CN1099915A - Constant-frequency zero-voltage edge resonance switch convertor - Google Patents
Constant-frequency zero-voltage edge resonance switch convertor Download PDFInfo
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- CN1099915A CN1099915A CN93111954A CN93111954A CN1099915A CN 1099915 A CN1099915 A CN 1099915A CN 93111954 A CN93111954 A CN 93111954A CN 93111954 A CN93111954 A CN 93111954A CN 1099915 A CN1099915 A CN 1099915A
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- 239000003990 capacitor Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000002459 sustained effect Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000003071 parasitic effect Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000011162 core material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 239000003985 ceramic capacitor Substances 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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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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Abstract
This invented transducer consists of input DC power supply, energy-tranfer inductance, continued current diode, CF-ZVERS, output filter, and negative loading. Among them, CF-ZVERS is three-terminal network. Voltage-rise type, voltage-drop type, voltage-rise/drop type, single-terminal back-exciting type, single-terminal forward exciting type and CuK type CF-ZVERS transducers can be formed by substituting the said switch for the power switch in classic switch power transducer. This invention uses constant frequency PWM control mode, and its main and auxiliary switches are zero-voltage switches.
Description
The invention belongs to switch power conversion, particularly constant-frequency zero-voltage edge resonance switch convertor.
Classical switching power converter (comprising boost type, buck, step-down/up type, single-ended flyback, single-ended forward type and CuK formula etc.) adopts constant frequency pulse-width modulation (PWM) control mode, it controls simple and filter element is easy to design, but the PWM switch is owing to forcing break-make to produce crossover loss, this loss power is directly proportional with switching frequency, so can not satisfy the requirement of high frequency smallization.Zero Current Switch (ZCS) quasi resonant convertor (United States Patent (USP) 4720667) that occurs utilizes current resonance to realize zero-current switching later on, eliminate crossover loss theoretically, but the ZCS quasi resonant convertor can not be eliminated by the switch parasitic capacitance by the switch caused loss of discharging, thereby having limited switching frequency further improves, and it must adopt variable frequency control, has increased the design difficulty of filter element.Zero voltage switch (ZVS) quasi resonant convertor (United States Patent (USP) 4785387) of back appearance is improved to again and utilizes voltage resonance to realize the no-voltage conducting again, eliminate crossover loss theoretically, because it includes the switch parasitic capacitance in resonant capacitance, thereby can realize the HF switch Power Conversion, but the classical PWM switch of its voltage resonance peakedness ratio is much higher, so certainly will select the bigger high-voltage switch gear of on state resistance (or voltage) (as the withstand voltage VDMOS pipe of height) for use, this can increase switching loss undoubtedly, lower efficiency, same this quasi-converter must adopt variable frequency control, makes filter element be difficult to design.In order to overcome the deficiency of ZVS quasi resonant convertor, various partial resonance switching circuits are come out one after another, as utilize controllable resonant electric capacity or pulsactor to reach partial resonance etc., its exemplary is referring to " Resonant Converter Controlled by Variable Capacitance Devices " (IEEE PESC Record, 1990) reach " A New Class of Zero-Voltage-Switched PWM Converters " (1991 VPEC Seminar Proceedings), though the resonance switch convertor of this controllable parameters has been realized the control of PWM constant frequency, the excessive problem of unresolved switching voltage resonance peak.Document " Novel Zero-Voltage-Transition PWM Converters " (IEEE PESC Record, 1992) proposed a kind of no-voltage and shifted (ZVT) pwm converter (ZVT-PWM decompression transducer as shown in Figure 1), this converter is introduced auxiliary switch S on the basis of classical pwm converter
1The resonance branch road, thus can realize that constant frequency control can reduce switch quasi-resonance voltage peak again, but because auxiliary switch S
1Fail to realize the no-voltage conducting, further improve so limited switching frequency.In addition, be that constant frequency control and zero voltage switch resonance potential peak value amplitude limit also can be realized in the basis with half-bridge and full-bridge circuit, but circuit is too complicated.
Strong point and deficiency at above-mentioned each circuit, the present invention proposes a kind of constant-frequency zero-voltage edge resonance switch (CF-ZVERS) that is composited by main and auxiliary two switches, utilize this switch to substitute the power switch of classical switching power converter (boost type, buck, step-down/up type, single-ended flyback, single-ended forward type, CuK formula converter etc.), promptly form cluster CF-ZVERS converter, can realize simultaneously: the control of (1) constant frequency PWM; (2) main and auxiliary switch is zero voltage switch; (3) circuit is simple, is easy to realize.
CF-ZVERS converter of the present invention comprises input DC power, passes energy inductance (or transformer or electric capacity), rectification (or afterflow) diode, CF-ZVERS, output filter and load.The basic design philosophy of its core CF-ZVERS is exactly on the basis of no-voltage quasi-resonant switching, adds amplitude limiter circuit and auxiliary switch, make switching waveform at rising and falling edges generation resonance, and entire circuit still works in the square wave pattern of PWM.This CF-ZVERS switch is by main switch Sm(band backward diode D
1), auxiliary switch Sc(band backward diode D
2), resonant capacitance Cr, resonant inductance Lr and amplitude limit capacitor C c form, its structure as shown in Figure 2, wherein, switch S m, Sc are generally the VDMOS device; D
1, D
2For the parasitic diode or the external diode of VDMOS device in parallel with the parasitic diode of VDMOS device; Cr is that VDMOS device parasitic capacitance or external capacitor are in parallel with VDMOS device parasitic capacitance; Lr is that switch inductive load leakage inductance or external inductance are connected with switch inductive load leakage inductance; Cc is enough big so that its voltage keeps constant substantially.This constant-frequency zero-voltage edge resonance switch (CF-ZVERS) is a three-terminal network, its main switch Sm(band backward diode D
1) be (2) end with an end after resonant capacitance Cr is in parallel, the other end is with backward diode D with auxiliary switch Sc(
2) the end back that links to each other with resonant inductance Lr again after linking to each other hold for (1), after linking to each other with amplitude limit capacitor C c, the other end of auxiliary switch Sc is (3) end, (3) termination constant voltage substitutes classical switching power converter power switch with (1), (2) end and can realize boost type, buck, step-down/up type, single-ended flyback, single-ended forward type and CuK formula constant-frequency zero-voltage edge resonance switch convertor.
Be example with boost type CF-ZVERS converter Fig. 4 below, CF-ZVERS converter operation principle is described.Switch drive waveform sequential is seen Fig. 3.In 0 moment, Sc is in and ends, and Sm disconnects, and the Vr linearity rises to V
o, D
fConducting, at this moment, Sm and Sc all end, and resonance takes place until t in Lr and Cr
1Constantly; Vr reaches Vc, D
2The nature conducting is at D
2Before the last current reversal, the conducting of Sc no-voltage (is without loss of generality hypothesis Sc and D among Fig. 4
2Conducting simultaneously), the Vr amplitude limit is at Vc, Lr be reversed charging up to Sc disconnect (in this interval, Ir current reversal, D
2Naturally disconnect); At t
2Constantly, Sc disconnects, and Lr, Cr be resonance once more, forces Vr to drop to O; t
3Constantly, D
1The nature conducting, Sm conducting then (is without loss of generality hypothesis Sm and D among Fig. 4
1Conducting simultaneously), Ir is by V
oLinear-charging is until reaching Im, D
4End, work as t
sConstantly, Sm turn-offs, and circuit enters following one-period.
Find out that by above-mentioned analysis switch S m and Sc are the no-voltage conducting and end, and all be operated in the no spike square wave pattern of low-voltage that it is withstand voltage only to be 2/5～3/5 of ZVS quasi resonant convertor power switch.Because Sc can be at D
2Be conducting to some conductings arbitrarily before of its current reversal, under the prerequisite that guarantees the conducting of Sc no-voltage, can be chosen as a constant fully by the end of the time difference of Sc conducting from Sm.In like manner, also can be designed to constant from Sc by the end of the time difference of Sm conducting.Therefore, the front and back of the driving pulse of Sm and Sc reach the purpose of regulating output by changing its duty ratio along changing synchronously under the condition of fixed switching frequency.
Adopt CF-ZVERS converter of the present invention to have following advantage: (1) is because main and auxiliary switch works in the no spike square wave pattern of low-voltage, so can select the little low withstand voltage VDMOS device of on state resistance for use, like this, conversion efficiency can be improved on the one hand, also product cost can be reduced on the other hand; (2) main and auxiliary switch is zero voltage switch, has eliminated the crossover loss power that is directly proportional with frequency, so adapt to the requirement of high frequency small Power Conversion, switching frequency can reach more than the 1MHz; (3) adopt the constant frequency PWM control technology to alleviate the filtering burden, make filter element be easy to design; (4) because the amplitude limit branch road in amplitude limit, also plays the effect that magnetic core resets, make the converter work duty ratio can be greater than 50%, so it has very wide voltage stabilized range; (5) owing to lower edge on the resonance can be designed more much smallerly than switch periods, satisfying under the zero voltage switch condition, switch inductive load leakage inductance size is very little to the influence of converter operating characteristic, so circuit simply is easy to produce in batches.
Accompanying drawing and description of drawings:
Fig. 1 no-voltage transfer switch (ZVT-PWM) decompression transducer schematic diagram
Among the figure: the S main switch; S
1Auxiliary switch; The Vg input DC power; The Lr resonant inductance; Cr, C
j; Resonant capacitance; L
fPass the energy inductance; D
fFly-wheel diode; C
oOutput filter capacitor; The R load resistance.
Fig. 2 constant-frequency zero-voltage edge resonance switch of the present invention (CF-ZVERS) schematic diagram
Among the figure: the Sm main switch; The Sc auxiliary switch; D
1, D
2Backward diode; The Cr resonant capacitance; Cc amplitude limit electric capacity; The Lr resonant inductance.
Fig. 3: the drive waveforms sequential chart of Sm, Sc among Fig. 2
Among the figure: t
1, t
3-t
1And t
3Be steady state value.
Fig. 4: boost type constant-frequency zero-voltage edge resonance switch (CF-ZVERS) converter principle figure
Among the figure: Sm is VDMOS main switch (band backward diode D
1)
Sc is VDMOS auxiliary switch (band backward diode D
2)
The Cr resonant capacitance; The Lr resonant inductance; Cc amplitude limit electric capacity; The Vg input DC power; The Vc limiting voltage; V
oOutput voltage; Lm passes the energy inductance; C
oOutput filter capacitor; The R load resistance; D
fFly-wheel diode.
Fig. 5: single-ended flyback constant-frequency zero-voltage edge resonance switch convertor schematic diagram
Among the figure: the Vg input voltage; V
oOutput voltage; T isolating transformer (core material H
7C
4); Sm main switch, Sc auxiliary switch are IRF530 VDMOS pipe; D
1, D
2Parasitic diode for IRE530 VDMOS pipe; D
fBe the B1545 fly-wheel diode; The Cr resonant capacitance is the junction capacitance of IRF530 VDMOS pipe; Cc, C
oBe leaded multilayer ceramic capacitor; The R load resistance; 1 is close loop control circuit.
Further specify the present invention as an example with single-ended flyback constant-frequency zero-voltage edge resonance switch (CF-ZVERS) converter shown in Figure 5 below, its Sm, Sc are IRF530 VDMOS pipe, D
1, D
2Be its parasitic diode, Cr is its junction capacitance, Cc and C
oBe respectively the leaded multilayer ceramic capacitor of 1u and 3u, R is 2.9 Ω, and isolating transformer T core material is H
7C
4, Lr is a transformer leakage inductance, and output voltage is 12V, and 1 is closed control circuit in its dotted line, and it is made of buffer circuit, error amplifier, PWM, two tunnel phase shifts and drive circuit, and its output desired voltage waveform is as shown in Figure 3.When input voltage is elected 24V～60V as, its duty ratio changes from 62%～32%, and conversion efficiency is 87.9% when Vg=36V.Table 1 example has gone out the comparison of this example with corresponding Z VS quasi resonant convertor switching voltage peak value, and it can be seen from the table, the resonance potential peak value of this example is much smaller, only is its about 1/2.
Claims (1)
1, a kind of constant-frequency zero-voltage edge resonance switch convertor is by input DC power Vg, biography energy inductance L m, sustained diode
f, power switch, output filter and load form, it is characterized in that:
(1) power switch is by main switch and the compound three-terminal network of forming of auxiliary switch, and its main switch Sm (is with backward diode D
1) be (2) end with an end after resonant capacitance Cr is in parallel, the other end and auxiliary switch Sc (are with backward diode D
2) the end back that links to each other with resonant inductance Lr again after linking to each other hold for (1), after linking to each other with amplitude limit capacitor C c, the other end of auxiliary switch Sc is (3) end, (3) termination constant voltage, with the power switch of (1), the alternative classical switching power converter of (2) end, can realize boost type, buck, step-down/up type, single-ended flyback, single-ended forward type and CuK formula constant-frequency zero-voltage edge resonance switch power inverter;
(2) main and auxiliary switch S m, Sc are zero voltage switch, and being operated in low-voltage does not have the spike square wave pattern, adopt the synchronous pulse width modulation controlled mode of constant frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93111954A CN1033121C (en) | 1993-08-31 | 1993-08-31 | Constant-frequency zero-voltage edge resonance switch convertor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93111954A CN1033121C (en) | 1993-08-31 | 1993-08-31 | Constant-frequency zero-voltage edge resonance switch convertor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1099915A true CN1099915A (en) | 1995-03-08 |
| CN1033121C CN1033121C (en) | 1996-10-23 |
Family
ID=4989703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93111954A Expired - Fee Related CN1033121C (en) | 1993-08-31 | 1993-08-31 | Constant-frequency zero-voltage edge resonance switch convertor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033121C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065688C (en) * | 1995-03-13 | 2001-05-09 | 电子功率调节公司 | Unipolar series resonant converter |
| WO2003052915A1 (en) * | 2001-12-03 | 2003-06-26 | Hutang Fang | A digital power converting method and device with zero voltage |
| CN103023313A (en) * | 2012-12-18 | 2013-04-03 | 福州大学 | Voltage division step-down Cuk converter circuit |
| CN106100352A (en) * | 2016-08-05 | 2016-11-09 | 广州金升阳科技有限公司 | Flyback control circuit and control method |
| CN111262429A (en) * | 2020-03-17 | 2020-06-09 | 阳光电源股份有限公司 | Direct current conversion circuit and photovoltaic inverter |
-
1993
- 1993-08-31 CN CN93111954A patent/CN1033121C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065688C (en) * | 1995-03-13 | 2001-05-09 | 电子功率调节公司 | Unipolar series resonant converter |
| WO2003052915A1 (en) * | 2001-12-03 | 2003-06-26 | Hutang Fang | A digital power converting method and device with zero voltage |
| US7215040B2 (en) | 2001-12-03 | 2007-05-08 | Hutang Fang | Half-bridge converter with zero-voltage switching and snubber |
| CN103023313A (en) * | 2012-12-18 | 2013-04-03 | 福州大学 | Voltage division step-down Cuk converter circuit |
| CN103023313B (en) * | 2012-12-18 | 2015-02-04 | 福州大学 | Voltage division step-down Cuk converter circuit |
| CN106100352A (en) * | 2016-08-05 | 2016-11-09 | 广州金升阳科技有限公司 | Flyback control circuit and control method |
| CN106100352B (en) * | 2016-08-05 | 2019-02-05 | 广州金升阳科技有限公司 | Flyback control circuit and control method |
| CN111262429A (en) * | 2020-03-17 | 2020-06-09 | 阳光电源股份有限公司 | Direct current conversion circuit and photovoltaic inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1033121C (en) | 1996-10-23 |
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