CN105939108B - A kind of quasi- boost switching DC-DC converter of switched inductors type - Google Patents
A kind of quasi- boost switching DC-DC converter of switched inductors type Download PDFInfo
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- CN105939108B CN105939108B CN201610508664.8A CN201610508664A CN105939108B CN 105939108 B CN105939108 B CN 105939108B CN 201610508664 A CN201610508664 A CN 201610508664A CN 105939108 B CN105939108 B CN 105939108B
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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
-
- 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
- H02M3/1552—Boost converters exploiting the leakage inductance of a transformer or of an alternator as boost inductor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of quasi- boost switching DC DC converter circuits of switched inductors type, including voltage source, the switched inductors unit being made of the first inductance, the second inductance, the 4th diode, the 5th diode and the 6th diode, the quasi- boost switching unit in two ends being made of the first capacitance, the first diode, the first metal-oxide-semiconductor, third diode and switched inductors unit, second metal-oxide-semiconductor, second capacitance, the second diode, output diode, output filter capacitor and load.Entire circuit structure is simple, combines quasi- boost switching unit, switching capacity unit and the respective single-stage boosting characteristic of switched inductors unit, realizes the expansion of output voltage gain.
Description
Technical field
The present invention relates to power electronic circuit technical fields, and in particular to a kind of quasi- boost switching DC-DC of switched inductors type
Converter circuit.
Background technology
In fuel cell power generation, photovoltaic generation, due to single solar cell or single fuel cell provide it is straight
Galvanic electricity pressure is relatively low, cannot be satisfied the power demand of existing electrical equipment, can not meet the needs of grid-connected, generally requiring will be multiple
Battery is together in series the voltage for reaching required.On the one hand this method greatly reduces the reliability of whole system, on the other hand
It also needs to solve the problems, such as series average-voltage.For this reason, it may be necessary to can be the high-gain DC-DC converter that low voltage transition is high voltage.Closely
Several years switching boost converter SBI proposed are exported since the variation range of its output voltage is small in low-voltage high input voltage
Occasion, such as distributed energy grid-connected system and fuel cell system, traditional SBI converters become no longer to be applicable in.In order to expand
The scope of application of traditional SBI converters, it is necessary to be improved by topology and expand its output voltage gain.
Invention content
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of quasi- boost switching of switched inductors type is provided
DC-DC converter circuit, specific technical solution are as follows.
A kind of quasi- boost switching DC-DC converter circuit of switched inductors type, including voltage source, by the first inductance, the second electricity
Sense, the 4th diode, the switched inductors unit that the 5th diode and the 6th diode are constituted, by the first capacitance, the first diode,
The quasi- boost switching unit in two ends that first metal-oxide-semiconductor, third diode and switched inductors unit are constituted, the second metal-oxide-semiconductor, the second electricity
Hold, the second diode, output diode, output filter capacitor and load are constituted.
In a kind of above-mentioned quasi- boost switching DC-DC converter circuit of switched inductors type, the anode of the voltage source is respectively
It is connect with the anode of the cathode of the first capacitance and third diode；Positive the moon with the first diode respectively of first capacitance
Pole, the drain electrode of the first metal-oxide-semiconductor are connected with the anode of output diode；The source electrode of first metal-oxide-semiconductor respectively with third diode
Cathode, the first inductance one end connected with the anode of the 4th diode；The cathode of 4th diode is respectively with the five or two
One end of the cathode of pole pipe and the second inductance connects；The other end of first inductance respectively with the anode of the 5th diode and
The anode of six diodes connects；The leakage with the other end of the second inductance, the second metal-oxide-semiconductor respectively of the anode of first diode
The cathode of pole, the anode of the second capacitance and the 6th diode connects；The cathode of second capacitance respectively with the second diode
Anode, the cathode of output filter capacitor are connected with one end of load；The cathode of the output diode respectively with output filtered electrical
The anode of appearance is connected with the other end of load；The cathode of the voltage source respectively with the source electrode of the second metal-oxide-semiconductor, second diode
Cathode connects.
Compared with prior art, circuit of the present invention has the following advantages that and technique effect：The entire circuit structure letter of the present invention
It is single, easy to control, output voltage gain higher；Circuit of the present invention using quasi- boost switching unit single-stage buck characteristic and
The charge parallel characteristic of discharged in series of switched inductors and switching capacity realizes quasi- boost switching to increase output voltage
The expansion of converter output voltage gain.
Description of the drawings
Fig. 1 is the quasi- boost switching DC-DC converter circuit of a kind of switched inductors type in the specific embodiment of the invention.
Fig. 2 a, Fig. 2 b be a kind of quasi- boost switching DC-DC converter circuit of switched inductors type shown in Fig. 1 respectively its first
Metal-oxide-semiconductor and the second metal-oxide-semiconductor simultaneously turn on and simultaneously turn off the equivalent circuit diagram of period.
Fig. 3 is the gain curve and Boost, switching capacity Boost, the tradition sources Z DC- of circuit of the present invention
DC converters and the gain curve of the novel quasi- sources Z DC-DC converter compare figure.
Specific implementation mode
The above content is explained in detail technical scheme of the present invention, below in conjunction with attached drawing to the specific of the present invention
Implementation is further described.
With reference to figure 1, a kind of quasi- boost switching DC-DC converter circuit of switched inductors type of the present invention, including voltage
Source, the switched inductors unit being made of the first inductance, the second inductance, the 4th diode, the 5th diode and the 6th diode, by
The quasi- boost switching list in two ends that first capacitance, the first diode, the first metal-oxide-semiconductor, third diode and switched inductors unit are constituted
Member, the second metal-oxide-semiconductor, the second capacitance, the second diode, output diode Do, output filter capacitor and load RL.When the first metal-oxide-semiconductor
S1With the second metal-oxide-semiconductor S2When simultaneously turning on, the first diode D1, the second diode D2, third diode D3With the five or two pole
Pipe D5It is turned off, the 4th diode D4, the 6th diode D6Conducting；The voltage source ViWith the first capacitance C1Together in parallel the
One inductance L1With the second inductance L2Charging energy-storing；Meanwhile voltage source Vi, the first capacitance C1With the second capacitance C2Output is filtered together
Capacitance CfWith load RLPower supply.As the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2When simultaneously turning off, the first diode D1, the two or two
Pole pipe D2, third diode D3With the 5th diode D5It is both turned on, the 4th diode D4, the 6th diode D6With output diode Do
Shutdown；First inductance L1With the second inductance L2After series connection with the first capacitance C1Parallel connection, forming circuit；The voltage source ViWith first
Inductance L1With the second inductance L2Together to the second capacitance C2Charging, forming circuit；Meanwhile output filter capacitor CfTo loading RLInto
Row power supply.Entire circuit structure is simple, has higher output voltage gain.
The specific connection type of circuit of the present invention is as follows：The anode of the voltage source respectively with the cathode of the first capacitance and the
The anode of three diodes connects；First capacitance anode respectively with the cathode of the first diode, the first metal-oxide-semiconductor drain electrode and
The anode of output diode connects；The source electrode of first metal-oxide-semiconductor one end with the cathode of third diode, the first inductance respectively
It is connected with the anode of the 4th diode；The cathode of 4th diode respectively with the cathode of the 5th diode and the second inductance
One end connects；The other end of first inductance is connect with the anode of the anode of the 5th diode and the 6th diode respectively；Institute
State the anode of the first diode respectively with the other end of the second inductance, the drain electrode of the second metal-oxide-semiconductor, the anode of the second capacitance and the 6th
The cathode of diode connects；The cathode of second capacitance respectively with the anode of the second diode, the cathode of output filter capacitor
It is connected with one end of load；The other end of the cathode of the output diode respectively with the anode of output filter capacitor and load connects
It connects；The cathode of the voltage source is connect with the cathode of the source electrode of the second metal-oxide-semiconductor, the second diode respectively.
Fig. 2 a, Fig. 2 b give the process chart of circuit of the present invention.Fig. 2 a, Fig. 2 b corresponding are the first metal-oxide-semiconductors
S1With the second metal-oxide-semiconductor S2Simultaneously turn on and simultaneously turn off the equivalent circuit diagram of period.Solid line indicates there is electric current stream in converter in figure
The part crossed, dotted line indicate the part that no current flows through in converter.
The course of work of the present invention is as follows：
Stage 1, such as Fig. 2 a：First metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2It simultaneously turns on, at this time the first diode D1, the two or two
Pole pipe D2, third diode D3With the 5th diode D5It is turned off, the 4th diode D4, the 6th diode D6Conducting.Circuit is formed
Two circuits are respectively：Voltage source ViWith the first capacitance C1With the second capacitance C2Output filter capacitor C is given togetherfWith load RL
Charging, forming circuit；Voltage source ViWith the first capacitance C1To the first inductance L in parallel1With the second inductance L2Charging energy-storing is carried out,
Forming circuit.
Stage 2, such as Fig. 2 b：First metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2It simultaneously turns off, at this time the first diode D1, the two or two
Pole pipe D2, third diode D3With the 5th diode D5It is both turned on, the 4th diode D4, the 6th diode D6With output diode Do
Shutdown.Circuit forms three circuits, is respectively：Voltage source ViWith the first inductance L1With the second inductance L2The second capacitance is given together
C2Charging energy-storing, forming circuit；First inductance L1With the second inductance L2Together to the first capacitance C after series connection1Charging, forming circuit；
Output filter capacitor CfGive load RLPower supply, forming circuit.
To sum up situation, due to the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Switch triggering pulse it is identical, if switching tube S1
And S2Duty ratio be D, switch periods Ts.And set VL1And VL2Respectively the first inductance L1With the second inductance L2Both ends
Voltage, VC1、VC2Respectively the first capacitance C1With the second capacitance C2Voltage, VS1For and VS2Respectively the first metal-oxide-semiconductor S1With second
Metal-oxide-semiconductor S2Voltage between drain electrode and source electrode.In a switch periods TsInterior, it is V to enable output voltageo.When converter enters stable state
After work, voltage relationship derivation below is obtained.
Operation mode 1：First metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2It simultaneously turns on, shown in corresponding equivalent circuit diagram 2a, therefore
There is following formula：
VL1on=VL2on=Vi+VC1 (1)
VO=Vi+VC1+VC2 (2)
VS1=VS2=0 (3)
Metal-oxide-semiconductor S1And S2Turn-on time be DTs。
Operation mode 2：First metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2It is turned off, corresponding equivalent circuit is as shown in Figure 2 b, therefore
There is following formula：
VL1-off+VL2-off=-VC1 (4)
VL1-off+VL2-off=Vi-VC2 (5)
VS2=VC2 (6)
VS1=VC1 (7)
Metal-oxide-semiconductor S1And S2Turn-off time be (1-D) Ts。
According to the above analysis, inductance Flux consumption conservation principle, simultaneous are used respectively to the first inductance L1 and the second inductance L2
Formula (1), formula (4), formula (5) can obtain：
D(Vi+VC1)-(1-D)(VC1+VL2-off)=0 (8)
D(Vi+VC1)-(1-D)(VC1+VL1-off)=0 (9)
Simultaneous formula (8) and formula (9) can acquire：
Thus, simultaneous formula (8), formula (9) and formula (10) can obtain the first capacitance C1Voltage VC1, the second capacitance C2Voltage
VC2With voltage source ViBetween relational expression be：
Then by formula (2), formula (11) and formula (12), the output voltage V of circuit of the present invention can be obtainedoExpression formula is：
Then the expression formula of the output voltage gain of circuit of the present invention is：
It is illustrated in figure 3 the gain curve and Boost, switching capacity Boost, tradition of circuit of the present invention
The gain curve of the sources Z DC-DC converter and the novel quasi- sources Z DC-DC converter compares figure, and figure includes the gain of circuit of the present invention
Curve, the gain curve of the novel quasi- sources Z DC-DC converter, the gain curve of traditional sources Z DC-DC converter, switching capacity
The gain curve of Boost and the gain curve of Boost.As seen from the figure, circuit of the present invention duty ratio D not
In the case of 0.33, gain G can reach very big, and the duty ratio D of circuit of the present invention does not exceed 0.33.Therefore,
In contrast, the gain of circuit of the present invention is very high.
In conclusion circuit overall structure of the present invention is simple, and it is easy to control, combine quasi- boost switching unit single-stage lifting
The characteristic and switched inductors and switching capacity of pressure charge the characteristic of discharged in series parallel, realize output voltage gain into one
Step is promoted, and there is no the dash currents that inrush current and metal-oxide-semiconductor open moment.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by the embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (2)
1. a kind of quasi- boost switching DC-DC converter circuit of switched inductors type, it is characterised in that including voltage source（Vi）, switch electricity
Feel unit, quasi- boost switching unit, the second metal-oxide-semiconductor（S2）, the second capacitance（C2）Second diode（D2）, output diode（Do）、
Output filter capacitor（Cf）And load（RL）；The switched inductors unit is by the first inductance（L1）, the second inductance（L2）, the four or two
Pole pipe（D4）, the 5th diode（D5）, the 6th diode（D6）It constitutes；The quasi- boost switching unit is by the first diode（D1）、
First capacitance（C1）, the first metal-oxide-semiconductor（S1）, third diode（D3）It is constituted with foregoing switched inductors unit；The voltage
Source（Vi）Anode respectively with the first capacitance（C1）Cathode and third diode（D3）Anode connection；First capacitance
（C1）Anode respectively with the first diode（D1）Cathode, the first metal-oxide-semiconductor（S1）Drain electrode and output diode（Do）Anode
Connection；First metal-oxide-semiconductor（S1）Source electrode respectively with third diode（D3）Cathode, the first inductance（L1）One end and
Four diodes（D4）Anode connection；4th diode（D4）Cathode respectively with the 5th diode（D5）Cathode and
Two inductance（L2）One end connection；First inductance（L1）The other end respectively with the 5th diode（D5）Anode and the 6th
Diode（D6）Anode connection；First diode（D1）Anode respectively with the second inductance（L2）The other end, second
Metal-oxide-semiconductor（S2）Drain electrode, the second capacitance（C2）Anode and the 6th diode（D6）Cathode connection；Second capacitance（C2）
Cathode respectively with the second diode（D2）Anode, output filter capacitor（Cf）Cathode and load（RL）One end connection；Institute
State output diode（Do）Cathode respectively with output filter capacitor（Cf）Anode and load（RL）The other end connection；It is described
Voltage source（Vi）Cathode respectively with the second metal-oxide-semiconductor（S2）Source electrode, the second diode（D2）Cathode connection.
2. the quasi- boost switching DC-DC converter circuit of a kind of switched inductors type according to claim 1, it is characterised in that when
First metal-oxide-semiconductor（S1）With the second metal-oxide-semiconductor（S2）When simultaneously turning on, first diode（D1）, the second diode（D2）, third
Diode（D3）With the 5th diode（D5）It is turned off, the 4th diode（D4）With the 6th diode（D6）Conducting, voltage source（Vi）
With the first capacitance（C1）To the first inductance in parallel（L1）With the second inductance（L2）It charges simultaneously；Meanwhile voltage source（Vi）With first
Capacitance（C1）With the second capacitance（C2）Together to output filter capacitor（Cf）And load（RL）Power supply；When the first metal-oxide-semiconductor（S1）With
Two metal-oxide-semiconductors（S2）When simultaneously turning off, first diode（D1）, the second diode（D2）, third diode（D3）With the five or two
Pole pipe（D5）It is both turned on, the 4th diode（D4）With the 6th diode（D6）Shutdown, output diode（Do）Shutdown；Described first
Inductance（L1）With the second inductance（L2）After series connection with the first capacitance（C1）Parallel connection, forming circuit；The voltage source（Vi）, first electricity
Sense（L1）With the second inductance（L2）To the second capacitance（C2）Charging；Meanwhile output filter capacitor（Cf）To load（RL）Power supply.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849643A (en) * | 2017-01-26 | 2017-06-13 | 华南理工大学 | A kind of switching capacity type mixes quasi- Z source converters |
| CN108429454A (en) * | 2018-03-13 | 2018-08-21 | 广东工业大学 | A kind of biswitch DC-DC converter |
| CN109510462A (en) * | 2018-11-12 | 2019-03-22 | 浙江工业大学 | Step-up dc-dc converter |
| CN110829842B (en) * | 2019-11-18 | 2021-03-19 | 哈尔滨理工大学 | High-gain DC-DC converter of fuel cell for automobile |
| CN113258772B (en) * | 2021-05-11 | 2023-02-10 | 西安科技大学 | Secondary buck-boost converter adopting switch inductor |
| CN113179015A (en) * | 2021-05-12 | 2021-07-27 | 西安石油大学 | High-gain DC-DC converter based on Z boost structure |
| CN116780898B (en) * | 2023-08-14 | 2023-11-21 | 深圳市恒运昌真空技术有限公司 | High-gain Cuk converter and control method thereof |
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| CN105529925A (en) * | 2016-02-01 | 2016-04-27 | 浙江艾罗电源有限公司 | Boost convertor based on switch inductor |
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