CN111934549A - Low ripple boost converter - Google Patents
Low ripple boost converter Download PDFInfo
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- CN111934549A CN111934549A CN202010673959.7A CN202010673959A CN111934549A CN 111934549 A CN111934549 A CN 111934549A CN 202010673959 A CN202010673959 A CN 202010673959A CN 111934549 A CN111934549 A CN 111934549A
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- winding
- power supply
- sampling circuit
- current sampling
- terminal
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- 238000004804 winding Methods 0.000 claims abstract description 63
- 238000005070 sampling Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- 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
- H02M1/14—Arrangements for reducing ripples from DC input or output
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a low-ripple boost converter, which comprises a coupling inductor, a transformer, a first power tube, a second power tube, a first fly-wheel diode, a second fly-wheel diode, a third fly-wheel diode, an output capacitor and a filter inductor, wherein the coupling inductor is connected with the transformer; the coupling inductor comprises a first winding and a second winding; the power supply is connected with the current sampling circuit wiring terminal through the first winding, the second winding, the first freewheeling diode and the filter inductor; the power supply is connected with a negative terminal of the power supply through the first winding, the primary winding and the first power tube; the power supply is connected with the second power tube through the first winding and the secondary winding; the power supply is connected with the current sampling circuit wiring terminal through the first winding, the primary winding, the third freewheeling diode and the filter inductor; the power supply is connected with the filter inductor through the first winding, the secondary winding and the second freewheeling diode; the current sampling circuit wiring terminal is connected with a power supply through an output capacitor; the current sampling circuit terminal is connected with a power supply through a load.
Description
Technical Field
The invention belongs to the technical field of boost converters, and particularly relates to a low-ripple boost converter.
Background
In the design of a conventional boost converter, in order to ensure that a lower ripple is obtained, a single-stage or multi-stage passive filtering link is usually added at an input end and an output end, or input currents are mutually offset in a multi-phase interleaving parallel manner, the structure of the boost converter is shown in fig. 1, Vin is an input voltage, Vout is an output voltage, L is an input coupling inductor, L1 and L2 are two windings of the coupling inductor respectively, T is a transformer, T1 and T2 are primary and secondary windings of the transformer respectively, D1, D2 and D3 are freewheeling diodes, Q1 and Q2 are power tubes, Cout is an output capacitor, and R load.
In the design of the conventional boost converter, in order to ensure that the input current and the output current have small ripples, a large input filter inductance value L and an output capacitor Cout are required, and a large inductance and capacitance value are required, which means the increase of the size and weight of the converter. Moreover, the conventional boost converter needs to sample the current on the two windings L1 and L2 at the same time, and the circuit is complex and has large power loss.
Namely: the conventional boost converter has the following defects: the output current has large ripple waves and a complex sampling circuit; it is difficult to meet the application requirements of low ripple boost conversion.
Disclosure of Invention
The invention aims to provide a low-ripple boost converter which has the characteristics of low output current ripple and simple current sampling circuit and can improve the output quality of the boost converter.
The invention aims to provide a low-ripple boost converter, which comprises: the power supply comprises a coupling inductor, a transformer, a first power tube, a second power tube, a first fly-wheel diode, a second fly-wheel diode, a third fly-wheel diode, an output capacitor and a filter inductor; the coupling inductor comprises a first winding and a second winding; the transformer comprises a primary winding and a secondary winding;
wherein:
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the second winding, the first freewheeling diode and the filter inductor;
the positive terminal of the power supply is connected with the negative terminal of the power supply through the first winding, the primary winding and the first power tube in sequence;
the positive terminal of the power supply is connected with the negative terminal of the power supply sequentially through the first winding, the secondary winding and the second power tube;
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the primary winding, the third freewheeling diode and the filter inductor;
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the secondary winding, the second freewheeling diode, the filter inductor;
the current sampling circuit wiring terminal is connected with a negative terminal of a power supply through an output capacitor;
and the current sampling circuit wiring terminal is connected with a negative terminal of a power supply through a load.
The invention has the advantages and positive effects that:
by adopting the technical scheme, the output of the boost converter is connected with the inductor with a small inductance value (microHenry level) in series, so that the output current peak generated by the leakage inductance of the transformer T is inhibited, the output current ripple can be obviously reduced, and the capacitance value of the output capacitor is obviously reduced; after the inductor is connected in series, the output current is changed into continuous current which can be directly used for current control, and current feedback control can be realized only by one current sampling circuit.
The invention adopts a mode of outputting the series small inductance value inductor, improves the output voltage quality and simplifies the current sampling circuit.
1. The invention realizes the performance of low output current ripple of the boost converter, and has important significance for reducing output capacitance and improving output voltage quality;
2. according to the invention, the inductor with a small inductance value is connected in series on the output side, so that the simplification of a current sampling circuit can be realized, and the current sampling efficiency is improved;
3. the invention has simple circuit and few components and is easy to realize hardware circuit.
Drawings
FIG. 1 is a circuit diagram of a conventional solution;
fig. 2 is a circuit diagram of a preferred embodiment of the present invention.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 2, Vin is an input voltage of the dc power supply, Vout is an output voltage, L is a coupling inductor, L1 and L2 are two windings of the coupling inductor, i.e., a first winding L1 and a second winding L2, T is a transformer, T1 and T2 are primary and secondary windings of the transformer, i.e., T1 is a primary winding, T2 is a secondary winding, D1 is a first freewheeling diode, D2 is a second freewheeling diode, D3 is a third freewheeling diode, Q1 is a first power transistor, Q2 is a second power transistor, Cout is an output capacitor, and R is a load.
The technical scheme of the invention is as follows:
a low ripple boost converter, comprising: the circuit comprises a coupling inductor L, a transformer T, a first power tube, a second power tube, a first fly-wheel diode, a second fly-wheel diode, a third fly-wheel diode, an output capacitor and a filter inductor; the coupling inductor comprises a first winding and a second winding; the transformer comprises a primary winding and a secondary winding;
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the second winding, the first freewheeling diode and the filter inductor;
the positive terminal of the power supply is connected with the negative terminal of the power supply through the first winding, the primary winding and the first power tube in sequence;
the positive terminal of the power supply is connected with the negative terminal of the power supply sequentially through the first winding, the secondary winding and the second power tube;
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the primary winding, the third freewheeling diode and the filter inductor;
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the secondary winding, the second freewheeling diode, the filter inductor;
the current sampling circuit wiring terminal is connected with a negative terminal of a power supply through an output capacitor;
and the current sampling circuit wiring terminal is connected with a negative terminal of a power supply through a load.
According to the invention, the output of the boost converter is connected with the inductor with a microhenry level and a small inductance value in series, so that the output current peak generated by the leakage inductance of the transformer T is inhibited, the output current ripple is obviously reduced, and the capacitance value of the output capacitor is obviously reduced; in addition, after the inductor is connected in series, the output current is changed into continuous current which can be directly used for current control, so that feedback control can be realized by only one current sampling circuit.
The boost converter with low output current ripple is suitable for high-performance boost power conversion occasions. Compared with the prior art, the invention has the advantages of low output current ripple, small output capacitance value of the output capacitor and simple current sampling circuit, and is particularly suitable for occasions with high requirements on the characteristics of the boost converter.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (1)
1. A low ripple boost converter, comprising: the power supply comprises a coupling inductor, a transformer, a first power tube, a second power tube, a first fly-wheel diode, a second fly-wheel diode, a third fly-wheel diode and an output capacitor; the coupling inductor comprises a first winding and a second winding; the transformer comprises a primary winding and a secondary winding; the method is characterized in that: the filter also comprises a filter inductor; wherein:
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the second winding, the first freewheeling diode and the filter inductor;
the positive terminal of the power supply is connected with the negative terminal of the power supply through the first winding, the primary winding and the first power tube in sequence;
the positive terminal of the power supply is connected with the negative terminal of the power supply sequentially through the first winding, the secondary winding and the second power tube;
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the primary winding, the third freewheeling diode and the filter inductor;
the positive terminal of the power supply is connected with the current sampling circuit wiring terminal sequentially through the first winding, the secondary winding, the second freewheeling diode, the filter inductor;
the current sampling circuit wiring terminal is connected with a negative terminal of a power supply through an output capacitor;
and the current sampling circuit wiring terminal is connected with a negative terminal of a power supply through a load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010673959.7A CN111934549A (en) | 2020-07-14 | 2020-07-14 | Low ripple boost converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010673959.7A CN111934549A (en) | 2020-07-14 | 2020-07-14 | Low ripple boost converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111934549A true CN111934549A (en) | 2020-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010673959.7A Pending CN111934549A (en) | 2020-07-14 | 2020-07-14 | Low ripple boost converter |
Country Status (1)
| Country | Link |
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| CN (1) | CN111934549A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060028187A1 (en) * | 2004-08-09 | 2006-02-09 | Sangsun Kim | DC to DC converter with high frequency zigzag transformer |
| CN101411049A (en) * | 2006-03-03 | 2009-04-15 | 先进能源工业公司 | Interleaved soft switching bridge power converter |
| CN104993693A (en) * | 2015-06-26 | 2015-10-21 | 深圳市航天新源科技有限公司 | Transconductance mode control circuit for voltage source |
| CN105226941A (en) * | 2015-09-23 | 2016-01-06 | 中国科学院电工研究所 | A kind of space bidirectional, dc chopper circuit topology |
| CN105612687A (en) * | 2013-06-26 | 2016-05-25 | 华为技术有限公司 | DC-DC boost converter for photovoltaic applications based on the concept of the three-state switching cell |
| CN107404232A (en) * | 2017-06-23 | 2017-11-28 | 深圳市航天新源科技有限公司 | A kind of two-way DC DC converters |
| CN207134988U (en) * | 2017-09-08 | 2018-03-23 | 三峡大学 | A kind of Buck converters of multichannel input |
| KR20190136294A (en) * | 2018-05-30 | 2019-12-10 | 한국항공우주연구원 | DC to DC Converting Apparatus |
-
2020
- 2020-07-14 CN CN202010673959.7A patent/CN111934549A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060028187A1 (en) * | 2004-08-09 | 2006-02-09 | Sangsun Kim | DC to DC converter with high frequency zigzag transformer |
| CN101411049A (en) * | 2006-03-03 | 2009-04-15 | 先进能源工业公司 | Interleaved soft switching bridge power converter |
| CN105612687A (en) * | 2013-06-26 | 2016-05-25 | 华为技术有限公司 | DC-DC boost converter for photovoltaic applications based on the concept of the three-state switching cell |
| CN104993693A (en) * | 2015-06-26 | 2015-10-21 | 深圳市航天新源科技有限公司 | Transconductance mode control circuit for voltage source |
| CN105226941A (en) * | 2015-09-23 | 2016-01-06 | 中国科学院电工研究所 | A kind of space bidirectional, dc chopper circuit topology |
| CN107404232A (en) * | 2017-06-23 | 2017-11-28 | 深圳市航天新源科技有限公司 | A kind of two-way DC DC converters |
| CN207134988U (en) * | 2017-09-08 | 2018-03-23 | 三峡大学 | A kind of Buck converters of multichannel input |
| KR20190136294A (en) * | 2018-05-30 | 2019-12-10 | 한국항공우주연구원 | DC to DC Converting Apparatus |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20211122 Address after: 300384 No. 6 Huake No. 7 Road, Binhai New Area, Tianjin Binhai High-tech Industrial Development Zone Applicant after: The 18th Research Institute of China Electronics Technology Group Corporation Applicant after: CETC Energy Co.,Ltd. Address before: 300384 No. 6 Huake No. 7 Road, Binhai New Area, Tianjin Binhai High-tech Industrial Development Zone Applicant before: The 18th Research Institute of China Electronics Technology Group Corporation |
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Application publication date: 20201113 |
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