CN202840953U - Three-grade voltage-multiplying DC-DC converter - Google Patents
Three-grade voltage-multiplying DC-DC converter Download PDFInfo
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- CN202840953U CN202840953U CN 201220352918 CN201220352918U CN202840953U CN 202840953 U CN202840953 U CN 202840953U CN 201220352918 CN201220352918 CN 201220352918 CN 201220352918 U CN201220352918 U CN 201220352918U CN 202840953 U CN202840953 U CN 202840953U
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Abstract
The utility model discloses a three-grade voltage-multiplying DC-DC converter belonging to the technical field of power electronics. The three-grade voltage-multiplying DC-DC converter comprises a boosting circuit and a filter circuit, wherein the output end of the boosting circuit is connected with the input end of the filter circuit, the input end of the boosting circuit is connected with positive and negative electrodes of a power supply, the filter circuit is a capacitance filter circuit, and two ends of the filter circuit are respectively connected with two output ends of the boosting circuit and are used as output ends of the three-grade voltage-multiplying DC-DC converter. The three-grade voltage-multiplying DC-DC converter has the advantages of high output voltage grade, stable output direct-current voltage, simple circuit structure, small switching stress, high power utilization rate and low cost and is suitable for applications of low direct-current voltage input and high direct-current voltage output, such as photovoltaic power generation, electric vehicles, communication power supplies and the like.
Description
Technical field
The utility model relates to a kind of three grades of multiplication of voltage DC-DC converters of electric and electronic technical field, and specifically, what relate to is a kind of DC booster converter greater than the output of 15 multiplication of voltages.
Background technology
The DC-DC booster converter is the important component part of photovoltaic generation, electric automobile and communication power supply.Along with China's photovoltaic industry, new-energy automobile and the fast development of communicating by letter, more and more vigorous for the demand of DC-DC booster converter, also more and more higher to the output voltage class requirement of DC-DC booster converter.The demand for development that volume is little, lightweight, the DC-DC booster converter of the high and low direct voltage input of good stability, coefficient of safety meets photovoltaic generation, electric automobile and communicates by letter has a good application prospect.
The DC-DC booster converter can adopt scheme and non-isolation scheme with the isolation boosting transformer in order to finish than the output of low dc voltage input-High Level DC Voltage.Can adopt two kinds of multiplication of voltage methods for the latter at present: secondary alternation sum two-stage tandem.The secondary voltage-multiplying circuit is High Level DC Voltage with the low dc voltage boosting inverter of input, and circuit structure is simple, and control is easy, and cost is lower, but boost capability is still limited, can not satisfy the application scenario than the low dc voltage power supply.
With compare with the scheme of isolated form step-up transformer, it is little, simple in structure, with low cost that the DC-DC booster converter of non-isolation type has a volume, the power utilization rate is high, reliable and stable advantage.
Through the existing retrieval that is fit to the booster converter technology of low-voltage dc voltage input-high-voltage dc voltage output application scenario is found, " A Bridgeless Interleaved PWM Boost Rectifier with Intrinsic Voltage-Doubler Characteristic " (Telecommunications Energy Conference, the output voltage grade of the DC-DC booster converter of describing 2009) is low, function and poor-performing are difficult to be applied to the application scenarios such as photovoltaic generation, electric automobile and communication power supply.
In order to finish more low dc voltage input-High Level DC Voltage output, need to adopt three grades of multiplication of voltage booster circuits, the power utilization rate is high, and output DC stream wave amplitude is little, and power supply quality is high, enlarges the application scenario of low-tension supply.
In sum, existing output voltage grade than low dc voltage input-High Level DC Voltage output translator is low, is not suitable for the application scenarios such as photovoltaic generation, electric automobile and communication power supply of low voltage power supply.Along with the expansion of practical application, design a kind of simple in structure, task of top priority that booster converter that control is easy, with low cost, the output voltage grade is high has become those skilled in the art.
The utility model content
The purpose of this utility model is to solve above-mentioned deficiency of the prior art, and a kind of three grades of multiplication of voltage DC-DC booster converters are provided, and achieves the DC/DC conversion.
For realizing above-mentioned purpose, three grades of multiplication of voltage DC-DC booster converters described in the utility model, the booster circuit and the filter circuit that comprise successively cascade, the output of wherein said booster circuit links to each other with the input of described filter circuit, and described booster circuit two ends link to each other with negative pole with the positive pole of two power supplys respectively; Described filter circuit is capacitor filter, and two ends are two outputs of continuous rectifier respectively.
Described booster circuit is three grades of multiplication of voltage DC-DC translation circuits: the first electrochemical capacitor positive pole links to each other with input power is anodal, and negative pole links to each other with the input power negative pole.The first inductance two ends link to each other with first node A with input power is anodal respectively, and the second inductance two ends link to each other with Section Point B with input power is anodal respectively, and the 3rd inductance two ends link to each other with the 3rd node C with input power is anodal respectively.The one IGBT collector electrode links to each other with first node A, and its emitter links to each other with the input power negative pole; The 2nd IGBT collector electrode links to each other with Section Point B, and its emitter links to each other with the input power negative pole; The 3rd IGBT collector electrode links to each other with the 3rd node C, and its emitter links to each other with the input power negative pole.The anode of the first diode links to each other with first node A, and its negative electrode links to each other with the 4th node D; The second diode anode links to each other with the 4th node D, and its negative electrode links to each other with the 5th node E; The 3rd diode anode links to each other with the 5th node E, and its negative electrode links to each other with out-put supply is anodal.The second electrochemical capacitor negative pole links to each other with Section Point B, and its positive pole links to each other with the 4th node D, and the 3rd electrochemical capacitor negative pole links to each other with the 3rd node C, and its positive pole links to each other with the 5th node E.
The gate pole of three IGBT described in described three grades of multiplication of voltage DC-DC translation circuits is accepted the pwm pulse control signal, and so that the work schedule of three IGBT is: in a switch periods, when initial, an IGBT, the 2nd IGBT and the 3rd IGBT are open-minded simultaneously; The one IGBT, the 2nd IGBT and the 3rd IGBT turn-off successively, and the time differs 1/3 switch periods successively, and an IGBT, the 2nd IGBT and the 3rd IGBT are open-minded successively, and the time differs 1/3 switch periods successively; The duty ratio that the gate pole of each IGBT is accepted the pwm pulse control signal is identical.So three grades of multiplication of voltage direct voltages are exported in circulation.
Described filter circuit is capacitor filter, and the 4th electrochemical capacitor positive pole links to each other with out-put supply is anodal, and its negative pole links to each other with the out-put supply negative pole, and the first resistance is steady resistance and the 4th Capacitance parallel connection.
Adopt technique scheme, the utility model utilizes three grades of multiplication of voltage DC-DC translation circuits that low dc voltage is converted to High Level DC Voltage and processes, formulated the booster converter of low dc voltage input-High Level DC Voltage output, it is simple in structure to boost, and control is convenient, can be with the processing of boosting of input low dc voltage, switch stress is little, and the power utilization rate is high, and output voltage stability is good, coefficient of safety is high, can adapt to the application scenarios such as electric automobile and communication power supply.The utlity model has project organization novelty, highly versatile, low cost and other advantages.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples the technical solution of the utility model is further explained, but following content is not used in restriction protection range of the present utility model.
As shown in Figure 1, present embodiment provides a kind of DC booster converter of 24V input-385V output, and power grade is 2.0kW, comprises booster circuit 1 and the filter circuit 2 of successively cascade, and the output of booster circuit 1 links to each other with the input of filter circuit 2.
Described booster circuit 1 is three grades of multiplication of voltage DC-DC translation circuits: the first electrochemical capacitor E1 positive pole links to each other with the anodal P1 of input power, and its negative pole links to each other with input power negative pole N1.The first inductance L 1 two ends link to each other with first node A with the anodal P1 of input power respectively, and the second inductance L 2 two ends link to each other with Section Point B with the anodal P1 of input power respectively, and the 3rd inductance L 3 two ends link to each other with the 3rd node C with the anodal P1 of input power respectively.The one IGBT S1 collector electrode links to each other with first node A, and its emitter links to each other with input power negative pole N1; The 2nd IGBT S2 collector electrode links to each other with Section Point B, and its emitter links to each other with input power negative pole N1; The 3rd IGBT S3 collector electrode links to each other with the 3rd node C, and its emitter links to each other with input power negative pole N1.The anode of the first diode FRD1 links to each other with first node A, and its negative electrode links to each other with the 4th node D; The second diode FRD2 anode links to each other with the 4th node D, and its negative electrode links to each other with the 5th node E; The 3rd diode FRD3 anode links to each other with the 5th node E, and its negative electrode links to each other with out-put supply is anodal.The second electrochemical capacitor E2 negative pole links to each other with Section Point B, and its positive pole links to each other with the 4th node D, and the 3rd electrochemical capacitor E3 negative pole links to each other with the 3rd node C, and its positive pole links to each other with the 5th node E.
The gate pole of IGBT is accepted the pwm pulse control signal in described three grades of multiplication of voltage DC-DC translation circuits 1, and so that the work schedule of three IGBT is: in a switch periods, when initial, an IGBTS1, the 2nd IGBT S2 and the 3rd IGBT S3 are open-minded simultaneously; The one IGBT S1, the 2nd IGBT S2 and the 3rd IGBT S3 turn-off successively, and the time differs 1/3 switch periods successively, and an IGBT S1, the 2nd IGBTS2 and the 3rd IGBT S3 are open-minded successively, and the time differs 1/3 switch periods successively; The duty ratio that each IGBT accepts the pwm pulse control signal is identical.So three grades of multiplication of voltage direct voltages are exported in circulation.
Described inductance L 1 ~ L3 is 1mH.
Described electrochemical capacitor E1 is alminium electrolytic condenser 2200 μ F/50V, and electrochemical capacitor E2 is alminium electrolytic condenser 2200 μ F/200V, and electric capacity E3 is alminium electrolytic condenser 2200 μ F/350V.
Described IGBT S1 ~ S3 is power IGBT400V/10A/100 ° C, and the driving pulse of IGBTS1 ~ S3 is regulated according to the required output waveform of switching circuit, and switching frequency is 20kHz.
Described diode FRD1 ~ FRD3 is oppositely fast 400V/50A/100 ° of C of quick-recovery type.
Described filter circuit 2 is capacitor filter, and the 4th electrochemical capacitor E4 positive pole links to each other with the anodal P2 of out-put supply, and negative pole links to each other with out-put supply negative pole N2, and the first resistance R 1 is that steady resistance is in parallel with the 4th electrochemical capacitor E4.
Described electrochemical capacitor E4 is alminium electrolytic condenser 2200 μ F/450V.
Described resistance R 1 is 200k Ω, 5%, 2.0kW.
In the present embodiment, input direct voltage is 24V, and output dc voltage is 385V.
Present embodiment carries out work in the following manner: in the booster circuit 1, in a switch periods, when initial, the low-voltage direct input voltage is respectively the first inductance, the second inductance and the 3rd induction charging, the gate pole of IGBT S1, S2 and S3 is accepted the pwm pulse control signal, take duty ratio 0.67＜D＜1 as example, is 0.8 o'clock such as duty ratio, the one IGBT S1 turn-offs, and the first inductance L 1 is the second electric capacity E2 charging; 0.2 after the individual switch periods, an IGBT S1 is open-minded; 2/15 all after date, the 2nd IGBT S2 turn-offs, and the second inductance L 2 is the 3rd electric capacity E3 charging; 0.2 after the individual switch periods, the 2nd IGBT S2 is open-minded; After 2/15 switch periods, the 3rd IGBT S3 turn-offs, and the 3rd inductance L 3 is the 4th electric capacity E4 charging; 0.2 individual all after dates, the 3rd IGBTS3 is open-minded; When the 2nd IGBT S2 turn-off be the 3rd electric capacity E3 charging complete after the voltage of the 3rd electric capacity E3 be the twice of the second capacitance voltage E2, when the 3rd IGBT S3 turn-off be the 4th electric capacity E4 charging complete after, the voltage of the 4th electric capacity E4 is 1.5 times of the 3rd electric capacity E3 voltage, this moment, the 4th electric capacity E4 voltage was three times of the 2nd E2 capacitance voltage, alternately the pulse control signal of equal duty ratio drives respectively three IGBT, make three inductance give successively three capacitor chargings, realize thus three grades of multiplication of voltages process of boosting.
The utility model adopts three grades of multiplication of voltage DC-DC translation circuits, will input low dc voltage and raise, and the further filtering of filter circuit realizes by be transformed to High Level DC Voltage output than low dc voltage.This circuit structure is simple, and modern design is converted into high voltage with low-voltage dexterously and processes, and the controller design is also also uncomplicated, has obtained simulation analysis and experiment preliminary identification.And the weak point of existing booster converter scheme comprises: complex structure, and poor stability, step-up ratio is low, the shortcoming that cost is higher.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be apparent.Therefore, protection range of the present utility model should be limited to the appended claims.
Claims (4)
1. one kind three grades multiplication of voltage DC-DC converters comprise booster circuit and filter circuit, and the output of described booster circuit links to each other with the input of described filter circuit, it is characterized in that:
Described booster circuit is three grades of multiplication of voltage DC-DC translation circuits: the first electrochemical capacitor positive pole links to each other with input power is anodal, and negative pole links to each other with the input power negative pole; The first inductance two ends link to each other with first node A with input power is anodal respectively, and the second inductance two ends link to each other with Section Point B with input power is anodal respectively, and the 3rd inductance two ends link to each other with the 3rd node C with input power is anodal respectively; The one IGBT collector electrode links to each other with first node A, and emitter links to each other with the input power negative pole; The 2nd IGBT collector electrode links to each other with Section Point B, and emitter links to each other with the input power negative pole; The 3rd IGBT collector electrode links to each other with the 3rd node C, and emitter links to each other with the input power negative pole; The anode of the first diode links to each other with first node A, and its negative electrode links to each other with the 4th node D; The second diode anode links to each other with the 4th node D, and its negative electrode links to each other with the 5th node E; The 3rd diode anode links to each other with the 5th node E, and its negative electrode links to each other with out-put supply is anodal; The second electrochemical capacitor negative pole links to each other with Section Point B, and its positive pole links to each other with the 4th node D, and the 3rd electrochemical capacitor negative pole links to each other with the 3rd node C, and its positive pole links to each other with the 5th node E.
2. a kind of three grades of multiplication of voltage DC-DC converters according to claim 1, it is characterized in that: the gate pole of described three IGBT is accepted the pwm pulse control signal, and so that the work schedule of three IGBT is: in a switch periods, when initial, an IGBT, the 2nd IGBT and the 3rd IGBT are open-minded simultaneously; The one IGBT, the 2nd IGBT and the 3rd IGBT turn-off successively, and the time differs 1/3 switch periods successively, and an IGBT, the 2nd IGBT and the 3rd IGBT are open-minded successively, and the time differs 1/3 switch periods successively; The duty ratio that the gate pole of each IGBT is accepted the pwm pulse control signal is identical; So circulation can obtain three grades of multiplication of voltage direct voltages.
3. a kind of three grades of multiplication of voltage DC-DC converters according to claim 1 and 2, it is characterized in that: described filter circuit is capacitor filter, the 4th electrochemical capacitor positive pole links to each other with out-put supply is anodal, its negative pole links to each other with the out-put supply negative pole, and the first resistance is steady resistance and the 4th Capacitance parallel connection.
4. a kind of three grades of multiplication of voltage DC-DC converters according to claim 1 and 2 is characterized in that: the output output High Level DC Voltage of described filter circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220352918 CN202840953U (en) | 2012-07-20 | 2012-07-20 | Three-grade voltage-multiplying DC-DC converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220352918 CN202840953U (en) | 2012-07-20 | 2012-07-20 | Three-grade voltage-multiplying DC-DC converter |
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| CN202840953U true CN202840953U (en) | 2013-03-27 |
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| CN 201220352918 Expired - Fee Related CN202840953U (en) | 2012-07-20 | 2012-07-20 | Three-grade voltage-multiplying DC-DC converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595254A (en) * | 2013-10-18 | 2014-02-19 | 上海交通大学 | Multistage direct current circuit with controllable voltage |
| CN107104597A (en) * | 2017-05-27 | 2017-08-29 | 燕山大学 | High step-up ratio suspend interlock three level DC/DC converters and its control method |
| US10778105B2 (en) | 2017-12-11 | 2020-09-15 | Ford Global Technologies, Llc | Interleaved DC-DC converter for electrified vehicles |
-
2012
- 2012-07-20 CN CN 201220352918 patent/CN202840953U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595254A (en) * | 2013-10-18 | 2014-02-19 | 上海交通大学 | Multistage direct current circuit with controllable voltage |
| CN103595254B (en) * | 2013-10-18 | 2016-01-13 | 上海交通大学 | The multistage direct current circuit that voltage is controlled |
| CN107104597A (en) * | 2017-05-27 | 2017-08-29 | 燕山大学 | High step-up ratio suspend interlock three level DC/DC converters and its control method |
| US10778105B2 (en) | 2017-12-11 | 2020-09-15 | Ford Global Technologies, Llc | Interleaved DC-DC converter for electrified vehicles |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20130720 |