CN210405119U - Inverter based on SPWM intelligent regulation - Google Patents
Inverter based on SPWM intelligent regulation Download PDFInfo
- Publication number
- CN210405119U CN210405119U CN201920935953.5U CN201920935953U CN210405119U CN 210405119 U CN210405119 U CN 210405119U CN 201920935953 U CN201920935953 U CN 201920935953U CN 210405119 U CN210405119 U CN 210405119U
- Authority
- CN
- China
- Prior art keywords
- unit
- signal
- spwm
- output
- alternating current
- 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
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model provides an inverter based on SPWM intelligent regulation, the inverter includes direct current input unit, control wave generation unit, drive unit, contravariant unit, first filter unit, interchange output unit, signal acquisition unit, second filter unit, AD converting unit, control processing unit, button input unit, display element and memory cell; the inverter intelligently generates control waves to further generate SPWM pulse signals, the SPWM pulse signals are input to the driving unit to drive the inversion unit to invert direct current to output alternating current, and intelligent inversion work of the inverter is achieved. The utility model discloses the alternating current of gathering output is as feedback signal, intelligent control the dc-to-ac converter generates drive signal, and then outputs the alternating current that meets the requirements.
Description
Technical Field
The utility model belongs to the technical field of power equipment, in particular to dc-to-ac converter based on SPWM intelligent regulation.
Background
The power system mainly adopts alternating current for power supply, and people adopt storage batteries and the like for direct current power supply in order to prevent work of some important equipment caused by sudden power failure. The direct current power supply needs to carry out inversion processing for supplying power to alternating current equipment, and along with the continuous development of science and technology, the application of the SPWM inverter is more and more, and the SPWM inverter becomes an indispensable part in the life and the production of people.
The traditional way of completing inversion by the inverter is realized by a square wave inverter circuit consisting of thyristors, square wave alternating current is output, the positive maximum value and the negative maximum value of the waveform of the square wave alternating current are almost simultaneously generated, and the square wave inverter circuit contains a plurality of components and low-order harmonic waves. The utility model discloses asynchronous machine driven dc-to-ac converter, the alternating current of gathering output is as feedback signal, intelligent control the dc-to-ac converter generates drive signal, and then outputs the alternating current that meets the requirements.
SUMMERY OF THE UTILITY MODEL
The utility model provides an inverter based on SPWM intelligent regulation gathers the alternating current of output as feedback signal, intelligent control the inverter generates drive signal, and then outputs the alternating current that meets the requirements.
The utility model relates to an intelligent regulation inverter based on SPWM, which comprises a DC input unit, a control wave generation unit, a drive unit, an inversion unit, a first filter unit, an AC output unit, a signal acquisition unit, a second filter unit, an A/D conversion unit, a control processing unit, a key input unit, a display unit and a storage unit, the direct current input unit is sequentially and annularly connected with the inverter unit, the first filtering unit, the alternating current output unit, the signal acquisition unit, the second filtering unit, the A/D conversion unit, the control processing unit, the control wave generation unit and the driving unit, the control processing unit is also respectively connected with the signal acquisition unit, the key input unit, the display unit and the storage unit; the inverter intelligently generates control waves to further generate SPWM pulse signals, the SPWM pulse signals are input to the driving unit to drive the inversion unit to invert direct current to output alternating current, and intelligent inversion work of the inverter is achieved.
The signal acquisition unit adopts a voltage sensor, acquires an output voltage signal of the alternating current output unit according to a control instruction of the control processing unit, the output voltage signal passes through the second filtering unit to filter interference signals, and the output voltage signal is input into the control processing unit as a feedback signal after being subjected to A/D conversion by the A/D conversion unit.
The key input unit is combined with the display unit and the storage unit to carry out parameter setting and information inquiry, and the parameters comprise the reference voltage.
The control processing unit adopts a microprocessor, compares and calculates the voltage signal with the reference voltage to obtain a difference voltage, further controls the control wave generating unit to generate the SPWM pulse signal, and finally realizes the control of the amplitude of the output voltage of the alternating current output unit.
The control wave generation unit comprises a triangular wave generation module, a sine wave generation module and an SPWM wave generation module, and the triangular wave generation module and the sine wave generation module are respectively connected with the control processing unit and the SPWM wave generation module; the triangular wave generation module adopts a reversible counter and obtains a digital triangular wave signal through cyclic addition and subtraction counting; the sine wave generating module directly synthesizes the required sine wave signals from the angle of the phase by adopting a direct digital frequency synthesis technology; the SPWM wave generation module compares the input triangular wave signal with the sine wave signal: if the triangular wave signal is larger than the sine wave signal, a turn-off low-voltage signal is output, and if the triangular wave signal is smaller than the sine wave signal, a turn-on high-voltage signal is output.
The driving unit adopts an IGBT special integrated driving chip to drive the power device IGBT, and can simultaneously control the on and off of 6 power device IGBTs.
The inversion unit adopts a three-phase bridge type inversion circuit, outputs alternating current by inverting the direct current of the direct current input unit in combination with a driving signal output by the driving unit, performs filtering processing on the alternating current through the first filtering unit, and finally supplies power to the outside through the alternating current output unit.
Drawings
Fig. 1 is the utility model relates to a structural schematic of dc-to-ac converter based on SPWM intelligent regulation.
Detailed Description
The following is a detailed explanation of a specific embodiment of the inverter based on SPWM intelligent regulation according to the present invention with reference to the accompanying drawings.
As shown in fig. 1, the inverter of the present invention includes a dc input unit, a control wave generating unit, a driving unit, an inverting unit, a first filtering unit, an ac output unit, a signal collecting unit, a second filtering unit, an a/D converting unit, a control processing unit, a key input unit, a display unit and a storage unit, wherein the dc input unit is annularly connected to the inverting unit, the first filtering unit, the ac output unit, the signal collecting unit, the second filtering unit, the a/D converting unit, the control processing unit, the control wave generating unit and the driving unit in sequence, and the control processing unit is further connected to the signal collecting unit, the key input unit, the display unit and the storage unit respectively; the inverter intelligently generates control waves to further generate SPWM pulse signals, the SPWM pulse signals are input to the driving unit to drive the inversion unit to invert direct current to output alternating current, and intelligent inversion work of the inverter is achieved.
The signal acquisition unit adopts a voltage sensor, acquires an output voltage signal of the alternating current output unit according to a control instruction of the control processing unit, the output voltage signal passes through the second filtering unit to filter interference signals, and the output voltage signal is input into the control processing unit as a feedback signal after being subjected to A/D conversion by the A/D conversion unit.
The key input unit is combined with the display unit and the storage unit to carry out parameter setting and information inquiry, and the parameters comprise the reference voltage.
The control processing unit adopts a microprocessor, compares and calculates the voltage signal with the reference voltage to obtain a difference voltage, further controls the control wave generating unit to generate the SPWM pulse signal, and finally realizes the control of the amplitude of the output voltage of the alternating current output unit.
The control wave generation unit comprises a triangular wave generation module, a sine wave generation module and an SPWM wave generation module, and the triangular wave generation module and the sine wave generation module are respectively connected with the control processing unit and the SPWM wave generation module; the triangular wave generation module adopts a reversible counter and obtains a digital triangular wave signal through cyclic addition and subtraction counting; the sine wave generating module directly synthesizes the required sine wave signals from the angle of the phase by adopting a direct digital frequency synthesis technology; the SPWM wave generation module compares the input triangular wave signal with the sine wave signal: if the triangular wave signal is larger than the sine wave signal, a turn-off low-voltage signal is output, and if the triangular wave signal is smaller than the sine wave signal, a turn-on high-voltage signal is output.
The driving unit adopts an IGBT special integrated driving chip to drive the power device IGBT, and can simultaneously control the on and off of 6 power device IGBTs.
The inversion unit adopts a three-phase bridge type inversion circuit, outputs alternating current by inverting the direct current of the direct current input unit in combination with a driving signal output by the driving unit, performs filtering processing on the alternating current through the first filtering unit, and finally supplies power to the outside through the alternating current output unit.
The working process of the inverter is as follows:
step (1): the control processing unit controls the voltage sensor to collect an output voltage signal of the alternating current output unit;
step (2): filtering processing is carried out through the second filtering unit;
and (3): performing A/D conversion by the A/D conversion unit;
and (4): the control processing unit compares the voltage signal with the reference voltage, calculates a difference voltage and determines the sine wave modulation degree;
and (5): the triangular wave generation module reversible counter counts an input clock, performs addition operation firstly, increases the input clock from 0 to the triangular wave peak value Uc, performs subtraction operation again, and decreases the input clock from the triangular wave peak value Uc to 0, so as to circularly form a triangular waveform;
and (6): the sine wave generating module generates an output sine wave according to the sine wave modulation degree;
and (7): comparing the triangular wave signal with the sine wave signal: if the triangular wave signal is larger than the sine wave signal, outputting a turn-off low voltage signal, and if the triangular wave signal is smaller than the sine wave signal, outputting a turn-on high voltage signal to realize the output of the SPWM pulse signal;
and (8): the SPWM pulse signal is output to the driving unit;
and (9): the inversion unit inverts the direct current input by the direct current input unit to output alternating current;
step (10): filtering processing is carried out through the first filtering unit;
step (11): and outputting the alternating current outwards through the alternating current output unit.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. An intelligent SPWM-based inverter is characterized by comprising a direct current input unit, a control wave generation unit, a driving unit, an inversion unit, a first filtering unit, an alternating current output unit, a signal acquisition unit, a second filtering unit, an A/D conversion unit, a control processing unit, a key input unit, a display unit and a storage unit, the direct current input unit is sequentially and annularly connected with the inverter unit, the first filtering unit, the alternating current output unit, the signal acquisition unit, the second filtering unit, the A/D conversion unit, the control processing unit, the control wave generation unit and the driving unit, the control processing unit is also respectively connected with the signal acquisition unit, the key input unit, the display unit and the storage unit; the inverter intelligently generates control waves to further generate SPWM pulse signals, and the SPWM pulse signals are input to the driving unit to drive the inversion unit to invert direct current to output alternating current, so that the intelligent inversion work of the inverter is realized; the signal acquisition unit adopts a voltage sensor, acquires an output voltage signal of the alternating current output unit according to a control instruction of the control processing unit, and the output voltage signal is subjected to interference signal filtering by the second filtering unit and is input into the control processing unit as a feedback signal after being subjected to A/D conversion by the A/D conversion unit; the driving unit adopts an IGBT special integrated driving chip to drive the power device IGBT, and can simultaneously control the on and off of 6 power device IGBTs; the inversion unit adopts a three-phase bridge type inversion circuit, outputs alternating current by inverting the direct current of the direct current input unit in combination with a driving signal output by the driving unit, performs filtering processing on the alternating current through the first filtering unit, and finally supplies power to the outside through the alternating current output unit.
2. The SPWM smart regulation-based inverter of claim 1, wherein the key input unit is coupled to the display unit and the storage unit for parameter setting and information query, and the parameter comprises the reference voltage.
3. The SPWM intelligent regulation-based inverter of claim 2, wherein the control processing unit adopts a microprocessor, compares the voltage signal with the reference voltage to obtain a difference voltage, controls the control wave generating unit to generate the SPWM pulse signal, and finally realizes control of the amplitude of the output voltage of the alternating current output unit.
4. The SPWM intelligent regulation-based inverter according to claim 3, wherein the control wave generation unit comprises a triangular wave generation module, a sinusoidal wave generation module and an SPWM wave generation module, and the triangular wave generation module and the sinusoidal wave generation module are respectively connected with the control processing unit and the SPWM wave generation module; the triangular wave generation module adopts a reversible counter and obtains a digital triangular wave signal through cyclic addition and subtraction counting; the sine wave generating module directly synthesizes the required sine wave signals from the angle of the phase by adopting a direct digital frequency synthesis technology; the SPWM wave generation module compares the input triangular wave signal with the sine wave signal: if the triangular wave signal is larger than the sine wave signal, a turn-off low-voltage signal is output, and if the triangular wave signal is smaller than the sine wave signal, a turn-on high-voltage signal is output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920935953.5U CN210405119U (en) | 2019-06-20 | 2019-06-20 | Inverter based on SPWM intelligent regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920935953.5U CN210405119U (en) | 2019-06-20 | 2019-06-20 | Inverter based on SPWM intelligent regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210405119U true CN210405119U (en) | 2020-04-24 |
Family
ID=70351825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920935953.5U Active CN210405119U (en) | 2019-06-20 | 2019-06-20 | Inverter based on SPWM intelligent regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210405119U (en) |
-
2019
- 2019-06-20 CN CN201920935953.5U patent/CN210405119U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101667789B (en) | Inverter circuit used for solar energy photovoltaic grid connection and device thereof | |
| CN103283135A (en) | Electric power converter | |
| CN201430540Y (en) | Z-source inverter controlling system with FPGA based on DSP | |
| CN202931222U (en) | Inverter power supply control device | |
| CN102856928B (en) | A kind of inverter | |
| CN101873077A (en) | Multilevel current inverter circuit with single drive power supply as well as control device and method thereof | |
| CN2907030Y (en) | Low-harmonic variable-frequency speed regulator with reactive power compensation function | |
| CN108141147A (en) | The five-electrical level inverter topological circuit of high voltage gain | |
| CN103560654A (en) | Driving method of full bridge inverter and full bridge inverter | |
| CN210405119U (en) | Inverter based on SPWM intelligent regulation | |
| CN105006980A (en) | Three-level NPC current transformer PWM control strategy based on carrier wave overlapping | |
| CN201937496U (en) | High-frequency inverter control system based on single-phase space vector pulse width modulation (SVPWM) | |
| CN209046549U (en) | A kind of inverter based on Induction Motor-Driven | |
| Huynh et al. | FPGA-based PWM implementation of matrix converter in inductive wireless power transfer systems | |
| CN216851764U (en) | Energy storage type variable frequency transmission device | |
| CN205509865U (en) | Sinusoidal wave variable frequency power supply | |
| JP3823833B2 (en) | Power converter | |
| CN203722503U (en) | Grid-connected inverter | |
| Razi et al. | A novel single-stage PWM microinverter topology using two-power switches | |
| CN104935153A (en) | Three-phase bridge type inverter driving waveform generator | |
| CN109149989A (en) | A kind of inverter based on Induction Motor-Driven | |
| Nanda et al. | A proposed asymmetrical configuration of cascaded multilevel inverter topology for high level generation | |
| CN101018022A (en) | Highly efficient energy-saving reversion circuit | |
| CN215120632U (en) | Intelligent speed regulation integrated chip circuit of alternating current motor | |
| CN202872387U (en) | Inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |