CN117614265A - Direct-current boost network converter with proportional coupling inductance and control method thereof - Google Patents
Direct-current boost network converter with proportional coupling inductance and control method thereof Download PDFInfo
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- CN117614265A CN117614265A CN202311544619.4A CN202311544619A CN117614265A CN 117614265 A CN117614265 A CN 117614265A CN 202311544619 A CN202311544619 A CN 202311544619A CN 117614265 A CN117614265 A CN 117614265A
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- 230000008878 coupling Effects 0.000 title claims abstract description 37
- 238000010168 coupling process Methods 0.000 title claims abstract description 37
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims description 34
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention belongs to the technical field of power electronic converters, and discloses a group of proportional coupling inductance direct current boost network converters and a control method thereof. The direct-current boost network converter with the proportional coupling inductor comprises a direct-current voltage source, a coupling inductor unit, an auxiliary boost capacitor and an output unit, wherein the output unit consists of a diode and a capacitor. The direct current boost network converter with the proportional coupling inductor greatly improves voltage gain and realizes continuous input current.
Description
Technical Field
The invention belongs to the technical field of power electronic converters, and particularly relates to a direct-current boost network converter with proportional coupling inductors and a control method thereof.
Background
The boost converter is widely applied to a front-stage converter of a distributed power system to realize the boost function. The traditional Boost converter circuit topology is a Boost circuit, in theory, the voltage gain of the Boost circuit increases along with the increase of the duty ratio, however, in consideration of the parasitic equivalent series impedance in the actual circuit, the actual gain of the Boost circuit does not always become larger along with the increase of the duty ratio, so that the Boost capability of the Boost circuit is very limited, the Boost circuit is not suitable for high-gain direct-current power conversion occasions, and the switching voltage is the same as the output voltage, so that a power switch with low on resistance cannot be used, and the system cost and loss are increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a direct current boost network converter with proportional coupling inductance and a control method thereof aiming at the defects of the background technology.
The invention is realized by the following technical scheme:
the invention provides a direct-current boost network converter with proportional coupling inductance, which comprises a direct-current voltage source V in Output capacitance C o Capacitance C 1 Coupled inductor winding N 1 Coupled inductor winding N 2 Output diode D o Diode D 1 The power switch tube S and the load resistor R;
DC voltage source V in Positive pole of (a) and coupled inductance winding N 1 Is connected with the positive electrode of the battery; coupling inductance winding N 1 Cathode and diode D of (2) 1 Positive electrode of (C) and capacitor (C) 1 The cathode of the power switch tube S is connected with the drain electrode of the power switch tube S; capacitor C 1 Positive pole of (a) and coupled inductance winding N 2 Is connected with the positive electrode of the battery; coupling inductance winding N 2 Cathode and diode D of (2) 1 Is connected with the cathode of the battery; diode D 1 Cathode and output diode D o Is connected with the positive electrode of the battery; output diode D o Cathode and output capacitance C of (2) o The positive electrode of the capacitor is connected with a load resistor R; load resistor R and output capacitor C o The cathode of the power switch tube S, the source of the power switch tube S and the cathode of the direct current power supply are connected.
High voltage gain is obtained and a continuous input current is achieved.
The invention also provides a control method of the direct current boost network converter with the proportional coupling inductance, which comprises the following steps of gs Which controls the on-off of the power switch S, and couples the winding current i of the inductor N1 、i N2 Diode D 1 Voltage V of (2) D1 Output diode D o Voltage V of (2) Do Voltage V of power switch S S The working process of the waveform is divided into 2 switching modes which are respectivelyThe switching modes 1 and 2 are specifically described as follows:
switching mode 1, corresponding to time t 1 ,t 2 ]: at this stage, the power switch tube is turned on, the DC voltage V in Coupling inductance winding N through power switch tube S 1 Charging, coupling inductance winding N 2 Through diode D 1 Give electric capacity C 1 Charging; output diode D o Reverse bias, output capacitance C o The load resistor R is independently powered, and the switching mode 1 is ended;
switching mode 2, corresponding to time t 2 ,t 3 ]: the power switch tube S is turned off, and the diode D 1 Turn-off, DC voltage V in Capacitance C 1 Coupled inductor winding N 1 And N 2 Through the output diode D o For load resistor R and output capacitor C o Supplying power when coupling the current i of the inductance winding N1 、i N2 When the switching mode is reduced to the lowest, the switching mode 2 is ended;
the gain expression obtained from the above analysis is:
wherein D is the on duty ratio of the power switch tube S, the working range is (0, 1), the turn ratio of the coupling inductance is N=N respectively 2 :N 1 。
The beneficial effects of the invention are as follows:
the invention realizes continuous input current and common ground performance when obtaining high voltage gain.
The invention is suitable for the occasion of high-gain direct current power conversion, and when the switching voltage is the same as the output voltage, the power switch with low on-resistance can be used, and the system cost and loss are reduced.
Drawings
FIG. 1 is a diagram of a direct current boost network converter with proportional coupling inductance;
FIG. 2 is a schematic diagram of a DC boost network converter with proportional coupling inductance;
fig. 3 (a) is an equivalent circuit diagram of a switching mode 1 of the dc boost network converter with proportional coupling inductance;
fig. 3 (b) is an equivalent circuit diagram of a switching mode 2 of the dc boost network converter with proportional coupling inductance;
fig. 4 is an experimental waveform when the input voltage vin=80v and the output voltage vo=260V.
The reference numerals in the figures illustrate: vin is a direct-current voltage source, S is a power switch tube, D1 is a first voltage-multiplying diode, C1 is an auxiliary boost capacitor, do is an output diode, co is an output capacitor, R is a load, and N 1 、N 2 For the two windings of the coupling inductance, the turns ratio of the coupling inductance is n=n, respectively 2 :N 1 。
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a direct-current boost network converter with proportional coupling inductance comprises a direct-current voltage source V in Output capacitance C o Capacitance C 1 Coupled inductor winding N 1 Coupled inductor winding N 2 Output diode D o Diode D 1 The power switch tube S and the load resistor R;
DC voltage source V in Positive pole of (a) and coupled inductance winding N 1 Is connected with the positive electrode of the battery; coupling inductance winding N 1 Cathode and diode D of (2) 1 Positive electrode of (C) and capacitor (C) 1 The cathode of the power switch tube S is connected with the drain electrode of the power switch tube S; capacitor C 1 Positive pole of (a) and coupled inductance winding N 2 Is connected with the positive electrode of the battery; coupling inductance winding N 2 Cathode and diode D of (2) 1 Is connected with the cathode of the battery; diode D 1 Cathode and output diode D o Is connected with the positive electrode of the battery; output diodeTube D o Cathode and output capacitance C of (2) o The positive electrode of the capacitor is connected with a load resistor R; load resistor R and output capacitor C o The cathode of the power switch tube S, the source of the power switch tube S and the cathode of the direct current power supply are connected.
High voltage gain is obtained and a continuous input current is achieved.
A control method of a direct current boost network converter of a direct current coupling inductor of a direct current type comprises the following steps of gs Which controls the on-off of the power switch S, and couples the winding current i of the inductor N1 、i N2 Diode D 1 Voltage V of (2) D1 Output diode D o Voltage V of (2) Do Voltage V of power switch S S The waveforms of (a) are shown in fig. 2, and the working process of the device is divided into 2 switching modes, namely a switching mode 1 and a switching mode 2, which are specifically described as follows:
switching mode 1, corresponding to time t in FIG. 2 1 ,t 2 ]: the equivalent circuit is shown in FIG. 3 (a), and at this stage, the power switch tube is turned on to direct current voltage V in Coupling inductance winding N through power switch tube S 1 Charging, coupling inductance winding N due to magnetic induction principle 2 Through diode D 1 Give electric capacity C 1 Charging; output diode D o Reverse bias, output capacitance C o The load resistor R is independently powered, and the switching mode 1 is ended;
switching mode 2, corresponding to time t in FIG. 2 2 ,t 3 ]: as shown in fig. 3 (b), the equivalent circuit is that the power switch tube S is turned off and the diode D 1 Turn-off, DC voltage V in Capacitance C 1 Coupled inductor winding N 1 And N 2 Through the output diode D o For load resistor R and output capacitor C o Supplying power when coupling the current i of the inductance winding N1 、i N2 When the switching mode is reduced to the lowest, the switching mode 2 is ended;
the gain expression obtained from the above analysis is:
wherein D is the on duty ratio of the power switch tube S, the working range is (0, 1), the turn ratio of the coupling inductance is N=N respectively 2 :N 1 。
The following data through specific experiments illustrate the beneficial effects of the structure of the invention:
as shown in fig. 4, the input voltage V in =80v, output voltage V o =260V, turn ratio n=1.6, turn-on duty cycle d=0.2, load r=210Ω. FIG. 4 (a) shows the output capacitance C o Voltage of about 260V and capacitance C 1 The voltage is 128V. FIG. 4 (b) shows an output diode D o Voltage peak value about 260V, diode D 1 The voltage peak is about 160V. Fig. 4 (c) shows the voltage of the power switch S as 100V and the input current. As can be seen from the figure, the input current is continuous and has a high output gain.
Claims (2)
1. A direct current boost network converter with proportional coupling inductance, which is characterized in that the converter comprises a direct current voltage source V in Output capacitance C o Capacitance C 1 Coupled inductor winding N 1 Coupled inductor winding N 2 Output diode D o Diode D 1 The power switch tube S and the load resistor R;
DC voltage source V in Positive pole of (a) and coupled inductance winding N 1 Is connected with the positive electrode of the battery; coupling inductance winding N 1 Cathode and diode D of (2) 1 Positive electrode of (C) and capacitor (C) 1 The cathode of the power switch tube S is connected with the drain electrode of the power switch tube S; capacitor C 1 Positive pole of (a) and coupled inductance winding N 2 Is connected with the positive electrode of the battery; coupling inductance winding N 2 Cathode and diode D of (2) 1 Is connected with the cathode of the battery; diode D 1 Cathode and output diode D o Is connected with the positive electrode of the battery; output diode D o Cathode and output capacitance C of (2) o The positive electrode of the capacitor is connected with a load resistor R; load resistor R and output capacitor C o The cathode of the power switch tube S, the source of the power switch tube S and the cathode of the direct current power supply are connected.
2. The control method of a direct current boost network converter of claim 1, wherein the control method is specifically a direct current boost network converter control signal V of a direct current boost network converter of a direct current coupled inductor of a direct current gs Which controls the on-off of the power switch S, and couples the winding current i of the inductor N1 、i N2 Diode D 1 Voltage V of (2) D1 Output diode D o Voltage V of (2) Do Voltage V of power switch S S The working process of the waveform is divided into 2 switching modes, namely a switching mode 1 and a switching mode 2, and the waveform is specifically described as follows:
switching mode 1, corresponding to time t 1 ,t 2 ]: at this stage, the power switch tube is turned on, the DC voltage V in Coupling inductance winding N through power switch tube S 1 Charging, coupling inductance winding N 2 Through diode D 1 Give electric capacity C 1 Charging; output diode D o Reverse bias, output capacitance C o The load resistor R is independently powered, and the switching mode 1 is ended;
switching mode 2, corresponding to time t 2 ,t 3 ]: the power switch tube S is turned off, and the diode D 1 Turn-off, DC voltage V in Capacitance C 1 Coupled inductor winding N 1 And N 2 Through the output diode D o For load resistor R and output capacitor C o Supplying power when coupling the current i of the inductance winding N1 、i N2 When the switching mode is reduced to the lowest, the switching mode 2 is ended;
the gain expression obtained from the above analysis is:
wherein D is the on duty ratio of the power switch tube S, the working range is (0, 1), the turn ratio of the coupling inductance is N=N respectively 2 :N 1 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311544619.4A CN117614265A (en) | 2023-11-20 | 2023-11-20 | Direct-current boost network converter with proportional coupling inductance and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311544619.4A CN117614265A (en) | 2023-11-20 | 2023-11-20 | Direct-current boost network converter with proportional coupling inductance and control method thereof |
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| CN117614265A true CN117614265A (en) | 2024-02-27 |
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| CN202311544619.4A Pending CN117614265A (en) | 2023-11-20 | 2023-11-20 | Direct-current boost network converter with proportional coupling inductance and control method thereof |
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- 2023-11-20 CN CN202311544619.4A patent/CN117614265A/en active Pending
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