CN103595240A - Device and method for reducing boosting amplitude of Boost type PFC converter - Google Patents
Device and method for reducing boosting amplitude of Boost type PFC converter Download PDFInfo
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- CN103595240A CN103595240A CN201310589945.7A CN201310589945A CN103595240A CN 103595240 A CN103595240 A CN 103595240A CN 201310589945 A CN201310589945 A CN 201310589945A CN 103595240 A CN103595240 A CN 103595240A
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- switch
- inductance
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- diode
- boost
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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
- H02M3/1582—Buck-boost converters
-
- 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 invention relates to a device and method for reducing the boosting amplitude of a boost type PFC converter in the field of power supply management and the field of integrated circuit design in microelectronics. The device and method aim to reduce large-amplitude boosting of a traditional Boost type converter so as to make a circuit suitable for more application occasions and better in performance. According to the technical scheme, the device for reducing the boosting amplitude of the boost type PFC converter is composed of an inductor, a first diode, a second diode, a first switch, a second switch and a capacitor, the second diode and the capacitor are connected between the inductor and a negative input end in parallel, the other end of the inductor is a positive input end, the second diode is connected between the connecting point of the second switch and the inductor and the connecting point of the capacitor and the inductor in a forward bridging mode, current is transmitted into the inductor by the positive input end through the first switch, and the first diode is connected between the connecting point of the inductor and the first switch and the negative input end in backward mode. The device and method are mainly used for integrated circuit design and manufacturing.
Description
Technical field
The present invention relates to field of power management and microelectronic integrated circuit (IC) design field, relate in particular to power factor correction (PFC) technology, be applicable to PFC front end and single-stage pfc circuit that the amplitude of boosting is not high.Specifically, relate to and reduce the boost apparatus and method of amplitude of Boost type PFC transducer.
Background technology
Power factor correction technology is widely used in ac/dc (AC/DC) converter, and this is because adopt the converter of this technology to approach sinusoidal input current for load provides.AC/DC converter is widely used in the fields such as power management, LED driving, electric ballast, so the research of power factor correction (PFC) technology becomes most important.About the standard of Harmonics of Input, there are in the world at present the IEEE519 standard of IEEE-USA (IEEE), the IEC555-2 standard of International Electrotechnical Commission etc.In addition, European Union member countries' regulation: every power consumption equipment of selling at EU market all will meet IEC555-2 standard; 98 years these standards, through revision, have been released IEC1000-3-2 standard.For meeting above standard, power factor correction technology is widely used.
The topological structure of at present the most frequently used a kind of circuit of power factor correction is that Boost(boosts) structure, because the structure of boosting has good shaping effect, and can obtain higher power factor.Buck(step-down) structure makes inductive current discontinuous because its input current exists for zero region at input voltage near zero-crossing point, thereby has determined that it can not obtain high power factor.But Boost structure has a lot of intrinsic shortcomings for circuit of power factor correction: output voltage substantially all will be higher than 400V, and high output voltage has increased switching loss on the one hand, has increased on the one hand the electromagnetic interference of rear class DC/DC converter; Because output voltage always will be higher than input voltage, the duty ratio of switching pulse is larger; Under the condition of low linear input voltage, efficiency is not high; This in the situation that, switching current is larger, this has not only increased the conduction loss of switching tube, and has increased switching loss, therefore, circuit in the situation that low linear voltage in the situation that than low 3% left and right of high linear voltage efficiency.At this moment, Buck(step-down) structural table reveals its topological structure inherent advantages: output voltage is always lower than input voltage; Under the condition of low linear input voltage, because the switching loss of switching tube is very low, thereby obtained very high efficiency, and reduced the electromagnetic interference of rear class DC/DC converter.But the switching loss of Buck transducer under the condition of high input voltage is very large, so Buck transducer is seldom as the prime topological structure of circuit of power factor correction.
Boost topology is as the structure of the most frequently used a kind of circuit of power factor correction, its applicable various control chips have been applied maturation, but because its high voltage output, rear end often will be suitable for DC/DC converting means and meet more application scenario, in the less demanding occasion of some power factors, increase one-level DC/DC converter and significantly improved cost.Therefore, the output voltage amplitude of reduction Boost topology has very high Practical significance.
Summary of the invention
The present invention is intended to solution and overcomes the deficiencies in the prior art, reduces the significantly voltage lifting of traditional B oost type transducer, thereby makes circuit adapt to more application scenario, and in performance, have further lifting.For this reason, the technical solution used in the present invention is, reduce the boost device of amplitude of Boost type PFC transducer, by inductance, diode, switch, electric capacity, formed, diode, electric capacity are attempted by between inductance, negative input end, the inductance other end is positive input terminal, and diode forward is connected across switch, electric capacity connects between the end points of inductance; Also comprise another diode, another switch, positive input terminal is input to inductance after another switch again, another diode described in Opposite direction connection between inductance and described another switch tie point and negative input end.
The method that reduction Boost type PFC transducer boosts amplitude, realizes and comprises the steps: by means of aforementioned means
First stage: described switch and another switch is all closed, and inductive current increases gradually under the effect of supply voltage, and energy storage is in inductance, and the lasting time in this stage is t
1;
Second stage: described another switch is closed, and described switch disconnects, and inductance discharges the energy storing, and inductive current reduces is gradually charged to load capacitance at supply voltage and inductance simultaneously, and the lasting time in this stage is t
2;
Phase III, described another switch and described switch all disconnect, and this stage only has inductance to charge to load capacitance, and the speed that inductive current reduces is greater than the stage two, and the lasting time in this stage is t
3, according to weber rule have following relation:
V
in×t
1=(V
o-V
in)×t
2+V
o×t
3； （4）
Wherein, T=t
1+ t
2+ t
3, T is switch periods; (5)
By (4) (5), drawn:
So far, drawn the voltage gain relation of above-mentioned two kinds of different structures, be respectively formula (3) and formula (6), when requiring the amplitude of boosting to reduce, by reducing t
1, increase t
3two kinds of approach realize V
o/ V
inratio reduce; Input voltage is V
in, output voltage is V
o.
Technical characterstic of the present invention and effect:
For traditional Boost type transducer, output voltage all will, higher than 400V, bring a series of negative effect substantially thus.Compound Boost circuit described in the invention, the first two stage in one-period is equivalent to and is operated in boost mode, latter two stage is equivalent to and is operated in decompression mode, by the time of every one-phase is rationally set, principle, with reference to formula (5), can be controlled the amplitude of boosting flexibly flexibly.Therefore effectively improve too high this shortcoming of traditional B oost type converter output voltage, and then in the situation that retaining Boost type transducer advantage, improved many performances, expanded range of application.
Compound Boost transducer described in the invention is when as PFC front stage circuits, because it can effectively reduce the amplitude of output voltage, can reduce on the one hand the electromagnetic interference of rear class DC/DC converter; On the other hand, because output voltage needn't be significantly higher than input voltage, therefore the duty ratio of switching pulse obtains effectively reducing conversion efficiency and is improved, and then make switching current compare significantly attenuating with traditional Boost type transducer, not only reduce the conduction loss of switching tube, and reduced switching loss.
Accompanying drawing explanation
Fig. 1: the operating state of traditional B oost type topology;
Fig. 2: the improved B oost structure that has increased a switch and diode;
Fig. 3: improved Boost circuit working process;
Fig. 4: the current waveform of traditional B oost type transducer;
Fig. 5: the current waveform of compound Boost transducer set forth in the present invention.
Embodiment
The present invention compares with the circuit of traditional three kinds of topological structures, and compound Boost+Buck circuit has structurally increased a switching tube and a diode newly.In one-period, according to the combination of the different on off states of two switching tubes, circuit working is three different stages.On the one hand by regulating duty ratio to reduce output voltage, increased on the one hand an inductive discharge stage to make whole process more level and smooth, reduce the voltage stress of switch, thereby can promote the efficiency of circuit, reduce costs.
The circuit of invention is in original Boost topology herein, as Fig. 1, basis on increased an analog switch and a diode, make two working stages in original Boost type each cycle of transducer become three.
Traditional Boost type transducer course of work is briefly described as follows: when switch is closed, power supply is to induction charging, and the charging interval is t
1, after switch disconnects, power supply and inductance power to the load simultaneously, and this duration in stage is t
2.Suppose that switching frequency is far longer than ac frequency, in a switch periods, input voltage keeps constant, according to weber rule have following relation:
V
in×t
1=(V
o-V
in)×t
2； （1）
Wherein, T=t
1+ t
2, T is switch periods; (2)
By (1) (2), drawn:
Input voltage is V
in, output voltage is V
o, the lasting time in first, second and third stage is respectively t
1, t
2, t
3, the cycle is T.
The compound Boost transducer that the present invention sets forth, as Fig. 2, the closure of two switching tubes makes respectively circuit enter different mode of operations from shutoff.Specific works process is as follows:
First stage: switch S 1 and S2 are all closed, and equivalent electric circuit, as Fig. 3 (a), is equivalent to the charging stage of traditional B oost type transducer.Inductive current increases gradually under the effect of supply voltage, and energy storage is in inductance.The lasting time in this stage is t
1.
Second stage: switch S 1 closure, switch S 2 disconnects, and equivalent electric circuit, as Fig. 3 (b), is equivalent to the charging stage of discharge regime or the traditional B uck type transducer of traditional B oost type transducer.Inductance discharges the energy storing, and inductive current reduces gradually.At supply voltage and inductance, load capacitance is charged simultaneously.Above two stages are identical with traditional Boost type transducer.The lasting time in this stage is t
2.
Phase III, switch S 1 and S2 all disconnect, and equivalent electric circuit, as Fig. 3 (c), is equivalent to the discharge regime of traditional B uck type transducer.This stage only has inductance to charge to load capacitance, and the speed that inductive current reduces is greater than the stage two.The lasting time in this stage is t
3.According to weber rule have following relation:
V
in×t
1=(V
o-V
in)×t
2+V
o×t
3； （4）
Wherein, T=t
1+ t
2+ t
3, T is switch periods; (5)
By (4) (5), drawn:
So far, draw the voltage gain relation of above-mentioned two kinds of different structures, be respectively formula (3) and formula (6).When requiring the amplitude of boosting to reduce, for traditional Boost transducer, can only, by reducing the charging interval of inductance, reduce t
1realize; For compound Boost transducer set forth in the present invention, analysis mode (6), can be by reducing t
1, increase t
3two kinds of approach realize V
o/ V
inratio reduce, inductive current waveform is at t
3stage continues to decline, and descending slope is larger, as Fig. 5.The key of this invention is, on the basis of two working stages of traditional Boost type transducer, increased a stage that inductance directly discharges to load." duty ratio " in this stage also can directly have influence on the amplitude of boosting.
We can analyze a kind of situation of the limit for this one-phase of increase, can to reduce the amplitude of boosting: suppose the unlimited t that reduces
2, this one-phase of Fig. 3 (b) disappears, and can see two working stages of residue identical with traditional Buck-Boost transducer (and this circuit for traditional Buck-Boost transducer, input and output voltage is not reverse).Traditional Buck-Boost transducer has following relation: V
o/ V
in=t
1/ t
3, by regulating t
1with t
3ratio, both can boost and also can carry out step-down.Also can find out thus, this improved compound Boost transducer adds after three phases, can effectively reduce the amplitude of boosting.
Below in conjunction with specific embodiment, further describe the present invention.
Setting minimum duty cycle D is 0.1, i.e. t
1/ T>=0.1, t
2/ T>=0.1, t
3/ T>=0.1.For traditional B oost type transducer, as Fig. 1, the duty ratio expression formula of switch S is as follows:
For compound Boost transducer set forth in the present invention, as Fig. 2, the duty ratio expression formula of switch S 1 and S2 is as follows:
The duty ratio expression formula of analyzing switch S 1, can draw the following conclusions: work as t
1+ t
2during=T, switch S 1 is normally closed, and circuit equivalent is in traditional Boost type transducer.Yet, t
3/ T>=0.1, that is to say the t adding
3stage has 10% regulation to output voltage at least.
Quantitative analysis is as follows: boost expression formula and duty ratio restriction condition according to transducer, contrast as follows:
In general, 220V input voltage is according to high-end 264V, and crest voltage is 264 * 1.141=373V.So, the output voltage of traditional PFC transducer, V
o=10/9 * 373V=414V, more than being generally set as 400V.And compound Boost transducer described in this paper, output voltage V
o=8/9 * 373V=332V, has obtained effectively reducing.Therefore, compound Boost transducer described in this paper has good performance for reducing Boost type converter output voltage amplitude.
The present invention both can be used as the front stage circuits of PFC, again because of its flexibly output voltage can to require in power factor be not that very high occasion is applied as single-stage converter.
Claims (2)
1. one kind is reduced the boost device of amplitude of Boost type PFC transducer, it is characterized in that, by inductance, diode, switch, electric capacity, formed, diode, electric capacity are attempted by between inductance, negative input end, the inductance other end is positive input terminal, and diode forward is connected across switch, electric capacity connects between the end points of inductance; Also comprise another diode, another switch, positive input terminal is input to inductance after another switch again, another diode described in Opposite direction connection between inductance and described another switch tie point and negative input end.
2. reduce the boost method of amplitude of Boost type PFC transducer, it is characterized in that, by means of aforementioned means, realize and comprise the steps:
First stage: described switch and another switch is all closed, and inductive current increases gradually under the effect of supply voltage, and energy storage is in inductance, and the lasting time in this stage is t
1;
Second stage: described another switch is closed, and described switch disconnects, and inductance discharges the energy storing, and inductive current reduces is gradually charged to load capacitance at supply voltage and inductance simultaneously, and the lasting time in this stage is t
2;
Phase III, described another switch and described switch all disconnect, and this stage only has inductance to charge to load capacitance, and the speed that inductive current reduces is greater than the stage two, and the lasting time in this stage is t
3, according to weber rule have following relation:
V
in×t
1=(V
o-V
in)×t
2+V
o×t
3； （4）
Wherein, T=t
1+ t
2+ t
3, T is switch periods; (5)
By (4) (5), drawn:
So far, drawn the voltage gain relation of above-mentioned two kinds of different structures, be respectively formula (3) and formula (6), when requiring the amplitude of boosting to reduce, by reducing t
1, increase t
3two kinds of approach realize V
o/ V
inratio reduce; Input voltage is V
in, output voltage is V
o.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589945.7A CN103595240A (en) | 2013-11-20 | 2013-11-20 | Device and method for reducing boosting amplitude of Boost type PFC converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589945.7A CN103595240A (en) | 2013-11-20 | 2013-11-20 | Device and method for reducing boosting amplitude of Boost type PFC converter |
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| CN103595240A true CN103595240A (en) | 2014-02-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300786A (en) * | 2014-10-13 | 2015-01-21 | 天津大学 | Buck-Boost type converter allowing output voltage and input voltage to be in same direction |
| CN109510462A (en) * | 2018-11-12 | 2019-03-22 | 浙江工业大学 | Step-up dc-dc converter |
| CN110289771A (en) * | 2019-07-03 | 2019-09-27 | 广东美的制冷设备有限公司 | Household appliance and its voltage regulator circuit |
| CN111723998A (en) * | 2020-06-28 | 2020-09-29 | 国网湖南省电力有限公司 | Early warning method for fault of oil pressure system of generator oil pressure tank |
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| US20100148739A1 (en) * | 2008-12-17 | 2010-06-17 | Alireza Khaligh | Digital control of power converters |
| CN102355130A (en) * | 2011-10-09 | 2012-02-15 | 南通大学 | Double-tube Buck-Boost type PFC (Power Factor Correction) converter based on one-cycle control |
| CN103269160A (en) * | 2013-05-29 | 2013-08-28 | 盐城工学院 | Three-state direct current-direct current converter and control method thereof |
| CN203608082U (en) * | 2013-11-20 | 2014-05-21 | 天津大学 | Device for reducing boost amplitude of Boost type PFC converter |
-
2013
- 2013-11-20 CN CN201310589945.7A patent/CN103595240A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100148739A1 (en) * | 2008-12-17 | 2010-06-17 | Alireza Khaligh | Digital control of power converters |
| CN102355130A (en) * | 2011-10-09 | 2012-02-15 | 南通大学 | Double-tube Buck-Boost type PFC (Power Factor Correction) converter based on one-cycle control |
| CN103269160A (en) * | 2013-05-29 | 2013-08-28 | 盐城工学院 | Three-state direct current-direct current converter and control method thereof |
| CN203608082U (en) * | 2013-11-20 | 2014-05-21 | 天津大学 | Device for reducing boost amplitude of Boost type PFC converter |
Non-Patent Citations (2)
| Title |
|---|
| RAY-LEE LIN ET AL.: "Non-inverting Buck-Boost Power-Factor-Correction Converter with Wide Input-Voltage-Range Applications", 《IECON 2010-36TH ANNUAL CONFERENCE ON IEEE INDUSTRIAL SOCIETY》, 10 November 2010 (2010-11-10) * |
| 张斐等: "两开关伪连续导电模式Buck-Boost功率因数校正变换器", 《中国电机工程学报》, vol. 32, no. 9, 25 March 2012 (2012-03-25) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300786A (en) * | 2014-10-13 | 2015-01-21 | 天津大学 | Buck-Boost type converter allowing output voltage and input voltage to be in same direction |
| CN109510462A (en) * | 2018-11-12 | 2019-03-22 | 浙江工业大学 | Step-up dc-dc converter |
| CN110289771A (en) * | 2019-07-03 | 2019-09-27 | 广东美的制冷设备有限公司 | Household appliance and its voltage regulator circuit |
| CN111723998A (en) * | 2020-06-28 | 2020-09-29 | 国网湖南省电力有限公司 | Early warning method for fault of oil pressure system of generator oil pressure tank |
| CN111723998B (en) * | 2020-06-28 | 2023-07-25 | 国网湖南省电力有限公司 | Early warning method for faults of generator oil tank oil pressure system |
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Application publication date: 20140219 |