CN109768720A - A kind of active power filtering rectification circuit - Google Patents
A kind of active power filtering rectification circuit Download PDFInfo
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- CN109768720A CN109768720A CN201910058591.0A CN201910058591A CN109768720A CN 109768720 A CN109768720 A CN 109768720A CN 201910058591 A CN201910058591 A CN 201910058591A CN 109768720 A CN109768720 A CN 109768720A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a kind of active power filtering rectification circuits, including collector ring economize on electricity road, DC link circuit, collector ring economize on electricity road includes input reactance L1, the main power circuit of several power component compositions, control circuit, sample circuit, the sample circuit is by the voltage of acquisition, current data is sent in control circuit, the control circuit outputs control signals to main power circuit, alternating current is fed through main power circuit through input reactance L1, the main power circuit is sent in DC converting link circuit after converting alternating current to direct current, it is exported after DC converting link.The present invention has the advantages that Topology Structure Design is simple, it is both able to satisfy input power factor regulation, additionally it is possible to adjust output voltage.System is equivalent to traditional two-stage type structure, reduces number of elements, improves high conversion efficiency, without additional low frequency isolation transformer.
Description
Technical field
The present invention relates to communication power supplies for electrical domain, in particular to a kind of active filter circuit.
Background technique
The energy sources of communication telecommunication network are communication power supply end, and it is telecommunications that function, which is to provide DC communication power supply,
The key link that communication network runs well only continuously improves communication power supply performance, improves power supply efficiency, could make entire
Power communications network it is efficient with it is energy saving.In power electronic technique, obtaining the rectified direct current that obtains of alternating current from power grid is
Most common a kind of unsteady flow scheme in communication power supply, is the output voltage in order to reduce ripple in the effect of wherein bulky capacitor.?
Only when input voltage is greater than the moment of output DC voltage in above scheme, therefore two poles of rectification can be just connected in rectifier diode
The angle of flow of pipe is less than degree, and input current is not the sine wave with input voltage same waveform, but serious distortion has occurred.
The spike shape electric current of this distortion also contains various higher hamonic waves, can make to power grid other than containing fundamental frequency component
At serious harmonic wave " pollution ".And the distortion of current waveform is considered as a kind of " Electric Power Disserve ", harm includes network voltage
Distortion, reactive loss and electromagnetic interference etc..
With the progress of power electronic technique, the appearance of full-controlled device such as MOSFET, IGBT, there has been proposed classical two
Grade formula power supply plan, i.e. prime AC-DC conversion circuit add rear class DC-DC conversion circuit.But the confession of two-stage type
The disadvantages of that there are costs is excessively high for electric scheme, component number is more and control is complicated.Proposing single-stage in industry in recent years has
Power filter, single-stage active filter circuit is generally booster circuit (boost topology), and current working mode is interrupted mould
Formula (DCM mode) has the following disadvantages: that (1) operating current there are larger current spike, increases switching device in circuit
Electrical stress and electromagnetic interference.(2) in order to reduce loss and reply light duty, the switching frequency of power device changes model
It encloses wider, increases the complexity of control and the design difficulty of filter element.(3) peak current under discontinuous operating mode increases
Cost, volume and the manufacture difficulty of passive element (such as inductance) in circuit.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of active filter circuit, which be can be improved
The transfer efficiency and reduction output voltage ripple amplitude of circuit.
To achieve the goals above, the technical solution adopted by the present invention are as follows: a kind of active power filtering rectification circuit, including rectification
Link circuit, DC link circuit, collector ring economize on electricity road include the main power of input reactance L1, several power components composition
Circuit, control circuit, sample circuit, the voltage of acquisition, current data are sent in control circuit by the sample circuit, described
Control circuit outputs control signals to main power circuit, and alternating current is fed through main power circuit, the main function through input reactance L1
Rate circuit is sent in DC converting link circuit after converting alternating current to direct current, is exported after DC converting link.
The main power circuit includes power component transistor Q1, Q2, Q3, Q4, Q5, Q6, Q7, the emitter of transistor Q1
It is connect with the collector of transistor Q4, the collector of transistor Q1 is separately connected the collector of the collector of Q2, Q3, transistor Q2
Emitter and the collector of Q5 connect, the collector of the emitter of transistor Q3 and Q6 connect, the emitter of transistor Q4 with
The collector of transistor Q7 connects, and the emitter relevant connection of transistor Q5, Q6, Q7 are together；Three phase lines of three-phase alternating current
Respectively with the emitter of Q1, the emitter of Q2, Q3 emitter.
The sample circuit includes three-phase current sample circuit, three-phase voltage sample circuit, the three-phase voltage acquisition electricity
Road is connect with pll controller, and the pll controller is connect with rotating coordinate transformation device, rotating coordinate transformation device it is defeated
Enter three-phase voltage, the three-phase current of end input acquisition；The rotating coordinate transformation device output end output voltage values and given voltage
Value is input to the first pi controller after differing by subtracter and obtains given value of current value, and given value of current value is obtained with sampling
Current feedback values difference after be sent in the second pi controller after export modulation wave signal, modulation wave signal is sent to
Impulse modulation generator generates the impulse waveform of pulse width variability, utilizes each power component in pulse shape control main power circuit
Conducting.
The DC link circuit includes DC control circuit, transistor Q7, isolating transformer T1, the transmitting of transistor Q7
Pole connects one end of isolating transformer primary side, and the primary side other end of isolating transformer passes through inductance L2, capacitor C1 and crystal
The collector of pipe Q7 connects, and DC control circuit issues control signal to control the conducting of Q7.
The secondary side of isolating transformer T1 is equipped with rectifier diode D1 and output filter capacitor C2.
The DC control circuit includes current detection circuit, voltage detecting circuit, pwm generator, the voltage
Detection circuit is used to detect the voltage value of isolating transformer output, obtains output voltage value of feedback, the input of output voltage value of feedback
It is sent to after being differed into subtracter with voltage given value in third pi controller, passes through third pi controller
Given value of current value is exported, given value of current value differs with the input current value of feedback that current detection circuit detects, and is then fed into the
In four pi controllers, the 4th pi controller exports modulation wave signal, is then generated by pwm generator
Whether variable pulse waveform controls the conducting of transistor Q7.
The present invention has the advantages that Topology Structure Design is simple, by the multiplexing of element in circuit, reduce the number of element
Amount, reduces installation cost, improves the power density of device.Circuit structure is equivalent to traditional two-stage type structure, reduces
Intermediate DC link improves high conversion efficiency and needs additional low frequency isolation transformer, simplifies circuit structure.For this electricity
The road present invention devises corresponding control strategy and modulator approach, can both guarantee the power factor for rectifying link, moreover it is possible to guarantee
DC bus-bar voltage is stablized, while guaranteeing output DC load side voltage stabilization by control, can be realized three control targets.
Detailed description of the invention
Below to each width attached drawing of description of the invention expression content and figure in label be briefly described:
Fig. 1 is active power filtering rectification circuit topology diagram of the present invention；
Fig. 2 is present invention rectification link control principle schematic diagram；
Fig. 3 is DC converting Absent measures schematic illustration of the present invention.
Specific embodiment
A specific embodiment of the invention is made further detailed below against attached drawing by the description to optimum embodiment
Thin explanation.
The present embodiment provides a kind of Multi- Switch isolated active filter circuit, it is few to have component devices quantity, has circuit
The characteristics of isolation, while can be improved the transfer efficiency of circuit, reduce output voltage ripple amplitude.The circuit includes rectification link
With DC converting link circuit two parts circuit, wherein two parts circuit shares power component Q7.Rectification link include exchange
Input reactance L1, several power components Q1~Q7, capacitor C0 etc..
DC converting link includes power component part Q7, inductance L2, capacitor C1, high-frequency isolation transformer T1, and rectification
Diode D1, output filter capacitor C2.
It specifically includes: active power filtering rectification circuit, including collector ring economize on electricity road, DC link circuit, collector ring economize on electricity road
Including input reactance L1, several power components form main power circuit, control circuit, sample circuit,
Main power circuit includes power component transistor Q1, Q2, Q3, Q4, Q5, Q6, Q7, the emitter and crystalline substance of transistor Q1
The collector of body pipe Q4 connects, and the collector of transistor Q1 is separately connected the collector of the collector of Q2, Q3, the hair of transistor Q2
The connection of the collector of emitter-base bandgap grading and Q5, the emitter of transistor Q3 and the collector of Q6 connect, the emitter and crystal of transistor Q4
The collector of pipe Q7 connects, and the emitter relevant connection of transistor Q5, Q6, Q7 are together；Three phase line difference of three-phase alternating current
With the emitter of Q1, the emitter of Q2, Q3 emitter.
The voltage of acquisition, current data are sent in control circuit by sample circuit, and control circuit is output control signals to
Main power circuit, alternating current are fed through main power circuit through input reactance L1, and main power circuit converts alternating current to direct current
After be sent in DC converting link circuit, exported after DC converting link.
Sample circuit includes three-phase current sample circuit, three-phase voltage sample circuit, three-phase voltage Acquisition Circuit and locking phase
Ring controller connection, pll controller are connect with rotating coordinate transformation device, and the input terminal of rotating coordinate transformation device inputs acquisition
Three-phase voltage, three-phase current；Rotating coordinate transformation device output end output voltage values are differed with given voltage value by subtracter
After be input to the first pi controller and obtain given value of current value, given value of current value is differed with the current feedback values that sampling obtains
After be sent in the second pi controller after export modulation wave signal, modulation wave signal be sent to impulse modulation generator production
The impulse waveform of raw pulse width variability, utilizes the conducting of each power component in pulse shape control main power circuit.
As shown in Fig. 2, with AC voltage sensor sampling three-phase alternating voltage, with current sensor sampling three-phase alternating current
Stream.Three-phase alternating voltage obtains rotation angle w by pll controller.Rotating coordinate transformation device is input abc three-phase voltage/electricity
Stream becomes the voltage value in dq reference axis respectively.Wherein voltage given value is differed with feedback voltage, using proportional plus integral control
Device (PI), obtains the given value of electric current.Given value of current value is differed with current feedback values, is obtained using pi controller (PI)
To modulation wave signal, the impulse waveform of pulse width variability is finally generated by impulse modulation generator.
DC link circuit includes DC control circuit, transistor Q7, isolating transformer T1, and the emitter of transistor Q7 connects
One end of isolating transformer primary side is connect, the primary side other end of isolating transformer passes through inductance L2, capacitor C1 and transistor Q7
Collector connection, DC control circuit issues control signal to control the conducting of Q7.The secondary side of isolating transformer T1 is equipped with
Rectifier diode D1 and output filter capacitor C2.
DC control circuit includes current detection circuit, voltage detecting circuit, pwm generator, the voltage detecting
Circuit is used to detect the voltage value of isolating transformer output, obtains output voltage value of feedback, output voltage value of feedback, which is input to, to be subtracted
It is sent to after being differed in musical instruments used in a Buddhist or Taoist mass with voltage given value in third pi controller, is exported by third pi controller
Given value of current value, given value of current value are differed with the input current value of feedback that current detection circuit detects, and are then fed into the 4th ratio
In example integral controller, the 4th pi controller exports modulation wave signal, is then generated by pwm generator variable
Whether the conducting of pulse shape control transistor Q7.
Such as Fig. 3, control circuit includes: current detection circuit, output voltage detecting circuit, pwm generator.With straight
Galvanic electricity pressure sensor detection output voltage obtains output voltage value of feedback, detects detection input current with current sensor and obtains electricity
Flow value of feedback.Wherein voltage given value is differed with feedback voltage, using pi controller (PI), obtains the given of electric current
Value.Given value of current value is differed with current feedback values, modulation wave signal is obtained using pi controller (PI), finally by arteries and veins
The impulse waveform of modulated generator generation pulse width variability.
Particularly for wherein common circuit part, the driving signal of Q1 is controlled by the pulse-width signal of rectification link,
And the driving signal of Q4 is obtained by the modulated signal exclusive or of Q1 and Q7, the driving signal of Q7 by DC link pulse-width signal
Control.For no common circuit part, the signal of Q2, Q3, Q5, Q6 are controlled by rectification link pulse width signal.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as using method concept and skill of the invention
The improvement for the various unsubstantialities that art scheme carries out, it is within the scope of the present invention.
Claims (6)
1. a kind of active power filtering rectification circuit, it is characterised in that: including collector ring economize on electricity road, DC link circuit, the rectification
Link circuit include input reactance L1, several power components composition main power circuit, control circuit, sample circuit, it is described to adopt
The voltage of acquisition, current data are sent in control circuit by sample circuit, and the control circuit outputs control signals to main power
Circuit, alternating current is fed through main power circuit through input reactance L1, after the main power circuit converts alternating current to direct current
It is sent in DC converting link circuit, is exported after DC converting link.
2. a kind of active power filtering rectification circuit as described in claim 1, it is characterised in that: the main power circuit includes power
The emitter of element transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, transistor Q1 are connect with the collector of transistor Q4, transistor
The collector of Q1 is separately connected the collector of the collector of Q2, Q3, and the emitter of transistor Q2 and the collector of Q5 connect, crystal
The emitter of pipe Q3 and the collector of Q6 connect, and the emitter of transistor Q4 is connect with the collector of transistor Q7, transistor Q5,
The emitter relevant connection of Q6, Q7 are together；Three phase lines of three-phase alternating current respectively with the emitter of Q1, the emitter of Q2, Q3
Emitter.
3. a kind of active power filtering rectification circuit as claimed in claim 2, it is characterised in that: the sample circuit includes three-phase electricity
Sample circuit, three-phase voltage sample circuit are flowed, the three-phase voltage Acquisition Circuit is connect with pll controller, the phaselocked loop
Controller is connect with rotating coordinate transformation device, three-phase voltage, the three-phase current of the input terminal input acquisition of rotating coordinate transformation device；
The rotating coordinate transformation device output end output voltage values and given voltage value are input to the first ratio after differing by subtracter
Integral controller obtains given value of current value, and given value of current value is sent to the second ratio after differing with the current feedback values that sampling obtains
Modulation wave signal is exported after in integral controller, modulation wave signal is sent to the pulse that impulse modulation generator generates pulse width variability
Waveform utilizes the conducting of each power component in pulse shape control main power circuit.
4. a kind of active power filtering rectification circuit as described in claim 1, it is characterised in that: the DC link circuit includes straight
Flow control circuit, transistor Q7, isolating transformer T1, one end of the emitter connection isolating transformer primary side of transistor Q7,
The primary side other end of isolating transformer is connect by inductance L2, capacitor C1 with the collector of transistor Q7, DC control circuit
Control signal is issued to control the conducting of Q7.
5. a kind of active power filtering rectification circuit as claimed in claim 4, it is characterised in that: the secondary side of isolating transformer T1 is set
There is rectifier diode D1 and output filter capacitor C2.
6. a kind of active power filtering rectification circuit as claimed in claim 4, it is characterised in that: the DC control circuit includes electricity
Current detection circuit, voltage detecting circuit, pwm generator, the voltage detecting circuit is for detecting isolating transformer output
Voltage value, obtain output voltage value of feedback, output voltage value of feedback is input in subtracter differed with voltage given value after give
Enter into third pi controller, given value of current value, given value of current value and electricity are exported by third pi controller
The input current value of feedback difference of current detection circuit detection, is then fed into the 4th pi controller, the 4th ratio product
Sub-controller exports modulation wave signal, and the conducting of variable pulse waveform control transistor Q7 is then generated by pwm generator
Whether.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910058591.0A CN109768720B (en) | 2019-01-22 | 2019-01-22 | Active filter rectification circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910058591.0A CN109768720B (en) | 2019-01-22 | 2019-01-22 | Active filter rectification circuit |
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| CN109768720A true CN109768720A (en) | 2019-05-17 |
| CN109768720B CN109768720B (en) | 2021-02-02 |
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| CN1701500A (en) * | 2003-07-15 | 2005-11-23 | 三菱电机株式会社 | Three-phase power converter and power converter |
| US20090059625A1 (en) * | 2007-09-05 | 2009-03-05 | Abb Oy | Single-phase to three-phase converter |
| CN103944395A (en) * | 2014-04-04 | 2014-07-23 | 上海电机学院 | Preceding stage DC converter for proton exchange membrane fuel cell and construction method thereof |
| CN204290758U (en) * | 2014-12-26 | 2015-04-22 | 深圳市酷孚科技有限公司 | Adaptive voltage output power supply circuit and supply unit |
| CN105071675A (en) * | 2015-07-23 | 2015-11-18 | 浙江大学 | Hybrid power switch and application thereof in flexible direct current power transmission converter |
| CN105577008A (en) * | 2015-12-31 | 2016-05-11 | 东南大学 | Three-phase rectification type power electronic transformer and DC voltage coordinative control method thereof |
| CN107659138A (en) * | 2017-10-26 | 2018-02-02 | 燕山大学 | A kind of tandem type power decoupled no electrolytic capacitor pfc circuit and decoupling control method |
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2019
- 2019-01-22 CN CN201910058591.0A patent/CN109768720B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701500A (en) * | 2003-07-15 | 2005-11-23 | 三菱电机株式会社 | Three-phase power converter and power converter |
| US20090059625A1 (en) * | 2007-09-05 | 2009-03-05 | Abb Oy | Single-phase to three-phase converter |
| CN103944395A (en) * | 2014-04-04 | 2014-07-23 | 上海电机学院 | Preceding stage DC converter for proton exchange membrane fuel cell and construction method thereof |
| CN204290758U (en) * | 2014-12-26 | 2015-04-22 | 深圳市酷孚科技有限公司 | Adaptive voltage output power supply circuit and supply unit |
| CN105071675A (en) * | 2015-07-23 | 2015-11-18 | 浙江大学 | Hybrid power switch and application thereof in flexible direct current power transmission converter |
| CN105577008A (en) * | 2015-12-31 | 2016-05-11 | 东南大学 | Three-phase rectification type power electronic transformer and DC voltage coordinative control method thereof |
| CN107659138A (en) * | 2017-10-26 | 2018-02-02 | 燕山大学 | A kind of tandem type power decoupled no electrolytic capacitor pfc circuit and decoupling control method |
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