CN108900090A - A kind of resonance isolated converter of ultra-wide range of regulation - Google Patents
A kind of resonance isolated converter of ultra-wide range of regulation Download PDFInfo
- Publication number
- CN108900090A CN108900090A CN201810727323.9A CN201810727323A CN108900090A CN 108900090 A CN108900090 A CN 108900090A CN 201810727323 A CN201810727323 A CN 201810727323A CN 108900090 A CN108900090 A CN 108900090A
- Authority
- CN
- China
- Prior art keywords
- llc
- link control
- logical link
- resonant network
- bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 230000006837 decompression Effects 0.000 abstract description 6
- 238000011217 control strategy Methods 0.000 description 3
- 238000010606 normalization Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/4815—Resonant converters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of resonance isolated converters of ultra-wide range of regulation, it is characterized in that, including the half-bridge logical link control (LLC) resonant network one with transformer one and with the half-bridge logical link control (LLC) resonant network two of transformer two, the secondary side of transformer one is the output end of half-bridge logical link control (LLC) resonant network one, the secondary side of transformer two is the output end of half-bridge logical link control (LLC) resonant network two, input voltage inputs half-bridge logical link control (LLC) resonant network one and half-bridge logical link control (LLC) resonant network two simultaneously, the output end of half-bridge logical link control (LLC) resonant network one connects load after being sequentially connected rectification circuit and filter circuit after connecting with the output end of half-bridge logical link control (LLC) resonant network two.The decompression ability of LLC resonance circuit is substantially improved in the present invention, can be depressurized to 0 under any loading condition；The no-voltage on state characteristic of primary side switch is substantially improved.
Description
Technical field
The present invention relates to a kind of resonance isolated converters.
Background technique
In numerous isolated form DC/DC converters, controlled resonant converter is isolated since its structure is simple, high-effect, Yi Shi in LLC
The advantages such as the no-voltage of existing primary side switch opens (ZVS) and the zero-current switching (ZCS) of secondary side diode, electromagnetic interference be low and obtain
To widely applying.
But there are two large problems for LLC resonant converter：
1) pressure regulating performance is limited, the decompression ability in the case of being especially lightly loaded.LLC resonant converter is frequency modulation(PFM) topology.
As shown in Figure 1, abscissa is normalization switching frequency (switching frequency/resonance frequency), ordinate is that (removal becomes normalized gain
The influence of transformer voltage ratio), different curves correspond to different Q value.Load is lighter, and Q value is smaller.As shown, the feelings of light load step-down
Under condition, change switching frequency for gain effects very little.
2) in normalization switching frequency much larger than 1 while in the case where being lightly loaded, it is special that primary side switch can lose no-voltage conducting
Property.
On the one hand above-mentioned two problems make LLC resonance circuit be unable to satisfy the wide-voltage-regulation requirement much applied.Another party
Face, the loss of no-voltage on state characteristic is so that switching loss increase, easily initiation current spike, increase electromagnetic interference problem.
Summary of the invention
The object of the present invention is to provide a kind of improvement project of LLC circuit, it is made to inherit the same of LLC resonance circuit advantage
When, expand its range of regulation, enhances its Sofe Switch characteristic.
In order to achieve the above object, the technical solution of the present invention is to provide a kind of isolation of the resonance of ultra-wide range of regulation to become
Parallel operation, which is characterized in that humorous including the half-bridge logical link control (LLC) resonant network one with transformer one and the half-bridge LLC with transformer two
Vibrating network two, the secondary side of transformer one are the output end of half-bridge logical link control (LLC) resonant network one, and the secondary side of transformer two is that half-bridge LLC is humorous
The output end of vibrating network two, input voltage input half-bridge logical link control (LLC) resonant network one and half-bridge logical link control (LLC) resonant network two, half-bridge LLC simultaneously
It is passed through after the output end of resonant network one and the series connection of the output end of half-bridge logical link control (LLC) resonant network two and load is connect by current rectifying and wave filtering circuit.
Preferably, the current rectifying and wave filtering circuit includes sequentially connected rectification circuit and filter circuit, rectification circuit and institute
The output end for stating half-bridge logical link control (LLC) resonant network one and the half-bridge logical link control (LLC) resonant network two is connected, and filter circuit connects the load.
Preferably, the half-bridge logical link control (LLC) resonant network one is identical as the circuit structure of the half-bridge logical link control (LLC) resonant network two.
Preferably, the half-bridge logical link control (LLC) resonant network one or the half-bridge logical link control (LLC) resonant network two include switch one and switch
Two, one end of switch one and switch two forms the input of the half-bridge logical link control (LLC) resonant network one or the half-bridge logical link control (LLC) resonant network two
End, the other end of switch one connect one end of inductance after being connected with the other end of switch two, the other end of inductance connects transformer
One or transformer two primary side one end, one end of the other end connection capacitor of the primary side of transformer one or transformer two, capacitor
The other end be connected with one end of switch two, also bridging has excitation electric between the both ends of the primary side of transformer one or transformer two
Sense.
Preferably, the rectification circuit uses diode rectifier bridge.
Preferably, the filter circuit uses capacitive filter.
Important beneficial effect of the invention：
1) the decompression ability of LLC resonance circuit is substantially improved, 0 can be depressurized under any loading condition.
2) compared with traditional LLC circuit, the no-voltage on state characteristic of primary side switch is substantially improved.This is because mentioned circuit
Frequency modulation control is replaced using the phase shifting control of two half-bridges in decompression, for single half-bridge, switching network output
(vab1, vab2) it is always the constant square wave of frequency, thus in magnetizing inductance Lm1With Lm2It is upper to generate invariable circulating current.
The size of circulating current is to influence the key factor of no-voltage on state characteristic.When circulating current size by output voltage and is not born
The influence of load, it is meant that the no-voltage on state characteristic of gamut.
Detailed description of the invention
Fig. 1 is the corresponding relationship of normalized voltage gain and working frequency in traditional LLC circuit；
Fig. 2 is compound half-bridge logical link control (LLC) resonant isolated variable circuit；
Fig. 3 is drive waveforms and half-bridge output waveform under frequency modulation control；
Fig. 4 is drive waveforms and half-bridge output waveform under phase shifting control；
Fig. 5 is the corresponding relationship of normalized voltage gain and phase shifting angle under phase shifting control.
Specific embodiment
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
A kind of resonance isolated converter of ultra-wide range of regulation disclosed by the invention proposes a kind of novel humorous based on LLC
Vibration topology and corresponding control strategy.Ultra-wide range of regulation may be implemented using topological and control strategy, resonance circuit is mentioned,
On the one hand it has excellent boosting characteristic identical with traditional LLC resonance circuit.It on the other hand, can under any loading condition
To be depressurized to zero.Furthermore the no-voltage conducting of primary side switch can be realized in full load, gain ranging.
A kind of circuit structure of the resonance isolated converter of ultra-wide range of regulation disclosed by the invention is as shown in Figure 2.Input
Voltage VinAccess two identical half-bridge logical link control (LLC) resonant networks.The half-bridge logical link control (LLC) resonant network of top is by switch S1, switch S2, inductance
Lr1, capacitor Cr1, magnetizing inductance Lm1With transformer T1It constitutes.The half-bridge logical link control (LLC) resonant network of lower section is by switch S3, switch S4, inductance
Lr2, capacitor Cr2, magnetizing inductance Lm2With transformer T2It constitutes.Two half-bridge logical link control (LLC) resonant networks pass through transformer T1With transformer T2
Secondary side be cascaded, behind connect by diode D1To D4The diode rectifier bridge and capacitive filter C of compositiono, most it is followed by bearing
Carry R0。
Above-mentioned control strategy is divided into two kinds：One is use frequency modulation control when boosting；Using shifting when another kind is decompression
Phase control.Drive waveforms and half-bridge output waveform are as shown in Figure 3 under frequency modulation control.Signal vgs1-4To inductive switch S1-4Include dead zone
Drive waveforms, S1With S3Drive waveforms are identical, S2With S4Drive waveforms are identical.Signal vab1With vab2It is half-bridge output waveform,
It has been identified in Fig. 2.The v in frequency modulation controlab1With vab2Waveform is overlapped, changeable frequency.By reducing switching frequency, this
The circuit gain of invention is greater than 1 and adjustable.Its working method with traditional LLC circuit switch frequency less than 1 when consistent, gain curve
It can refer to normalization curve of the switching frequency less than 1 in Fig. 1.
Phase shifting control is used when decompression, drive waveforms and half-bridge output waveform are as shown in Figure 4.S at this time1With S2Driving letter
Number complementation has dead zone, S3With S4Signal complementation have dead zone, while S1、S2With S3、S4Switching frequency is constant, there is phase difference.It utilizes
The size of control phase shifting angle carrys out control circuit gain.As shown in figure 5, when phase shifting angle is 0, normalized gain 1；With phase shifting angle
Increase, gain reduces；When phase shifting angle is 180 degree, no matter payload size, gain is reduced to 0.
Circuit provided by the invention is applied in vehicle-mounted charge field, the shown circuit connection using such as Fig. 2.Wherein input
Voltage is set as 390V, and resonance frequency is set as 100kHz, and output voltage range is set as [100V, 420V], T1With T2Transformer voltage ratio is set
It is set to 13: 14.Here only with phase shifting control, when phase shifting angle is 0, normalized gain 1, output voltage be maximum value=
390*1*14/13=420V.Increase phase shifting angle, voltage output reduces, until being reduced to 100V.
Claims (6)
1. a kind of resonance isolated converter of ultra-wide range of regulation, which is characterized in that humorous including the half-bridge LLC with transformer one
Vibrating network one and half-bridge logical link control (LLC) resonant network two with transformer two, the secondary side of transformer one are half-bridge logical link control (LLC) resonant network one
Output end, the secondary side of transformer two are the output end of half-bridge logical link control (LLC) resonant network two, and input voltage inputs half-bridge logical link control (LLC) resonant simultaneously
Network one and half-bridge logical link control (LLC) resonant network two, the output of the output end and half-bridge logical link control (LLC) resonant network two of half-bridge logical link control (LLC) resonant network one
It is loaded after the series connection of end through being connected by current rectifying and wave filtering circuit.
2. a kind of resonance isolated converter of ultra-wide range of regulation as described in claim 1, which is characterized in that the rectification filter
Wave circuit includes sequentially connected rectification circuit and filter circuit, rectification circuit and the half-bridge logical link control (LLC) resonant network one and described
The output end of half-bridge logical link control (LLC) resonant network two is connected, and filter circuit connects the load.
3. a kind of resonance isolated converter of ultra-wide range of regulation as described in claim 1, which is characterized in that the half-bridge
LLC resonant network one is identical as the circuit structure of the half-bridge logical link control (LLC) resonant network two.
4. a kind of resonance isolated converter of ultra-wide range of regulation as claimed in claim 3, which is characterized in that the half-bridge
LLC resonant network one or the half-bridge logical link control (LLC) resonant network two include switch one and switch two, one end shape of switch one and switch two
At the half-bridge logical link control (LLC) resonant network one or the input terminal of the half-bridge logical link control (LLC) resonant network two, the other end and switch two of switch one
The other end be connected after connect inductance one end, inductance the other end connection transformer one or transformer two primary side one end,
One end of the other end connection capacitor of the primary side of transformer one or transformer two, one end phase of the other end and switch two of capacitor
Even, also bridging has magnetizing inductance between the both ends of the primary side of transformer one or transformer two.
5. a kind of resonance isolated converter of ultra-wide range of regulation as described in claim 1, which is characterized in that the rectified current
Road uses diode rectifier bridge.
6. a kind of resonance isolated converter of ultra-wide range of regulation as described in claim 1, which is characterized in that the filtered electrical
Road uses capacitive filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810727323.9A CN108900090B (en) | 2018-07-04 | 2018-07-04 | Resonant isolation converter with ultra-wide voltage regulation range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810727323.9A CN108900090B (en) | 2018-07-04 | 2018-07-04 | Resonant isolation converter with ultra-wide voltage regulation range |
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| Publication Number | Publication Date |
|---|---|
| CN108900090A true CN108900090A (en) | 2018-11-27 |
| CN108900090B CN108900090B (en) | 2020-09-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861543A (en) * | 2019-01-28 | 2019-06-07 | 浙江大学 | A kind of wide crisscross parallel type LCLC controlled resonant converter for loading wide gain |
| CN111726010A (en) * | 2020-07-07 | 2020-09-29 | 科华恒盛股份有限公司 | Three-phase LLC circuit DC gain control method and device |
| CN114244157A (en) * | 2021-12-18 | 2022-03-25 | 北京动力源科技股份有限公司 | Staggered high-power large-current isolation DC-DC circuit |
| CN116260344A (en) * | 2023-05-15 | 2023-06-13 | 西安图为电气技术有限公司 | Multiphase resonant circuit and power supply device |
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| JP2005524375A (en) * | 2002-04-23 | 2005-08-11 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | LLC half-bridge converter |
| US20120262955A1 (en) * | 2009-02-27 | 2012-10-18 | Delta Electronics (Shanghai) Co., Ltd. | Converter with input voltage balance circuit |
| CN103780092A (en) * | 2012-10-26 | 2014-05-07 | 上海边光自动化科技有限公司 | Wide voltage output LED driving power supply circuit |
| CN106972752A (en) * | 2017-05-08 | 2017-07-21 | 深圳陆巡科技有限公司 | Can wide scope regulation output DC DC converters |
| CN108233720A (en) * | 2018-03-13 | 2018-06-29 | 厦门大学 | Fault tolerant operation full-bridge LLC resonant converter based on half bridge redundancy |
-
2018
- 2018-07-04 CN CN201810727323.9A patent/CN108900090B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005524375A (en) * | 2002-04-23 | 2005-08-11 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | LLC half-bridge converter |
| US20120262955A1 (en) * | 2009-02-27 | 2012-10-18 | Delta Electronics (Shanghai) Co., Ltd. | Converter with input voltage balance circuit |
| CN103780092A (en) * | 2012-10-26 | 2014-05-07 | 上海边光自动化科技有限公司 | Wide voltage output LED driving power supply circuit |
| CN106972752A (en) * | 2017-05-08 | 2017-07-21 | 深圳陆巡科技有限公司 | Can wide scope regulation output DC DC converters |
| CN108233720A (en) * | 2018-03-13 | 2018-06-29 | 厦门大学 | Fault tolerant operation full-bridge LLC resonant converter based on half bridge redundancy |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861543A (en) * | 2019-01-28 | 2019-06-07 | 浙江大学 | A kind of wide crisscross parallel type LCLC controlled resonant converter for loading wide gain |
| CN111726010A (en) * | 2020-07-07 | 2020-09-29 | 科华恒盛股份有限公司 | Three-phase LLC circuit DC gain control method and device |
| CN111726010B (en) * | 2020-07-07 | 2021-08-10 | 漳州科华电气技术有限公司 | Three-phase LLC circuit DC gain control method and device |
| CN114244157A (en) * | 2021-12-18 | 2022-03-25 | 北京动力源科技股份有限公司 | Staggered high-power large-current isolation DC-DC circuit |
| CN116260344A (en) * | 2023-05-15 | 2023-06-13 | 西安图为电气技术有限公司 | Multiphase resonant circuit and power supply device |
| CN116260344B (en) * | 2023-05-15 | 2024-03-08 | 西安图为电气技术有限公司 | Multiphase resonant circuit and power supply device |
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| Publication number | Publication date |
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| CN108900090B (en) | 2020-09-29 |
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