CN109004650A - A kind of SPWM pulse duration modulation method of modularization APF active filter - Google Patents
A kind of SPWM pulse duration modulation method of modularization APF active filter Download PDFInfo
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- CN109004650A CN109004650A CN201810884540.9A CN201810884540A CN109004650A CN 109004650 A CN109004650 A CN 109004650A CN 201810884540 A CN201810884540 A CN 201810884540A CN 109004650 A CN109004650 A CN 109004650A
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- sine
- pulse duration
- modulation method
- active filter
- modularization
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to active filter technical fields, and disclose a kind of SPWM pulse duration modulation method of modularization APF active filter, include the following steps: to make an all discrete unit sinusoidal sequence on time and amplitude, that is sine table, and it is stored in space, it is used herein as Excel tool and carries out production sine table, the angular resolution of sine table is determined by practical application, the electric period complete for one, 1024 points are able to satisfy the demand of major applications, when sine wave generates, effective sample point is more, voltage and current harmonic wave is smaller, effect is better, when determining sine table length, also need the size because being known as the program space considered, the speed of power switch tube, effective resolution and speed ratio of PWM etc..The SPWM pulse duration modulation method of modularization APF active filter, has the advantages that SPWM pulse duration modulation method is more efficient, and it is lower to solve SPWM pulse duration modulation method efficiency in the prior art, is not easy to the problem of people use.
Description
Technical field
The present invention relates to active filter technical field, specially a kind of SPWM pulsewidth of modularization APF active filter
Modulator approach.
Background technique
What APF referred to is exactly Active Power Filter-APF, is a kind of for dynamic harmonic wave, the novel electric power electricity of compensating reactive power
Sub-device, the harmonic wave and the idle of variation that it can all change size and frequency compensate, why referred to as active, care for
The name Si Yi device needs to provide power supply, using the harmonics restraint and reactive-load compensation method that LC filter etc. can be overcome traditional
Disadvantage (traditional can only fixed compensation) realizes dynamically track compensation, and can not only mend harmonic wave but also mend idle；Three-phase circuit
Instantaneous reactive power theory is that the main foundation of APF development is theoretical；APF has parallel connection type and two kinds of tandem type, the former is more；And
It is associated with source filter and mainly administers current harmonics, series active power filter mainly administers the problem of voltage harmonic etc. causes.
Active filter compares with passive filter, and regulation effect is good, can mainly filter out multiple and higher hamonic wave simultaneously, will not cause
Resonance, but price is relatively high.
SPWM, exactly changes modulation pulse mode on the basis of PWM, and pulse width time duty ratio presses sinusoidal rule
Arrangement, such output waveform can accomplish sinewave output by filtering appropriate.It is widely used for dc-to-ac inverter
Deng, for example more advanced UPS is exactly an example.Three-phase SPWM is exported using the three-phase of SPWM simulation alternating current, in frequency conversion
Device field is widely used.
Pulse-width controlled technology (PWM) is very important power electronics control technology, to the property for improving power electronic equipment
Can, promote the development of power electronic technique to have huge impetus.Wherein, SPWM Technique (SPWM) is application
Widest PWM technology, SPWM is in high performance motor driving, Design of Stepper Motor Subdivision control, variable-frequency power sources, electronic power inversion
Control etc. has important application.Enter this industry in particular with FPGA technology, there is the application of SPWM technology more
Significant progress, make its obtained it is more efficient, deeper into wider application.
SPWM pulse duration modulation method efficiency in the prior art is lower, is not easy to people's use.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of SPWM pulse duration modulation method of modularization APF active filter,
Have the advantages that SPWM pulse duration modulation method is more efficient, solve SPWM pulse duration modulation method efficiency in the prior art compared with
It is low, it is not easy to the problem of people use.
(2) technical solution
To realize the higher purpose of SPWM pulse duration modulation method efficiency, the invention provides the following technical scheme:
A kind of SPWM pulse duration modulation method of modularization APF active filter, includes the following steps:
S1. an all discrete unit sinusoidal sequence on time and amplitude, i.e. sine table are made, and is stored in space, this
Place carries out production sine table using Excel tool, and the angular resolution of sine table is determined by practical application, complete for one
Electric period, 1024 points are able to satisfy the demand of major applications, and when sine wave generates, effective sample point is more, and voltage and current is humorous
Wave is smaller, and effect is better, when determining sine table length, also needs the size because being known as the program space considered, power switch tube
Speed, effective resolution and speed ratio of PWM etc.；
S2. by fpwmL, the length of sine table is calculated in 10*fmax formula
Wherein in f application, corresponding sine wave highest frequency, and N should be not less than 60；
S3. it is compared with one group of virtual triangular wave with a sine wave, wherein virtual triangular wave is specially virtual
Isosceles triangle wave, intersection at the time of (i.e. intersection point) as switching tube "ON" or "Off"；
S3. U phase voltage is set, makes PWM work that section and switching tube cut-off section be connected in switching tube, generates it virtual etc.
Kidney-shaped triangular wave, corresponding PWM each time are interrupted, and then update switching tube and section is connected；
S4. sine wave is exported
A. according to V/F curve, index of modulation m is determined；
B. phase stepping value is determined according to carrier frequency；
C. it is interrupted according to PWM each time, then according to the phase stepping step value for being worth determining sine table；
D. sine table is looked into, sine value is taken, calculates the time in switching tube conducting section；
E. PWM duty cycle is updated；
Similarly, the production method of other two-phase sine waves is identical, only differs 120 degree in phase each other, i.e., so-called three is equal
Weighing apparatus electricity；.
Preferably, due to the alternating current that the signal being applied on motor is three-phase equilibrium, amplitude is identical, and frequency is identical, phase
120 degree of potential difference, at any time, electric current always flows into come from two windings, spills out through a winding, or from a winding
It flows into and, spilt out through two windings, it is therefore apparent that generator neutral point N voltage is always the half of DC bus-bar voltage.
Preferably, the SPWM technology auxiliary is with the triple-frequency harmonics addition method.
Preferably, the power tube is a series of not wide rectangular pulse waveform of constant amplitudes, and width is advised according to sine wave
Rule variation.
Preferably, the switch state of six switching tubes that control inverter is removed with PWM signal PWMIL-PWM3H.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of SPWM pulse duration modulation method of modularization APF active filter, have
Below the utility model has the advantages that
The SPWM pulse duration modulation method of modularization APF active filter since the frequency of triangular carrier is usually higher, thus is managed
It is concentrated mainly on higher frequency band by the harmonic frequency of its upper output voltage waveforms, so the filter by very little can
To obtain more satisfactory sinewave output voltage, intersected using sinusoidal control signal with high frequency triangle wave carrier signal and cut, produced
Raw sinusoidal pulse width modulation signal obtains the driving signal of power tube using links such as logical conversion, power amplifications, drives function
Rate pipe opens shutdown, so that the output end in inverter obtains Sine Modulated output, versatile, control and regulation performance are good,
With harmonic carcellation, the multiple action that adjusts and stabilize the output voltage, make the more efficient of SPWM pulse duration modulation method.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
A kind of SPWM pulse duration modulation method of modularization APF active filter, includes the following steps:
S1. an all discrete unit sinusoidal sequence on time and amplitude, i.e. sine table are made, and is stored in space, this
Place carries out production sine table using Excel tool, and the angular resolution of sine table is determined by practical application, complete for one
Electric period, 1024 points are able to satisfy the demand of major applications, and when sine wave generates, effective sample point is more, and voltage and current is humorous
Wave is smaller, and effect is better, when determining sine table length, also needs the size because being known as the program space considered, power switch tube
Speed, effective resolution and speed ratio of PWM etc.；
S2. by fpwmL, the length of sine table is calculated in 10*fmax formula
Wherein in f application, corresponding sine wave highest frequency, and N should be not less than 60；
S3. it is compared with one group of virtual triangular wave with a sine wave, wherein virtual triangular wave is specially virtual
Isosceles triangle wave, intersection at the time of (i.e. intersection point) as switching tube "ON" or "Off"；
S3. U phase voltage is set, makes PWM work that section and switching tube cut-off section be connected in switching tube, generates it virtual etc.
Kidney-shaped triangular wave, corresponding PWM each time are interrupted, and then update switching tube and section is connected；
S4. sine wave is exported
A. according to V/F curve, index of modulation m is determined；
B. phase stepping value is determined according to carrier frequency；
C. it is interrupted according to PWM each time, then according to the phase stepping step value for being worth determining sine table；
D. sine table is looked into, sine value is taken, calculates the time in switching tube conducting section；
E. PWM duty cycle is updated；
Similarly, the production method of other two-phase sine waves is identical, only differs 120 degree in phase each other, i.e., so-called three is equal
Weighing apparatus electricity；.
Since the signal being applied on motor is the alternating current of three-phase equilibrium, amplitude is identical, and frequency is identical, phase difference 120
Degree, at any time, electric current always flow into come from two windings, spill out through a winding, or flow into from a winding,
It is spilt out through two windings, it is therefore apparent that generator neutral point N voltage is always the half of DC bus-bar voltage.
The SPWM technology auxiliary is with the triple-frequency harmonics addition method.
The power tube is a series of not wide rectangular pulse waveform of constant amplitudes, and width changes according to sine wave rule.
The switch state of six switching tubes that control inverter is removed with PWM signal PWMIL-PWM3H.
In conclusion the SPWM pulse duration modulation method of modularization APF active filter, in use, due to triangular carrier
Frequency it is usually higher, thus theoretically the harmonic frequency of its output voltage waveforms is concentrated mainly on higher frequency band, institute
It can be obtained by more satisfactory sinewave output voltage with the filter Jing Guo very little, using sinusoidal control signal and high frequency three
Wave carrier signal signal intersection in angle is cut, and is generated sinusoidal pulse width modulation signal using links such as logical conversion, power amplifications and is obtained function
The driving signal of rate pipe, driving power pipe open shutdown, so that the output end in inverter obtains Sine Modulated output, versatility
By force, control and regulation performance are good, with harmonic carcellation, the multiple action for adjusting and stabilizing the output voltage, make SPWM pulsewidth modulation
Method it is more efficient.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of SPWM pulse duration modulation method of modularization APF active filter, characterized by the following steps:
S1. an all discrete unit sinusoidal sequence on time and amplitude, i.e. sine table are made, and is stored in space, this
Place carries out production sine table using Excel tool, and the angular resolution of sine table is determined by practical application, complete for one
Electric period, 1024 points are able to satisfy the demand of major applications, and when sine wave generates, effective sample point is more, and voltage and current is humorous
Wave is smaller, and effect is better, when determining sine table length, also needs the size because being known as the program space considered, power switch tube
Speed, effective resolution and speed ratio of PWM etc.；
S2. by fpwmL, the length of sine table is calculated in 10*fmax formula
Wherein in f application, corresponding sine wave highest frequency, and N should be not less than 60；
S3. it is compared with one group of virtual triangular wave with a sine wave, wherein virtual triangular wave is specially virtual
Isosceles triangle wave, intersection at the time of (i.e. intersection point) as switching tube "ON" or "Off"；
S3. U phase voltage is set, makes PWM work that section and switching tube cut-off section be connected in switching tube, generates it virtual etc.
Kidney-shaped triangular wave, corresponding PWM each time are interrupted, and then update switching tube and section is connected；
S4. sine wave is exported
A. according to V/F curve, index of modulation m is determined；
B. phase stepping value is determined according to carrier frequency；
C. it is interrupted according to PWM each time, then according to the phase stepping step value for being worth determining sine table；
D. sine table is looked into, sine value is taken, calculates the time in switching tube conducting section；
E. PWM duty cycle is updated；
Similarly, the production method of other two-phase sine waves is identical, only differs 120 degree in phase each other, i.e., so-called three is equal
Weighing apparatus electricity.
2. a kind of SPWM pulse duration modulation method of modularization APF active filter according to claim 1, feature exist
In: since the signal being applied on motor is the alternating current of three-phase equilibrium, amplitude is identical, and frequency is identical, and 120 degree of phase difference,
Any moment, electric current always are flowed into from two windings, be spilt out through a winding, or flow into from a winding, through two
A winding is spilt out, it is therefore apparent that generator neutral point N voltage is always the half of DC bus-bar voltage.
3. a kind of SPWM pulse duration modulation method of modularization APF active filter according to claim 1, feature exist
In: the SPWM technology auxiliary is with the triple-frequency harmonics addition method.
4. a kind of SPWM pulse duration modulation method of modularization APF active filter according to claim 1, feature exist
In: the power tube is a series of not wide rectangular pulse waveform of constant amplitudes, and width changes according to sine wave rule.
5. a kind of SPWM pulse duration modulation method of modularization APF active filter according to claim 1, feature exist
In: the switch state of six switching tubes that control inverter is removed with PWM signal PWMIL-PWM3H.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113472255A (en) * | 2021-07-01 | 2021-10-01 | 山东省科学院自动化研究所 | Power factor correction current phase-locked loop control method and motor control system |
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| CN103905017A (en) * | 2014-04-14 | 2014-07-02 | 西安交通大学 | Novel chaotic spread-spectrum SPWM wave generating method |
| CN105226932A (en) * | 2015-10-21 | 2016-01-06 | 上海大学 | High efficiency circuit of power factor correction topological structure and control method thereof |
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2018
- 2018-08-06 CN CN201810884540.9A patent/CN109004650A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905017A (en) * | 2014-04-14 | 2014-07-02 | 西安交通大学 | Novel chaotic spread-spectrum SPWM wave generating method |
| CN105226932A (en) * | 2015-10-21 | 2016-01-06 | 上海大学 | High efficiency circuit of power factor correction topological structure and control method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 李建林 等: ""基于载波移相SPWM技术的电流型有源电力滤波器的研究"", 《中国电机工程学报》 * |
| 马昭: ""数字式低压正弦波变频电源研究与实现"", 《自动化与仪表》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113472255A (en) * | 2021-07-01 | 2021-10-01 | 山东省科学院自动化研究所 | Power factor correction current phase-locked loop control method and motor control system |
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Application publication date: 20181214 |