CN219893176U - Three-winding coupling inductance type Boost converter - Google Patents
Three-winding coupling inductance type Boost converter Download PDFInfo
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- CN219893176U CN219893176U CN202321060374.3U CN202321060374U CN219893176U CN 219893176 U CN219893176 U CN 219893176U CN 202321060374 U CN202321060374 U CN 202321060374U CN 219893176 U CN219893176 U CN 219893176U
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Abstract
The utility model discloses a three-winding coupling inductance type Boost converter, which comprises: the direct current input voltage source is coupled with the primary winding of the inductor, the first secondary winding of the inductor, the second secondary winding of the inductor, the exciting inductor, the power switch tube, the first power diode, the second power diode, the third power diode, the fourth power diode, the fifth power diode, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth power diode, the sixth capacitor and the load resistor; the Boost converter is controlled to be turned on or off by controlling the power switch tube, an input low-ripple conversion circuit is not needed to be additionally connected, the control is easy, the volume and the cost are reduced, the output voltage is far higher than the input voltage all the time, the converter topology has a good boosting effect, and the requirement of the high-gain DC-DC converter can be better met. The utility model is used in the technical field of power electronic conversion.
Description
Technical Field
The utility model relates to the technical field of power electronic conversion, in particular to a three-winding coupling inductance type Boost converter.
Background
The output voltage of the photovoltaic module is generally not more than 50V, in order to obtain high output voltage grid-connected operation from a low voltage energy system, a high-voltage gain DC-DC converter is needed, and how to realize high-efficiency direct current power conversion technology of low voltage input and high voltage output becomes urgent need, so that the high-gain and high-efficiency DC-DC converter becomes one of research hotspots of vast students at home and abroad.
The high-gain Boost converter in the prior art is mainly divided into: 1) High-gain Boost converters based on coupling inductance achieve high voltage gain by designing the coupling inductance turns ratio, but a larger coupling inductance turns ratio results in a larger input current ripple. 2) The high-gain Boost converter based on the capacitor realizes high voltage gain by connecting the capacitors in series, but the Boost gain of the capacitor converter is limited, a plurality of capacitor units are needed, and the volume and the cost of the converter are increased, so that the capacitor converter is generally only suitable for low-power occasions. Therefore, how to design a DC-DC converter with low ripple is a subject of urgent study in the industry.
Disclosure of Invention
The utility model aims to provide a three-winding coupling inductance type Boost converter, which solves at least one technical problem existing in the prior art and provides at least one beneficial selection or creation condition.
The utility model solves the technical problems as follows: there is provided a three-winding coupled inductive Boost converter comprising: the direct current input voltage source, a primary winding of the coupling inductor, a first secondary winding of the coupling inductor, a second secondary winding of the coupling inductor, an excitation inductor, a power switch tube, a first power diode, a second power diode, a third power diode, a fourth power diode, a fifth power diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth power diode, a sixth capacitor and a load resistor;
the positive electrode of the direct current input voltage source is respectively connected with the negative electrode of the first capacitor, the homonymous end of the primary winding of the coupling inductor and one end of the exciting inductor, the exciting inductor is connected with the primary winding of the coupling inductor in parallel, the heteronymous end of the primary winding of the coupling inductor is respectively connected with the drain electrode of the power switch tube, the positive electrode of the first power diode and the negative electrode of the second capacitor, the negative electrode of the first power diode is respectively connected with the positive electrode of the first capacitor and the positive electrode of the second power diode, and the positive electrode of the second capacitor is respectively connected with the homonymous end of the first secondary winding of the coupling inductor and the positive electrode of the third power diode;
the cathode of the second power diode is respectively connected with the synonym end of the first secondary winding of the coupling inductor and the cathode of the third capacitor;
the anode of the third capacitor is respectively connected with the cathode of the third power diode, the anode of the fourth power diode and the cathode of the fourth capacitor;
the positive electrode of the fourth capacitor is respectively connected with the homonymous end of the second secondary winding of the coupling inductor and the positive electrode of the fifth power diode;
the synonym end of the second secondary winding of the coupling inductor is respectively connected with the cathode of the fourth power diode and the cathode of the fifth capacitor;
the anode of the fifth capacitor is connected with the cathode of the fifth power diode and the anode of the sixth power diode respectively;
the cathode of the sixth power diode is respectively connected with the anode of the sixth capacitor and one end of the load resistor;
the other end of the load resistor is respectively connected with the negative electrode of the sixth capacitor, the source electrode of the power switch tube and the negative electrode of the direct current input voltage source.
Further, the first power diode and the first capacitor form a passive clamp circuit.
Further, the primary winding of the coupling inductor, the first secondary winding of the coupling inductor, the third power diode and the third capacitor form a voltage doubling circuit.
Further, the second secondary winding, the fourth capacitor, the fifth capacitor, the fourth power diode and the fifth power diode of the coupling inductor form a staggered parallel circuit.
Further, the sixth capacitor and the load resistor form an output circuit.
Further, the power switch tube is an MOS tube.
The beneficial effects of the utility model are as follows: the Boost converter is controlled to be turned on or off by controlling the power switch tube, an input low-ripple conversion circuit is not needed to be additionally connected, the control is easy, the volume and the cost are reduced, the output voltage is far higher than the input voltage all the time, the converter topology has a good boosting effect, and the requirement of the high-gain DC-DC converter can be better met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.
FIG. 1 is a schematic diagram of a three-winding coupled inductor Boost converter according to an embodiment of the present utility model;
fig. 2 shows a driving signal V of a power switch tube according to an embodiment of the present utility model GS A signal waveform pattern within one switching period;
FIG. 3 is a schematic diagram of an operation process of a three-winding coupled inductor type Boost converter according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of another operation of a three-winding coupled inductor Boost converter according to an embodiment of the present utility model;
fig. 5 is a waveform diagram showing a simulation result of a boosting process of a three-winding coupling inductance type Boost converter according to an embodiment of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It should be noted that although functional block diagrams are depicted as block diagrams, and logical sequences are shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the block diagrams in the system. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Embodiment 1, referring to fig. 1 and 2, a three-winding coupled inductive Boost converter is provided, comprising: the direct current input voltage source Vin, a coupling inductor primary winding Lp, a coupling inductor first secondary winding LS1, a coupling inductor second secondary winding LS2, an excitation inductor Lm, a power switch tube S, a first power diode D1, a second power diode D2, a third power diode D3, a fourth power diode D4, a fifth power diode D5, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth power diode D6, a sixth capacitor C6 and a load resistor R0.
The positive pole of direct current input voltage source Vin is connected with the negative pole of first electric capacity C1 respectively, coupling inductance primary winding Lp 'S homonymous end and excitation inductance Lm' S one end, and excitation inductance Lm is parallelly connected with coupling inductance primary winding Lp, and coupling inductance primary winding Lp 'S heteronymous end is connected with power switch tube S' S drain electrode respectively, and first power diode D1 'S positive pole and second electric capacity C2' S negative pole are connected, first power diode D1 'S negative pole is connected with first electric capacity C1' S positive pole and second power diode D2 'S positive pole respectively, second electric capacity C2' S positive pole is connected with coupling inductance first vice side winding LS1 'S homonymous end, third power diode D3' S positive pole respectively.
The cathode of the second power diode D2 is respectively connected with the synonym end of the first secondary winding LS1 of the coupling inductor and the cathode of the third capacitor C3; the anode of the third capacitor C3 is respectively connected with the cathode of the third power diode D3, the anode of the fourth power diode D4 and the cathode of the fourth capacitor C4; the positive electrode of the fourth capacitor C4 is respectively connected with the homonymous end of the second secondary winding LS2 of the coupling inductor and the positive electrode of the fifth power diode D5; the synonym end of the second secondary winding LS2 of the coupling inductor is respectively connected with the cathode of the fourth power diode D4 and the cathode of the fifth capacitor C5; the anode of the fifth capacitor C5 is connected with the cathode of the fifth power diode D5 and the anode of the sixth power diode D6 respectively; the cathode of the sixth power diode D6 is respectively connected with the anode of the sixth capacitor C6 and one end of the load resistor R0; the other end of the load resistor R0 is respectively connected with the cathode of the sixth capacitor C6, the source electrode of the power switch tube S and the cathode of the direct current input voltage source Vin.
The first power diode D1 and the first capacitor C1 form a passive clamping circuit. The primary winding Lp of the coupling inductor, the first secondary winding LS1 of the coupling inductor, the third power diode D3 and the third capacitor C3 form a voltage doubling circuit.
The second secondary winding LS2, the fourth capacitor C4, the fifth capacitor C5, the fourth power diode D4 and the fifth power diode D5 of the coupling inductor form a staggered parallel circuit. The sixth capacitor C6 and the load resistor R0 form an output circuit.
During operation, the grid electrode of the power switch tube S is connected to the driving signal V GS . As shown in fig. 2, the abscissa in fig. 2 represents time, and the ordinate represents the driving signal V of the power switching transistor S GS Switching period T s The time interval of (2) is T0-T2, wherein T0 is the switching period T s T2 represents the switching period T s Let t1 be the end time of the operation process when the power switch tube S is turned on, and let the time duty ratio of the operation process when the power switch tube S is turned on be D, the operation process time interval when the power switch tube S is turned on be DT s Represented by t0 to t1; if the time duty ratio of the working process when the power switch tube S is turned off is 1-D, the working process time interval when the power switch tube SS is turned off is (1-D) T s Represented by t1 to t2.
The working process of the Boost converter is as follows: in a switching period T s The working process of the power switch tube SS in the power switch tube S is divided into the working process of the power switch tube S in the power switch tube SThe opening is specifically described as follows:
the grid access driving signal of the power switch tube S is V GS As can be seen from fig. 2 and 3, during the switching period T s Within the time period t0 to t1, V GS For high level, the power switch tube S is conducted, the direct current input voltage source Vin supplies energy, and the anode generates a first current i in Is a part of the current i of (a) C1 Flows through the first capacitor C1, the second power diode D2, the coupling inductance first secondary winding LS1, the second capacitor C2 and the power switch tube S in turn, returns to the cathode of the direct current input voltage source Vin, and a part of current (i in -i c1 ) The power switch tube S and the shunt structure sequentially flow through the excitation inductance Lm and the coupling inductance primary winding Lp, and return to the cathode of the direct current input voltage source Vin, and the excitation inductance Lm stores energy; coupling current i generated by coupling inductor first secondary winding LS1 LS1 Flows out from the same-name end, sequentially flows through a third power diode D3 and a third capacitor C3 and returns to the different-name end of the first secondary winding LS1 of the coupling inductor, and the coupling current i generated by the second secondary winding LS2 of the coupling inductor LS2 And one part of the current flows out from the homonymous terminal, flows through a fourth capacitor C4 and a fourth power diode D4 in sequence, returns to the heteronymous terminal of the second secondary winding LS2 of the coupling inductor, and one part of the current flows through a fifth capacitor C5 and a fifth power diode D5 in sequence, returns to the heteronymous terminal of the secondary winding of the coupling inductor, and the sixth capacitor C6 supplies power to the load resistor R0.
As can be seen from fig. 2 and 4, during the switching period T S Within the time period of t1 to t2, V GS For low level, the power switch tube S is turned off, the direct current input voltage source Vin supplies energy, and the first current i is generated by the positive electrode in The power flows through the exciting inductance Lm, the second capacitor C2, the first secondary winding LS1 of the coupling inductance, the third capacitor C3, the fourth capacitor C4, the second secondary winding LS2 of the coupling inductance, the fifth capacitor C5, the sixth power diode D6, the sixth capacitor C6 and the load resistor R0 in sequence, and finally returns to the negative electrode of the direct current input voltage source Vin; the exciting inductance Lm releases energy, a part of current is transmitted to the primary winding Lp of the coupling inductance, returns to the other end of the exciting inductance Lm, and a part of current i D1 Sequentially passes through the first power diode D1 and the first capacitor C1 and returns to the excitation inductance LmAnd the other end.
Boost output is achieved by turning on and off the power switch S.
In this embodiment, the power switch tube S may be a MOS tube, or may be an IGBT tube.
To further verify the effectiveness of the Boost converter of the present utility model, the simulation is performed in simple simulation software in this embodiment, where the parameters of the converter are set as follows:
the voltage of the direct current input voltage source Vin is 10V, the load resistance R0 is 100 omega, the inductance value of the excitation inductance Lm is set to be 100uH, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4 and the fifth capacitor C5 are all 100uF, the sixth capacitor C6 is 220uF, the switching frequency of the power switch tube S is 50kHz, and the duty ratio D is 50%. The inductance turns of the primary winding Lp of the coupling inductor are NP, the inductance turns of the first secondary winding LS1 of the coupling inductor are NS1, and the inductance turns of the second secondary winding LS2 of the coupling inductor are NS2; NP: NS1: ns2=1:1:1.
The waveform chart of the simulation result is shown in FIG. 5, referring to FIG. 5, the waveform is 4 layers from top to bottom, each layer transversely refers to the switching period, and the first layer is the driving signal V of the power switch tube S GS The low level is 0, the high level 15, the second layer is the voltage waveform of the direct current input voltage source Vin, the third layer is the current i flowing through the exciting inductance Lm Lm Layer 4 is the waveform of the output voltage Vo, the voltage of the direct current input power supply is constant at 10V, and the exciting inductance Lm current i Lm The low ripple wave between 7.3 and 8.3A, the fluctuation range is not more than 1A, the output voltage is 98.19V and is far higher than 10V, so that the power switch tube S in the converter is only controlled to be turned on or off simultaneously, an input low ripple wave conversion circuit is not needed to be additionally connected, the control is easy, the volume and the cost are reduced, the output voltage is far higher than the input voltage all the time, the converter topology is verified to have a good boosting effect, and the requirement of the high-gain DC-DC converter can be better met.
While the preferred embodiment of the present utility model has been described in detail, the utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the utility model, and these modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.
Claims (6)
1. A three-winding coupled inductive Boost converter, comprising: the direct current input voltage source, the primary winding of the coupling inductor, the first secondary winding of the combining inductor, the second secondary winding of the coupling inductor, the exciting inductor, the power switch tube, the first power diode, the second power diode, the third power diode, the fourth power diode, the fifth power diode, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth power diode, the sixth capacitor and the load resistor;
the positive electrode of the direct current input voltage source is respectively connected with the negative electrode of the first capacitor, the homonymous end of the primary winding of the coupling inductor and one end of the exciting inductor, the exciting inductor is connected with the primary winding of the coupling inductor in parallel, the heteronymous end of the primary winding of the coupling inductor is respectively connected with the drain electrode of the power switch tube, the positive electrode of the first power diode and the negative electrode of the second capacitor, the negative electrode of the first power diode is respectively connected with the positive electrode of the first capacitor and the positive electrode of the second power diode, and the positive electrode of the second capacitor is respectively connected with the homonymous end of the first secondary winding of the coupling inductor and the positive electrode of the third power diode;
the cathode of the second power diode is respectively connected with the synonym end of the first secondary winding of the coupling inductor and the cathode of the third capacitor;
the anode of the third capacitor is respectively connected with the cathode of the third power diode, the anode of the fourth power diode and the cathode of the fourth capacitor;
the positive electrode of the fourth capacitor is respectively connected with the homonymous end of the second secondary winding of the coupling inductor and the positive electrode of the fifth power diode;
the synonym end of the second secondary winding of the coupling inductor is respectively connected with the cathode of the fourth power diode and the cathode of the fifth capacitor;
the anode of the fifth capacitor is connected with the cathode of the fifth power diode and the anode of the sixth power diode respectively;
the cathode of the sixth power diode is respectively connected with the anode of the sixth capacitor and one end of the load resistor;
the other end of the load resistor is respectively connected with the negative electrode of the sixth capacitor, the source electrode of the power switch tube and the negative electrode of the direct current input voltage source.
2. The three-winding coupled inductor Boost converter of claim 1, wherein said first power diode and first capacitor comprise a passive clamp circuit.
3. The three-winding coupled inductor Boost converter of claim 1, wherein the primary winding of the coupled inductor, the first secondary winding of the coupled inductor, the third power diode, and the third capacitor form a voltage doubling circuit.
4. The three-winding coupled inductor Boost converter of claim 1, wherein the second secondary winding of the coupled inductor, the fourth capacitor, the fifth capacitor, the fourth power diode, and the fifth power diode form a staggered parallel circuit.
5. The three-winding coupled inductor Boost converter of claim 1, wherein said sixth capacitor and said load resistor comprise an output circuit.
6. The three-winding coupled inductor Boost converter of claim 1, wherein the power switching tube is a MOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321060374.3U CN219893176U (en) | 2023-05-06 | 2023-05-06 | Three-winding coupling inductance type Boost converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321060374.3U CN219893176U (en) | 2023-05-06 | 2023-05-06 | Three-winding coupling inductance type Boost converter |
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| CN219893176U true CN219893176U (en) | 2023-10-24 |
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| CN202321060374.3U Active CN219893176U (en) | 2023-05-06 | 2023-05-06 | Three-winding coupling inductance type Boost converter |
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