CN109149989A - A kind of inverter based on Induction Motor-Driven - Google Patents
A kind of inverter based on Induction Motor-Driven Download PDFInfo
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- CN109149989A CN109149989A CN201811324925.6A CN201811324925A CN109149989A CN 109149989 A CN109149989 A CN 109149989A CN 201811324925 A CN201811324925 A CN 201811324925A CN 109149989 A CN109149989 A CN 109149989A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention provides a kind of inverter based on Induction Motor-Driven, the inverter includes continuous input cell, signal acquisition unit, A/D converting unit, control processing unit, key-press input unit, display unit, storage unit, alarm unit, control wave generation unit, driving unit, inversion unit, filter unit and exchanges output unit；The inverter is compared judgement with sine wave to triangular wave by the control processing unit control control wave generation unit and obtains corresponding SPWM pulse signal, the amplitude of sine wave is controlled according to the output voltage signal of asynchronous machine, and then control the amplitude of SPWM pulse signal, and input driving unit driving inversion unit and DC inverter is exported into alternating current, realize the driving to asynchronous machine.The present invention provides a kind of inverter based on Induction Motor-Driven, generates SPWM pulse signal compared with sine wave module using triangular wave module, reduces the harmonic content in output waveform, improves the output quality of inverter.
Description
Technical field
The invention belongs to electrical equipment technical field, in particular to a kind of inverter based on Induction Motor-Driven.
Background technique
A kind of mode of induction motor drive is frequency-adjustable speed-adjustable, exports wave frequency rate realization by adjusting inverter.If
Electric moter voltage is certain and only reduces frequency, then magnetic flux with regard to excessive, magnetic loop saturation will burn motor when serious.Therefore, frequency
Proportionally to change with voltage, so that the magnetic flux of motor is kept certain, avoid the generation of weak magnetic and magnetic saturation phenomenon.SPWM is inverse
The output three-phase alternating current for becoming device can be used as the input power of asynchronous motor.With the continuous development of power technology, SPWM
The application of inverter is also more and more, has become people's life, indispensable a part in production.
Inverter complete inversion traditional approach be by thyristor groups at square wave inverter circuit realize that output is
Square wave alternating-current electricity, the positive and negative maximum value of waveform almost generate simultaneously, containing compared with multicomponent low-order harmonic.And variable-frequency variable-voltage mistake
Journey is separately completed, and actual loading ability is 40%-the 60% of nominal load, and load capacity is poor and not energy band inductive load.This
The inverter of invention Induction Motor-Driven, using modular design scheme, using triangular wave module compared with sine wave module
SPWM pulse signal is generated, the harmonic content in output waveform is reduced, improves the output quality of inverter.Independent function simultaneously
Module is also beneficial to later maintenance and upgrading.
Summary of the invention
The present invention provides a kind of inverter based on Induction Motor-Driven, using triangular wave module compared with sine wave module
SPWM pulse signal is generated, reduces the harmonic content in output waveform, improves the output quality of inverter.
The present invention is specially a kind of inverter based on Induction Motor-Driven, the inverter include continuous input cell,
Signal acquisition unit, A/D converting unit, control processing unit, key-press input unit, display unit, storage unit, alarm are single
Member, control wave generation unit, driving unit, inversion unit, filter unit and exchange output unit, the continuous input cell and
The inversion unit is connected, the signal acquisition unit, the A/D converting unit, the control processing unit, the control
Wave generation unit, the driving unit, the inversion unit, the filter unit, the exchange output unit are linked in sequence, institute
State control processing unit also respectively with the key-press input unit, the display unit, the storage unit, the alarm unit
It is connected, the signal acquisition unit is also connect with the exchange output unit；The inverter is single by control processing
The member control control wave generation unit is compared judgement with sine wave to triangular wave and obtains corresponding SPWM pulse signal, root
The amplitude of the sine wave is controlled according to the output voltage signal of the asynchronous machine, and then controls the width of the SPWM pulse signal
Value, and input the driving unit and drive the inversion unit that DC inverter is exported alternating current, it realizes to the asynchronous electricity
The driving of machine.
The key-press input unit carries out parameter setting, the parameter packet in conjunction with the display unit and the storage unit
Include reference voltage alarm voltage；The alarm unit is alarmed using alarm lamp in conjunction with the display unit.
The signal acquisition unit acquires the output voltage signal of the exchange output unit using voltage sensor, passes through
The A/D converting unit is used as feedback signal to input the control processing unit, the control processing unit after carrying out A/D conversion
The voltage signal of input is compared to obtain difference voltage with preset reference voltage, and then adjusts the SPWM pulse
The waveform of signal, the final control realized to output voltage amplitude.
The control wave generation unit includes triangular wave generation module, sine wave generation module and SPWM wave generation module,
The triangular wave generation module is completed using forward-backward counter, obtains digitlization triangular wave data by recycling plus-minus counting；Institute
It states sine wave generation module and required sine wave is directly synthesized from the angle of phase using direct digital frequency synthesis technology；Institute
It states SPWM wave generation module to be connected with the triangular wave generation module, the sine wave generation module respectively, by the three of input
Angle wave is compared with sine wave: if the triangular wave is greater than the sine wave, output shutdown low-voltage, if the triangular wave is small
In the sine wave, output conducting high voltage.
The driving unit uses the dedicated integrated drive chips driving power device IGBT of IGBT of IR2130, can be simultaneously
Control the turn-on and turn-off of 6 power device IGBT.
The DC inverter of the continuous input cell is exported using three-phase inverter bridge circuit and is handed over by the inversion unit
Galvanic electricity.
The inverter course of work includes the following steps:
Step (1): the voltage sensor acquires the output voltage signal of the asynchronous machine；
Step (2): A/D conversion is carried out by the A/D converting unit；
Step (3): the voltage signal of input is compared by the control processing unit with the alarm voltage: if more than
The alarm voltage issues alarm signal by the alarm unit；If being less than the alarm voltage, (4) are entered step；
Step (4): the voltage signal of input is compared to obtain difference voltage with the reference voltage；
Step (5): the sine wave modulation degree is determined according to the difference voltage；
Step (6): the triangular wave generation module forward-backward counter counts input clock, first carries out addition fortune
It calculates, increases to the triangle crest value Uc from 0, then execute subtraction, be decremented to 0 from the triangle crest value Uc, followed with this
Ring forms triangular waveform；
Step (7): the sine wave generation module generates output sine wave according to the sine wave modulation degree；
Step (8): the triangular wave is compared with the sine wave: if the triangular wave is greater than the sine wave,
Output shutdown low voltage signal, if the triangular wave is less than the sine wave, output conducting high voltage signal realizes the SPWM
Output of pulse signal；
Step (9): the SPWM pulse signal transports to the driving unit；
Step (10): the DC inverter that the inversion unit inputs the continuous input cell exports alternating current；
Step (11): it is handled by the filtering unit filters；
Step (12): output alternating current.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the inverter based on Induction Motor-Driven of the present invention.
Fig. 2 is a kind of inverter work flow diagram based on Induction Motor-Driven of the present invention.
Specific embodiment
A kind of specific embodiment of the inverter based on Induction Motor-Driven of the present invention is done in detail with reference to the accompanying drawing
It illustrates.
As shown in Figure 1, inverter of the invention includes continuous input cell, signal acquisition unit, A/D converting unit, control
It is processing unit processed, key-press input unit, display unit, storage unit, alarm unit, control wave generation unit, driving unit, inverse
Change unit, filter unit are connected with output unit, the continuous input cell is exchanged with the inversion unit, and the signal is adopted
Collect unit, the A/D converting unit, the control processing unit, the control wave generation unit, the driving unit, described
Inversion unit, the filter unit, the exchange output unit are linked in sequence, and the control processing unit is also pressed with described respectively
Key input unit, the display unit, the storage unit, the alarm unit are connected, the signal acquisition unit also with
The exchange output unit connection；The inverter controls the control wave generation unit to three by the control processing unit
Angle wave is compared judgement with sine wave and obtains corresponding SPWM pulse signal, according to the output voltage signal of the asynchronous machine
The amplitude of the sine wave is controlled, and then controls the amplitude of the SPWM pulse signal, and inputs driving unit driving institute
It states inversion unit and DC inverter is exported into alternating current, realize the driving to the asynchronous machine.
The key-press input unit carries out parameter setting, the parameter packet in conjunction with the display unit and the storage unit
Include reference voltage alarm voltage；The alarm unit is alarmed using alarm lamp in conjunction with the display unit.
The signal acquisition unit acquires the output voltage signal of the exchange output unit using voltage sensor, passes through
The A/D converting unit is used as feedback signal to input the control processing unit, the control processing unit after carrying out A/D conversion
The voltage signal of input is compared to obtain difference voltage with preset reference voltage, and then adjusts the SPWM pulse
The waveform of signal, the final control realized to output voltage amplitude.
The control wave generation unit includes triangular wave generation module, sine wave generation module and SPWM wave generation module,
The triangular wave generation module is completed using forward-backward counter, obtains digitlization triangular wave data by recycling plus-minus counting；Institute
It states sine wave generation module and required sine wave is directly synthesized from the angle of phase using direct digital frequency synthesis technology；Institute
It states SPWM wave generation module to be connected with the triangular wave generation module, the sine wave generation module respectively, by the three of input
Angle wave is compared with sine wave: if the triangular wave is greater than the sine wave, output shutdown low-voltage, if the triangular wave is small
In the sine wave, output conducting high voltage.
The driving unit uses the dedicated integrated drive chips driving power device IGBT of IGBT of IR2130, can be simultaneously
Control the turn-on and turn-off of 6 power device IGBT.
The DC inverter of the continuous input cell is exported using three-phase inverter bridge circuit and is handed over by the inversion unit
Galvanic electricity.
As shown in Fig. 2, the inverter course of work includes the following steps:
Step (1): the voltage sensor acquires the output voltage signal of the asynchronous machine；
Step (2): A/D conversion is carried out by the A/D converting unit；
Step (3): the voltage signal of input is compared by the control processing unit with the alarm voltage: if more than
The alarm voltage issues alarm signal by the alarm unit；If being less than the alarm voltage, (4) are entered step；
Step (4): the voltage signal of input is compared to obtain difference voltage with the reference voltage；
Step (5): the sine wave modulation degree is determined according to the difference voltage；
Step (6): the triangular wave generation module forward-backward counter counts input clock, first carries out addition fortune
It calculates, increases to the triangle crest value Uc from 0, then execute subtraction, be decremented to 0 from the triangle crest value Uc, followed with this
Ring forms triangular waveform；
Step (7): the sine wave generation module generates output sine wave according to the sine wave modulation degree；
Step (8): the triangular wave is compared with the sine wave: if the triangular wave is greater than the sine wave,
Output shutdown low voltage signal, if the triangular wave is less than the sine wave, output conducting high voltage signal realizes the SPWM
Output of pulse signal；
Step (9): the SPWM pulse signal transports to the driving unit；
Step (10): the DC inverter that the inversion unit inputs the continuous input cell exports alternating current；
Step (11): it is handled by the filtering unit filters；
Step (12): output alternating current.
Finally it should be noted that only illustrating technical solution of the present invention rather than its limitations in conjunction with above-described embodiment.Institute
The those of ordinary skill in category field is it is to be understood that those skilled in the art can repair a specific embodiment of the invention
Change or equivalent replacement, but these modifications or change are being applied among pending claims.
Claims (7)
1. a kind of inverter based on Induction Motor-Driven, which is characterized in that the inverter includes continuous input cell, signal
Acquisition unit, A/D converting unit, control processing unit, key-press input unit, display unit, storage unit, alarm unit, control
Wave generation unit processed, driving unit, inversion unit, filter unit and exchange output unit, the continuous input cell with it is described
Inversion unit is connected, and the signal acquisition unit, the A/D converting unit, the control processing unit, the control wave are raw
It is linked in sequence at unit, the driving unit, the inversion unit, the filter unit, the exchange output unit, the control
Processing unit processed is also connected with the key-press input unit, the display unit, the storage unit, the alarm unit respectively
It connects, the signal acquisition unit is also connect with the exchange output unit；The inverter passes through the control processing unit control
It makes the control wave generation unit judgement is compared with sine wave to triangular wave and obtain corresponding SPWM pulse signal, according to institute
The output voltage signal for stating asynchronous machine controls the amplitude of the sine wave, and then controls the amplitude of the SPWM pulse signal,
And input the driving unit and drive the inversion unit that DC inverter is exported alternating current, it realizes to the asynchronous machine
Driving.
2. a kind of inverter based on Induction Motor-Driven according to claim 1, which is characterized in that the key-press input
Unit carries out parameter setting in conjunction with the display unit and the storage unit, and the parameter includes reference voltage alarm voltage；
The alarm unit is alarmed using alarm lamp in conjunction with the display unit.
3. a kind of inverter based on Induction Motor-Driven according to claim 2, which is characterized in that the signal acquisition
Unit acquires the output voltage signal of the exchange output unit using voltage sensor, carries out by the A/D converting unit
Input the control processing unit as feedback signal after A/D conversion, the control processing unit by the voltage signal of input and
Preset reference voltage is compared to obtain difference voltage, and then adjusts the waveform of the SPWM pulse signal, final real
Now to the control of output voltage amplitude.
4. a kind of inverter based on Induction Motor-Driven according to claim 3, which is characterized in that the control wave is raw
It include triangular wave generation module, sine wave generation module and SPWM wave generation module at unit, the triangular wave generation module is adopted
It is completed with forward-backward counter, obtains digitlization triangular wave data by recycling plus-minus counting；The sine wave generation module uses
Direct digital frequency synthesis technology directly synthesizes required sine wave from the angle of phase；The SPWM wave generation module difference
It is connected with the triangular wave generation module, the sine wave generation module, the triangular wave of input is compared with sine wave:
If the triangular wave is greater than the sine wave, output shutdown low-voltage, if the triangular wave is less than the sine wave, output conducting
High voltage.
5. a kind of inverter based on Induction Motor-Driven according to claim 4, which is characterized in that the driving unit
Using the dedicated integrated drive chips driving power device IGBT of the IGBT of IR2130,6 power devices can be controlled simultaneously
The turn-on and turn-off of IGBT.
6. a kind of inverter based on Induction Motor-Driven according to claim 5, which is characterized in that the inversion unit
The DC inverter of the continuous input cell is exported by alternating current using three-phase inverter bridge circuit.
7. according to claim 1 based on the inverter of Induction Motor-Driven described in any one of -6, which is characterized in that described
The inverter course of work includes the following steps:
Step (1): the voltage sensor acquires the output voltage signal of the asynchronous machine；
Step (2): A/D conversion is carried out by the A/D converting unit；
Step (3): the voltage signal of input is compared by the control processing unit with the alarm voltage: if more than described
Alarm voltage issues alarm signal by the alarm unit；If being less than the alarm voltage, (4) are entered step；
Step (4): the voltage signal of input is compared to obtain difference voltage with the reference voltage；
Step (5): the sine wave modulation degree is determined according to the difference voltage；
Step (6): the triangular wave generation module forward-backward counter counts input clock, first carries out add operation, from 0
Increase to the triangle crest value Uc, then execute subtraction, is decremented to 0 from the triangle crest value Uc, recycles to be formed with this
Triangular waveform；
Step (7): the sine wave generation module generates output sine wave according to the sine wave modulation degree；
Step (8): the triangular wave is compared with the sine wave: if the triangular wave is greater than the sine wave, output
Low voltage signal is turned off, if the triangular wave is less than the sine wave, output conducting high voltage signal realizes the SPWM pulse
Signal output；
Step (9): the SPWM pulse signal transports to the driving unit；
Step (10): the DC inverter that the inversion unit inputs the continuous input cell exports alternating current；
Step (11): it is handled by the filtering unit filters；
Step (12): output alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811324925.6A CN109149989A (en) | 2018-11-08 | 2018-11-08 | A kind of inverter based on Induction Motor-Driven |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811324925.6A CN109149989A (en) | 2018-11-08 | 2018-11-08 | A kind of inverter based on Induction Motor-Driven |
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| CN109149989A true CN109149989A (en) | 2019-01-04 |
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| CN201811324925.6A Pending CN109149989A (en) | 2018-11-08 | 2018-11-08 | A kind of inverter based on Induction Motor-Driven |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707951A (en) * | 2019-10-25 | 2020-01-17 | 国网江苏省电力有限公司盐城供电分公司 | Inverter control system based on asynchronous motor drive and control method thereof |
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| CN204858993U (en) * | 2015-07-31 | 2015-12-09 | 江苏省电力公司苏州供电公司 | Power supply converter |
| CN209046549U (en) * | 2018-11-08 | 2019-06-28 | 国网江苏省电力有限公司南通供电分公司 | A kind of inverter based on Induction Motor-Driven |
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2018
- 2018-11-08 CN CN201811324925.6A patent/CN109149989A/en active Pending
Patent Citations (4)
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| CN203368394U (en) * | 2013-08-09 | 2013-12-25 | 昆山协稳环保节能有限公司 | AC motor asynchronous servo control electricity-saving device |
| CN204258750U (en) * | 2014-11-28 | 2015-04-08 | 中国石油天然气集团公司 | The circuit exported based on GPS pulse per second (PPS) synchro source and system |
| CN204858993U (en) * | 2015-07-31 | 2015-12-09 | 江苏省电力公司苏州供电公司 | Power supply converter |
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| CN110707951A (en) * | 2019-10-25 | 2020-01-17 | 国网江苏省电力有限公司盐城供电分公司 | Inverter control system based on asynchronous motor drive and control method thereof |
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