CN101534061A - A double-isolation boosting multi-input direct current convertor - Google Patents
A double-isolation boosting multi-input direct current convertor Download PDFInfo
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Abstract
The invention relates to a double-isolation boosting multi-input direct current convertor. The circuit structure thereof is formed by connecting multiple active clamping high frequency inverter circuits which are isolated from one another and have input LC filters and energy storage inductors with a shared output rectifying filter circuit through a multi-input single-output high frequency transformer with. Each output end of the high frequency transformer is connected with the output end of each high frequency inverter circuit one by one. The output end of the high frequency transformer is connected with the input end of the output rectifying filter circuit. The invention has the input direct current electric sources in the same place or different places, double isolations among the high frequency inverter circuits and between the input and the output, and strong voltage matching capacity. Multiple input electric sources supply power according at the same time or according to different time, and the circuit topology is simple. The high frequency transformer and an output loop are shared. The power density is high, the conversion efficiency is high, the input current has small ripple, the reliability is high in the load short circuit, and the cost is low. The invention provides a key technique for distributed power supply system associatively supplying power by multiple reproducible energy sources.
Description
Technical field
Double-isolation boosting multi-input direct current convertor involved in the present invention belongs to the Technics of Power Electronic Conversion technology.
Background technology
DC converter is the applied power semiconductor device, and a kind of direct current energy is transformed into the static converting means of another kind of direct current energy, uses for DC load.The converter of high frequency electrical isolation is arranged between output DC load and input DC power, be called isolated DC transducer.The high frequency electrical isolation element has mainly played following effect in converter: 1) realized the electrical isolation between converter output and the input, improved the security reliability and the Electro Magnetic Compatibility of converter operation; 2) realized coupling between converter output voltage and the input voltage, realized promptly that the output voltage of converter can be higher than, be equal to or less than the technique effect of input voltage that its range of application has obtained widening greatly; 3) when the operating frequency of high frequency transformer or high frequency storage transformer when 20kHz is above, its volume, weight greatly reduce, audio noise has been eliminated.Therefore, be the secondary transformation of electrical energy occasion of main dc power supply with DC generator, storage battery, solar cell and fuel cell etc., isolated DC transducer has important use and is worth.
Regenerative resources (being also referred to as green energy resource) such as solar energy, wind energy, tidal energy and geothermal energy have cleanliness without any pollution, cheapness, advantage such as reliable, abundant, thereby are with a wide range of applications.Because fossil energy (the non-renewable energy) growing tensions such as oil, coal and natural gas, environmental pollution are serious, cause the production of global warming and nuclear energy can produce reasons such as nuke rubbish and contaminated environment again, the development and utilization of regenerative resource more and more is subject to people's attention.Renewable energy power generation mainly contains types such as photovoltaic, wind-force, fuel cell, waterpower, underground heat, all exist the supply of electric power instability, discontinuous, with defectives such as weather conditions variations, therefore need to adopt various energy resources to unite the distributed power supply system of power supply.
Traditional regenerative resource distributed power supply system, as shown in Figure 1.This system normally adopts a plurality of single input DC converter that the direct current of renewable energy power generation equipment such as solar cell, fuel cell, wind-driven generator output is transformed into the needed common DC bus voltage U of load converter
Dc, and then by the load converter that links to each other with dc bus with U
DcBe transformed into needed direct current of load or alternating voltage, select the type of load converter according to the character of load.In order to make the renewable energy power generation part can co-ordination, various energy resources must carry out respectively being connected on the public dc bus behind the transformation of electrical energy, therefore need a plurality of single input DC converter and in addition in parallel, thereby have defectives such as circuit structure complexity, cost height at output.
In order to simplify circuit structure, can replace a plurality of single input DC converter with a multi-input direct current converter, form novel regenerative resource distributed power supply system, as shown in Figure 2.Multi-input direct current converter allows the various energy resources input, and the character of input source, amplitude and characteristic can be identical, and is also can difference very big.This electric power system has that circuit structure is succinct, cost is low, in HF switch cycle a plurality of input sources can be simultaneously or timesharing powers to the load, can improve system stability and flexibility, can realize the advantages such as preferential utilization of the energy.
Therefore, seeking a class, to allow multiple regenerative resource to unite the multi-input direct current converter of power supply extremely urgent, for the simplified system circuit structure, reduce cost, allow a HF switch in the cycle a plurality of input sources simultaneously or the timesharing preferential utilization that powers to the load, improve the stability of system and flexibility, realization regenerative resource will have crucial meaning.
Summary of the invention
The present invention seeks to provide a kind of have input DC power altogether or not altogether, between the high-frequency inverter circuit and twoly between output and the input isolate, the double-isolation boosting multi-input direct current convertor of advantages such as strong, a plurality of input power supply while of voltage matches ability or time sharing power supply, succinct, the shared high frequency transformer of circuit topology and output loop, power density height, conversion efficiency height, input current ripple are little, reliability height during load short circuits, cost is low, application prospect is extensive.
Double-isolation boosting multi-input direct current convertor of the present invention, be with a plurality of mutual isolation by the high frequency transformer of the single output of input more than, active-clamp high-frequency inverter circuit and a shared output rectifier and filter of having input LC filter and energy storage inductor connect formation, each input of high frequency transformer and the corresponding one by one connection of the output of each high-frequency inverter circuit, the output of high frequency transformer and the input of output rectifier and filter link, described each have the active-clamp high-frequency inverter circuit of input LC filter and energy storage inductor by input LC filter, energy storage inductor, active clamping circuir, high-frequency inverter cascade in regular turn constitutes, described output rectifier and filter is by hf rectifier, output filter capacitor cascade in regular turn constitutes, and described active clamping circuir is made of power switch and capacitances in series.
The present invention is with a plurality of single input DC converter circuit structure of output parallel connection in traditional regenerative resource distributed power supply system, be configured to the double-isolation boosting multi-input direct current convertor circuit structure, proposed double-isolation boosting multi-input direct current convertor new ideas, circuit structure and topological family.
Double-isolation boosting multi-input direct current convertor of the present invention, can with a plurality of altogether or not altogether, unsettled input direct voltage is transformed into a required voltage size, stable, high-quality output dc voltage does not have input DC power altogether or not altogether, between the high-frequency inverter circuit and two isolation between output and the input, the voltage matches ability is strong, a plurality of input power supplys whiles or time sharing power supply, circuit topology is succinct, shared high frequency transformer and output loop, the power density height, the conversion efficiency height, the input current ripple is little, reliability height during load short circuits, cost is low, advantages such as application prospect is extensive.The combination property of double-isolation boosting multi-input direct current convertor will be more superior than a plurality of single input DC converter of traditional output parallel connection.
Description of drawings
Fig. 1, traditional regenerative resource distributed power supply system.
Fig. 2, novel regenerative resource distributed power supply system.
Fig. 3, the double-isolation boosting multi-input direct current convertor theory diagram.
Fig. 4, the double-isolation boosting multi-input direct current convertor circuit structure diagram.
Fig. 5, principle oscillogram when the same duty ratio of double-isolation boosting multi-input direct current convertor is powered.
Fig. 6, principle oscillogram during the power supply of double-isolation boosting multi-input direct current convertor different duty.
Fig. 7, double-isolation boosting multi-input direct current convertor circuit topology example one---recommend the full wave type circuit theory diagrams.
Fig. 8, double-isolation boosting multi-input direct current convertor circuit topology example two---push-pull bridge circuit theory diagrams.
Fig. 9, double-isolation boosting multi-input direct current convertor circuit topology example three---half-bridge full wave type circuit theory diagrams.
Figure 10, double-isolation boosting multi-input direct current convertor circuit topology example four---half-bridge bridge circuit schematic diagram.
Figure 11, double-isolation boosting multi-input direct current convertor circuit topology example five---monofocal circuit theory diagrams.
Figure 12, double-isolation boosting multi-input direct current convertor circuit topology example six---full-bridge full wave type circuit theory diagrams.
Figure 13, double-isolation boosting multi-input direct current convertor circuit topology example seven---full-bridge bridge circuit schematic diagram.
Figure 14 recommends full wave type, push-pull bridge, half-bridge full wave type, the instantaneous voltage FEEDBACK CONTROL block diagram when the same duty ratio of half-bridge bridge-type double-isolation boosting multi-input direct current convertor is powered.
Figure 15 recommends full wave type, push-pull bridge, half-bridge full wave type, the instantaneous voltage feedback control principle oscillogram when the same duty ratio of half-bridge bridge-type double-isolation boosting multi-input direct current convertor is powered.
Figure 16, master-slave mode voltage, current instantaneous value FEEDBACK CONTROL block diagram during the power supply of monofocal double-isolation boosting multi-input direct current convertor different duty.
Figure 17, master-slave mode voltage, current instantaneous value feedback control principle oscillogram during the power supply of monofocal double-isolation boosting multi-input direct current convertor different duty.
Figure 18, master-slave mode voltage, current instantaneous value FEEDBACK CONTROL block diagram when full-bridge full wave type, the power supply of full-bridge bridge-type double-isolation boosting multi-input direct current convertor different duty.
Figure 19, master-slave mode voltage, current instantaneous value feedback control principle oscillogram when full-bridge full wave type, the power supply of full-bridge bridge-type double-isolation boosting multi-input direct current convertor different duty.
Embodiment
Below in conjunction with drawings and Examples the present invention is described further.
The double-isolation boosting multi-input direct current convertor circuit structure, be with a plurality of mutual isolation by the high frequency transformer of the single output of input more than, active-clamp high-frequency inverter circuit and a shared output rectifier and filter of having input LC filter and energy storage inductor connect formation, each input of high frequency transformer and the corresponding one by one connection of the output of each high-frequency inverter circuit, the output of high frequency transformer and the input of output rectifier and filter link, described each have the active-clamp high-frequency inverter circuit of input LC filter and energy storage inductor by input LC filter, energy storage inductor, active clamping circuir, high-frequency inverter cascade in regular turn constitutes, described output rectifier and filter is by hf rectifier, output filter capacitor cascade in regular turn constitutes, and described active clamping circuir is made of power switch and capacitances in series.
Principle waveform when principle waveform and different duty are powered when double-isolation boosting multi-input direct current convertor theory diagram, circuit structure, the power supply of same duty ratio is respectively shown in Fig. 3,4,5,6.Because double-isolation boosting multi-input direct current convertor is a current type converter, its principle is equivalent to the stack of a plurality of booster type list input DC converter at output end current, i.e. output voltage U o and input direct voltage (U
I1, U
I2..., U
In), the high frequency transformer turn ratio (N
2/ N
11, N
2/ N
12..., N
2/ N
1n), duty ratio (D
1, D
2..., D
n) between the pass be U
o=U
I1N
2/ [N
11(1-D
1)]=U
I2N
2/ [N
12(1-D
2)]=...=U
InN
2/ [N
1n(1-Dn)].U
oAt suitable duty ratio (D
1, D
2..., D
n) and the high frequency transformer turn ratio (N
2/ N
11, N
2/ N
12..., N
2/ N
1n) time can greater than, be equal to or less than U
I1, U
I2..., U
InSo the high frequency transformer in this quasi-converter circuit structure has not only played security reliability and the Electro Magnetic Compatibility that improves the converter operation, the more important thing is the effect of having played matched output voltage and input voltage, realized that promptly the output voltage of converter is higher than, be equal to or less than input direct voltage U
I1, U
I2..., U
InTechnique effect, its range of application has obtained widening greatly.Because 0＜D
1, D
2..., D
n＜1, so U
oU
I1N
2/ N
11, U
oU
I2N
2/ N
12..., U
oU
InN
2/ N
1n, i.e. output dc voltage U
oAlways be higher than input direct voltage (U
I1, U
I2..., U
In) and the high frequency transformer turn ratio (N
2/ N
11, N
2/ N
12..., N
2/ N
1n) product (U
I1N
2/ N
11, U
I2N
2/ N
12..., U
InN
2/ N
1n); Again owing to the n of converter isolates individual having between the active-clamp high-frequency inverter circuit of importing LC filter and energy storage inductor mutually, isolate mutually between converter output DC load and the input power supply, so this quasi-converter is called double-isolation boosting multi-input direct current convertor.High-frequency inverter in this circuit structure is made of a plurality of two quadrant high frequency power switches that can bear bi-directional voltage stress, unidirectional current stress, and hf rectifier is made of one or more high-frequency rectification diodes.When the same duty ratio of this circuit structure is powered, D
1=D
2=...=D
n, mean that only there is the single-mode of simultaneously DC load being powered in n input source a HF switch in the cycle; During the different duty power supply, D
1≠ D
2≠ ... ≠ D
n, mean n input source a HF switch cycle memory at the same time with the two kind patterns of timesharing to DC load power supply.
When power supply during to load transfer power, high-frequency inverter is with energy storage inductor L
1, L
2..., L
nIn dither direct current i
L1, i
L2..., i
LnBe reverse into the high-frequency pulse current i of unipolarity binary states or bipolarity three-state
N11, i
N12..., i
NIn, after high frequency transformer T electrical isolation, transmission and currents match, obtain many level high-frequencies pulse current i of unipolarity binary states or bipolarity three-state
N2, hf rectifier and output filter capacitor C
fWith its rectification, be filtered into high-quality output dc voltage U
o, energy storage inductor L
1, L
2..., L
nIn dither direct current i
L1, i
L2..., i
LnThrough input LC filter L
I1-C
I1, L
I2-C
I2..., L
In-C
InThe back is at input DC power U
I1, U
I2..., U
InIn can obtain level and smooth input dc power stream I
I1, I
I2..., I
In, S
C1With C
C1, S
C2With C
C2..., S
CnWith C
CnN the active clamping circuir that series connection constitutes is used for suppressing the leakage inductance obstruction energy storage inductor L of high frequency transformer n former limit winding respectively
1, L
2..., L
nCaused due to voltage spikes when energy discharges.
Double-isolation boosting multi-input direct current convertor of the present invention, because a shared high frequency transformer and an output rectifier and filter, there is important difference in a plurality of single input DC converter circuit structures in parallel with output in the traditional regenerative resource distributed power supply system.Therefore, converter of the present invention is creative, have between the high-frequency inverter circuit and output and input between reliability height during little, the load short circuits of pair isolation, conversion efficiency height (meaning that energy loss is little), power density height (mean volume, weight little), input current ripple, advantage such as cost is low, application prospect is extensive, build today energy-saving, conservation-minded society vigorously advocating, have more important value.
The double-isolation boosting multi-input direct current convertor circuit topology embodiment of family is shown in Fig. 7,8,9,10,11,12,13.Fig. 7 is for recommending the full wave type circuit, and Fig. 8 is the push-pull bridge circuit, and Fig. 9 is a half-bridge full wave type circuit, and Figure 10 is the half-bridge bridge circuit, and Figure 11 is the monofocal circuit, and Figure 12 is a full-bridge full wave type circuit, and Figure 13 is the full-bridge bridge circuit.N among Figure 11
31With D
C1, N
32With D
C2..., N
3nWith D
CnThe branch road that series connection constitutes is used for realizing the magnetic reset of high frequency transformer T.From the high-frequency inverter side, the voltage stress of push-pull type, half bridge circuit high frequency power switch is the twice (2U that converts the output voltage values on former limit
oN
11/ N
2, 2U
oN
12/ N
2..., 2U
oN
1n/ N
2), the voltage stress of full bridge circuit high frequency power switch is the output voltage values (U that converts former limit
oN
11/ N
2, U
oN
12/ N
2..., U
oN
1n/ N
2).From the output hf rectifier, the voltage stress of full wave type circuit high-frequency rectification diode is the output voltage values (2U of twice
o), transformer secondary winding utilization is low; The voltage stress of bridge circuit high-frequency rectification diode is output voltage values (U
o), transformer secondary winding utilization height.Power switch S
C1, S
C2..., S
CnVoltage stress be the output voltage values (U that converts former limit
oN
11/ N
2, U
oN
I2/ N
2..., U
oN
1n/ N
2), only its voltage stress is output voltage values and the half input voltage value sum (U that converts former limit in half-bridge full wave type, half-bridge bridge circuit
oN
11/ N
2+ U
I1/ 2, U
oN
12/ N
2+ U
I2/ 2 ..., U
oN
1n/ N
2+ U
In/ 2).Be applicable to low-voltage, high-current output transform occasion so recommend full wave type, half-bridge full wave type, full-bridge full wave type circuit, push-pull bridge, half-bridge bridge-type, full-bridge bridge circuit are applicable to high voltage-small current output transform occasion, and monofocal circuit high frequency power switch S
11, S
21..., S
N1Voltage stress be the output voltage values (U that converts former limit
oN
11/ N
2, U
oN
12/ N
2..., U
oN
1n/ N
2), the high frequency power switch S
12, S
22..., S
N2Voltage stress be to convert the output voltage values on former limit and convert the input voltage value (U on former limit
oN
11/ N
2And U
iN
11/ N
31, U
oN
12/ N
2And U
iN
12/ N
31..., U
oN
1n/ N
2And U
iN
1n/ N
3n) in higher value, so be applicable to low pressure input, low pressure output transform occasion.That monofocal, semibridge system, push-pull type and full bridge circuit are applicable to respectively is little, in, high-power conversion occasion.This circuit topology family be applicable to a plurality of altogether or not altogether, unsettled input direct voltage is transformed into a required voltage size, stable, high-quality output dc voltage, can be used to realize to have the multi-input direct current converter in the novel renewable energy distributed power supply system of premium properties and wide application prospect, as photovoltaic cell 40-60VDC/360VDC, 10kw Proton Exchange Membrane Fuel Cells 85-120V/360VDC, middle-size and small-size family wind power generation 24-36-48VDC/360VDC, multiple input sources such as large-scale wind generating 1000VDC/360VDC are powered to DC load.
Recommend full wave type, push-pull bridge, half-bridge full wave type, when half-bridge bridge-type double-isolation boosting multi-input direct current convertor is used for realizing that various energy resources is powered simultaneously, can adopt the identical instantaneous voltage feedback control strategy of n road duty ratio, its control block diagram and control principle waveform are respectively shown in Figure 14,15.Output voltage feedback signal U with converter
OfWith benchmark sinusoidal voltage U
rCompare, its error voltage has obtained error voltage amplifying signal U behind proportional and integral controller
e, U
eWith zigzag carrier wave u
cHand over and cut, obtained signal u
HfWith u
HfSignal respectively with u
cTrailing edge two divided-frequency signal u
SyAnd reverse signal u
SyMutually or and behind drive circuit 1,2, obtained power switch S respectively
11, S
21..., S
N1And S
12, S
22..., S
N2Drive signal; u
HfReverse signal behind rising edge delay shaping circuit and drive circuit 3, obtained power switch S
C1, S
C2..., S
CnDrive signal.
The monofocal double-isolation boosting multi-input direct current convertor, can be used to realize various energy resources while or time sharing power supply, can adopt the 1st, 2 ..., n-1 road power output is fixed and the n road replenishes master-slave mode voltage, the current instantaneous value feedback control strategy of the required deficit power of load, its control block diagram and control principle waveform are respectively shown in Figure 16,17.With converter 1,2 ..., n-1 input current feedback signal I
I1f, I
I2f..., I
I (n-1) fRespectively with reference current I
I1r, I
I2r..., I
I (n-1) rCompare, its error signal has obtained error current amplifying signal I behind proportional and integral controller
1e, I
2e..., I
(n-1) e, with the output voltage feedback signal U of converter
OfWith reference voltage U
rCompare, its error signal has obtained error voltage amplifying signal U behind proportional and integral controller
e, I
1e, I
2e..., I
(n-1) e, U
eRespectively with zigzag carrier wave u
cHand over and cut, obtained pwm signal u
Hf11, u
Hf21..., u
Hfn1And reverse signal u
Hf12, u
Hf22..., u
Hfn2These pwm signals and reverse signal thereof through drive circuit 11,21 ..., n1 and 12,22 ..., obtained power switch S respectively behind the n2
11, S
21..., S
N1And S
12, S
22..., S
N2Drive signal, u
Hf12, u
Hf22..., u
Hfn2Through rising edge delay shaping circuit and drive circuit c1, c2 ..., obtained power switch S respectively behind the cn
C1, S
C2..., S
CnDrive signal.
Full-bridge full wave type, full-bridge bridge-type double-isolation boosting multi-input direct current convertor, when can be used to realize various energy resources or time sharing power supply, can adopt the 1st, 2 ..., n-1 road power output is fixed and the n road replenishes master-slave mode voltage, the current instantaneous value feedback control strategy of the required deficit power of load, its control block diagram and control principle waveform are respectively shown in Figure 18,19.With converter 1,2 ..., n-1 input current feedback signal I
I1f, I
I2f..., I
I (n-1) fRespectively with reference current I
I1r, I
I2r..., I
I (n-1) rCompare, its error signal has obtained error current amplifying signal I behind proportional and integral controller
1e, I
2e..., I
(n-1) e, with the output voltage feedback signal U of converter
OfWith reference voltage U
rCompare, its error signal has obtained error voltage amplifying signal U behind proportional and integral controller
e, I
1e, I
2e..., I
(n-1) e, U
eRespectively with zigzag carrier wave u
cHand over and cut, obtained pwm signal u
Hf1, u
Hf2..., u
HfnZigzag carrier wave u
cBehind the trailing edge frequency-halving circuit, obtained signal u
SyAnd reverse signal u
Sy, u
Sy, u
SyBehind drive circuit 1,2, just obtained power switch S respectively
12, S
22..., S
N2And S
11, S
21..., S
N1Drive signal; u
Hf1, u
Hf2..., u
HfnRespectively with signal u
SyObtained pwm signal u behind the phase XOR
Hf13, u
Hf23..., u
Hfn3And reverse signal u
Hf14, u
Hf24..., u
Hfn4, u
Hf13, u
Hf23..., u
Hfn3And reverse signal u
Hf14, u
Hf24..., u
Hfn4Through drive circuit 13,23 ..., n3 and 14,24 ..., obtained power switch S respectively behind the n4
13, S
23..., S
N3And S
14, S
24..., S
N4Drive signal.u
Hf1, u
Hf2..., u
NfnReverse signal through rising edge delay time shaping, drive circuit c1, c2 ..., obtain power switch S respectively behind the cn
C1, S
C2..., S
CnDrive signal.
Therefore, when input voltage or load variations, by regulating reference voltage U
rWith reference current I
I1r, I
I2r..., I
I (n-1) r, promptly regulated error voltage signal U
eWith error current signal I
1e, I
2e..., I
(n-1) eChange duty ratio D or phase shifting angle θ, just can realize the stable of double-isolation boosting multi-input direct current convertor output voltage, input current (power output) and regulate.
For recommending full wave type, push-pull bridge, half-bridge full wave type, half-bridge bridge circuit shown in Fig. 7～10, power switch S
11With S
12, S
21With S
22..., S
N1With S
N2180 ° of drive signal phase phasic differences, duty ratio is identical and greater than 0.5, at T
sIts common ON time is T in/2
Com=(T
s/ 2) θ/180 ° (T
sBe the HF switch cycle), converter duty ratio D
1=D
2=...=D
n=T
Com/ (T
s/ 2)=θ/180 ° (0＜θ＜180 ° be the pairing angle of common ON time); For monofocal circuit shown in Figure 11, D
1=TON
1/ T
s, D
2=T
ON2/ T
s..., D
n=T
ONn/ T
sBe respectively power switch S
11, S
21..., S
N1Duty ratio; For full-bridge full wave type shown in Figure 12,13, full-bridge bridge circuit, all power switch duty ratios are 0.5, and last brachium pontis power switch drive signal is anti-phase each other, and following brachium pontis power switch drive signal is anti-phase each other, power switch S
14, S
24..., S
N4Drive signal is with respect to power switch S
11, S
21..., S
N1Drive signal and power switch S
13, S
23..., S
N3Drive signal is with respect to power switch S
12, S
22..., S
N2The phase shift of drive signal is θ respectively
1, θ
2..., θ
n, converter duty ratio D
1=T
Coml/ (T
s/ 2)=θ
1/ 180 °, D
2=T
Com2/ (T
s/ 2)=θ
2/ 180 ° ..., D
n=T
Comn/ (T
s/ 2)=θ n/180 ° (0＜θ
1, θ
2..., θ
n＜180 ° is common ON time T
Com1, T
Com2..., T
ComnPairing angle).
Claims (2)
1. double-isolation boosting multi-input direct current convertor, it is characterized in that: this converter by the high frequency transformer of the single output of input more than with a plurality of mutual isolation, active-clamp high-frequency inverter circuit and a shared output rectifier and filter of having input LC filter and energy storage inductor connect formation, each input of high frequency transformer and the corresponding one by one connection of the output of each high-frequency inverter circuit, the output of high frequency transformer and the input of output rectifier and filter link, described each have the active-clamp high-frequency inverter circuit of input LC filter and energy storage inductor by input LC filter, energy storage inductor, active clamping circuir, high-frequency inverter cascade in regular turn constitutes, described output rectifier and filter is by hf rectifier, output filter capacitor cascade in regular turn constitutes, and described active clamping circuir is made of power switch and capacitances in series.
2. double-isolation boosting multi-input direct current convertor according to claim 1 is characterized in that: the circuit topology of described double-isolation boosting multi-input direct current convertor is monofocal, recommend full wave type, push-pull bridge, half-bridge full wave type, half-bridge bridge-type, full-bridge full wave type, full-bridge bridge circuit.
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Application publication date: 20090916 Assignee: Avida (Xiamen) Technology Co.,Ltd. Assignor: FUZHOU University Contract record no.: X2023980042928 Denomination of invention: Dual isolation boost type multi input DC converter Granted publication date: 20110907 License type: Common License Record date: 20230928 |