CN213243821U - Boost converter with tap inductor and active side resonance unit - Google Patents
Boost converter with tap inductor and active side resonance unit Download PDFInfo
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- CN213243821U CN213243821U CN202022468370.1U CN202022468370U CN213243821U CN 213243821 U CN213243821 U CN 213243821U CN 202022468370 U CN202022468370 U CN 202022468370U CN 213243821 U CN213243821 U CN 213243821U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model belongs to the technical field of power electronic soft switch, a boost converter with a tap inductor and an active side resonance unit is disclosed, which comprises a voltage source, a leakage inductor, an excitation inductor, a tap inductor, a resonance capacitor, a first transistor, a second transistor and a diode; the positive pole of the voltage source is connected with the leakage inductance, and the negative pole of the voltage source is connected with the source electrode of the second transistor and the ground; the leakage inductance is connected with both the tap inductor and the excitation inductor, the tap end of the tap inductor is connected with the resonant inductor, and both the resonant capacitor and the excitation inductor are connected with a connecting wire between the tap inductor and the resonant inductor; the resonant inductor is connected with the drain electrode of the second transistor, the resonant capacitor is connected with the drain electrode of the first transistor, and the source electrode of the first transistor is connected with the source electrode of the second transistor; the tap inductor is connected with the anode of the diode, the cathode of the diode is connected with the load, and the load is connected with the source electrode of the first transistor, so that high voltage gain, high efficiency and high output power are realized.
Description
Technical Field
The utility model belongs to the technical field of the soft switch of power electronics, a inductance and active limit resonance unit's boost converter is taken a percentage in area is related to.
Background
A large amount of harmonic waves and reactive current are injected into a power grid by a traditional uncontrolled and controllable rectifying circuit, so that the power grid is polluted, and therefore, development and utilization of new energy resources are vigorously advocated in various countries. In renewable energy systems, boost DC/DC converters are widely used, and research on boost converters has been carried out with certain results, but in conventional boost converters, it is impossible to obtain high voltage gain, high efficiency and high output power at the same time. First, in a conventional boost converter, obtaining high voltage gain requires extremely high duty cycle, which increases current ripple and conduction loss; secondly, the switching voltage stress is almost equal to the output voltage, which forces the use of transistors with higher voltage ratings, resulting in a reduced converter efficiency; third, in conventional boost converters, there is significant reverse recovery current in the output diode, which also increases switching losses. These results in the inability of conventional boost converters to meet the operational control requirements of high voltage microgrid, and therefore, a need exists for boost converters with higher efficiency and high voltage gain.
Researchers have proposed that high voltage gain can be achieved using tapped inductors in converters because the leakage inductance of the tapped inductor can limit the rate of current change of the output diode, reducing reverse recovery losses, however, the leakage inductance of the inductor can cause voltage overshoot between the switches during turn-off, and in these topologies, a snubber circuit is required to reduce the voltage rating of the transistor. Another investigator has proposed that a voltage clamping method may be used to reduce the voltage stress on the transistor and recover the leakage energy, and that the transistor operates using Pulse Width Modulation (PWM) to reduce its voltage rating and minimize conduction loss; the clamp circuit recovers leakage energy and helps to reduce the off-voltage stress of the transistor, and the voltage gain can be further improved by an additional winding or a switched capacitor, but the circuit usually needs an additional transistor and a capacitor, the circuit structure and the control method are more complicated, and the working efficiency is also affected. Researchers also propose that high voltage gain can be realized by using the multiphase interleaving technology, high power density is obtained while current ripple is reduced, and in addition, reverse recovery current of an output diode is also reduced, but the circuit structure is complex, and the conduction loss does not achieve the ideal effect.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome among the above-mentioned prior art, boost converter current ripple is high with conduction loss, the converter is inefficient, voltage gain is low and the complicated shortcoming of circuit structure, provides a tap inductance and active limit resonance unit's boost converter in area.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a boost converter with a tap inductor and an active side resonant unit comprises a voltage source, a leakage inductor, an excitation inductor, a tap inductor, a resonant capacitor, a first transistor, a second transistor and a diode;
the positive pole of the voltage source is connected with the first end of the leakage inductance, and the negative pole of the voltage source is connected with the source electrode of the second transistor and the ground; the second end of the leakage inductance is connected with the first end of the tap inductor and the first end of the excitation inductor, the tap end of the tap inductor is connected with the first end of the resonance inductor, and the first end of the resonance capacitor and the second end of the excitation inductor are connected with the connecting line between the tap inductor and the resonance inductor; the second end of the resonant inductor is connected with the drain electrode of the second transistor, the second end of the resonant capacitor is connected with the drain electrode of the first transistor, and the source electrode of the first transistor is connected with the source electrode of the second transistor; the second end of the tap inductor is connected with the anode of the diode, the cathode of the diode is connected with the first end of the load, and the second end of the load is connected with the source electrode of the first transistor.
The utility model discloses further improvement lies in:
the first end of the output capacitor is connected with the cathode of the diode, and the second end of the output capacitor is connected with the source electrode of the first transistor.
The duty ratio of the first transistor and the duty ratio of the second transistor are not more than 0.6.
The diode is a freewheeling diode.
The first transistor is a MOSFET tube.
The second transistor is a MOSFET tube.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses take tap inductance and active limit resonance unit's boost converter, constitute resonance unit through resonance inductance and resonance electric capacity parallel connection, provide soft switch for all semiconductor device, effectively reduced switching loss, operating interval and the power that consumes; meanwhile, by utilizing a topological structure with a tap inductor and an active side resonance unit, the problem of voltage overshoot related to the negative effect of leakage inductance is solved, and the integral operation optimization of the converter is realized; in addition, by using a simple tap inductor structure and a transistor soft switching technology, effective duty ratio is not lost, the efficiency of the converter is improved, overshoot caused by leakage inductance is eliminated by the obtained current through a resonance unit formed by connecting the resonance inductor and the resonance capacitor in parallel, current ripple and conduction loss are reduced, and high voltage gain, high efficiency and high output power are finally realized.
Furthermore, by arranging the output capacitor C, alternating current components are filtered, the alternating current ripple coefficient is reduced, and the output voltage is more stable.
Furthermore, the first transistor and the second transistor adopt MOSFET tubes, and input current ripples are effectively reduced while the control circuit is switched on and switched off.
Drawings
Fig. 1 is a topology diagram of a boost converter with a tap inductor and an active side resonant unit according to the present invention;
fig. 2 is a schematic diagram of an operation mode 1 of the boost converter with the tap inductor and the active side resonant unit according to the present invention;
fig. 3 is a schematic diagram of an operation mode 2 of the boost converter with the tap inductor and the active side resonant unit according to the present invention;
fig. 4 is a schematic diagram of an operation mode 3 of the boost converter with the tap inductor and the active side resonant unit according to the present invention;
fig. 5 is a schematic diagram of an operation mode 4 of the boost converter with the tap inductor and the active side resonant unit according to the present invention;
fig. 6 is a schematic diagram of an operation mode 5 of the boost converter with the tap inductor and the active side resonant unit according to the present invention;
fig. 7 is a schematic diagram of an operation mode 6 of the boost converter with the tap inductor and the active side resonant unit according to the present invention;
fig. 8 is a schematic diagram of the operation mode 7 of the boost converter with the tap inductor and the active side resonant unit according to the present invention.
Wherein: vin is the input voltage; l isLkIs leakage inductance; l ismIs an excitation inductor; n is a radical of1And N2The number of turns of the tap inductor; l isrIs a resonant inductor; crIs a resonant capacitor; s1And S2Is a transistor; d is a diode; c is an output capacitor; roIs a load.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the present invention provides a boost converter with tap inductor and active side resonant unit, including a voltage source VinLeakage inductance LLkAnd an excitation inductor LmTap inductor and resonance inductor LrResonant capacitor CrA first transistor S1A second transistor S2And a diode D.
Voltage source VinPositive electrode and leakage inductance LLkIs connected to the first terminal of the first transistor S, and has a cathode connected to the second transistor S2Is connected to ground; leakage inductance LLkWith the first end of the tap inductor and the excitation inductor LmThe first ends of the tap inductors are all connected, and the tap end of the tap inductor is connected with the resonance inductor LrIs connected to a resonant capacitor CrFirst terminal and excitation inductance LmThe second ends of the two inductors are respectively connected with a tap inductor and a resonant inductor LrThe connection lines are connected with each other; resonant inductor LrAnd the second terminal of the second transistor S2Is connected to the drain of the resonant capacitor CrSecond terminal of and first transistor S1Is connected to the drain of the first transistor S1And the second transistor S2Is connected to the source of (a); first of tap inductorTwo ends of the first transistor are connected with the anode of a diode D, the cathode of the diode D is connected with the first end of a load, and the second end of the load is connected with a first transistor S1Is connected to the source of (a).
Wherein an input voltage source VinProviding a voltage to the system; leakage inductance LLkAnd an excitation inductance LmThe leakage inductance and the excitation inductance of the tap inductance are respectively used, the high voltage gain, the high efficiency and the high output power of the converter are ensured through the tap inductance, and the turn ratio of the tap inductance is required to ensure the voltage gain required in a reasonable duty ratio range (the maximum duty ratio D is approximately equal to 0.6); resonant inductor LrAnd a resonance capacitor CrThe parallel connection forms a resonance unit, soft switching is provided for all semiconductor devices, switching loss is reduced, and current ripple and conduction loss are reduced; the first transistor and the second transistor are MOSFET transistors, and input current ripples are reduced while the control circuit is switched on and switched off; the diode D is a freewheeling diode and provides a channel for load current when the first transistor and the second transistor are turned off; the output capacitor C is a filter capacitor and is used for filtering alternating current components, reducing alternating current ripple coefficients and enabling output voltage to be more stable.
The utility model provides a higher voltage gain not only can be guaranteed to the converter, through resonant inductor LrAnd a resonance capacitor CrThe parallel connection forms a resonance unit, soft switching is provided for all semiconductor devices, switching loss is effectively reduced, and the operation time interval and the consumed power are small; meanwhile, by utilizing a topological structure with a tap inductor and an active side resonance unit, the problem of voltage overshoot related to the negative effect of leakage inductance is solved, and the integral operation optimization of the converter is realized; in addition, the converter realizes the effective duty ratio without loss by using a simple tapped inductor structure and a transistor soft switching technology, improves the efficiency of the converter, and realizes the effective duty ratio by the resonance inductor LrAnd a resonance capacitor CrThe current obtained by the parallel resonance unit eliminates overshoot caused by leakage inductance, reduces current ripple and conduction loss, and finally achieves the purpose of simultaneously obtaining high voltage gain, high efficiency and high output power.
The working process of the utility model is introduced as follows:
as shown in fig. 2 to 8, there are seven different operating modes for a switching cycle, and in order to simplify the circuit analysis of the converter, the following assumptions are made: (1) except for leakage inductance L of tapped inductanceLkThe rest of the magnetic elements are ideal; (2) in one switching period, the exciting inductance LmThe current in (1) is constant; (3) neglecting the voltage drop on the diode D and the on-resistance of the transistor, and neglecting the parasitic parameters of all the elements; (4) the voltage of the output capacitor C is constant during one switching period.
Working mode 1: as shown in fig. 2, switch S is now on1Is turned on, switch S2Turning off, the diode D is reversely biased, and the output capacitor C is towards the load RoEnergy is supplied and this mode starts when the diode D is conducting. In this stage, the resonant capacitor CrAnd leakage inductance LLkResonant, voltage source charging tap inductor, switch S1Is gradually reduced, and when reduced to zero, the switch S1Off, the mode ends.
The working mode 2 is as follows: at this time, as shown in FIG. 3, switch S1And S2Are all closed, in this phase, the current comes from the voltage source VinFlows to the capacitor C and the load R through the tapped inductor and the forward biased diode DoTherefore, the energy of the voltage source and the energy accumulated in the tap inductor are transferred to the load, and the voltage boosting is realized.
Working mode 3: as shown in fig. 4, switch S1And S2Conducting at zero current, in this phase, the input current iinAnd resonant inductor current iS2Linearly increasing, diode current iDGradually decreases and when decreasing to zero, diode D turns off at zero current and this mode ends.
The working mode 4 is as follows: as shown in fig. 5, the capacitor CrAnd an inductance LrResonance occurs, resonance is half a period, and switch S1Current i ofS1Gradually decreasing, because the diode D is reverse biased, the energy of the output capacitor C is transferred to the load RoThe above.
The working mode 5 is as follows: when the switch S is turned on, as shown in FIG. 61Current i ofS1When equal to 0, switch S1Off, this mode begins. In this stage, switch S2Kept in the on state, the voltage source passing through the switch S2The energy of the output capacitor C is still transferred to the load R by charging the tapped inductoroThe above.
The working mode 6 is as follows: as shown in fig. 7, switch S1Conducting at zero current, the voltage source and the tap inductor to the capacitor CrCharging while the capacitor CrAnd an inductance LrResonance occurs, in this phase, switch S2Is gradually reduced, and when reduced to zero, the switch S2Off, this mode ends.
The working mode 7 is as follows: the voltage source and tap inductance at this stage are passed through switch S as shown in FIG. 81With constant current to the capacitor CrCharging until the voltage level of forward bias of diode D is reached, and this mode ends when diode D is turned on.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (6)
1. A boost converter with a tap inductor and an active side resonant unit is characterized by comprising a voltage source, a leakage inductor, an excitation inductor, a tap inductor, a resonant capacitor, a first transistor, a second transistor and a diode;
the positive pole of the voltage source is connected with the first end of the leakage inductance, and the negative pole of the voltage source is connected with the source electrode of the second transistor and the ground; the second end of the leakage inductance is connected with the first end of the tap inductor and the first end of the excitation inductor, the tap end of the tap inductor is connected with the first end of the resonance inductor, and the first end of the resonance capacitor and the second end of the excitation inductor are connected with the connecting line between the tap inductor and the resonance inductor; the second end of the resonant inductor is connected with the drain electrode of the second transistor, the second end of the resonant capacitor is connected with the drain electrode of the first transistor, and the source electrode of the first transistor is connected with the source electrode of the second transistor; the second end of the tap inductor is connected with the anode of the diode, the cathode of the diode is connected with the first end of the load, and the second end of the load is connected with the source electrode of the first transistor.
2. The boost converter with a tapped inductor and an active-side resonant cell as recited in claim 1, further comprising an output capacitor, wherein a first end of the output capacitor is connected to a cathode of the diode, and a second end of the output capacitor is connected to the source of the first transistor.
3. The boost converter with a tapped inductor and an active-side resonant cell as recited in claim 1, wherein the duty cycle of each of the first transistor and the second transistor is not greater than 0.6.
4. A boost converter with a tapped inductor and an active side resonant cell as recited in claim 1, wherein said diode is a freewheeling diode.
5. The boost converter with a tapped inductor and an active side resonant cell as recited in claim 1, wherein the first transistor is a MOSFET transistor.
6. The boost converter with a tapped inductor and an active side resonant cell as recited in claim 1, wherein the second transistor is a MOSFET transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022468370.1U CN213243821U (en) | 2020-10-30 | 2020-10-30 | Boost converter with tap inductor and active side resonance unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022468370.1U CN213243821U (en) | 2020-10-30 | 2020-10-30 | Boost converter with tap inductor and active side resonance unit |
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| CN213243821U true CN213243821U (en) | 2021-05-18 |
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| CN202022468370.1U Expired - Fee Related CN213243821U (en) | 2020-10-30 | 2020-10-30 | Boost converter with tap inductor and active side resonance unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022261914A1 (en) * | 2021-06-17 | 2022-12-22 | 华为技术有限公司 | Method for controlling resonant power supply, resonant conversion controller, and storage medium |
| TWI822501B (en) * | 2022-12-01 | 2023-11-11 | 國立臺灣科技大學 | Boost converter |
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2020
- 2020-10-30 CN CN202022468370.1U patent/CN213243821U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022261914A1 (en) * | 2021-06-17 | 2022-12-22 | 华为技术有限公司 | Method for controlling resonant power supply, resonant conversion controller, and storage medium |
| TWI822501B (en) * | 2022-12-01 | 2023-11-11 | 國立臺灣科技大學 | Boost converter |
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Granted publication date: 20210518 Termination date: 20211030 |