CN111446854B - Extensible Zeta DC-DC converter - Google Patents

Extensible Zeta DC-DC converter Download PDF

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CN111446854B
CN111446854B CN202010364925.XA CN202010364925A CN111446854B CN 111446854 B CN111446854 B CN 111446854B CN 202010364925 A CN202010364925 A CN 202010364925A CN 111446854 B CN111446854 B CN 111446854B
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capacitor
basic
converter
diode
zeta
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CN111446854A (en
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邾玢鑫
刘光辉
张耀
佘小莉
陈世环
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China Three Gorges University CTGU
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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
    • 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
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • 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
    • H02M3/08—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

An expandable Zeta DC-DC converter, the converter comprising: an input power source, a loadR L A basic Zeta DC-DC converter,na plurality of base units; the basic Zeta DC-DC converter includes: two inductorsL 1 、L 2 Two capacitorsC 1 、C 2 A power switch S 1 One diode D 1 . Compared to a conventional Zeta-DC converter, the converter of the invention has: the voltage regulation range of the input and output voltage is wide, the voltage stress of the switching device is low, and the like, and the voltage regulation device is suitable for application occasions with wide input or output voltage variation ranges.

Description

Extensible Zeta DC-DC converter
Technical Field
The invention relates to a wide input and output buck-boost DC/DC converter, in particular to a novel expandable Zeta DC-DC converter.
Background
In the current literature, key devices or schemes for improving the input/output gain of a DC-DC converter can be divided into an isolation type, a cascade type, a coupling inductance type, a switched capacitor type, a voltage gain unit type or a combination type of a plurality of modes. However, most of the above schemes are developed based on Boost converters, and therefore only have high boosting capability, no voltage reducing capability, and some schemes have cases where the input/output ratio must be greater than 2. Therefore, the above-described scheme is difficult to apply in some cases where the voltage variation range is large, particularly in cases where the voltage reduction is sometimes required.
The traditional non-isolated Buck-boost DC-DC converter has Buck-Boost, cuk, SEPIC and Zeta circuits. Theoretically, by adjusting the duty ratio D, the input/output gain of these converters can be changed from zero to infinity, and the input/output voltage conversion ratio can be adjusted in a wider range. However, under actual conditions, when these converters operate in boost mode, especially when the duty ratio is close to 1, the input/output gain ratio is not increased or decreased due to the influence of parasitic parameters of circuits and components, and the adjustment range of the input/output gain ratio is greatly limited. Therefore, research on the novel wide input and output buck-boost DC/DC converter which can realize high-gain boost and retain the buck capability on the basis of the existing buck-boost DC-DC converter has important significance.
Disclosure of Invention
The method aims to solve the problem of limitation of the existing non-isolated high-gain DC-DC converter in the application occasion of wide input and output voltage. The invention introduces a 'coat circuit' corresponding to the traditional Zeta DC-DC converter, and provides a novel expandable Zeta DC-DC converter, which has the following advantages compared with the traditional Zeta DC-DC converter: the voltage regulation range of the input and output voltage is wide, the voltage stress of the switching device is low, and the like, and the voltage regulation device is suitable for application occasions with wide input or output voltage variation ranges.
The technical scheme adopted by the invention is as follows:
a novel scalable Zeta DC-DC converter, the converter comprising:
an input power source, a load R L A basic Zeta DC-DC converter, n basic units;
the basic Zeta DC-DC converter includes: two inductances L 1 、L 2 Two capacitors C 1 、C 2 A power switch S 1 One diode D 1 The method comprises the steps of carrying out a first treatment on the surface of the The connection form is as follows:
power switch S 1 The drain electrode of the power switch S is connected with the positive electrode of the input power supply 1 The source electrodes of (a) are respectively connected with the inductance L 1 One end of (C) capacitor 1 Capacitance C 1 Respectively with the other end of the inductor L 2 One end of diode D 1 Is connected with the cathode of the inductor L 2 And the other end of (C) and the capacitor C 2 Is connected to one end of (a)Sense of L 1 Is connected with the other end of diode D 1 Anode of (C), and capacitor C 2 The other ends of the two electrodes are connected with the negative electrode of the input power supply;
the components and internal connection forms of the n basic units are the same,
the 1 st base unit contains: inductance L 11 One diode D 11 Two capacitors C 11 、C 12 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, the capacitor C 11 Respectively with the other end of the inductor L 11 One end of diode D 11 Is connected with the cathode of the inductor L 11 And the other end of (C) and the capacitor C 12 Is connected with one end of the connecting rod;
the 2 nd base unit contains: inductance L 21 One diode D 21 Two capacitors C 21 、C 22 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, the capacitor C 21 Respectively with the other end of the inductor L 21 One end of diode D 21 Is connected with the cathode of the inductor L 21 And the other end of (C) and the capacitor C 22 Is connected with one end of the connecting rod;
.. analogize to the case of the i-th base unit, it contains: inductance L i1 One diode D i1 Two capacitors C i1 、C i2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, the capacitor C i1 Respectively with the other end of the inductor L i1 One end of diode D i1 Is connected with the cathode of the inductor L i1 And the other end of (C) and the capacitor C i2 Is connected with one end of the connecting rod;
the connection form between the individual base units is as follows: 1<i is less than or equal to n,
capacitor C in the 1 st basic cell 12 And inductance L 11 The intersection points connected with the other end of the capacitor C in the 2 nd basic unit 22 Another end of (D) and diode D 21 The anodes of which are connected to form an intersection point; capacitor C in the 1 st basic cell 11 One end of (2) and capacitor C in the 2 nd base unit 21 Is connected with one end of the connecting rod;
capacitor C in the 2 nd base unit 22 And inductance L 21 The intersection points connected with the other end of the capacitor C in the 3 rd basic unit 32 Is connected with the other end of diode D 31 The anodes of which are connected to form an intersection point; capacitor C in the 2 nd base unit 21 One end of (2) and the capacitor C in the 3 rd base unit 31 Is connected with one end of the connecting rod;
.. analogize, i-1 base cell capacitor C (i-1)2 And inductance L (i-1)1 The intersection points connected with the other end of the capacitor C in the ith basic unit i2 Is connected with the other end of diode D i1 The anodes of which are connected to form an intersection point; capacitor C in the i-1 th basic cell (i-1)1 Is connected with the capacitor C in the ith basic unit i1 Is connected with one end of the connecting rod;
the connection relationship between the 1 st basic unit and the basic Zeta DC-DC converter is as follows:
capacitor C in basic Zeta DC-DC converter 1 Is connected with the inductor L 1 One end of (2), and power switch S 1 The intersection of the source connections to the capacitor C in the 1 st basic cell 11 Is connected with one end of the connecting rod;
inductance L in basic Zeta DC-DC converter 2 And the other end of (C) and the capacitor C 2 Is connected to the diode D in the 1 st basic cell 11 Anode and capacitance C of (2) 12 The other ends of the two parts are connected to form an intersection point;
capacitor C in nth base unit n2 And inductance L n1 Is connected to the other end of the load R to form an intersection point L Is connected to one end of a load R L And the other end of the power supply is connected with the negative electrode of the input power supply.
The power switch S 1 The gate of which is connected to its controller and the duty cycle of which can vary from 0 to 1.
The invention relates to a novel expandable Zeta DC-DC converter, which has the following technical effects:
1. on the basis of improving the input and output gain of the converter, the voltage reducing capability of the converter is reserved, and the voltage stress of the switching device is low. Specifically, the following (inductance L) 1 When the current of (c) is continuously on):
input-output gainThe method comprises the following steps:
Figure GDA0004110740380000031
the voltage stress of the switching tube is as follows:
Figure GDA0004110740380000032
wherein D is the duty cycle, u in For input voltage u o To output voltage u s N is the base cell number for the power switch voltage stress.
2. The converter only comprises 1 power switch, and the control strategy and the driving circuit are simple.
3. The input and output gain of the converter and the voltage stress of the switching device can be adjusted by adjusting the number of the basic units. In addition, the control and drive circuit of the traditional Zeta DC-DC converter is not changed by the invention because the 'coat circuit' does not contain an active switch. Compared to a conventional Zeta-DC converter, the converter of the invention has: the voltage regulation range of the input and output voltage is wide, the voltage stress of the switching device is low, and the like, and the voltage regulation device is suitable for application occasions with wide input or output voltage variation ranges.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a circuit topology diagram of the present invention with a basic unit number of 2.
Fig. 3 is a schematic diagram of a conventional Zeta-DC converter circuit.
Fig. 4 is a graph showing the comparison of the input/output gain of the basic unit number of the present invention with that of the conventional Zeta-DC converter.
Fig. 5 is a waveform diagram of simulation of input voltage and output voltage when the number of basic cells is 2.
Fig. 6 is a simulated waveform diagram of the voltage across the switch and the duty cycle for a base unit number of 2 in accordance with the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The circuit topology of the present invention with a base unit number of 2 is shown in fig. 2:
a novel scalable Zeta DC-DC converter includes a DC input source, a load R L A basic Zeta DC-DC converter, two basic units. Wherein:
the basic Zeta DC-DC converter comprises two inductors L 1 、L 2 Two capacitors C 1 、C 2 A power switch S 1 One diode D 1 . The connection form is as follows: power switch S 1 The drain electrode of the power source is connected with the positive electrode of the input power source, and the source electrode is connected with the power inductance L 1 One end of (2) and capacitor C 1 Capacitance C 1 And the other end of (2) is connected with inductance L 2 One end of (D) and diode D 1 Is connected with the cathode of the inductor L 2 And the other end of (C) and the capacitor C 2 Is connected to one end of the inductor L 1 Is connected with the other end of diode D 1 Anode of (C) and capacitor C 2 The other end of the power supply is connected with the negative electrode of the input power supply.
The connection between the two base units is as follows:
capacitor C in the 1 st basic cell 12 And inductance L 11 The intersection point connected with the other end of the capacitor C in the 2 nd basic unit 22 Is connected to the other end of the diode D 21 Is connected to the anode of the first base unit to form a crossing point, and the capacitor C in the 1 st base unit 11 One end of (2) and capacitor C in the 2 nd base unit 21 Is connected to one end of the housing.
The connection relationship between the 1 st basic unit and the basic Zeta DC-DC converter is as follows:
capacitor C in basic Zeta DC-DC converter 1 Is connected with the inductor L 1 One end of (a) and a power switch S 1 The intersection of the source connections to the capacitor C in the 1 st basic cell 11 Is connected with one end of the connecting rod; inductance L in basic Zeta DC-DC converter 2 And the other end of (C) and the capacitor C 2 Is connected to diode D in the 1 st basic cell 11 Anode and capacitance C of (2) 12 Is connected at the other end to form an intersection point.
Load R L One end of (2)Capacitor C in the 2 nd base unit 22 And inductance L 21 Connected at the other end of the line, load R L And the other end of the power supply is connected with the negative electrode of the input power supply.
The power switch S 1 The gate of which is connected to its controller and the duty cycle of which can vary from 0 to 1.
At inductance L 1 When the current of the power switch is continuously conducted, the circuit can be divided into 2 working states according to different power switch states:
(1) Power switch S 1 Conduction, diode D 1 、D 11 、D 21 All turn off, at this time the inductor L 1 、L 2 、L 11 、L 21 Capacitance C 2 、C 12 、C 22 Charging, capacitor C 1 、C 11 、C 21 Discharging; inductance L 1 、L 2 、L 11 、L 21 The terminal voltage is shown as follows:
Figure GDA0004110740380000041
(2) Power switch S 1 Turn-off, diode D 1 、D 11 、D 21 All are conducted, at this time the inductance L 1 、L 2 、L 11 、L 21 Capacitance C 2 、C 12 、C 22 Discharging, capacitance C 1 、C 11 、C 21 Charging; inductance L 1 、L 2 、L 11 、L 21 The terminal voltage is shown as follows:
Figure GDA0004110740380000042
output voltage u o Is a capacitor C 2 、C 12 、C 22 Terminal voltage u of (2) c2 、u c12 、u c22 The sum is that:
u o ＝u c2 +u c12 +u c22 。
fig. 4 is a graph showing the comparison of the input/output gain of the basic unit number of the present invention with that of the conventional Zeta-DC converter. It can be seen from fig. 4 that the input/output gain of the proposed converter is greatly improved compared to a conventional Zeta converter.
FIG. 5 is a simulation waveform diagram of input voltage and output voltage when the basic unit number is 2, and specific simulation parameters are: input voltage u in =48v, duty cycle d=73.53%, load resistance R L =400 Ω. According to the input voltage and the duty ratio, when the number of the expansion units is calculated to be 2 according to theoretical analysis, the output voltage of the converter is about 400V. The simulation waveforms of the input and output voltages shown in fig. 5 are identical to the theoretical analysis, so that the correctness and feasibility of the theoretical analysis are verified.
Fig. 6 is a simulation waveform diagram of voltage and duty ratio at two ends of a switch when the number of basic units is 2, and specific simulation parameters are: input voltage u in =48v, duty cycle d=73.53%, load resistance R L =400 Ω. According to the input voltage and the duty ratio, the voltage stress of the switching tube can be calculated to be about 180V according to theoretical analysis. The switching tube voltage stress simulation shown in fig. 6 is consistent with theoretical analysis, and compared with the conventional Zeta converter, the switching tube voltage stress of the converter is significantly reduced.

Claims (2)

1. An expandable Zeta DC-DC converter, characterized in that the converter comprises:
an input power source, a load R L A basic Zeta DC-DC converter, n basic units;
the basic Zeta DC-DC converter includes: two inductances L 1 、L 2 Two capacitors C 1 、C 2 A power switch S 1 One diode D 1 The method comprises the steps of carrying out a first treatment on the surface of the The connection form is as follows:
power switch S 1 The drain electrode of the power switch S is connected with the positive electrode of the input power supply 1 The source electrodes of (a) are respectively connected with the inductance L 1 One end of (C) capacitor 1 Capacitance C 1 Respectively at the other ends of (a)And inductance L 2 One end of diode D 1 Is connected with the cathode of the inductor L 2 And the other end of (C) and the capacitor C 2 Is connected to one end of the inductor L 1 Is connected with the other end of diode D 1 Anode of (C), and capacitor C 2 The other ends of the two electrodes are connected with the negative electrode of the input power supply;
the components and internal connection forms of the n basic units are the same,
the 1 st base unit contains: inductance L 11 One diode D 11 Two capacitors C 11 、C 12 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, the capacitor C 11 Respectively with the other end of the inductor L 11 One end of diode D 11 Is connected with the cathode of the inductor L 11 And the other end of (C) and the capacitor C 12 Is connected with one end of the connecting rod;
the 2 nd base unit contains: inductance L 21 One diode D 21 Two capacitors C 21 、C 22 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, the capacitor C 21 Respectively with the other end of the inductor L 21 One end of diode D 21 Is connected with the cathode of the inductor L 21 And the other end of (C) and the capacitor C 22 Is connected with one end of the connecting rod;
.. analogize to the case of the i-th base unit, it contains: inductance L i1 One diode D i1 Two capacitors C i1 、C i2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, the capacitor C i1 Respectively with the other end of the inductor L i1 One end of diode D i1 Is connected with the cathode of the inductor L i1 And the other end of (C) and the capacitor C i2 Is connected with one end of the connecting rod;
the connection form between the individual base units is as follows: 1<i is less than or equal to n,
capacitor C in the 1 st basic cell 12 And inductance L 11 The intersection points connected with the other end of the capacitor C in the 2 nd basic unit 22 Another end of (D) and diode D 21 The anodes of which are connected to form an intersection point; capacitor C in the 1 st basic cell 11 One end of (2) and capacitor C in the 2 nd base unit 21 Is connected with one end of the connecting rod;
the 2 nd radicalCapacitance C in base unit 22 And inductance L 21 The intersection points connected with the other end of the capacitor C in the 3 rd basic unit 32 Is connected with the other end of diode D 31 The anodes of which are connected to form an intersection point; capacitor C in the 2 nd base unit 21 One end of (2) and the capacitor C in the 3 rd base unit 31 Is connected with one end of the connecting rod;
.. analogize, i-1 base cell capacitor C (i-1)2 And inductance L (i-1)1 The intersection points connected with the other end of the capacitor C in the ith basic unit i2 Is connected with the other end of diode D i1 The anodes of which are connected to form an intersection point; capacitor C in the i-1 th basic cell (i-1)1 Is connected with the capacitor C in the ith basic unit i1 Is connected with one end of the connecting rod;
the connection relationship between the 1 st basic unit and the basic Zeta DC-DC converter is as follows:
capacitor C in basic Zeta DC-DC converter 1 Is connected with the inductor L 1 One end of (2), and power switch S 1 The intersection of the source connections to the capacitor C in the 1 st basic cell 11 Is connected with one end of the connecting rod;
inductance L in basic Zeta DC-DC converter 2 And the other end of (C) and the capacitor C 2 Is connected to the diode D in the 1 st basic cell 11 Anode and capacitance C of (2) 12 The other ends of the two parts are connected to form an intersection point;
capacitor C in nth base unit n2 And inductance L n1 Is connected to the other end of the load R to form an intersection point L Is connected to one end of a load R L And the other end of the power supply is connected with the negative electrode of the input power supply.
2. An expandable Zeta DC-DC converter according to claim 1, characterized by: the power switch S 1 The gate of which is connected to its controller and the duty cycle of which can vary from 0 to 1.
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CN111786555B (en) * 2020-07-22 2021-11-02 福州大学 Zero-ripple high-gain DC-DC converter based on novel boosting unit
CN112737324B (en) * 2020-12-25 2022-02-01 三峡大学 Automatic voltage-sharing bipolar Zeta DC-DC converter
CN112701923B (en) * 2020-12-25 2022-02-01 三峡大学 High-gain Zeta DC-DC converter
CN112701943A (en) * 2020-12-29 2021-04-23 佛山科学技术学院 Photovoltaic inverter based on Zeta converter
CN112701911A (en) * 2020-12-29 2021-04-23 佛山科学技术学院 Combined direct current converter and topological circuit thereof
CN113890348A (en) * 2021-09-26 2022-01-04 三峡大学 Single-input high-reliability Zeta DC-DC converter
CN116317540A (en) * 2023-03-08 2023-06-23 广东工业大学 High gain ratio direct current converter based on multistage switch capacitor

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Application publication date: 20200724

Assignee: Hubei Yunzhihang Drone Technology Co.,Ltd.

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Denomination of invention: A Scalable Zeta DC-DC Converter

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Record date: 20231027