CN208174570U - A kind of harmonics restraint active inverter - Google Patents
A kind of harmonics restraint active inverter Download PDFInfo
- Publication number
- CN208174570U CN208174570U CN201820475690.XU CN201820475690U CN208174570U CN 208174570 U CN208174570 U CN 208174570U CN 201820475690 U CN201820475690 U CN 201820475690U CN 208174570 U CN208174570 U CN 208174570U
- Authority
- CN
- China
- Prior art keywords
- current
- inverter
- circuit
- phase
- output
- 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
- 230000005669 field effect Effects 0.000 claims abstract description 10
- 230000009466 transformation Effects 0.000 claims abstract description 5
- 238000013519 translation Methods 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000013432 robust analysis Methods 0.000 description 1
Landscapes
- Inverter Devices (AREA)
Abstract
Originally practical to be related to a kind of harmonics restraint active inverter, belong to power electronics field.The rear termination of the three-phase inverter of harmonics restraint active inverter is loaded by the resistance sense that inductor and resistor form, and current sampling circuit samples the three-phase current of output；Then the current signal sampled carries out 3S/2R transformation by 3S/2R translation circuit, will be delivered to H ∞ controller by the current signal of 3S/2R transformation；The electric current of H ∞ controller output is by being output to SVPWM modulation circuit after 2R/2S translation circuit；SVPWM modulation circuit exports the switching tube in space vector impulse wave control three-phase inverter；Three-phase inverter input terminal is connected directly with DC power supply；The inverter circuit that three-phase inverter is made of the MOSFET field-effect tube of microcontroller DSPTM320F2812 and model CSD18532KCS；It is 220v alternating current that the DC power supply that direct current inputs is reverse into phase voltage by three-phase inverter.Harmonics restraint active inverter provided by the utility model can be effectively reduced the humorous content in output current phase, save the energy.
Description
Technical field
Originally practical to be related to a kind of harmonics restraint active inverter, belong to power electronics field.
Background technique
Today's society fossil energy is increasingly depleted, improves utilization rate of electrical and is of great significance for solving energy problem.
Modern power electronics technology has great significance for reducing electrical source consumption and improving efficiency.Inverter is that one kind can incite somebody to action
The device of converting direct-current power into alternating-current power.
Conventional inverter output electric current is unstable, harmonic content is big, this will affect the working condition of high-precision electrical equipment,
The efficiency that calorific value simultaneously will lead to greatly whole system reduces.Mains by harmonics content is higher simultaneously to transport the safety and stability of power grid
Row causes certain threat, can also generate interference to the communication system in power grid.The efficiency of conventional inverter only has 70%, adjusts
Circuit processed is SPWM modulation circuit mostly, there is a problem of that output current ripple coefficient is big.It is continuous with demand of industrial production
It improves, increasingly higher demands is proposed to the reliability, stability and efficiency of inverter.Harmonics restraint active inverter by
It in using SVPWM modulation technique, is optimized using H ∞ controller, stability is high, highly reliable, and high-efficient, harmonic wave contains
It measures few advantage gradually to display, and has a wide range of applications.
With the rapid development of market economy, people are not solely restricted to the ground being visually observed to the expectation of product
Side, but it is more deep to small, accurate, limitization development.Representative technology one of of the ultraprecise position control as mainstream,
Demand increasingly increases in the market, it is a comprehensive very strong subject, mainly includes automatic control, image procossing, essence
Close measurement etc..
Utility model content
The utility model provides a kind of harmonics restraint active inverter in view of the above deficiencies.
The utility model adopts the following technical solution：
Harmonics restraint active inverter described in the utility model, including three-phase inverter, SVPWM modulation circuit, electric current
Sample circuit, H ∞ controller；The rear termination of three-phase inverter is loaded by the resistance sense that inductor and resistor form, current sample
Circuit samples the three-phase current of output；Then the current signal sampled carries out 3S/2R change by 3S/2R translation circuit
It changes, H ∞ controller will be delivered to by the current signal of 3S/2R transformation；The electric current of H ∞ controller output is converted by 2R/2S
SVPWM modulation circuit is output to after circuit；SVPWM modulation circuit exports in space vector impulse wave control three-phase inverter
Switching tube；Three-phase inverter input terminal is connected directly with DC power supply；Three-phase inverter is by microcontroller DSPTM320F2812
And the inverter circuit of the MOSFET field-effect tube composition of model CSD18532KCS；The direct current that three-phase inverter inputs direct current
Power inverter is 220v alternating current at phase voltage.
Harmonics restraint active inverter described in the utility model, the three-phase inverter use MOSFET field-effect tube
Constitute the switching device of inverter, microcontroller output SVPWM pulse opening or closing for control switch pipe.
Harmonics restraint active inverter described in the utility model, the switching tube model which uses
CSD18532KCS, microcontroller use the DSPTM320F2812 of Texas Instrument.
Harmonics restraint active inverter described in the utility model, the current collection circuit, which will export electric current, to be passed through
D axis component and q axis component are decomposed into after 3S/2R transformation；The H ∞ controller is by d axis component, q axis component and given reference
Difference between current component carries out feedback control, and output electric current is made to reach given reference current value.
Harmonics restraint active inverter described in the utility model, the signal acquisition circuit use magnetic pole Hall current
Sensor MLX91205.
Beneficial effect
Harmonics restraint active inverter provided by the utility model can be effectively reduced the humorous content in output current phase,
The harmonic wave of conventional inverter output current phase is about 7.8%, and the output current phase harmonic content of the active inverter is about 2.3%,
Effectively reduce harmonic content；The power utilization rate of the active inverter has reached 90% simultaneously, than the electricity of traditional inverter
Source utilization rate improves 15%, has saved the energy.To sum up, which reduces the harmonic content of output current phase output,
Improve power utilization rate.
Detailed description of the invention
Fig. 1 is the structural block diagram of the harmonics restraint inverter of the utility model；
Fig. 2 is the functional block diagram of the generation svpwm pulse of the utility model；
Fig. 3 is the main circuit schematic diagram of the active inverter of the utility model；
Fig. 4 is the current detecting and conversion circuit figure of the utility model；
Fig. 5 is the basic control flow figure of the H ∞ controller of the utility model.
Specific embodiment
To keep the purpose and technical solution of the utility model embodiment clearer, implement below in conjunction with the utility model
The attached drawing of example, is clearly and completely described the technical solution of the utility model embodiment.Obviously, described embodiment
It is a part of the embodiment of the utility model, instead of all the embodiments.Based on described the embodiments of the present invention,
Those of ordinary skill in the art's every other embodiment obtained under the premise of being not necessarily to creative work belongs to practical
Novel protected range：
The harmonics restraint inverter system block diagram of the utility model is as shown in Figure 1, include svpwm modulation circuit, three contraries
Become device main circuit, current sample detection circuit, H ∞ controller, isolation circuit.It is main that svpwm modulation circuit generates svpwm pulse
It is to be realized using F2812 internal hardware function.
Field effect transistor switch pipe is driven using IR2130, and IR2130 chip can export six tunnel pulses to drive three bridges
The power tube of arm, and only needing to provide a power supply and simple peripheral circuit can be so that power tube works normally.
Field-effect tube CSD18532KCS is a switch mosfet pipe that Texas Instruments release, the low, function with thermal resistance
Consume low feature.Conducting resistance only has 3.3m Ω, can be improved the efficiency of inversion.Field-effect tube CSD18532KCS is as switch
Device constitutes active-inverter, and DSPTM320F2812 exports svpwm pulse, and control switch pipe being opened and turning off, and realizes inverse
Become function.
For circuit system using microcontroller DSPTM320F2812 as core devices, which is that Texas Instruments newly push away
32 fixed-point dsps of the C28x kernel compatible based on code out, the instruction execution cycle of C28x kernel reach
6.67ns, maximum running frequency can achieve 150MHz, ensure that control system has enough operational capabilities.The chip interior
There is a SARAM of 18K, including MO, M1, L0, L1, H0 totally 5 memory blocks.Each memory block keeps independent, can be in uniform machinery week
Phase accesses to different RAM blocks, can reduce assembly line time delay.And there are the FLASH of 128K word, address inside F2812
Space 3D8000h~3F7FFFh is suitable for low-power consumption, high performance control system.Furthermore F2812 provides external memory
Expansion interface (XINTF), facilitates carry out system extension, and addressing space can achieve 1MB.This patent uses
DSPTM320F2812 is primarily due to chip arithmetic speed height as core devices, and low energy consumption.
As shown in Figure 2：The utility model is using svpwm pulsed drive switch mosfet pipe, the use of svpwm pulse
The harmonic content for advantageously reducing output phase voltage achievees the purpose that inhibit harmonic wave.N1 is used to judge locating for reference voltage vector
Sector position；XYZ module is for calculating the time that may be acted in different sectors, neighboring voltage vector；Subsystem module
For calculating when voltage vector is in n-th sector, the specific time of neighboring voltage vector effect；Subsystem1 module is used
In the time for calculating each voltage vector switching point；When produce pwm module passes through obtained neighboring voltage vector effect
Between and time of switching point the waveform of SVPWM is calculated.
Svpwm pulse generation module has the following advantages that：Harmonic wave of output voltage content can be reduced to 3.07%, stablized
The virtual value of phase voltage is 220V.
As shown in Figure 3：Three-phase full-bridge inverting circuit, the partial circuit are mainly made of six MOSFET field-effect tube,
The control that pulse signal is connected and is turned off to six MOSFET field-effect tube is generated by DSP.When DSP issues positive pulse
When, corresponding switching tube conducting；When DSP issues negative pulse, corresponding switching tube shutdown.Finally the DC quantity of input is converted
For of ac, the function of inversion is realized.
When inverter works, output electric current is obtained by current monitoring chip measurement and is fed back to H ∞ controller, when
When difference between output electric current and reference current is very big, H ∞ controller can export different control according to the size of error amount
Signal achievees the purpose that reduce harmonic content for improving the output pulse of svpwm modulation circuit.
As shown in Figure 4：Current sample and isolation protective circuit, in the shadow of input voltage, device parameters and temperature change
Under sound, output electric current can be fluctuated.MLX91205 is the high precision electric current transducer of Belgium Co., Ltd MELEXIS production, is adopted
Magnetic pole Hall current sensor MLX91205 is used to measure the output electric current of inverter as the monitoring chip of output electric current.Simultaneously
Control circuit and power circuit are isolated using linear optical coupling HCNR201, play the purpose of protection control circuit.
The phase current conducting bar for exporting electric current is placed in 1cm right above chip, electric current is out-of-date when having, the A-Out pin of chip
Corresponding voltage signal will be generated, the relationship between output voltage and output electric current is：
Uout=2.48+0.004I
It can amplify by transistor amplifier after the voltage signal Uout of generation and be input to opto-coupler chip
1 pin of HCNR201 exports after handling by opto-coupler chip internal circuit from 5,6 pins.Hall sensor is to output electric current
After being sampled, it is also necessary to which the A/D conversion module inside dsp chip carries out digital-to-analogue conversion.The passband of opto-coupler chip HCNR201
Band up to 1MHz is suitable for this system.Linear optical coupling can not only play the role of insulation blocking, but also have the work of feedback
With.The output voltage of the opto-coupler chip can be good at tracking the variation of input voltage, have very high precision.
As shown in Figure 5：The H ∞ controlling stream graph of standard, the foundation of H ∞ controller mainly include the following steps that：
（1）The state equation of system is established, and by simply converting, the analysis by Linearization mould being balanced near a little
Type；
（2）Input matrix w is determined according to the characteristics of this system；
（3) according to system itself the characteristics of, the weight matrix in state equation is determined；
（4）H ∞ controller is calculated by Robust Analysis common method LMI.The H ∞ controller that the utility model uses has
It being interfered conducive in circuit, there are when large error, output control signal carries out feedback control for output voltage and reference voltage,
Reduce influence of the interference signal to inverter circuit.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should
It is subject to the protection scope in claims.
Claims (4)
1. a kind of harmonics restraint active inverter, it is characterised in that：Including three-phase inverter, SVPWM modulation circuit, current sample
Circuit, H ∞ controller；The rear termination of three-phase inverter is loaded by the resistance sense that inductor and resistor form, current sampling circuit
The three-phase current of output is sampled；Then the current signal sampled carries out 3S/2R transformation by 3S/2R translation circuit, will
H ∞ controller is delivered to by the current signal that 3S/2R is converted；H ∞ controller output electric current by 2R/2S translation circuit it
After be output to SVPWM modulation circuit；SVPWM modulation circuit exports the switch in space vector impulse wave control three-phase inverter
Pipe；Three-phase inverter input terminal is connected directly with DC power supply；Three-phase inverter is by microcontroller and MOSFET field-effect tube
The inverter circuit of composition；It is 220v alternating current that the DC power supply that direct current inputs is reverse into phase voltage by three-phase inverter.
2. harmonics restraint active inverter according to claim 1, it is characterised in that：The three-phase inverter uses
MOSFET field-effect tube constitutes the switching device of inverter, and microcontroller exports the unlatching that SVPWM pulse is used for control switch pipe
Or it closes.
3. harmonics restraint active inverter according to claim 1, it is characterised in that：The current collection circuit will be defeated
Electric current is decomposed into d axis component and q axis component after 3S/2R is converted out；The H ∞ controller by d axis component, q axis component with
Difference between given reference current component carries out feedback control, and output electric current is made to reach given reference current value.
4. harmonics restraint active inverter according to claim 1, it is characterised in that：The signal acquisition circuit uses
Magnetic pole Hall current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820475690.XU CN208174570U (en) | 2018-04-04 | 2018-04-04 | A kind of harmonics restraint active inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820475690.XU CN208174570U (en) | 2018-04-04 | 2018-04-04 | A kind of harmonics restraint active inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208174570U true CN208174570U (en) | 2018-11-30 |
Family
ID=64373413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820475690.XU Active CN208174570U (en) | 2018-04-04 | 2018-04-04 | A kind of harmonics restraint active inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208174570U (en) |
-
2018
- 2018-04-04 CN CN201820475690.XU patent/CN208174570U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101499666A (en) | Photovoltaic grid connection power generation system based on DC converter and working method thereof | |
| CN101083399A (en) | Z source power transformation based photovoltaic network inverter | |
| CN101055991A (en) | 380V system active power filtering device | |
| CN104852566A (en) | H-bridge cascade type STATCOM control system based on model prediction | |
| CN202353492U (en) | Boosting type inverter driving and controlling circuit based on ARM | |
| CN107086600A (en) | A kind of solar energy power generating three phase full bridge grid-connected inverting system | |
| CN102156267A (en) | Experimental device for high-power photovoltaic grid-connected inverter | |
| CN102496933B (en) | Double parallel active power filtering apparatus | |
| CN103337860A (en) | Predictive control system and predictive control method used for APF (active power filter) | |
| CN202121331U (en) | Intelligent multifunctional photovoltaic grid-connected inverter | |
| CN2907030Y (en) | Low-harmonic variable-frequency speed regulator with reactive power compensation function | |
| CN101777776A (en) | Method for controlling intelligent PV grid-connected inverter based on synchro generator model | |
| CN103023046B (en) | Based on the operating passing zero filtering reactive power compensator that dsp chip controls | |
| CN204886736U (en) | Novel intelligence invertion power supply device | |
| CN106208066A (en) | A kind of Active Power Filter-APF compensates anti-interference tracking control system and the control method thereof of electric current | |
| CN208174570U (en) | A kind of harmonics restraint active inverter | |
| CN201601610U (en) | Inverter circuit | |
| CN101963787B (en) | Dual feedback loop control method of power active filter | |
| CN205809203U (en) | A kind of converter special test system | |
| CN201601654U (en) | Energy saving device of active power filter digital processing control motor | |
| CN108390404B (en) | Converter control method based on energy storage of vanadium cell | |
| CN103257667A (en) | Maximum power point tracking technology of photovoltaic system | |
| CN105958525A (en) | PWM gird connected inverter control method of permanent magnetism wind generator system | |
| CN203056589U (en) | Zero-crossing switching filtering reactive compensation device based on digital signal processor (DSP) chip control | |
| CN205160469U (en) | A monitor cell for photovoltaic power generation system monitoring devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |