CN209046549U - 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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- CN209046549U CN209046549U CN201821835314.3U CN201821835314U CN209046549U CN 209046549 U CN209046549 U CN 209046549U CN 201821835314 U CN201821835314 U CN 201821835314U CN 209046549 U CN209046549 U CN 209046549U
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Abstract
The utility model provides a kind of inverter based on Induction Motor-Driven, and 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 utility model generates SPWM pulse signal using triangular wave module compared with sine wave module, reduces the harmonic content in output waveform, improves the output quality of inverter.
Description
Technical field
The utility model 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 utility model Induction Motor-Driven, using modular design scheme, using triangular wave module and sine wave module
Compare and generate SPWM pulse signal, reduces the harmonic content in output waveform, improve the output quality of inverter.It is independent simultaneously
Functional module is also beneficial to later maintenance and upgrading.
Utility model content
The utility model provides a kind of inverter based on Induction Motor-Driven, using triangular wave module and sine wave module
Compare and generate SPWM pulse signal, reduces the harmonic content in output waveform, improve the output quality of inverter.
The utility model is specially a kind of inverter based on Induction Motor-Driven, and the inverter includes that direct current input is single
Member, signal acquisition unit, A/D converting unit, control processing unit, key-press input unit, display unit, storage unit, alarm
Unit controls wave generation unit, driving unit, inversion unit, filter unit and exchanges output unit, the continuous input cell
It is connected with the inversion unit, the signal acquisition unit, the A/D converting unit, the control processing unit, the control
Wave generation unit processed, the driving unit, the inversion unit, the filter unit, the exchange output unit are linked in sequence,
The control processing unit is also single with the key-press input unit, the display unit, the storage unit, the alarm respectively
Member is connected, and the signal acquisition unit is also connect with the exchange output unit；The inverter is handled by the control
The unit control control wave generation unit is compared judgement with sine wave to triangular wave and obtains corresponding SPWM pulse signal,
The amplitude of the sine wave is controlled according to the output voltage signal of the asynchronous machine, and then controls the SPWM pulse signal
Amplitude, and input the driving unit and drive the inversion unit that DC inverter is exported alternating current, it realizes to described asynchronous
The driving of motor.
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 utility model.
Fig. 2 is a kind of inverter work flow diagram based on Induction Motor-Driven of the utility model.
Specific embodiment
The specific embodiment of the inverter based on Induction Motor-Driven a kind of to the utility model is done with reference to the accompanying drawing
It elaborates.
As shown in Figure 1, the inverter of the utility model includes continuous input cell, signal acquisition unit, A/D conversion list
Member, control processing unit, key-press input unit, display unit, storage unit, alarm unit, control wave generation unit, driving are single
Member, inversion unit, filter unit and output unit is exchanged, the continuous input cell is connected with the inversion unit, described
Signal acquisition unit, the A/D converting unit, the control processing unit, the control wave generation unit, the driving are single
First, the described inversion unit, the filter unit, the exchange output unit are linked in sequence, and the control processing unit is also distinguished
It is connected with the key-press input unit, the display unit, the storage unit, the alarm unit, the signal acquisition
Unit is also connect with the exchange output unit；The inverter controls the control wave by the control processing unit and generates
Unit is compared judgement with sine wave to triangular wave and obtains corresponding SPWM pulse signal, according to the output of the asynchronous machine
Voltage signal controls the amplitude of the sine wave, and then controls the amplitude of the SPWM pulse signal, and it is single to input the driving
Member drives the inversion unit that DC inverter is exported alternating current, realizes 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 the technical solution of the utility model in conjunction with above-described embodiment rather than limiting it
System.Those of ordinary skills in the art should understand that arriving, those skilled in the art can be to the specific implementation of the utility model
Mode is modified or replaced equivalently, but these modifications or change are being applied among pending claims.
Claims (6)
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
The control processing unit is inputted as feedback signal after A/D conversion.
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, the SPWM wave generation module point at unit
It is not connected with the triangular wave generation module, the sine wave generation module.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821835314.3U CN209046549U (en) | 2018-11-08 | 2018-11-08 | A kind of inverter based on Induction Motor-Driven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821835314.3U CN209046549U (en) | 2018-11-08 | 2018-11-08 | A kind of inverter based on Induction Motor-Driven |
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| CN209046549U true CN209046549U (en) | 2019-06-28 |
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| CN201821835314.3U Expired - Fee Related CN209046549U (en) | 2018-11-08 | 2018-11-08 | A kind of inverter based on Induction Motor-Driven |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149989A (en) * | 2018-11-08 | 2019-01-04 | 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 |
| 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 |
-
2018
- 2018-11-08 CN CN201821835314.3U patent/CN209046549U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149989A (en) * | 2018-11-08 | 2019-01-04 | 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 |
| 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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| GR01 | Patent grant | ||
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Granted publication date: 20190628 Termination date: 20191108 |