CN110391748A - A kind of single channel dual transformer resonance DC converter - Google Patents
A kind of single channel dual transformer resonance DC converter Download PDFInfo
- Publication number
- CN110391748A CN110391748A CN201810326956.9A CN201810326956A CN110391748A CN 110391748 A CN110391748 A CN 110391748A CN 201810326956 A CN201810326956 A CN 201810326956A CN 110391748 A CN110391748 A CN 110391748A
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- Prior art keywords
- transformer
- terminal
- switch
- resonance
- end winding
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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
- H02M7/4818—Resonant converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuits
-
- 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
Abstract
The present invention provides a kind of single channel dual transformer resonance DC converter, including direct-current input power supplying, input filter capacitor, square-wave generator, resonance circuit, transformer TX1 and transformer TX2, rectification circuit, output filter capacitor；The input capacitance is connected in parallel to the direct-current input power supplying both ends, and the square-wave generator is connected in parallel to the input filter capacitor both ends；The output end of square-wave generator is connected to resonance circuit, and for input dc power to be changed into alternating current, resonance circuit is connected to transformer TX1 and transformer TX2, the transformer TX1 and transformer TX2 respectively include a former end winding, at least one secondary end winding；Resonant inductance and magnetizing inductance can be further integrated into transformer by the present invention, this can be realized by changing winding construction design.This design saves space to the greatest extent, and very high power density may be implemented in product.The number of switches of original end of the invention square-wave generator is few, saves space, cost, and transformer pair end current density is low, reduces and fans hot cost, and product efficiency is high.
Description
Technical field
The battery charging of new-energy automobile (electric vehicle mixes motor-car) and power electronic equipment power supply
Background technique
The vehicle-mounted DC/DC of new-energy automobile takes electricity from high-tension battery, exports 14v voltage, for charging to lead-acid battery, and
It powers to vehicle electronic device.Traditional hard switching DC/DC (topologys such as hard switching half-bridge, full-bridge, pushpull) is due to power
Switching loss is big, it is difficult to accomplish high efficiency.It can reduce switching loss using series resonance-type DC/DC (Fig. 1), but due to defeated
Electric current is big out, for power needed for vehicular applications, appoints and so needs to use multi-channel parallel to improve fan-out capability, such as application number
It is that output energy is improved by the way of multi-channel parallel for 201110373328.4 and 01320590941.6 Chinese patent
Power, it inevitably will increase product size and cost in this way, and reduce power density, there is an urgent need to be improved.
Summary of the invention
To solve the above problems, the present invention provides a kind of single channel dual transformer resonance DC converters.
To realize the technical purpose, the technical scheme is that a kind of single channel dual transformer resonance DC converter,
It include: direct-current input power supplying, input filter capacitor, square-wave generator, resonance circuit, transformer TX1 and transformer TX2, rectification
Circuit and output filter capacitor；
The input capacitance is connected in parallel to the direct-current input power supplying both ends, and the square-wave generator is connected in parallel to the input filter
Wave capacitor both ends；
In the output end connection setting resonance circuit of square-wave generator, for being alternating current by direct-current input power supplying resonance
Source, resonance circuit connection setting transformer TX1 and transformer TX2, the transformer TX1 and transformer TX2 respectively include one
Former end winding, at least two secondary end windings；
The pair end winding connection finishing circuit and output filter capacitor C3, are converted into for the voltage after exporting transformation
DC power supply.
Further, the square-wave generator is one kind of half-bridge or full bridge structure, and half-bridge includes that two switch head and the tail are connected,
Full-bridge is by two half-bridge parallel connections.
Further, the switch in full-bridge or half-bridge described above can be MOSFET or IGBT parallel connection freewheeling diode.
Further,
The resonance circuit includes magnetizing inductance L1 and magnetizing inductance L2, resonant inductance L3 and a resonant capacitance C2；
Or, the resonance circuit includes resonant inductance L4 and resonant capacitance C2；
Or, the resonance circuit only includes resonant capacitance C2.
Further, the resonance circuit includes magnetizing inductance L1 and magnetizing inductance L2, resonant inductance L3 and a resonance electricity
Hold C2；
The first terminal of the magnetizing inductance L1 is connected to the former end winding first terminal of the transformer TX1, described to encourage
Magnetoelectricity sense L1 Second terminal is connected to transformer TX1 original end winding Second terminal；
The first terminal of the magnetizing inductance L2 is connected to the former end winding first terminal of the transformer TX2, described to encourage
Magnetoelectricity sense L2 Second terminal is connected to transformer TX2 original end winding Second terminal.
Further, the resonant inductance L3 first terminal is connected with square-wave generator output first terminal, described humorous
It shakes inductance L3 and resonant capacitance C2 series connection, the resonant capacitance C2 Second terminal and transformer TX1 original end winding the
One terminal is connected.
Further, the rectification circuit includes the first rectification circuit (including first switch and the second switch) and the second rectification
Circuit (includes third switch and the 4th switch), and the first terminal of the transformer TX1 and transformer TX2 pair end winding connects respectively
It is connected to the first terminal of first switch and third switch；The transformer TX1 is connected with transformer TX2 pair end winding Second terminal
To output filter capacitor C3 first terminal described above；The transformer TX1 and transformer TX2 pair end winding third terminal difference
It is connected to the first terminal of second switch and the 4th switch；First switch, second switch, third switch and the 4th switch are respective
Second terminal is connected with output capacitance C3 Second terminal described above.
The beneficial effects of the present invention are:
The present invention keeps the number of switches of former end square-wave generator few using single path converter structure, saves space, cost；It is double
Transformer reduces current density, reduces heat dissipation cost, product power density is high, high-efficient.And it by resonant inductance and can encourage
Magnetoelectricity sense is further integrated into transformer, improves power density.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the embodiment of the present invention 1；
Fig. 2 is the electrical block diagram of the embodiment of the present invention 2；
Fig. 3 is the electrical block diagram of the embodiment of the present invention 3.
Specific embodiment
Technical solution of the present invention will be clearly and completely described below.
A kind of single channel dual transformer resonance DC converter, comprising: direct-current input power supplying, input filter capacitor, square wave hair
Raw device, resonance circuit, transformer TX1 and transformer TX2, rectification circuit, output filter capacitor；
The input capacitance is connected in parallel to the direct-current input power supplying both ends, and the square-wave generator is connected in parallel to the input filter
Wave capacitor both ends；
In the output end connection setting resonance circuit of square-wave generator, for being alternating current by direct-current input power supplying resonance
Source, resonance circuit connection setting transformer TX1 and transformer TX2, the transformer TX1 and transformer TX2 respectively include one
Former end winding, at least two secondary end windings；
The pair end winding connection rectification circuit and output filter capacitor C3, are converted into for the voltage after exporting transformation
DC power supply.
Embodiment 1:
As shown in Figure 1, square-wave generator is made of Q1, Q2, Q3, Q4, Q1 and Q2 constitute bridge arm 1, and Q3 and Q4 constitute bridge arm
2.Two bridge arm switching frequencies are identical, lower switch alternate conduction on each bridge arm, and turn-on time is identical.Between two bridge arms, Q1
It is simultaneously turned on Q4, Q2 and Q3 are simultaneously turned on.Input filter capacitor C1 filters out voltage ripple caused by switch.Resonant inductance L1,
Magnetizing inductance L2, L3, resonant capacitance C2 play filter action, and square wave high frequency components are decayed.Transformer TX1 and TX2 is by L1
Secondary end winding is output to after converting with L2 voltage according to the turn ratio.The alternating voltage of the secondary end winding output of two transformers passes through Q5,
After Q6, Q7, Q8 rectification, DC voltage is exported, output capacitance C2 filters out high frequency noise.
Due to the inconsistency of device, two transformer outputs can be different to input gain, causes electric current different.If
Count that resonance is padded, transformer and need to there are surpluses when rectifier.But the present invention has passive stream adjustment effect, can be effective
Two transformers of inhibition current difference.Equal stream mechanism is as described below: in the dynamic case, it is assumed that an external disturbance makes
Become larger when transformer 1 exports electric current, then 1 input current of transformer increases, so that 1 input voltage of transformer declines, forces transformation
2 input voltage of device increases, and causes transformer 2 to export electric current and increases.
Further, the square-wave generator is one kind of half-bridge or full bridge structure, and half-bridge includes that two switch head and the tail are connected,
Full-bridge is by two half-bridge parallel connections.
Further, the switch in full-bridge or half-bridge described above can be MOSFET or IGBT parallel connection freewheeling diode.
Further,
The resonance circuit includes magnetizing inductance L1 and magnetizing inductance L2, resonant inductance L3 and a resonant capacitance C2；
The first terminal of the magnetizing inductance L1 is connected to the former end winding first terminal of the transformer TX1, described to encourage
Magnetoelectricity sense L1 Second terminal is connected to transformer TX1 original end winding Second terminal；
The first terminal of the magnetizing inductance L2 is connected to the former end winding first terminal of the transformer TX2, described to encourage
Magnetoelectricity sense L2 Second terminal is connected to transformer TX2 original end winding Second terminal.
Further, the resonant inductance L3 first terminal is connected with square-wave generator output first terminal, described humorous
It shakes inductance L3 and resonant capacitance C2 series connection, the resonant capacitance C2 Second terminal and transformer TX1 original end winding the
One terminal is connected.
Further, the rectification circuit includes the first rectification circuit (including first switch and the second switch) and the second rectification
Circuit (includes third switch and the 4th switch), and the first terminal of the transformer TX1 and transformer TX2 pair end winding connects respectively
It is connected to the first terminal of first switch and third switch；The transformer TX1 is connected with transformer TX2 pair end winding Second terminal
To output filter capacitor C3 first terminal described above；The transformer TX1 and transformer TX2 pair end winding third terminal difference
It is connected to the first terminal of second switch and the 4th switch；First switch, second switch, third switch and the 4th switch are respective
Second terminal is connected with output capacitance C3 Second terminal described above.
Embodiment 2:
As shown in Fig. 2, the resonance circuit includes resonant inductance L4 and resonant capacitance C2；Two magnetizing inductances L1 and L2 are not
Individualism, but be integrated into design of transformer.This can be realized by adjusting transformer air gap.Resonance electricity
Right individualism is appointed in sense.Design can be relatively flexible in this way, can be relatively easy to adjusting inductance value.
Embodiment 3:
As shown in figure 3, the resonance circuit only includes resonant capacitance C2.Design in Fig. 3 further collects resonant inductance
At into transformer.This can be realized by changing winding construction design.This design saves space, product to the greatest extent
Very high power density may be implemented.But design difficulty is bigger, and it is not high that product modifies flexibility.
For those of ordinary skill in the art, without departing from the concept of the premise of the invention, it can also do
Several modifications and improvements out, these are all within the scope of protection of the present invention.
Claims (7)
1. a kind of single channel dual transformer resonance DC converter characterized by comprising direct-current input power supplying, input filter electricity
Appearance, square-wave generator, resonance circuit, transformer TX1 and transformer TX2, rectification circuit and output filter capacitor；
The input capacitance is connected in parallel to the direct-current input power supplying both ends, and the square-wave generator is connected in parallel to the input filter electricity
Hold both ends；
In the output end connection setting resonance circuit of square-wave generator, for input dc power to be changed into alternating current, resonance electricity
Road is connected to transformer TX1 and transformer TX2, the transformer TX1 and transformer TX2 respectively include a former end winding, until
Few two secondary ends winding；
The pair end winding connection rectification circuit and output filter capacitor C3, are converted into direct current for the voltage after exporting transformation
Power supply.
2. a kind of single channel dual transformer resonance DC converter according to claim 1, which is characterized in that the square wave hair
Raw device is one kind of half-bridge or full bridge structure, and half-bridge includes that two switch head and the tail are connected, and full-bridge is by two half-bridge parallel connections.
3. a kind of single channel dual transformer resonance DC converter according to claim 2, which is characterized in that described above complete
Switch in bridge or half-bridge can be MOSFET or IGBT parallel connection freewheeling diode.
4. a kind of single channel dual transformer resonance DC converter according to claim 1, which is characterized in that
The resonance circuit includes magnetizing inductance L1 and magnetizing inductance L2, resonant inductance L3 and a resonant capacitance C2；
Or, the resonance circuit includes resonant inductance L4 and resonant capacitance C2；
Or, the resonance circuit includes resonant capacitance C2.
5. a kind of single channel dual transformer resonance DC converter according to claim 4, which is characterized in that the resonance electricity
Road includes magnetizing inductance L1 and magnetizing inductance L2, resonant inductance L3 and a resonant capacitance C2；
The first terminal of the magnetizing inductance L1 is connected to the former end winding first terminal of the transformer TX1, the excitation electricity
Sense L1 Second terminal is connected to transformer TX1 original end winding Second terminal；
The first terminal of the magnetizing inductance L2 is connected to the former end winding first terminal of the transformer TX2, the excitation electricity
Sense L2 Second terminal is connected to transformer TX2 original end winding Second terminal.
6. a kind of single channel dual transformer resonance DC converter according to claim 5, which is characterized in that the resonance electricity
Sense L3 first terminal is connected with square-wave generator output first terminal, the resonant inductance L3 and resonant capacitance C2 string
Connection, the resonant capacitance C2 Second terminal are connected with transformer TX1 original end winding first terminal.
7. a kind of single channel dual transformer resonance DC converter according to claim 6, which is characterized in that the rectified current
Road includes the first rectification circuit and the second rectification circuit, and first rectification circuit includes first switch and the second switch, described
Second rectification circuit includes that third switch and the 4th switch,
The first terminal of the transformer TX1 and transformer TX2 pair end winding be respectively connected to first switch and third switch
First terminal；The transformer TX1 and transformer TX2 pair end winding Second terminal are connected to output filter capacitor C3 described above
First terminal；The transformer TX1 and transformer TX2 pair end winding third terminal are respectively connected to second switch and the 4th switch
First terminal；First switch, second switch, third switch and the respective Second terminal of the 4th switch and output electricity described above
Hold C3 Second terminal to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810326956.9A CN110391748A (en) | 2018-04-12 | 2018-04-12 | A kind of single channel dual transformer resonance DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810326956.9A CN110391748A (en) | 2018-04-12 | 2018-04-12 | A kind of single channel dual transformer resonance DC converter |
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| Publication Number | Publication Date |
|---|---|
| CN110391748A true CN110391748A (en) | 2019-10-29 |
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| CN201810326956.9A Pending CN110391748A (en) | 2018-04-12 | 2018-04-12 | A kind of single channel dual transformer resonance DC converter |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1647355A (en) * | 2002-04-23 | 2005-07-27 | 皇家飞利浦电子股份有限公司 | LLC half-bridge converter |
| CN202550901U (en) * | 2012-02-29 | 2012-11-21 | 柳州五菱汽车有限责任公司 | High-power alternating current-direct current converter |
| CN202840962U (en) * | 2012-03-29 | 2013-03-27 | 上海交通大学 | 1500V input-110V output dc power supply |
| CN105450030A (en) * | 2014-09-18 | 2016-03-30 | 南京航空航天大学 | Double-transformer variable winding isolated converter and control method thereof |
| CN106452093A (en) * | 2016-12-15 | 2017-02-22 | 深圳市英威腾电气股份有限公司 | DC/DC converter |
| CN206341145U (en) * | 2016-11-07 | 2017-07-18 | 江南大学 | A kind of dual transformer series parallel structure LLC resonant converter applied to electric automobile battery charger |
| CN206712667U (en) * | 2017-05-11 | 2017-12-05 | 漳州科华技术有限责任公司 | A kind of DC/DC translation circuits |
-
2018
- 2018-04-12 CN CN201810326956.9A patent/CN110391748A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1647355A (en) * | 2002-04-23 | 2005-07-27 | 皇家飞利浦电子股份有限公司 | LLC half-bridge converter |
| CN202550901U (en) * | 2012-02-29 | 2012-11-21 | 柳州五菱汽车有限责任公司 | High-power alternating current-direct current converter |
| CN202840962U (en) * | 2012-03-29 | 2013-03-27 | 上海交通大学 | 1500V input-110V output dc power supply |
| CN105450030A (en) * | 2014-09-18 | 2016-03-30 | 南京航空航天大学 | Double-transformer variable winding isolated converter and control method thereof |
| CN206341145U (en) * | 2016-11-07 | 2017-07-18 | 江南大学 | A kind of dual transformer series parallel structure LLC resonant converter applied to electric automobile battery charger |
| CN106452093A (en) * | 2016-12-15 | 2017-02-22 | 深圳市英威腾电气股份有限公司 | DC/DC converter |
| CN206712667U (en) * | 2017-05-11 | 2017-12-05 | 漳州科华技术有限责任公司 | A kind of DC/DC translation circuits |
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Application publication date: 20191029 |
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