CN104201894A - Voltage-multiplying high frequency rectification isolated transformer based on switched capacitors - Google Patents
Voltage-multiplying high frequency rectification isolated transformer based on switched capacitors Download PDFInfo
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- CN104201894A CN104201894A CN201410485737.7A CN201410485737A CN104201894A CN 104201894 A CN104201894 A CN 104201894A CN 201410485737 A CN201410485737 A CN 201410485737A CN 104201894 A CN104201894 A CN 104201894A
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- transformer
- circuit
- former limit
- voltage
- diode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a voltage-multiplying high frequency rectification isolated transformer based on switched capacitors and belongs to the technical field of power electronic converters. The voltage-multiplying high frequency rectification isolated transformer comprises a primary circuit, a transformer and a rectifier circuit; the rectifier circuit is composed of two diodes, two switch tubes, two auxiliary capacitors, two output filter capacitors, a high-frequency inductor and a load. The high-frequency inductor and the switch tubes impart controllable boosting and rectifying capacities to the rectifier circuit, and the auxiliary capacitors form a switched capacitor circuit so that the boosting capacity of the rectifier circuit is improved. The voltage-multiplying high frequency rectification isolated transformer has the advantages that the rectifier circuit is imparted the high boosting capacity, soft on and off of all switch tubes is achieved, switching loss is effectively reduced, switching efficiency is improved, and the converter is especially suitable for efficient high-gain isolated boosting direct-current power conversions.
Description
Technical field
The present invention relates to a kind of many multiplication of voltages high-gain high-frequency rectification isolated converter, belong to converters technical field, especially belong to isolated DC-direct current energy converter technique field.
Background technology
In the application of the technical fields such as renewable energy power generation, Aeronautics and Astronautics, automobile and medical treatment, for the purpose of safety and in order to meet the demand of voltage, conventionally need to adopt isolation boosting DC converter.How to promote isolated converter voltage gain, to reduce the voltage stress of converter device used and realize high efficiency power conversion be the Important Problems that this technical field is paid close attention to always.
Traditional isolated DC transducer is realized various boost functions by adjusting the no-load voltage ratio of transformer, but, the no-load voltage ratio that transformer is adjusted in simple dependence realizes boosting and has following problem: the voltage stress of switching device is high, and particularly the voltage stress of converter secondary rectifier diode is far above output voltage; Transformer leakage inductance increases, and causes due to voltage spikes and the concussion of switching device, further aggravated switching device stress, reduced reliability and efficiency.In addition, traditional isolated DC transducer can not be realized the soft switch of all switching devices, particularly transformer secondary device conventionally, has affected greatly the efficiency of converter.
Current mode isolated converter is one of Typical solutions of isolation boosting converter, as accompanying drawing 1, this scheme is placed in booster circuit in the former limit circuit of isolated converter, duty ratio by by-pass cock pipe can realize isolation boosting function, this scheme can effectively reduce the number of turn of Transformer Winding, and rectifier diode is directly output voltage clamp, voltage stress is lower.Yet, its subject matter is that the voltage stress of former limit switching tube is too high, and when particularly switching tube turn-offs, transformer leakage inductance etc. can cause great due to voltage spikes, has a strong impact on the normal operation of converter, therefore must add suitable active or passive snubber, cause circuit complicated.In addition, although this circuit arrangement can be realized, boost, boost capability is limited, and switching tube can not realize soft switch, and conversion efficiency is also affected.
Document " Chuan Yao; Xinbo Ruan; Xuehua Wang; Chi K.Tse.Isolated Buck-Boost DC/DC Converters Suitable for Wide Input-Voltage Range[J] .IEEE Transactions on Power Electronics; 2011; 26 (9): 2599-2613. " non-isolation boosting circuit is placed in to the secondary of isolated buck converter, after being connected to rectification circuit output end, with this, realize isolation boosting function.The subject matter of this scheme is that the rectification circuit of transformer secondary, non-isolation boosting circuit etc. are all hard switchings, and need to be through two stage power conversion from being input to output, and this is the whole efficiency of the converter of loss greatly all.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, for isolation boosting power conversion occasion provides a kind of many multiplication of voltages high-frequency rectification isolated converter based on switching capacity.
The object of the invention is to be achieved through the following technical solutions:
Described many multiplication of voltages high-frequency rectification isolated converter based on switching capacity consists of former limit circuit (10), transformer (T) and rectification circuit (20), and wherein transformer (T) comprises a secondary winding (N
s) and a former limit winding (N
p), rectification circuit (20) is by high-frequency inductor (L
h), the first switching tube (S
1), second switch pipe (S
2), the first auxiliary capacitor (C
a1), the second auxiliary capacitor (C
a2), the first diode (D
1), the second diode (D
2), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2) and load (R
o) form; Described transformer (T) secondary winding (N
s) one end be connected in high-frequency inductor (L
h) one end, high-frequency inductor (L
h) the other end be connected in the first auxiliary capacitor (C
a1) one end, the first auxiliary capacitor (C
a1) the other end be connected in the first switching tube (S
1) drain electrode, second switch pipe (S
2) source electrode and the second auxiliary capacitor (C
a2) one end, the first switching tube (S
1) source electrode be connected in the first output filter capacitor (C
o1) one end, load (R
o) one end and transformer (T) secondary winding (N
s) the other end, second switch pipe (S
2) drain electrode be connected in the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) one end and the first diode (D
1) anode, the second auxiliary capacitor (C
a2) the other end be connected in the first diode (D
1) negative electrode and the second diode (D
2) anode, the second diode (D
2) negative electrode be connected in the second output filter capacitor (C
o2) the other end and load (R
o) the other end.
The former limit winding (N of described former limit circuit (10) and transformer (T)
p) two ends be connected, the effect of former limit circuit (10) is that to produce positive negative pulse stuffing width be respectively 50% ac square wave voltage, and is put on transformer (T) former limit winding (N
p) two ends.In order to achieve this end, described former limit circuit (10) can be the circuit topologies such as full-bridge type, semibridge system.
The essential distinction of technical solution of the present invention and existing technical scheme is, booster circuit has been integrated in the high-frequency rectification circuit of isolated converter, and realize high step-up ratio by switched-capacitor circuit, this not only can effectively reduce stresses of parts, promote step-up ratio, and can realize all switching tubes soft switch, improve conversion efficiency.
The present invention has following beneficial effect:
(1) rectification circuit itself can be realized boost function, has effectively reduced the number of turn of house transformer winding, thereby can significantly reduce transformer leakage inductance, improve efficiency;
(2) by switched-capacitor circuit, can significantly improve voltage gain, this can further reduce the number of turn of required Transformer Winding;
(3) all switching tubes can both be realized soft switch, and conversion efficiency is high;
(4) power device of all switching tubes, diode can both be realized voltage clamp naturally, and device voltage stress is low.
Accompanying drawing explanation
Accompanying drawing 1 is traditional electrical flow pattern isolation boosting converter principle figure;
Accompanying drawing 2 is the many multiplication of voltages high-frequency rectification converter principle figure that the present invention is based on switching capacity;
Accompanying drawing 3 is many multiplication of voltages high-frequency rectification converter principle figure based on switching capacity that the former limit of the present invention adopts full-bridge circuit topology;
Accompanying drawing 4 is many multiplication of voltages high-frequency rectification converter principle figure based on switching capacity that the former limit of the present invention adopts half-bridge circuit topology;
Accompanying drawing 5 is groundwork oscillograms that former limit adopts the many multiplication of voltages high-frequency rectification converter based on switching capacity of full-bridge circuit topology;
Accompanying drawing 6～9th, former limit adopts the many multiplication of voltages high-frequency rectification converter based on switching capacity of full-bridge circuit topology at the equivalent circuit diagram of each switch mode;
Designation in above accompanying drawing: 10 is former limit circuit; 20 is rectification circuit; T is transformer; N
pand N
sbe respectively former limit winding and the secondary winding of transformer (T); L
hfor high-frequency inductor; S
1and S
2be respectively first, second switching tube; D
1and D
2be respectively the first and second diodes; C
a1and C
a2be respectively the first and second auxiliary capacitors; C
o1and C
o2be respectively the first and second output filter capacitors; R
ofor load; U
ofor output voltage; U
infor input source; L
1, L
2for inductance, D
3, D
4for diode; C
ofor output filter capacitor; S
p1, S
p2, S
p3and S
p4for switching tube; C
in1and C
in2for electric capacity; u
nPvoltage for winding two ends, the former limit of transformer (T); i
lHelectric current for high-frequency inductor; u
gSP1, u
gSP2, u
gSP3and u
gSP4be respectively switching tube S
p1, S
p2, S
p2and S
p4driving voltage; u
gS1and u
gS2be respectively the first and second switching tube (S
1and S
2) driving voltage; u
dSP4and u
dS2respectively switching tube S
p4with second switch pipe (S
2) drain electrode and the voltage between source electrode; i
sP1, i
sP2, i
sP3and i
sP4be respectively and flow into switching tube S
p1, S
p2, S
p3and S
p4the electric current of drain electrode; t
0, t
1, t
2, t
3, t
4and t
5for the time.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is elaborated.
As shown in Figure 2, described many multiplication of voltages high-frequency rectification isolated converter based on switching capacity consists of former limit circuit (10), transformer (T) and rectification circuit (20), and wherein transformer (T) comprises a secondary winding (N
s) and a former limit winding (N
p), rectification circuit (20) is by high-frequency inductor (L
h), the first switching tube (S
1), second switch pipe (S
2), the first auxiliary capacitor (C
a1), the second auxiliary capacitor (C
a2), the first diode (D
1), the second diode (D
2), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2) and load (R
o) form; Described transformer (T) secondary winding (N
s) one end be connected in high-frequency inductor (L
h) one end, high-frequency inductor (L
h) the other end be connected in the first auxiliary capacitor (C
a1) one end, the first auxiliary capacitor (C
a1) the other end be connected in the first switching tube (S
1) drain electrode, second switch pipe (S
2) source electrode and the second auxiliary capacitor (C
a2) one end, the first switching tube (S
1) source electrode be connected in the first output filter capacitor (C
o1) one end, load (R
o) one end and transformer (T) secondary winding (N
s) the other end, second switch pipe (S
2) drain electrode be connected in the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) one end and the first diode (D
1) anode, the second auxiliary capacitor (C
a2) the other end be connected in the first diode (D
1) negative electrode and the second diode (D
2) anode, the second diode (D
2) negative electrode be connected in the second output filter capacitor (C
o2) the other end and load (R
o) the other end.
In the present invention, the former limit winding (N of described former limit circuit (10) and transformer (T)
p) two ends be connected, the effect of former limit circuit (10) is that to produce positive negative pulse stuffing width be respectively 50% ac square wave voltage, and is put on transformer (T) former limit winding (N
p) two ends.In order to achieve this end, former limit circuit (10) has multiple circuit topology available, for example, can be the circuit topologies such as full-bridge type, semibridge system.The many multiplication of voltages high-gain high-frequency rectification isolated converter schematic diagram based on switching capacity when accompanying drawing 3 has provided former limit circuit (10) employing full bridge circuit topology, limit, figure Central Plains circuit comprises input source (U
in) and four switching tube (S
p1, S
p2, S
p3and S
p4), four switching tubes form full-bridge circuit structure, the mid point of two switch brachium pontis and transformer (T) former limit winding (N
p) two ends be connected.The many multiplication of voltages high-gain high-frequency rectification isolated converter schematic diagram based on switching capacity when accompanying drawing 4 has provided former limit circuit employing half bridge circuit topology, limit, figure Central Plains circuit comprises input source (U
in), two switching tube (S
p1, S
p2) and two electric capacity (C
in1and C
in2).
The object of the invention is to realize high efficiency isolation boosting conversion, in order to realize this object, the present invention is by the creationary rectification circuit that is placed in isolated converter of booster circuit, and boost by the high-frequency inductor in rectification circuit and common realization of switching tube, and by switched-capacitor circuit, improve boost capability, this can significantly reduce Transformer Winding the number of turn, reduce stresses of parts, raise the efficiency.
Take the former limit shown in accompanying drawing 3 below, to adopt the many multiplication of voltages high-gain high-frequency rectification isolated converter based on switching capacity of full bridge circuit topology be example, and operation principle of the present invention is described.Accompanying drawing 5 has provided the groundwork waveform that former limit adopts the many multiplication of voltages high-gain high-frequency rectification isolated converter based on switching capacity of full bridge circuit topology.
T
0constantly, former limit switching tube S
p2and S
p3conducting, full-bridge circuit applies negative voltage at the former limit winding (N of transformer (T)
p), high-frequency inductor (L
h) in electric current be negative value, the first switching tube (S
1) and the first diode (D
1) conducting, input source (U
in) through transformer (T) and high-frequency inductor (L
h) to the first auxiliary capacitor (C
a1) charging, the first output filter capacitor (C
o1) to the second auxiliary capacitor (C
a2) charging; t
0constantly, former limit switching tube S
p2and S
p3turn-off, due to high-frequency inductor (L
h) electric current can not suddenly change, and reflexes to transformer (T) former limit winding (N
p) electric current flow through former limit switching tube S
p1and S
p4body diode, be S
p1and S
p4no-voltage the condition that provides is provided, be applied to transformer (T) former limit winding (N simultaneously
p) voltage become on the occasion of, high-frequency inductor (L
h) current value start linearity and reduce, this mode equivalent electric circuit is as shown in Figure 6.
T
1constantly, switching tube S
p1and S
p4no-voltage is open-minded, and this mode equivalent electric circuit as shown in Figure 7.
T
2constantly, high-frequency inductor L
helectric current natural commutation.
T
3constantly, the first switching tube (S
1) turn-off high-frequency inductor (L
h) electric current flows through second switch pipe (S
2) body diode, be S
2no-voltage open the condition that provides, input source (U
in) through transformer (T), high-frequency inductor (L
h), second switch pipe (S
2) body diode and the first auxiliary capacitor (C
a1) to the first output filter capacitor (C
o1) charging, simultaneously the second diode (D
2) conducting, the second auxiliary capacitor (C
a2) to the second output filter capacitor (C
o2) charging, this mode equivalent electric circuit is as shown in Figure 8.
T
4constantly, second switch pipe (S
2) no-voltage is open-minded, this mode equivalent electric circuit is as shown in Figure 9.
T
5constantly, lower half switch periods starts, and the course of work is similar, no longer repeated description.
Known according to the description of the above-mentioned course of work, the present invention can realize the soft switch of all switching tubes, can effectively improve conversion efficiency.
Claims (3)
1. the high-frequency rectification of the many multiplication of voltages based on switching capacity isolated converter, is characterized in that:
Described many multiplication of voltages high-frequency rectification isolated converter based on switching capacity consists of former limit circuit (10), transformer (T) and rectification circuit (20), and wherein transformer (T) comprises a secondary winding (N
s) and a former limit winding (N
p), rectification circuit (20) is by high-frequency inductor (L
h), the first switching tube (S
1), second switch pipe (S
2), the first auxiliary capacitor (C
a1), the second auxiliary capacitor (C
a2), the first diode (D
1), the second diode (D
2), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2) and load (R
o) form;
Described transformer (T) secondary winding (N
s) one end be connected in high-frequency inductor (L
h) one end, high-frequency inductor (L
h) the other end be connected in the first auxiliary capacitor (C
a1) one end, the first auxiliary capacitor (C
a1) the other end be connected in the first switching tube (S
1) drain electrode, second switch pipe (S
2) source electrode and the second auxiliary capacitor (C
a2) one end, the first switching tube (S
1) source electrode be connected in the first output filter capacitor (C
o1) one end, load (R
o) one end and transformer (T) secondary winding (N
s) the other end, second switch pipe (S
2) drain electrode be connected in the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) one end and the first diode (D
1) anode, the second auxiliary capacitor (C
a2) the other end be connected in the first diode (D
1) negative electrode and the second diode (D
2) anode, the second diode (D
2) negative electrode be connected in the second output filter capacitor (C
o2) the other end and load (R
o) the other end.
2. the many multiplication of voltages high-frequency rectification isolated converter based on switching capacity according to claim 1, is characterized in that: the former limit winding (N of described former limit circuit (10) and transformer (T)
p) two ends be connected, it is respectively that 50% ac square wave voltage puts on transformer (T) former limit winding (N that described former limit circuit (10) produces positive negative pulse stuffing width
p) two ends.
3. the many multiplication of voltages high-frequency rectification isolated converter based on switching capacity according to claim 1, is characterized in that: described former limit circuit (10) can be the circuit topologies such as full-bridge type, semibridge system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410485737.7A CN104201894B (en) | 2014-09-18 | 2014-09-18 | Voltage-multiplying high frequency rectification isolated transformer based on switched capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410485737.7A CN104201894B (en) | 2014-09-18 | 2014-09-18 | Voltage-multiplying high frequency rectification isolated transformer based on switched capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104201894A true CN104201894A (en) | 2014-12-10 |
| CN104201894B CN104201894B (en) | 2017-01-18 |
Family
ID=52087140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410485737.7A Expired - Fee Related CN104201894B (en) | 2014-09-18 | 2014-09-18 | Voltage-multiplying high frequency rectification isolated transformer based on switched capacitors |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877657A (en) * | 2017-03-22 | 2017-06-20 | 天津大学 | The fuel cell imported quasi- Z source switches capacitance boost DC converter of wide scope |
| CN114884363A (en) * | 2022-05-10 | 2022-08-09 | 西南交通大学 | Double LLC resonant converter with six-time gain ratio and control method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904923B (en) * | 2014-04-17 | 2016-09-07 | 南京航空航天大学 | High-gain high frequency based on mixed-rectification brachium pontis and switching capacity boosting rectification isolated converter |
| CN103887987B (en) * | 2014-04-17 | 2016-08-17 | 南京航空航天大学 | A kind of multiple multiplication of voltage high-gain high-frequency rectification isolated converter based on switching capacity |
| 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 |
-
2014
- 2014-09-18 CN CN201410485737.7A patent/CN104201894B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877657A (en) * | 2017-03-22 | 2017-06-20 | 天津大学 | The fuel cell imported quasi- Z source switches capacitance boost DC converter of wide scope |
| CN114884363A (en) * | 2022-05-10 | 2022-08-09 | 西南交通大学 | Double LLC resonant converter with six-time gain ratio and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN104201894B (en) | 2017-01-18 |
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