CN106341049A - Output high voltage LLC resonant converter - Google Patents
Output high voltage LLC resonant converter Download PDFInfo
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- CN106341049A CN106341049A CN201610955525.XA CN201610955525A CN106341049A CN 106341049 A CN106341049 A CN 106341049A CN 201610955525 A CN201610955525 A CN 201610955525A CN 106341049 A CN106341049 A CN 106341049A
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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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
The invention discloses an output high voltage LLC resonant converter which comprises a switch network, a resonant cavity circuit, a rectification circuit and a filter circuit, wherein the switch network is connected with the two ends of an input voltage, and the two ends of the filter circuit are connected with a load. When the resonant converter works in a relatively high working frequency and the output working voltage is higher than 600V, primary sides of transformers of the resonant cavity circuit are connected in parallel, secondary sides of the transformers are connected to two rectifier bridge circuits, and the rectifier bridge circuits are connected in series. The problem in the voltage stress of an output diode is solved, the power density of a product is improved, and the product cost is reduced.
Description
Technical field
The present invention relates to electric and electronic technical field, more particularly to a kind of output high pressure llc controlled resonant converter.
Background technology
Motorized is the inexorable trend of automobile future development, and charging pile is the essential condition of electric automobile popularization.Electricity
Electrical automobile course continuation mileage is the key factor limiting its development, based on current lithium battery technology, improves the simple side of course continuation mileage
Method is the series voltage improving constantly electric automobile lithium battery, according to GB: " gb/t 18487.1-2015 electric automobile passes
Lead charging system part 1: General Requirement " in 4.4 require DC charging voltage highest 950v.Charging module is charging pile core
Center portion part, major function is to convert alternating current to the isolated DC electricity of electric automobile lithium battery needs.Through years development, fill
The high efficiency of electric module, high power density become industry main flow.Because llc process resonance converter topology is operated in higher opening
Close and still possess very high conversion efficiency under frequency condition, it has also become the first-selected topology of charging module DC converter.
Direct current llc controlled resonant converter operation principle block diagram is as shown in Figure 1, comprising: switching network, cavity resonator circuit, rectification
Circuit, filter circuit and load ro.Wherein: switching network can be asymmetry half-bridge circuit, symmetrical half bridge circuit, full-bridge electricity
Road, tri-level half-bridge circuit, three Level Full Bridge circuit etc..
Fig. 2 is asymmetrical half-bridge llc controlled resonant converter, and transformator t1 and diode d1, d2, d3, d4 constitute full-bridge rectification
Circuit.This topology, when VD is higher than 600v, can only use the diode of more than 600v, due to the two of more than 600v
Pole pipe is all not so good as the diode of below 600v in price and performance so that product cost declines, and does not have competitiveness.
Content of the invention
The invention provides a kind of output high pressure llc controlled resonant converter, comprising: switching network, cavity resonator circuit, rectification
Circuit and filter circuit four part, wherein, switching network connects the two ends of input voltage, and the two ends of filter circuit connect to be born
Carry.
Wherein, cavity resonator circuit includes resonant inductance, magnetizing inductance and the resonant capacitance being connected in series；Rectification circuit bag
Include the first full bridge rectifier and the second full bridge rectifier, the first full bridge rectifier include the first transformator, the one or two
Pole pipe, the second diode, the 3rd diode and the 4th diode；Wherein first diode, the second diode, the 3rd diode
And the 4th diode both positive and negative polarity be sequentially connected in series；One end of the former limit of the first transformator be connected to resonant inductance and magnetizing inductance it
Between, the other end be connected between magnetizing inductance and resonant capacitance, one end of the first transformer secondary connect to the first diode with
Between second diode, the other end of the first transformer secondary connects between the 3rd diode and the 4th diode；
Second full bridge rectifier includes the second transformator, the 5th diode, the 6th diode, the 7th diode and
Eight diodes；Wherein the 5th diode, the 6th diode, the 7th diode and the 8th diode both positive and negative polarity are sequentially connected in series；The
One end of the former limit of two transformators is connected between resonant inductance and magnetizing inductance, the other end is connected to magnetizing inductance and resonance electricity
Between appearance, one end of the second transformer secondary connect between the 5th diode and the 6th diode, the second transformer secondary
The other end connects between the 7th diode and the 8th diode.
Further, the first full bridge rectifier also includes the 3rd transformator, the 3rd transformator and the first transformer primary side
Windings in series, vice-side winding are in parallel；Second full bridge rectifier also includes the 4th transformator, the 4th transformator and the second transformator
Primary side winding series connection, vice-side winding are in parallel.
Brief description
Fig. 1 is direct current llc controlled resonant converter operation principle block diagram.
Fig. 2 is the circuit diagram of asymmetrical half-bridge llc controlled resonant converter.
Fig. 3 is output high pressure llc controlled resonant converter circuit diagram proposed by the present invention.
Fig. 4 is the circuit diagram of asymmetrical half-bridge llc controlled resonant converter proposed by the present invention；
Fig. 5 is the circuit diagram of symmetrical half bridge llc controlled resonant converter proposed by the present invention；
Fig. 6 is the circuit diagram of full-bridge llc controlled resonant converter proposed by the present invention；
Fig. 7 is the circuit diagram of three level symmetrical half bridge llc controlled resonant converters proposed by the present invention；
Fig. 8 is the circuit diagram of three Level Full Bridge llc controlled resonant converters proposed by the present invention；
Fig. 9 is the full-bridge crisscross parallel llc resonance circuit figure being proposed based on Fig. 3 connected mode.
Figure 10 is the resonance circuit figure of the three full-bridge rectification series connection of output based on the extension of Fig. 3 connected mode.
Figure 11 is the output high pressure llc resonance circuit figure increasing transformator based on Fig. 3 connected mode.
Figure 12 is the circuit diagram of the full-bridge llc controlled resonant converter based on Figure 11 connected mode；
Figure 13 is the circuit diagram of the three level symmetrical half bridge llc controlled resonant converters based on Figure 11 connected mode；
Figure 14 is the circuit diagram of the three Level Full Bridge llc controlled resonant converters based on Figure 11 connected mode；
Figure 15 is the circuit diagram of the staggered llc controlled resonant converter of full-bridge based on Figure 11 connected mode；
Figure 16 is the circuit diagram of another the similar connected mode being Figure 11.
Figure 17 is the circuit diagram of the full-bridge llc controlled resonant converter based on Figure 16 connected mode；
Figure 18 is the circuit diagram of the staggered llc controlled resonant converter of full-bridge based on Figure 16 connected mode；
Figure 19 is the circuit diagram of mixing application full-bridge llc controlled resonant converter.
Figure 20 is full-bridge llc controlled resonant converter circuit operating diagram.
Figure 21 is the simulation waveform of Figure 20.
Specific embodiment
The present invention is further illustrated with specific embodiment below in conjunction with the accompanying drawings.The present invention proposes a kind of new output
High pressure llc controlled resonant converter, as shown in figure 3, comprising: switching network, cavity resonator circuit, rectification circuit and filter circuit four
Part, wherein, switching network connects the two ends of input voltage, and the two ends of filter circuit connect load.Special feature of the present invention exists
In the connected mode of cavity resonator circuit and rectification circuit, wherein: lr1, lm1 and cr1 collectively constitute three passes of llc controlled resonant converter
The resonant element of key, lr1 is resonant inductance, lm1 be magnetizing inductance (lm1 can be independent inductance element it is also possible to t1 and t2
Carry out magnetic integrated), cr1 is resonant capacitance；T1 and t2 is transformator；D1, d2, d3, d4, d5, d6, d7, d8 are secondary rectification two
Pole pipe.Transformator t1 and diode d1, d2, d3, d4 form full-bridge rectification, and transformator t2 is formed with diode d5, d6, d7, d8
Full-bridge rectification.The full-bridge that the full-bridge of d1, d2, d3, d4 composition is formed with d5, d6, d7, d8 is connected.The advantage of this scheme is:
The full-bridge that the full-bridge of d1, d2, d3, d4 composition is formed with d5, d6, d7, d8 is connected and is solved output high-voltage problem, two other transformation
Device power-sharing, radiating also can be more preferable.
Input vin+ and vin- of Fig. 3 is switching network, and switching network can be made up of following circuit: asymmetrical half-bridge electricity
Road, symmetrical half bridge circuit, full-bridge circuit, three level symmetrical half bridge circuit, three Level Full Bridge circuit etc..The output vo+ of Fig. 3 and
Vo- connects filter circuit, and filter circuit can be electric capacity or other circuit, and filter circuit rear end connects load.
Specific embodiments based on Fig. 3 are as follows:
Fig. 4 is asymmetrical half-bridge llc controlled resonant converter embodiment；
Fig. 5 is symmetrical half bridge llc controlled resonant converter embodiment；
Fig. 6 is full-bridge llc controlled resonant converter embodiment；
Fig. 7 is three level symmetrical half bridge llc controlled resonant converter embodiments；
Fig. 8 is three Level Full Bridge llc controlled resonant converter embodiments；
In addition to Fig. 4-8 embodiment, other use the embodiment of Fig. 3 connected mode also in this patent protection domain.
Here especially set out is to release brand-new full-bridge crisscross parallel llc resonance circuit based on Fig. 3 connected mode, specifically
Embodiment is as shown in Figure 9.
Fig. 9 scheme outstanding advantages are: two full-bridge inputs are connected respectively to two electricity being connected on input voltage source u i n
Hold c1 and c2 both sides, two such full-bridge is connected in input side；Outlet side d1, d2, d3, d4 composition full-bridge rectification and d5,
D6, d7, d8 composition full-bridge rectification series connection after, then with d9, d10, d11, d12 composition full-bridge rectification and d13, d14, d15,
The full-bridge rectification crisscross parallel of d16 composition；Switching tube s1, s2, s3, s4 and s5, s6, s7, s8 drive waveforms respectively interlock 90
Degree；By crisscross parallel, the ripple voltage in output capacitance co and ripple current can be greatly reduced, and then reduce inverter body
Long-pending, improve power density.
If transformator t1 and t2 can not meet high power requirements in Fig. 3, new connection side can be released on the basis of Fig. 3
Case Figure 11, also in this patent protection domain, newly increases transformator t3 and the series connection of original t1 primary side winding, vice-side winding is in parallel.
Equally newly increase transformator t4 and the series connection of original t2 primary side winding, vice-side winding is in parallel.
Figure 10 is the resonance circuit figure of the three full-bridge rectification series connection of output based on the extension of Fig. 3 connected mode.lr1、lm1、
Cr1, t1, t2, t3 form cavity resonator circuit, and wherein transformator t1, t2, t3 is in parallel with lm1；The full-bridge of d1, d2, d3, d4 composition
With d5, d6, d7, d8 composition full-bridge connect, then with d9, d10, d11, d12 form full-bridge connect after collectively constitute rectified current
Road.If necessary to higher output voltage, transformator can be expanded to more than 3 or more in the way of with similar Fig. 3 and Figure 10
Many, export rectifier bridge also respective extension to more than 3 or more, also in this patent protection domain.
Figure 11 is simply transformator t1 and t4 to be expanded to two transformator t1, t3 and t2, t4 respectively, certainly by transformator
T1 and t4 be extended to 3 respectively or more also in this patent protection domain.
Input vin+ and vin- of Figure 11 can be asymmetry half-bridge circuit, symmetrical half bridge circuit, full-bridge circuit, three level
Symmetrical half bridge circuit, three Level Full Bridge circuit etc..Output vo+ and vo- of Figure 11 can connect electric capacity and load.Based on Figure 11's
Specific embodiments are as follows:
Figure 12 is the full-bridge llc controlled resonant converter embodiment based on Figure 11 connected mode；
Figure 13 is the three level symmetrical half bridge llc controlled resonant converter embodiments based on Figure 11 connected mode；
Figure 14 is the three Level Full Bridge llc controlled resonant converter embodiments based on Figure 11 connected mode；
Figure 15 is the staggered llc controlled resonant converter embodiment of full-bridge based on Figure 11 connected mode；Enforcement except Figure 12-16
Outside scheme, other use the embodiment of Figure 11 connected mode also in this patent protection domain.
Figure 16 is another similar connected mode of Figure 11, is also this patent protection domain.Figure 16 is transformator t1
With the series connection of t3 former limit, t1 secondary connection full-bridge rectification d1, d2, d3, d4, t3 secondary connects full-bridge rectification d9, d10, d11, d12,
Full-bridge rectification d1, d2, d3, d4 and full-bridge rectification d9, d10, d11, d12 are in parallel, t2 and t4 be with diode d5, d6, d7, d8 and
D13, d14, d15, d16 are also same connected mode.
Input vin+ and vin- of Figure 16 can be asymmetry half-bridge circuit, symmetrical half bridge circuit, full-bridge circuit, three level
Symmetrical half bridge circuit, three Level Full Bridge circuit etc..Output vo+ and vo- of Figure 16 can connect electric capacity and load.Based on Figure 16's
Specific embodiments are as follows:
Figure 17 is the full-bridge llc controlled resonant converter embodiment based on Figure 16 connected mode；
Figure 18 is the staggered llc controlled resonant converter embodiment of full-bridge based on Figure 16 connected mode；Except Figure 17 and 18 enforcement
Outside scheme, other use the embodiment of Figure 16 connected mode also in this patent protection domain.
Two kinds of connected modes of Figure 11 and Figure 16 are carried out mixing application also in this patent protection domain.Figure 19 is new mixed
Close application full-bridge llc controlled resonant converter embodiment.
Here, introduce operation principle of the present invention: s1, s2, s3, s4 group is helped taking Figure 20 full-bridge llc controlled resonant converter as a example
Bridge switch network；Lr1, lm1, cr1, t1, t2 form cavity resonator circuit；The full-bridge of d1, d2, d3, d4 composition and d5, d6, d7, d8
The full-bridge series connection of composition, collectively constitutes rectification circuit；Co is filter circuit；Ro is load.
Figure 21 is the simulation waveform of Figure 20, and simulation parameter design is as follows: input uin is 400vdc；Electric capacity c1 is 810uf；
Resonant inductance lr1 is 16uh；Magnetizing inductance lm1 is 60uh；Resonant capacitance cr1 is 72nf；Transformator t1 with t2 is identical, and no-load voltage ratio is all
It is 32:38；Electric capacity co is 250uf；Load ro is 75 ohm.
In Figure 21: g1, g2, g3, g4 are the drive waveforms of switching tube s1, s2, s3, s4 respectively；Ilr1 is resonant inductance lr1
Current waveform；Ilm1 is the current waveform of magnetizing inductance lm1；Vo is the voltage waveform at load ro two ends；vd1、vd4、vd5、
Vd8 is the voltage waveform at commutation diode d1, d4, d5, d8 two ends respectively.Seen by simulation result, when output voltage is left for 942v
The right side is, can divide equally output voltage vo during diode d1 (voltage waveform vd1) and diode d5 (voltage waveform vd5) work, two
Also divide equally output voltage vo when pole pipe d4 (voltage waveform vd4) and diode d8 (voltage waveform vd8) work, so export two poles
Pipe d1, d2, d3, d4, d5, d6, d7, d8 can be with the Ultrafast recovery diodes using below 600v.
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to the present invention
Restriction.Those skilled in the art, without departing from the spirit of the invention, can make any modification to the present invention, and this
Bright protection domain is limited to the appended claims.
Claims (5)
1. a kind of output high pressure llc controlled resonant converter, described resonance transformer includes switching network, cavity resonator circuit, rectified current
Road and filter circuit four part, wherein, switching network connects the two ends of input voltage, and the two ends of filter circuit connect load；
It is characterized in that:
Wherein, cavity resonator circuit includes resonant inductance, magnetizing inductance and the resonant capacitance being connected in series；Rectification circuit includes
One full bridge rectifier and the second full bridge rectifier, the first full bridge rectifier include the first transformator, the first diode,
Second diode, the 3rd diode and the 4th diode；Wherein first diode, the second diode, the 3rd diode and
4th diode both positive and negative polarity is sequentially connected in series；One end of the former limit of the first transformator is connected between resonant inductance and magnetizing inductance,
The other end is connected between magnetizing inductance and resonant capacitance, and one end of the first transformer secondary connects to the first diode and second
Between diode, the other end of the first transformer secondary connects between the 3rd diode and the 4th diode；
Second full bridge rectifier includes the second transformator, the 5th diode, the 6th diode, the 7th diode and the eight or two
Pole pipe；Wherein the 5th diode, the 6th diode, the 7th diode and the 8th diode both positive and negative polarity are sequentially connected in series；Second change
One end of the former limit of depressor is connected between resonant inductance and magnetizing inductance, the other end is connected to magnetizing inductance and resonant capacitance it
Between, one end of the second transformer secondary connect between the 5th diode and the 6th diode, the second transformer secondary another
End connects between the 7th diode and the 8th diode.
2. according to claim 1 output high pressure llc controlled resonant converter it is characterised in that:
Further, the first full bridge rectifier also includes the 3rd transformator, the 3rd transformator and the first transformer primary side winding
Series connection, vice-side winding are in parallel；Second full bridge rectifier also includes the 4th transformator, the 4th transformator and the second transformer primary side
Windings in series, vice-side winding are in parallel.
3. output high pressure llc controlled resonant converter according to claim 1 it is characterised in that: wherein switching network includes the
One transistor, transistor seconds, third transistor, the 4th transistor and the first electric capacity；Wherein, the first electric capacity, be connected in series
The first transistor and transistor seconds and be connected in series third transistor and the 4th coupled in parallel is connected to input voltage
Two ends.
4. according to claim 1 output high pressure llc controlled resonant converter it is characterised in that:
Further, wherein switching network can be asymmetry half-bridge circuit, symmetrical half bridge circuit, full-bridge circuit, three level pair
Claim half-bridge circuit, three Level Full Bridge circuit etc..
5. according to claim 1 output high pressure llc controlled resonant converter it is characterised in that:
Wherein filter circuit is output capacitor, and this output capacitor is in parallel with output loading.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610955525.XA CN106341049A (en) | 2016-10-27 | 2016-10-27 | Output high voltage LLC resonant converter |
| PCT/CN2017/107984 WO2018077230A1 (en) | 2016-10-27 | 2017-10-27 | Llc resonant converter having high-voltage output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610955525.XA CN106341049A (en) | 2016-10-27 | 2016-10-27 | Output high voltage LLC resonant converter |
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| CN106341049A true CN106341049A (en) | 2017-01-18 |
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| CN201610955525.XA Pending CN106341049A (en) | 2016-10-27 | 2016-10-27 | Output high voltage LLC resonant converter |
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| WO (1) | WO2018077230A1 (en) |
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| WO2018077230A1 (en) * | 2016-10-27 | 2018-05-03 | 深圳市优优绿能电气有限公司 | Llc resonant converter having high-voltage output |
| JP2019030219A (en) * | 2017-08-03 | 2019-02-21 | デルタ エレクトロニクス インコーポレイティド | Power supply conversion device |
| CN109412416A (en) * | 2017-08-15 | 2019-03-01 | 深圳市优优绿能电气有限公司 | A kind of power inverter of multi-channel parallel input and multiple series series output |
| CN109412416B (en) * | 2017-08-15 | 2024-08-20 | 深圳市优优绿能股份有限公司 | Power converter with multiple parallel inputs and multiple serial outputs |
| CN109672340A (en) * | 2017-10-17 | 2019-04-23 | 深圳市优优绿能电气有限公司 | A kind of Multi-input parallel and the power inverter of multiple-channel output parallel connection |
| CN107769577A (en) * | 2017-12-07 | 2018-03-06 | 成都爱特联科技有限公司 | DC/DC translation circuits with protection control function |
| EP3675340B1 (en) * | 2018-12-19 | 2024-02-14 | Delta Electronics, Inc. | Llc resonant converter system |
| CN110138242A (en) * | 2019-05-23 | 2019-08-16 | 北京动力源科技股份有限公司 | A kind of series rectifier topological structure and a kind of LLC resonance circuit |
| CN111817571A (en) * | 2020-07-17 | 2020-10-23 | 广州华立科技职业学院 | Medium and high frequency ion nitriding heat treatment pulse power supply and its control system |
| WO2022142278A1 (en) * | 2020-12-30 | 2022-07-07 | 深圳市优优绿能电气有限公司 | Ultra-wide-range high-power converter circuit |
| CN113938024A (en) * | 2021-11-18 | 2022-01-14 | 陕西科技大学 | A PWM Controlled Series Resonant Converter and Method for Electric Vehicle Charger |
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