CN107482919B - Control method based on Boost full-bridge isolated converter - Google Patents
Control method based on Boost full-bridge isolated converter Download PDFInfo
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- CN107482919B CN107482919B CN201710502170.3A CN201710502170A CN107482919B CN 107482919 B CN107482919 B CN 107482919B CN 201710502170 A CN201710502170 A CN 201710502170A CN 107482919 B CN107482919 B CN 107482919B
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- switch
- switching tube
- duty ratio
- tube
- bridge
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of control method based on Boost full-bridge isolated converter, the duty ratio D2 of the duty ratio D1 and second switch (S2) and third switching tube (S3) of first switch tube (S1) and the 4th switching tube (S4), 0 < D1 < 1, 0 < D2 < 1, and D1 ≠ D2, it is D2 by the duty ratio of T switch periods first switch tube (S1) and the 4th switching tube (S4), second switch (S2) and third switching tube (S3) duty ratio are D1, after T switch periods, first switch tube (S1) and the duty ratio of the 4th switching tube (S4) revert to D1, second switch (S2) and the duty ratio of third switching tube (S3) revert to D2, it circuits sequentially reciprocal.5th switching tube duty ratio is D0,0 < D0 < 1, the timing of 5th switching tube (S0) changes with the transformation of first switch tube (S1) and second switch (S2) duty ratio, always conducting complementary with the lesser switching tube of duty ratio in duty ratio D1 and duty ratio D2.
Description
Technical field
The present invention relates to a kind of control methods based on Boost full-bridge isolated converter.
Background technique
Boost full-bridge isolated converter has high frequency electrical isolation, and output power, voltage transformating ratio is high, input current
Ripple is small, and high reliability when load short circuits is highly suitable to be applied for the High voltage output DC converting field of insulation request
It closes.
The control method of traditional Boost full-bridge isolated converter specifically: when first switch tube S1 and the 4th switching tube S4
Sequence is consistent, and duty ratio D, second switch S2 is consistent with third switching tube S3 timing, duty ratio D, and first switch tube
S1 and 180 ° of phase difference of second switch S2 phase, duty ratio 0.5 < D < 1, the 5th switching tube S0 switching tube S1, switching tube S2,
Shutdown when switching tube S3 and switching tube S4 are both turned on.This control method makes the switching frequency of the 5th switching tube S0 be first switch
2 times of pipe S1, switch tube it is more demanding, loss is big, especially high-power occasion.
Summary of the invention
In order to overcome the shortcomings of the prior art, the present invention proposes a kind of control method based on Boost full-bridge isolated converter.
Control method of the present invention reduces the switching frequency of the 5th switching tube S0, reduces the turn-on time of switching tube, reduces loss,
The problem of avoiding the unidirectional bias of magnetic element simultaneously, further increases system reliability.
To achieve the above object the present invention adopts the following technical scheme:
Control method of the present invention issues driving letter to each switching tube by the duty ratio and timing of five switching tubes of adjusting
Number, it realizes the movement of switching tube, controls the output voltage and output power of converter.
The Boost full-bridge isolated converter that the present invention is based on does not control full-bridge, two support electricity by a H full-bridge, one
Appearance, a high frequency transformer, high-frequency inductor and clamp capacitor and the 5th switching tube composition.Wherein H full-bridge is by first switch tube,
Two switching tubes, third switching tube and the 4th switching tube composition, first switch tube is consistent with the 4th switching tube timing, second switch
It is consistent with third switching tube timing, also, when first switch tube, second switch, third switching tube and the conducting of the 4th switching tube
Carve it is identical, the 5th switching tube duty ratio be D0, it is complementary with the lesser switching tube of duty ratio in first switch tube and second switch
Conducting.First switch tube and the 4th switching tube duty ratio are D1, and second switch and third switching tube duty ratio are D2, by T
A switch periods first switch tube and the 4th switching tube duty ratio become D2, and second switch and third switching tube duty ratio become
D1, after T switch periods, first switch tube and the 4th switching tube duty ratio revert to D1, second switch and third
Switching tube duty ratio reverts to D2.
The switch periods T range are as follows: T > 0.
The timing of 5th switching tube changes with the transformation of first switch tube and second switch duty ratio.
Detailed description of the invention
Fig. 1 Boost full-bridge isolated converter topology；
Fig. 2 switching tube logic chart.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and the specific embodiments.
As shown in Figure 1, the Boost full-bridge isolated converter topology that the present invention is based on is not controlled entirely by a H full-bridge, one
Bridge, two Support Capacitor Ci, Co, a high frequency transformer T, high-frequency inductor L1 and clamp capacitor Cc and the 5th switching tube S0 group
At.Support Capacitor Ci is connected with filter inductance L1, and clamp capacitor Cc connects with the 5th switching tube S0, the support electricity being cascaded
Hold Ci and filter inductance L1 and the clamp capacitor Cc being cascaded are in parallel with H full-bridge progress with the 5th switching tube S0, H full-bridge
Outlet side connects the side high frequency transformer T, and the other side connection of high frequency transformer T does not control full-bridge, do not control full-bridge output finally
Side is in parallel with outlet side Support Capacitor Co, is built into available circuit topology.Wherein H full-bridge is by 4 opening with anti-paralleled diode
Close pipe S1, S2, S3, S4 composition；Full-bridge is not controlled by 4 diodes D1, D2, D3, D4 composition.
Control method of the present invention issues driving letter to each switch by the duty ratio and timing of five switching tube S0 of adjusting
Number, it realizes the movement of switching tube, controls the output voltage and output power of converter.
The logic of the switching tube is as shown in Figure 2:
H full-bridge is made of first switch tube S1, second switch S2, third switching tube S3 and the 4th switching tube S4, and first
Switching tube S1 and the 4th switching tube S4 timing are consistent, and second switch S2 is consistent with third switching tube S3 timing, first switch tube
S1, second switch S2, third switching tube S3 and the 4th switching tube S4 are simultaneously turned on, and the 5th switching tube S0 duty ratio is D0, with
The lesser switching tube complementation conducting of duty ratio, 0 < D0 < 1 in duty ratio D1 and duty ratio D2.
First switch tube S1 and the 4th switching tube S4 duty ratio are D1, and 0 < D1 < 1, second switch S2 and third
Switching tube S3 duty ratio is D2,0 < D2 < 1, is become by T switch periods first switch tube S1 and the 4th switching tube S4 duty ratio
For D2, second switch S2 and third switching tube S3 duty ratio become D1, after T switch periods, first switch tube S1
D1 is reverted to the 4th switching tube S4 duty ratio, second switch S2 and third switching tube S3 duty ratio revert to D2, T > 0；The
The timing of five switching tube S0 changes with the transformation of first switch tube S1 and second switch S2 duty ratio, always with duty ratio
Small switching tube complementation conducting.
It is compared with traditional control method, present invention decreases the switching frequencies of the 5th switching tube S0, reduce switching tube
The problem of turn-on time reduces loss, avoids magnetic element unidirectional bias, further increases system reliability.
Claims (2)
1. a kind of control method based on Boost full-bridge isolated converter, the Boost full-bridge isolated converter being based on is by one
H full-bridge, a uncontrollable rectifier full-bridge, the 5th switching tube (S0), clamp capacitor (Cc), two Support Capacitors (Ci, Co) and filtering
Inductance (L1) composition, Support Capacitor (Ci) are connected with filter inductance (L1), and clamp capacitor (Cc) is connected with the 5th switching tube (S0),
The Support Capacitor (Ci) and filter inductance (L1) being cascaded, and the clamp capacitor (Cc) being cascaded and the 5th switch
Pipe (S0) is in parallel with H full-bridge, and H full-bridge outlet side connects the side of high frequency transformer T, the other side connection of high frequency transformer T
Full-bridge is not controlled, the outlet side for not controlling full-bridge is in parallel with outlet side Support Capacitor (Co)；H full-bridge is by 4 with anti-paralleled diode
Switching tube composition, respectively first switch tube (S1), second switch (S2), third switching tube (S3) and the 4th switching tube
(S4), the 5th switching tube (S0) is made of the switching tube with anti-paralleled diode, first switch tube (S1) and the 4th switching tube
(S4) timing is consistent, and second switch (S2) is consistent with third switching tube (S3) timing, first switch tube (S1), second switch
(S2), third switching tube (S3) and the 4th switching tube (S4) become on state, first switch tube (S1) from off state simultaneously
Duty ratio and second switch (S2) duty ratio are unequal；5th switching tube (S0) duty ratio is D0, with first switch tube (S1)
Conducting complementary with that lesser switching tube of duty ratio in second switch (S2),
It is characterized by: the control method is, first switch tube (S1) and the 4th switching tube (S4) duty ratio are D1, second
Switching tube (S2) and third switching tube (S3) duty ratio are D2, are switched by T switch periods first switch tube (S1) and the 4th
Pipe (S4) duty ratio becomes D2, and second switch (S2) and third switching tube (S3) duty ratio become D1, using T switch week
After phase, first switch tube (S1) and the 4th switching tube (S4) duty ratio revert to D1, second switch (S2) and third switching tube
(S3) duty ratio reverts to D2；
The switch periods T range is T > 0.
2. the control method as described in claim 1 based on Boost full-bridge isolated converter, it is characterised in that: described
The timing of five switching tubes (S0) changes with the transformation of first switch tube (S1) and second switch (S2) duty ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710502170.3A CN107482919B (en) | 2017-06-27 | 2017-06-27 | Control method based on Boost full-bridge isolated converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710502170.3A CN107482919B (en) | 2017-06-27 | 2017-06-27 | Control method based on Boost full-bridge isolated converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107482919A CN107482919A (en) | 2017-12-15 |
| CN107482919B true CN107482919B (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710502170.3A Active CN107482919B (en) | 2017-06-27 | 2017-06-27 | Control method based on Boost full-bridge isolated converter |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111064415B (en) * | 2018-09-30 | 2021-05-18 | 广东威灵汽车部件有限公司 | Motor control device, method and system and vehicle |
| CN111509954A (en) * | 2020-05-26 | 2020-08-07 | 深圳市雷能混合集成电路有限公司 | Correction control method and device for pulse width modulation signal and switching power supply |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242624A (en) * | 2014-09-05 | 2014-12-24 | 中国科学院电工研究所 | Boost full-bridge circuit inrush starting current restraining method |
| CN104734485A (en) * | 2015-03-26 | 2015-06-24 | 中国科学院电工研究所 | Boost full-bridge circuit start impact current resonance inhibition method |
| CN105140908A (en) * | 2015-09-29 | 2015-12-09 | 中国科学院电工研究所 | Zero-voltage soft-switching control method for photovoltaic high-voltage DC transmission system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10263508B2 (en) * | 2015-07-21 | 2019-04-16 | Christopher Donovan Davidson | Single stage isolated AC/DC power factor corrected converter |
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2017
- 2017-06-27 CN CN201710502170.3A patent/CN107482919B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242624A (en) * | 2014-09-05 | 2014-12-24 | 中国科学院电工研究所 | Boost full-bridge circuit inrush starting current restraining method |
| CN104734485A (en) * | 2015-03-26 | 2015-06-24 | 中国科学院电工研究所 | Boost full-bridge circuit start impact current resonance inhibition method |
| CN105140908A (en) * | 2015-09-29 | 2015-12-09 | 中国科学院电工研究所 | Zero-voltage soft-switching control method for photovoltaic high-voltage DC transmission system |
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| CN107482919A (en) | 2017-12-15 |
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