | 2023-10-03 |
Family
ID=87714035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310964833.9A Active CN116667692B (en) | 2023-08-02 | 2023-08-02 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116667692B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08308245A (en) * | 1995-03-03 | 1996-11-22 | Sanken Electric Co Ltd | Bridge type inverter |
| CN104242719A (en) * | 2014-08-07 | 2014-12-24 | 东南大学 | Switching-loss-free full-bridge non-isolated photovoltaic grid-connected inverter and on-off control timing sequence |
| CN104242716A (en) * | 2014-08-07 | 2014-12-24 | 东南大学 | High-reliability non-switching-loss type non-isolated inverter and switching control time sequence thereof |
| CN104753384A (en) * | 2015-03-19 | 2015-07-01 | 江苏大学 | Improved zero-current converting H6 structural non-isolation photovoltaic grid-connected inverter and control method thereof |
| CN105186914A (en) * | 2015-08-14 | 2015-12-23 | 安徽大学 | Novel H6 single-phase non-isolation grid-connected inverter |
| CN106533224A (en) * | 2016-12-08 | 2017-03-22 | 东北大学 | Novel resonant DC-link soft switching inverter and modulation method thereof |
| WO2017190007A1 (en) * | 2016-04-29 | 2017-11-02 | Massachusetts Institute Of Technology | Wide-operating-range resonant-transition soft-switched converter |
| CN109412446A (en) * | 2018-11-22 | 2019-03-01 | 东南大学 | Soft switching inverter circuit with constant common mode voltage |
| CN110011556A (en) * | 2019-05-13 | 2019-07-12 | 郑州大学 | A kind of non-isolated neutral-point-clamped photovoltaic combining inverter and its modulator approach |
| CN110198131A (en) * | 2019-06-06 | 2019-09-03 | 东南大学 | It is a kind of can total power factor operation without the non-isolated inverter of switching loss type |
| US20200052604A1 (en) * | 2018-08-13 | 2020-02-13 | University Of Central Florida Research Foundation, Inc. | Multi-input single-resonant tank llc converter |
| 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 |
-
2023
- 2023-08-02 CN CN202310964833.9A patent/CN116667692B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08308245A (en) * | 1995-03-03 | 1996-11-22 | Sanken Electric Co Ltd | Bridge type inverter |
| CN104242719A (en) * | 2014-08-07 | 2014-12-24 | 东南大学 | Switching-loss-free full-bridge non-isolated photovoltaic grid-connected inverter and on-off control timing sequence |
| CN104242716A (en) * | 2014-08-07 | 2014-12-24 | 东南大学 | High-reliability non-switching-loss type non-isolated inverter and switching control time sequence thereof |
| CN104753384A (en) * | 2015-03-19 | 2015-07-01 | 江苏大学 | Improved zero-current converting H6 structural non-isolation photovoltaic grid-connected inverter and control method thereof |
| CN105186914A (en) * | 2015-08-14 | 2015-12-23 | 安徽大学 | Novel H6 single-phase non-isolation grid-connected inverter |
| WO2017190007A1 (en) * | 2016-04-29 | 2017-11-02 | Massachusetts Institute Of Technology | Wide-operating-range resonant-transition soft-switched converter |
| CN106533224A (en) * | 2016-12-08 | 2017-03-22 | 东北大学 | Novel resonant DC-link soft switching inverter and modulation method thereof |
| US20200052604A1 (en) * | 2018-08-13 | 2020-02-13 | University Of Central Florida Research Foundation, Inc. | Multi-input single-resonant tank llc converter |
| CN109412446A (en) * | 2018-11-22 | 2019-03-01 | 东南大学 | Soft switching inverter circuit with constant common mode voltage |
| CN110011556A (en) * | 2019-05-13 | 2019-07-12 | 郑州大学 | A kind of non-isolated neutral-point-clamped photovoltaic combining inverter and its modulator approach |
| CN110198131A (en) * | 2019-06-06 | 2019-09-03 | 东南大学 | It is a kind of can total power factor operation without the non-isolated inverter of switching loss type |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116667692B (en) | 2023-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108448913B (en) | Single-stage isolated AC-DC converter based on staggered parallel bridgeless PFC circuit and LLC resonance | |
| CN108900100B (en) | A kind of single-phase high efficiency high frequency isolated form rectifier | |
| CN103051233B (en) | Non-isolated single-phase photovoltaic grid-connected inverter and on-off control timing sequence thereof | |
| CN103944397A (en) | Boost type isolated DC/DC converter and control method thereof | |
| CN110649805B (en) | High-gain Boost converter | |
| CN206237330U (en) | A kind of non-isolated miniature photovoltaic grid-connected inverter | |
| CN109742965A (en) | A kind of high-frequency isolation type AC-DC converter of single-phase crisscross parallel three level resonance formula | |
| CN111049182B (en) | Five-level common-ground type single-phase non-isolated photovoltaic grid-connected inverter circuit and modulation method thereof | |
| CN109842299A (en) | Combined DC transformation system and its control method | |
| CN201259535Y (en) | A DC electric power used for large current transducer check | |
| CN102347697B (en) | Direct DC-AC (direct current-alternating current) converting circuit for low-voltage input full bridge inverter | |
| CN101478249A (en) | A DC electric power used for large current transducer check | |
| CN201994843U (en) | Power factor corrector for soft switch | |
| CN116667692B (en) | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss | |
| EP2747265A1 (en) | Highly efficient inverter | |
| CN214480325U (en) | Circuit structure of single-phase converter | |
| CN116683787B (en) | Soft switching non-isolated grid-connected inverter circuit capable of running with zero switching loss | |
| CN114759802A (en) | ZVZCS full-bridge three-level DCDC converter | |
| CN201781429U (en) | Low-voltage input direct DC-AC conversion circuit adopting full-bridge inversion | |
| CN110061523B (en) | Multifunctional single-phase grid-connected inversion system and method with novel topological structure | |
| CN112994500A (en) | Single-stage single-phase asymmetric full-bridge inverter | |
| CN108111039B (en) | A kind of high efficiency miniature photovoltaic grid-connected inverter inhibiting input low-frequency ripple | |
| CN108123635B (en) | One kind zero inputs ripple and polarity inverts output type Miniature inverter | |
| CN110783951A (en) | Flyback grid-connected inverter with low-frequency ripple suppression function | |
| CN117060709B (en) | Single-stage bridgeless isolated Zeta type power factor correction circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |