CN107222110A - A kind of non-isolated large velocity ratio DC dc converter - Google Patents
A kind of non-isolated large velocity ratio DC dc converter Download PDFInfo
- Publication number
- CN107222110A CN107222110A CN201710646671.9A CN201710646671A CN107222110A CN 107222110 A CN107222110 A CN 107222110A CN 201710646671 A CN201710646671 A CN 201710646671A CN 107222110 A CN107222110 A CN 107222110A
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- CN
- China
- Prior art keywords
- gate
- switch device
- controlled switch
- converter
- velocity ratio
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- 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.)
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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
- H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of non-isolated large velocity ratio DC dc converter, the circuit includes the controllable input switch device being connected with input voltage source, one auto-transformer, a capacitance being connected with auto-transformer primary side winding, the controllable output switch device being connected with auto-transformer vice-side winding, the driver circuit being connected with gate-controlled switch device control end, the low pass filter being made up of outputting inductance and electric capacity, characterized in that, the circuit is converted by obtaining large velocity ratio DC under high duty cycle operational.This non-isolated large velocity ratio DC dc converter that the present invention is provided, pressure drop is low on transformer, input switch pulse current is small, input/output switching device loss is low, substantially increase the operating efficiency of Switching Power Supply, a kind of new scheme is provided to high voltage input low-voltage output DC converter, the power density for raising Switching Power Supply contributes.
Description
Technical field
The present invention relates to field of switch power, the more particularly to big non-isolated DC-dc conversion of input and output no-load voltage ratio
Device.
Background technology
Input voltage mainly by some circuit topology frameworks, is converted into satisfactory voltage by Switching Power Supply.Closely
Nian Lai, with the development of electronic technology, particularly data processing and the fast lifting of transmission speed, to the power and power of power supply
The requirement of density constantly rises, and makes the efficiency of raising converter and turns into the key for realizing high power and high power density.At present more
The power module of low-voltage output is needed come more electronic equipments, is converted for the large velocity ratio that high voltage inputs low-voltage output
For device, traditional decompression circuit has many defects, such as：Dutycycle is small, and input pulse electric current is big, and efficiency is low, and these all make
It is difficult extensive use to obtain traditional decompression circuit.Conventional buck circuit is as shown in Figure 1.Inputted with DC voltage 48V, 1V is output as
Example, traditional BUCK circuits, dutycycle D=Vo/Vin=2%, it is seen that dutycycle very little, it is very big that this allows for input pulse electric current, greatly
Input current then needs more input filter devices, while high current flows through the switching device of high pressure, the loss of generation is increased,
Cause the efficiency of Switching Power Supply very low, thus make the power density of Switching Power Supply be difficult to improve.In addition, traditional BUCK lines
Road, not perfect enough, once primary side switch component failure is short-circuit, the high voltage of input will be applied directly in load, it is easy to damaged
The equipment of user.
In order to solve the problem of above-mentioned dutycycle is small inefficient, obtained the invention provides one kind under high duty cycle operational
The non-isolated large velocity ratio DC-DC converter obtained.
The content of the invention
Technical problem solved by the invention is to provide a kind of non-isolated large velocity ratio DC-to-dc of achievable high duty ratio
Converter.
The present invention solves the technical scheme that is used of above-mentioned technical problem：A kind of non-isolated large velocity ratio DC-to-dc becomes
Parallel operation, the circuit includes the controllable input switch device being connected with input voltage source, an auto-transformer, with auto-transformer
A connected capacitance of primary side winding, the controllable output switch device being connected with auto-transformer vice-side winding is and controllable
The connected driver circuit of switching device control end, the low pass filter being made up of outputting inductance and electric capacity, it is characterised in that the line
Road under high duty cycle operational by obtaining large velocity ratio DC-dc conversion.
Preferably, above-mentioned non-isolated large velocity ratio DC-DC converter, it is characterised in that above-mentioned gate-controlled switch device, the
One gate-controlled switch device and the second gate-controlled switch device are connected with input voltage source, and the 3rd gate-controlled switch device and the 4th controllable is opened
Device is closed with the vice-side winding of auto-transformer to be connected.
Preferably, above-mentioned non-isolated large velocity ratio DC-DC converter, it is characterised in that controllable input switch device by
First gate-controlled switch device and the second gate-controlled switch device are constituted, and controllable output switch device is by the 3rd gate-controlled switch device and the
Four gate-controlled switch devices are constituted.
Preferably, above-mentioned non-isolated large velocity ratio DC-DC converter, it is characterised in that the first gate-controlled switch device and
3rd gate-controlled switch device synchronization is switched, the second gate-controlled switch device and the 4th switching device synchro switch.
Preferably, above-mentioned non-isolated large velocity ratio DC-DC converter, it is characterised in that the first gate-controlled switch device one
End is connected with the positive pole of input voltage source, and the other end connects capacitance, the other end of capacitance and auto-transformer
Primary side winding is connected, and capacitance in the course of the work, assume responsibility for higher voltage drop, transformer is operated in relatively low electricity
Pressure, and in the first gate-controlled switch tube failure, the equipment of insulation blocking secondary；Second gate-controlled switch device one termination first
Gate-controlled switch device, the other end connects the negative pole of input voltage source.
Preferably, above-mentioned non-isolated large velocity ratio DC-DC converter, it is characterised in that the pair of above-mentioned auto-transformer
Side winding can be a winding by a 3rd gate-controlled switch device connect input voltage source negative pole or two around
Group is connected to the negative pole of input voltage source together by a 3rd gate-controlled switch device and the 4th switching device respectively.
Preferably, above-mentioned non-isolated large velocity ratio DC-DC converter, it is characterised in that the negative pole of input voltage source with
The negative of output voltage is connected together.
The invention provides a kind of non-isolated large velocity ratio DC-DC converter of achievable high duty ratio, simple in construction,
Cost is low, loss is small, high efficiency, makes the non-isolation type Switching Power Supply that high voltage inputs low-voltage output using more extensive, is
The development of new and high technology electronic product is promoted to contribute.
Brief description of the drawings
Fig. 1 is traditional BUCK conspectuses.
Fig. 2 be secondary be a winding non-isolated large velocity ratio DC-DC converter.
Fig. 3 be secondary be two windings non-isolated large velocity ratio DC-DC converter.
Fig. 4 is the timing diagram of controlled tr tube drive signal.
Graph of a relation of the dutycycle with input voltage when Fig. 5 is one winding of secondary.
Embodiment
The embodiment of circuit of the present invention is provided below in conjunction with the accompanying drawings, to describe technical scheme in detail.
Secondary such as auto-transformer in Fig. 2 is that the secondary of auto-transformer in a winding, Fig. 3 is two windings.This
In gate-controlled switch device SH,SL,SA,SBIt is MOSFET, SHAnd SASynchro switch, SLAnd SBSynchro switch.CmIt is capacitance, np
It is the primary side winding number of turn of auto-transformer, nsIt is the vice-side winding number of turn of auto-transformer, LoIt is outputting inductance, CoIt is output
Electric capacity, LoWith CoThe low pass filter of output is constituted, R is output loading.
If Fig. 4 is metal-oxide-semiconductor SH, SAAnd SL, SBDrive signal timing diagram, drive signal be high level when, metal-oxide-semiconductor is opened
It is logical, when drive signal is low level, metal-oxide-semiconductor shut-off.
In t1To t2Stage, SH, SADrive signal be high level, SH, SAIt is open-minded, SL, SBShut-off, electric current is electric from input
The positive pole in source flows through switching tube SH, capacitance CmOn set up voltage Vcm, electric current pass through transformer magnetizing inductance Lm, electric current side
To on line map from top to bottom；The sense of current of transformer secondary winding is to flow from the bottom up, i.e. the negative warp from input power
Cross SAWith transformer secondary winding to VA, then by outputting inductance Lo, to output voltage VoJust, V is flowed tooNegative, VoIt is negative
It is connected together with the negative pole of input power.
In t2To not arriving t3Stage, SH, SADo not complete switch off, electric current is walked from parasitic capacitance and body diode；SL, SBDo not have also
Open-minded, electric current is from SL, SBBody diode walk, direction is under（Input power it is negative）Up, VATo the electric current side of output voltage
To constant.
In t3Moment, SH, SAComplete switch off, SL, SBNot open-minded, electric current is still walked along original direction from body diode；
Electric current i inside static exciter inductancelmIt is being gradually reduced, direction or original direction are flowed from top to bottom.
In t3To t4Stage, SH, SAComplete switch off, SL, SBIt is completely open-minded, the electric current i inside magnetizing inductancelmDirection changes
Become, flow from the bottom up.Voltage on transformer primary side winding is equal to capacitance CmOn voltage.
By taking one winding of transformer secondary as an example：
In t1To t2Stage, SH, SAIt is open-minded, SL, SBVoltage in shut-off, primary side winding：
VP,D=Vin-Vcm -ns /np*VP,D
V can be calculatedP,D=np/(np+ns)*(Vin-Vcm)
In t3To t4Stage, SH, SAShut-off, SL, SBDuring opening, the voltage in primary side winding：
VP,1-D= Vcm
According to the magnetic balance on static exciter inductance Lm：
VP,D*D=(1-D)*Vcm
V can be calculatedcm=KP*D*Vin/(1-Ks*D)
Voltage on transformer secondary winding：VS=ns /np*VP,D
VO=D*VS=D*Vin*(1-D)/(1-Ks*D)
Above KP=np/(np+ns),Kn=nn/(np+ns), KP+Kn=1
Graph of a relation (V of the dutycycle with input voltage when Fig. 5 is one winding of secondaryo=5V,np=5,ns=2), it can be seen by Fig. 5
Go out, the dutycycle D of converter can take very big value.
During transformer works, D is very big, capacitance CmBear and load is born on larger pressure drop, winding
Pulsating current on voltage very little, input switch is small, by the relation of the turn ratio, and the voltage stress born on secondary-side switch pipe is more
Small, voltage stress in primary side switch and secondary-side switch pipe is small can to select the switching tube of low-voltage, can thus realize low electricity
High-current output is pressed, in addition, input current is small, can greatly reduce power attenuation, electricity is improved on the basis of low cost
The operating efficiency in source, can further improve the power density of power supply.
Although the foregoing describing the specific implementation circuit of the present invention, it will be appreciated by those of skill in the art that these
It is merely illustrative of, on the premise of the principle and essence without departing substantially from the present invention, a variety of changes can be made to these implementation circuits
More or modification.Therefore, protection scope of the present invention is defined by the appended claims.
Claims (7)
1. a kind of non-isolated large velocity ratio DC-DC converter, the circuit includes the controllable input being connected with input voltage source and opened
Close device, an auto-transformer, a capacitance being connected with auto-transformer primary side winding, with auto-transformer secondary
The connected controllable output switch device of winding, the driver circuit being connected with gate-controlled switch device control end, by outputting inductance and electricity
Hold the low pass filter of composition, it is characterised in that the circuit becomes by obtaining large velocity ratio DC-to-dc under high duty cycle operational
Change.
2. a kind of non-isolated large velocity ratio DC-DC converter as claimed in claim 1, it is characterised in that above-mentioned controllable to open
Close device, the first gate-controlled switch device and the second gate-controlled switch device be connected with input voltage source, the 3rd gate-controlled switch device with
4th gate-controlled switch device is connected with the vice-side winding of auto-transformer.
3. a kind of non-isolated large velocity ratio DC-DC converter as claimed in claim 2, it is characterised in that controllable input is opened
Close device to be made up of the first gate-controlled switch device and the second gate-controlled switch device, controllable output switch device is by the 3rd gate-controlled switch
Device and the 4th gate-controlled switch device are constituted.
4. a kind of non-isolated large velocity ratio DC-DC converter as claimed in claim 2, it is characterised in that first controllable opens
Close device and the 3rd gate-controlled switch device synchronization switch, the second gate-controlled switch device and the 4th switching device synchro switch.
5. a kind of non-isolated large velocity ratio DC-DC converter as claimed in claim 1, it is characterised in that first controllable opens
Close device one end with the positive pole of input voltage source to be connected, other end connection capacitance, the other end and self coupling of capacitance
The primary side winding of transformer is connected, and capacitance in the course of the work, assume responsibility for higher voltage drop, be operated in transformer
Under relatively low voltage, and in the first gate-controlled switch tube failure, the equipment of insulation blocking secondary；Second gate-controlled switch device one
The first gate-controlled switch device is terminated, the other end connects the negative pole of input voltage source.
6. a kind of non-isolated large velocity ratio DC-DC converter as claimed in claim 1, it is characterised in that above-mentioned self coupling becomes
The vice-side winding of depressor can be the negative pole that a winding connects input voltage source by a 3rd gate-controlled switch device, can also
It is that two windings are connected to input voltage source together by a 3rd gate-controlled switch device and the 4th switching device respectively
Negative pole.
7. a kind of non-isolated large velocity ratio DC-DC converter as claimed in claim 1, it is characterised in that input voltage source
Negative pole and the negative of output voltage be connected together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710646671.9A CN107222110A (en) | 2017-08-01 | 2017-08-01 | A kind of non-isolated large velocity ratio DC dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710646671.9A CN107222110A (en) | 2017-08-01 | 2017-08-01 | A kind of non-isolated large velocity ratio DC dc converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107222110A true CN107222110A (en) | 2017-09-29 |
Family
ID=59954397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710646671.9A Withdrawn CN107222110A (en) | 2017-08-01 | 2017-08-01 | A kind of non-isolated large velocity ratio DC dc converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107222110A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682752A (en) * | 2020-05-21 | 2020-09-18 | 西安交通大学 | Isolated type high-voltage-reduction-ratio DC-DC converter without transformer |
| CN111682757A (en) * | 2020-05-21 | 2020-09-18 | 西安交通大学 | Non-isolated high-buck-gain DC-DC converter for data center power supply voltage regulation module |
-
2017
- 2017-08-01 CN CN201710646671.9A patent/CN107222110A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682752A (en) * | 2020-05-21 | 2020-09-18 | 西安交通大学 | Isolated type high-voltage-reduction-ratio DC-DC converter without transformer |
| CN111682757A (en) * | 2020-05-21 | 2020-09-18 | 西安交通大学 | Non-isolated high-buck-gain DC-DC converter for data center power supply voltage regulation module |
| CN111682752B (en) * | 2020-05-21 | 2021-09-03 | 西安交通大学 | Isolated type high-voltage-reduction-ratio DC-DC converter without transformer |
| CN111682757B (en) * | 2020-05-21 | 2021-11-19 | 西安交通大学 | Non-isolated high-voltage-reduction-gain DC-DC converter |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 212000 No.298, daijiamen Road, Zhenjiang high tech Zone, Zhenjiang City, Jiangsu Province Applicant after: JIANGSU ZHAONENG ELECTRONIC CO.,LTD. Address before: No.99, dingmaojing 15th Road, Zhenjiang New District, Zhenjiang City, Jiangsu Province, 212009 Applicant before: JIANGSU ZHAONENG ELECTRONIC CO.,LTD. |
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| CB02 | Change of applicant information | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170929 |
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| WW01 | Invention patent application withdrawn after publication |