CN1120562C - Minimum voltage type active clamp DC-DC converter - Google Patents
Minimum voltage type active clamp DC-DC converter Download PDFInfo
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- CN1120562C CN1120562C CN 01132207 CN01132207A CN1120562C CN 1120562 C CN1120562 C CN 1120562C CN 01132207 CN01132207 CN 01132207 CN 01132207 A CN01132207 A CN 01132207A CN 1120562 C CN1120562 C CN 1120562C
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Abstract
The present invention relates to a minimum voltage type active clamp DC-DC converter. After a serial circuit of a clamping capacitor and an auxiliary inductor is in parallel connected with an auxiliary switching tube, one end of the parallel circuit is connected with a main switching tube, and the other end is connected with a diode. The fundamental transformation circuit (namely the parallel circuit) is used for replacing the fundamental transformation circuit of six conventional DC-DC converters, such as, buck, boost, buckboost, Cuk, SEPIC, Zeta, etc. The present invention has the advantages of simple structure and low cost, and can effectively suppress the reverse recovery current of the diode. Both a main switch and an auxiliary switch of the minimum voltage type active clamp DC-DC converter are operated for switching with zero voltage, and thus, work efficiency is higher. After each power semiconductor device of the minimum voltage type active clamp DC-DC converter are turned off, born voltage stress is not increased corresponding to a conventional DC-DC converter. Both the voltage stress of the semiconductor device and the voltage stress of the clamping capacitor in the minimum voltage type active clamp DC-DC converter are smaller than a corresponding conventional active clamping converter.
Description
Technical field
The present invention relates to DC-DC converter.
Background technology
Shown in Figure 1 is connected with a rectifier diode D2 by a switching tube M1, and to draw and have label at contact be 1,2, the circuit of three links of 3, be among Fig. 2 a), b), c), d), e), f) buck converter shown in (buck), booster converter (boost), liter-buck converter (buckboost), Cook converter (Cuk), match Bick converter (SEPIC), basic transformation circuit in the DC-DC converter of the special converter 6 kinds of routines such as (Zeta) of bavin, Vin among each figure of Fig. 2 is the input voltage port of converter, Vo is the output voltage port of converter, L and L ' are the inductance in the converter, and C is the electric capacity in the converter.The weak point of the DC-DC converter that is made of this basic transformation circuit is that converter is hard switching work, and the caused dependent loss of diode reverse recovery is very high in the converter in continuous current mode work, and the current stress of switching tube is big.In recent years, in order to improve the efficient of DC-DC converter, many soft switch techniques are used in succession.Some converter using Zero voltage transition technology, the reverse recovery current that under the situation that does not increase device voltage stress, has suppressed diode, and realized the zero voltage switch work of main switch, still, often the auxiliary switch device in the converter is not operated in soft on off state; Though common active clamp technology can realize the soft switch work of main switch and auxiliary switch simultaneously, but the voltage stress of main switch and auxiliary switch increases many, and voltage stress increases along with the increase of control duty ratio and load, parasitic capacitance and the auxiliary induction resonance that diode closes its two ends of having no progeny in the converter produces more serious voltage oscillation in addition, and voltage stress is big.
Summary of the invention
The purpose of this invention is to provide the reverse recovery current that a class can suppress diode in the converter, guarantee that all device for power switching all realize the minimum voltage type active clamp DC-DC converter of soft switch work.
For reaching above-mentioned purpose, the measure that the present invention takes is to remove to substitute in the conventional DC-DC converter as shown in Figure 1 the basic transformation circuit that is made of switching tube and diode with the basic transformation circuit that main switch, diode, auxiliary switch, clamp capacitor and auxiliary induction constitute.Concrete technical solution has:
Scheme 5, minimum voltage type active clamp DC-DC converter of the present invention, it is match Bick converter (SEPIC) with three link basic transformation circuit, it is characterized in that said basic transformation circuit comprises main switch M1, diode D2, auxiliary switch M3, clamp capacitor Cc and auxiliary induction L1, the series circuit of clamp capacitor Cc and auxiliary induction L1 links to each other with main switch M1 with a end after auxiliary switch M3 is in parallel, the other end links to each other with diode D2, the other end of main switch M1, the contact of the contact of the other end of diode D2 and auxiliary switch M3 and diode D2 or clamp capacitor Cc and auxiliary induction L1 is respectively the link of basic transformation circuit in converter.
Scheme 6, minimum voltage type active clamp DC-DC converter of the present invention, it is the special converter (Zeta) of bavin with three link basic transformation circuit, it is characterized in that said basic transformation circuit comprises main switch M1, diode D2, auxiliary switch M3, clamp capacitor Cc and auxiliary induction L1, the series circuit of clamp capacitor Cc and auxiliary induction L1 links to each other with main switch M1 with a end after auxiliary switch M3 is in parallel, the other end links to each other with diode D2, the other end of main switch M1, the contact of the contact of the other end of diode D2 and auxiliary switch M3 and diode D2 or clamp capacitor Cc and auxiliary induction L1 is respectively the link of basic transformation circuit in converter.
Above-mentioned main switch and auxiliary switch can be the power bipolar transistors, also can be insulated door gated transistors or other controlled switching device.
The adding of auxiliary induction L1 makes that diode D2 is soft shutoff in the minimum voltage type active clamp DC-DC converter of the present invention, and reverse recovery current is effectively controlled.Main switch M1 and auxiliary switch M3 carry out in the switch handoff procedure, because the existence of auxiliary induction L1, have no progeny in auxiliary switch M3 pass, the electric current in the inductance L 1 will be to main switch M1 parasitic capacitance discharge, and main switch M1 will be by open-minded under the no-voltage situation afterwards.After arbitrary switching tube (M1 or M3) was turned off, its both end voltage all was clamped on the fixed voltage, does not increase the voltage stress of switching device with respect to the DC-DC converter of routine.Because at diode D2 blocking interval, main switch M1 and auxiliary switch M3 are conducting state again, so the shutoff voltage of D2 is also by clamper, and voltage stress is low.
Description of drawings
Fig. 1 is the basic transformation circuit in the existing DC-DC converter;
Fig. 2 is the conventional DC-DC converter that contains Fig. 1 basic transformation circuit,
Wherein, figure is a decompression DC-DC converter a);
Figure b) be voltage boosting dc-DC converter;
Figure c) is liter-decompression DC-DC converter;
Figure d) be the Cook DC-DC converter;
Figure e) is match Bick DC-DC converter;
Figure f) is the special DC-DC converter of bavin;
Fig. 3 is one of basic transformation practical circuit of the present invention;
Fig. 4 is two of a basic transformation practical circuit of the present invention;
Fig. 5 is the minimum voltage type active clamp DC-DC converter with Fig. 3 basic transformation circuit;
Fig. 6 is the minimum voltage type active clamp DC-DC converter with Fig. 4 basic transformation circuit.
Embodiment
Basic transformation circuit shown in Figure 3 comprises main switch M1, diode D2, auxiliary switch M3, clamp capacitor Cc and auxiliary induction L1, the series circuit of clamp capacitor Cc and auxiliary induction L1 links to each other with main switch M1 with a end after auxiliary switch M3 is in parallel, the other end links to each other with diode D2, the other end 1 of main switch M1, the contact 3 of the other end 2 of diode D2 and auxiliary switch M3 and diode D2 is respectively the link of basic transformation circuit in converter, wherein link 3 also can be the contact of clamp capacitor Cc and auxiliary induction L1 as shown in Figure 4.
With the circuit of basic transformation as shown in Figure 1 in 6 kinds of conventional DC-DC converter of Fig. 2, substituting according to the annexation of corresponding link becomes basic transformation circuit shown in Figure 3, just can obtain as Fig. 5 a), b), c), d), e), f) shown in 6 kinds of minimum voltage type active clamp DC-DC converters of the present invention.
With the circuit of basic transformation as shown in Figure 1 in 6 kinds of conventional DC-DC converter of Fig. 2, substituting according to the annexation of corresponding link becomes basic transformation circuit shown in Figure 4, just can obtain as Fig. 6 a), b), c), d), e), f) shown in 6 kinds of minimum voltage type active clamp DC-DC converters of the present invention.
When minimum voltage type active clamp DC-DC converter of the present invention was worked, main switch M1 adopted identical control mode with the switching tube in the corresponding conventional DC-DC converter.The switching frequency of auxiliary switch M3 is identical with the switching frequency of main switch M1, and it is to finish and its both end voltage is driven after dropping to zero naturally open-mindedly in the common stage of M1 and D2, and drives at main switch M1 and to be turned off before opening.
Claims (6)
1. minimum voltage type active clamp DC-DC converter, it is buck converter with three link basic transformation circuit, it is characterized in that said basic transformation circuit comprises main switch (M1), diode (D2), auxiliary switch (M3), clamp capacitor (Cc) and auxiliary induction (L1), the series circuit of clamp capacitor (Cc) and auxiliary induction (L1) links to each other with main switch (M1) with a end after auxiliary switch (M3) is in parallel, the other end links to each other with diode (D2), the other end (1) of main switch (M1), the other end (2) of diode (D2) and auxiliary switch (M3) are respectively the link of basic transformation circuit in converter with the contact of diode (D2) or the contact (3) of clamp capacitor (Cc) and auxiliary induction (L1).
2. minimum voltage type active clamp DC-DC converter, it is booster converter with three link basic transformation circuit, it is characterized in that said basic transformation circuit comprises main switch (M1), diode (D2), auxiliary switch (M3), clamp capacitor (Cc) and auxiliary induction (L1), the series circuit of clamp capacitor (Cc) and auxiliary induction (L1) links to each other with main switch (M1) with a end after auxiliary switch (M3) is in parallel, the other end links to each other with diode (D2), the other end (1) of main switch (M1), the other end (2) of diode (D2) and auxiliary switch (M3) are respectively the link of basic transformation circuit in converter with the contact of diode (D2) or the contact (3) of clamp capacitor (Cc) and auxiliary induction (L1).
3. minimum voltage type active clamp DC-DC converter, it is liter-buck converter with three link basic transformation circuit, it is characterized in that said basic transformation circuit comprises main switch (M1), diode (D2), auxiliary switch (M3), clamp capacitor (Cc) and auxiliary induction (L1), the series circuit of clamp capacitor (Cc) and auxiliary induction (L1) links to each other with main switch (M1) with a end after auxiliary switch (M3) is in parallel, the other end links to each other with diode (D2), the other end (1) of main switch (M1), the other end (2) of diode (D2) and auxiliary switch (M3) are respectively the link of basic transformation circuit in converter with the contact of diode (D2) or the contact (3) of clamp capacitor (Cc) and auxiliary induction (L1).
4. minimum voltage type active clamp DC-DC converter, it is Cook converter with three link basic transformation circuit, it is characterized in that said basic transformation circuit comprises main switch (M1), diode (D2), auxiliary switch (M3), clamp capacitor (Cc) and auxiliary induction (L1), the series circuit of clamp capacitor (Cc) and auxiliary induction (L1) links to each other with main switch (M1) with a end after auxiliary switch (M3) is in parallel, the other end links to each other with diode (D2), the other end (1) of main switch (M1), the other end (2) of diode (D2) and auxiliary switch (M3) are respectively the link of basic transformation circuit in converter with the contact of diode (D2) or the contact (3) of clamp capacitor (Cc) and auxiliary induction (L1).
5. minimum voltage type active clamp DC-DC converter, it is match Bick converter with three link basic transformation circuit, it is characterized in that said basic transformation circuit comprises main switch (M1), diode (D2), auxiliary switch (M3), clamp capacitor (Cc) and auxiliary induction (L1), the series circuit of clamp capacitor (Cc) and auxiliary induction (L1) links to each other with main switch (M1) with a end after auxiliary switch (M3) is in parallel, the other end links to each other with diode (D2), the other end (1) of main switch (M1), the other end (2) of diode (D2) and auxiliary switch (M3) are respectively the link of basic transformation circuit in converter with the contact of diode (D2) or the contact (3) of clamp capacitor (Cc) and auxiliary induction (L1).
6. minimum voltage type active clamp DC-DC converter, it is the special converter of bavin with three link basic transformation circuit, it is characterized in that said basic transformation circuit comprises main switch (M1), diode (D2), auxiliary switch (M3), clamp capacitor (Cc) and auxiliary induction (L1), the series circuit of clamp capacitor (Cc) and auxiliary induction (L1) links to each other with main switch (M1) with a end after auxiliary switch (M3) is in parallel, the other end links to each other with diode (D2), the other end (1) of main switch (M1), the other end (2) of diode (D2) and auxiliary switch (M3) are respectively the link of basic transformation circuit in converter with the contact of diode (D2) or the contact (3) of clamp capacitor (Cc) and auxiliary induction (L1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01132207 CN1120562C (en) | 2001-11-13 | 2001-11-13 | Minimum voltage type active clamp DC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01132207 CN1120562C (en) | 2001-11-13 | 2001-11-13 | Minimum voltage type active clamp DC-DC converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1352486A CN1352486A (en) | 2002-06-05 |
| CN1120562C true CN1120562C (en) | 2003-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01132207 Expired - Lifetime CN1120562C (en) | 2001-11-13 | 2001-11-13 | Minimum voltage type active clamp DC-DC converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338860C (en) * | 2005-07-05 | 2007-09-19 | 北京航空航天大学 | Booster type high-power DC/DC converter flexible converter circuit for fuel cell passenger coach |
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| CN1998129B (en) * | 2004-07-12 | 2010-06-16 | 奥地利西门子公司 | Method for operating an inverter, and arrangement for carrying out said method |
| CN100342630C (en) * | 2005-07-05 | 2007-10-10 | 北京航空航天大学 | Pressure-reduced type high-power DC/DC converter flexible converter circuit for fuel-cell passenger coach |
| EP2227724A1 (en) * | 2007-12-04 | 2010-09-15 | California Power Research, Inc. | Sepic fed buck converter |
| CN102163918B (en) * | 2010-09-13 | 2013-05-08 | 南京航空航天大学 | Bi-directional direct current (DC) converter with active clamping ZVS (zero voltage switch) |
| DE102010041632A1 (en) * | 2010-09-29 | 2012-03-29 | Osram Gesellschaft mit beschränkter Haftung | Circuit arrangement for operating at least two semiconductor light sources |
| CN104426396B (en) * | 2013-08-30 | 2018-04-27 | 欧司朗股份有限公司 | Load driving circuits and the lighting apparatus including the load driving circuits |
| CN104682705B (en) * | 2015-02-13 | 2017-06-20 | 华为技术有限公司 | A kind of DC two-way changing circuit and power supply |
| CN104836491B (en) * | 2015-04-30 | 2017-05-24 | 南京航空航天大学 | Brushless direct current motor driving system for capacitor-less direct-current converter |
| CN108712070B (en) * | 2018-05-31 | 2019-09-10 | 重庆大学 | Based on ZCS PWM bi-directional DC-DC CUK converter, transformation system and method |
| CN108900083B (en) | 2018-06-05 | 2020-09-18 | 华为技术有限公司 | Power converter and related system |
| CN111987904A (en) * | 2020-08-06 | 2020-11-24 | 哈尔滨工程大学 | Non-isolated DC/DC converter |
-
2001
- 2001-11-13 CN CN 01132207 patent/CN1120562C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338860C (en) * | 2005-07-05 | 2007-09-19 | 北京航空航天大学 | Booster type high-power DC/DC converter flexible converter circuit for fuel cell passenger coach |
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| CN1352486A (en) | 2002-06-05 |
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Granted publication date: 20030903 |