CN203368327U - Cascade bidirectional DC-DC converter - Google Patents
Cascade bidirectional DC-DC converter Download PDFInfo
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- CN203368327U CN203368327U CN 201320460001 CN201320460001U CN203368327U CN 203368327 U CN203368327 U CN 203368327U CN 201320460001 CN201320460001 CN 201320460001 CN 201320460001 U CN201320460001 U CN 201320460001U CN 203368327 U CN203368327 U CN 203368327U
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Abstract
The application provides a cascade bidirectional DC-DC converter which comprises a first-stage bidirectional DC-DC circuit, an energy storage filtering unit and a second-stage bidirectional DC-DC circuit. The first-stage bidirectional DC-DC circuit comprises two same bidirectional three-level modules which are connected in parallel. In the first stage, the two same bidirectional three-level modules connected in parallel are adopted; and in the second stage, a bidirectional three-level module is adopted. Buck-boost can be realized through both of the above stages. By multiplying buck-boost ratios of the two stages, the total buck-boost ratio of the cascade circuit can reach more than 10 times. Thus, the disadvantage of low buck-boost ratio of a traditional non-isolated bidirectional DC-DC converter is solved, and high buck-boost ratio can be realized without an isolation transformer. In addition, as the two same bidirectional three-level modules connected in parallel are adopted in the first stage, each route only bear half of input current, thus being beneficial to reduction of input current stress of a switch tube as well as model selection of the switch tube.
Description
Technical field
The application relates to a kind of DC-DC converter, particularly a kind of cascade bidirectional DC-DC converter.
Background technology
The cascade bidirectional DC-DC converter is widely used at present in light storage system, fuel cell system, electric automobile and uninterruptible power system.
Referring to Fig. 1, this figure is a kind of typical non-isolation cascade bidirectional DC-DC converter schematic diagram of the prior art.
The first switching tube Q1 in Fig. 1 and second switch pipe Q2 can adopt respectively metal-oxide-semiconductor or IGBT pipe.
But topological buck can only be accomplished 4 times of left and right than maximum, can't meet the requirement of promotion step-down ratio.
For traditional non-isolated cascade bidirectional DC-DC converter, also provide a kind of isolated cascade bidirectional DC-DC converter (BDC, Bi-directional DC-DC Converter) in prior art.
Referring to Fig. 2, this figure is the isolated cascade bidirectional DC-DC converter schematic diagram provided in prior art.
As shown in Figure 2, the first order is for not isolating BDC100, and the second level is commutator transformer (DCT, Direct Current Transformer) 200;
The cascade bidirectional DC-DC converter of this structure of Fig. 2 mainly utilizes second level DCT200 to realize high step-up ratio.
But the shortcoming of this structure is also will increase isolating transformer.
In sum, how providing a kind of cascade bidirectional DC-DC converter not utilize isolating transformer and can realize high buck ratio, is those skilled in the art's technical issues that need to address.
Summary of the invention
The technical problem that the application will solve is to provide a kind of cascade bidirectional DC-DC converter, does not utilize isolating transformer and can realize high buck ratio.
A kind of cascade bidirectional DC-DC converter that the application provides, comprise the first order bi-directional DC-DC circuit, energy storage filter unit, the second level bi-directional DC-DC circuit that connect successively, first order bi-directional DC-DC circuit comprises two bidirectional three-level modules identical, that be connected in parallel, is respectively the first bidirectional three-level module and the second bidirectional three-level module;
Second level bi-directional DC-DC circuit comprises the 3rd bidirectional three-level module.
Further, described energy storage filter unit comprises the first that be connected in series, identical filter capacitor and the second filter capacitor.
Further, described the first bidirectional three-level module comprises: the first inductance, the first switching tube, the 3rd switching tube, the second inductance, second switch pipe and the 4th switching tube; One end of described the first inductance connects the anode of input power, and the other end of described the first inductance is connected with the first end of described the first filter capacitor by described the 3rd switching tube; The other end of described the first inductance connects the negative terminal of input power by described the first switching tube, second switch pipe, the second inductance; The tie point of the first switching tube and second switch pipe is connected with the first end of the second filter capacitor with the second end of the first filter capacitor, and the second end of the second filter capacitor is connected with the tie point of second switch pipe with the second inductance by the 4th switching tube; Described the second bidirectional three-level module comprises: the 3rd inductance, the 5th switching tube, the 6th switching tube, the 4th inductance, the 7th switching tube and the 8th switching tube; One end of described the 3rd inductance connects the anode of input power, and the other end of described the 3rd inductance is connected with the first end of described the first filter capacitor by described the 7th switching tube; The other end of described the 3rd inductance connects the negative terminal of input power by described the 5th switching tube, the 6th switching tube, the 4th inductance; The tie point of the 5th switching tube and the 6th switching tube is connected with the first end of the second filter capacitor with the second end of the first filter capacitor, and the second end of the second filter capacitor is connected with the tie point of the 6th switching tube with the 4th inductance by the 8th switching tube.
Further, described the 3rd bidirectional three-level module comprises the 5th inductance, the 9th switching tube, the tenth switching tube, the 6th inductance, the 11 switching tube and twelvemo pass pipe, and the 3rd filter capacitor and the 4th filter capacitor, the first end of described the 5th inductance is connected with the first end of described the first filter capacitor, the first end of described the 6th inductance is connected with the second end of described the second filter capacitor, the second end of the 5th inductance is connected with the second end of described the 6th inductance with the tenth switching tube by the 9th switching tube, the second end of the 5th inductance is connected with the positive output end of described cascade bidirectional DC-DC converter by the 11 switching tube, the second end of the 6th inductance closes pipe by twelvemo and is connected with the negative output terminal of described cascade bidirectional DC-DC converter, the tie point of the 9th switching tube and the tenth switching tube is connected with the mid-point voltage output of described cascade bidirectional DC-DC converter, described the 3rd filter capacitor and the 4th filter capacitor are connected in series between the positive output end and negative output terminal of described cascade bidirectional DC-DC converter, and the tie point of the 3rd filter capacitor and the 4th filter capacitor is connected with the mid-point voltage output of described cascade bidirectional DC-DC converter, described the 3rd filter capacitor is identical with the electric parameter of the 4th filter capacitor.
Further, described cascade bidirectional DC-DC converter also comprises the first switch, second switch, the 3rd switch and the 4th switch; Described the first switch is connected between the anode of the first end of described the first inductance and input power; Described second switch is connected between the anode of the first end of described the 3rd inductance and input power; Described the 3rd switch is connected between the anode of the first end of described the first filter capacitor and input power; Described the 4th switch is connected between the negative terminal of the second end of described the second filter capacitor and input power.
Further, described cascade bidirectional DC-DC converter also comprises the 5th switch, the first diode, the first resistance; Described the 5th switch is connected between the positive output end of the anode of described input power and described cascade bidirectional DC-DC converter; Described the first diode and the first resistance are connected in series between the positive output end of described the 5th switch and described cascade bidirectional DC-DC converter; One end of the anodic bonding of described the first diode the 5th switch, the negative electrode of described the first diode connects an end of described the first resistance; Perhaps, an end of described the first resistance of the anodic bonding of described the first diode, the negative electrode of described the first diode connects the positive output end of described cascade bidirectional DC-DC converter.
Further, described the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, the 11 switching tube and twelvemo are closed pipe for one or several the combination in metal-oxide-semiconductor, IGBT pipe or SiC-MOS.
Further, described cascade bidirectional DC-DC converter also comprises input filter capacitor; Described input filter capacitor is connected in parallel on the two ends of described input power.
It should be noted that, the converter that the application provides can be realized the electric current two-way flow, and " input " used and " output " during the application describes, be only for convenience such as input power, output etc., and infinite effect.
Compared with prior art, the application has the following advantages:
A kind of cascade bidirectional DC-DC converter that the application provides, comprise the first order bi-directional DC-DC circuit connected successively, the energy storage filter unit, second level bi-directional DC-DC circuit, first order bi-directional DC-DC circuit comprise two identical, the bidirectional three-level module be connected in parallel, the first order adopts two identical bidirectional three-level module module parallel connections, the second level adopts the bidirectional three-level module, this two-stage all can realize buck, two-stage circuit buck ratio multiplies each other, the total buck ratio of cascade circuit can reach more than 10 times, solved conventional non-isolated type bidirectional DC-DC converter buck than little inferior position, and just can realize higher buck ratio without adopting isolating transformer, and the first order adopts two identical bidirectional three-level module parallel connections, the input current of half is only born on each road, is of value to and reduces switching tube input current stress, is beneficial to the type selecting of switching tube.
The accompanying drawing explanation
Fig. 1 is a kind of typical non-isolation cascade bidirectional DC-DC converter schematic diagram provided in prior art;
Fig. 2 is a kind of isolated cascade bidirectional DC-DC converter schematic diagram provided in prior art;
Fig. 3 is cascade bidirectional DC-DC converter embodiment mono-schematic diagram that the application provides;
Fig. 4 is cascade bidirectional DC-DC converter embodiment bis-circuit diagrams that the application provides;
Fig. 5 is the cascade bidirectional DC-DC converter embodiment three-circuit figure that the application provides.
Embodiment
For above-mentioned purpose, the feature and advantage that make the application can become apparent more, the embodiment below in conjunction with accompanying drawing to the application is described in detail.
The prior art that compares, the application provides a kind of cascade bidirectional DC-DC converter, does not utilize isolating transformer and can realize high buck ratio.
Refer to Fig. 3, cascade bidirectional DC-DC converter embodiment mono-schematic diagram provided for the application, a kind of cascade bidirectional DC-DC converter that the present embodiment provides, comprise the first order bi-directional DC-DC circuit 300, energy storage filter unit Cbus, the second level bi-directional DC-DC circuit 400 that connect successively, first order bi-directional DC-DC circuit 300 comprises two bidirectional three-level modules identical, that be connected in parallel, is respectively the first bidirectional three-level module and the second bidirectional three-level module;
Second level bi-directional DC-DC circuit 400 comprises the 3rd bidirectional three-level module.
The cascade bidirectional DC-DC converter that the present embodiment provides, the first order adopts two identical bidirectional three-level module module parallel connections, the second level adopts the bidirectional three-level module, this two-stage all can realize buck, two-stage circuit buck ratio multiplies each other, the total buck ratio of cascade circuit can reach more than 10 times, has solved conventional non-isolated type bidirectional DC-DC converter buck than little inferior position, and without adopting isolating transformer just can realize higher buck ratio; And the first order adopts two identical bidirectional three-level module parallel connections, the input current of half is only born on each road, is of value to and reduces switching tube input current stress, is beneficial to the type selecting of switching tube.
Refer to Fig. 4, cascade bidirectional DC-DC converter embodiment bis-circuit diagrams that provide for the application.
As shown in Figure 4, described energy storage filter unit Cbus comprises the first that be connected in series, identical filter capacitor Cbus1+ and the second filter capacitor Cbus1-.
The first bidirectional three-level module comprises: the first inductance L 1, the first switching tube Q1, the 3rd switching tube Q3, the second inductance, second switch pipe Q2 and the 4th switching tube Q4;
One end of described the first inductance L 1 connects the anode of input power, and the other end of described the first inductance L 1 is connected with the first end of described the first filter capacitor Cbus1+ by described the 3rd switching tube Q3; The other end of described the first inductance L 1 connects the negative terminal of input power Vin by described the first switching tube Q1, second switch pipe Q2, the second inductance; The tie point of the first switching tube Q1 and second switch pipe Q2 is connected with the first end of the second filter capacitor Cbus1-with the second end of the first filter capacitor Cbus1+, and the second end of the second filter capacitor Cbus1-is connected with the tie point of second switch pipe Q2 with the second inductance by the 4th switching tube Q4;
Described the second bidirectional three-level module comprises: the 3rd inductance L 3, the 5th switching tube Q5, the 6th switching tube Q6, the 4th inductance L 4, the 7th switching tube Q7 and the 8th switching tube Q8;
One end of described the 3rd inductance L 3 connects the anode of input power Vin, and the other end of described the 3rd inductance L 3 is connected with the first end of described the first filter capacitor Cbus1+ by described the 7th switching tube Q7; The other end of described the 3rd inductance L 3 connects the negative terminal of input power Vin by described the 5th switching tube Q5, the 6th switching tube Q6, the 4th inductance L 4; The tie point of the 5th switching tube Q5 and the 6th switching tube Q6 is connected with the first end of the second filter capacitor Cbus1-with the second end of the first filter capacitor Cbus1+, and the second end of the second filter capacitor Cbus1-is connected with the tie point of the 6th switching tube Q6 with the 4th inductance L 4 by the 8th switching tube Q8.
As can be seen from Figure 4, the first bidirectional three-level module and the second bidirectional three-level module are relations in parallel, and input all connects the two ends of input power Vin, and output all connects the two ends of energy storage filter unit Cbus.
Described the 3rd bidirectional three-level module comprises the 5th inductance L 5, the 9th switching tube Q9, the tenth switching tube Q10, the 6th inductance L the 6, the 11 switching tube Q11 and twelvemo pass pipe Q12, and the 3rd filter capacitor Cbus+ and the 4th filter capacitor Cbus-;
The first end of described the 5th inductance L 5 is connected with the first end of described the first filter capacitor Cbus1+, the first end of described the 6th inductance L 6 is connected with the second end of described the second filter capacitor Cbus1-, the second end of the 5th inductance L 5 is connected with the second end of described the 6th inductance L 6 with the tenth switching tube Q10 by the 9th switching tube Q9, the second end of the 5th inductance L 5 is connected with the positive output end Vout+ of described cascade bidirectional DC-DC converter by the 11 switching tube Q11, the second end of the 6th inductance L 6 closes pipe Q12 by twelvemo and is connected with the negative output terminal Vout-of described cascade bidirectional DC-DC converter, the tie point of the 9th switching tube Q9 and the tenth switching tube Q10 is connected with the mid-point voltage output Vcom of described cascade bidirectional DC-DC converter,
Described the 3rd filter capacitor Cbus+ and the 4th filter capacitor Cbus-are connected in series between the positive output end Vout+ and negative output terminal Vout-of described cascade bidirectional DC-DC converter, and the tie point of the 3rd filter capacitor Cbus+ and the 4th filter capacitor Cbus-is connected with the mid-point voltage output Vcom of described cascade bidirectional DC-DC converter.
Described the 3rd filter capacitor Cbus+ is identical with the electric parameter of the 4th filter capacitor Cbus-.
Refer to Fig. 5, the cascade bidirectional DC-DC converter embodiment three-circuit figure provided for the application.Than the embodiment bis-shown in Fig. 4, the described circuit embodiments three-circuit of Fig. 5 figure also comprises the first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4, can realize bypass functionality.
Described the first K switch 1 is connected between the anode of the first end of described the first inductance L 1 and input power Vin;
Described second switch K2 is connected between the anode of the first end of described the 3rd inductance L 3 and input power Vin;
Described the 3rd K switch 3 is connected between the anode of the first end of described the first filter capacitor Cbus1+ and input power Vin;
Described the 4th K switch 4 is connected between the negative terminal of the second end of described the second filter capacitor Cbus1-and input power Vin.
The voltage of input power Vin is low voltage for example during 48V, and closed the first K switch 1 and second switch K2, disconnect the 3rd K switch 3, the 4th K switch 4; Now first order bi-directional DC-DC circuit and second level bi-directional DC-DC circuit work in boost mode or decompression mode according to system requirements.
When the voltage of input power Vin is high voltage for example during 200V, disconnect the first K switch 1 and second switch K2, closed the 3rd K switch 3 and the 4th K switch 4; First order bi-directional DC-DC circuit is bypassed (not working), and second level bi-directional DC-DC circuit works in boost mode or decompression mode according to system requirements, and now, the bidirectional DC-DC converter that the application provides works in so-called bypass mode.
The paper boost mode:
In boost mode (Boost pattern), two-stage bidirectional DC-DC circuit working is in boost mode and separately independent control, it is first order bi-directional DC-DC circuit working, regard first order bi-directional DC-DC circuit as input power after the voltage stabilization on Cbus1+ and Cbus1-, its on off state does not affect second level bi-directional DC-DC circuit, and now bi-directional DC-DC circuit in the second level is just started working.
Below introduce decompression mode:
In decompression mode (Buck pattern), two-stage bidirectional DC-DC circuit working is in decompression mode and separately independent control, it is second level bi-directional DC-DC circuit working, regard second level bi-directional DC-DC circuit as input power after Cbus1+ and Cbus1-are stable, its on off state does not affect first order bi-directional DC-DC circuit, and now first order bi-directional DC-DC circuit is started working.
The embodiment of the present application, by increasing the bypass circuit consisted of the first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4, can be applied to the occasion of various input voltage, and range of application is wide, and efficiency is higher.
Further, also comprise the 5th K switch 5, the first diode D1, the first resistance R 1;
Described the 5th K switch 5 is connected between the positive output end Vout+ of the anode of described input power Vin and described cascade bidirectional DC-DC converter;
Described the first diode D1 and the first resistance R 1 are connected in series between the positive output end Vout+ of described the 5th K switch 5 and described cascade bidirectional DC-DC converter;
One end of the anodic bonding of described the first diode D1 the 5th K switch 5, the negative electrode of described the first diode D1 connects an end of described the first resistance R 1;
Perhaps,
One end of described the first resistance R 1 of the anodic bonding of described the first diode D1, the negative electrode of described the first diode D1 connects the positive output end Vout+ of described cascade bidirectional DC-DC converter.
The branch road that wherein the 5th K switch 5, the first diode D1, the first resistance R 1 form is mainly as slow switch circuit, and the effect of the first diode D1 is forward conduction, and oppositely cut-off, be mainly to prevent reverse current; The effect of the first resistance R 1 is current limliting.
The converter that the application provides, the heavy current impact when initial, also be provided with circuit and delayed sequential.
When input power Vin is the energy storage devices such as storage battery, super capacitor, circuit working, when boost mode, initially has very large rush of current.
Under non-bypass mode (when K3 and K4 disconnect):
At first closed K5, input power Vin charges to Cbus+ and Cbus-by D1 and R1;
Then bi-directional DC-DC circuit working in the second level, in decompression mode, is given Cbus1+ and Cbus1-charging;
Finally disconnect K5, closed K1 and K2, two-stage bidirectional DC-DC circuit all works in boost mode.
Under bypass mode (when K1 and K2 disconnect):
At first closed K5, input power Vin charges to Cbus+ and Cbus-by D1 and R1;
Then disconnect K5, closed K3 and K4, second level bi-directional DC-DC circuit working is in boost mode.
It should be noted that, the cascade bidirectional DC-DC converter that the embodiment of the present application provides, also comprise input filter capacitor Cin;
Described input filter capacitor Cin is connected in parallel on the two ends of described input power Vin.
It should be noted that, in the converter that the application provides, described the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4, the 5th switching tube Q5, the 6th switching tube Q6, the 7th switching tube Q7, the 8th switching tube Q8, the 9th switching tube Q9, the tenth switching tube Q10, the 11 switching tube Q11 and twelvemo pass pipe Q12 are one or several in metal-oxide-semiconductor, IGBT pipe or SiC-MOS.
It should be noted that, the converter that the application provides can be realized the electric current two-way flow, and " input " used and " output " during the application describes, be only for convenience such as input power, output etc., and infinite effect.
The above, be only the application's preferred embodiment, not the application done to any pro forma restriction.Although this application has discloses as above with preferred embodiment, yet not in order to limit the application.Any those of ordinary skill in the art, do not breaking away from present techniques scheme scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to the present techniques scheme, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from the present techniques scheme,, all still belong in the scope of present techniques scheme protection any simple modification made for any of the above embodiments, equivalent variations and modification according to the application's technical spirit.
Claims (9)
1. a cascade bidirectional DC-DC converter, it is characterized in that, comprise the first order bi-directional DC-DC circuit, energy storage filter unit, the second level bi-directional DC-DC circuit that connect successively, first order bi-directional DC-DC circuit comprises two bidirectional three-level modules identical, that be connected in parallel, is respectively the first bidirectional three-level module and the second bidirectional three-level module;
Second level bi-directional DC-DC circuit comprises the 3rd bidirectional three-level module.
2. cascade bidirectional DC-DC converter according to claim 1, is characterized in that,
Described energy storage filter unit comprises the first that be connected in series, identical filter capacitor and the second filter capacitor.
3. cascade bidirectional DC-DC converter according to claim 2, is characterized in that, described the first bidirectional three-level module comprises: the first inductance, the first switching tube, the 3rd switching tube, the second inductance, second switch pipe and the 4th switching tube;
One end of described the first inductance connects the anode of input power, and the other end of described the first inductance is connected with the first end of described the first filter capacitor by described the 3rd switching tube; The other end of described the first inductance connects the negative terminal of input power by described the first switching tube, second switch pipe, the second inductance; The tie point of the first switching tube and second switch pipe is connected with the first end of the second filter capacitor with the second end of the first filter capacitor, and the second end of the second filter capacitor is connected with the tie point of second switch pipe with the second inductance by the 4th switching tube;
Described the second bidirectional three-level module comprises: the 3rd inductance, the 5th switching tube, the 6th switching tube, the 4th inductance, the 7th switching tube and the 8th switching tube;
One end of described the 3rd inductance connects the anode of input power, and the other end of described the 3rd inductance is connected with the first end of described the first filter capacitor by described the 7th switching tube; The other end of described the 3rd inductance connects the negative terminal of input power by described the 5th switching tube, the 6th switching tube, the 4th inductance; The tie point of the 5th switching tube and the 6th switching tube is connected with the first end of the second filter capacitor with the second end of the first filter capacitor, and the second end of the second filter capacitor is connected with the tie point of the 6th switching tube with the 4th inductance by the 8th switching tube.
4. cascade bidirectional DC-DC converter according to claim 3, it is characterized in that, described the 3rd bidirectional three-level module comprises the 5th inductance, the 9th switching tube, the tenth switching tube, the 6th inductance, the 11 switching tube and twelvemo pass pipe, and the 3rd filter capacitor and the 4th filter capacitor;
The first end of described the 5th inductance is connected with the first end of described the first filter capacitor, the first end of described the 6th inductance is connected with the second end of described the second filter capacitor, the second end of the 5th inductance is connected with the second end of described the 6th inductance with the tenth switching tube by the 9th switching tube, the second end of the 5th inductance is connected with the positive output end of described cascade bidirectional DC-DC converter by the 11 switching tube, the second end of the 6th inductance closes pipe by twelvemo and is connected with the negative output terminal of described cascade bidirectional DC-DC converter, the tie point of the 9th switching tube and the tenth switching tube is connected with the mid-point voltage output of described cascade bidirectional DC-DC converter,
Described the 3rd filter capacitor and the 4th filter capacitor are connected in series between the positive output end and negative output terminal of described cascade bidirectional DC-DC converter, and the tie point of the 3rd filter capacitor and the 4th filter capacitor is connected with the mid-point voltage output of described cascade bidirectional DC-DC converter;
Described the 3rd filter capacitor is identical with the electric parameter of the 4th filter capacitor.
5. cascade bidirectional DC-DC converter according to claim 4, is characterized in that,
Described cascade bidirectional DC-DC converter also comprises the first switch, second switch, the 3rd switch and the 4th switch;
Described the first switch is connected between the anode of the first end of described the first inductance and input power;
Described second switch is connected between the anode of the first end of described the 3rd inductance and input power;
Described the 3rd switch is connected between the anode of the first end of described the first filter capacitor and input power;
Described the 4th switch is connected between the negative terminal of the second end of described the second filter capacitor and input power.
6. cascade bidirectional DC-DC converter according to claim 4, is characterized in that,
Described the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, the 11 switching tube and twelvemo are closed pipe for one or several the combination in metal-oxide-semiconductor, IGBT pipe or SiC-MOS.
7. according to the described cascade bidirectional DC-DC converter of claim 4 or 5, it is characterized in that, described cascade bidirectional DC-DC converter also comprises the 5th switch, the first diode, the first resistance;
Described the 5th switch is connected between the positive output end of the anode of described input power and described cascade bidirectional DC-DC converter;
Described the first diode and the first resistance are connected in series between the positive output end of described the 5th switch and described cascade bidirectional DC-DC converter;
One end of the anodic bonding of described the first diode the 5th switch, the negative electrode of described the first diode connects an end of described the first resistance;
Perhaps,
One end of described the first resistance of the anodic bonding of described the first diode, the negative electrode of described the first diode connects the positive output end of described cascade bidirectional DC-DC converter.
8. according to the described cascade bidirectional DC-DC converter of claim 1 to 6 any one, it is characterized in that,
Described cascade bidirectional DC-DC converter also comprises input filter capacitor; Described input filter capacitor is connected in parallel on the two ends of described input power.
9. cascade bidirectional DC-DC converter according to claim 7, is characterized in that,
Described cascade bidirectional DC-DC converter also comprises input filter capacitor; Described input filter capacitor is connected in parallel on the two ends of described input power.
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| CN105337504A (en) * | 2015-08-31 | 2016-02-17 | 国家电网公司 | Mixed bridge-type isolated bidirectional DC converter and control method therefor |
| CN105337504B (en) * | 2015-08-31 | 2018-01-02 | 国家电网公司 | One kind mixing bridge arm type isolation type bidirectional DC converter and its control method |
| CN107104597A (en) * | 2017-05-27 | 2017-08-29 | 燕山大学 | High step-up ratio suspend interlock three level DC/DC converters and its control method |
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| CN108809094A (en) * | 2018-05-11 | 2018-11-13 | 山特电子（深圳）有限公司 | uninterruptible power supply, DC-DC converter and its control method and control device |
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| CN111431417B (en) * | 2020-04-27 | 2023-03-21 | 深圳供电局有限公司 | Bidirectional isolation DCDC converter with wide input range |
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Address after: 230088 Anhui city of Hefei province high tech Zone Xiyou Road No. 1699 Patentee after: SUNGROW POWER SUPPLY Co.,Ltd. Address before: 230088 Hefei high tech Zone, Anhui science and Technology Park weir Road, No. 88 Patentee before: SUNGROW POWER SUPPLY Co.,Ltd. |
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