CN102832821B - Combined DC-DC (direct current-direct current) converter - Google Patents
Combined DC-DC (direct current-direct current) converter Download PDFInfo
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- CN102832821B CN102832821B CN201210321351.3A CN201210321351A CN102832821B CN 102832821 B CN102832821 B CN 102832821B CN 201210321351 A CN201210321351 A CN 201210321351A CN 102832821 B CN102832821 B CN 102832821B
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- 239000002131 composite material Substances 0.000 claims description 4
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- 238000011084 recovery Methods 0.000 abstract description 3
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Abstract
The invention discloses a combined DC-DC (direct current-direct current) converter and relates to the technical field of power generating inversion. N power switch tubes with the same parameter are connected in parallel beside the primary winding of a transformer; after the ends with the same name and the ends with different names on the secondary winding of the transformer are connected in series, the secondary winding is connected with a rectification circuit; absorption circuits are connected in parallel with the two ends of the power switch tubes and are connected with an energy recovery circuit; each absorption circuit consists of a capacitor and a diode; the two ends of each capacitor are connected to the two ends of the primary side of a boosting transformer in a single-ended flyback circuit; the energy recovery circuit is controlled by a 555 timer circuit; the 555 timer circuit is connected with the absorption circuits through triodes; and a filter inductor is connected to the voltage Vin input side of the primary side of the transformer. The combined DC-DC converter has the advantages that the utilization rate of solar energy and wind energy by a system is effectively improved, the wide-range and relatively low-voltage direct current output by a storage battery can be converted into stable high-voltage direct current which is provided to an inverting unit.
Description
Technical field
The present invention relates to power-generation inversion technical field, specifically a kind of composite type DC-DC converter.
Background technology
In the whole process of wind light mutual complementing power generation, inverter is as the link exporting electric energy to individual loads or electrical network, the DC conversion of accumulators store must be become alternating current, the conversion efficiency of inverter and stability directly have influence on conversion efficiency and the stability of wind and solar hybrid generating system, and therefore it is one of important component part of wind light mutual complementing power generation.Because storage battery VD far below standard electric alternating current, can not directly will be changed, inverter circuit generally first realizes boosting by DC-DC converter, then adopts the inversion of DC-AC circuit.Prime DC/DC converter not only will have the function of booster tension, also should be able to when storage battery output voltage wide region changes, be supplied to the input voltage that rear class inverter is stable, and proof load also can steady operation when changing suddenly, therefore DC-DC converter is one of key components of inverter.DC-DC converter conventional at present has single-ended forward type, single-ended flyback, push-pull type etc., but considering under the impact that high-power output and wide range input cause whole DC-DC converter, at present when designing DC-DC converter, main exist following three aspect design difficulties:
(1) high-power output
High power electric current in the switching tube that high-power output causes is the difficult problem faced in DC-DC converter design always.This is because high power electric current not only can affect the parts selection of converter, the more important thing is that the high power electric current in switching tube will have a strong impact on the stability of whole converter.For the DC-DC converter of 48V/5kW, supposing that converter is operated in power output is 5kW, and under input voltage 48V condition, can estimate roughly the power current flowing through converter breaker in middle pipe will reach more than 100A, and peak current will higher than 140A.This can impact parts selection and the stability of a system undoubtedly.So, by the structure of appropriate design DC-DC converter, the power current flow through in switching tube must be reduced, thus reach the object improving converter stability, reduce production cost.
(2) wide range input
Wide input voltage causes DC-DC converter operative duty cycles excursion larger, can bring certain difficulty to the design of DC-DC converter, when Design of Transformer, no-load voltage ratio is generally fully loaded with by low pressure to be determined, like this when high input voltage, transformer secondary voltage platform is higher.Meanwhile, due to the existence of transformer leakage inductance and line inductance, flow through reverse recovery current at rectifier diode shutdown moment, higher due to voltage spikes will be produced at rectifier diode two ends.This is not only unfavorable to the trouble free service of rectifier diode, and due to the coupling of transformer, primary current will be caused to increase, bring the extra conduction loss of former limit main switch.
(3) storage battery High Output Current
Storage battery works long hours under comparatively High Output Current condition, and will have a strong impact on service lifetime of accumulator, this can increase useful life and the maintenance cost of system undoubtedly, is unfavorable for the propagation and employment of wind and solar hybrid generating system.So when designing DC-DC converter control circuit, the impact of High Output Current on storage battery must be taken into full account, limit storage battery output current.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the invention provides a kind of efficient combined-type DC-DC converter, the wide region exported by storage battery, relatively low pressure direct current are converted to stable high voltage direct current, for inversion unit provides stable high voltage direct current.
The present invention realizes with following technical scheme: a kind of composite type DC-DC converter, the identical power switch pipe of N road parameter is parallel with in transformer primary side winding side, transformer secondary winding side is connected with rectification circuit after adopting Same Name of Ends and different name end to be connected in series, the two ends of power switch pipe are parallel with absorbing circuit, and absorbing circuit is connected with energy recovering circuit; Described absorbing circuit is made up of electric capacity and Diode series; The two ends of electric capacity are connected to two ends, step-up transformer former limit in single-ended reverse exciting circuit; Described energy recovering circuit adopts 555 timer circuits to control, and 555 timer control circuits are connected with absorbing circuit by triode; Filter inductance is connected to primary voltage of transformer V
ininput side; Described power switch pipe comprises forward side winding N
p1-1, N
p2-1, N
p3-1, N
p4-1with reverse side power switch pipe group V
1-2, V
2-2, V
3-2, V
4-2; Described absorbing circuit comprises electric capacity C1-1, C1-2, C2-1, C2-2, C2-2, C3-1, C3-2, C4-1, C4-2 and diode D1-1, D1-2, D2-1, D2-2, D3-1, D3-2, D4-1, D4-2; Described single-ended reverse exciting circuit comprises triode VT1, VT2, step-up transformer N1, N2, diode VD5, VD6, electric capacity C6, C7; Described rectification circuit comprises rectifier diode VD1, VD2, VD3, VD4 and electric capacity C5; 555 described timer control circuits comprise 555 timers, resistance R1, R2, electric capacity C8, diode VD7, triode Q1; Concrete annexation is as follows:
Storage battery V
batpositive pole be connected with one end of filter inductance Lf1, the other end of filter inductance Lf1 correspondence connects forward side winding N
p1-1, N
p2-1, N
p3-1, N
p4-1same Name of Ends and reverse side power switch pipe group V
1-2, V
2-2, V
3-2, V
4-2d pole, forward side winding N
p1-1different name end connect forward side power switch pipe group V
1-1d pole, forward side winding N
p2-1different name end connect forward side power switch pipe group V
2-1d pole, forward side winding N
p3-1different name end connect forward side power switch pipe group V
3-1d pole, forward side winding N
p4-1different name end connect forward side power switch pipe group V
4-1d pole, reverse side power switch pipe group V
1-2s pole connect reverse side winding N
p1-2same Name of Ends, reverse side power switch pipe group V
2-2s pole connect reverse side winding N
p2-2same Name of Ends, reverse side power switch pipe group V
3-2s pole connect reverse side winding N
p3-2same Name of Ends, reverse side power switch pipe group V
4-2s pole connect reverse side winding N
p4-2same Name of Ends, reverse side winding N
p1-2, N
p2-2, N
p3-2, N
p4-2different name end and forward side power switch pipe group V
1-1, V
2-1, V
3-1, V
4-1s pole connect storage battery V
batnegative pole, at forward side winding N
p1-1different name end and reverse side power switch pipe group V
1-2s pole between be in series with electric capacity C1, at forward side winding N
p2-1different name end and reverse side power switch pipe group V
2-2s pole between be in series with electric capacity C2, at forward side winding N
p3-1different name end and reverse side power switch pipe group V
3-2s pole between be in series with electric capacity C3, at forward side winding N
p4-1different name end and reverse side power switch pipe group V
4-2s pole between be in series with electric capacity C4, the negative pole of electric capacity C1-1 and forward side power switch pipe group V
1-1d pole connect, the negative pole of electric capacity C1-1 is connected with the negative pole of diode D1-1, the positive pole of diode D1-1 and forward side power switch pipe group V
1-1s pole connect, the negative pole of electric capacity C1-2 and forward side power switch pipe group V
1-2d pole connect, the negative pole of electric capacity C1-2 is connected with the negative pole of diode D1-2, the positive pole of diode D1-2 and forward side power switch pipe group V
1-2s pole connect, the negative pole of electric capacity C2-1 and forward side power switch pipe group V
2-1d pole connect, the negative pole of electric capacity C2-1 is connected with the negative pole of diode D2-1, the positive pole of diode D2-1 and forward side power switch pipe group V
2-1s pole connect, the negative pole of electric capacity C2-2 and forward side power switch pipe group V
1-1d pole connect, the negative pole of electric capacity C2-2 is connected with the negative pole of diode D2-2, the positive pole of diode D2-2 and forward side power switch pipe group V
2-2s pole connect, the negative pole of electric capacity C3-1 and forward side power switch pipe group V
3-1d pole connect, the negative pole of electric capacity C3-1 is connected with the negative pole of diode D3-1, the positive pole of diode D3-1 and forward side power switch pipe group V
3-1s pole connect, the negative pole of electric capacity C1-1 and forward side power switch pipe group V
3-2d pole connect, the negative pole of electric capacity C3-2 is connected with the negative pole of diode D3-2, the positive pole of diode D3-2 and forward side power switch pipe group V
3-2s pole connect, the negative pole of electric capacity C4-1 and forward side power switch pipe group V
4-1d pole connect, the negative pole of electric capacity C4-1 is connected with the negative pole of diode D4-1, the positive pole of diode D4-1 and forward side power switch pipe group V
4-1s pole connect, the negative pole of electric capacity C4-2 and forward side power switch pipe group V
4-2d pole connect, the negative pole of electric capacity C4-2 is connected with the negative pole of diode D4-2, the positive pole of diode D4-2 and forward side power switch pipe group V
4-2s pole connect, forward side power switch pipe group V
1-1, V
2-1, V
3-1, V
4-1with reverse side power switch pipe group V
1-2, V
2-2, V
3-2, V
4-2g pole connect external drive circuit, transformer secondary winding N
s1same Name of Ends be connected with the positive pole of rectifier diode VD1, transformer secondary winding N
s1different name end and transformer secondary winding N
s2same Name of Ends be connected, transformer secondary winding N
s2different name end and transformer secondary winding N
s3same Name of Ends be connected, transformer secondary winding N
s3different name end and transformer secondary winding N
s4same Name of Ends be connected, transformer secondary winding N
s4different name end be connected with the positive pole of rectifier diode VD3, the negative pole of rectifier diode VD1 is connected with the negative pole of rectifier diode VD3, the positive pole of rectifier diode VD2 is connected with the positive pole of rectifier diode VD4, the positive pole of rectifier diode VD1 is connected with the negative pole of rectifier diode VD2, the positive pole of rectifier diode VD3 is connected with the negative pole of rectifier diode VD4, the positive pole of electric capacity C5 is connected with the negative pole of rectifier diode VD1, the negative pole of electric capacity C5 is connected with the positive pole of rectifier diode VD2, the E pole of triode VT1 and electric capacity C1-1, C2-1, C3-1, the negative pole of C4-1 is connected, the C pole of triode VT1 is connected with the different name end of step-up transformer N1, the B pole of triode VT1 is connected with the output of inverter, the Same Name of Ends of step-up transformer N1 is connected with the positive pole of absorbing circuit C1-1, C2-1, C3-1, C4-1, and the negative pole of diode VD6 connects the positive pole of C5, and the positive pole of electric capacity C7 connects the negative pole of diode VD6, the minus earth of C7, the E pole of VT2 is connected with the negative pole of electric capacity C1-2, C2-2, C3-2, C4-2, and the C pole of triode VT2 is connected with the different name end of step-up transformer N2, and the B pole of triode VT2 is connected with the output of inverter, the Same Name of Ends of step-up transformer N2 is connected with the positive pole of absorbing circuit C1-2, C2-2, C3-2, C4-2, and the negative pole of diode VD5 connects the positive pole of electric capacity C5, and the positive pole of electric capacity C6 connects the negative pole of diode VD5, the minus earth of electric capacity C6, the output of inverter connects the B pole of triode VT1 and VT2, the input of inverter connects 3 pin of 555 timers, 4 pin and 8 pin of 555 timers meet VCC, 1 pin ground connection of 555 timers, 6 pin of 555 timers are connected with 2 pin and are extremely connected with the E of triode Q1, 5 pin of 555 timers are connected with one end of electric capacity C8, the other end ground connection of electric capacity C8, the C pole of triode Q1 connects 4 pin and 8 pin of 555 timers, one end of B pole difference connecting resistance R1 and R2 of triode Q1, the other end ground connection of resistance R2, the positive pole of another termination voltage-stabiliser tube VD7 of resistance R1, the negative pole of voltage-stabiliser tube VD7 meets input voltage V0.
The invention has the beneficial effects as follows: effectively improve the utilance of system to solar energy and wind energy; The wide region that storage battery can be exported, relatively low pressure direct current are converted to stable high voltage direct current, for inversion unit provides stable high voltage direct current; Effectively can reduce the cost of wind and solar hybrid generating system, new job requirement can be adapted to.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is circuit diagram of the present invention.
Embodiment
As shown in Figure 1, physical circuit annexation of the present invention is as follows: storage battery V
batpositive pole be connected with one end of filter inductance Lf1, the other end of filter inductance Lf1 correspondence connects forward side winding N
p1-1, N
p2-1, N
p3-1, N
p4-1same Name of Ends and reverse side power switch pipe group V
1-2, V
2-2, V
3-2, V
4-2d pole, forward side winding N
p1-1different name end connect forward side power switch pipe group V
1-1d pole, forward side winding N
p2-1different name end connect forward side power switch pipe group V
2-1d pole, forward side winding N
p3-1different name end connect forward side power switch pipe group V
3-1d pole, forward side winding N
p4-1different name end connect forward side power switch pipe group V
4-1d pole, reverse side power switch pipe group V
1-2s pole connect reverse side winding N
p1-2same Name of Ends, reverse side power switch pipe group V
2-2s pole connect reverse side winding N
p2-2same Name of Ends, reverse side power switch pipe group V
3-2s pole connect reverse side winding N
p3-2same Name of Ends, reverse side power switch pipe group V
4-2s pole connect reverse side winding N
p4-2same Name of Ends, reverse side winding N
p1-2, N
p2-2, N
p3-2, N
p4-2different name end and forward side power switch pipe group V
1-1, V
2-1, V
3-1, V
4-1s pole connect storage battery V
batnegative pole, at forward side winding N
p1-1different name end and reverse side power switch pipe group V
1-2s pole between be in series with electric capacity C1, at forward side winding N
p2-1different name end and reverse side power switch pipe group V
2-2s pole between be in series with electric capacity C2, at forward side winding N
p3-1different name end and reverse side power switch pipe group V
3-2s pole between be in series with electric capacity C3, at forward side winding N
p4-1different name end and reverse side power switch pipe group V
4-2s pole between be in series with electric capacity C4, the negative pole of electric capacity C1-1 and forward side power switch pipe group V
1-1d pole connect, the negative pole of electric capacity C1-1 is connected with the negative pole of diode D1-1, the positive pole of diode D1-1 and forward side power switch pipe group V
1-1s pole connect, the negative pole of electric capacity C1-2 and forward side power switch pipe group V
1-2d pole connect, the negative pole of electric capacity C1-2 is connected with the negative pole of diode D1-2, the positive pole of diode D1-2 and forward side power switch pipe group V
1-2s pole connect, the negative pole of electric capacity C2-1 and forward side power switch pipe group V
2-1d pole connect, the negative pole of electric capacity C2-1 is connected with the negative pole of diode D2-1, the positive pole of diode D2-1 and forward side power switch pipe group V
2-1s pole connect, the negative pole of electric capacity C2-2 and forward side power switch pipe group V
1-1d pole connect, the negative pole of electric capacity C2-2 is connected with the negative pole of diode D2-2, the positive pole of diode D2-2 and forward side power switch pipe group V
2-2s pole connect, the negative pole of electric capacity C3-1 and forward side power switch pipe group V
3-1d pole connect, the negative pole of electric capacity C3-1 is connected with the negative pole of diode D3-1, the positive pole of diode D3-1 and forward side power switch pipe group V
3-1s pole connect, the negative pole of electric capacity C1-1 and forward side power switch pipe group V
3-2d pole connect, the negative pole of electric capacity C3-2 is connected with the negative pole of diode D3-2, the positive pole of diode D3-2 and forward side power switch pipe group V
3-2s pole connect, the negative pole of electric capacity C4-1 and forward side power switch pipe group V
4-1d pole connect, the negative pole of electric capacity C4-1 is connected with the negative pole of diode D4-1, the positive pole of diode D4-1 and forward side power switch pipe group V
4-1s pole connect, the negative pole of electric capacity C4-2 and forward side power switch pipe group V
4-2d pole connect, the negative pole of electric capacity C4-2 is connected with the negative pole of diode D4-2, the positive pole of diode D4-2 and forward side power switch pipe group V
4-2s pole connect, forward side power switch pipe group V
1-1, V
2-1, V
3-1, V
4-1with reverse side power switch pipe group V
1-2, V
2-2, V
3-2, V
4-2g pole connect external drive circuit, transformer secondary winding N
s1same Name of Ends be connected with the positive pole of rectifier diode VD1, transformer secondary winding N
s1different name end and transformer secondary winding N
s2same Name of Ends be connected, transformer secondary winding N
s2different name end and transformer secondary winding N
s3same Name of Ends be connected, transformer secondary winding N
s3different name end and transformer secondary winding N
s4same Name of Ends be connected, transformer secondary winding N
s4different name end be connected with the positive pole of rectifier diode VD3, the negative pole of rectifier diode VD1 is connected with the negative pole of rectifier diode VD3, the positive pole of rectifier diode VD2 is connected with the positive pole of rectifier diode VD4, the positive pole of rectifier diode VD1 is connected with the negative pole of rectifier diode VD2, the positive pole of rectifier diode VD3 is connected with the negative pole of rectifier diode VD4, the positive pole of electric capacity C5 is connected with the negative pole of rectifier diode VD1, the negative pole of electric capacity C5 is connected with the positive pole of rectifier diode VD2, the E pole of triode VT1 and electric capacity C1-1, C2-1, C3-1, the negative pole of C4-1 is connected, the C pole of triode VT1 is connected with the different name end of step-up transformer N1, the B pole of triode VT1 is connected with the output of inverter, the Same Name of Ends of step-up transformer N1 is connected with the positive pole of absorbing circuit C1-1, C2-1, C3-1, C4-1, and the negative pole of diode VD6 connects the positive pole of C5, and the positive pole of electric capacity C7 connects the negative pole of diode VD6, the minus earth of C7, the E pole of VT2 is connected with the negative pole of electric capacity C1-2, C2-2, C3-2, C4-2, and the C pole of triode VT2 is connected with the different name end of step-up transformer N2, and the B pole of triode VT2 is connected with the output of inverter, the Same Name of Ends of step-up transformer N2 is connected with the positive pole of absorbing circuit C1-2, C2-2, C3-2, C4-2, and the negative pole of diode VD5 connects the positive pole of electric capacity C5, and the positive pole of electric capacity C6 connects the negative pole of diode VD5, the minus earth of electric capacity C6, the output of inverter connects the B pole of triode VT1 and VT2, the input of inverter connects 3 pin of 555 timers, 4 pin and 8 pin of 555 timers meet VCC, 1 pin ground connection of 555 timers, 6 pin of 555 timers are connected with 2 pin and are extremely connected with the E of triode Q1, 5 pin of 555 timers are connected with one end of electric capacity C8, the other end ground connection of electric capacity C8, the C pole of triode Q1 connects 4 pin and 8 pin of 555 timers, one end of B pole difference connecting resistance R1 and R2 of triode Q1, the other end ground connection of resistance R2, the positive pole of another termination voltage-stabiliser tube VD7 of resistance R1, the negative pole of voltage-stabiliser tube VD7 meets input voltage V0.
operation principle
(1) for the problem that the high power electric current of traditional DC-DC converter breaker in middle pipe is excessive, this patent adopts the design philosophy of " parallel shunt ", namely under the condition not reducing power output, power switch pipe identical for N road parameter is carried out parallel connection at transformer primary avris, realize the mean allocation to power current, the power current that single tube in original half period flows through is assigned in N number of switching tube, greatly reduce the power current value flow through in each switching tube, be about the 1/N adopting conventional push-pull forward converter topological structure, solve adverse effect switch parts selection caused because current value is too high, improve the stability of a system simultaneously.
(2) in transformer secondary High voltage output side, this patent adopts the design philosophy of " principle of stacking ", what adopt " Same Name of Ends one different name end one Same Name of Ends ... different name end " is connected in series mode, the superposition of transformer secondary output voltage is exported, high-voltage alternating voltage required for acquisition, while reduction single transformer power output, effectively can reduce transformer primary secondary turn ratio, reduce the current density of Transformer Winding, reduce design of transformer difficulty, improve transformer job stability simultaneously.
(3) when converter normally works; the leakage inductance of armature winding can be engraved in its two ends and produce transient voltage spike when power switch pipe turns off; in order to protect power tube not breakdown, traditional DC-DC converter generally adopts the absorbing circuits such as RC that energy ezpenditure is fallen.From general absorbing circuit, energy ezpenditure is different on resistance, for first Push-pull Forward Converter, this patent is by C1-1 and D1-1, C1-2 and D1-2 forms absorption circuit, be used for suppressing power tube V1-1, the instantaneous pressure produced when V1-2 turns off, the energy absorbed collects leakage inductance energy at circuit by C1-1, C1-2, utilize energy recovering circuit that the energy that power tube two ends are collected is fed on DC bus after single-ended reverse exciting circuit N1, N2 boosting inverter, thus effectively improve the operating efficiency of DC-DC converter.
(4) difference of this patent and traditional DC-DC converter is filter inductance to move on to primary voltage of transformer V on rear side of rectifier diode
ininput side.Survey because inductance is directly connected on input, thus continuous input current, current ripples is little, is conducive to the efficiency and the working life that improve storage battery; Transformer secondary output is without afterflow inductance in addition, and thus secondary buffering circuit can omit, and circuit structure is simpler, is conducive to reducing costs.
the course of work
1. stage 1 [t
0-t
1]
T
0start, drive singal Driver1 is high level, and Driver2 is low level, thus makes V1-1, and V2-1, V3-1, V4-1 are all in conducting state.Accumulator direct current supply is after output inductor Lf1 filtering, its direct current power electric current is carried out parallel shunt, input four groups of forward side windings simultaneously, now often organize vice-side winding two ends at transformer, all can produce magnitude of voltage is n × Vp1 magnetic induction electromotive force, and wherein n is transformer primary secondary turn ratio.What adopt " Same Name of Ends one different name end one Same Name of Ends ... different name end " due to transformer secondary is connected in series mode, will produce one is superposed the high voltage produced electromotive force V by 4 Transformer Winding magnetic induction electromotive force
st.At rectification outlet side, rectifier diode VD2, VD3 conducting, after C5 filtering, exports high voltage direct current, until t
1moment, drive singal Driver1 reduced to low level, forward side switching tube group V1-1, and V2-1, V3-1, V4-1 turn off, and the stage 1 terminates.
2. stage 2 [t
1-t
2]
At t
1after moment terminates, drive singal Driver1 and Driver2 all reduces to low level, makes V1-1, and V2-1, V3-1, V4-1 recover off state, and now all switching tubes are all in off state.The loop circulation that the primary current of transformer is formed along low-tension supply, positive and negative phase winding and coupling capacitance, at rectification outlet side, rectifier diode VD1, VD4 conducting, after C5 filtering, exports high voltage direct current, until t
2moment, drive singal Driver2 reduced to low level, reverser pipe group V1-2, and V2-2, V3-2, V4-2 conducting, the stage 2 terminates.
3. stage 3 [t
2-t
3]
T
2start, drive singal Driver1 is low level, and Driver2 is high level, thus makes V1-2, and V2-2, V3-2, V4-2 are all in conducting state.Accumulator direct current supply is after output inductor Lf1 filtering, its direct current power electric current is carried out parallel shunt, input four groups of reverse side windings simultaneously, now often organize vice-side winding two ends at transformer, all can produce magnitude of voltage is n × Vp1 magnetic induction electromotive force, and wherein n is transformer primary secondary turn ratio.What adopt " Same Name of Ends one different name end one Same Name of Ends ... different name end " due to transformer secondary is connected in series mode, will produce one is superposed the high voltage produced electromotive force V by 4 Transformer Winding magnetic induction electromotive force
st.At rectification outlet side, rectifier diode VD2, VD3 conducting, after C5 filtering, exports high voltage direct current, until t
1moment, drive singal Driver2 reduced to low level, reverse side switching tube group V1-2, and V2-2, V3-2, V4-2 turn off, and the stage 3 terminates.
4. stage 4 [t
3-t
4]
Stage 4 is substantially identical with stage 2 principle, is not repeated at this.
5. energy recovering circuit control procedure
When the voltage of input Vo is higher than set point, voltage-stabiliser tube VD7 is breakdown, triode Q1 conducting, 2 pin of 555 timers and 6 pin are high level, 555 timer 3 pin output low levels, then export high level by negative circuit, drive VT1 and VT2 conducting, energy recovering circuit is started working; Otherwise Q1 turns off, 555 timer 3 pin export high level, then by negative circuit output low level, drive VT1 and VT2 cut-off, energy recovering circuit quits work.
Claims (1)
1. a composite type DC-DC converter, it is characterized in that: be parallel with the identical power switch pipe of N road parameter in transformer primary side winding side, transformer secondary winding side is connected with rectification circuit after adopting Same Name of Ends and different name end to be connected in series, the two ends of power switch pipe are parallel with absorbing circuit, and absorbing circuit is connected with energy recovering circuit; Described absorbing circuit is made up of electric capacity and Diode series; The two ends of electric capacity are connected to two ends, step-up transformer former limit in single-ended reverse exciting circuit; Described energy recovering circuit adopts 555 timer circuits to control, and 555 timer control circuits are connected with absorbing circuit by triode; Filter inductance is connected to primary voltage of transformer V
ininput side; Described power switch pipe comprises forward side winding N
p1-1, N
p2-1, N
p3-1, N
p4-1with reverse side power switch pipe group V
1-2, V
2-2, V
3-2, V
4-2; Described absorbing circuit comprises electric capacity C1-1, C1-2, C2-1, C2-2, C2-2, C3-1, C3-2, C4-1, C4-2 and diode D1-1, D1-2, D2-1, D2-2, D3-1, D3-2, D4-1, D4-2; Described single-ended reverse exciting circuit comprises triode VT1, VT2, step-up transformer N1, N2, diode VD5, VD6, electric capacity C6, C7; Described rectification circuit comprises rectifier diode VD1, VD2, VD3, VD4 and electric capacity C5; 555 described timer control circuits comprise 555 timers, resistance R1, R2, electric capacity C8, diode VD7, triode Q1; Concrete annexation is as follows:
Storage battery V
batpositive pole be connected with one end of filter inductance Lf1, the other end of filter inductance Lf1 correspondence connects forward side winding N
p1-1, N
p2-1, N
p3-1, N
p4-1same Name of Ends and reverse side power switch pipe group V
1-2, V
2-2, V
3-2, V
4-2d pole, forward side winding N
p1-1different name end connect forward side power switch pipe group V
1-1d pole, forward side winding N
p2-1different name end connect forward side power switch pipe group V
2-1d pole, forward side winding N
p3-1different name end connect forward side power switch pipe group V
3-1d pole, forward side winding N
p4-1different name end connect forward side power switch pipe group V
4-1d pole, reverse side power switch pipe group V
1-2s
pole connects reverse side winding N p1-2 different name end, reverse side power switch pipe group V
2-2s pole connect reverse side winding N
p2-2's
different name end, reverse side power switch pipe group V
3-2s pole connect reverse side winding N
p3-2's
different name end, reverse side power switch pipe group V
4-2s pole connect reverse side winding N
p4-2's
different name end,
reverse side winding N p1-2 , N p2-2 , N p3-2 , N p4-2 's
same Name of Endscorrespondence and forward side power switch pipe group V
1-1, V
2-1, V
3-1, V
4-1s pole connect storage battery V
batnegative pole, at forward side winding N
p1-1different name end and reverse side power switch pipe group V
1-2s pole between be in series with electric capacity C1, at forward side winding N
p2-1different name end and reverse side power switch pipe group V
2-2s pole between be in series with electric capacity C2, at forward side winding N
p3-1different name end and reverse side power switch pipe group V
3-2s pole between be in series with electric capacity C3, at forward side winding N
p4-1different name end and reverse side power switch pipe group V
4-2s pole between be in series with electric capacity C4; The negative pole of electric capacity C1-1 and forward side power switch pipe group V
1-1d pole connect, electric capacity C1-1's
positive polebe connected with the negative pole of diode D1-1, the positive pole of diode D1-1 and forward side power switch pipe group V
1-1s pole connect, the negative pole of electric capacity C1-2 and forward side power switch pipe group V
1-2d pole connect, electric capacity C1-2's
positive polebe connected with the negative pole of diode D1-2, the positive pole of diode D1-2 and forward side power switch pipe group V
1-2s pole connect, the negative pole of electric capacity C2-1 and forward side power switch pipe group V
2-1d pole connect, electric capacity C2-1's
positive polebe connected with the negative pole of diode D2-1, the positive pole of diode D2-1 and forward side power switch pipe group V
2-1s pole connect, the negative pole of electric capacity C2-2 and forward side power switch pipe group V
1-1d pole connect, electric capacity C2-2's
positive polebe connected with the negative pole of diode D2-2, the positive pole of diode D2-2 and forward side power switch pipe group V
2-2s pole connect, the negative pole of electric capacity C3-1 and forward side power switch pipe group V
3-1d pole connect, electric capacity C3-1's
positive polebe connected with the negative pole of diode D3-1, the positive pole of diode D3-1 and forward side power switch pipe group V
3-1s pole connect, electric capacity C3-2's
positive polebe connected with the negative pole of diode D3-2, the positive pole of diode D3-2 and forward side power switch pipe group V
3-2s pole connect, the negative pole of electric capacity C4-1 and forward side power switch pipe group V
4-1d pole connect, electric capacity C4-1's
positive polebe connected with the negative pole of diode D4-1, the positive pole of diode D4-1 and forward side power switch pipe group V
4-1s pole connect, the negative pole of electric capacity C4-2 and forward side power switch pipe group V
4-2d pole connect, electric capacity C4-2's
positive polebe connected with the negative pole of diode D4-2, the positive pole of diode D4-2 and forward side power switch pipe group V
4-2s pole connect; Forward side power switch pipe group V
1-1, V
2-1, V
3-1, V
4-1with reverse side power switch pipe group V
1-2, V
2-2, V
3-2, V
4-2g pole connect external drive circuit;
Transformer secondary winding N
s1same Name of Ends be connected with the positive pole of rectifier diode VD1, transformer secondary winding N
s1different name end and transformer secondary winding N
s2same Name of Ends be connected, transformer secondary winding N
s2different name end and transformer secondary winding N
s3same Name of Ends be connected, transformer secondary winding N
s3different name end and transformer secondary winding N
s4same Name of Ends be connected, transformer secondary winding N
s4different name end be connected with the positive pole of rectifier diode VD3, the negative pole of rectifier diode VD1 is connected with the negative pole of rectifier diode VD3, the positive pole of rectifier diode VD2 is connected with the positive pole of rectifier diode VD4, the positive pole of rectifier diode VD1 is connected with the negative pole of rectifier diode VD2, the positive pole of rectifier diode VD3 is connected with the negative pole of rectifier diode VD4, the positive pole of electric capacity C5 is connected with the negative pole of rectifier diode VD1, the negative pole of electric capacity C5 is connected with the positive pole of rectifier diode VD2, the E pole of triode VT1 and electric capacity C1-1, C2-1, C3-1, the negative pole of C4-1 is connected, the C pole of triode VT1 is connected with the different name end of step-up transformer N1, the B pole of triode VT1 is connected with the output of inverter, the Same Name of Ends of step-up transformer N1 with
electric capacitythe positive pole of C1-1, C2-1, C3-1, C4-1 is connected, and the positive pole of electric capacity C7 connects the negative pole of diode VD6, the minus earth of C7, the E pole of VT2 is connected with the negative pole of electric capacity C1-2, C2-2, C3-2, C4-2, and the C pole of triode VT2 is connected with the different name end of step-up transformer N2, and the B pole of triode VT2 is connected with the output of inverter, the Same Name of Ends of step-up transformer N2 with
electric capacitythe positive pole of C1-2, C2-2, C3-2, C4-2 is connected, and the positive pole of electric capacity C6 connects the negative pole of diode VD5, the minus earth of electric capacity C6, the input of inverter connects 3 pin of 555 timers, 4 pin and 8 pin of 555 timers meet VCC, 1 pin ground connection of 555 timers, 6 pin of 555 timers are connected with 2 pin and are extremely connected with the E of triode Q1,5 pin of 555 timers are connected with one end of electric capacity C8, the other end ground connection of electric capacity C8, the C pole of triode Q1 connects 4 pin and 8 pin of 555 timers, one end of B pole difference connecting resistance R1 and R2 of triode Q1, the other end ground connection of resistance R2, the positive pole of another termination voltage-stabiliser tube VD7 of resistance R1, the negative pole of voltage-stabiliser tube VD7 meets input voltage V0.
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| CN201210321351.3A CN102832821B (en) | 2012-09-03 | 2012-09-03 | Combined DC-DC (direct current-direct current) converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210321351.3A CN102832821B (en) | 2012-09-03 | 2012-09-03 | Combined DC-DC (direct current-direct current) converter |
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| CN102832821B true CN102832821B (en) | 2015-05-13 |
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| US10008941B1 (en) * | 2016-12-22 | 2018-06-26 | Appulse Power Inc. | Auxiliary power supply for switch-mode power supplies |
| CN112170148A (en) * | 2020-08-18 | 2021-01-05 | 华南农业大学 | Ultrasonic power direct current bias pulse excitation power supply |
| CN112968621A (en) * | 2021-02-17 | 2021-06-15 | 青岛大学 | Single-stage composite active clamping push-pull flyback inverter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5914865A (en) * | 1997-10-23 | 1999-06-22 | Hewlett-Packard Company | Simplified AC-DC switching converter with output isolation |
| CN101795063A (en) * | 2010-03-26 | 2010-08-04 | 华东交通大学 | Low loss energy-regenerative type clamping circuit and drive control method |
| CN102361403A (en) * | 2011-06-13 | 2012-02-22 | 珠海泰坦新能源系统有限公司 | Staggered series direct current (DC)/DC converter circuit |
| CN102638164A (en) * | 2012-05-03 | 2012-08-15 | 无锡联动太阳能科技有限公司 | High boost circuit, solar inverter and solar cell system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005060570A2 (en) * | 2003-12-10 | 2005-07-07 | Moises De La Cruz | Ac to dc converter circuit |
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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5914865A (en) * | 1997-10-23 | 1999-06-22 | Hewlett-Packard Company | Simplified AC-DC switching converter with output isolation |
| CN101795063A (en) * | 2010-03-26 | 2010-08-04 | 华东交通大学 | Low loss energy-regenerative type clamping circuit and drive control method |
| CN102361403A (en) * | 2011-06-13 | 2012-02-22 | 珠海泰坦新能源系统有限公司 | Staggered series direct current (DC)/DC converter circuit |
| CN102638164A (en) * | 2012-05-03 | 2012-08-15 | 无锡联动太阳能科技有限公司 | High boost circuit, solar inverter and solar cell system |
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