CN211791274U - Cascaded boost DC-DC converter - Google Patents
Cascaded boost DC-DC converter Download PDFInfo
- Publication number
- CN211791274U CN211791274U CN201821850654.3U CN201821850654U CN211791274U CN 211791274 U CN211791274 U CN 211791274U CN 201821850654 U CN201821850654 U CN 201821850654U CN 211791274 U CN211791274 U CN 211791274U
- Authority
- CN
- China
- Prior art keywords
- port
- capacitor
- inductor
- energy storage
- storage module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004146 energy storage Methods 0.000 claims abstract description 55
- 239000003990 capacitor Substances 0.000 claims abstract description 38
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
A cascaded boost DC-DC converter comprises a capacitor inductor energy storage module 1 to a capacitor inductor energy storage module N, an inductor L1 to an inductor Ln-1 and a capacitor Co, wherein a capacitor inductor energy storage module j comprises a diode Dj _1, a capacitor Cj _1, an inductor Lj _1 and an electronic switch Sj, the electronic switch Sj comprises a diode Dj _2, an N-type MOS tube Mj _1 and a controller j, and the value range of j is 1 to N. The utility model discloses has following operating characteristic: the circuit has the advantages of simple structure, easy expansion, various applicable control methods, high efficiency, continuous input and output currents, common output and input voltages and consistent polarity, and the output voltage Vo is more than or equal to the direct-current power supply voltage Vi.
Description
Technical Field
The utility model relates to a direct current-direct current (DC-DC) converter, especially a cascade boost type DC-DC converter that input and output current are all continuous and input and output voltage homopolarity can construct the direct current electrical power generating system of many inputs and many outputs as the basic unit of high step-up voltage ratio, if: the system comprises a direct current power supply module parallel system, an LED array driving system, a distributed photovoltaic power generation system and the like.
Background
The existing basic DC-DC converter with the Boost function includes a Boost converter, a Buck-Boost converter, a Cuk converter, a Sepic converter and a Zeta converter. As listed in table 1, none of the 5 basic DC-DC converters with a boost function described above satisfies the requirement of "input and output currents are continuous and input and output voltages are of the same polarity" without considering the output capacitance.
TABLE 1
Cascading is a common means of achieving high boost ratios. When the basic DC-DC converter is adopted for cascade connection, only Boost or a combination of Speic and Zeta or a combination of Cuk and Cuk can meet the requirement that input and output currents are continuous and input and output voltages have the same polarity. However, the current discontinuity problem exists in the combination of Boost or Speic and Zeta, and the input and output non-common ground problem exists in the combination of Cuk and Cuk.
Disclosure of Invention
In order to overcome the problem that current discontinuity exists inside the Boost or combination of Speic and Zeta and the problem that input and output are not in common ground exists in the combination of Cuk and Cuk in the existing Boost type DC-DC converter cascading scheme 'input and output current is continuous and input and output voltage is in the same polarity', the utility model provides a cascaded Boost type DC-DC converter which can realize that interstage current is continuous and input and output are in common ground, thereby expanding the cascading variety of the DC-DC converter.
The utility model provides a technical scheme that its technical problem adopted is:
a cascade connection boost DC-DC converter comprises a capacitance inductance energy storage module 1 to a capacitance inductance energy storage module n, an inductance L1 to an inductance Ln-1 and a capacitance Co, the capacitance inductance energy storage module j is provided with a port Vij +, a port Voj + and a port Gndj, the port Vi1+ of the capacitance inductance energy storage module 1 is connected with the positive end of a direct current power supply Vi, the port Vo1+ of the capacitance inductance energy storage module 1 is connected with one end of the inductance L1, the other end of the inductance L1 is connected with the port Vi2+ of the capacitance inductance energy storage module 2, and so on, the other end of the inductance Ln-1 is connected with the port Vin + of the capacitance inductance energy storage module n, the port Von + of the capacitance inductance energy storage module n is simultaneously connected with one end of the capacitance Co and one end of a load Z, the other end of the load Z is simultaneously connected with the other end of the capacitance Co, the port dj of the capacitance inductance energy storage module j and the, j ranges from 1 to n, the capacitance and inductance energy storage module j comprises a diode Dj _1, a capacitor Cj _1, an inductance Lj _1 and an electronic switch Sj, the electronic switch Sj is provided with a port aj and a port bj, the anode of the diode Dj _1 is simultaneously connected with a port Vij + of the capacitance and inductance energy storage module j and a port aj of the electronic switch Sj, the cathode of the diode Dj _1 is simultaneously connected with one end of the capacitor Cj _1 and a port Voj + of the capacitance and inductance energy storage module j, the port bj of the electronic switch Sj is simultaneously connected with the other end of the capacitor Cj _1 and one end of the inductance Lj _1, and the other end of the inductance Lj _1 is connected with a port Gndj of the capacitance and inductance energy storage module j.
The utility model discloses a scheme, when electronic switch S1 ends, diode D1_1 switches on, and DC power supply Vi, diode D1_1, inductance L1 and electric capacity inductance energy storage module 2 constitute a return circuit, and DC power supply Vi, diode D1_1, electric capacity C1_1 and inductance L1_1 constitute another return circuit.
When the electronic switch S1 is turned on, the diode D1_1 is turned off, the dc power supply Vi, the electronic switch S1, and the inductor L1_1 form a loop, and the dc power supply Vi, the electronic switch S1, the capacitor C1_1, the inductor L1, and the capacitor-inductor energy storage module 2 form another loop.
By analogy, when the electronic switch Sn is cut off, the diode Dn _1 is conducted, the capacitance and inductance energy storage module n-1, the inductance Ln-1, the diode Dn _1, the capacitance Co and the load Z form a loop, and the capacitance and inductance energy storage module n-1, the inductance Ln-1, the diode Dn _1, the capacitance Cn _1 and the inductance Ln _1 form another loop.
When the electronic switch Sn is conducted, the diode Dn _1 is cut off, the capacitance and inductance energy storage module n-1, the inductance Ln-1, the electronic switch Sn and the inductance Ln _1 form a loop, and the capacitance and inductance energy storage module n-1, the inductance Ln-1, the electronic switch Sn, the capacitance Cn _1, the capacitance Co and the load Z form another loop.
Further, the electronic switch Sj adopts a one-way conducting electronic switch, that is, when the electronic switch Sj is conducting, the current flows in from the port aj and flows out from the port bj. This preference is to prevent current backflow.
Still further, the electronic switch Sj includes a diode Dj _2, an N-type MOS transistor Mj _1 and a controller j, the controller j has a port vgj, an anode of the diode Dj _2 is connected to a port aj of the electronic switch Sj, a cathode of the diode Dj _2 is connected to a drain of the N-type MOS transistor Mj _1, a source of the N-type MOS transistor Mj _1 is connected to a port bj of the electronic switch Sj, and a gate of the N-type MOS transistor Mj _1 is connected to the port vgj of the controller j.
And the controller j determines the working state of the N-type MOS tube Mj _1, and the controller j adopts a power supply control chip.
Further, the phases of the output signals vgs1 to vgsn of the controllers 1 to n are sequentially delayed by a set angle θ, and the value range of θ is 0 to 2 π.
The technical conception of the utility model is as follows: n-1 inductors are adopted to cascade n capacitance-inductance energy storage modules, so that high-gain and high-efficiency boost conversion is realized, and input current continuity, interstage current continuity, output current continuity, input and output common ground and unchanged output voltage polarity are realized.
The beneficial effects of the utility model are that: the cascade boost DC-DC converter circuit has the advantages of simple structure, easy expansion, various applicable control methods, high efficiency, continuous input and output current, common output and input voltage and consistent polarity, and the working characteristics that the output voltage Vo is greater than or equal to the DC power supply voltage Vi.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Fig. 2 is a timing diagram of signals output from the controller 1 to the controller n according to the present invention.
Fig. 3 is a waveform diagram of simulation operation of an embodiment of the present invention under the condition that θ is 0 when n is 3.
Fig. 4 is a waveform diagram of the simulation operation of the embodiment of the present invention under the condition of θ 2 pi/3 when n is 3.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 4, a cascaded boost DC-DC converter includes a capacitor-inductor energy storage module 1 to a capacitor-inductor energy storage module n, an inductor L1 to an inductor Ln-1 and a capacitor Co, the capacitor-inductor energy storage module j has a port Vij +, a port Voj + and a port Gndj, the port Vi1+ of the capacitor-inductor energy storage module 1 is connected to the positive terminal of a DC power Vi, the port Vo1+ of the capacitor-inductor energy storage module 1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to the port Vi2+ of the capacitor-inductor energy storage module 2, and so on, the other end of the inductor Ln-1 is connected to the port Vin + of the capacitor-inductor energy storage module n, the port Von + of the capacitor-inductor energy storage module n is simultaneously connected to one end of the capacitor Co and one end of a load Z, the other end of the load Z is simultaneously connected to the other end of the capacitor Co, the port dj of the capacitor-inductor energy storage module j and the, j ranges from 1 to n, the capacitance and inductance energy storage module j comprises a diode Dj _1, a capacitor Cj _1, an inductance Lj _1 and an electronic switch Sj, the electronic switch Sj is provided with a port aj and a port bj, the anode of the diode Dj _1 is simultaneously connected with a port Vij + of the capacitance and inductance energy storage module j and a port aj of the electronic switch Sj, the cathode of the diode Dj _1 is simultaneously connected with one end of the capacitor Cj _1 and a port Voj + of the capacitance and inductance energy storage module j, the port bj of the electronic switch Sj is simultaneously connected with the other end of the capacitor Cj _1 and one end of the inductance Lj _1, and the other end of the inductance Lj _1 is connected with a port Gndj of the capacitance and inductance energy storage module j.
Further, to prevent the current from flowing backwards, the electronic switch Sj adopts a one-way conducting electronic switch, that is, when the electronic switch Sj is conducting, the current flows in from the port aj and flows out from the port bj.
Still further, the electronic switch Sj includes a diode Dj _2, an N-type MOS transistor Mj _1 and a controller j, the controller j has a port vgj, an anode of the diode Dj _2 is connected to a port aj of the electronic switch Sj, a cathode of the diode Dj _2 is connected to a drain of the N-type MOS transistor Mj _1, a source of the N-type MOS transistor Mj _1 is connected to a port bj of the electronic switch Sj, and a gate of the N-type MOS transistor Mj _1 is connected to the port vgj of the controller j.
The controller j determines the working state of the N-type MOS tube Mj _1, and the controller j adopts a conventional power supply control chip, such as: UC3842 and IR 2110.
Further, the phases of the output signals vgs1 to vgsn of the controllers 1 to n are sequentially delayed by a set angle θ, which is in the range of 0 to 2 π (see FIG. 2).
When the embodiment is in a Continuous Conduction Mode (CCM), the inductor Lk _1 can be approximated as a constant current source (k ranges from 2 to n), and its steady-state operation includes the following stages.
(1) When the N-type MOS transistor M1_1 is turned off, the diode D1_1 is turned on, the dc power supply Vi, the diode D1_1, the inductor L1 and the capacitor-inductor energy storage module 2 form a loop, and the dc power supply Vi, the diode D1_1, the capacitor C1_1 and the inductor L1_1 form another loop. At this time, C1_1 charges, L1_1 discharges, and the operating state of L1 is related to the operating state of the lc-lc module 2.
(2) When the N-type MOS transistor M1_1 is turned on, the diode D1_1 is turned off, the dc power supply Vi, the diode D1_2, the N-type MOS transistor M1_1, and the inductor L1_1 form a loop, and the dc power supply Vi, the diode D1_2, the N-type MOS transistor M1_1, the capacitor C1_1, the inductor L1, and the capacitor-inductor energy storage module 2 form another loop. At this time, C1_1 discharges, L1_1 charges, and the operating state of L1 is related to the operating state of the lc-lc module 2.
And (3) when the N-type MOS tube Mn _1 is cut off, the diode Dn _1 is conducted, the capacitance inductance energy storage module N-1, the inductor Ln-1, the diode Dn _1, the capacitor Co and the load Z form a loop, and the capacitance inductance energy storage module N-1, the inductor Ln-1, the diode Dn _1, the capacitor Cn _1 and the inductor Ln _1 form another loop. At this time, Cn _1 is charged.
(4) When the N-type MOS tube Mn _1 is conducted, the diode Dn _1 is cut off, the capacitance inductance energy storage module N-1, the inductance Ln-1, the diode Dn _2, the N-type MOS tube Mn _1 and the inductance Ln _1 form a loop, and the capacitance inductance energy storage module N-1, the inductance Ln-1, the diode Dn _2, the N-type MOS tube Mn _1, the capacitance Cn _1, the capacitance Co and the load Z form another loop. At this time, Cn _1 is discharged.
Fig. 3 is a graph of a simulation operating waveform of the embodiment under the condition that θ is 0 when n is 3. Fig. 4 is a graph of simulated operating waveforms of the embodiment under the condition of θ 2 pi/3 when n is 3. As can be seen from fig. 3 and 4, the input current ii is continuous, the output current io3 is continuous, the inter-stage currents io1 and io2 are also continuous, and the output voltage Vo is larger than the dc power voltages Vi, and is common to ground and has the same polarity in the embodiment. As can be seen from a comparison of fig. 3 and 4, θ has an influence on the ripples of ii, io1, io2, and io 3.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather by the claims and their equivalents.
Claims (5)
1. A cascaded boost DC-DC converter, characterized in that: the converter comprises a capacitor inductor energy storage module 1 to a capacitor inductor energy storage module n, an inductor L1 to an inductor Ln-1 and a capacitor Co, wherein the capacitor inductor energy storage module j is provided with a port Vij +, a port Voj + and a port Gndj, the port Vi1+ of the capacitor inductor energy storage module 1 is connected with the positive end of a direct current power supply Vi, the port Vo1+ of the capacitor inductor energy storage module 1 is connected with one end of the inductor L1, the other end of the inductor L1 is connected with the port Vi2+ of the capacitor inductor energy storage module 2, and the like, the other end of the inductor Ln-1 is connected with the port Vin + of the capacitor inductor energy storage module n, the port Von + of the capacitor inductor energy storage module n is simultaneously connected with one end of the capacitor Co and one end of a load Z, the other end of the load Z is simultaneously connected with the other end of the capacitor Co, the port Gndj of the capacitor energy storage module j and the negative end of the direct, the capacitor inductor energy storage module j comprises a diode Dj _1, a capacitor Cj _1, an inductor Lj _1 and an electronic switch Sj, wherein the electronic switch Sj is provided with a port aj and a port bj, the anode of the diode Dj _1 is connected with the port Vij + of the capacitor inductor energy storage module j and the port aj of the electronic switch Sj at the same time, the cathode of the diode Dj _1 is connected with one end of the capacitor Cj _1 and the port Voj + of the capacitor inductor energy storage module j at the same time, the port bj of the electronic switch Sj is connected with the other end of the capacitor Cj _1 and one end of the inductor Lj _1 at the same time, and the other end of the inductor Lj _1 is connected with the port Gndj of the capacitor inductor energy storage module j.
2. A cascaded boost DC-DC converter according to claim 1, wherein: the electronic switch Sj adopts a one-way conductive electronic switch, that is, when the electronic switch Sj is conductive, the current flows in from the port aj and flows out from the port bj.
3. A cascaded boost DC-DC converter according to claim 2, wherein: the electronic switch Sj comprises a diode Dj _2, an N-type MOS tube Mj _1 and a controller j, wherein the controller j is provided with a port vgj, the anode of the diode Dj _2 is connected with the port aj of the electronic switch Sj, the cathode of the diode Dj _2 is connected with the drain electrode of the N-type MOS tube Mj _1, the source electrode of the N-type MOS tube Mj _1 is connected with the port bj of the electronic switch Sj, and the gate electrode of the N-type MOS tube Mj _1 is connected with the port vgj of the controller j.
4. A cascaded boost DC-DC converter according to claim 3, wherein: and the controller j determines the working state of the N-type MOS tube Mj _1, and the controller j adopts a power supply control chip.
5. A cascaded boost DC-DC converter according to claim 3 or 4, characterized in that: the phases of the output signals vgs1 to vgsn of the controllers 1 to n are sequentially delayed by a set angle theta, and the value range of the theta is 0 to 2 pi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821850654.3U CN211791274U (en) | 2018-11-12 | 2018-11-12 | Cascaded boost DC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821850654.3U CN211791274U (en) | 2018-11-12 | 2018-11-12 | Cascaded boost DC-DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211791274U true CN211791274U (en) | 2020-10-27 |
Family
ID=72906556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821850654.3U Expired - Fee Related CN211791274U (en) | 2018-11-12 | 2018-11-12 | Cascaded boost DC-DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211791274U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391151A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | Cascade step-up dc-dc converter |
| CN109474181A (en) * | 2018-11-12 | 2019-03-15 | 浙江工业大学 | A kind of cascade buck DC-DC converter |
-
2018
- 2018-11-12 CN CN201821850654.3U patent/CN211791274U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391151A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | Cascade step-up dc-dc converter |
| CN109474181A (en) * | 2018-11-12 | 2019-03-15 | 浙江工业大学 | A kind of cascade buck DC-DC converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Alghaythi et al. | Design of a high step-up DC-DC power converter with voltage multiplier cells and reduced losses on semiconductors for photovoltaic systems | |
| CN108988634B (en) | Three-phase interleaved bidirectional large-transformation-ratio DCDC converter and control method thereof | |
| US20130039102A1 (en) | Voltage boosting device and voltage boosting circuit | |
| CN112737330B (en) | High-gain Buck-Boost DC-DC converter | |
| CN111245236B (en) | Step-down DC-DC converter topological structure | |
| CN211791274U (en) | Cascaded boost DC-DC converter | |
| CN211791267U (en) | Cascaded boost type DC-DC converter | |
| CN115940641A (en) | Boost converter | |
| CN211296565U (en) | Cascaded buck DC-DC converter | |
| CN211296564U (en) | Step-up DC-DC converter with continuous input and output currents | |
| CN211791276U (en) | Cascaded step-down DC-DC converter | |
| Azar et al. | New single switch topology for non-isolated boost DC-DC converter based on voltage-lift technique | |
| Suryoatmojo et al. | Implementation of high voltage gain dc-dc boost converter for fuel cell application | |
| Salari et al. | Analysis of switched inductor three-level DC/DC converter | |
| CN211791275U (en) | Cascaded buck-boost DC-DC converter | |
| CN211791277U (en) | Cascaded buck-boost DC-DC converter | |
| CN211296566U (en) | Boost DC-DC converter | |
| Nandankar et al. | Comparison of improved converter topologies for high voltage gain | |
| CN109474181A (en) | A kind of cascade buck DC-DC converter | |
| CN211296563U (en) | Step-up DC-DC converter with continuous input and output currents | |
| CN109391151A (en) | Cascade step-up dc-dc converter | |
| CN113890341A (en) | Multi-input high-reliability Sepic DC-DC converter | |
| CN113890340A (en) | Single-input high-reliability capacitance-current consistent buck-boost DC-DC converter | |
| CN113965085A (en) | Single-input high-reliability capacitor current consistent Cuk DC-DC converter | |
| CN210490731U (en) | High step-up ratio DC conversion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |