CN109510462A - Step-up dc-dc converter - Google Patents
Step-up dc-dc converter Download PDFInfo
- Publication number
- CN109510462A CN109510462A CN201811336729.0A CN201811336729A CN109510462A CN 109510462 A CN109510462 A CN 109510462A CN 201811336729 A CN201811336729 A CN 201811336729A CN 109510462 A CN109510462 A CN 109510462A
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- Prior art keywords
- diode
- inductance
- electronic switch
- capacitor
- port
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators without using an external clock
Abstract
A kind of step-up dc-dc converter, including inductance L1, diode D1, capacitor C1, inductance L2, diode D2, capacitor Co and 1 electronic switch, the electronic switch has port a and port b, one end of inductance L1 is connected with the anode of DC power supply Vi, the other end of inductance L1 is connected with the port a of the anode of diode D1 and electronic switch simultaneously, the cathode of diode D1 is connected with one end of one end of capacitor C1 and inductance L2 simultaneously, the other end of inductance L2 is connected with one end of one end of capacitor Co and load Z simultaneously, the port b of electronic switch is connected with the anode of the other end of capacitor C1 and diode D2 simultaneously, load the other end of Z while the other end with capacitor Co, the cathode of diode D2 is connected with the negative terminal of DC power supply Vi.The present invention has following operating characteristic: it is continuous to output and input electric current under CCM mode, and output voltage is greater than or equal to direct current power source voltage and same polarity.
Description
Technical field
The present invention relates to DC-DC (DC-DC) converter, especially one kind, to output and input electric current continuous and input
With the step-up dc-dc converter of output voltage same polarity, the direct current that basic unit sets up multi input and multi output can be used as
Source system, such as: DC power supplier parallel system, LED array drive system, distributed photovoltaic power generation system.
Background technique
The existing basic DC-DC converter with boost function includes Boost, One Buck-Boost converter body, Cuk
Converter, Sepic converter and Zeta converter.As listed in table 1, in the case where not considering output capacitance, above-mentioned this 5 kinds tools
There is the basic DC-DC converter of boost function to be all unsatisfactory for " it is continuous and output and input voltage homopolarity outputting and inputting electric current
The requirement of property ".
Table 1.
Summary of the invention
In order to overcome the existing basic DC-DC converter with boost function to be all unsatisfactory for " outputting and inputting electric current and connecting
It is continuous and output and input voltage same polarity " desired deficiency, the present invention provides a kind of step-up dc-dc converter, can be realized
It is continuous and output and input voltage same polarity that electric current is output and input under CCM mode, expands the type of DC-DC converter.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of step-up dc-dc converter, including inductance L1, diode D1, capacitor C1, inductance L2, diode D2, capacitor
Co and 1 electronic switch, the electronic switch have port a and port b, one end of inductance L1 and the anode phase of DC power supply Vi
Even, the other end of inductance L1 is connected with the port a of the anode of diode D1 and electronic switch simultaneously, and the cathode of diode D1 is simultaneously
Be connected with one end of one end of capacitor C1 and inductance L2, the other end of inductance L2 simultaneously with one end of capacitor Co and load Z one
End is connected, and the port b of electronic switch is connected with the anode of the other end of capacitor C1 and diode D2 simultaneously, loads the other end of Z
It is connected simultaneously with the negative terminal of the other end of capacitor Co, the cathode of diode D2 and DC power supply Vi.
In the present invention, it is assumed that the step-up dc-dc converter is in CCM mode, when electronic switch cut-off, diode
D1 conducting, DC power supply Vi, inductance L1, diode D1, capacitor C1 and diode D2 constitute a circuit, DC power supply Vi, electricity
Sense L1, diode D1, inductance L2, capacitor Co and load Z constitute another circuit；When electronic switch conducting, diode D1 is cut
Only, DC power supply Vi, inductance L1, electronic switch and diode D2 constitute a circuit, DC power supply Vi, inductance L1, electronic cutting
Pass, capacitor C1, inductance L2, capacitor Co and load Z constitute another circuit.
Further, the electronic switch uses the electronic switch of one-way conduction, i.e., its electric current is from end when electronic switch is connected
Mouth a is flowed into and is flowed out from port b.The preferred embodiment is electric current reflux in order to prevent.
Assuming that the step-up dc-dc converter is in DCM mode.When the electronic switch cut-off of one-way conduction and diode
When D2 is connected, diode D1 conducting, DC power supply Vi, inductance L1, diode D1, capacitor C1 and diode D2 constitute one and return
Road, DC power supply Vi, inductance L1, diode D1, inductance L2, capacitor Co and load Z constitute another circuit；When one-way conduction
Electronic switch cut-off and diode D2 end when, diode D1 conducting, DC power supply Vi, inductance L1, diode D1, inductance L2,
Capacitor Co and load Z constitute a circuit, until diode D1 is also switched off；When electronic switch conducting, diode D1 cut-off, directly
Galvanic electricity source Vi, inductance L1, electronic switch and diode D2 constitute a circuit, DC power supply Vi, inductance L1, electronic switch, electricity
Hold C1, inductance L2, capacitor Co and load Z and constitutes another circuit.
The electronic switch includes diode D3, N-type metal-oxide-semiconductor M1 and 1 controller, and the controller has port vg,
The anode of diode D3 is connected with the port a of the electronic switch, and the cathode of diode D3 is connected with the drain electrode of N-type metal-oxide-semiconductor M1,
The source electrode of N-type metal-oxide-semiconductor M1 is connected with the port b of the electronic switch, the gate pole of N-type metal-oxide-semiconductor M1 and the port of the controller
Vg is connected.
The controller determines the working condition of N-type metal-oxide-semiconductor M1, and the controller uses power supply control chip.
Technical concept of the invention are as follows: reasonable disposition diode D1, diode D2 and electronic switch enable capacitor C1, inductance
L1 and inductance L2 synergistically carries out energy storage within a duty cycle and releases energy, has not only realized efficient boosting inverter, but also realize
Under output voltage polarity is constant and CCM mode to output and input electric current continuous.
Beneficial effects of the present invention are mainly manifested in: the step-up dc-dc converter circuit structure is simple, has efficient
Output and input that electric current is continuous, output is consistent with input voltage polarity, output voltage Vo is greater than or equal under rate, CCM mode
The operating characteristic of direct current power source voltage Vi.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Fig. 2 is the simulation work waveform diagram under CCM mode of the embodiment of the present invention.
Fig. 3 is the simulation work waveform diagram under DCM mode of the embodiment of the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Referring to Fig.1~Fig. 3, a kind of step-up dc-dc converter, including inductance L1, diode D1, capacitor C1, inductance L2,
Diode D2, capacitor Co and 1 electronic switch, the electronic switch have port a and port b, one end of inductance L1 and direct current
The anode of power supply Vi is connected, and the other end of inductance L1 is connected with the port a of the anode of diode D1 and electronic switch simultaneously, two poles
The cathode of pipe D1 is connected with one end of one end of capacitor C1 and inductance L2 simultaneously, the other end of inductance L2 and meanwhile with capacitor Co one
It holding and is connected with one end of load Z, the port b of electronic switch is connected with the anode of the other end of capacitor C1 and diode D2 simultaneously,
The other end for loading Z is connected with the negative terminal of the other end of capacitor Co, the cathode of diode D2 and DC power supply Vi simultaneously.
Further, electric current reflux, the electronic switch use the electronic switch of one-way conduction, i.e. electronic switch in order to prevent
Its electric current is flowed into from port a and is flowed out from port b when conducting.
Further, the electronic switch includes diode D3, N-type metal-oxide-semiconductor M1 and 1 controller, the control utensil
There is port vg, the anode of diode D3 is connected with the port a of the electronic switch, and the cathode of diode D3 is with N-type metal-oxide-semiconductor M1's
Drain electrode is connected, and the source electrode of N-type metal-oxide-semiconductor M1 is connected with the port b of the electronic switch, the gate pole of N-type metal-oxide-semiconductor M1 and the control
The port vg of device is connected.
The controller determines the working condition of N-type metal-oxide-semiconductor M1, and the controller uses conventional power supply control chip,
Such as: UC3842.
When embodiment is in continuous conduction mode, that is, CCM mode, L2 can be approximately a constant-current source, entire steady operation mistake
Journey includes following 2 stages.
Stage 1:N type metal-oxide-semiconductor M1 cut-off, diode D1 conducting, DC power supply Vi, inductance L1, diode D1, capacitor C1 and
Diode D2 constitutes a circuit, and DC power supply Vi, inductance L1, diode D1, inductance L2, capacitor Co and load Z constitute another
A circuit.At this point, C1 charges, L1 puts magnetic.Input current ii and the equal linear decline of diode current iD2.
The conducting of stage 2:N type metal-oxide-semiconductor M1, diode D1 cut-off, diode D3 conducting, DC power supply Vi, inductance L1, two poles
Pipe D3, N-type metal-oxide-semiconductor M1 and diode D2 constitute a circuit, DC power supply Vi, inductance L1, diode D3, N-type metal-oxide-semiconductor M1,
Capacitor C1, inductance L2, capacitor Co and load Z constitute another circuit.At this point, C1 discharges, L1 magnetizes.Input current ii and two poles
The equal linear rise of tube current iD2.
Fig. 2 is the simulation work waveform diagram under embodiment CCM mode.As shown in Figure 2, the input current ii of embodiment connects
Continuous, output electric current io is continuous and ripple very little, output voltage Vo are greater than direct current power source voltage Vi, Vo and Vi same polarity.
When embodiment is in discontinuous conduction mode, that is, DCM mode, entire steady operation process includes following 4 stages.
The cut-off of stage 1:N type metal-oxide-semiconductor M1, diode D2 conducting, diode D1 conducting, DC power supply Vi, inductance L1, two poles
Pipe D1, capacitor C1 and diode D2 constitute a circuit, DC power supply Vi, inductance L1, diode D1, inductance L2, capacitor Co and
Load Z constitutes another circuit.At this point, C1 charges, L1 puts magnetic, and L2 magnetizes.Input current ii linear decline exports electric current io line
Property rise.
The cut-off of stage 2:N type metal-oxide-semiconductor M1, diode D2 cut-off, diode D1 conducting, DC power supply Vi, inductance L1, two poles
Pipe D1, inductance L2, capacitor Co and load Z constitute a circuit.At this point, diode current iD2 is 0, input current ii is equal to defeated
Electric current io out, linear downward trend.
The cut-off of stage 3:N type metal-oxide-semiconductor M1, diode D2 cut-off, diode D1 cut-off.At this point, input current ii, diode
Electric current iD2 and output electric current io is 0.
The conducting of stage 4:N type metal-oxide-semiconductor M1, diode D1 cut-off, diode D3 conducting, DC power supply Vi, inductance L1, two poles
Pipe D3, N-type metal-oxide-semiconductor M1 and diode D2 constitute a circuit, DC power supply Vi, inductance L1, diode D3, N-type metal-oxide-semiconductor M1,
Capacitor C1, inductance L2, capacitor Co and load Z constitute another circuit.At this point, C1 discharges, L1 magnetizes, and L2 magnetizes.Input current
Ii and the output equal linear rise of electric current io.
Fig. 3 is the simulation work waveform diagram under embodiment DCM mode.As shown in Figure 34 working stages of embodiment and
Output voltage Vo is greater than direct current power source voltage Vi, Vo and Vi same polarity.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in this field skill
Art personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (4)
1. a kind of step-up dc-dc converter, it is characterised in that: the step-up dc-dc converter includes inductance L1, diode
D1, capacitor C1, inductance L2, diode D2, capacitor Co and 1 electronic switch, the electronic switch have port a and port b, electricity
One end of sense L1 is connected with the anode of DC power supply Vi, the other end of inductance L1 while anode and electronic switch with diode D1
Port a be connected, the cathode of diode D1 is connected with one end of one end of capacitor C1 and inductance L2 simultaneously, the other end of inductance L2
It is connected simultaneously with one end of one end of capacitor Co and load Z, the port b of electronic switch while the other end and two poles with capacitor C1
The anode of pipe D2 is connected, load the other end of Z simultaneously with the other end of capacitor Co, the cathode of diode D2 and DC power supply Vi
Negative terminal is connected.
2. step-up dc-dc converter as described in claim 1, it is characterised in that: the electronic switch uses one-way conduction
Electronic switch, i.e., the electronic switch be connected when its electric current from port a flow into and from port b flow out.
3. step-up dc-dc converter as claimed in claim 2, it is characterised in that: the electronic switch include diode D3,
N-type metal-oxide-semiconductor M1 and 1 controller, the controller have port vg, the port of the anode of diode D3 and the electronic switch
A is connected, and the cathode of diode D3 is connected with the drain electrode of N-type metal-oxide-semiconductor M1, the source electrode of N-type metal-oxide-semiconductor M1 and the end of the electronic switch
Mouth b is connected, and the gate pole of N-type metal-oxide-semiconductor M1 is connected with the port vg of the controller.
4. step-up dc-dc converter as claimed in claim 3, it is characterised in that: the controller controls core using power supply
Piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811336729.0A CN109510462A (en) | 2018-11-12 | 2018-11-12 | Step-up dc-dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811336729.0A CN109510462A (en) | 2018-11-12 | 2018-11-12 | Step-up dc-dc converter |
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| Publication Number | Publication Date |
|---|---|
| CN109510462A true CN109510462A (en) | 2019-03-22 |
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ID=65748196
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811336729.0A Pending CN109510462A (en) | 2018-11-12 | 2018-11-12 | Step-up dc-dc converter |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011035998A (en) * | 2009-07-30 | 2011-02-17 | Yanmar Co Ltd | Dc-dc converter circuit |
| CN103595240A (en) * | 2013-11-20 | 2014-02-19 | 天津大学 | Device and method for reducing boosting amplitude of Boost type PFC converter |
| CN105939108A (en) * | 2016-06-30 | 2016-09-14 | 华南理工大学 | Switch inductor type quasi-switch voltage-boosting DC-DC converter |
| CN207504762U (en) * | 2017-11-13 | 2018-06-15 | 厦门雅迅网络股份有限公司 | A kind of anti-drop DC-DC booster circuit |
| CN108183609A (en) * | 2018-01-04 | 2018-06-19 | 东南大学 | A kind of cascade connection type DC/DC converters of the asymmetric boosting unit of photovoltaic system |
-
2018
- 2018-11-12 CN CN201811336729.0A patent/CN109510462A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011035998A (en) * | 2009-07-30 | 2011-02-17 | Yanmar Co Ltd | Dc-dc converter circuit |
| CN103595240A (en) * | 2013-11-20 | 2014-02-19 | 天津大学 | Device and method for reducing boosting amplitude of Boost type PFC converter |
| CN105939108A (en) * | 2016-06-30 | 2016-09-14 | 华南理工大学 | Switch inductor type quasi-switch voltage-boosting DC-DC converter |
| CN207504762U (en) * | 2017-11-13 | 2018-06-15 | 厦门雅迅网络股份有限公司 | A kind of anti-drop DC-DC booster circuit |
| CN108183609A (en) * | 2018-01-04 | 2018-06-19 | 东南大学 | A kind of cascade connection type DC/DC converters of the asymmetric boosting unit of photovoltaic system |
Non-Patent Citations (2)
| Title |
|---|
| 方飞等: "BUCK型变换器的不同工作模式分析与仿真", 《佳木斯大学学报(自然科学版)》 * |
| 陆治国等: "一种适用于燃料电池系统的DC/DC变换器", 《电力电子技术》 * |
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Application publication date: 20190322 |