CN100358226C - Single switch double output booster converter - Google Patents
Single switch double output booster converter Download PDFInfo
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- CN100358226C CN100358226C CNB2005100413715A CN200510041371A CN100358226C CN 100358226 C CN100358226 C CN 100358226C CN B2005100413715 A CNB2005100413715 A CN B2005100413715A CN 200510041371 A CN200510041371 A CN 200510041371A CN 100358226 C CN100358226 C CN 100358226C
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- diode
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- input inductance
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Abstract
The present invention relates to a single switch double-output booster converter comprising a voltage division capacitance circuit composed of a power supply (Vin) and voltage division capacitors (Cd1) and (Cd2), a conversion branch composed of two input induction windings (N1) and (N3) and a switch tube (Q), and two-way rectification filtration circuit composed of two rectification diodes (D1) and (D3) and two filtration capacitors (Cf1) and (Cf2). The present invention is characterized in that two electric current branches composed of a coupling inductance winding (N2), an additional diode (D2), a coupling inductance winding (N4) and an additional diode (D4); through the two electric current branches, electric current in the rectification diodes (D1) and (D3) is diverted to each branch of the electric current to realize the natural on-off of the rectification diodes (D1) and (D3); the leakage inductance of the two electric current branches restrains the reverse recovery current of the two branches. Thus, the converter has simple structure, restrains reverse recovery electric currents, reduces switch loss and electromagnetic interference, and enhances the reliability and conversion efficiency.
Description
One, technical field
Single switch double output booster converter of the present invention, the DC converter of genus transformation of electrical energy device.
Two, background technology
Booster converter is widely used in the front stage converter of distributed power supply system, realizes boosting or power factor correction.Transformation of electrical energy devices such as half-bridge DC converter, half-bridge inverter, dual buck half bridge inverter, three-level DC converter, three-level inverter need adopt the dc bus with mid-point voltage, usually adopt two booster converters as its front stage converter, and needing two cover control circuits, circuit cost is higher.
In middle large-power occasions, often adopt inductive current continuous mode booster converter.There is reverse-recovery problems in its output rectifier diode, and oppositely recovery will cause too high electric current and due to voltage spikes, produce serious electromagnetic interference, and the safe operation that jeopardizes power device has reduced the reliability of converter.Active clamping circuir can suppress the reverse recovery of diode well, and realizes the soft switch of booster converter, but has increased the complexity of control and the cost of circuit.Adopt passive and nondestructive to absorb the reverse-recovery problems that circuit can alleviate diode, will bear higher voltage and current stress, increased the on-state loss of circuit, and absorbed the circuit more complicated but passive and nondestructive absorbs the device of circuit.
Three, summary of the invention
The objective of the invention is at the deficiencies in the prior art, propose a kind of simple in structure, can suppress oppositely to recover, reduce switching loss and electromagnetic interference, improve the single switch double output booster converter of reliability and conversion efficiency.The composition of single switch double output booster converter of the present invention is, the positive pole of dividing potential drop condenser network is connected in the end of the same name of the first input inductance winding, the different name end of this input inductance winding divides two-way, one the road is connected in the switching tube drain electrode, the source electrode of this switching tube is connected in the end of the same name of the 3rd input inductance winding, and the different name end of the 3rd input inductance winding is connected in dividing potential drop condenser network negative pole and forms a loop; Another road is connected in first diode anode, the negative electrode of this first diode is connected in the positive pole of the output filter capacitor circuit of two forward series connection, the negative pole of this output filter capacitor circuit is connected in the anode of the 3rd diode, the negative electrode of this 3rd diode is connected on the tie point of switching tube source electrode and the 3rd input inductance winding, and form another loop through the 3rd input inductance winding to dividing potential drop condenser network negative pole, the series connection point of two output filter capacitors links to each other with the series connection mid point of two dividing potential drop electric capacity, constitute the dual output circuit, be characterized in, on the series circuit of the first input inductance winding and first diode also and connect the second input inductance winding and branch road that additional diode is in series that and the first input inductance winding are coupled, in like manner on the series circuit of the 3rd input inductance winding and the 3rd diode also and connect the branch road that the 4th input inductance winding that one and the second input inductance winding be coupled and another additional diode are in series.Shift the electric current of exporting in the rectifier diode by two branch roads, realize turn-offing naturally of output rectifier diode; Leakage inductance by coupling inductance suppresses the reverse recovery current in the branch road that coupling inductance and additional diode constitute.This converter only adopts an active switch and a magnetic element, and circuit topological structure is succinct, and suppresses oppositely to recover, and has reduced switching loss, has reduced electromagnetic interference, has improved the reliability and the conversion efficiency of circuit.
This converter is applicable to the front stage converter that adopts the transformation of electrical energy device with mid-point voltage dc bus as needs such as half-bridge DC converter, half-bridge inverter, dual buck half bridge inverter, three-level DC converter, three-level inverters.
Four, description of drawings
Accompanying drawing 3-9 is the equivalent circuit structure schematic diagram of each switch mode.
Main designation in the above-mentioned accompanying drawing: Vin---supply voltage.Cd1～Cd2---input dividing potential drop electric capacity.Q---power switch pipe.The parasitic capacitance of CQ---power switch pipe.D1～D4---diode.N1, N2, N3, N4---coupling inductance winding.The equivalent magnetizing inductance of Lm1, Lm2---coupling inductance.The equivalent leakage inductance of Lk1, Lk2---coupling inductance.Cf1～Cf2---output filter capacitor.RLd1, RLd2---load.Vo1, Vo2---output voltage.VDS---power switch pipe leaks, the source electrode both end voltage.Iin---input current.IQ---by the electric current of power switch pipe.ILm---close the exciting current of inductance.ID1～iD4---cross the electric current of diode D1～D4.
Five, embodiment
With accompanying drawing 1 is example, narrate circuit of the present invention and form structure, accompanying drawing 1 is the single switch double output booster converter electrical block diagram, comprise the dividing potential drop condenser network that power supply Vin and dividing potential drop capacitor C d1, Cd2 form, the conversion branch road that two input inductance winding N1, N3 and switching tube Q form, two rectifier diode D1, D3 and two two-way current rectifying and wave filtering circuits that filter capacitor Cf1～Cf2 forms are characterized in that N1, N2, N3, N4 are 4 windings of coupling inductance.Coupling inductance winding N2 and diode D2 constitute a current branch, current transfer among the diode D1 is arrived this branch road, realize turn-offing naturally of diode D1, utilize leakage inductance in coupling inductance winding N2, the diode D2 formation branch road to suppress the reverse recovery of this branch road.Coupling inductance winding N4, diode D4 constitute another current branch, current transfer among the diode D3 is arrived this branch road, realize turn-offing naturally of diode D3, utilize leakage inductance in coupling inductance winding N4, the diode D4 formation branch road to suppress the reverse recovery of this branch road.
Be main circuit structure with accompanying drawing 1 below, 3～9 narrate concrete operation principle of the present invention in conjunction with the accompanying drawings.By accompanying drawing 2 as can be known whole converter a switch periods 7 kinds of switch mode are arranged, be respectively that [t0, t1], [t1, t2], [t2, t3], [t3, t4], [t4, t5], [t5, t6], [t6, t0], following working condition to each switch mode are made a concrete analysis of.
Before analyzing, make the following assumptions: 1. converter is operated in the inductive current continuous mode.2. be ideal transformer with the coupling inductance equivalence, the combination of magnetizing inductance and leakage inductance.The number of turn of winding N2 is slightly larger than winding N1; The number of turn of winding N4 is slightly larger than winding N3.3. dividing potential drop capacitor C d1 and Cd2 capacity are very big and equal, and its voltage is half of input voltage vin, and promptly Vcd1=Vcd2=Vin/2 can regard the voltage source that voltage is Vin/2 as.4. output filter capacitor Cf1 and Cf2 capacity are very big and equal, can regard the voltage source of voltage for ± Vo respectively as.
1. switch mode 1[t0, t1] [corresponding to accompanying drawing 3]
The t0 moment, switching tube Q conducting, output rectifier diode D1～D4 ends, and under the effect of input voltage, the magnetizing current of coupling inductance is linear to rise.
2. switch mode 2[t1, t2] [corresponding to accompanying drawing 4]
T1 is on-off switching tube Q constantly, and the magnetizing current of coupling inductance is to the parasitic capacitance CQ charging of switching tube Q, and switching tube Q both end voltage is linear to rise.
3. switch mode 3[t2, t3] [corresponding to accompanying drawing 5]
T2 constantly, diode D2, D4 conducting because the number of turn of winding N1, N3 is slightly less than winding N2, N4, this moment diode D1, D3 remain off.
4. switch mode 4[t3, t4] [corresponding to accompanying drawing 6]
T3 switching tube Q both end voltage constantly rises to 2Vo, output rectifier diode D1, D2 conducting.Convert under the effect of winding N2 both end voltage at output voltage and winding N1 both end voltage, leakage inductance Lk1 bears forward voltage, and the current i D2 in the current branch that winding N2 and diode D2 constitute is linear to rise.The linear rising of current i D4 in the current branch of winding N4 and diode D4 formation in like manner.Electric current begins to shift from output rectifier diode D1, D3, and iD1, iD3 are linear to descend.
5. switch mode 5[t4, t5] [corresponding to accompanying drawing 7]
In the t4 moment, current i D1, iD3 drop to zero, and output rectifier diode D1, D3 end naturally.
6. switch mode 6[t5, t6] [corresponding to accompanying drawing 8]
The t5 moment, switching tube Q conducting, because the effect of leakage inductance Lk1, Lk2, current i D2, iD4 decrease speed are controlled, and have suppressed the reverse recovery of rectifier diode D2, D4.
7. switch mode 7[t6, t0] [corresponding to accompanying drawing 9]
In the t6 moment, the electric current that flows through switching tube Q rises to input current.Because there are remaining stored charge in diode D2, D4, current i D2, iD4 are reverse, and are reduced to zero.
As seen from the above description, the single switch double output booster converter of the present invention's proposition has following advantage:
1. this converter only needs an active switch and a magnetic element, realizes the dual output and the boosting inverter of converter, and circuit topological structure is succinct.
2. utilize the current transfer of the coupling inductance of input inductance and the branch road realization output rectifier diode that additional diode constitutes, the output rectifier diode turn-offs naturally, and the leakage inductance of coupling inductance has suppressed the reverse recovery of additional diode.
4. converter has suppressed the reverse recovery of output rectifier diode, and electromagnetic interference is little, and switching loss is low, and the conversion efficiency height has improved reliability.Can further improve switching frequency, improve power density of transform.
The difference of 5. converter input, output dividing potential drop capacitor's capacity can not influence all pressures of input, output dividing potential drop electric capacity.
Claims (1)
1. the composition of a single switch double output booster converter is, dividing potential drop electric capacity (C
D1), (C
D2) positive pole of circuit is connected in the first input inductance winding (N
1) end of the same name, the different name end of this input inductance winding divides two-way, the one road is connected in switching tube (Q) drain electrode, the source electrode of this switching tube (Q) is connected in the 3rd input inductance winding (N
3) end of the same name, the 3rd input inductance winding (N
3) the different name end be connected in dividing potential drop condenser network negative pole and form a loop; Another road is connected in the first diode (D
1) anode, this first diode (D
1) negative electrode be connected in the output filter capacitor (C of two forwards series connection
F1), (C
F2) positive pole of circuit, this output filter capacitor (C
F1), (C
F2) negative pole of circuit is connected in the 3rd diode (D
3) anode, this 3rd diode (D
3) negative electrode be connected switching tube (Q) source electrode and the 3rd input inductance winding (N
3) tie point on, and through the 3rd input inductance winding (N
3) to dividing potential drop electric capacity (C
D1), (C
D2) the circuit negative pole forms another loop, two output filter capacitor (C
F1), (C
F2) series connection point and two dividing potential drop electric capacity (C
D1), (C
D2) the series connection mid point link to each other, constitute the dual output circuit, be characterized in, at the first input inductance winding (N
1) and the first diode (D
1) series circuit on also and meet one and the first input inductance winding (N
1) the second input inductance winding (N that is coupled
2) and an additional diode (D
2) branch road that is in series, in like manner at the 3rd input inductance winding (N
3) and the 3rd diode (D
3) series circuit on also and meet one and the second input inductance winding (N
2) the 4th input inductance winding (N that is coupled
4) and another additional diode (D
4) branch road that is in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100413715A CN100358226C (en) | 2005-08-08 | 2005-08-08 | Single switch double output booster converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100413715A CN100358226C (en) | 2005-08-08 | 2005-08-08 | Single switch double output booster converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1734904A CN1734904A (en) | 2006-02-15 |
| CN100358226C true CN100358226C (en) | 2007-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100413715A Expired - Fee Related CN100358226C (en) | 2005-08-08 | 2005-08-08 | Single switch double output booster converter |
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| Country | Link |
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| CN (1) | CN100358226C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101454979B (en) * | 2006-05-29 | 2013-03-27 | 皇家飞利浦电子股份有限公司 | Switching circuit arrangement |
| CN101741259B (en) * | 2010-01-28 | 2012-02-22 | 南京航空航天大学 | Two-way DC converter |
| CN103618444B (en) * | 2013-11-15 | 2017-01-04 | 南京航空航天大学 | The two-tube booster converter of three winding coupling inductance ZVS/ZCS |
| CN103904892B (en) * | 2014-04-18 | 2017-01-25 | 南京航空航天大学 | Self-voltage-sharing two-tube high-gain converter and control method thereof |
| CN111987904A (en) * | 2020-08-06 | 2020-11-24 | 哈尔滨工程大学 | Non-isolated DC/DC converter |
| CN112713769B (en) * | 2020-12-29 | 2022-03-22 | 广东电网有限责任公司电力科学研究院 | Single-switch Boost three-level converter based on Boost formula |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59117459A (en) * | 1982-12-22 | 1984-07-06 | Hitachi Ltd | Switching circuit |
| JPH08317635A (en) * | 1995-05-15 | 1996-11-29 | Fanuc Ltd | Switching power-supply circuit |
| US20040240239A1 (en) * | 2003-05-28 | 2004-12-02 | Delta Electronics Inc. | Apparatus for protecting boost converter in abnormal operation |
| CN2706955Y (en) * | 2004-07-08 | 2005-06-29 | 浙江大学 | Boost type active staggered parallel soft switch DC-DC converter |
-
2005
- 2005-08-08 CN CNB2005100413715A patent/CN100358226C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59117459A (en) * | 1982-12-22 | 1984-07-06 | Hitachi Ltd | Switching circuit |
| JPH08317635A (en) * | 1995-05-15 | 1996-11-29 | Fanuc Ltd | Switching power-supply circuit |
| US20040240239A1 (en) * | 2003-05-28 | 2004-12-02 | Delta Electronics Inc. | Apparatus for protecting boost converter in abnormal operation |
| CN2706955Y (en) * | 2004-07-08 | 2005-06-29 | 浙江大学 | Boost type active staggered parallel soft switch DC-DC converter |
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| Publication number | Publication date |
|---|---|
| CN1734904A (en) | 2006-02-15 |
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