CN102545618B - Full-bridge phase-shifting soft switching circuit - Google Patents
Full-bridge phase-shifting soft switching circuit Download PDFInfo
- Publication number
- CN102545618B CN102545618B CN201010598797.1A CN201010598797A CN102545618B CN 102545618 B CN102545618 B CN 102545618B CN 201010598797 A CN201010598797 A CN 201010598797A CN 102545618 B CN102545618 B CN 102545618B
- Authority
- CN
- China
- Prior art keywords
- capacitor
- igbt pipe
- diode
- transformer
- full
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Inverter Devices (AREA)
Abstract
The invention relates to a full-bridge phase-shifting soft switching circuit, which is characterized in that: a collector of Q1, a negative electrode of D1, one end of C1, a collector of Q2, a negative electrode of D2 and one end of C2 are connected with a positive electrode of Uin, and an emitter of Q3, a positive electrode of D3, one end of C3, an emitter of Q4, a positive electrode of D4 and one end of C4 are connected with a negative electrode of the Uin; an emitter of the Q1, a positive electrode of the D1, the other end of the C1, a collector of the Q3, a negative electrode of the D3 and the other end of the C3 are connected with a second end of T1, an emitter of the Q2, a positive electrode of the D2, the other end of the C2, an emitter of the Q4, negative electrode of the D4, and the other end of the C4 are connected with one end of C5, and the other end of the C5 is connected with a first end of the T1; a third end of the T1 is connected with a positive electrode of D5, and a fourth end of the T1 is connected with a positive electrode of D6; a negative electrode of the D5 and a negative electrode of the D6 are connected with one end of L1, and the other end of the L1 and one end of C6 are connected with a positive electrode of an output end; and a fifth end of the T1 and the other end of the C6 are connected with a negative electrode of the output end. The circuit can reliably complete the soft switching function of a switching tube.
Description
Technical field
The present invention relates to soft switch technique, particularly relate to a kind of Full-bridge phase-shifting soft switching circuit.
Background technology
Soft switch circuit is a very important part in a lot of electronic circuits, and reasonably soft opening with soft turn-off performance provides abundanter performance for circuit.Soft switch circuit of the prior art has multiple implementation, but these implementations complicated structure often, and softly open, the reliability of soft turn-off performance is not high.
Not enough for prior art, provide a kind of Full-bridge phase-shifting soft switching circuit very necessary to solve prior art deficiency.
Summary of the invention
The object of the invention is to avoid the deficiencies in the prior art part and Full-bridge phase-shifting soft switching circuit simple in structure, with low cost is provided.
Object of the present invention realizes by following technical measures.
A Full-bridge phase-shifting soft switching circuit, is provided with IGBT pipe Q1, Q2, Q3, Q4, diode D1, D2, D3, D4, D5, D6, capacitor C 1, C2, C3, C4, C5, C6, inductance L 1 and transformer T1;
Transformer T1 is provided with 1 end, 2 ends, 3 ends, 4 ends and 5 ends;
The IGBT pipe collector electrode of Q1, one end of the negative pole of diode D1, capacitor C 1, the IGBT pipe collector electrode of Q2, one end of the negative pole of diode D2, capacitor C 2 be connected with input Uin positive pole;
The IGBT pipe emitter of Q3, one end of the positive pole of diode D3, capacitor C 3, the IGBT pipe emitter of Q4, one end of the positive pole of diode D4, capacitor C 4 be connected with input Uin negative pole;
The IGBT pipe emitter of Q1, the other end of the positive pole of diode D1, capacitor C 1, the IGBT pipe collector electrode of Q3, the other end of the negative pole of diode D3, capacitor C 3 and 2 ends of transformer T1 be connected;
The IGBT pipe emitter of Q2, the other end of the positive pole of diode D2, capacitor C 2, the IGBT pipe collector electrode of Q4, the other end of the negative pole of diode D4, capacitor C 4 is connected with one end of capacitor C 5, the other end of capacitor C 5 is connected with 1 end of transformer T1;
3 ends of transformer T1 are connected with the positive pole of diode D5,4 ends of transformer T1 are connected with the positive pole of diode D6, the negative pole of the negative pole of diode D5, diode D6 is connected with one end of inductance L 1, and one end of the other end of inductance L 1, capacitor C 6 is connected with output Uout is anodal;
5 ends of transformer T1, the other end of capacitor C 6 are connected with output Uout negative pole.
Described transformer T1, capacitor C 1, C2, C3 and C4 satisfy condition:
, wherein, E=(1/2) L
ri
1 2;
Wherein, C
tfor the distributed capacitance of the primary coil of described transformer T1,
Described L
rfor the leakage inductance of the primary coil of described transformer T1,
I1 is transformer T1 primary coil at the positive half cycle electric current before resonance for the first time;
I2 is transformer T1 primary coil at the positive half cycle electric current before resonance for the second time;
T
dead1for the Dead Time between IGBT pipe Q1 and IGBT pipe Q3;
T
dead2for the Dead Time between IGBT pipe Q2 and IGBT pipe Q4.
The IGBT pipe Q1 that described IGBT pipe Q1 is model FGL40N120AND.
The IGBT pipe Q2 that described IGBT pipe Q2 is model FGL40N120AND.
The IGBT pipe Q3 that described IGBT pipe Q3 is model FGL40N120AND.
The IGBT pipe Q4 that described IGBT pipe Q4 is model FGL40N120AND.
Described capacitor C 5 is 250V, 4.7uH.
The primary coil of described transformer T1 and the turn ratio of secondary coil are 24:4, and described transformer T1 is primary coil leakage inductance L
rdistributed capacitance C for 15uH, primary coil
ttransformer T1 for 200nH.
Described capacitor C 2 is 370 pF, and described capacitor C 4 is 370 pF.
Described inductance L 1 is 100 uH, 100A.
A kind of Full-bridge phase-shifting soft switching circuit of the present invention, is provided with IGBT pipe Q1, Q2, Q3, Q4, diode D1, D2, D3, D4, D5, D6, capacitor C 1, C2, C3, C4, C5, C6, inductance L 1 and transformer T1; Transformer T1 is provided with 1 end, 2 ends, 3 ends, 4 ends and 5 ends; The IGBT pipe collector electrode of Q1, one end of the negative pole of diode D1, capacitor C 1, the IGBT pipe collector electrode of Q2, one end of the negative pole of diode D2, capacitor C 2 be connected with input Uin positive pole; The IGBT pipe emitter of Q3, one end of the positive pole of diode D3, capacitor C 3, the IGBT pipe emitter of Q4, one end of the positive pole of diode D4, capacitor C 4 be connected with input Uin negative pole; The IGBT pipe emitter of Q1, the other end of the positive pole of diode D1, capacitor C 1, the IGBT pipe collector electrode of Q3, the other end of the negative pole of diode D3, capacitor C 3 and 2 ends of transformer T1 be connected; The IGBT pipe emitter of Q2, the other end of the positive pole of diode D2, capacitor C 2, the IGBT pipe collector electrode of Q4, the other end of the negative pole of diode D4, capacitor C 4 is connected with one end of capacitor C 5, the other end of capacitor C 5 is connected with 1 end of transformer T1; 3 ends of transformer T1 are connected with the positive pole of diode D5,4 ends of transformer T1 are connected with the positive pole of diode D6, the negative pole of the negative pole of diode D5, diode D6 is connected with one end of inductance L 1, and one end of the other end of inductance L 1, capacitor C 6 is connected with output Uout is anodal; 5 ends of transformer T1, the other end of capacitor C 6 are connected with output Uout negative pole.This Full-bridge phase-shifting soft switching circuit can complete the soft switching function of switching tube reliably, and circuit structure is simple, with low cost.
Accompanying drawing explanation
The present invention is further illustrated to utilize accompanying drawing, but content in accompanying drawing does not form any limitation of the invention.
Fig. 1 is the electrical block diagram of a kind of Full-bridge phase-shifting soft switching circuit of the present invention.
Embodiment
The invention will be further described with the following Examples.
embodiment 1.
As shown in Figure 1, a kind of Full-bridge phase-shifting soft switching circuit, is provided with IGBT pipe Q1, Q2, Q3, Q4, diode D1, D2, D3, D4, D5, D6, capacitor C 1, C2, C3, C4, C5, C6, inductance L 1 and transformer T1.
Transformer T1 is provided with 1 end, 2 ends, 3 ends, 4 ends and 5 ends.
The IGBT pipe collector electrode of Q1, one end of the negative pole of diode D1, capacitor C 1, the IGBT pipe collector electrode of Q2, one end of the negative pole of diode D2, capacitor C 2 be connected with input Uin positive pole.
The IGBT pipe emitter of Q3, one end of the positive pole of diode D3, capacitor C 3, the IGBT pipe emitter of Q4, one end of the positive pole of diode D4, capacitor C 4 be connected with input Uin negative pole.
The IGBT pipe emitter of Q1, the other end of the positive pole of diode D1, capacitor C 1, the IGBT pipe collector electrode of Q3, the other end of the negative pole of diode D3, capacitor C 3 and 2 ends of transformer T1 be connected.
The IGBT pipe emitter of Q2, the other end of the positive pole of diode D2, capacitor C 2, the IGBT pipe collector electrode of Q4, the other end of the negative pole of diode D4, capacitor C 4 is connected with one end of capacitor C 5, the other end of capacitor C 5 is connected with 1 end of transformer T1.
3 ends of transformer T1 are connected with the positive pole of diode D5,4 ends of transformer T1 are connected with the positive pole of diode D6, the negative pole of the negative pole of diode D5, diode D6 is connected with one end of inductance L 1, and one end of the other end of inductance L 1, capacitor C 6 is connected with output Uout is anodal.
5 ends of transformer T1, the other end of capacitor C 6 are connected with output Uout negative pole.
Described transformer T1, capacitor C 1, C2, C3 and C4 satisfy condition:
；
Wherein, C
tfor the distributed capacitance of the primary coil of described transformer T1,
Described L
rfor the leakage inductance of the primary coil of described transformer T1,
I1 is transformer T1 primary coil at the positive half cycle electric current before resonance for the first time;
I2 is transformer T1 primary coil at the positive half cycle electric current before resonance for the second time;
T
dead1for the Dead Time between IGBT pipe Q1 and IGBT pipe Q3;
T
dead2for the Dead Time between IGBT pipe Q2 and IGBT pipe Q4.
The model FGL40N120AND of IGBT pipe Q1, Q2, Q3, Q4, described capacitor C 5 is 250V, 4.7uH, described inductance L 1 is 100 uH, 100A.
Full-bridge phase-shifting soft switching circuit of the present invention, its operation principle is: circuit adopts phase-shifting control method, and in each switch periods, Q1, Q3 are first turned on and off, and turns on and off after Q2, Q4 quilt.
During positive half cycle, Q1 is by being conducting to while turn-offing, and the primary current of transformer T1 is due to transformer inductance and leakage inductance, and electric current can not suddenly change, and electric current continues to maintain former flow direction.Therefore C1 is by quick charge, C3 is by repid discharge; When C3 is discharged into 0V, afterflow is carried out in the smooth conducting of D3, and the simultaneously conducting of D3 also allows the voltage between the collector and emitter of Q3 be forward conduction voltage drop of 0V(diode by clamp), for realizing no-voltage, Q3 opens the condition of having got well of creating.Because C1 is recharged, D1 is reversed cut-off.Q4 is by being conducting to while turn-offing, and C2 is discharged, and C4 is recharged, when C2 is placed to 0V, afterflow is carried out in the smooth conducting of D2, and the simultaneously conducting of D2 also allows the voltage between the collector and emitter of Q2 be forward conduction voltage drop of 0V(diode by clamp), for realizing no-voltage, Q2 opens the condition of having got well of creating.But now secondary two arrange diode conducting simultaneously, and primary side is by short circuit, and secondary inductance energy cannot participate in resonance.
During negative half period, Q3 is by being conducting to while turn-offing, and transformer T1 primary current reverse flow, can not suddenly change equally.Therefore C3 is by quick charge, C1 is by repid discharge; When C1 is discharged into 0V, afterflow is carried out in the smooth conducting of D1, and the simultaneously conducting of D1 also allows the voltage between the collector and emitter of Q1 be forward conduction voltage drop of 0V(diode by clamp), for realizing no-voltage, Q1 opens the condition of having got well of creating.Because C3 is recharged, D3 is reversed cut-off.Q2 is by being conducting to while turn-offing, and C2 is recharged, and C4 is discharged, when C4 is placed to 0V, afterflow is carried out in the smooth conducting of D4, and the simultaneously conducting of D4 also allows the voltage between the collector and emitter of Q4 be forward conduction voltage drop of 0V(diode by clamp), for realizing no-voltage, Q4 opens the condition of having got well of creating.But now secondary two arrange diode conducting simultaneously, and primary side is by short circuit, and secondary inductance energy cannot participate in resonance.
Realize the condition that no-voltage is opened:
The no-voltage that realizes switching tube is open-minded, the electric charge in the switching tube junction capacitance that must have enough energy to take away will to open, and the junction capacitance charging of giving the switching tube that will turn-off on same brachium pontis.Meanwhile, consider the former limit winding electric capacity of transformer T1, also want part energy to take the electric charge on transformer primary side winding distributed capacitance away.That is to say, must meet:
For leading arm (Q1, Q3), the energy that is used for realizing ZVS is the energy sum in transformer leakage inductance and output inductor.Because outputting inductance energy storage is very large, so ZVS is easy to realize.
But for lagging leg (Q2, Q4), the energy that is used for realizing ZVS is only the energy storage of transformer leakage inductance.Therefore, whether we only need to calculate the energy storage of primary coil leakage inductance and meet the demands.
In addition, leading arm resonance time
must be less than the Dead Time between Q1 and Q3, otherwise brachium pontis will lead directly to and causes primary coil short circuit.Have:
Lagging leg resonance time
also must be less than the Dead Time between Q2 and Q4, otherwise brachium pontis will lead directly to and causes primary coil short circuit.Have:
Note: Lr is transformer leakage inductance
I
1for the positive half cycle of primary coil transformer current value before resonance for the first time, I
2for positive half cycle current value before resonance for the second time.Desirable I in practical engineering calculation
1=I
2=Ip.
Therefore this Full-bridge phase-shifting soft switching circuit can complete the soft switching function of switching tube reliably, and circuit structure is simple, with low cost.
embodiment 2.
A full-bridge phase-shift soft switch, other structure is identical with embodiment 1, and difference is, and capacitor C 2 is 370 pF, and described capacitor C 4 is 370 pF, described transformer T1 is primary coil leakage inductance L
rdistributed capacitance C for 15uH, primary coil
ttransformer T1 for 200nH.
Design, Uin=530V, Ip=15A, Dead Time is designed to 300nS.
Be calculated as follows:
Primary side resonant energy:
Energy on electric capacity and transformer:
E
1>E
2, first condition meets.
Resonance time:
Satisfy condition 2.
From actual debug results, this circuit can complete the soft switching function of switching tube reliably, and laboratory efficiency can reach 96%.Actual small lot batch manufacture overall efficiency is more than 93%.And circuit structure is simple, with low cost.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although the present invention is explained in detail with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.
Claims (7)
1. a Full-bridge phase-shifting soft switching circuit, is characterized in that: be provided with IGBT pipe Q1, Q2, Q3, Q4, diode D1, D2, D3, D4, D5, D6, capacitor C 1, C2, C3, C4, C5, C6, inductance L 1 and transformer T1;
Transformer T1 is provided with 1 end, 2 ends, 3 ends, 4 ends and 5 ends;
The IGBT pipe collector electrode of Q1, one end of the negative pole of diode D1, capacitor C 1, the IGBT pipe collector electrode of Q2, one end of the negative pole of diode D2, capacitor C 2 be connected with input Uin positive pole;
The IGBT pipe emitter of Q3, one end of the positive pole of diode D3, capacitor C 3, the IGBT pipe emitter of Q4, one end of the positive pole of diode D4, capacitor C 4 be connected with input Uin negative pole;
The IGBT pipe emitter of Q1, the other end of the positive pole of diode D1, capacitor C 1, the IGBT pipe collector electrode of Q3, the other end of the negative pole of diode D3, capacitor C 3 and 2 ends of transformer T1 be connected;
The IGBT pipe emitter of Q2, the other end of the positive pole of diode D2, capacitor C 2, the IGBT pipe collector electrode of Q4, the other end of the negative pole of diode D4, capacitor C 4 is connected with one end of capacitor C 5, the other end of capacitor C 5 is connected with 1 end of transformer T1;
3 ends of transformer T1 are connected with the positive pole of diode D5,4 ends of transformer T1 are connected with the positive pole of diode D6, the negative pole of the negative pole of diode D5, diode D6 is connected with one end of inductance L 1, and one end of the other end of inductance L 1, capacitor C 6 is connected with output Uout is anodal;
5 ends of transformer T1, the other end of capacitor C 6 are connected with output Uout negative pole;
Described transformer T1, capacitor C 1, C2, C3 and C4 satisfy condition:
, wherein, E=(1/2) L
ri
1 2;
；
Wherein, C
tfor the distributed capacitance of the primary coil of described transformer T1,
Described L
rfor the leakage inductance of the primary coil of described transformer T1,
I1 is transformer T1 primary coil at the positive half cycle electric current before resonance for the first time;
I2 is transformer T1 primary coil at the positive half cycle electric current before resonance for the second time;
T
dead1for the Dead Time between IGBT pipe Q1 and IGBT pipe Q3;
T
dead2for the Dead Time between IGBT pipe Q2 and IGBT pipe Q4.
2. Full-bridge phase-shifting soft switching circuit according to claim 1, is characterized in that:
The IGBT pipe Q1 that described IGBT pipe Q1 is model FGL40N120AND.
3. Full-bridge phase-shifting soft switching circuit according to claim 1, is characterized in that:
The IGBT pipe Q2 that described IGBT pipe Q2 is model FGL40N120AND.
4. Full-bridge phase-shifting soft switching circuit according to claim 1, is characterized in that:
The IGBT pipe Q3 that described IGBT pipe Q3 is model FGL40N120AND.
5. Full-bridge phase-shifting soft switching circuit according to claim 1, is characterized in that:
The IGBT pipe Q4 that described IGBT pipe Q4 is model FGL40N120AND.
6. Full-bridge phase-shifting soft switching circuit according to claim 1, is characterized in that: described capacitor C 2 is 370 pF, and described capacitor C 4 is 370 pF.
7. Full-bridge phase-shifting soft switching circuit according to claim 1, is characterized in that: described inductance L 1 is 100 uH, 100A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010598797.1A CN102545618B (en) | 2010-12-21 | 2010-12-21 | Full-bridge phase-shifting soft switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010598797.1A CN102545618B (en) | 2010-12-21 | 2010-12-21 | Full-bridge phase-shifting soft switching circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102545618A CN102545618A (en) | 2012-07-04 |
| CN102545618B true CN102545618B (en) | 2014-03-26 |
Family
ID=46351742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010598797.1A Active CN102545618B (en) | 2010-12-21 | 2010-12-21 | Full-bridge phase-shifting soft switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102545618B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540851A (en) * | 2003-10-31 | 2004-10-27 | 哈尔滨工业大学 | Switch PWM convertor working at zero voltage and zero current of full bridge |
| CN101060284A (en) * | 2006-04-13 | 2007-10-24 | 康舒科技股份有限公司 | Soft switching phase-shift full bridge circuit |
| CN201910739U (en) * | 2010-12-21 | 2011-07-27 | 广东易事特电源股份有限公司 | Full-bridge phase-shift soft switching circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248575A (en) * | 2005-06-29 | 2008-08-20 | 株式会社村田制作所 | DC-DC converter |
-
2010
- 2010-12-21 CN CN201010598797.1A patent/CN102545618B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540851A (en) * | 2003-10-31 | 2004-10-27 | 哈尔滨工业大学 | Switch PWM convertor working at zero voltage and zero current of full bridge |
| CN101060284A (en) * | 2006-04-13 | 2007-10-24 | 康舒科技股份有限公司 | Soft switching phase-shift full bridge circuit |
| CN201910739U (en) * | 2010-12-21 | 2011-07-27 | 广东易事特电源股份有限公司 | Full-bridge phase-shift soft switching circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102545618A (en) | 2012-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103190064B (en) | For controlling the method for series resonance DC/DC transducer | |
| CN203942447U (en) | A kind of ZVT crisscross parallel high-gain formula DC/DC converter | |
| CN107509280B (en) | A kind of high-frequency isolation type LED drive circuit and its control method | |
| CN106487232B (en) | A kind of three level Buck converters of ZVS isolation | |
| CN100438286C (en) | Dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit | |
| CN110190752B (en) | Bidirectional CLLLC-DCX resonant converter and control method thereof | |
| CN105281576A (en) | Quasi-resonant half-bridge converter and control method thereof | |
| CN102075092A (en) | Flyback converter leakage inductance absorption and soft switching control | |
| CN108235509B (en) | A kind of single-stage LED drive circuit of integrated decompression Cuk and LLC circuit | |
| CN104158243A (en) | Uninterruptible power supply circuit and control method thereof | |
| CN106100344A (en) | A kind of LLC resonant converter with liter high voltage gain | |
| CN103904901A (en) | Phase-shift full-bridge converter circuit and control method | |
| CN103595258A (en) | Boost type soft switching resonant converter and frequency fixing control method thereof | |
| CN109149945B (en) | A kind of three port current transformers suitable for light storage direct-current grid | |
| CN105939112A (en) | High-gain quasi-switch boost DC-DC converter | |
| CN105939108A (en) | Switch inductor type quasi-switch voltage-boosting DC-DC converter | |
| CN201966806U (en) | Direct-current boost convertor with single switching tube | |
| CN110350786A (en) | A kind of multiphase is from flowing high-gain DC converter and its control strategy | |
| CN104638932A (en) | Multi-resonant converter | |
| CN210016405U (en) | Micro-grid double-active full-bridge bidirectional DC-DC converter | |
| CN106533181A (en) | Double transformer parallel series LLC resonant DC-DC converter and control method of the same | |
| CN104780692B (en) | A kind of single-stage is without the double Boost of bridge and Flyback integrated LED drive circuit | |
| CN109672332A (en) | A kind of zero ripple DC-DC converter of single tube high-gain | |
| CN206442297U (en) | Boost resonant type soft-switch converters | |
| CN201910739U (en) | Full-bridge phase-shift soft switching circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |