CN102868301B - Realize the tandem type DC/DC converter of instantaneous voltage current balance type - Google Patents
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Abstract
The present invention relates to a kind of tandem type DC/DC converting means realizing instantaneous voltage current balance type, comprising: partial pressure unit, described partial pressure unit comprises dividing potential drop output; The first converter unit of direct voltage is obtained by an output of described partial pressure unit and described dividing potential drop output; The second converter unit of direct voltage is obtained by another output of described partial pressure unit and described dividing potential drop output; The voltage input end that described first converter unit is electrically connected with described dividing potential drop output is first input end; The voltage input end that described second converter unit is electrically connected with described dividing potential drop output is the second input; Also comprise: the balancing unit connecting described dividing potential drop output and described first input end.Implement the tandem type DC/DC converting means realizing instantaneous voltage current balance type of the present invention, there is following beneficial effect: improve the efficiency of converter, power density and reliability; Avoid adopting complicated control and protection strategy, reduce the Design and manufacture difficulty of converter.
Description
Technical field
The present invention relates to electric energy conversion art, more particularly, relate to a kind of tandem type DC/DC converter realizing instantaneous voltage current balance type.
Background technology
High-power power converting means generally adopts three-phase alternating current to input, three-phase PFC(PFC-powerfactorcorrection) VD of translation circuit is usually at about 760V ~ 820V, even higher, this just requires the switching device using voltage levels in rear class DC/DC converter.But the raising of switching device voltage grade can cause the increase of cost and the decline of conversion efficiency.The method of current head it off is mainly by adopting three-level DC converter or tandem type DC converter, and this two quasi-converter can effectively reduce the voltage stress of switching tube.By adopting derided capacitors, clamping diode and certain control method, three-level DC converter ensures that the voltage stress of its power tube is the half of input direct voltage.Its shortcoming is: power tube work schedule is more complicated, needs to take the control technology of more complicated to realize the tri-level switch of power tube; Must adopt an effective measure and guarantee the equilibrium of derided capacitors voltage and brachium pontis mid-point voltage under stable state and various current intelligence.And tandem type converter adopts capacitance partial pressure to reduce the input voltage of single inverter, the output of each converter obtains required voltage by mode that is in parallel or series connection.Its circuit structure is simple, and in cascade structure, each converter is connected respectively to corresponding derided capacitors, only need adopt the control mode of basic transformation device topology.Its shortcoming is: although the mean value of high voltage bus derided capacitors can be controlled preferably, but inconsistent due to three-phase alternating current input phase, cause derided capacitors instantaneous voltage can not be completely balanced, and the circuit parameter of two converters also certainly exists certain difference, if the output-parallel work of two converters, the difference of input voltage and circuit parameter can cause converter output voltage there are differences, and the former secondary transient current of converter and power can not be divided equally.Therefore, in the prior art, when using tandem type DC converter, for ensureing the reliability of converter, the surplus improving the rated current of inverter power device and the maximum power of magnetic device is needed during design, cause the decline of the increase of product cost, the decline of power density and conversion efficiency, add the difficulty of converter design and manufacture.
Summary of the invention
The technical problem to be solved in the present invention is, there are differences due to transient current and power for the above-mentioned of prior art, cause needing to strengthen design margin, then make the defect of cost increase, power density decline, decrease in efficiency, the tandem type DC/DC converter realizing instantaneous voltage current balance type that a kind of cost is lower, power density is higher, efficiency is higher is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of tandem type DC/DC converting means realizing instantaneous voltage current balance type, comprise: by the partial pressure unit of the input direct voltage dividing potential drop of high-voltage value, described partial pressure unit comprises the dividing potential drop output that its voltage is the half of described input direct voltage; Obtained the alternating voltage after dividing potential drop by an output of described partial pressure unit and described dividing potential drop output and be converted into the first converter unit of the direct voltage output of setting voltage value; The direct voltage after dividing potential drop is obtained and the second converter unit of exporting of the alternating voltage being converted into setting voltage value by another output of described partial pressure unit and described dividing potential drop output; The voltage input end that described first converter unit is electrically connected with described dividing potential drop output is first input end; The voltage input end that described second converter unit is electrically connected with described dividing potential drop output is the second input; Described first input end and the second input are interconnected; Also comprise the balancing unit connecting described dividing potential drop output and described first input end.
Further, described balancing unit comprises the balancing capacitance being serially connected in described dividing potential drop output and described first converter unit, second converter unit voltage input end one end; Described balancing capacitance one end is connected on described dividing potential drop output, and the other end is connected on described first input end.
Further, described first converter unit and the second converter unit are respectively the DC/DC converter with identical topological structure.
Further, the topological structure of described first converter unit and the second converter unit comprises pulse width modulation, phase-shift soft switch or LLC series resonant converter.
Further, also comprise rectification filtering unit, the alternating voltage that described first converter unit and described second converter unit export by described rectification filtering unit is respectively by parallel after independent rectification module rectification, and the alternating voltage parallel connection supplying the load of described converting means or described first converter unit and described second converter unit output after filtering is afterwards by rectification module rectification, filtering supply the load of described converting means.
Further, described rectification module comprises full-wave rectification, halfwave rectifier or circuit of synchronous rectification.
Further, described partial pressure unit comprises the first electric capacity and the second electric capacity, is attempted by voltage input end after described first electric capacity and the second capacitance series; The tie point of described first electric capacity and the second electric capacity is described dividing potential drop output.
Further, the voltage input end of described first converter unit is electrically connected on described first electric capacity two ends; One end that its one end is not connected with described second electric capacity with described first electric capacity connects, and its other end is connected with described dividing potential drop output by described balancing unit; The voltage input end of described second converter unit is electrically connected on described second electric capacity two ends; One end that its one end is not connected with described first electric capacity with described second electric capacity connects, and its other end is connected with described dividing potential drop output by described balancing unit.
Further, described first converter unit comprises the first bridge switch module, the first resonance modules and first transformer of connecting successively; Described first bridge switch module is attempted by described first electric capacity two ends, and its output is two, and one of them output is connected with another output by the first resonance modules, the first transformer primary side successively; Described first resonance modules is LC series resonant circuit; Described second converter unit comprises the second bridge switch module, the second resonance modules and second transformer of connecting successively; Described second bridge switch module is attempted by described second electric capacity two ends, and its output is two, and one of them output is connected with another output by the second resonance modules, the second transformer primary side successively; Described second resonance modules is LC series resonant circuit.
Further, described first bridge switch module comprises bridge architecture, comprises the first switch, second switch, the 3rd switch and the 4th switch; Be attempted by described first electric capacity by described balancing unit after described first switch and the 4th switch serial connection; Be attempted by described first electric capacity by described balancing unit after described second switch and the 3rd switch serial connection; The tie point of the tie point of described first switch and the 4th switch and described second switch and the 3rd switch is two outputs of described first bridge switch module; Described second bridge switch module comprises bridge architecture, comprises the 5th switch, the 6th switch, the 7th switch and the 8th switch; Be attempted by described second electric capacity by described balancing unit after described 5th switch and the 8th switch serial connection; Be attempted by described second electric capacity by described balancing unit after described 6th switch and the 7th switch serial connection; The tie point of described 5th switch and the 8th switch and the tie point of described 6th switch and the seven or three switch are two outputs of described second bridge switch module.
Implement the tandem type DC/DC converting means realizing instantaneous voltage current balance type of the present invention, there is following beneficial effect: owing to increasing balancing unit on the tie point of the derided capacitors of partial pressure unit, make converter while every advantage with general cascade DC/DC converter, the instantaneous output achieving two cascade DC converter can effectively independently be divided equally.Reduce the redundancy in design, reduce costs, improve the efficiency of converter, power density and reliability; Avoid adopting complicated control and protection strategy, reduce the Design and manufacture difficulty of converter.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention realizes the tandem type DC/DC converting means embodiment of instantaneous voltage current balance type;
Fig. 2 is in described embodiment and connects the electrical schematic diagram of the tandem type DC/DC converting means of rear rectification;
Fig. 3 is that the one of Fig. 2 improves electrical schematic diagram;
Fig. 4 is in described embodiment after rectification and the electrical schematic diagram of the tandem type DC/DC converting means connect;
Fig. 5 is that the one of Fig. 4 improves electrical schematic diagram;
Fig. 6 is that the one of Fig. 4 improves electrical schematic diagram;
Fig. 7 is that the one of Fig. 4 improves electrical schematic diagram;
Fig. 8 is that the one of Fig. 4 improves electrical schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated.
As shown in Figure 1, realize in the tandem type DC/DC converting means embodiment of instantaneous voltage current balance type in the present invention, this tandem type DC/DC converting means comprises partial pressure unit 11, first converter unit 12, second converter unit 13, rectification filtering unit 14 and balancing unit 15; Wherein, partial pressure unit 11 is by input direct voltage (being exported the direct voltage obtained by the three-phase PFC) dividing potential drop of high-voltage value, this partial pressure unit 11 comprises the dividing potential drop output that two voltage output ends (i.e. the input of input direct voltage) and its voltage are the half of described input direct voltage, like this, by the average voltage that any one in above-mentioned two voltage input ends and dividing potential drop output obtain be just in time the half of input direct voltage; First converter unit 12 obtains the direct voltage after dividing potential drop (this average voltage is the half of input direct voltage value) by a voltage output end of partial pressure unit 11 and dividing potential drop output and the alternating voltage being converted into setting voltage value exports; Second converter unit 13 obtains the direct voltage after dividing potential drop (this average voltage is the half of input direct voltage value equally) by another voltage output end of partial pressure unit 11 and above-mentioned dividing potential drop output and the alternating voltage being converted into setting voltage value exports; In the present embodiment, the voltage input end that the first converter unit 12 is electrically connected with dividing potential drop output is first input end; The voltage input end that second converter unit 13 is electrically connected with dividing potential drop output is the second input; Refer to Fig. 1, in the present embodiment, together with first input end is connected directly between with the second input; Meanwhile, dividing potential drop output is connected on above-mentioned first input end and the second input by balancing unit 15; The alternating voltage that first converter unit 12 and the second converter unit 13 export by rectification filtering unit 14 respectively by parallel after independent rectification module rectification, and then supplies the load of this converting means after filtering; Under certain situation in the present embodiment, the alternating voltage parallel connection that also the first converter unit 12 and the second converter unit 13 can be exported is afterwards by rectification module rectification, filtering supply the load of converting means.
In the present embodiment, the first converter unit 12 and the second converter unit 13 are respectively the DC/DC converter with identical topological structure; The topological structure of the first converter unit 12 and the second converter unit 13 comprises pulse width modulation, phase-shift soft switch or LLC series resonant converter, in Fig. 2-Fig. 8, for LLC series resonant converter, the present embodiment is illustrated, but the first converter unit 12 in other cases, in the present embodiment and the second converter unit 13 also can use the topological structure of pulse width modulation, phase-shift soft switch; In addition, in the present embodiment, the rectification module also full-wave rectification in rectification filtering unit 14, halfwave rectifier or circuit of synchronous rectification.
In the present embodiment, refer to Fig. 2, above-mentioned balancing unit 15 is serially connected in the balancing capacitance between above-mentioned dividing potential drop output and first input end, the second input, see the electric capacity C3 in Fig. 2; This balancing capacitance (i.e. electric capacity C3) one end is connected on dividing potential drop output, the other end connects on a first input (because first input end and the second input are directly connected, therefore, the other end of above-mentioned balancing capacitance is also be connected on the second input).
In the present embodiment, partial pressure unit 11 comprises the first electric capacity and the second electric capacity, electric capacity C1 namely in Fig. 2 and electric capacity C2, is attempted by the voltage input end (DC voltage input end namely obtained by three-phase alternating current electric rectification) of whole converting means after the first electric capacity and the second electric capacity (electric capacity C1 and electric capacity C2) are connected in series; And namely the tie point of the first electric capacity and the second electric capacity is dividing potential drop output.The voltage input end of the first converter unit 12 is electrically connected on above-mentioned first electric capacity (i.e. electric capacity C1 in Fig. 2) two ends, see Fig. 2, specifically, one end that its one end and the first electric capacity are not connected with the second electric capacity connects, and its other end is by electric capacity C3 in balancing unit 15(and Fig. 2) be connected with above-mentioned dividing potential drop output; The voltage input end of the second converter unit 13 is electrically connected on above-mentioned second electric capacity (i.e. electric capacity C2 in Fig. 2) two ends; One end that its one end and the second electric capacity are not connected with the first electric capacity connects, and its other end is by electric capacity C3 in balancing unit 15(and Fig. 2) be connected with dividing potential drop output.
Refer to Fig. 2, in the present embodiment, the first converter unit 12 comprises the first bridge switch module (S1-S4, D1-D4 namely in Fig. 2), the first resonance modules (L1 and C4 namely in Fig. 2) and first transformer (T1 namely in Fig. 2) of connecting successively; The input of the first bridge switch module is attempted by the first electric capacity two ends, and the output of the first bridge switch module is two, and one of them output is connected with another output by the first resonance modules, the first transformer primary side; First resonance modules is LC series resonant circuit; Second converter unit 13 comprises the second bridge switch module (S5-S8, D5-D8 namely in Fig. 2), the second resonance modules (L2 and C5 namely in Fig. 2) and second transformer (T2 namely in Fig. 2) of connecting successively; The input of the second bridge switch module is attempted by the second electric capacity two ends, and the output of the second bridge switch module is two, and one of them output is connected with another output by the second resonance modules, the second transformer primary side; Second resonance modules is LC series resonant circuit.
More specifically, in fig. 2, the first bridge switch module is bridge architecture, comprises the first switch S 1, second switch S2, the 3rd switch S 3 and the 4th switch S 4; Be attempted by the two ends of the first electric capacity (electric capacity C1) by balancing unit 15 after first switch S 1 and the 4th switch S 4 serial connection; Be attempted by the first electric capacity two ends by balancing unit 15 after second switch S2 and the 3rd switch S 3 serial connection; That is, two switch combinations after above-mentioned serial connection are actually and connect together; The tie point of the tie point of the first switch S 1 and the 4th switch S 2 and second switch S2 and the 3rd switch S 4 is two outputs of the first bridge switch module; Similarly, the second bridge switch module is also bridge architecture, comprises the 5th switch S 5, the 6th switch S 6, the 7th switch S 7 and the 8th switch S 8; Be attempted by the second electric capacity by balancing unit 15 after 5th switch S 5 and the 8th switch S 8 serial connection; Be attempted by the second electric capacity by balancing unit 15 after 6th switch S 6 and the 7th switch S 7 serial connection; That is, two switch combinations after above-mentioned serial connection are actually and connect together; The tie point of the 5th switch S 5 and the 8th switch S 8 and the tie point of the 6th switch S 6 and the 7th switch S 7 are two outputs of the second bridge switch module.
In a word, in fig. 2, electric capacity C1 and electric capacity C2 high input voltage derided capacitors in series, one end of balancing capacitance C3 is connected with the tie point of electric capacity C2 with electric capacity C1, and the other end is connected with the tie point of two controlled resonant converters (i.e. the first converter unit and the second converter unit).First converter unit 12 is LLC resonant converter: four switching tubes form bridge architecture, S1 and S4 is connected into a brachium pontis, S2 and S3 is connected into another brachium pontis, two groups of brachium pontis are connected in parallel, and D1, D2, D3, D4 are respectively corresponding switching tube parasitic body diode or external fast recovery diode; Resonant inductance L1, resonant capacitance C4, the first transformer T1 former limit winding are sequentially connected in series rear access bridge architecture two brachium pontis mid point; First converter unit 12(LLC controlled resonant converter) positive input terminal be directly connected to the positive pole of derided capacitors C1, the negative input end of the first converter unit 12 is similarly LLC resonant converter with the second converter unit 13() positive input terminal and one end of balancing capacitance C3 be connected.Second converter unit 13 is LLC resonant transform circuit structure: four switching tubes form bridge architecture, S5 and S8 is connected into a brachium pontis, S6 and S7 is connected into another brachium pontis, two groups of brachium pontis are connected in parallel, and D5, D6, D7, D8 are respectively corresponding switching tube parasitic body diode or external fast recovery diode; Resonant inductance L2, resonant capacitance C5, the second transformer T2 former limit winding are sequentially connected in series rear access bridge architecture two brachium pontis mid point; The positive input terminal of the LLC resonant converter of the second converter unit 13 is connected with the negative input end of LLC resonant converter of the first converter unit 12 and one end of balancing capacitance C3; Second converter unit 13(LLC controlled resonant converter) negative input end be directly connected to the negative pole of derided capacitors C2.In the present embodiment, when above-mentioned first converter unit 12 and the second converter unit 13 are other type DC/DC converter, its connected mode is identical with above-mentioned connected mode.First transformer T1 of the first converter unit 12 is in parallel with the second transformer T2 vice-side winding separately of the second converter unit 13 accesses the bridge rectifier filter circuit be made up of D9, D10, D11, D12, C6 afterwards.
In tradition tandem type circuit, bus derided capacitors C1 is directly connected with the intermediate connection point of two DC/DC converters (i.e. the first converter unit 12 and the second converter unit 13) with the tie point of electric capacity C2, derided capacitors C1 and electric capacity C2 divides equally high voltage bus voltage, and respectively as the input of two groups of LLC resonant converter, therefore the tie point current potential of two groups of LLC resonant converter is relatively stable.By certain control, although electric capacity C1 and electric capacity C2 average voltage can obtain good counterbalance effect, but its instantaneous value certainly exists different, and two-way LLC resonant circuit (in the present embodiment, i.e. the first converter unit 12 and the second converter unit 13) actual parameter also certainly exists certain difference, cause the instantaneous value of transformer secondary voltage, former limit resonance current and output current there are differences, two-way LLC resonant converter instantaneous power can not balance.If can not take effective control strategy or the strict parameter error controlling each Primary Component of main circuit, under converter maximum power output or some current intelligences, the imbalance of transient current and power can reach considerable ratio.For ensureing the reliability of converter, must leave enough surpluses when designing, the redundancy of design can apparently higher than the design of single inverter.
In the present embodiment, refer to Fig. 2, when after increase balancing capacitance C3, suppose that the voltage on certain moment electric capacity C3 is U
c3(reference direction is that the right side is just being born in a left side), then the input voltage of the first converter unit 12 is U
c1-U
c3, and the input voltage of the second converter unit 13 is U
c2+ U
c3if the transient current of the first converter unit 12 is greater than the transient current of the second converter unit 13, i.e. the current differential I of the first converter unit 12 and the second converter unit 13
3-4>0, then on balancing capacitance C3 by generation figure in direction electric current from right to left, make U
c3increase, therefore U
c1-U
c3reduce, and U
c2+ U
c3increase, namely the input voltage of the first converter unit 12 will reduce, and the input voltage of the second converter unit 13 will increase, thus the resonance current of the first converter unit 12 is reduced, and the resonance current of the second converter unit 13 increases, I
3-4to reduce, form the negative-feedback regu-lation to instantaneous unsymmetrical current.Due to adding of balancing capacitance C3, the tie point current potential opposing busbars derided capacitors tie point current potential of two converters is fluctuated within the specific limits, the input voltage of each converter unit of automatic adjustment carrys out the difference of balance bus derided capacitors voltage and circuit parameter, thus realizes that two groups of LLC resonant converter input-output powers are instantaneous independently to be divided equally.
In the present embodiment, Fig. 3 is that the one of circuit in Fig. 2 is improved, and in figure 3, in its rectification filtering unit, comparatively Fig. 2 many series connection inductance during filtering, can obtain better filter effect.
In addition, in the present embodiment, the alternating voltage that also above-mentioned first converter unit 12 and the second converter unit 13 can be exported respectively by respective rectification module rectification after again and carry out filtering together with receiving and to export or respectively by respective rectification module rectification, and respectively after filtering again and receive and export together.Meanwhile, the circuit of above-mentioned rectification module and filtering part also can make various distortion, and concrete condition refers to Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8; In the diagram, basic condition is similar to Fig. 2, and difference to be after alternating voltage that the first converter unit 12 and the second converter unit 13 export is respectively by respective rectification module rectification and to carry out filtering together with receiving and export; Fig. 5 and Fig. 4 is similar, before rectification, only adds an inductance or utilize transformer pair side leakage inductance to suppress load the current break caused; After inductance in Fig. 5 is moved to rectification by Fig. 6; In Fig. 6 two inductance is merged into one by Fig. 7; Fig. 8 is the filtering of π type.In a word, Fig. 5-Fig. 8 is the improvement of Fig. 4, and Fig. 4 is different from Fig. 2 situation in the present embodiment, the alternating voltage exported by the first converter unit 12 and the second converter unit 13 by parallel connection after independent rectification module rectification, and then supplies the load of this converting means after filtering.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (5)
1. realize a tandem type DC/DC converting means for instantaneous voltage current balance type, comprising: by the partial pressure unit of the input direct voltage dividing potential drop of high-voltage value, described partial pressure unit comprises the dividing potential drop output that its voltage is the half of described input direct voltage; The direct voltage after dividing potential drop is obtained and the first converter unit of exporting of the alternating voltage being converted into setting voltage value by an output of described partial pressure unit and described dividing potential drop output; The direct voltage after dividing potential drop is obtained and the second converter unit of exporting of the alternating voltage being converted into setting voltage value by another output of described partial pressure unit and described dividing potential drop output; The voltage input end that described first converter unit is electrically connected with described dividing potential drop output is first input end; The voltage input end that described second converter unit is electrically connected with described dividing potential drop output is the second input; Described first input end and the second input are interconnected; It is characterized in that, described first converter unit and the second converter unit are respectively the DC/DC converter with identical topological structure, and described first input end and the second input are the intermediate connection point of described first converter unit and the second converter unit; Also comprise the balancing unit be serially connected on described dividing potential drop output and described tie point;
Wherein, described balancing unit comprises the balancing capacitance be serially connected on described dividing potential drop output and described first input end and described second input;
Described partial pressure unit comprises the first electric capacity and the second electric capacity, is attempted by voltage input end after described first electric capacity and the second capacitance series; The tie point of described first electric capacity and the second electric capacity is described dividing potential drop output, and the magnitude of voltage on it is the half of voltage input end voltage;
The topological structure of described first converter unit and the second converter unit comprises pulse width modulation, phase-shift soft switch or LLC series resonant converter;
Described first converter unit comprises the first bridge switch module, the first resonance modules and first transformer of connecting successively; Described first bridge switch module is attempted by described first electric capacity two ends, and its output is two, and one of them output is connected with another output by the first resonance modules, the first transformer primary side successively; Described first resonance modules is LC series resonant circuit; Described second converter unit comprises the second bridge switch module, the second resonance modules and second transformer of connecting successively; Described second bridge switch module is attempted by described second electric capacity two ends, and its output is two, and one of them output is connected with another output by the second resonance modules, the second transformer primary side successively; Described second resonance modules is LC series resonant circuit.
2. the tandem type DC/DC converting means realizing instantaneous voltage current balance type according to claim 1, it is characterized in that, also comprise rectification filtering unit, the alternating voltage that described first converter unit and described second converter unit export by described rectification filtering unit is respectively by parallel after independent rectification module rectification, and the alternating voltage parallel connection supplying the load of described converting means or described first converter unit and described second converter unit output after filtering is afterwards by rectification module rectification, filtering supply the load of described converting means.
3. the tandem type DC/DC converting means realizing instantaneous voltage current balance type according to claim 2, it is characterized in that, described rectification module comprises full-wave rectification, halfwave rectifier or circuit of synchronous rectification.
4. the tandem type DC/DC converting means realizing instantaneous voltage current balance type according to claim 3, is characterized in that, the voltage input end of described first converter unit is electrically connected on described first electric capacity two ends; One end that its one end is not connected with described second electric capacity with described first electric capacity connects, and its other end is connected with described dividing potential drop output by described balancing unit; The voltage input end of described second converter unit is electrically connected on described second electric capacity two ends; One end that its one end is not connected with described first electric capacity with described second electric capacity connects, and its other end is connected with described dividing potential drop output by described balancing unit.
5. the tandem type DC/DC converting means realizing instantaneous voltage current balance type according to claim 4, is characterized in that, described first bridge switch module comprises bridge architecture, comprises the first switch, second switch, the 3rd switch and the 4th switch; Be attempted by described first electric capacity by described balancing unit after described first switch and the 4th switch serial connection; Be attempted by described first electric capacity by described balancing unit after described second switch and the 3rd switch serial connection; The tie point of the tie point of described first switch and the 4th switch and described second switch and the 3rd switch is two outputs of described first bridge switch module; Described second bridge switch module comprises bridge architecture, comprises the 5th switch, the 6th switch, the 7th switch and the 8th switch; Be attempted by described second electric capacity by described balancing unit after described 5th switch and the 8th switch serial connection; Be attempted by described second electric capacity by described balancing unit after described 6th switch and the 7th switch serial connection; The tie point of described 5th switch and the 8th switch and the tie point of described 6th switch and the 7th switch are two outputs of described second bridge switch module.
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| CN103346674A (en) * | 2013-06-14 | 2013-10-09 | 阳光电源股份有限公司 | Insulated converter |
| CN104767409A (en) * | 2015-03-13 | 2015-07-08 | 杜心林 | Direct voltage splitting circuit supporting multi-level technology |
| CN109478849B (en) * | 2016-07-26 | 2021-10-29 | 三菱电机株式会社 | Resonant power conversion device |
| CN107276393B (en) * | 2017-07-25 | 2023-10-20 | 广州金升阳科技有限公司 | High-voltage power supply circuit |
| CN110535349A (en) * | 2019-09-03 | 2019-12-03 | 南京工程学院 | A kind of tandem type resonant type soft-switch high-voltage DC-DC conversion device based on phase shifting control |
| CN117157867A (en) * | 2021-05-13 | 2023-12-01 | 华为数字能源技术有限公司 | Resonant switched capacitor converter and power supply system |
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| CN202261015U (en) * | 2011-08-06 | 2012-05-30 | 深圳市核达中远通电源技术有限公司 | Power supply converter topology capable of realizing voltage equalization and power capacitance expansion |
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