CN102545618A - Full-bridge phase-shifting soft switching circuit - Google Patents
Full-bridge phase-shifting soft switching circuit Download PDFInfo
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- CN102545618A CN102545618A CN2010105987971A CN201010598797A CN102545618A CN 102545618 A CN102545618 A CN 102545618A CN 2010105987971 A CN2010105987971 A CN 2010105987971A CN 201010598797 A CN201010598797 A CN 201010598797A CN 102545618 A CN102545618 A CN 102545618A
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- 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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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-shift soft switch circuit.
Background technology
Soft switch circuit is a very important part in a lot of electronic circuits, reasonably soft open with soft turn-off performance be that circuit provides abundanter performance.Soft switch circuit of the prior art has multiple implementation, but these implementations structure more complicated often, and softly open, the reliability of soft turn-off performance is not high.
Not enough to prior art, provide a kind of full-bridge phase-shift soft switch circuit very necessary to solve the prior art deficiency.
Summary of the invention
The objective of the invention is to avoid the weak point of prior art and full-bridge phase-shift soft switch circuit simple in structure, with low cost is provided.
The object of the invention is realized through following technical measures.
A kind of full-bridge phase-shift soft switch 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 negative pole of one end of the collector electrode of IGBT pipe Q1, the negative pole of diode D1, capacitor C 1, the collector electrode of IGBT pipe Q2, diode D2, an end of capacitor C 2 are connected with input Uin is anodal;
One end of the emitter of IGBT pipe Q3, the positive pole of diode D3, capacitor C 3, the emitter of IGBT pipe Q4, the positive pole of diode D4, an end of capacitor C 4 are connected with input Uin negative pole;
The other end of the emitter of IGBT pipe Q1, the positive pole of diode D1, capacitor C 1, the collector electrode of IGBT pipe Q3, the negative pole of diode D3, the other end of capacitor C 3 are connected with 2 ends of transformer T1;
The other end of the emitter of IGBT pipe Q2, the positive pole of diode D2, capacitor C 2, the collector electrode of IGBT pipe Q4, the negative pole of diode D4, the other end of capacitor C 4 are connected with an end of capacitor C 5, and 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 an end of inductance L 1, and an 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.
Said transformer T1, capacitor C 1, C2, C3 and C4 satisfy condition:
, wherein, E=(1/2) L
rI
1 2
Wherein, C
TBe the distributed capacitance of the primary coil of said transformer T1,
Said L
rBe the leakage inductance of the primary coil of said transformer T1,
I1 is the electric current of transformer T1 primary coil before the positive half cycle resonance first time;
I2 is the electric current of transformer T1 primary coil before the positive half cycle resonance second time;
T
Dead1Be the Dead Time between IGBT pipe Q1 and the IGBT pipe Q3;
T
Dead2Be the Dead Time between IGBT pipe Q2 and the IGBT pipe Q4.
The IGBT pipe Q1 that said IGBT pipe Q1 is model FGL40N120AND.
The IGBT pipe Q2 that said IGBT pipe Q2 is model FGL40N120AND.
The IGBT pipe Q3 that said IGBT pipe Q3 is model FGL40N120AND.
The IGBT pipe Q4 that said IGBT pipe Q4 is model FGL40N120AND.
Said capacitor C 5 is 250V, 4.7uH.
The primary coil of said transformer T1 and the turn ratio of secondary coil are 24:4, and said transformer T1 is primary coil leakage inductance L
rDistributed capacitance C for 15uH, primary coil
TTransformer T1 for 200nH.
Said capacitor C 2 is 370 pF, and said capacitor C 4 is 370 pF.
Said inductance L 1 is 100 uH, 100A.
A kind of full-bridge phase-shift soft switch 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 negative pole of one end of the collector electrode of IGBT pipe Q1, the negative pole of diode D1, capacitor C 1, the collector electrode of IGBT pipe Q2, diode D2, an end of capacitor C 2 are connected with input Uin is anodal; One end of the emitter of IGBT pipe Q3, the positive pole of diode D3, capacitor C 3, the emitter of IGBT pipe Q4, the positive pole of diode D4, an end of capacitor C 4 are connected with input Uin negative pole; The other end of the emitter of IGBT pipe Q1, the positive pole of diode D1, capacitor C 1, the collector electrode of IGBT pipe Q3, the negative pole of diode D3, the other end of capacitor C 3 are connected with 2 ends of transformer T1; The other end of the emitter of IGBT pipe Q2, the positive pole of diode D2, capacitor C 2, the collector electrode of IGBT pipe Q4, the negative pole of diode D4, the other end of capacitor C 4 are connected with an end of capacitor C 5, and 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 an end of inductance L 1, and an 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-shift soft switch circuit can be accomplished the soft switching function of switching tube reliably, and circuit structure is simple, and is with low cost.
Description of drawings
Utilize accompanying drawing that the present invention is further described, but the content in the accompanying drawing does not constitute any restriction of the present invention.
Fig. 1 is the electrical block diagram of a kind of full-bridge phase-shift soft switch circuit of the present invention.
Embodiment
In conjunction with following examples the present invention is further described.
embodiment 1.
As shown in Figure 1, a kind of full-bridge phase-shift soft switch 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 negative pole of one end of the collector electrode of IGBT pipe Q1, the negative pole of diode D1, capacitor C 1, the collector electrode of IGBT pipe Q2, diode D2, an end of capacitor C 2 are connected with input Uin is anodal.
One end of the emitter of IGBT pipe Q3, the positive pole of diode D3, capacitor C 3, the emitter of IGBT pipe Q4, the positive pole of diode D4, an end of capacitor C 4 are connected with input Uin negative pole.
The other end of the emitter of IGBT pipe Q1, the positive pole of diode D1, capacitor C 1, the collector electrode of IGBT pipe Q3, the negative pole of diode D3, the other end of capacitor C 3 are connected with 2 ends of transformer T1.
The other end of the emitter of IGBT pipe Q2, the positive pole of diode D2, capacitor C 2, the collector electrode of IGBT pipe Q4, the negative pole of diode D4, the other end of capacitor C 4 are connected with an end of capacitor C 5, and 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 an end of inductance L 1, and an 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.
Said transformer T1, capacitor C 1, C2, C3 and C4 satisfy condition:
Wherein, C
TBe the distributed capacitance of the primary coil of said transformer T1,
Said L
rBe the leakage inductance of the primary coil of said transformer T1,
I1 is the electric current of transformer T1 primary coil before the positive half cycle resonance first time;
I2 is the electric current of transformer T1 primary coil before the positive half cycle resonance second time;
T
Dead1Be the Dead Time between IGBT pipe Q1 and the IGBT pipe Q3;
T
Dead2Be the Dead Time between IGBT pipe Q2 and the IGBT pipe Q4.
The model FGL40N120AND of IGBT pipe Q1, Q2, Q3, Q4, said capacitor C 5 is 250V, 4.7uH, said inductance L 1 is 100 uH, 100A.
Full-bridge phase-shift soft switch circuit of the present invention, its operation principle is: circuit adopts phase-shifting control method, and in each switch periods, Q1, Q3 are turned on and off earlier, and Q2, Q4 by after turn on and off.
During positive half cycle, Q1 is by being conducting to when turn-offing, and the primary current of transformer T1 is because transformer inductance and leakage inductance, and electric current can not suddenly change, and electric current continues to keep former flow direction.So C1 is by quick charge, C3 is by repid discharge; When C3 was discharged into 0V, afterflow was carried out in the smooth conducting of D3, and the conducting of D3 simultaneously lets also voltage is 0V (diode is conduction voltage drop forward) by clamp between the collector and emitter of Q3, opens the condition of having got well of creating for Q3 realizes no-voltage.Because C1 is recharged, D1 is reversed and ends.Q4 is by being conducting to when 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 conducting of D2 simultaneously lets also voltage is 0V (diode is conduction voltage drop forward) by clamp between the collector and emitter of Q2, opens the condition of having got well of creating for Q2 realizes no-voltage.But the conducting simultaneously of secondary two arrangement diodes this moment, primary side is by short circuit, and the secondary inductance energy cannot be participated in resonance.
During negative half period, Q3 is by being conducting to when turn-offing, and transformer T1 primary current reverse flow can not be suddenlyd change equally.So C3 is by quick charge, C1 is by repid discharge; When C1 was discharged into 0V, afterflow was carried out in the smooth conducting of D1, and the conducting of D1 simultaneously lets also voltage is 0V (diode is conduction voltage drop forward) by clamp between the collector and emitter of Q1, opens the condition of having got well of creating for Q1 realizes no-voltage.Because C3 is recharged, D3 is reversed and ends.Q2 is by being conducting to when 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 conducting of D4 simultaneously lets also voltage is 0V (diode is conduction voltage drop forward) by clamp between the collector and emitter of Q4, opens the condition of having got well of creating for Q4 realizes no-voltage.But the conducting simultaneously of secondary two arrangement diodes this moment, primary side is by short circuit, and the secondary inductance energy cannot be participated in resonance.
Realize the condition that no-voltage is opened:
The no-voltage that realizes switching tube is open-minded, the electric charge on 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 the same brachium pontis.Simultaneously, consider the former limit winding electric capacity of transformer T1, also want part energy to take the electric charge on the winding distributed capacitance of the former limit of transformer away.That is to say, must satisfy:
(Q1 Q3), is used for realizing that the energy of ZVS is the energy sum in transformer leakage inductance and the output inductor for leading arm.Because the outputting inductance energy storage is very big, so ZVS is easy to realize.
(Q2 Q4), is used for realizing that the energy of ZVS is merely the energy storage of transformer leakage inductance but for lagging leg.Therefore, whether our a needs calculating primary coil leakage inductance energy storage meets the demands and gets final product.
In addition; Leading arm resonance time
must be less than the Dead Time between Q1 and the Q3, otherwise brachium pontis will lead directly to and causes the primary coil short circuit.Promptly have:
Lagging leg resonance time
also must be less than the Dead Time between Q2 and the Q4, otherwise brachium pontis will lead directly to and causes the primary coil short circuit.Promptly have:
Annotate: Lr is the transformer leakage inductance
I
1Be current value before the positive half cycle of the primary coil transformer resonance first time, I
2Be current value before the positive half cycle resonance second time.Desirable I in the practical engineering calculation
1=I
2=Ip.
So this full-bridge phase-shift soft switch circuit can be accomplished the soft switching function of switching tube reliably, and circuit structure is simple, and is with low cost.
embodiment 2.
A kind of full-bridge phase-shift soft switch, other structure is identical with embodiment 1, and difference is that capacitor C 2 is 370 pF, and said capacitor C 4 is 370 pF, and said 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.
Calculate as follows:
Primary side resonant energy:
Energy on electric capacity and the transformer:
E
1>E
2, first condition satisfies.
Resonance time:
Satisfy condition 2.
From actual debug results, this circuit can be accomplished the soft switching function of switching tube reliably, and laboratory efficient can reach 96%.Actual small lot batch manufacture overall efficiency is more than 93%.And circuit structure is simple, and is with low cost.
Should be noted that at last; Above embodiment is only in order to technical scheme of the present invention to be described but not to the restriction of protection range of the present invention; Although the present invention has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the essence and the scope of technical scheme of the present invention.
Claims (10)
1. a full-bridge phase-shift soft switch 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 negative pole of one end of the collector electrode of IGBT pipe Q1, the negative pole of diode D1, capacitor C 1, the collector electrode of IGBT pipe Q2, diode D2, an end of capacitor C 2 are connected with input Uin is anodal;
One end of the emitter of IGBT pipe Q3, the positive pole of diode D3, capacitor C 3, the emitter of IGBT pipe Q4, the positive pole of diode D4, an end of capacitor C 4 are connected with input Uin negative pole;
The other end of the emitter of IGBT pipe Q1, the positive pole of diode D1, capacitor C 1, the collector electrode of IGBT pipe Q3, the negative pole of diode D3, the other end of capacitor C 3 are connected with 2 ends of transformer T1;
The other end of the emitter of IGBT pipe Q2, the positive pole of diode D2, capacitor C 2, the collector electrode of IGBT pipe Q4, the negative pole of diode D4, the other end of capacitor C 4 are connected with an end of capacitor C 5, and 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 an end of inductance L 1, and an 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.
2. full-bridge phase-shift soft switch circuit according to claim 1 is characterized in that:
Said transformer T1, capacitor C 1, C2, C3 and C4 satisfy condition:
, wherein, E=(1/2) L
rI
1 2
；
Wherein, C
TDistributed capacitance for the primary coil of said transformer T1;
Said L
rLeakage inductance for the primary coil of said transformer T1;
I1 is the electric current of transformer T1 primary coil before the positive half cycle resonance first time;
I2 is the electric current of transformer T1 primary coil before the positive half cycle resonance second time;
T
Dead1Be the Dead Time between IGBT pipe Q1 and the IGBT pipe Q3;
T
Dead2Be the Dead Time between IGBT pipe Q2 and the IGBT pipe Q4.
3. full-bridge phase-shift soft switch circuit according to claim 2 is characterized in that:
The IGBT pipe Q1 that said IGBT pipe Q1 is model FGL40N120AND.
4. full-bridge phase-shift soft switch circuit according to claim 2 is characterized in that:
The IGBT pipe Q2 that said IGBT pipe Q2 is model FGL40N120AND.
5. full-bridge phase-shift soft switch circuit according to claim 2 is characterized in that:
The IGBT pipe Q3 that said IGBT pipe Q3 is model FGL40N120AND.
6. full-bridge phase-shift soft switch circuit according to claim 2 is characterized in that:
The IGBT pipe Q4 that said IGBT pipe Q4 is model FGL40N120AND.
7. according to any described full-bridge phase-shift soft switch circuit of claim 3 to 6, it is characterized in that: said capacitor C 5 is 250V, 4.7uH.
8. full-bridge phase-shift soft switch circuit according to claim 7 is characterized in that: the primary coil of said transformer T1 and the turn ratio of secondary coil are 24:4, and said transformer T1 is primary coil leakage inductance L
rDistributed capacitance C for 15uH, primary coil
TTransformer T1 for 200nH.
9. full-bridge phase-shift soft switch circuit according to claim 8 is characterized in that: said capacitor C 2 is 370 pF, and said capacitor C 4 is 370 pF.
10. full-bridge phase-shift soft switch circuit according to claim 9 is characterized in that: said inductance L 1 is 100 uH, 100A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010598797.1A CN102545618B (en) | 2010-12-21 | 2010-12-21 | Full-bridge phase-shifting soft switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010598797.1A CN102545618B (en) | 2010-12-21 | 2010-12-21 | Full-bridge phase-shifting soft switching circuit |
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| CN102545618B CN102545618B (en) | 2014-03-26 |
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Citations (4)
| 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 |
| US20080170418A1 (en) * | 2005-06-29 | 2008-07-17 | Takayoshi Nishiyama | Dc-dc converter |
| 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 |
-
2010
- 2010-12-21 CN CN201010598797.1A patent/CN102545618B/en active Active
Patent Citations (4)
| 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 |
| US20080170418A1 (en) * | 2005-06-29 | 2008-07-17 | Takayoshi Nishiyama | Dc-dc converter |
| 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 |
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