CN203645540U - A high-efficiency high-gain DC-DC converter with coupling inductors - Google Patents

A high-efficiency high-gain DC-DC converter with coupling inductors Download PDF

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Publication number
CN203645540U
CN203645540U CN201320719310.XU CN201320719310U CN203645540U CN 203645540 U CN203645540 U CN 203645540U CN 201320719310 U CN201320719310 U CN 201320719310U CN 203645540 U CN203645540 U CN 203645540U
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China
Prior art keywords
diode
inductance
electric capacity
capacitor
converter
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Withdrawn - After Issue
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CN201320719310.XU
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Chinese (zh)
Inventor
张波
付坚
丘东元
肖文勋
黄子田
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South China University of Technology SCUT
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South China University of Technology SCUT
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Abstract

The utility model provides a high-efficiency high-gain DC_DC converter with coupling inductors. The high-efficiency high-gain DC-DC converter with the coupling inductors comprises an input stage Boost converter with a voltage-multiplying output and an output stage Boost converter with the coupling inductors. The input stage Boost converter with the voltage-multiplying output is composed of a direct current power supply, a switch tube, a first diode, a second diode, a fourth diode, a fifth diode, a first inductor, a second inductor, a first capacitor, a third capacitor and a fourth capacitor. The output stage Boost converter with the coupling inductors is composed of a first capacitor, a switch tube, a third diode, a second capacitor, a fifth capacitor and a sixth capacitor, the coupling inductors and a load. The second inductor is introduced into the output stage Boost converter with the coupling inductors as a resonance inductor. The output stage Boost converter with the coupling inductors employs the coupling inductors, so that zero-current switch-on of the switch tube is realized; and simultaneously, the zero-current switch-off of each diode is realized. The converter is extremely high in gain, and the gain can reach 2(2+N)/(1-D)<2>. A voltage stress of the switch tube is very low, and the voltage stress is only 1/(2+N) of an output voltage.

Description

With the high efficiency high-gain DC-DC converter of coupling inductance
Technical field
The utility model relates to high-gain non-isolation type DC-DC converter field, is specifically related to a kind of high efficiency high-gain DC-DC converter with coupling inductance.
Background technology
In recent years, high-gain non-isolation type DC-DC converter is widely used in UPS, distributed photovoltaic power generation and battery energy storage system.At present, high-gain non-isolation type DC-DC converter mainly contains switching capacity type, switched inductors type, realizes the rising of voltage, but be difficult to realize soft switch by increasing switching capacity or inductance, has reduced the efficiency of converter.Quadratic form Boost converter can be realized high-gain, is subject to equally very large favor, but the voltage stress of switching tube is very large, has limited the further raising of voltage.In addition, also can realize very high gain by coupling inductance, if but the leakage inductance of coupling inductance do not controlled, can increase voltage stress and the energy loss of switching tube.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, proposes a kind of high efficiency high-gain DC-DC converter converter with coupling inductance.
The technical solution adopted in the utility model is: with the high efficiency high-gain DC-DC converter converter of coupling inductance, comprise the input stage Boost converter of the multiplication of voltage output forming with DC power supply, switching tube, the first diode, the second diode, the 4th diode, the 5th diode, the first inductance, the second inductance, the first electric capacity, the 3rd electric capacity and the 4th electric capacity; The output stage Boost converter with coupling inductance forming with the first electric capacity, switching tube, the 3rd diode, the 6th diode, the 7th diode, the second electric capacity, the 5th electric capacity, the 6th electric capacity, coupling inductance and load.
In described converter, one end of the first inductance is connected with the positive pole of direct voltage, the negative pole of the 3rd electric capacity simultaneously, the other end of the first inductance is connected with the anode of the 4th diode, the anode of the second diode, one end of the second inductance simultaneously, the other end of the second inductance is connected with the negative pole of the 4th electric capacity, the anodal of the 3rd electric capacity is connected with the negative electrode of the 4th diode, the anode of the 5th diode simultaneously, and the positive pole of the 4th electric capacity is connected with the negative electrode of the 5th diode, the positive pole of the first diode, one end while on the former limit of coupling inductance and the negative electrode of the first diode, the positive pole of the first electric capacity, the negative pole of the 5th electric capacity is connected, the other end while on the former limit of coupling inductance and the non-same polarity of secondary, the drain electrode of switching tube, the anode of the 6th diode is connected, the other end of the secondary of coupling inductance is connected with the negative pole of the second electric capacity, the anodal while of the 5th electric capacity and the negative electrode of the 6th diode, the anode of the 7th diode is connected, the negative electrode of the positive pole of the second electric capacity and the 7th diode, the anode of the 3rd diode is connected, the negative electrode while of the 3rd diode and the positive pole of the 6th electric capacity, one end of load is connected, the other end of load and the negative pole of DC power supply, the negative electrode of the first electric capacity, the source electrode of switching tube, the negative pole of the 6th electric capacity is connected.
In the time that switching tube is opened, DC power supply is given the first induction charging, and DC power supply and the 3rd electric capacity are given the 4th capacitor charging jointly, and the first electric capacity is to the former limit charging of coupling inductance, the first electric capacity and the 5th electric capacity are given the second capacitor charging, simultaneously the 6th electric capacity powering load jointly; In the time that switching tube turn-offs, the first inductance is given the 3rd capacitor charging, DC power supply, the first inductance and the 4th electric capacity are given the first capacitor charging jointly, the 5th capacitor charging is given on the former limit of coupling inductance, and the former limit of DC power supply, the first inductance, the 4th electric capacity, coupling inductance, secondary, the second electric capacity are given the 6th electric capacity and load supplying jointly simultaneously.
The mode of operation of converter comprises that the electric current of the first inductance and the electric current of coupling inductance all work in continuous conduction mode (L 1-C-CCM pattern), the current work of the first inductance in continuous conduction mode and the current work of coupling inductance in discontinuous conduction mode (L 1-CCM-C-DCM pattern).
Compared with prior art, the advantage the utlity model has is: gain is 2 (2+N)/(1-D) 2, and the voltage stress of switching tube is low, is only 1/ (2+N) of output voltage, realize the zero current turning-on of switching tube, improve the efficiency of converter, realized the zero-current switching of each diode simultaneously, well solved the reverse-recovery problems of each diode.Compare with switched inductors type with switching capacity type, realized soft switch, improved efficiency; Compared with quadratic form Boost converter, reduce the stress of switching tube; Compared with existing coupling inductance, well utilize leakage inductance, further improve voltage, reduce the stress of switching tube, realize soft switch.
Brief description of the drawings
Fig. 1 is the high efficiency high-gain DC-DC transformer configuration figure with coupling inductance of the present utility model;
Fig. 2 is the equivalent circuit diagram of the high efficiency high-gain DC-DC converter with coupling inductance shown in Fig. 1;
Fig. 3 is that the high efficiency high-gain DC-DC converter with coupling inductance shown in Fig. 1 works in L 1crucial current waveform figure under-C-CCM pattern;
Fig. 4 a~Fig. 4 f is respectively that the high efficiency high-gain DC-DC converter with coupling inductance shown in Fig. 1 works in L 1six kinds of operation modes under-C-CCM pattern.
Embodiment
For further setting forth content of the present utility model and feature, below in conjunction with accompanying drawing, specific embodiments of the present utility model is specifically described.But enforcement of the present utility model is not limited to this.
With reference to figure 1, the high efficiency high-gain DC-DC converter with coupling inductance of the present utility model, with DC power supply V in, switching tube Q, the first diode D 1, the second diode D 2, the 4th diode D m1, the 5th diode D m2, the first inductance L 1, the second inductance L r, the first capacitor C 1, the 3rd capacitor C m1with the 4th capacitor C m2the input stage Boost converter of the multiplication of voltage output forming; With the first capacitor C 1, switching tube Q, the 3rd diode D o, the 6th diode D c, the 7th diode D r, the second capacitor C 2, the 5th capacitor C c, the 6th capacitor C o, coupling inductance (n 1: n 2) and load R form the output stage Boost converter with coupling inductance.Wherein, the first inductance L 1one end simultaneously and direct voltage V inpositive pole, the 3rd capacitor C m1negative pole be connected, the first inductance L 1the other end simultaneously and the 4th diode D m1anode, the second diode D 2anode, the second inductance L rone end be connected, the second inductance L rthe other end and the 4th capacitor C m2negative pole be connected, the 3rd capacitor C m1anodal simultaneously and the 4th diode D m1negative electrode, the 5th diode D m2anode be connected, the 4th capacitor C m2positive pole and the 5th diode D m2negative electrode, the first diode D 1positive pole be connected; Coupling inductance (n 1: n 2) former limit n 1one end simultaneously and the first diode D 1negative electrode, the first capacitor C 1positive pole, the 5th capacitor C cnegative pole be connected, coupling inductance (n 1: n 2) former limit n 1the other end simultaneously and secondary n 2non-same polarity, the drain electrode of switching tube Q, the 6th diode D canode be connected, coupling inductance (n 1: n 2) secondary n 2the other end and the second capacitor C 2negative pole be connected, the 5th capacitor C canodal simultaneously and the 6th diode D cnegative electrode, the 7th diode D ranode be connected, the second capacitor C 2positive pole and the 7th diode D rnegative electrode, the 3rd diode D oanode be connected, the 3rd diode D onegative electrode simultaneously and the 6th capacitor C opositive pole, one end of load R be connected, the other end of load R and DC power supply V innegative pole, the first capacitor C 1negative electrode, the source electrode of switching tube Q, the 6th capacitor C onegative pole be connected.
Taking Fig. 1 as main circuit structure, taking equivalent electric circuit shown in Fig. 2 as object, narrate specific works principle of the present utility model in conjunction with Fig. 3~Fig. 4 below.Be operated in L with converter 1-C-CCM pattern is that example describes:
T in Fig. 3 0-t 1in the stage, switching tube Q is open-minded, current path as shown in Fig. 4 a, DC power supply V inby switching tube Q and the second diode D 2give the first inductance L 1charging, DC power supply V inwith the 3rd capacitor C m1through switching tube Q and the 5th diode D m2, the second diode D 2common the 4th capacitor C of giving m2charging, the second inductance L rthere is resonance, the first capacitor C 1through switching tube Q to magnetizing inductance L mwith former limit leakage inductance L k1charging, magnetizing inductance L mthrough secondary winding n 2induction, and the first capacitor C 1, the 5th capacitor C cthrough switching tube Q and the 7th diode D rcommon second capacitor C of giving 2charging, simultaneously the 6th capacitor C ogive load R power supply.T=t 1time, the second inductance L rcurrent i lrreduce to zero.
T in Fig. 3 1-t 2stage, switching tube Q continue open-minded, current path as shown in Figure 4 b, DC power supply V inby switching tube Q and the second diode D 2continue to the first inductance L 1charging, the first capacitor C 1continue to magnetizing inductance L through switching tube Q mwith former limit leakage inductance L k1charging, magnetizing inductance L mthrough secondary winding n 2induction, and the first capacitor C 1, the 5th capacitor C cthrough switching tube Q and the 7th diode D rcontinue common to the second capacitor C 2charging, simultaneously the 6th capacitor C ocontinue to power to load R.
T in Fig. 3 2-t 3stage, switching tube Q turn-off, current path as shown in Fig. 4 c, the first inductance L 1through the 4th diode D m1give the 3rd capacitor C m1charging, DC power supply V in, the first inductance L 1with the 4th capacitor C m2through the first diode D 1give the first capacitor C 1charging, former limit leakage inductance L k1through the 6th diode D cgive the 5th capacitor C ccharging, secondary leakage inductance L k2through the 6th diode D c, the 7th diode D rgive the second capacitor C 2charging, the 6th capacitor C ocontinue to power to load R.T=t 3time, the current i of secondary leakage inductance lk2reduce to zero.
T in Fig. 3 3-t 4stage, switching tube Q turn-off, current path as shown in Fig. 4 d, the first inductance L 1through the 4th diode D m1continue to the 3rd capacitor C m1charging, DC power supply V in, the first inductance L 1with the 4th capacitor C m2through the first diode D 1continue to the first capacitor C 1charging, former limit leakage inductance L k1through the 6th diode D ccontinue to the 5th capacitor C ccharging, magnetizing inductance L mthrough secondary winding n 2induction, and magnetizing inductance L m, the first capacitor C 1, the second capacitor C 2through the 3rd diode D ocommon the 6th capacitor C of giving ocharge with load R.T=t 4time, the first inductance L 1current i l1with the second inductance L rcurrent i lrequate former limit leakage inductance L k1current i lkwith secondary leakage inductance L k2current i lk2electric current equate.
T in Fig. 3 4-t 5stage, switching tube Q turn-off, current path as shown in Fig. 4 e, DC power supply V in, the first inductance L 1, the second inductance L rwith the 4th capacitor C m2through the first diode D 1common first capacitor C of giving 1charging, simultaneously DC power supply V in, the first inductance L 1, the second inductance L r, the 4th capacitor C m2, magnetizing inductance L m, magnetizing inductance L mthrough secondary winding n 2induction, the second capacitor C 2through the 3rd diode D ocommon the 6th capacitor C of giving opower with load R.
T in Fig. 3 5-t 6in the stage, switching tube Q is open-minded, and due to the current-clamp of the second inductance L r and coupling inductance (n1:n2), making the electric current of opening of switching tube is 0, has improved the efficiency of converter.Current path as shown in Fig. 4 f, DC power supply V inthrough switching tube Q and the second diode D 2give the first inductance L 1charging, DC power supply V in, the first inductance L 1, the second inductance L rwith the 4th capacitor C m2through the first diode D 1give the first capacitor C 1, the first capacitor C 1through switching tube Q to magnetizing inductance L mwith former limit leakage inductance L k1charging, the first capacitor C 1, magnetizing inductance L m, magnetizing inductance L mthrough secondary winding n 2induction, the second capacitor C 2through the 3rd diode D ocommon the 6th capacitor C of giving ocharge with load R.T=t 6time, the second inductance L rcurrent i lrwith secondary leakage inductance L k2current i lk2reduce to zero.

Claims (2)

1. the high efficiency high-gain DC-DC converter with coupling inductance, is characterized in that comprising: with DC power supply (V in), switching tube (Q), the first diode (D 1), the second diode (D 2), the 4th diode (D m1), the 5th diode (D m2), the first inductance (L 1), the second inductance (L r), the first electric capacity (C 1), the 3rd electric capacity (C m1) and the 4th electric capacity (C m2) the input stage Boost converter of the multiplication of voltage output that forms; With the first electric capacity (C 1), switching tube (Q), the 3rd diode (D o), the 6th diode (D c), the 7th diode (D r), the second electric capacity (C 2), the 5th electric capacity (C c), the 6th electric capacity (C o), coupling inductance (n 1: n 2) and load (R) form the output stage Boost converter with coupling inductance.
2. the high efficiency high-gain DC-DC converter with coupling inductance according to claim 1, is characterized in that: the first inductance (L 1) one end simultaneously and direct voltage (V in) positive pole, the 3rd electric capacity (C m1) negative pole be connected, the first inductance (L 1) the other end simultaneously and the 4th diode (D m1) anode, the second diode (D 2) anode, the second inductance (L r) one end be connected, the second inductance (L r) the other end and the 4th electric capacity (C m2) negative pole be connected, the 3rd electric capacity (C m1) anodal simultaneously and the 4th diode (D m1) negative electrode, the 5th diode (D m2) anode be connected, the 4th electric capacity (C m2) positive pole and the 5th diode (D m2) negative electrode, the first diode (D 1) positive pole be connected; Coupling inductance (n 1: n 2) former limit (n 1) one end simultaneously and the first diode (D 1) negative electrode, the first electric capacity (C 1) positive pole, the 5th electric capacity (C c) negative pole be connected, coupling inductance (n 1: n 2) former limit (n 1) the other end simultaneously and secondary (n 2) non-same polarity, the drain electrode of switching tube (Q), the 6th diode (D c) anode be connected, coupling inductance (n 1: n 2) secondary (n 2) the other end and the second electric capacity (C 2) negative pole be connected, the 5th electric capacity (C c) anodal simultaneously and the 6th diode (D c) negative electrode, the 7th diode (D r) anode be connected, the second electric capacity (C 2) positive pole and the 7th diode (D r) negative electrode, the 3rd diode (D o) anode be connected, the 3rd diode (D o) negative electrode simultaneously and the 6th electric capacity (C o) positive pole, one end of load (R) be connected, the other end of load (R) and DC power supply (V in) negative pole, the first electric capacity (C 1) negative electrode, the source electrode of switching tube (Q), the 6th electric capacity (C o) negative pole be connected.
CN201320719310.XU 2013-11-14 2013-11-14 A high-efficiency high-gain DC-DC converter with coupling inductors Withdrawn - After Issue CN203645540U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103633838A (en) * 2013-11-14 2014-03-12 华南理工大学 High-efficiency high-gain DC-DC (Direct Current to Direct Current) converter with coupling inductor
CN108429452A (en) * 2018-03-13 2018-08-21 东南大学 A kind of photovoltaic system quadratic form is booted DC-DC converter more
CN108599560A (en) * 2018-05-11 2018-09-28 东南大学 More bootstrapping cascade connection type DC-DC converters of two capacitor-clampeds of photovoltaic system
CN109713896A (en) * 2019-01-04 2019-05-03 国网山东省电力公司淄博供电公司 High-gain boost converter and its control method with inverse ratio square characteristic

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103633838A (en) * 2013-11-14 2014-03-12 华南理工大学 High-efficiency high-gain DC-DC (Direct Current to Direct Current) converter with coupling inductor
CN103633838B (en) * 2013-11-14 2016-04-13 华南理工大学 With the High-efficiency high-gain DC-DC converter of coupling inductance
CN108429452A (en) * 2018-03-13 2018-08-21 东南大学 A kind of photovoltaic system quadratic form is booted DC-DC converter more
CN108599560A (en) * 2018-05-11 2018-09-28 东南大学 More bootstrapping cascade connection type DC-DC converters of two capacitor-clampeds of photovoltaic system
CN109713896A (en) * 2019-01-04 2019-05-03 国网山东省电力公司淄博供电公司 High-gain boost converter and its control method with inverse ratio square characteristic

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AV01 Patent right actively abandoned

Granted publication date: 20140611

Effective date of abandoning: 20160413

C25 Abandonment of patent right or utility model to avoid double patenting