CN103618446A - Passive clamping parallel type boost converter with coupling inductors and switch capacitors - Google Patents

Passive clamping parallel type boost converter with coupling inductors and switch capacitors Download PDF

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Publication number
CN103618446A
CN103618446A CN201310688048.1A CN201310688048A CN103618446A CN 103618446 A CN103618446 A CN 103618446A CN 201310688048 A CN201310688048 A CN 201310688048A CN 103618446 A CN103618446 A CN 103618446A
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clamping
winding
diode
inductance
coupled inductance
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何良宗
李彤
周伟
曾涛
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Xiamen University
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Xiamen University
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Abstract

The invention provides a passive clamping parallel type boost converter with coupling inductors and switch capacitors. The passive clamping parallel type boost converter comprises two power switch tubes, two fly-wheel diodes, two switch capacitors, two output diodes, an output capacitor, two clamping diodes, two clamping capacitors and two three-winding coupling inductors. Zero current turning on of the power switch tubes is realized through leakage inductance of the two three-winding coupling inductors, and the falling rate of current in the diodes is controlled, so that the problem of reverse recovery of the diodes during switching off is solved. Due to a passive circuit consisting of the clamping diodes and the clamping capacitors, soft shut-off of the power switch tubes and lossless transferring of leakage inductance energy are realized; the clamping diodes are not connected in series to a power loop, so that the conductance loss of the diodes can be reduced; the clamping capacitors are staggered, so that current balance of two staggered branches is realized. Due to second windings and third windings of the two three-winding coupling inductors, high-gain output of the converter is realized; the whole converter is low in power loss and simple in structure.

Description

A kind of passive-clamp parallel connection type booster converter with coupling inductance and switching capacity
Technical field
The present invention relates to DC-DC converter technique field, relate in particular to a kind of passive-clamp parallel connection type booster converter with coupling inductance and switching capacity.
Background technology
Along with the growing tension of the energy, development new energy technology progressively becomes the focus of concern.It is high that the green energy resources such as fuel cell, photovoltaic solar, biomass energy have energy density, safety, clean, noiseless, features such as non-environmental-pollution and being favored.But because its electricity generation module output voltage is low, and common DC bus voltage is standing, fix on 200V or 400V, so need to insert the high-performance DC-DC converter of the low input current ripple of a high gain and high efficiency between these electricity generation modules and common DC bus.
Conventional crisscross parallel step-up DC-DC converter, comprise two power switch pipes, two inductance, two fly-wheel diodes, the drain electrode of the first power switch pipe is connected with the anode of the first fly-wheel diode and one end of the first inductance, the drain electrode of the second power switch pipe is connected with the anode of the second diode and one end of the second inductance, and the other end of the first inductance is connected with the other end of the second inductance.The gain of this crisscross parallel step-up DC-DC converter output voltage is less, the reverse recovery current of fly-wheel diode is larger, reverse recovery loss is larger, the voltage stress of power switch pipe is larger, power switch pipe is hard switching work, and switching loss is large, and two branch roads are in duty ratio not etc. in situation, output voltage not etc., thereby two not current-sharings of branch road.In recent years, for improving the voltage gain of converter, progressively develop two kinds of boosting modes, a kind of is the mode that adopts tandem tap electric capacity, the method a plurality of switching capacities of need to connecting are realized high-gain, and have current spike in charge circuit, electromagnetic interference is large, the more important thing is that output voltage is difficult for regulating; Another kind of mode is to adopt coupling inductance to boost, and under which, output diode voltage stress is higher, has affected the efficiency of converter, and need to increase extra absorbing circuit, and circuit is complicated.For solving soft switch problem, in succession studied some soft switch circuits, mainly contain two kinds: a kind of is by devices such as additional diode and passive inductance, electric capacity, to realize the soft switch of power switch pipe; Another kind is by devices such as additional diode and passive inductance, electric capacity, to realize the soft switch of power switch pipe.Although these two kinds of methods can realize the soft switch of power tube switching tube, additional circuit is complicated, and can not reduce the voltage stress of power switch pipe.
Summary of the invention
The main technical problem to be solved in the present invention is to provide a kind of power switch pipe zero current turning-on, high-gain output and low voltage stress, and realizes the booster type variator of soft shutoff and the branch current current-sharing of power switch pipe.
Technical solution of the present invention is: a kind of passive-clamp parallel connection type booster converter with coupling inductance and switching capacity, comprise power supply, two power tubes, two clamping diodes, two clamping capacitances (, two fly-wheel diodes, two switching capacities, two output diodes, an output capacitance and two three winding coupled inductance;
And the one end of the former limit winding of the two or three winding coupled inductance and the anode of power supply, one end of former limit winding that it is characterized in that the one or three winding coupled inductance is connected, and the other end of described the one or three winding coupled inductance is connected with one end of the first switching capacity with the drain electrode of the first power tube, the anode of the first clamping diode, one end of the negative electrode of the first clamping diode and the second clamping capacitance and the second fly-wheel diode anode be connected, the other end of the first switching capacity is connected with one end of the first secondary winding of the one or three winding coupled inductance, the other end of the first secondary winding of the one or three winding coupled inductance is connected with one end of the second secondary winding of the two or three winding coupled inductance, and the other end of the second secondary winding of the two or three winding coupled inductance is connected with the anode of the negative electrode of the first fly-wheel diode and the first output diode, the other end of the two or the three former limit of winding coupled inductance winding and the drain electrode of the second power switch pipe and the anode of the second clamping diode and second switch electric capacity one end be connected, the negative electrode of the second clamping diode is connected with one end of the first clamping capacitance and the anode of the first fly-wheel diode, the other end of second switch electric capacity is connected with one end of the first secondary winding of the two or three winding coupled inductance, the other end of the first secondary winding of the two or three winding coupled inductance is connected with one end of the second secondary winding of the one or three winding coupled inductance, the anode of the one or three other end of winding coupled inductance the second secondary winding and the negative electrode of the second fly-wheel diode and the second output diode is connected, the negative electrode of the second output diode is connected with the negative electrode of the first output diode and one end of output capacitance, the other end of output capacitance and the negative terminal of power supply, the source electrode of the first power switch pipe, the source electrode of the second power switch pipe, the first clamping capacitance and the second clamping capacitance link together jointly.
During work, utilize the leakage inductance of the one or three winding coupled inductance and the two or three winding coupled inductance to realize the soft shutoff of zero current turning-on and first and second two fly-wheel diodes of the first power switch pipe, the second power switch pipe; When the first power switch pipe and the second power switch pipe turn-off, due to the existence of the first clamping diode, the first clamping capacitance and the second clamping diode, the second clamping capacitance, the soft clamping of having realized respectively the second power switch pipe and the first power switch pipe turn-offs.Utilize the secondary winding of the one or three winding coupled inductance and the secondary winding of the two or three winding coupled inductance to realize the high-gain output of converter, utilize the first switching capacity, second switch electric capacity further to improve the voltage gain of converter and the voltage stress of reduction power device, simultaneously, the second clamping capacitance of each switch periods, the first clamping capacitance are collected the leakage inductance energy of the one or three winding coupled inductance, the two or three winding coupled inductance, and finally transfer to load, realize the harmless operation of passive clamp circuit.Because the first clamping capacitance, the second clamping capacitance are staggeredly placed at the second branch road (containing the first power switch pipe branch road), the first branch road (containing the second power switch pipe branch road), guaranteed that two subcircuits voltage gain in the situation that duty ratio does not wait equates, thereby realized current-sharing.
A kind of passive-clamp parallel connection type booster converter with coupling inductance and switching capacity provided by the invention, utilized the leakage inductance of the one or three winding coupled inductance and the two or three winding coupled inductance to realize the zero current turning-on of power switch pipe, and effectively control electric current fall off rate in diode, thereby solved the problem that switching tube oppositely recovers.The passive clamp circuit that utilizes clamping diode and clamping capacitance to form has been realized the soft shutoff of power switch pipe and the harmless transfer of leakage inductance energy, clamping diode is not connected on the loop that comprises power switch pipe, can reduce conduction loss, being staggered in two branch roads of passive clamp circuit, has effectively realized the current-sharing of two branch roads.Utilize two secondary windings of first coupling inductance and the two or three winding coupled inductance to realize the high-gain output of converter, utilize two switching capacities further to improve the voltage gain and the voltage stress that has reduced power device of converter, without extra power tube switch and inductance element, attachment element is few, simple in structure, it is convenient to control, and noenergy losser in circuit can improve the efficiency of booster type variator.
Accompanying drawing explanation
Fig. 1 is a kind of passive-clamp parallel connection type boost converter circuit figure with coupling inductance and switching capacity.
Fig. 2 is a kind of passive-clamp parallel connection type booster converter equivalent electric circuit with coupling inductance and switching capacity.
Fig. 3 is each switch mode equivalent circuit diagram of a kind of passive-clamp parallel connection type booster converter with coupling inductance and switching capacity.
Fig. 4 is a kind of passive-clamp parallel connection type booster converter key waveforms figure with coupling inductance and switching capacity.
Embodiment
Below by the present invention will be further described in conjunction with the accompanying drawings and embodiments.
Referring to Fig. 1, a kind of passive-clamp parallel connection type booster converter with coupling inductance and switching capacity provided by the invention, comprises two power tube S 1, S 2, two clamping diode D c1, D c2, two clamping capacitance C c1, C c2, two sustained diode f1, D f2, two switching capacity C f1, C f2, two output diode D o1, D o2, an output capacitance C owith two three winding coupled inductance, it is characterized in that the former limit winding L of the one or three winding coupled inductance 1pone end and the former limit winding L of the two or three winding coupled inductance 2pone end and power supply V inanode be connected, the former limit winding L of the one or three winding coupled inductance 1pthe other end with the first power tube S 1drain electrode, the first clamping diode D c1anode and the first switching capacity C f1one end be connected; The first clamping diode D c1negative electrode and the second clamping capacitance C c2one end and the D of the second fly-wheel diode f2anode be connected, the first switching capacity C f1the other end and the first secondary winding L of the one or three winding coupled inductance 1s1one end be connected, the first secondary winding L of the one or three winding coupled inductance 1s1the other end and the second secondary winding L of the two or three winding coupled inductance 2s2one end be connected, the second secondary winding L of the two or three winding coupled inductance 2s2the other end and the first sustained diode f1negative electrode and the first output diode D o1anode be connected; The two or the three former limit of winding coupled inductance winding L 2pthe other end and the second power switch tube S 2drain electrode and the second clamping diode D c2anode and the C of second switch electric capacity f2one end be connected, the second clamping diode D c2negative electrode and the first clamping capacitance C c1one end and the first sustained diode f1anode be connected, second switch capacitor C f2the other end and the first secondary winding L of the two or three winding coupled inductance 2s1one end be connected, the first secondary winding L of the two or three winding coupled inductance 2s1the other end and the second secondary winding L of the one or three winding coupled inductance 1s2one end be connected, the one or three winding coupled inductance the second secondary winding L 1s2the other end and the second sustained diode f2negative electrode and the second output diode D o2anode be connected, the second output diode D o2negative electrode and the first output diode D o1negative electrode and output capacitance C oone end be connected, output capacitance C othe other end and power supply V innegative terminal, the first power switch tube S 1source electrode, the second power switch tube S 2source electrode, the first clamping capacitance C c1and the second clamping capacitance C c2jointly link together.
The former limit L of the one or three above-mentioned winding coupled inductance 1pwith power supply V inthe link of anode and the one or three winding coupled inductance secondary the second winding L 1s1with the first switching capacity C f1link and the one or three winding coupled inductance the second secondary winding L 1s2with the second sustained diode f2the link of negative electrode is the Same Name of Ends of the one or three winding coupled inductance; The former limit winding L of the two or three winding coupled inductance 2pwith power supply V inthe first secondary winding L of the link of anode and the two or three winding coupled inductance 2s1with second switch capacitor C f2link and the second secondary winding L of the two or three winding coupled inductance 2s2with the first sustained diode f1the link of negative electrode is the Same Name of Ends of the two or three winding coupled inductance.
As schematically shown in Figure 2, the leakage inductance reduction of first and second coupling inductance secondary, to former limit, is used respectively L to described a kind of passive-clamp parallel connection type booster converter equivalent electric circuit with coupling inductance and switching capacity k1, L k2represent, converter has 12 operation modes, as shown in Figure 3.Due to the symmetry of circuit, only take the first six commutation course to be analyzed as follows as example:
Mode 1[t 0t 1]: power switch tube S 1, S 2in opening state, output diode D o1, D o2all reverse bias, clamping diode D c1, D c2and sustained diode f1, D f2in off state, two three winding coupled inductance L 1p, L 2pand leakage inductance L separately k1, L k2in being transfused to the linear-charging of voltage.
Mode 2[t 1t 2]: at t 1constantly, S 1turn-off, the one or three winding coupled inductance primary current is to S 1drain-source electric capacity linear-charging in parallel.The first clamping diode D c1reverse voltage reduce and S 1drain-source voltage raise.
Mode 3[t 2t 3]: at t 2constantly, the first clamper tube D c1oppositely pressure drop is down to zero and is started conducting, and the primary current of the one or three winding coupled inductance is to the second clamping capacitance C c2charging, the first power tube S 1still turn-off, and its drain-source voltage is by the second clamping capacitance C c2pincers is put, the one or three winding coupled inductance leakage inductance L k1in energy transfer to the second clamping capacitance C c2in.
Mode 4[t 3t 4]: at t 3constantly, the first output diode D o1start conducting, the first switching capacity C f1in energy start to shift to load.While the second sustained diode f2conducting, the second clamping capacitance C c2in energy transfer to second switch capacitor C f2in.
Mode 5[t 4t 5]: at t 4constantly, the first clamping diode D c1turn-off, because cut-off current fall off rate is subject to the one or three winding coupled inductance leakage inductance L k1control, its turn-off reversal is recovered problem and is not existed, and now flows into the second clamping capacitance C c2electric current be zero, the first switching capacity C f1in energy continue transferring load.
Mode 6[t 5t 6]: at t 5constantly, S 1open-minded, due to the two or three winding coupled inductance leakage inductance L k1existence, S 1zero current turning-on.
Key waveforms figure when Fig. 4 works for this converter.
Referring to Fig. 2, the implementation procedure of current-sharing is: establish first and second power switch tube S 1, S 2conducting duty is respectively than being D 1, D 2, two secondary windings of two coupling inductances are all N to the turn ratio of former limit winding separately, the voltage gain of the first branch road 1 is:
V o 1 = V in + V L 1 p + V Cf 1 + V L 1 s 1 + V L 2 s 2 = ( ( ND 2 1 - D 2 + 1 1 - D 2 + N ) + ( 1 + N ) + ( 1 + N ) D 1 1 - D 1 ) V in = ( 1 + N ) ( 1 1 - D 1 + 1 1 - D 2 ) - - - ( 1 )
The voltage gain that equally, can obtain the second branch road 2 is:
V o 2 = V in + V L 2 p + V Cf 2 + V L 2 s 1 + V L 1 s 2 = ( ( ND 1 1 - D 1 + 1 1 - D 1 + N ) + ( 1 + N ) + ( 1 + N ) D 2 1 - D 2 ) V in = ( 1 + N ) ( 1 1 - D 2 + 1 1 - D 1 ) - - - ( 2 )
Visible V o1=V o2so two branch roads still can not realized from current-sharing in the situation that duty ratio does not wait separately.
Above embodiment is only used for the explanation principle of the invention, not the only execution mode of the present invention.Above-described embodiment should not be considered as limiting the scope of the invention.Those skilled in the art, when reading and having understood aforementioned detailed description, can modify and change.Concrete protection range should be as the criterion with claims.

Claims (1)

1. with a passive-clamp parallel connection type booster converter for coupling inductance and switching capacity, comprise power supply, two power tube (S 1, S 2), two clamping diode (D c1, D c2), two clamping capacitance (C c1, C c2), two fly-wheel diode (D f1, D f2), two switching capacity (C f1, C f2), two output diode (D o1, D o2), an output capacitance (C o) and two three winding coupled inductance;
The former limit winding (L that it is characterized in that the one or three winding coupled inductance 1p) one end and the former limit winding (L of the two or three winding coupled inductance 2p) one end and power supply (V in) anode be connected, the other end of described the one or three winding coupled inductance with the first power tube (S 1) drain electrode, the first clamping diode (D c1) anode and the first switching capacity (C f1) one end be connected; The first clamping diode (D c1) negative electrode and the second clamping capacitance (C c2) one end and the (D of the second fly-wheel diode f2) anode be connected, the first switching capacity (C f1) the other end and the first secondary winding (L of the one or three winding coupled inductance 1s1) one end be connected, the first secondary winding (L of the one or three winding coupled inductance 1s1) the other end and the second secondary winding (L of the two or three winding coupled inductance 2s2) one end be connected, the second secondary winding (L of the two or three winding coupled inductance 2s2) the other end and the first fly-wheel diode (D f1) negative electrode and the first output diode (D o1) anode be connected; The two or the three former limit of winding coupled inductance winding (L 2p) the other end and the second power switch pipe (S 2) drain electrode and the second clamping diode (D c2) anode and the (C of second switch electric capacity f2) one end be connected, the second clamping diode (D c2) negative electrode and the first clamping capacitance (C c1) one end and the first fly-wheel diode (D f1) anode be connected, second switch electric capacity (C f2) the other end and the first secondary winding (L of the two or three winding coupled inductance 2s1) one end be connected, the first secondary winding (L of the two or three winding coupled inductance 2s1) the other end and the second secondary winding (L of the one or three winding coupled inductance 1s2) one end be connected, the one or three winding coupled inductance the second secondary winding (L 1s2) the other end and the second fly-wheel diode (D f2) negative electrode and the second output diode (D o2) anode be connected, the second output diode (D o2) negative electrode and the first output diode (D o1) negative electrode and output capacitance (C o) one end be connected, output capacitance (C o) the other end and power supply (V in) negative terminal, the first power switch pipe (S 1) source electrode, the second power switch pipe (S 2) source electrode, the first clamping capacitance (C c1) and the second clamping capacitance (C c2) jointly link together.
CN201310688048.1A 2013-12-16 2013-12-16 Passive clamping parallel type boost converter with coupling inductors and switch capacitors Pending CN103618446A (en)

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CN103887977A (en) * 2014-04-17 2014-06-25 南京航空航天大学 Switched capacitor and multi-winding transformer formed high-gain high-frequency rectification isolation converter
CN104113207A (en) * 2014-07-02 2014-10-22 三峡大学 Interleaved parallel Boost converter including zero voltage turn-off auxiliary circuit
CN104283419A (en) * 2014-07-29 2015-01-14 华南理工大学 Secondary type high-gain boosting converter with switched capacitors and coupled inductor
CN104506041A (en) * 2014-12-26 2015-04-08 杭州禾迈电力电子技术有限公司 High-gain passive lossless clamped inverter comprising three-winding built-in transformer structure
CN105896977A (en) * 2016-04-07 2016-08-24 厦门大学 Soft switch of interlaced parallel DC-DC converter
CN107124102A (en) * 2017-04-18 2017-09-01 安徽工业大学 There is one kind self-balancing ability, wide Duty ratio control to interlock high-gain DC/DC converters
CN109697335A (en) * 2019-01-17 2019-04-30 广东电网有限责任公司 For transformer from leakage inductance calculation method, device, equipment and storage medium

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103887977A (en) * 2014-04-17 2014-06-25 南京航空航天大学 Switched capacitor and multi-winding transformer formed high-gain high-frequency rectification isolation converter
CN104113207A (en) * 2014-07-02 2014-10-22 三峡大学 Interleaved parallel Boost converter including zero voltage turn-off auxiliary circuit
CN104283419A (en) * 2014-07-29 2015-01-14 华南理工大学 Secondary type high-gain boosting converter with switched capacitors and coupled inductor
CN104506041A (en) * 2014-12-26 2015-04-08 杭州禾迈电力电子技术有限公司 High-gain passive lossless clamped inverter comprising three-winding built-in transformer structure
CN105896977A (en) * 2016-04-07 2016-08-24 厦门大学 Soft switch of interlaced parallel DC-DC converter
CN105896977B (en) * 2016-04-07 2018-09-11 厦门大学 A kind of Sofe Switch of crisscross parallel type DC-DC converter
CN107124102A (en) * 2017-04-18 2017-09-01 安徽工业大学 There is one kind self-balancing ability, wide Duty ratio control to interlock high-gain DC/DC converters
CN107124102B (en) * 2017-04-18 2018-04-10 安徽工业大学 There is one kind self-balancing ability, wide Duty ratio control to interlock high-gain DC/DC converters
CN109697335A (en) * 2019-01-17 2019-04-30 广东电网有限责任公司 For transformer from leakage inductance calculation method, device, equipment and storage medium
CN109697335B (en) * 2019-01-17 2023-01-20 广东电网有限责任公司 Self-leakage inductance calculation method, device and equipment for transformer and storage medium

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Application publication date: 20140305