CN108322044B - One kind being based on the magnetic-coupled Boost circuit of flyback - Google Patents
One kind being based on the magnetic-coupled Boost circuit of flyback Download PDFInfo
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- CN108322044B CN108322044B CN201810077998.3A CN201810077998A CN108322044B CN 108322044 B CN108322044 B CN 108322044B CN 201810077998 A CN201810077998 A CN 201810077998A CN 108322044 B CN108322044 B CN 108322044B
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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
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Abstract
One kind being based on the magnetic-coupled Boost circuit of flyback, and the anode of power supply is connect with the anode of the Same Name of Ends of inductance L1, the Same Name of Ends of winding N1 and diode D1 respectively, and the cathode of power supply and the emitter of power switch tube connect；The collector of power switch tube is connect with the anode of the non-same polarity of inductance L2, the cathode of diode D2 and diode D4 respectively；The non-same polarity of winding N1 is connect with the Same Name of Ends of winding N2, and the non-same polarity of winding N2 is connect with the anode of diode D5；The non-same polarity of inductance L1 is connect with the anode of diode D2, D3 respectively；The Same Name of Ends of inductance L2 is connect with the cathode of diode D2, D3 respectively；It is connected between the cathode of diode D5, D4 by capacitor C2；It is connected between the cathode of diode D4 and the emitter of power switch tube by capacitor C1；It is in parallel with capacitor C1, C2 respectively to load R1, R2.Circuit voltage gain with higher.The present invention effectively increases the voltage gain of circuit by the magnetic coupling between inductance and winding.
Description
Technical field
The present invention relates to power electronics DC converter fields, and in particular to one kind is based on the magnetic-coupled Boost liter of flyback
Volt circuit.
Background technique
The energy is the important material base for pushing human social development, along with the rapid development of global economy, environment with
Energy problem has become focus concerned by people.Currently, new energy and renewable energy such as solar energy are greatly developed and use,
Wind energy, geothermal energy etc. realize the sustainable development of the energy, make it to successfully manage environment with energy bring challenge to be domestic and international
The hot spot of focus of attention.
The electric energy that renewable energy generates be generally used to realize it is grid-connected, for load energy supply and to charge the battery, increasingly
More industrial applications uses the converter with high boosting gain characteristic, Front End Converter, uninterruptible power supply such as clean energy resource
Direct current standby energy resource system, car headlamp high-intensity gas discharge lamp and communication power supply etc..In general, too
The power output voltage that sun can generate is lower；Voltage after some operating condition leeward electric rectifications can not provide a stabilization for rear class
Qualified DC voltage, this just needs to introduce level-one DC converter between renewable energy device and rear class, realizes voltage
The promotion of gain, to meet operating condition.
The promotion of low-voltage may be implemented in traditional Boost, and the multiple generally promoted is smaller (4-5 times), when need
When wanting larger boosting multiple (10 times or more), need work under limit duty ratio: due to the presence of power device parasitic parameter,
Serious loss is caused in this way；In addition, the voltage stress of power switch tube and diode is identical as output voltage, so not
Conducive to the use of low conducting bearing power switching tube, while the Reverse recovery of output diode is serious, causes the decline of performance.
In conclusion studying the DC converter with high-gain performance in renewable energy system, the entirety of system can be improved
Performance.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides one kind based on the magnetic-coupled Boost boosting electricity of flyback
Road, circuit voltage gain with higher, and the voltage stress of its internal power switch tube is lower.
To achieve the goals above, the present invention provides one kind to be based on the magnetic-coupled Boost circuit of flyback, including two
Pole pipe D1~D5, inductance L1 and L2, winding N1 and N2, power switch tube, capacitor C1 and C2, load R1 and R2；Inductance L1 and L2,
Winding N1 and N2 are wound around on same root iron core；
The anode of power supply is connect with the anode of the Same Name of Ends of inductance L1, the Same Name of Ends of winding N1 and diode D1 respectively, electricity
The cathode in source and the emitter of power switch tube connect；The collector of power switch tube respectively with the non-same polarity of inductance L2, two
The cathode of pole pipe D2 is connected with the anode of diode D4；
The non-same polarity of winding N1 is connect with the Same Name of Ends of winding N2, the non-same polarity of winding N2 and the anode of diode D5
Connection；
The non-same polarity of inductance L1 is connect with the anode of the anode of diode D2 and diode D3 respectively；Inductance L2's is of the same name
End is connect with the cathode of the cathode of diode D1 and diode D3 respectively；
It is connected between the cathode of diode D5 and the cathode of diode D4 by capacitor C2；The cathode and power of diode D4
It is connected between the emitter of switching tube by capacitor C1；
It is in parallel with capacitor C1 to load R1；It is in parallel with capacitor C2 to load R2.
Direct-current input power supplying is in the case where power switch tube is connected in the present invention, can to the first inductance and the second inductance into
Row charging, by the coupling between winding and inductance, the first winding and the second winding can carry out energy storage simultaneously.And then it can lead to
The number of turns ratio for improving winding and inductance is crossed, is come so that second part output voltage significantly increases, to improve direct current liter
Total voltage gain of volt circuit, and power switch tube still has lower voltage stress.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention；
Fig. 2 is the voltage and current waveform of main element in booster circuit in the present invention；
Fig. 3 is the equivalent circuit diagram of booster circuit at the first mode of operation in the present invention；
Fig. 4 is the equivalent circuit diagram of booster circuit at the second mode of operation in the present invention；
Fig. 5 is the same core FCl mode of inductance and winding in the present invention；
Fig. 6 is the comparison of present example simulation data waveform Yu conventional voltage waveform.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Be based on the magnetic-coupled Boost circuit of flyback as shown in Figure 1, a kind of, including diode D1~D5, inductance L1 and
L2, winding N1 and N2, power switch tube, capacitor C1 and C2, load R1 and R2；As shown in figure 5, inductance L1 and L2, winding N1 and
N2 is wound around on same root iron core；
The anode of power supply is connect with the anode of the Same Name of Ends of inductance L1, the Same Name of Ends of winding N1 and diode D1 respectively, electricity
The cathode in source and the emitter of power switch tube connect；The collector of power switch tube respectively with the non-same polarity of inductance L2, two
The cathode of pole pipe D2 is connected with the anode of diode D4；
The non-same polarity of winding N1 is connect with the Same Name of Ends of winding N2, the non-same polarity of winding N2 and the anode of diode D5
Connection；
The non-same polarity of inductance L1 is connect with the anode of the anode of diode D2 and diode D3 respectively；Inductance L2's is of the same name
End is connect with the cathode of the cathode of diode D1 and diode D3 respectively；
It is connected between the cathode of diode D5 and the cathode of diode D4 by capacitor C2；The cathode and power of diode D4
It is connected between the emitter of switching tube by capacitor C1；It is in parallel with capacitor C1 to load R1；It is in parallel with capacitor C2 to load R2.
Below using Fig. 1 as main circuit structure, meanwhile, it is former in conjunction with the work in booster circuit in Fig. 3, Fig. 4 narration present invention
Reason.
Table 1: the conducting of power switch tube and diode of the booster circuit under inductor current continuous mode in the present invention,
Off state figure
As shown in table 1, which includes two kinds of operation modes in ccm mode, is respectively as follows:
First operation mode: power switch tube, diode D1 and diode D2 conducting, diode D3, diode D4 and two
Pole pipe D5 cut-off；
Second operation mode: power switch tube, diode D1 and diode D2 cut-off, diode D3, diode D4 and two
Pole pipe D5 conducting.
As shown in figure 3, in the first operation mode: inductance L1 and inductance L2 are in parallel, and direct current power source voltage directly adds respectively
It is loaded on inductance L1 and inductance L2 (parameter of two phase inductances is identical, the number of turns N), while charging to inductance L1 and inductance L2,
The number of turns of middle inductance L1 and inductance L2 is N, and the number of turns of winding N1 is N1, and the number of turns of winding N2 is N2.At this point, inductance L1 and inductance
The voltage U at the both ends L2L1And UL2It is equal to supply voltage Ui；Simultaneously because coupling, winding N1 both end voltage is N1/ N times
Inductive drop is equal to N1/ N times of supply voltage, winding N2 both end voltage are N2/ N times of inductive drop is equal to N2/ N times
Supply voltage.If the time that power switch tube is in on-state is ton；Inductance L1 electric current IL1 and inductance L2 electric current IL2It is equal, if
For IL.The energy of energy storage is 2U on this first inductance of stage and the second inductanceiILton.According to reverse excitation circuit principle, inductance and around
Group will not have electric current to flow through simultaneously, so working as power switch in the magnetic-coupled Boost circuit of flyback as shown in Figure 3
There is electric current to flow through when pipe is connected, in inductance L1 and inductance L2, and the Same Name of Ends of inductance L1 and inductance L2 is high potential, at this time around
The Same Name of Ends of group N1 and winding N2 is high potential, diode D5 cut-off.At this point, winding N1 both end voltage is N1/ N times inductance electricity
Pressure is equal to N1/ N times of supply voltage, winding N2 both end voltage are N2/ N times of inductive drop is equal to N2/ N times of power supply
Voltage；
The energy of energy storage is on this stage winding N1 and winding N2
As shown in figure 4, in the second operation mode: inductance L1 is serially connected with inductance L2, external dc power supply voltage with
It is connected, and charges jointly to capacitor C1；Winding N1 connects with winding N2, while series direct current supply voltage is filled to capacitor C2 jointly
Electricity.If the time that power switch tube is in off-state is toff, then the energy of inductance release is (U during this periodo1-Ui)ILtoff.When
When power switch tube turns off, the Same Name of Ends of winding N1 and winding N2 are low potential, diode D5 conducting, therefore, winding N1 with around
Group N2, external dc power supply voltage is serially connected to charge to capacitor C2, in the output diode cut-off of next cycle, by electricity
Hold C2 and provides voltage to load R2.Then the energy of inductance release is (U during this periodo2-Ui)toff。
When circuit works in stable state, inductance L1 and the energy of inductance L2 energy storage are equal with the energy of release in a cycle,
I.e.
ton=DTs；
toff=(1-D) Ts；
2UiILton=(Uo1-Ui)ILtoff；
Abbreviation obtains
Wherein, TsFor switch periods；D is the duty ratio of power switch tube conducting.
Similarly, the energy of winding energy storage is equal with the also energy of release in a cycle, i.e.,
Wherein D is the duty ratio of power switch tube conducting.
Therefore when the output of circuit stable state, the voltage gain G of circuit are as follows:
Fig. 6 shows the comparison of the simulation waveform of booster circuit output voltage and traditional waveform in the present invention.Positioned at top
It is the output voltage waveforms of the application, is traditional output voltage waveforms positioned at lower part, as a result, it is found that the liter of the application
The gain of volt circuit output voltage is noticeably greater than the voltage gain of booster circuit in the prior art.
In addition, Fig. 2 also shows the voltage and current waveform of main element in booster circuit in the present invention.
In conclusion proposed by the present invention be based on the magnetic-coupled Boost circuit of flyback, structure is simple, easy to control,
Under conditions of same duty cycle, the electricity of booster circuit can be greatly improved by the number of turns of rational design coupling inductance
Press gain；Meanwhile it can guarantee that the voltage stress of power switch tube in booster circuit is relatively low.
Claims (3)
1. one kind is based on the magnetic-coupled Boost circuit of flyback, which is characterized in that including diode D1~D5, inductance L1 and
L2, winding N1 and N2, power switch tube, capacitor C1 and C2, load R1 and R2；Inductance L1 and L2, winding N1 and N2 are wound around
On same root iron core；
The anode of power supply is connect with the anode of the Same Name of Ends of inductance L1, the Same Name of Ends of winding N1 and diode D1 respectively, power supply
Cathode and the emitter of power switch tube connect；The collector of power switch tube respectively with the non-same polarity of inductance L2, diode
The cathode of D2 is connected with the anode of diode D4；
The non-same polarity of winding N1 is connect with the Same Name of Ends of winding N2, and the non-same polarity of winding N2 and the anode of diode D5 connect
It connects；
The non-same polarity of inductance L1 is connect with the anode of the anode of diode D2 and diode D3 respectively；The Same Name of Ends of inductance L2 point
It is not connect with the cathode of the cathode of diode D1 and diode D3；
It is connected between the cathode of diode D5 and the cathode of diode D4 by capacitor C2；The cathode and power switch of diode D4
It is connected between the emitter of pipe by capacitor C1；
It is in parallel with capacitor C1 to load R1；It is in parallel with capacitor C2 to load R2.
2. according to claim 1 a kind of based on the magnetic-coupled Boost circuit of flyback, it is characterised in that, the function
Rate switching tube is metal-oxide-semiconductor or IGBT pipe.
3. according to claim 1 or 2 a kind of based on the magnetic-coupled Boost circuit of flyback, which is characterized in that second level
Pipe D1~D5 is fast recovery diode or Schottky diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810077998.3A CN108322044B (en) | 2018-01-26 | 2018-01-26 | One kind being based on the magnetic-coupled Boost circuit of flyback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810077998.3A CN108322044B (en) | 2018-01-26 | 2018-01-26 | One kind being based on the magnetic-coupled Boost circuit of flyback |
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| Publication Number | Publication Date |
|---|---|
| CN108322044A CN108322044A (en) | 2018-07-24 |
| CN108322044B true CN108322044B (en) | 2019-11-08 |
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| CN201810077998.3A Expired - Fee Related CN108322044B (en) | 2018-01-26 | 2018-01-26 | One kind being based on the magnetic-coupled Boost circuit of flyback |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110048611A (en) * | 2019-05-29 | 2019-07-23 | 哈尔滨工业大学 | High voltage gain Sofe Switch DC-DC converter based on switching capacity and coupling inductance |
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| US8368362B2 (en) * | 2010-09-02 | 2013-02-05 | National Formosa University | Boost-forward-flyback high gain converter |
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2018
- 2018-01-26 CN CN201810077998.3A patent/CN108322044B/en not_active Expired - Fee Related
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| CN108322044A (en) | 2018-07-24 |
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