CN103812310B - The method of controlling switch of a kind of three phase full bridge topology loop and device - Google Patents
The method of controlling switch of a kind of three phase full bridge topology loop and device Download PDFInfo
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- CN103812310B CN103812310B CN201210439815.0A CN201210439815A CN103812310B CN 103812310 B CN103812310 B CN 103812310B CN 201210439815 A CN201210439815 A CN 201210439815A CN 103812310 B CN103812310 B CN 103812310B
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Abstract
The invention discloses method of controlling switch and the device of a kind of three phase full bridge topology loop, wherein, the method of controlling switch of described three phase full bridge topology loop includes: obtain three-phase voltage Va, Vb, Vc of AC, DC voltage Vdc and the switch periods of switching tube；Three-phase voltage Va, Vb, Vc according to described AC, determines its sector, place；Three-phase voltage Va, Vb, Vc according to described AC, DC voltage Vdc and the switch periods of switching tube, obtain the ON time of switching tube；According to the ON time of sector, described three-phase voltage Va, Vb, Vc place Yu described switching tube, control opening or closing of switching tube.The method of controlling switch of the three phase full bridge topology loop that the employing present invention mentions and device not only can simplify the control algolithm of switching tube, simplify the control flow of switching tube, reduce switching loss, it is also possible to easier realize three-phase interleaver circuit.
Description
Technical field
The present invention relates to the control technical field of three phase full bridge topology, particularly relate to a kind of three phase full bridge topological ring
The method of controlling switch on road and device.
Background technology
In the loop switch control method of existing three phase full bridge topology, usual employing controls each respectively and opens
Close device opens and closes the pulsewidth regulation and control realizing whole three phase full bridge topology loop.As it is shown in figure 1,
For three phase full bridge topological circuit figure；If this circuit needs to carry out pulse-width controlled, whole circuit needs to control respectively
Opening and closing of six switching tubes of system, can realize, so that the control of whole switching tube is the most multiple
Miscellaneous.Especially in the complicated circuit of three-phase crisscross parallel, if needing to carry out pulsewidth modulation, then need point
Do not control the opening and closing of six switching tubes of each parallel branch, so that whole three-phase crisscross parallel
The on-off control of circuit complicated so that crisscross parallel circuit realiration difficulty.
Summary of the invention
Embodiments of the invention provide method of controlling switch and the device of a kind of three phase full bridge topology loop.For reaching
To above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
A kind of method of controlling switch of three phase full bridge topology loop, including:
Obtain three-phase voltage Va, Vb, Vc of AC, the switch week of DC voltage Vdc and switching tube
Phase；
Three-phase voltage Va, Vb, Vc according to described AC, determines its sector, place；
Opening of three-phase voltage Va, Vb, Vc according to described AC, DC voltage Vdc and switching tube
In the pass cycle, obtain the ON time of switching tube；
According to the ON time of sector, described three-phase voltage Va, Vb, Vc place Yu described switching tube, control out
Close opening or closing of pipe.
A kind of switch controlling device of three phase full bridge topology loop, including:
Information acquisition unit, for obtaining three-phase voltage Va, Vb, Vc of AC, DC voltage Vdc
And the switch periods of switching tube；
Determine unit, for three-phase voltage Va, Vb, Vc according to described AC, determine its sector, place；
ON time acquiring unit, for three-phase voltage Va, Vb, Vc according to described AC, DC side
Voltage Vdc and the switch periods of switching tube, obtain the ON time of switching tube；
Switch control unit, for according to sector, described three-phase voltage Va, Vb, Vc place and described switching tube
ON time, control the opening or closing of switching tube.
The method of controlling switch of a kind of three phase full bridge topology loop that the present invention provides and device, handed over by acquisition
Three-phase voltage Va, Vb, Vc of stream side, DC voltage Vdc and the switch periods of switching tube；According to institute
State three-phase voltage Va, Vb, Vc of AC, determine its sector, place；Three-phase electricity according to described AC
Pressure Va, Vb, Vc, DC voltage Vdc and the switch periods of switching tube, when obtaining the conducting of switching tube
Between；According to the ON time of sector, described three-phase voltage Va, Vb, Vc place Yu described switching tube, control out
Close opening or closing of pipe.The method of controlling switch of the three phase full bridge topology loop that the employing present invention mentions and dress
Put the control algolithm that not only can simplify switching tube, simplify the control flow of switching tube, it is also possible to easier
Realize three-phase interleaver circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of three phase full bridge topology loop；
The flow process of the method for controlling switch of a kind of three phase full bridge topology loop that Fig. 2 provides for the embodiment of the present invention
Figure;
The structure of the switch controlling device of a kind of three phase full bridge topology loop that Fig. 3 provides for the embodiment of the present invention
Schematic diagram
The sector of the method for controlling switch of a kind of three phase full bridge topology loop that Fig. 4 provides for the embodiment of the present invention
Divide figure.
Detailed description of the invention
On-off control side to a kind of three phase full bridge topology loop that the embodiment of the present invention provides below in conjunction with the accompanying drawings
Method and device are described in detail.
As in figure 2 it is shown, the on-off control side of a kind of three phase full bridge topology loop provided for the embodiment of the present invention
Method；The method includes:
S1: obtain opening of three-phase voltage Va, Vb, Vc of AC, DC voltage Vdc and switching tube
The pass cycle；
S2: according to three-phase voltage Va, Vb, Vc of described AC, determines its sector, place；
S3: according to three-phase voltage Va, Vb, Vc of described AC, DC voltage Vdc and switching tube
Switch periods, obtain switching tube ON time；
S4: according to the ON time of sector, described three-phase voltage Va, Vb, Vc place Yu described switching tube, control
Opening or closing of switching tube processed.
It should be noted that the method also includes:
Preset reference is A phase mutually, or is B phase, C phase；
Sectorization division is carried out mutually based on described benchmark.Sector partitioning standards is: as Va>=0, Vb<0, Vc>0
Time, it is the first sector；Work as Va>0, Vb<0, Vc≤0 be the second sector；As Va>0, Vb>=0, Vc<when 0,
It it is the 3rd sector；As Va≤0, Vb>0, Vc<when 0, be the 4th sector；As Va<0, Vb>0, Vc>=0 time,
It it is the 5th sector；As Va<0, Vb≤0, Vc>0 time, be the 6th sector.Described sector divides example and specifically may be used
To see shown in accompanying drawing 4, this accompanying drawing is on the basis of A phase voltage.
Also, it should be noted the method also includes:
According to each sector of described division, determine dutycycle and this fan of each switching tube in each sector
The switching tube persistently opened in continuously off or this sector in district.
The above ON time is that the dutycycle of switching tube is amassed with switch periods.
Below in conjunction with the circuit of three phase full bridge topology loop in accompanying drawing 1 to three phase full bridge topological ring of the present invention
The operation principle of the method for controlling switch on road is described in detail.
If SA1 in accompanying drawing 1, SB1, SC1, SA1 ', SB1 ', SC1 ' it is switching tube, described switching tube is permissible
For MOSFET or the IGBT of band diode.In circuit in described accompanying drawing 1, inductance all works in the electric current progressive die
Formula, sa1 represents the dutycycle of SA1 pipe, its down tube SA1 ' and upper pipe SA1 complementary switch;Remaining brachium pontis sb1
Represent the dutycycle of SB1 pipe, its down tube SB1 ' and upper pipe SB1 complementary switch;Sc1 represents accounting for of SC1 pipe
Empty ratio, its down tube SC1 ' and upper pipe SC1 complementary switch.Described complementary switch have ignored dead band, and this dead band is
Short circuit is caused in order to avoid upper down tube simultaneously turns on.Described dead band refers to that down tube is during complementary switch
Upper pipe will be opened, the moment that down tube will be closed, the protective time slot simultaneously closed off by upper and lower switching tube；Or
Person, upper pipe will close, the moment that down tube will be opened, the protective time slot simultaneously closed off by upper and lower switching tube.
After above protective time slot, corresponding switching tube is opened.
AC VA, VB, VC voltage and sector divide shown in drawings described below 4, on the basis of A phase, [0,
π/3) it is the first sector, [π/3,2 π/3) it is the second sector, [2 π/3, π) it is the 3rd sector, [π,
4 π/3) it is the 4th sector, [4 π/3,5 π/3) it is the 5th sector, [5 π/3, π) it is the 6th sector；
Such as: the control method provided according to the present invention can get when circuit is in the first sector work,
Vb voltage is minimum, and is negative, in the case of not considering dead band and other losses, and can be according to sc1=
(Vc-Vb)/Vdc, sa 1=(Va-Vb)/Vdc obtains dutycycle, and SB1=0, and SC1, SA1 press respectively
PWM works, and i.e. according to the described ON time of switching tube that gets respectively to SB1, SC1, SA1 switch
Control；Wherein, SB1=0 represents that switching tube SB1 closes in the ON time of the first sector always, then with institute
State the always on of SB1 ' complementary for SB1 then correspondence, it is not necessary to control；Only two of other two brachium pontis open
Close and press PWM work respectively, i.e. carry out opening or closing control according to PWM.
When circuit is in the second sector work, Va voltage is the highest, and is just, SA1=1, SB1, SC1 are respectively
Work by PWM, in the case of not considering dead band and other losses, sb1=1-(Va-Vb)/Vdc, sc1=
1-(Va-Vc)/Vdc；Wherein, SA1=1 represents that switching tube SA1 beats in the ON time of the second sector always
Open, then complementary with described SA1 SA1 ' is the most corresponding to close always, it is not necessary to control；Only other two brachium pontis
Two switch press respectively PWM work, i.e. carry out opening or closing control according to PWM.
When circuit is in the 3rd sector work: Vc voltage is minimum, and is negative, and SC1=0, SA1, SB1 are respectively
Work by PWM, in the case of not considering dead band and other losses, sa1=(Va-Vc)/Vdc, sb1=
(Vb-Vc)/Vdc；
When circuit is in the 4th sector work, Vb voltage is the highest, and is just, SB1=1, SC1, SA1 are respectively
Work by PWM, in the case of not considering dead band and other losses, sc1=1-(Vb-Vc)/Vdc, sa1=1-
(Vb-Va)/Vdc；
When circuit is in the 5th sector work: Va voltage is minimum, and is negative, and SA1=0, SB1, SC1 are respectively
Work by PWM, in the case of not considering dead band and other losses, sb1=(Vb-Va)/Vdc, sc1=
(Vc-Va)/Vdc；
When circuit is in the 6th sector work, Vc voltage is the highest, and is just, SC1=1, SA1, SB1 are respectively
Work by PWM, in the case of not considering dead band and other losses, sa1=1-(Vc-Va)/Vdc, sb1=
1-(Vc-Vb)/Vdc。
The method of controlling switch of the three phase full bridge topology loop that the present invention provides and conventional three-phase vector control method
Compare, in each switch periods, the brachium pontis switch motion that only two absolute value of voltage are relatively low, decrease switch
Loss, is especially lost reduction under the duty that power factor is higher and becomes apparent from, be additionally, since every
Only two switching tube actions of secondary every secondary control switch either on or off, it is possible to easier control switchs
Action sequence is to be more prone to realize crisscross parallel.
As it is shown on figure 3, the on-off control dress of a kind of three phase full bridge topology loop provided for the embodiment of the present invention
The structural representation put；This device includes:
Information acquisition unit 301, for obtaining three-phase voltage Va, Vb, Vc of AC, DC voltage
Vdc and the switch periods of switching tube；
Determine unit 302, for three-phase voltage Va, Vb, Vc according to described AC, determine its place
Sector；
ON time acquiring unit 303, for three-phase voltage Va, Vb, Vc according to described AC, directly
Stream side voltage Vdc and the switch periods of switching tube, obtain the ON time of switching tube；
Switch control unit 304, for opening with described according to sector, described three-phase voltage Va, Vb, Vc place
Close the ON time of pipe, control opening or closing of switching tube.
It should be noted that this device also includes:
Preset unit, be A phase mutually for preset reference, or be B phase, C phase；
Division unit, for carrying out sectorization division mutually based on described benchmark.
Also, it should be noted this device also includes:
Information selecting section is negative minimum phase voltage in each sector obtaining described division or is
The highest positive phase voltage；
Described switch control unit, is additionally operable to according to being negative minimum phase voltage in each sector described or being
The highest positive phase voltage, the switching tube persistently opened in continuously off or this sector in determining this sector；With
The state of the described corresponding switching tube that switching tube is complementary switch determined is opposite to that.
The method of controlling switch of a kind of three phase full bridge topology loop that the present invention provides and device, handed over by acquisition
Three-phase voltage Va, Vb, Vc of stream side, DC voltage Vdc and the switch periods of switching tube；According to institute
State three-phase voltage Va, Vb, Vc of AC, determine its sector, place；Three-phase electricity according to described AC
Pressure Va, Vb, Vc, DC voltage Vdc and the switch periods of switching tube, when obtaining the conducting of switching tube
Between；According to the ON time of sector, described three-phase voltage Va, Vb, Vc place Yu described switching tube, control out
Close opening or closing of pipe.The method of controlling switch of the three phase full bridge topology loop that the employing present invention mentions and dress
Put the control algolithm that not only can simplify switching tube, simplify the control flow of switching tube, it is also possible to easier
Realize three-phase interleaver circuit.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is
Can instruct relevant hardware by program to complete, described program can be stored in a computer-readable
Taking in storage medium, this program upon execution, comprises the steps: (step of method), described storage
Medium, such as: ROM/RAM, magnetic disc, CD etc..
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited to
This, any those familiar with the art, in the technical scope that the invention discloses, can readily occur in
Change or replacement, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should
It is as the criterion with described scope of the claims.
Claims (2)
1. the method for controlling switch of a three phase full bridge topology loop, it is characterised in that the method includes:
Obtain three-phase voltage Va, Vb, Vc of AC, the switch week of DC voltage Vdc and switching tube
Phase；
Three-phase voltage Va, Vb, Vc according to described AC, determines its sector, place；
Opening of three-phase voltage Va, Vb, Vc according to described AC, DC voltage Vdc and switching tube
In the pass cycle, obtain the ON time of switching tube；
According to the ON time of sector, described three-phase voltage Va, Vb, Vc place Yu described switching tube, control out
Close opening or closing of pipe；
Preset reference is A phase mutually, or is B phase, C phase；
Sectorization division is carried out mutually based on described benchmark；
According to each sector of described division, determine dutycycle and this fan of each switching tube in each sector
The switching tube persistently opened in continuously off or this sector in district.
2. the switch controlling device of a three phase full bridge topology loop, it is characterised in that this device includes:
Information acquisition unit, for obtaining three-phase voltage Va, Vb, Vc of AC, DC voltage Vdc
And the switch periods of switching tube；
Determine unit, for three-phase voltage Va, Vb, Vc according to described AC, determine its sector, place；
ON time acquiring unit, for three-phase voltage Va, Vb, Vc according to described AC, DC side
Voltage Vdc and the switch periods of switching tube, obtain the ON time of switching tube；
Switch control unit, for according to sector, described three-phase voltage Va, Vb, Vc place and described switching tube
ON time, control the opening or closing of switching tube；
Preset unit, be A phase mutually for preset reference, or be B phase, C phase；
Division unit, for carrying out sectorization division mutually based on described benchmark；
Described switch control unit, is additionally operable to each sector according to described division, determines in each sector each
The switching tube persistently opened in continuously off or this sector in the dutycycle of individual switching tube and this sector.
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| CN201210439815.0A CN103812310B (en) | 2012-11-06 | 2012-11-06 | The method of controlling switch of a kind of three phase full bridge topology loop and device |
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| CN201210439815.0A CN103812310B (en) | 2012-11-06 | 2012-11-06 | The method of controlling switch of a kind of three phase full bridge topology loop and device |
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| CN103812310A CN103812310A (en) | 2014-05-21 |
| CN103812310B true CN103812310B (en) | 2016-12-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101272104A (en) * | 2008-05-07 | 2008-09-24 | 中国科学院电工研究所 | Space vector modulation method |
| CN101295935A (en) * | 2007-12-10 | 2008-10-29 | 西北工业大学 | Optimizing PWM modulation method capable of restraining harmonic wave |
| CN101771361A (en) * | 2010-02-11 | 2010-07-07 | 哈尔滨工业大学 | Method for controlling direct power of grid-connected inverter without non-AC voltage sensor |
| CN102185513A (en) * | 2011-05-18 | 2011-09-14 | 华北电力大学（保定） | Parallel structure and control method for photovoltaic power generation grid-connected inverter |
| CN102624277A (en) * | 2012-04-18 | 2012-08-01 | 南京航空航天大学 | Dead-zone-free three-phase AC/DC converter with high-frequency rectifier bridge |
-
2012
- 2012-11-06 CN CN201210439815.0A patent/CN103812310B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295935A (en) * | 2007-12-10 | 2008-10-29 | 西北工业大学 | Optimizing PWM modulation method capable of restraining harmonic wave |
| CN101272104A (en) * | 2008-05-07 | 2008-09-24 | 中国科学院电工研究所 | Space vector modulation method |
| CN101771361A (en) * | 2010-02-11 | 2010-07-07 | 哈尔滨工业大学 | Method for controlling direct power of grid-connected inverter without non-AC voltage sensor |
| CN102185513A (en) * | 2011-05-18 | 2011-09-14 | 华北电力大学（保定） | Parallel structure and control method for photovoltaic power generation grid-connected inverter |
| CN102624277A (en) * | 2012-04-18 | 2012-08-01 | 南京航空航天大学 | Dead-zone-free three-phase AC/DC converter with high-frequency rectifier bridge |
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