CN205195559U - Novel DC -DC converter steps up - Google Patents
Novel DC -DC converter steps up Download PDFInfo
- Publication number
- CN205195559U CN205195559U CN201520937734.2U CN201520937734U CN205195559U CN 205195559 U CN205195559 U CN 205195559U CN 201520937734 U CN201520937734 U CN 201520937734U CN 205195559 U CN205195559 U CN 205195559U
- Authority
- CN
- China
- Prior art keywords
- inductance
- diode
- filter
- electric capacity
- connects
- 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
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a novel DC -DC converter steps up, including DC power supply, voltage promotion unit, switch tube, reaching the wave filter, PWM control signal is inputed to the control end of switch tube. Voltage promotes the unit and includes first inductance, second inductance, third inductance, fourth inductance, first electric capacity, second electric capacity, third electric capacity, first diode, second diode and third diode. The wave filter connects in parallel at the switch tube both ends, and the wave filter is the gamma mode filter of being established ties and being constituteed by filter inductor and filter capacitance, and the load is connected in parallel at the filter capacitance both ends. The utility model discloses a switched capacitor and the method that the inductance combined together improve voltage gain. Novel DC -DC converter steps up has higher voltage gain and lower arrival current line and lower output voltage ripple.
Description
Technical field
The utility model relates to electric energy conversion art, and especially a kind of have high voltage gain and lower input current line and the novel boost DC-DC converter compared with low output voltage ripple.
Background technology
The demand of the energy is constantly increased, and the memory space of traditional energy is limited, and constantly seek new forms of energy, make photovoltaic, the clean reproducible energies such as fuel cell get a lot of applications, in the application such as photovoltaic and fuel cell, the lower needs of general output dc voltage, first to its boosting, need to use and have high voltage gain and lower input current line and the boost DC-DC converter compared with low output voltage ripple.
Traditional circuit with boost function has Boost circuit, Z source circuit, forward converter, circuit of reversed excitation etc., and boost circuit structure is simple and easy to control, but voltage gain is lower, and input current ripple, output voltage ripple is larger.
The input current ripple of Z source circuit and output voltage ripple less, but input and output are not altogether, switching device stress is larger; It is very large that forward converter and circuit of reversed excitation voltage gain can do, but input current is discontinuous, and switching voltage and current stress are all comparatively large, and when needs carry out MPPT maximum power point tracking, control complicated, reliability is lower; Therefore rational in infrastructure in the urgent need to one, control simple, with low cost, input current ripple and the less large step-up ratio DC-DC converter of output voltage ripple.
Usually research is concentrated in two aspects both at home and abroad at present:
One is, traditional structure is brought out one's strengths to make up for one's weaknesses, the multiple circuit of normal employing combines, two or more traditional circuit is combined, circuit little for input current ripple is placed on prime, and voltage gain is high and that output voltage ripple is little circuit is placed on rear pole, after in the simplification carrying out circuit structure, such combination can make the voltage gain of circuit and the performance such as input current ripple and output voltage ripple greatly optimize, but electric energy conversion efficiency has sacrifice.
The focus of another research is, on the increasingly mature basis that pressure rising mechanism is studied, constantly probe into new circuit structure, study the less semiconductor components and devices of new use and control mode simple and reliable circuit structure topology, particularly reduce the use amount of controllable semiconductor switch device, compare controllable semiconductor switch device with other components and parts and seem more fragile, and price is higher, most fault is caused by the damage of controllable semiconductor switch device, therefore for increase reliability from circuit structure, need the use amount reducing controllable semiconductor switch device.
Utility model content
In order to solve the deficiencies in the prior art, the utility model proposes a kind of novel boost DC-DC converter, it has high voltage gain and lower input current line and comparatively low output voltage ripple.
The utility model adopts following technical scheme:
A kind of novel boost DC-DC converter, comprises DC power supply, voltage lift unit, switching tube and filter, the control end input pwm control signal of switching tube;
Described voltage lift unit comprises the first inductance, the second inductance, the 3rd inductance, the 4th inductance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first diode, the second diode and the 3rd diode;
The positive pole of described DC power supply connects the first inductance, and the first inductance connects the anode of the first diode, and the negative electrode of the first diode connects the negative pole of DC power supply through the first electric capacity; First inductance is through the second electric capacity connecting valve pipe; The negative electrode of the first diode also connects the second inductance, and the second inductance connects the anode of the 3rd diode; The anode of the second diode connects the negative electrode of the first diode and the junction of the second inductance, and the negative electrode of the second diode connects the 3rd inductance, the negative electrode connecting valve pipe simultaneously of the 3rd inductance and the 3rd diode; Be connected between the second diode cathode and the 3rd diode anode after 4th inductance and the 3rd capacitances in series;
Described filter is connected in parallel on switching tube two ends, and filter is the Γ mode filter be composed in series by filter inductance and filter capacitor, and load is connected in parallel on filter capacitor two ends.
Preferably, described switching tube is N channel enhancement metal-oxide-semiconductor.
Preferably, described first inductance, the second inductance, the 3rd inductance are iron sial core inductance; 4th inductance is hollow low value inductance.
Preferably, described filter inductance is ferrite core inductance.
The Advantageous Effects adopting as above technical scheme to obtain is:
4th inductance is hollow low value inductance, effectively can solve the larger problem of the initial current of electric capacity in pressure equalizing.
The utility model Zhi Xu mono-road pwm control signal acts on switching tube, and change by adopting the gain that duty ratio can change voltage, control circuit easily realizes.
Filter capacitor of the present utility model and filter inductance composition Γ mode filter, and the electric current of filter inductance is direction all the time, in switching tube conduction period by filter inductance supply filter capacitor and load current, at switching tube period of contact by filter inductance and filter capacitor powering load, all the time give filtered electrical perhaps load Injection Current is provided, make export voltage ripple very little.
The utility model, according to the feature of inductance boost and capacitor boost, is improve voltage gain and ensure the method that the less employing switched capacitor of ripple of input current combines with inductance, raising voltage gain.
Accompanying drawing explanation
Fig. 1 is novel boost DC-DC converter electrical block diagram.
Equivalent circuit diagram when Fig. 2 is switching tube conducting.
Equivalent circuit diagram when Fig. 3 is switching tube shutoff.
Fig. 4 is the voltage waveform view exported.
Embodiment
1 to 4 embodiment of the present utility model is described further by reference to the accompanying drawings:
As shown in Figure 1, a kind of novel boost DC-DC converter and Boost DC converter, comprise DC power supply DC, voltage lift unit, switching tube S1 and filter, the control end input pwm control signal of switching tube.
Voltage lift unit comprises the first inductance L 1, second inductance L 2, the 3rd inductance L 3, the 4th inductance L 4, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the first diode D1, the second diode D2 and the 3rd diode D3.The positive pole of DC power supply DC connects the anode that the first inductance L 1, first inductance L 1 connects the first diode, and the negative electrode of the first diode connects the negative pole of DC power supply through the first electric capacity C1; First inductance L 1 is through the second electric capacity C2 connecting valve pipe S1; The negative electrode of the first diode also connects the anode that the second inductance L 2, second inductance L 2 connects the 3rd diode; The anode of the second diode connects the negative electrode of the first diode and the junction of the second inductance, and the negative electrode of the second diode connects the 3rd inductance, the negative electrode connecting valve pipe simultaneously of the 3rd inductance and the 3rd diode; 4th inductance L 4 is connected between the second diode cathode and the 3rd diode anode after connecting with the 3rd electric capacity C3.
The switching tube S1 two ends of filter parallel connection, filter is the Γ mode filter be composed in series by filter inductance Lf and filter capacitor Cf, and load is connected in parallel on filter capacitor two ends.The Injection Current of traditional filter capacitor is discontinuous, and injecting the discontinuous period of filter capacitor, it is load supplying that filter capacitor needs with self energy storage, and voltage ripple is larger; Filter capacitor of the present utility model and filter inductance composition Γ mode filter, and the electric current of filter inductance is direction all the time, in switching tube conduction period by filter inductance supply filter capacitor and load current, at switching tube period of contact by filter inductance and filter capacitor powering load, all the time give filtered electrical perhaps load Injection Current is provided, make export voltage ripple very little.
Switching tube S1 is N channel enhancement metal-oxide-semiconductor.First inductance L 1 and the second inductance L 2 and the 3rd inductance L 3 are iron sial core inductance.4th inductance L 4 is hollow low value inductance.Filter inductance Lf is ferrite core inductance.
This novel boost DC-DC converter can be divided into two operating states according to the turn-on and turn-off of switching tube.
When switching tube conducting, as shown in Figure 2, the first inductance L 1 and the second electric capacity C2 and switching tube S1 form a loop to the flow direction of circuit, the first inductance L 1 by DC power supply and the second electric capacity C2 magnetize, the electric current of the first inductance L 1 increases, and the first inductance L 1 energy storage increases; Second inductance L 2 and the 3rd inductance L 3 magnetize by the second electric capacity C2 and the 3rd electric capacity C3, the electric current flowing through the second inductance L 2 and the 3rd inductance L 3 increases, and the energy storage of the second inductance L 2 and the 3rd inductance L 3 increases; 4th inductance L 4 is small inductor amount hollow inductance, and when switching tube S1 conducting is started, the curent change in circuit is more mild, requires lower to semiconductor device; Filter inductance Lf and filter capacitor Cf is simultaneously for load provides electric current.
When switching tube turns off, the flow direction of circuit as shown in Figure 3, DC power supply and the first inductance L 1, first diode D1, the second inductance L 2, the 3rd electric capacity C3, the 4th inductance L 4, the 3rd inductance L 3, filter inductance Lf form one article of loop, the energy storage of the first inductance L 1 and the second inductance L 2 and the 3rd inductance L 3 reduces in the process, the energy storage of filter inductance Lf increases, simultaneously for load and filter capacitor C4 provide electric current, filter capacitor Cf energy storage increases.
The booster type circuit of traditional continuous input current adopts the method for the method of independent switching inductance or independent switched capacitor mostly, the utility model according to the feature of inductance boost and capacitor boost, for improving voltage gain and ensureing that the ripple of input current is less.
The method that the utility model adopts switched capacitor to combine with inductance, improves voltage gain.The electric current of filter inductance is direction all the time, in switching tube conduction period by filter inductance supply filter capacitor and load current, at switching tube period of contact by filter inductance and filter capacitor powering load, all the time give filtered electrical perhaps load Injection Current is provided, make export voltage ripple very little.
The utility model Zhi Xu mono-road pwm control signal acts on switching tube, and change the gain of voltage by changing duty ratio, control circuit easily realizes; This circuit control signal generator can adopt the SG3525 chip introducing output voltage feedback controling mode to produce PWM ripple, chip itself has the push-pull type output function of Direct driver, can Direct driver switchable semiconductor devices, and cost is low, circuit structure is simple, and ripple is less.Certainly, other general PWM chip can also be adopted.The maximum duty cycle that SG3525 chip adopts the mode adding dead band single channel to be exported is restricted to 33% by 45%.By the duty ratio of control SG3525, control output voltage.
The relation of the duty ratio D of pwm control signal (pulse width modulation control signal) is different from traditional Boost circuit, and the output voltage of this circuit is V
out=(2-2D)/(1-3D) V
in, one can be obtained time near duty ratio is close to 0.33 and obtain voltage gain very greatly, and the D of traditional boost circuit needs close to 1, when the power output of circuit is certain, in one-period, the ON time of some semiconductor device is long, the ON time of other semiconductor device is just short, the semiconductor device making ON time in one-period short is larger at the average current of conduction period, higher to the parameter request of semiconductor device, other components and parts current stress be meanwhile directly connected with semiconductor device is also larger, if semiconductor device is directly connected with inductance, the peak current of inductance is larger, larger magnetic core is needed to avoid magnetic saturation, although this circuit uses inductance number more, but because current stress is yes less, the cumulative volume of inductance does not increase.
As shown in Figure 4, optimum configurations is L1 and Lf be 400uH, L2 and L3 parameter is 700uH.C1 and C3 is 470uF, C2 be 400uH, Cf is 1000uF, and diode forward conduction voltage drop 1V, MOSFET internal resistance is 0.1 Ω, and duty ratio is 20%.Can find out that ripple voltage is very little by output voltage waveforms.
Certainly; more than illustrate and be only preferred embodiment of the present utility model; the utility model is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the guidance of this specification; made all equivalently to substitute, obvious variant, within the essential scope all dropping on this specification, protection of the present utility model ought to be subject to.
Claims (3)
1. a novel boost DC-DC converter, is characterized in that, comprises DC power supply, voltage lift unit, switching tube and filter, the control end input pwm control signal of switching tube;
Described voltage lift unit comprises the first inductance, the second inductance, the 3rd inductance, the 4th inductance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first diode, the second diode and the 3rd diode;
The positive pole of described DC power supply connects the first inductance, and the first inductance connects the anode of the first diode, and the negative electrode of the first diode connects the negative pole of DC power supply through the first electric capacity; First inductance is through the second electric capacity connecting valve pipe; The negative electrode of the first diode also connects the second inductance, and the second inductance connects the anode of the 3rd diode; The anode of the second diode connects the negative electrode of the first diode and the junction of the second inductance, and the negative electrode of the second diode connects the 3rd inductance, the negative electrode connecting valve pipe simultaneously of the 3rd inductance and the 3rd diode; Be connected between the second diode cathode and the 3rd diode anode after 4th inductance and the 3rd capacitances in series;
Described filter is connected in parallel on switching tube two ends, and filter is the Γ mode filter be composed in series by filter inductance and filter capacitor, and load is connected in parallel on filter capacitor two ends.
2. the novel boost DC-DC converter of one according to claim 1, is characterized in that, described switching tube is N channel enhancement metal-oxide-semiconductor.
3. the novel boost DC-DC converter of one according to claim 1, is characterized in that, described filter inductance is ferrite core inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520937734.2U CN205195559U (en) | 2015-11-23 | 2015-11-23 | Novel DC -DC converter steps up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520937734.2U CN205195559U (en) | 2015-11-23 | 2015-11-23 | Novel DC -DC converter steps up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195559U true CN205195559U (en) | 2016-04-27 |
Family
ID=55788503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520937734.2U Expired - Fee Related CN205195559U (en) | 2015-11-23 | 2015-11-23 | Novel DC -DC converter steps up |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205195559U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512412A (en) * | 2018-06-15 | 2018-09-07 | 广东机电职业技术学院 | A kind of DC-DC power source structure of the positive negative output of the single tube lifting press based on Sepic |
| CN108649797A (en) * | 2018-06-15 | 2018-10-12 | 广东机电职业技术学院 | A kind of DC-DC power source structure based on the positive negative outputs of Boost |
| CN109245524A (en) * | 2018-11-16 | 2019-01-18 | 郑州科创电子有限公司 | A kind of hyperfrequency high-power soft switch chopper circuit |
| CN111130339A (en) * | 2019-12-26 | 2020-05-08 | 北京空间飞行器总体设计部 | High-voltage gain boost converter |
-
2015
- 2015-11-23 CN CN201520937734.2U patent/CN205195559U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512412A (en) * | 2018-06-15 | 2018-09-07 | 广东机电职业技术学院 | A kind of DC-DC power source structure of the positive negative output of the single tube lifting press based on Sepic |
| CN108649797A (en) * | 2018-06-15 | 2018-10-12 | 广东机电职业技术学院 | A kind of DC-DC power source structure based on the positive negative outputs of Boost |
| CN108649797B (en) * | 2018-06-15 | 2023-05-26 | 广东机电职业技术学院 | DC-DC power supply structure based on Boost positive and negative output |
| CN108512412B (en) * | 2018-06-15 | 2023-06-09 | 广东机电职业技术学院 | Single-tube buck-boost positive-negative output DC-DC power supply structure based on Sepic |
| CN109245524A (en) * | 2018-11-16 | 2019-01-18 | 郑州科创电子有限公司 | A kind of hyperfrequency high-power soft switch chopper circuit |
| CN111130339A (en) * | 2019-12-26 | 2020-05-08 | 北京空间飞行器总体设计部 | High-voltage gain boost converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203261235U (en) | High-gain SEPIC converter | |
| CN203233309U (en) | High-gain high-efficiency boost converter realized by three-winding coupling inductor | |
| CN204633600U (en) | A kind of novel crisscross parallel topology structure of stepping-up/stepping-down chopper circuit | |
| CN205178878U (en) | Single switch high -gain converter that contains voltage -multiplying unit | |
| CN205195559U (en) | Novel DC -DC converter steps up | |
| CN103929058A (en) | Two-phase interleaved converter based on coupled inductors | |
| CN103095134A (en) | Active network boost converter | |
| CN103391001B (en) | For the high-gain DC/DC converter of MPPT link of photovoltaic inverter | |
| CN102136792A (en) | Boost double-voltage power factor correction circuit utilizing reverse blocking IGBT | |
| CN102723869A (en) | Power converter | |
| CN104270085A (en) | DC/DC conversion circuit in solar photovoltaic power generation system | |
| CN104300780B (en) | Large power non-isolation DC/DC soft switching circuit | |
| CN203590033U (en) | High gain DC/DC converter applied in photovoltaic inverter MPPT link | |
| CN102075078A (en) | Low-input voltage bridgeless staggered voltage-multiplying power factor correction device | |
| CN204696954U (en) | A kind of three-phase resonant pole photovoltaic DC-to-AC converter | |
| CN203722473U (en) | Embedded single-switch Buck-Boost converter | |
| CN203775028U (en) | Two-phase staggered parallel converter based on coupling inductors | |
| CN103618448B (en) | The two-tube DC converter of coupling inductance with charge pump | |
| CN202679243U (en) | BJT type self-excited Buck converter with small main switch tube driving loss | |
| CN204696955U (en) | A kind of photovoltaic DC-to-AC converter adopting transformer auxiliary resonance | |
| CN203167377U (en) | A non-isolated driving power supply used for a LED fluorescent lamp | |
| CN109560702B (en) | DC three-level boost converter integrating coupling inductance technology | |
| CN108448892B (en) | Quadratic form is many times presses unit DC-DC converter for photovoltaic system | |
| CN108322044B (en) | One kind being based on the magnetic-coupled Boost circuit of flyback | |
| CN202043035U (en) | High-efficiency synchronous rectification buck-type switching converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20161123 |