CN1866704A - Dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit - Google Patents
Dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit Download PDFInfo
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Abstract
The invention discloses a double-tube double-normal shock booster type single-stage power factor calibrating circuit, which comprises the following parts: double-normal shock transformer T, output commutation bridge Q2, double-normal shock transformer T, switching tube S1, S2, S3, S4, electrochemical capacitor C, output filter inductance Lo, output filter capacitance Co and a plurality of afterflow diodes, wherein the switching tube on the two first windings of transformer T is used for power factor adjustment and DC-DC transformed common pipe. The invention has simple structure, which is easy to operate and improves the circuit efficiency.
Description
Technical field
The present invention relates to field of power electronics, is a kind of single-level power factor correction translation circuit specifically.
Background technology
Present power factor correcting converter research and to use maximum be the power factor correcting converter of two-stage circuit structure, two controllers of the general use of sort circuit, it is sinusoidal wave that voltage and input current that is used for controlling on the storage capacitor makes it, and another is used for control output voltage makes it to keep constant.Sort circuit has very high power factor and good output characteristic, but its structure is complicated, and power must be through twice processing, and power density is low, and cost is higher.In order to reduce the cost of power factor correcting converter, in recent years, single-level power factor correction converter has appearred, it relatively simple for structure, cost is low, the power density height, can realize having very big market prospects simultaneously to the correction of input current waveform with to the adjustment of output voltage.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, have high power factor, can realize the dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit of more high-power output.
Dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit provided by the invention, its capacitor C positive pole, switching tube S1 upper end, S3 upper end and diode D3, the tandem mutually of D6 negative electrode, capacitor C negative pole, switching tube S2 lower end, S4 lower end and diode D4, D5 anode link to each other; Switching tube S1 lower end is in series by elementary winding T1 and the switching tube S2 upper end of transformer T, switching tube S3 lower end is in series by elementary winding T2 and the switching tube S4 upper end of transformer T, switching tube S1 lower end and diode D4 negative electrode join, and switching tube S3 lower end and diode D5 negative electrode join; Transformer T secondary winding meets rectifier bridge Q2, and the negative electrode of rectifier bridge Q2 meets inductance L o, and inductance L o connects the anode of output filter capacitor Co and the end of load R, and the anode of rectifier bridge Q2 connects the negative electrode of output filter capacitor Co and the other end of load R; Described transformer T adopts two normal shock transformer, i.e. two elementary windings of symmetry and secondary winding.The present invention is by obtaining BOOST single-switch power factor correcting circuit and dual-tube dual-forward-excitation circuit conversion combination.This circuit works in the discontinuous current pattern by the control input inductance, makes input current from the motion tracking input voltage, realizes the function of power factor correction.The BOOST circuit of power factor correction of prime has been formed single-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit and three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit owing to single-phase with alternative three-phase.
Single-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit provided by the invention, its input inductance La, Lb, diode D1, D2 and switching tube S2, S4 form two-tube crisscross parallel boost power factor correction circuit; Input rectifying bridge Q1 cathode terminal and inductance L a, Lb tandem, the inductance L a other end and diode D1 anode join, D1 negative electrode, the phase tandem of switching tube S2 upper end, the inductance L b other end and diode D2 anode join, D2 negative electrode, the phase tandem of switching tube S4 upper end, switching tube S2, S4 lower end are connected with rectifier bridge Q1 anode tap.It is characterized in that also comprising capacitor C, switching tube S1, S2, S3, S4, diode D3, D4, D5, D6, the double tube positive exciting crisscross parallel type power conversion circuit that transformer T and output rectifier and filter are formed.Switching tube S1 lower end is in series by elementary winding T1 and the switching tube S2 upper end of transformer T, switching tube S3 lower end is in series by elementary winding T2 and the switching tube S4 upper end of transformer T, capacitor C positive pole, switching tube S1, S3 upper end and diode D3, the tandem mutually of D6 negative electrode, capacitor C negative pole, switching tube S2, S4 lower end and diode D4, D5 anode link to each other, and are connected to rectifier bridge Q1 anode tap.The secondary winding of transformer T meets rectifier bridge Q2; The negative electrode of rectifier bridge Q2 meets inductance L o; Inductance L o connects the anode of output filter capacitor Co and the end of load R; The anode of rectifier bridge Q2 connects the negative electrode of output filter capacitor Co and the other end of load R.
Three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit provided by the invention, its input boost inductance La, Lb, Lc go here and there respectively in the three-phase inlet wire of input rectifying bridge Q1; The negative electrode of rectifier bridge Q1 respectively with the anode of capacitor C 1, the upper end of switching tube S1, the negative electrode of diode D3, the negative electrode of diode D6, the upper end of switching tube S3, the anode tandem of electrochemical capacitor C2; The anode of rectifier bridge Q1 is connected with the negative electrode of diode D1, the negative electrode of D2, the negative electrode of D7, the negative electrode of D8 respectively; The end of the same name of the elementary winding T1 of transformer T links to each other with the negative electrode of the lower end of switching tube S1, diode D4, the anode of diode D2; The different name end of elementary winding T1 is connected with the anode of the upper end of switching tube S2, diode D3; The negative electrode of capacitor C 1 is connected with the anode of diode D7, the lower end of switching tube S2, the anode of diode D4; The negative electrode of the different name end of elementary winding T2 and the anode of diode D1, diode D5, the lower end of switching tube S3 join; The upper end of the end of the same name of elementary winding T2 and the anode of diode D6, switching tube S4 joins; The anode of the anode of the lower end of the negative electrode of capacitor C 2 and switching tube S4, diode D8, diode D5 joins; Transformer T secondary winding meets rectifier bridge Q2; The negative electrode of rectifier bridge Q2 meets inductance L o; Inductance L o connects the anode of output filter capacitor Co and the end of load R; The anode of rectifier bridge Q2 connects the negative electrode of output filter capacitor Co and the other end of load R.
The current rectifying and wave filtering circuit of Circuit Fault on Secondary Transformer is selected according to the height of output voltage, the big I of electric current.This example is a bridge rectifier, is applicable to high voltage, and low pressure can be full-wave rectification, and more low-voltage is with doubly flowing rectification, and high pressure can be used voltage-multiplying circuit, available C filtering or LC filtering.
Switching tube S1 and S2 conducting simultaneously, S3 and S4 conducting simultaneously, S1 and S3 alternate conduction.During switching tube S2 (S4) conducting, input inductance is by S2 (S4) energy storage, and storage capacitor transfers the energy to Secondary winding of transformer through S1 (S3) and S2 (S4) discharge simultaneously.
The invention has the beneficial effects as follows: use single-level circuit to realize the conversion of power factor correction and power, under same switching frequency, because switching tube alternation, the input current ripple reduces half, the frequency of voltage is doubled on the output inductor, reduce the volume of output inductor and input filter, thereby further reduced the volume of complete machine.Make input and output realize electrical isolation, the danger of no bridge arm direct pass need not the winding that resets of forward converter, and transformer works in two-way magnetized state, has improved the efficient and the reliability of circuit, powerful output in can also accomplishing.
Description of drawings
Fig. 1 is the dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit schematic diagram;
Fig. 2 is single-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit schematic diagram;
Fig. 3 is a three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit schematic diagram;
Fig. 4 is the current waveform figure of boost inductance La, Lb in switch periods of three-phase circuit, Lc;
Fig. 5 (a) is the course of work of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit at [t0, t1] time period circuit;
Fig. 5 (b) is the course of work of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit at [t1, t2] time period circuit;
Fig. 5 (c) is the course of work of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit at [t2, t3] time period circuit;
Fig. 5 (d) is the course of work of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit at [t3, t4] time period circuit;
Fig. 5 (e) is the course of work of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit at [t4, t5] time period circuit;
Fig. 5 (f) is the course of work of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit at [t5, t6] time period circuit;
Fig. 5 (g) is the course of work of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit at [t6, t7] time period circuit;
Fig. 5 (h) is the course of work of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit at [t7, t8] time period circuit.
In above-mentioned accompanying drawing, Q1 is the input rectifying bridge, Q2 is two normal shock transformers for output rectifier bridge, T, and S1, S2, S3, S4 are switching tube, La, Lb, Lc are input inductance, C, Co, C1, C2 are electrochemical capacitor, and Lo is an output inductor, and R is load, Co is an output filter capacitor, and D1, D2, D3, D4, D5, D6, D7, D8 are diode.
Embodiment
Embodiment 1
The dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit (see figure 1), mainly comprise: two normal shock transformer T, output rectifier bridge Q2, switching tube S1, S2, S3, S4, electrochemical capacitor C, output inductor Lo, output filter capacitor Co and a plurality of fly-wheel diode, it is characterized in that: capacitor C positive pole, switching tube S1 upper end, S3 upper end and diode D3, the tandem mutually of D6 negative electrode, capacitor C negative pole, switching tube S2 lower end, S4 lower end and diode D4, D5 anode link to each other; Switching tube S1 lower end is in series by elementary winding T1 and the switching tube S2 upper end of transformer T, switching tube S3 lower end is in series by elementary winding T2 and the switching tube S4 upper end of transformer T, switching tube S1 lower end and diode D4 negative electrode join, and switching tube S3 lower end and diode D5 negative electrode join; Transformer T secondary winding meets rectifier bridge Q2, and the negative electrode of rectifier bridge Q2 meets inductance L o, and inductance L o connects the anode of output filter capacitor Co and the end of load R, and the anode of rectifier bridge Q2 connects the negative electrode of output filter capacitor Co and the other end of load R; Described transformer T adopts two normal shock transformer, i.e. two elementary windings of symmetry and secondary winding.The present invention is by obtaining BOOST single-switch power factor correcting circuit and dual-tube dual-forward-excitation circuit conversion combination.This circuit works in the discontinuous current pattern by the control input inductance, makes input current from the motion tracking input voltage, realizes the function of power factor correction.The BOOST circuit of power factor correction of prime has been formed single-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit and three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit owing to single-phase with alternative three-phase.
Single-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit topology (see figure 2), mainly comprise: input rectifying bridge Q1, output rectifier bridge Q2, two normal shock transformer T, switching tube S1, S2, S3, S4, input inductance La, Lb, electrochemical capacitor C, output inductor Lo, output filter capacitor Co and diode D1, D2, D3, D4, D5, D6.The negative electrode of input rectifying bridge Q1 and inductance L a, the Lb tandem, the inductance L a other end and diode D1 anode join, the D1 negative electrode, the D3 anode, the phase tandem of switching tube S2 upper end, the inductance L b other end and diode D2 anode join, the D2 negative electrode, the D6 anode, the phase tandem of switching tube S4 upper end, switching tube S1 lower end is in series by elementary winding T1 and the switching tube S2 upper end of transformer T, switching tube S3 lower end is in series by elementary winding T2 and the switching tube S4 upper end of transformer T, capacitor C positive pole, switching tube S1 upper end, S3 upper end and diode D3, the tandem of D6 negative electrode phase, capacitor C negative pole, switching tube S2 lower end, S4 lower end and diode D4, the D5 anode links to each other, be connected to rectifier bridge Q1 anode tap, switching tube S1 lower end and diode D4 negative electrode join, switching tube S3 lower end and diode D5 negative electrode join, and the secondary winding of transformer T is connected to the rectifying and wave-filtering output circuit.
In the present embodiment, the input rectifying bridge can be selected module for use, and fly-wheel diode is selected fast diode for use, and switching tube is also selected the withstand voltage full-control type device IGBT of 1200V for use, and high frequency transformer T iron core is selected FERRITE CORE for use, and its effective area is selected according to capacity.
Three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit topology (see figure 3), mainly comprise: input rectifying bridge Q1, output rectifier bridge Q2, two normal shock transformer T, switching tube S1, S2, S3, S4, input inductance La, Lb, Lc, electrochemical capacitor C1, C2, output inductor Lo, output filter capacitor Co and diode D1, D2, D3, D4, D5, D6, D7, D8.Input boost inductance La, Lb, Lc go here and there respectively in the three-phase inlet wire of input rectifying bridge Q1.The negative electrode of input rectifying bridge Q1 respectively with the anode of capacitor C 1, the upper end of switching tube S1, the negative electrode of diode D3, the negative electrode of diode D6, the upper end of switching tube S3, the anode tandem of electrochemical capacitor C2; The anode of rectifier bridge Q1 is connected with the negative electrode of diode D1, the negative electrode of D2, the negative electrode of D7, the negative electrode of D8 respectively; The end of the same name of the elementary winding T1 of transformer T links to each other with the negative electrode of the lower end of switching tube S1, diode D4, the anode of diode D2; The different name end of elementary winding T1 is connected with the anode of the upper end of switching tube S2, diode D3; The negative electrode of capacitor C 1 is connected with the anode of diode D7, the lower end of switching tube S2, the anode of diode D4; The negative electrode of the different name end of elementary winding T2 and the anode of diode D1, diode D5, the lower end of switching tube S3 join; The upper end of the end of the same name of elementary winding T2 and the anode of diode D6, switching tube S4 joins; The anode of the anode of the lower end of the negative electrode of capacitor C 2 and switching tube S4, diode D8, diode D5 joins; The secondary winding of transformer T meets rectifier bridge Q2; The negative electrode of rectifier bridge Q2 meets inductance L o; Inductance L o connects the anode of output filter capacitor Co and the end of load R; The anode of rectifier bridge Q2 connects the negative electrode of output filter capacitor Co and the other end of load R.
In the present embodiment, the diode of input rectifying bridge is all selected fast diode for use, switching tube select for use 1200V withstand voltage IGBT, fly-wheel diode is also selected fast diode for use, high frequency transformer T iron core is selected FERRITE CORE for use, its effective area is selected according to capacity.
In the above-described embodiments, power factor controlling adopts corresponding power factor correction (PFC) chip, and as the UC3854A/B of TI company, UCC3818 etc. also can adopt the IR1150 of IR company, and it is to belong to monocycle control.But these PFC chips all are single-ended output, for the drive controlling of two normal shocks, and must other two frequency divisions control and corresponding driving circuit.Multiplier PFC control in controlling used chip automatically, monocycle PFC control also can add two closed-loop controls and various existing general purpose control system and PFC chip.
The operation principle of single-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit (see figure 2) and three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit (see figure 3) is basic identical, therefore is the course of work of example explanation circuit below with the three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit.
Fig. 5 (a-h) has provided the course of work circuit diagram of three-phase dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit, and in a switch periods, its course of work is as follows:
In a power frequency period, can be divided into 12 intervals and analyze, be that example is analyzed in this interval with Ua＞0＞Ub＞Uc; And hypothesis input voltage in a switch periods is constant.Circuit has following eight kinds of mode of operations in a switch periods, and preceding four kinds of mode of operations and back four kinds of operation principles are basic identical.
(1) course of work of [t0, t1] time period circuit is shown in Fig. 5 (a), switching tube S1 and S2 conducting simultaneously, and S3 and S4 turn-off; Input boost inductance La, Lb, Lc are by switch S 1 energy storage of charging, and capacitor C 1 is added on the primary winding T1 by switch S 1 and S2 simultaneously, transmits energy for the transformer secondary output winding;
(2) course of work of [t1, t2] time period circuit is shown in Fig. 5 (b), and switching tube S1, S2, S3, S4 all turn-off, and inductance L a, Lb, Lc begin to discharge simultaneously;
(3) course of work of [t2, t3] time period circuit is shown in Fig. 5 (c), and switching tube S1, S2, S3, S4 all turn-off, inductance L b discharge off, and inductance L a, Lc continue discharge.To t3 moment inductance L a, the whole discharge offs of Lb, Lc;
(4) course of work of [t3, t4] time period circuit is shown in Fig. 5 (d), inductance L a, Lb, the whole discharge offs of Lc, and load provides energy by output inductor and electric capacity.
(5) [t4, the t5] time period, the course of work of circuit is shown in Fig. 5 (e), and during switching tube S3 and S4 conducting simultaneously, S1 and S2 turn-off; Input boost inductance La, Lb, Lc are by switch S 3 energy storage of charging, and capacitor C 2 is added on the primary winding T2 by switch S 3 and S4 simultaneously, transmits energy to secondary winding;
(6) [t5, the t6] time period, the course of work of circuit is shown in Fig. 5 (f), and switching tube S1, S2, S3, S4 all turn-off, and inductance L a, Lb, Lc begin to discharge simultaneously;
(7) [t6, the t7] time period, the course of work of circuit is shown in Fig. 5 (g), and switching tube S1, S2, S3, S4 all turn-off, inductance L b discharge off, and inductance L a, Lc continue discharge;
(8) [t7, the t8] time period, the course of work of circuit shown in Fig. 5 (h), inductance L a, Lb, the whole discharge offs of Lc, load provides energy by output inductor and electric capacity.
Claims (5)
1. dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit, it is characterized in that: capacitor C positive pole, switching tube S1 upper end, S3 upper end and diode D3, the tandem mutually of D6 negative electrode, capacitor C negative pole, switching tube S2 lower end, S4 lower end and diode D4, D5 anode link to each other; Switching tube S1 lower end is in series by elementary winding T1 and the switching tube S2 upper end of transformer T, switching tube S3 lower end is in series by elementary winding T2 and the switching tube S4 upper end of transformer T, switching tube S1 lower end and diode D4 negative electrode join, and switching tube S3 lower end and diode D5 negative electrode join; The secondary winding of transformer T meets rectifier bridge Q2, and the negative electrode of rectifier bridge Q2 meets inductance L o, and inductance L o connects the anode of output filter capacitor Co and the end of load R, and the anode of rectifier bridge Q2 connects the negative electrode of output filter capacitor Co and the other end of load R; Described transformer T adopts two normal shock transformer, i.e. two the elementary winding T1 of symmetry, T2 and secondary winding.
2. dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit according to claim 1, it is characterized in that: negative electrode and the inductance L a of the input rectifying bridge Q1 of the single-phase topology of this circuit, the Lb tandem, the inductance L a other end and diode D1 anode join, the D1 negative electrode, the D3 anode, the phase tandem of switching tube S2 upper end, the inductance L b other end and diode D2 anode join, the D2 negative electrode, the D6 anode, the phase tandem of switching tube S4 upper end, switching tube S1 lower end is in series by elementary winding T1 and the switching tube S2 upper end of transformer T, switching tube S3 lower end is in series by elementary winding T2 and the switching tube S4 upper end of transformer T, capacitor C positive pole, switching tube S1 upper end, S3 upper end and diode D3, the tandem of D6 negative electrode phase, capacitor C negative pole, switching tube S2 lower end, S4 lower end and diode D4, the D5 anode links to each other, be connected to rectifier bridge Q1 anode tap, switching tube S1 lower end and diode D4 negative electrode join, switching tube S3 lower end and diode D5 negative electrode join, and the secondary winding of transformer T is connected to the rectifying and wave-filtering output circuit.
3. dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit according to claim 1 is characterized in that: the input boost inductance La of this circuit three-phase topology, Lb, Lc go here and there respectively in the three-phase inlet wire of input rectifying bridge Q1.The negative electrode of input rectifying bridge Q1 respectively with the anode of capacitor C 1, the upper end of switching tube S1, the negative electrode of diode D3, the negative electrode of diode D6, the upper end of switching tube S3, the anode tandem of electrochemical capacitor C2; The anode of rectifier bridge Q1 is connected with the negative electrode of diode D1, the negative electrode of D2, the negative electrode of D7, the negative electrode of D8 respectively; The end of the same name of the elementary winding T1 of transformer T links to each other with the negative electrode of the lower end of switching tube S1, diode D4, the anode of diode D2; The different name end of elementary winding T1 is connected with the anode of the upper end of switching tube S2, diode D3; The negative electrode of capacitor C 1 is connected with the anode of diode D7, the lower end of switching tube S2, the anode of diode D4; The negative electrode of the different name end of elementary winding T2 and the anode of diode D1, diode D5, the lower end of switching tube S3 join; The upper end of the end of the same name of elementary winding T2 and the anode of diode D6, switching tube S4 joins; The anode of the anode of the lower end of the negative electrode of capacitor C 2 and switching tube S4, diode D8, diode D5 joins; The secondary winding of transformer T meets rectifier bridge Q2; The negative electrode of rectifier bridge Q2 meets inductance L o; Inductance L o connects the anode of output filter capacitor Co and the end of load R; The anode of rectifier bridge Q2 connects the negative electrode of output filter capacitor Co and the other end of load R.
4. dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit according to claim 1 and 2, it is characterized in that: power factor correction stage and DC/DC conversion stage are to realize single-stage by each switching tube on two elementary windings of common transformer T, and T1 and T2 are the opposite elementary winding of high frequency transformer T number of turn identical polar.
5. according to claim 1 or 3 described dual-tube dual-forward-excitation boosting type single-stage power factor correction circuits, it is characterized in that: power factor correction stage and DC/DC conversion stage are to realize single-stage by each switching tube on two elementary windings of common transformer T, and T1 and T2 are the opposite elementary winding of high frequency transformer T number of turn identical polar.
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| CNB2006100128265A CN100438286C (en) | 2006-06-09 | 2006-06-09 | Dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit |
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| CN105429445A (en) * | 2015-12-18 | 2016-03-23 | 燕山大学 | Bidirectional converter for alternating current/direct current microgrid |
| CN105553267A (en) * | 2016-01-29 | 2016-05-04 | 株洲南车时代电气股份有限公司 | Multiphase interleaving parallel DC-DC converter and control method thereof |
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| CN110149051A (en) * | 2019-06-25 | 2019-08-20 | 阿特拉斯·科普柯(无锡)压缩机有限公司 | DC-DC converter and its control method |
| CN111083853A (en) * | 2020-02-22 | 2020-04-28 | 福州大学 | Single-stage forward LED drive circuit for removing power frequency ripple |
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| WO2021179941A1 (en) * | 2020-03-12 | 2021-09-16 | Oppo广东移动通信有限公司 | Power conversion device and charging control method |
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