CN109687749B - Boost three-leg inverter and boost regulation method - Google Patents
Boost three-leg inverter and boost regulation method Download PDFInfo
- Publication number
- CN109687749B CN109687749B CN201910070874.7A CN201910070874A CN109687749B CN 109687749 B CN109687749 B CN 109687749B CN 201910070874 A CN201910070874 A CN 201910070874A CN 109687749 B CN109687749 B CN 109687749B
- Authority
- CN
- China
- Prior art keywords
- module
- bridge arm
- bridge
- boost
- pin
- 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
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000002955 isolation Methods 0.000 claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 32
- 239000003990 capacitor Substances 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000003993 interaction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 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
-
- 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
- H02M1/126—Arrangements for reducing harmonics from AC input or output using passive filters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
A boost three-bridge arm inverter and a boost regulation method. In a 380V system, the withstand voltage of a power tube is generally above 800V, the lower tube of the full-bridge inverter circuit often generates serious heat, and the content of harmonic waves in a power grid is also high. The power supply device comprises a power supply device module (101), wherein the power supply device module is connected with a push-pull boosting module (102), the push-pull boosting module is connected with a rectifying and filtering module (103), the rectifying and filtering module is connected with a three-bridge arm inversion bridge module (104), the three-bridge arm inversion bridge module is connected with an LCL filtering module (105), and the power supply device module, the push-pull boosting module and the LCL filtering module respectively output signals to an A/D conversion end of a DSP main controller (108), and PWM output ports of the DSP main controller are respectively connected with an isolation driving module A (107) and an isolation driving module B (111). The invention is applied to a boost three-bridge arm inverter.
Description
Technical Field
The invention relates to a boosting three-bridge arm inverter and a boosting adjusting method.
Background
The inverter is equipment for converting direct current into alternating current, is often applied to an active filter, a reactive compensator and a high-voltage frequency conversion device, is generally higher in withstand voltage of a selected power tube, is generally higher than 800V in a 380V system, and has the function of current follow current in a lower tube of a long-adopted full-bridge inverter circuit, so that the calorific value of the lower tube is serious, and the full-bridge inverter circuit and the power grid exchange energy when the system is connected into the power grid, so that the content of harmonic waves in the power grid is improved.
Therefore, how to provide an inverter circuit topology energy, reduce the cost of the circuit, improve the conversion efficiency, reduce the withstand voltage of the power tube and change the follow current loop at the same time is the focus of research in the field.
Fig. 2 shows a general full-bridge inverter topology structure, in a 380V system, the withstand voltage of a power tube is generally above 800V, and a lower tube of a long-adopted full-bridge inverter circuit has the function of current follow current, so that the heating value of the lower tube is often serious, when the converter 102 in fig. 1 is non-isolated, the power supply load 101 is a solar panel, leakage current is generated, and when electric equipment is commonly grounded, a discharge loop is generated.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a boost three-bridge arm inverter and a boost adjusting method.
The above object is achieved by the following technical scheme:
The boost three-bridge arm inverter comprises a power supply equipment module, wherein the power supply equipment module is connected with a push-pull boost module, the push-pull boost module is connected with a rectifying and filtering module, the rectifying and filtering module is connected with a three-bridge arm inverter bridge module, the three-bridge arm inverter bridge module is connected with an LCL filtering module, and the LCL filtering module is connected with a power supply load;
the power supply equipment module, the push-pull boosting module and the LCL filtering module respectively output signals to an A/D conversion end of the DSP main controller, a PWM output port of the DSP main controller is respectively connected with the isolation driving module A and the isolation driving module B, the isolation driving module A is connected with the push-pull boosting module, the isolation driving module B is connected with the three-bridge arm inversion bridge module, the DSP main controller is connected with the data communication module, the data communication module is connected with the upper computer module, and the isolation driving module A and the isolation driving module B have the same structure.
The boost three-bridge arm inverter is characterized in that the isolation driving module comprises a signal conversion module, the signal conversion module is respectively connected with the driving module, the voltage rectification filtering module and the DSP main controller, the voltage rectification filtering module feeds voltage subjected to voltage rectification back to the IC control module through coupling of electric isolation signals, the IC control module is connected with the power conversion circuit module, and the power conversion circuit module is connected with the voltage rectification filtering module.
The boosting three-bridge arm inverter comprises a left bridge arm, a middle bridge arm and a right bridge arm, wherein the left bridge arm comprises a MOS tube Q1 and a MOS tube Q2, the middle bridge arm comprises an IGBT tube QT1, an IGBT tube QT2, a MOS tube Q3 and a MOS tube Q4, and the right bridge arm comprises a MOS tube Q5 and a MOS tube Q6;
The drain electrode pin L1 of the left bridge arm MOS tube Q1 is connected with the positive input end of the capacitor, and the source electrode L2 pin of the left bridge arm MOS tube Q2 is connected with the negative input end of the capacitor;
The source L3 pin of the MOS tube Q1 of the left bridge arm is connected with the drain M1 pin of the MOS tube Q3 of the middle bridge arm and the collector M2 pin of the IGBT tube QT2 of the middle bridge arm;
The drain electrode L4 pin of the MOS tube Q2 of the left bridge arm is connected with the M3 of the middle bridge arm, and the M3 is simultaneously connected with the emitter electrode pin of the IGBT tube QT2 of the middle bridge arm and the source electrode of the MOS tube Q4 of the middle bridge arm;
The drain electrode pin R1 of the MOS tube Q5 of the right bridge arm is connected with the positive input end of the capacitor, and the source electrode R2 pin of the MOS tube Q6 of the right bridge arm is connected with the negative input end of the capacitor;
The source electrode R3 pin of the right bridge arm MOS tube Q5 is connected with the collector electrode pin M4 of the middle bridge arm IGBT tube QT1 and the drain electrode M5 of the middle bridge arm MOS tube Q4, the drain electrode R4 pin of the right bridge arm MOS tube Q6 is connected with the M6, and the M6 is simultaneously connected with the source electrode of the MOS tube Q3 of the middle bridge arm and the emitter electrode pin of the middle bridge arm IGBT tube QT 1;
The upper computer module is connected, and the isolation driving module A and the isolation driving module B have the same structure.
In the boosting regulation method of the boosting three-bridge arm inverter, the power supply equipment is connected with the high-frequency switch boosting circuit, then connected with the three-bridge arm inverter bridge through the rectification filter circuit and finally connected with a power grid or a load;
the storage battery push-pull boost circuit outputs alternating current through the three-bridge arm inverter bridge finally through the rectification filter circuit, the DSP sampling pin is connected to the power sampling part, the DSP outputs PWM driving waveforms to the isolation driving circuit respectively, and the push-pull boost circuit and the power tube of the three-bridge arm inverter bridge are controlled through isolation and power amplification of the isolation driving circuit;
The front feedback end of the main control DSP acquires output signals after rectifying and filtering of the step-up transformer, the rear feedback end acquires voltage and current signals and grid-connected voltage signals output by the inverter, a driving waveform is generated through feedback, the driving waveform controls the left bridge arm, the middle bridge arm and the right bridge arm of the three-bridge arm inverter in real time, the communication end of the main control DSP is connected with the communication end of the FPGA through 16bit data lines, and the FPGA is connected with the server and the display interface through 4G wireless transmission.
According to the boosting regulation method of the boosting three-bridge arm inverter, an isolation driving module comprises a control IC part, the IC part is connected to the input end of a power conversion part, the output end of the power conversion part is connected with the input end of waveform rectification, the output end of the waveform rectification is connected with the input end of voltage feedback, the output end of the voltage feedback is connected to a feedback pin of the control IC, the output end of the waveform rectification is simultaneously connected to a bipolar voltage receiving end of signal conversion, the input driving pin of the signal conversion is connected with a DSP driving signal, the output pin of the signal conversion is connected with a power switch tube, and the driving signal of the DSP converts a unipolar power supply into bipolar voltage driving output through the isolation driving module.
Advantageous effects
According to the invention, a three-bridge arm inversion topology is adopted, two MOS (metal oxide semiconductor) tubes and two IGBT (insulated gate bipolar transistor) tubes are introduced on the basis of a traditional full-bridge inversion circuit, when a follow current loop is formed, a direct current side and a power grid side are isolated, power grid harmonic wave caused by follow current is greatly reduced, and the withstand voltage of two MOS tubes Q1 and Q6 positioned at the lower end can be half of the withstand voltage value of MOS tubes Q1 and Q5 positioned at the upper end. The invention has the advantages of simple topology control, low cost, low THD matched with unipolar modulation, and the like. Meanwhile, an isolation driving circuit is adopted, the isolation driving circuit completely isolates the driving of the DSP and the power part, the difficulty of board arrangement is greatly reduced, the driving system can meet the driving requirement only by one power supply, the interference of the power part is prevented from entering the DSP driving part, and the stability of long-time operation is greatly improved.
The invention comprises an inversion part, a push-pull boosting part, a rectifying and filtering part, a power feedback part, an isolation driving part and an externally controlled DSP (digital signal processor), wherein the storage battery push-pull boosting circuit outputs alternating current through a novel three-bridge arm inversion bridge through the rectifying and filtering circuit, a DSP sampling pin is connected to the power sampling part, the DSP outputs PWM driving waveforms to the isolation driving circuit respectively, and the push-pull boosting circuit and the power tubes of the three-bridge arm inversion bridge are controlled through isolation and power amplification of the isolation driving circuit. The invention reduces the withstand voltage of the lower tube, reduces the loss by changing the follow current loop of the inverter, reduces the output voltage ripple, improves the system efficiency and improves the stability of the system.
Drawings
Fig. 1 is a schematic block diagram of an inverter circuit of the present invention.
Fig. 2 is a diagram of a conventional H4 single-phase inverter circuit.
Fig. 3 is a schematic circuit diagram of the three-leg inverter bridge of the present invention.
Fig. 4 is a schematic diagram of current flow when the positive half-cycle capacitor of the three-bridge inverter provides power to the load.
Fig. 5 is a schematic diagram of current flow during positive half-cycle freewheeling of the three-leg inverter bridge according to the present invention.
Fig. 6 is a schematic diagram of current flow when the negative half-cycle capacitor of the three-leg inverter provides power to a load.
Fig. 7 is a schematic diagram of current flow during negative half-cycle freewheeling of the three-leg inverter bridge of the present invention.
Fig. 8 is an isolated drive schematic block diagram of an isolated drive module of the present invention.
Fig. 9 is a flowchart of the operation of the present invention.
Detailed Description
Example 1:
The boost three-bridge arm inverter comprises a power supply equipment module, wherein the power supply equipment module is connected with a push-pull boost module, the push-pull boost module is connected with a rectifying and filtering module, the rectifying and filtering module is connected with a three-bridge arm inverter bridge module, the three-bridge arm inverter bridge module is connected with an LCL filtering module, and the LCL filtering module is connected with a power supply load;
the power supply equipment module, the push-pull boosting module and the LCL filtering module respectively output signals to an A/D conversion end of the DSP main controller, a PWM output port of the DSP main controller is respectively connected with the isolation driving module A and the isolation driving module B, the isolation driving module A is connected with the push-pull boosting module, the isolation driving module B is connected with the three-bridge arm inversion bridge module, the DSP main controller is connected with the data communication module, the data communication module is connected with the upper computer module, and the isolation driving module A and the isolation driving module B have the same structure.
And the power supply equipment module 101 is used for connecting a storage battery, a solar panel or other low-voltage power source with the voltage range of 12V to 48V into the power supply equipment module, wherein one part of the power supply equipment module is used for converting the power supply voltage of the control system with 15V and the input power supply for isolated driving, and the other part of the power supply equipment module is used for supplying the voltage to the boosting topology.
The push-pull boosting module 102 converts the low-voltage direct current into high-voltage alternating current by the driving output of the DSP and completely electrically isolates the low-voltage direct current part and the high-voltage alternating current part.
And the rectification filter module 103 converts the high-voltage alternating current into alternating current through a fast recovery diode and a filter capacitor, so as to ensure the stability of direct current power supply.
And the three-bridge arm inversion bridge module 104 is used for driving the direct current to generate and isolate the output of the driving to enable the bridge arms to be respectively conducted, and converting the direct current into the needed high-frequency alternating current.
The LCL filtering module 105 filters the high-frequency alternating current through LCL low-pass filtering to remove high-frequency harmonic waves and outputs a sinusoidal alternating current signal.
The alternating current generated by the inverter can be directly connected with a power grid to provide electric energy or connected with electric equipment to be used.
And the isolation driving module A107 and the isolation driving module B111 are used for driving the driving waveforms input by the DSP and the power tubes corresponding to the three bridge arms through voltage and power conversion.
The main controller DSP module 108, DSP, controls the power tubes of the boost module and the switching tubes in the bridge arms of the inverter bridge by sampling the output voltage of the boost transformer and sampling the output current voltage of the inverter bridge.
The data communication module 109 is mainly responsible for data communication, realizes data interaction of a far end, and improves the operation processing speed of the DSP.
The upper computer module 110 is used for remotely monitoring and controlling the output state of the inverter through the upper computer to realize the man-machine interaction function.
Example 2:
According to the boost three-bridge arm inverter of embodiment 1, the isolation driving module comprises a signal conversion module, the signal conversion module is respectively connected with the driving module, the voltage rectification filtering module and the DSP main controller, the voltage rectification filtering module feeds voltage after voltage rectification back to the IC control module through coupling of electric isolation signals, the IC control module is connected with the power conversion circuit module, and the power conversion circuit module is connected with the voltage rectification filtering module.
Fig. 8 is a schematic block diagram of an isolated drive, comprising:
the main control IC module 301 controls PWM output through IC and performs chip enable, overvoltage, undervoltage, overcurrent and other control.
The power conversion module 302 controls the power part through the output of the PWM, and excites and demagnetizes the transformer through the high frequency PWM.
The voltage rectifying part 303 performs rectifying and filtering on the voltage and current coupled by the transformer and converts the voltage and current into +15V,0V and-15V direct current voltage.
And the isolation feedback part 304 feeds back the voltage after voltage rectification to the main control IC module through coupling of the electric isolation signals, and stabilizes voltage.
The signal conversion module 305 is that pins 1 and 2 of the signal module are connected with PWM signals output by the DSP, 3,4 and 5 of the signal module are connected with +15V,0V and-15V direct current voltages of the voltage rectifying part, and pins 6 and 7 of the signal module are outputs of signals.
And the driving module 306 is characterized in that pins 1 and 2 of the driving module are connected with pins 6 and 7 of the signal module, and pins 3 and 4 of the driving module are respectively connected with the grid electrode and the drain electrode of the MOS tube or the base electrode and the emitter electrode of the IGBT tube.
Example 3:
according to the boost three-leg inverter described in embodiment 1 or 2, the three-leg inverter module includes a left leg, an intermediate leg and a right leg, the left leg includes a MOS tube Q1 and a MOS tube Q2, the intermediate leg includes an IGBT tube QT1, an IGBT tube QT2, a MOS tube Q3 and a MOS tube Q4, the right leg includes a MOS tube Q5 and a MOS tube Q6, a pin L1 of the left leg is connected to a positive input terminal of a capacitor, a pin L2 of the left leg is connected to a negative input terminal of the capacitor, a pin L3 of the left leg is connected to M1 and M2 of the intermediate leg, a pin L4 of the left leg is connected to M3 of the intermediate leg, a pin R1 of the right leg is connected to a positive input terminal of the capacitor, a pin R3 of the right leg is connected to M4 and M5 of the intermediate leg, and a pin R4 of the right leg is connected to M6 of the intermediate leg.
Fig. 4 shows the flow of current in the positive half cycle, fig. 5 shows the flow of current in the positive half cycle, fig. 6 shows the flow of current in the negative half cycle, and fig. 7 shows the flow of current in the negative half cycle. Q1, Q2, Q3, Q4, Q5 and Q6 are high frequency PWM control signals, and QT1 and QT2 are trigger signals for synchronously outputting voltage frequency. When the positive half cycle current is as shown in fig. 4, 301a, Q1, LS1, 302, LS2, QT1, Q5, Q6, and 301b flow sequentially. When the power transistors Q1 and Q6 are turned off, as shown in fig. 5, the positive half-cycle freewheeling paths flow through Q3, LS1, 302, LS2 and QT1 sequentially, and the positive half-cycle freewheeling loop is improved compared with full-bridge inversion. When the negative half-cycle current flows through 301a, Q5, LS2, 302, LS1, QT2, Q2, and 301b sequentially as shown in fig. 6. When the power transistors Q5 and Q2 are turned off, as shown in fig. 7, the negative half-cycle freewheeling paths flow through Q4, LS2, 302, LS1, and QT2 sequentially, and the negative half-cycle freewheeling loops are improved compared to full-bridge inversion.
Example 4:
In the boosting regulation method of the boosting three-bridge arm inverter, the power supply equipment is connected with the high-frequency switch boosting circuit, then connected with the three-bridge arm inverter bridge through the rectification filter circuit and finally connected with a power grid or a load;
the storage battery push-pull boost circuit outputs alternating current through the three-bridge arm inverter bridge finally through the rectification filter circuit, the DSP sampling pin is connected to the power sampling part, the DSP outputs PWM driving waveforms to the isolation driving circuit respectively, and the push-pull boost circuit and the power tube of the three-bridge arm inverter bridge are controlled through isolation and power amplification of the isolation driving circuit;
The front feedback end of the main control DSP acquires output signals after rectifying and filtering of the step-up transformer, the rear feedback end acquires voltage and current signals and grid-connected voltage signals output by the inverter, a driving waveform is generated through feedback, the driving waveform controls the left bridge arm, the middle bridge arm and the right bridge arm of the three-bridge arm inverter in real time, the communication end of the main control DSP is connected with the communication end of the FPGA through 16bit data lines, and the FPGA is connected with the server and the display interface through 4G wireless transmission.
Example 5:
According to the boost regulation method of the boost three-bridge arm inverter of embodiment 4, the isolation driving module includes a control IC part, the IC part is connected to an input end of the power conversion part, an output end of the power conversion part is connected to an input end of the waveform rectification, an output end of the waveform rectification is connected to an input end of the voltage feedback, an output end of the voltage feedback is connected to a feedback pin of the control IC, the output end of the waveform rectification is simultaneously connected to a bipolar voltage receiving end of the signal conversion, an input driving pin of the signal conversion is connected to a DSP driving signal, an output pin of the signal conversion is connected to the power switching tube, and the driving signal of the DSP converts the unipolar power supply into a bipolar voltage driving output through the isolation driving module.
FIG. 9 is a flowchart of the operation of the method, including:
Step 501, checking whether the voltage of the power supply equipment is normal or not through the DSP by normal connection of the power supply equipment, and supplying power to the primary side of the system through the power supply equipment.
Step 502, when the voltage of the power supply equipment is normal, the push-pull boost circuit is driven by the DSP to convert the low-voltage direct current into high-voltage high-frequency alternating current.
Step 503, rectifying and filtering the high-voltage high-frequency alternating current to enable the DSP to check the high-voltage direct current signal to determine the voltage range of the direct current high voltage.
And 504, selecting the grid connection or off-line operation of the system by using the interaction of the controller and the upper computer, determining the magnitude of the output current when the grid connection is selected, and determining the magnitude of the output voltage when the grid connection is independently operated.
Step 505, generating PWM waves to drive power tubes of the three-bridge arm inverter through calculation of the DSP, and converting high-voltage direct current into needed alternating current through the LCL filter circuit.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910070874.7A CN109687749B (en) | 2019-01-25 | 2019-01-25 | Boost three-leg inverter and boost regulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910070874.7A CN109687749B (en) | 2019-01-25 | 2019-01-25 | Boost three-leg inverter and boost regulation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109687749A CN109687749A (en) | 2019-04-26 |
| CN109687749B true CN109687749B (en) | 2025-02-14 |
Family
ID=66194682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910070874.7A Active CN109687749B (en) | 2019-01-25 | 2019-01-25 | Boost three-leg inverter and boost regulation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109687749B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208583B (en) * | 2019-05-06 | 2022-02-18 | 福建星云电子股份有限公司 | Ripple current generating device based on battery core charging and discharging |
| CN115549495A (en) * | 2022-10-24 | 2022-12-30 | 品艺(深圳)技术控股有限公司 | Outdoor Power Box |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209267468U (en) * | 2019-01-25 | 2019-08-16 | 哈尔滨理工大学 | Step-up three-leg inverter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100322763B1 (en) * | 1999-11-11 | 2002-02-07 | 장명언 | charger contained inverting function |
| CN203788183U (en) * | 2014-01-03 | 2014-08-20 | 上海理工大学 | A car inverter |
| CN203722503U (en) * | 2014-01-20 | 2014-07-16 | 广东美的制冷设备有限公司 | Grid-connected inverter |
| CN203788156U (en) * | 2014-04-08 | 2014-08-20 | 上海理工大学 | Car inverter |
| CN207117486U (en) * | 2017-07-20 | 2018-03-16 | 西安科技大学 | Multiple-channel output random waveform current source system |
-
2019
- 2019-01-25 CN CN201910070874.7A patent/CN109687749B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209267468U (en) * | 2019-01-25 | 2019-08-16 | 哈尔滨理工大学 | Step-up three-leg inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109687749A (en) | 2019-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110365205B (en) | High-efficiency totem-pole bridgeless PFC rectifier control method | |
| CN201856022U (en) | Soft switching IGBT double-inverter type square wave AC-DC (Alternating Current-Direct Current) tungsten-inert-gas welding power source | |
| CN102299649B (en) | Supply convertor | |
| WO2022073319A1 (en) | Inverter circuit for realizing single-phase power efficient control of single-phase three-wire power source | |
| CN109687749B (en) | Boost three-leg inverter and boost regulation method | |
| CN111555605B (en) | Control method for reducing critical mode three-level converter switching frequency range | |
| CN107124105B (en) | Improve the control system and method for isolated form three-level PFC converter PF | |
| CN202918023U (en) | Battery management power module | |
| CN102291020A (en) | Alternating-current push-pull conversion-single-diode rectification AC-DC (alternating current-to-direct current) converter | |
| CN113489363B (en) | Bidirectional H6 photovoltaic grid-connected converter and modulation method thereof | |
| CN111342684B (en) | A single-phase three-level Buck PFC rectifier and its control method | |
| CN207460024U (en) | A kind of four switch AC side power decoupling circuits | |
| CN202759643U (en) | LED television and backlight driving circuit thereof | |
| CN209267468U (en) | Step-up three-leg inverter | |
| CN102097946A (en) | A multifunctional rectification and inverter power feedback load | |
| CN115441695B (en) | Inverter modulation method for improving power density of low-voltage input and high-voltage output | |
| CN108683345B (en) | Three-phase improved double-Buck/Boost converter based on SiC diode | |
| CN203562977U (en) | Photovoltaic inverter power supply with Buck-Boost topology | |
| CN202334349U (en) | Direct current isolated grid-connected inversion circuit and photovoltaic inversion system | |
| CN116961400A (en) | High-efficiency bridgeless buck PFC converter without input diode | |
| CN206099812U (en) | A single-phase sine wave variable frequency power supply system | |
| CN104218809A (en) | A circuit device integrating power factor correction and DC-DC conversion | |
| CN110729913B (en) | A single-stage high-gain five-switch boost inverter | |
| CN107947615A (en) | Mixed type gird-connected inverter | |
| Cai et al. | Highly reliable dual-ground lift-voltage PV grid-connected inverter |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20241216 Address after: 100041 Beijing Shijingshan Gaojing Power Plant (1-3) Applicant after: Datang International Power Generation Co.,Ltd. Beijing Gaojing Thermal Power Branch Country or region after: China Address before: 150080 No. 52, Xuefu Road, Nangang District, Heilongjiang, Harbin Applicant before: HARBIN University OF SCIENCE AND TECHNOLOGY Country or region before: China |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |