CN1307396A - DC/DC converter circuit with zero-voltage soft switch - Google Patents
DC/DC converter circuit with zero-voltage soft switch Download PDFInfo
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- CN1307396A CN1307396A CN00101257A CN00101257A CN1307396A CN 1307396 A CN1307396 A CN 1307396A CN 00101257 A CN00101257 A CN 00101257A CN 00101257 A CN00101257 A CN 00101257A CN 1307396 A CN1307396 A CN 1307396A
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- transformer
- zero
- rectifier diode
- inverter
- voltage
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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
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- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Abstract
The DC converter is constituted by increasing transformer and rectifying diode to available DC/DC converter. Of the two transformers, the primary windings are connected parallelly with two ends being connected to the right and left central arm joints in the inverter separately; the secondary windings are connected serially and successively with the like end of one transformer being connected to the positve of one rectifying diode, the dislike end of the other transformer being connected to the positve of the other rectifying diode and the negative of two rectifying diodes being connected together. By the magnetic energy conversion between the two transformers, the main switch of the inverter can realize zero-voltage conduction resulting in less duty cycle loss.
Description
The present invention relates to a kind of DC-DC electric power conversion apparatus.
Full-bridge phase shifting formula DC circuit comprises inverter A, transformer T1 and rectifier diode D5, and the direct voltage of importing this translation circuit is transformed into interchange through inverter, and after the transformer transformation, rectification becomes direct current output.At present realize that for the main switch of inverter soft switch is to adopt to seal in linearity or pulsactor Ls (as shown in Figure 1) in the main switch loop, or adopt the method for series connection pulsactor on output rectifier diode D5 to realize.Because the existence of linear inductance or pulsactor not only cause losing of duty ratio, and in the high-power applications occasion, linear inductance or pulsactor thermal losses is very big, temperature is too high, and in addition, the lagging leg main switch also is difficult to realize soft switch under the underloading condition.
In view of above-mentioned, the purpose of this invention is to provide a kind of Zero-voltage soft switch DC circuit, its duty-cycle loss is little, no inductance excess loss, and can make the switching device of inverter four brachium pontis in full-load range, realize soft switch.
Zero-voltage soft switch DC-DC switched circuit of the present invention, be in existing DC circuit, to set up transformer and rectifier diode formation, it comprises inverter, transformer, rectifier diode and newly-increased transformer and rectifier diode, after the primary coil parallel connection with two transformers, its two end respectively with an inverter left side, the mid point of right brachium pontis links to each other, secondary coil is along the polarity series connection, the former rectifier diode positive pole of the secondary coil of its Central Plains transformer termination of the same name, the secondary coil non-same polarity of newly-increased transformer connects newly-increased rectifier diode positive pole, and the negative pole of two rectifier diodes links to each other.During work, it is open-minded to utilize two magnetic energy between the transformer to shift the no-voltage that realizes the inverter main switch.
Below in conjunction with accompanying drawing the present invention is described in detail.
Fig. 1 is existing DC circuit;
Fig. 2 is a circuit diagram of the present invention.
With reference to Fig. 2, Zero-voltage soft switch DC circuit of the present invention comprises the inverter A that constitutes of inverse parallel diode D1～D4 and shunt capacitance C1～C4 separately by main switch M1～M4, two transformer T1, T2 and two rectifier diode D5, D6, the primary coil parallel connection of two transformers, its two end respectively with an inverter bridge left side, the mid point of right brachium pontis links to each other, secondary coil is along the polarity series connection, the secondary coil of transformer T1 termination rectifier diode of the same name D5 positive pole wherein, the secondary coil non-same polarity of transformer T2 connects rectifier diode D6 positive pole, two rectifier diode D5, the negative pole of D6 links to each other.
The course of work of Zero-voltage soft switch DC circuit of the present invention is as follows:
The no-load voltage ratio of supposing two transformers is n, establishes t＜t
0The time, the converter operating state is: main switch M2 and M4 conducting, and capacitor C 1, C3 is transfused to power source charges, and the transformer original edge voltage equals input voltage, and power is sent to load by the former limit of transformer T2.Transformer T1 is because oppositely the ending of D5, not to the load transfer energy, and with the form storage power of magnetizing inductance.
T=t
0Constantly, make main switch M4 turn-off, primary current is to capacitor C 4 chargings, the magnetizing inductance of transformer T1 discharges magnetic field energy simultaneously, makes capacitor C 1 resonant discharge to zero, diode D1 conducting, at this moment, the left brachium pontis conducting of inverter is transformed into M1 by main switch M4, has realized that the M1 no-voltage is open-minded.After the D1 conducting, former limit of transformer T2 and secondary voltage are zero, and primary current is by main switch M2 and diode D1 afterflow.
T=t
1Constantly, make main switch M2 turn-off, capacitor C 2 is recharged.Be stored in energy in the transformer T1 magnetizing inductance this moment and be released and make capacitor C 3 resonant discharge to zero, the D3 conducting, after this, primary current is zero passage (t under the effect of input voltage
2).The right brachium pontis conducting of this stage inverter is transferred to M3 by main switch M2.Realized that the M3 no-voltage is open-minded.
T＞t
2Constantly, primary current continues rapidly to increasing in the other direction, to t
3Circuit enters stable state, and transformer T1 has set up voltage, and beginning is arrived load to the secondary transmitted power.Transformer T2 then since secondary rectifier diode D6 oppositely by can't be to the load transmission power, and with form storage power in magnetizing inductance of inductance, open for the Zero-voltage soft of main switch M2 and M4 and to prepare.
T
4After, converter begins to enter second cycle, and operational mode is analyzed also consistent with the front to top described similar.
As fully visible, the present invention is implemented in complete negative by the mutual transfer of excitatory energy between two transformers The no-voltage of inverter main switch is open-minded in the scope of carrying, because Zero-voltage soft switch DC/DC conversion circuit, Only be subjected to the impact of transformer leakage inductance, so its duty-cycle loss is little, compared with prior art, volume on the no inductance Outer loss.
Claims (1)
1. Zero-voltage soft switch DC circuit, comprise inverter [A], transformer [T1] and rectifier diode [D5], it is characterized in that setting up a transformer [T2] and rectifier diode [D6], with two transformers [T1], after the primary coil parallel connection of [T2], its two end respectively with an inverter bridge left side, the mid point of right brachium pontis links to each other, secondary coil is along the polarity series connection, the secondary coil of transformer [T1] termination rectifier diode of the same name [D5] positive pole wherein, the secondary coil non-same polarity of transformer [T2] connects rectifier diode [D6] positive pole, two rectifier diodes [D5], the negative pole of [D6] links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00101257A CN1118128C (en) | 2000-01-24 | 2000-01-24 | DC/DC converter circuit with zero-voltage soft switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00101257A CN1118128C (en) | 2000-01-24 | 2000-01-24 | DC/DC converter circuit with zero-voltage soft switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1307396A true CN1307396A (en) | 2001-08-08 |
| CN1118128C CN1118128C (en) | 2003-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00101257A Expired - Fee Related CN1118128C (en) | 2000-01-24 | 2000-01-24 | DC/DC converter circuit with zero-voltage soft switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1118128C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407564C (en) * | 2004-08-30 | 2008-07-30 | 三垦电气株式会社 | DC power source apparatus |
| CN105048816A (en) * | 2010-06-25 | 2015-11-11 | 株式会社日立制作所 | Dc-dc converter |
| US9356526B2 (en) | 2013-12-06 | 2016-05-31 | Industrial Technology Research Institute | DC-DC power conversion apparatus and method |
| CN106026676A (en) * | 2016-07-15 | 2016-10-12 | 西安后羿半导体科技有限公司 | Double-transformer full-bridge conversion device |
| CN107040141A (en) * | 2016-02-02 | 2017-08-11 | Tdk株式会社 | Switching power unit |
-
2000
- 2000-01-24 CN CN00101257A patent/CN1118128C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407564C (en) * | 2004-08-30 | 2008-07-30 | 三垦电气株式会社 | DC power source apparatus |
| CN105048816A (en) * | 2010-06-25 | 2015-11-11 | 株式会社日立制作所 | Dc-dc converter |
| CN105048816B (en) * | 2010-06-25 | 2018-02-09 | 株式会社日立制作所 | DC DC converters |
| US9356526B2 (en) | 2013-12-06 | 2016-05-31 | Industrial Technology Research Institute | DC-DC power conversion apparatus and method |
| CN107040141A (en) * | 2016-02-02 | 2017-08-11 | Tdk株式会社 | Switching power unit |
| CN107040141B (en) * | 2016-02-02 | 2019-04-30 | Tdk株式会社 | Switching power unit |
| CN106026676A (en) * | 2016-07-15 | 2016-10-12 | 西安后羿半导体科技有限公司 | Double-transformer full-bridge conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1118128C (en) | 2003-08-13 |
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