CN111446854A - Novel expandable Zeta DC-DC converter - Google Patents
Novel expandable Zeta DC-DC converter Download PDFInfo
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- CN111446854A CN111446854A CN202010364925.XA CN202010364925A CN111446854A CN 111446854 A CN111446854 A CN 111446854A CN 202010364925 A CN202010364925 A CN 202010364925A CN 111446854 A CN111446854 A CN 111446854A
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- 238000004088 simulation Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 1
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- 238000011217 control strategy Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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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
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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
- H02M3/06—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
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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
- H02M3/08—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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A novel scalable Zeta DC-DC converter comprising: an input power supply, a loadR LA basic Zeta DC-DC converter,na base unit; the basic Zeta DC-DC converter includes: two inductorsL 1、L 2Two capacitorsC 1、C 2A power switch S1A diode D1. Compared with the traditional Zeta DC-DC converter, the converter of the invention has the following advantages: the input and output voltage has the advantages of wide regulation range, low voltage stress of a switching device and the like, and is suitable for application occasions with wide input or output voltage variation range.
Description
Technical Field
The invention relates to a wide-input-output buck-boost DC/DC converter, in particular to a novel extensible ZetaDC-DC converter.
Background
In the literature, the key devices or schemes for improving the input and output gains of the DC-DC converter can be classified into an isolation type, a cascade type, a coupling inductance type, a switching capacitance type, a voltage gain unit type, or a combination of various types. However, most of the above schemes are developed based on the Boost converter, so that the scheme only has high Boost capability and does not have buck capability, and the input-output ratio of some schemes needs to be larger than 2. Therefore, the above scheme is difficult to be applied to some occasions where the voltage variation range is large, especially occasions where voltage reduction is needed.
The traditional non-isolated Buck-Boost DC-DC converter comprises a Buck-Boost circuit, a Cuk circuit, a SEPIC circuit and a Zeta circuit. Theoretically, by adjusting the duty ratio D, the input-output gain of these converters can be varied 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 work in a 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 the circuit and the components, and the adjustment range of the input-output gain ratio is greatly limited. Therefore, on the basis of the existing buck-boost DC-DC converter, the research on the novel wide-input-output buck-boost DC/DC converter which can realize high-gain boost and simultaneously reserve the buck capacity is of great significance.
Disclosure of Invention
The non-isolated high-gain DC-DC converter aims to solve the problem of limitation of the existing non-isolated high-gain DC-DC converter in wide input and output voltage application occasions. The invention introduces a 'coat circuit' adapted to the traditional Zeta DC-DC converter, and provides a novel extensible Zeta DC-DC converter, compared with the traditional Zeta DC-DC converter, the converter of the invention comprises: the input and output voltage has the advantages of wide regulation range, low voltage stress of a switching device and the like, and is suitable for application occasions with wide input or output voltage variation range.
The technical scheme adopted by the invention is as follows:
a novel scalable Zeta DC-DC converter comprising:
an input power supply, a load RLA basic Zeta DC-DC converter, n basic units;
the basic Zeta DC-DC converter includes:two inductors L1、L2Two capacitors C1、C2A power switch S1A diode D1(ii) a The connection form is as follows:
power switch S1Is connected with the positive pole of the input power supply, and a power switch S1Are respectively connected with an inductor L1One terminal of (1), a capacitor C1One terminal of (C), a capacitor1Respectively connected with the inductor L2One terminal of (1), diode D1Is connected to the cathode of the inductor L2Another terminal of (1) and a capacitor C2Is connected to one end of an inductor L1Another terminal of (1), diode D1And a capacitor C2The other ends of the two-phase current transformer are connected with the negative electrode of the input power supply;
the components and the internal connection forms of the n basic units are the same,
the 1 st basic unit comprises an inductor L11A diode D11Two capacitors C11、C12(ii) a Wherein, the capacitor C11Respectively connected with the inductor L11One terminal of (1), diode D11Is connected to the cathode of the inductor L11Another terminal of (1) and a capacitor C12One end of the two ends are connected;
the 2 nd basic unit comprises an inductor L21A diode D21Two capacitors C21、C22(ii) a Wherein, the capacitor C21Respectively connected with the inductor L21One terminal of (1), diode D21Is connected to the cathode of the inductor L21Another terminal of (1) and a capacitor C22One end of the two ends are connected;
.... analogized, taking the i-th basic unit as an example, it contains an inductor Li1A diode Di1Two capacitors Ci1、Ci2(ii) a Wherein, the capacitor Ci1Respectively connected with the inductor Li1One terminal of (1), diode Di1Is connected to the cathode of the inductor Li1Another terminal of (1) and a capacitor Ci2One end of the two ends are connected;
the connection form between each basic unit is as follows: 1< i is less than or equal to n,
capacitor C in the 1 st basic cell12And inductor L11The other end of the first and second electrodes are connected with the capacitor C in the 2 nd basic unit22And a diode D21The anodes of the anode groups are connected to form an intersection point; capacitor C in the 1 st basic cell11And the 2 nd basic unit middle capacitor C21One end of the two ends are connected;
capacitance C in 2 nd basic unit22And inductor L21The other end of the first and second electrodes are connected with the capacitor C in the 3 rd basic unit32Another terminal of (1), diode D31The anodes of the anode groups are connected to form an intersection point; capacitance C in 2 nd basic unit21And a capacitor C in the 3 rd basic unit31One end of the two ends are connected;
.... analogized, capacitance C in the i-1 st base unit(i-1)2And inductor L(i-1)1The other end of the first and second electrodes are connected with the capacitor C in the ith basic uniti2Another terminal of (1), diode Di1The anodes of the anode groups are connected to form an intersection point; capacitance C in the i-1 th basic unit(i-1)1And the capacitor C in the ith basic uniti1One end of the two ends are connected;
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 converter1And inductor L1And a power switch S1And the intersection point of the source electrode connection with the capacitor C in the 1 st basic unit11One end of the two ends are connected;
inductor L in basic Zeta DC-DC converter2Another terminal of (1) and a capacitor C2And a cross point connected to one end of the diode D in the 1 st basic unit11Anode and capacitor C12The other ends of the two are connected to form an intersection point;
capacitor C in nth basic unitn2And inductor Ln1Is connected to form an intersection point with the load RLAre connected at one end to a load RLThe other end of the first switch is connected with the negative pole of the input power supply.
The power switch S1The gate of (a) is connected to its controller, and its duty cycle can be varied between 0 and 1.
The invention discloses a novel extensible Zeta DC-DC converter, which has the following technical effects:
1. the step-down capability of the converter is reserved on the basis of improving the input and output gains of the converter, and the voltage stress of the switching device is low (the inductor L)1When the current of (2) is continuously on):
the voltage stress of the switching tube is as follows:wherein D is the duty cycle, uinIs an input voltage uoTo output a voltage usFor power switch voltage stress, n is the base unit number.
2. The converter only comprises 1 power switch, and the control strategy and the driving circuit are simple.
3. The input and output gains 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 driving circuits of the traditional Zeta DC-DC converter are not changed by the invention because the 'coat circuit' does not contain an active switch. Compared with the traditional Zeta DC-DC converter, the converter of the invention has the following advantages: the input and output voltage has the advantages of wide regulation range, low voltage stress of a switching device and the like, and is suitable for application occasions with wide input or output voltage variation range.
Drawings
Fig. 1 is a schematic diagram of the circuit of the present invention.
Fig. 2 is a circuit topology diagram of the present invention with a base cell number of 2.
Fig. 3 is a schematic diagram of a conventional Zeta DC-DC converter circuit.
Fig. 4 is a graph comparing the input/output gain of the present invention when the number of basic units is 2 with the input/output gain of the conventional Zeta DC-DC converter.
FIG. 5 is a waveform diagram of the input voltage and output voltage simulation for a basic cell number of 2 according to the present invention.
Fig. 6 is a simulated waveform diagram of the terminal voltage and duty ratio of the switch when the number of basic units is 2.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 2 shows a circuit topology diagram of the present invention with 2 basic units:
a novel extensible Zeta DC-DC converter comprises a DC input source and a load RLA basic Zeta DC-DC converter, two basic units. Wherein:
the basic Zeta DC-DC converter comprises two inductors L1、L2Two capacitors C1、C2A power switch S1A diode D1. The connection form is as follows: power switch S1Has a drain connected to the positive electrode of the input power supply and a source connected to the power inductor L1One terminal of and a capacitor C1One terminal of (C), a capacitor1Another end of (a) and an inductor L2And a diode D1Is connected to the cathode of the inductor L2Another terminal of (1) and a capacitor C2Is connected to one end of an inductor L1Another terminal of (1), diode D1Anode and capacitor C2And the other end of the second switch is connected with the negative electrode of the input power supply.
The form of the connection between the two base units is as follows:
capacitor C in the 1 st basic cell12And inductor L11And the intersection point of the other end of the second base unit and the capacitor C in the 2 nd base unit22And the other end of the diode D21Are connected to form a point of intersection, the capacitor C in the 1 st basic unit11And the 2 nd basic unit middle capacitor C21Are connected at one end.
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 converter1And inductor L1And a power switch S1And the intersection point of the source electrode connection with the capacitor C in the 1 st basic unit11One end of which is connected with an inductor L in the basic Zeta DC-DC converter2Another terminal of (1) and a capacitor C2And an intersection of one end of the first base unit and the diode D in the 1 st base unit11Anode and capacitor C12The other ends of the two are connected to form a crossing point.
Load RLAnd the 2 nd basic unit middle capacitor C22And inductor L21Are connected at the other end of the load RLThe other end of the first switch is connected with the negative pole of the input power supply.
The power switch S1The gate of (a) is connected to its controller, and its duty cycle can be varied between 0 and 1.
At inductor L1When the current is continuously conducted, the circuit can be divided into 2 working states according to different power switch states:
(1) power switch S1Conducting, diode D1、D11、D21Are all turned off, and the inductor L at the moment1、L2、L11、L21Capacitor C2、C12、C22Charging, capacitance C1、C11、C21Discharge inductor L1、L2、L11、L21The terminal voltage is shown as follows:
(2) power switch S1Turn-off, diode D1、D11、D21Are all turned on, and the inductor L is at the moment1、L2、L11、L21Capacitor C2、C12、C22Discharge, capacitance C1、C11、C21Charging inductor L1、L2、L11、L21The terminal voltage is shown as follows:
output voltage uoIs a capacitor C2、C12、C22Terminal voltage u ofc2、uc12、uc22And (c) the sum, i.e.:
uo=uc2+uc12+uc22。
fig. 4 is a graph comparing the input/output gain of the present invention when the number of basic units is 2 with the input/output gain of the conventional Zeta DC-DC converter. It can be seen from fig. 4 that the input-output gain of the proposed converter is greatly improved compared to the conventional Zeta converter.
Fig. 5 is a simulation waveform diagram of the input voltage and the output voltage when the number of basic units is 2, and the specific simulation parameters are as follows: input voltage uin48V, 73.53% duty ratio D, and load resistance RL400 Ω. According to the input voltage and the duty ratio, when the number of the extension units is 2, the output voltage of the converter is about 400V according to theoretical analysis and calculation. The input and output voltage simulation waveform shown in fig. 5 is matched with theoretical analysis, so that the correctness and feasibility of the theoretical analysis are verified.
Fig. 6 is a simulation waveform diagram of the terminal voltage and duty ratio at both ends of the switch when the number of basic units is 2, and the specific simulation parameters are as follows: input voltage uin48V, 73.53% duty ratio D, and load resistance RL400 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 simulation of the voltage stress of the switching tube shown in fig. 6 is identical to the theoretical analysis, and compared with the conventional Zeta converter, the voltage stress of the switching tube of the converter is obviously reduced.
Claims (2)
1. A novel scalable Zeta DC-DC converter, characterized in that it comprises:
an input power supply, a load RLA basic Zeta DC-DC converter, n basic units;
the basic Zeta DC-DC converter comprises two inductors L1、L2Two capacitors C1、C2A power switch S1A diode D1(ii) a The connection form is as follows:
power switch S1Is connected with the positive pole of the input power supply, and a power switch S1Are respectively connected with an inductor L1One terminal of (1), a capacitor C1One terminal of (C), a capacitor1Respectively connected with the inductor L2One terminal of (1), diode D1Is connected to the cathode of the inductor L2Another terminal of (1) and a capacitor C2Is connected to one end of an inductor L1Another terminal of (1), diode D1And a capacitor C2The other ends of the two-phase current transformer are connected with the negative electrode of the input power supply;
the components and the internal connection forms of the n basic units are the same,
the 1 st basic unit comprises an inductor L11A diode D11Two capacitors C11、C12(ii) a Wherein, the capacitor C11Respectively connected with the inductor L11One terminal of (1), diode D11Is connected to the cathode of the inductor L11Another terminal of (1) and a capacitor C12One end of the two ends are connected;
the 2 nd basic unit comprises an inductor L21A diode D21Two capacitors C21、C22(ii) a Wherein, the capacitor C21Respectively connected with the inductor L21One terminal of (1), diode D21Is connected to the cathode of the inductor L21Another terminal of (1) and a capacitor C22One end of the two ends are connected;
.... analogized, taking the i-th basic unit as an example, it contains an inductor Li1A diode Di1Two capacitors Ci1、Ci2(ii) a Wherein, the capacitor Ci1Respectively connected with the inductor Li1One terminal of (1), diode Di1Is connected to the cathode of the inductor Li1Another terminal of (1) and a capacitor Ci2One end of the two ends are connected;
the connection form between each basic unit is as follows: 1< i is less than or equal to n,
capacitor C in the 1 st basic cell12And inductor L11The other end of the first and second electrodes are connected with the capacitor C in the 2 nd basic unit22And a diode D21The anodes of the anode groups are connected to form an intersection point; capacitor C in the 1 st basic cell11And the 2 nd basic unit middle capacitor C21One end of the two ends are connected;
capacitance C in 2 nd basic unit22And inductor L21The other end of the first and second electrodes are connected with the capacitor C in the 3 rd basic unit32Another terminal of (1), diode D31The anodes of the anode groups are connected to form an intersection point; capacitance C in 2 nd basic unit21And a capacitor C in the 3 rd basic unit31One end of the two ends are connected;
.... analogized, capacitance C in the i-1 st base unit(i-1)2And inductor L(i-1)1The other end of the first and second electrodes are connected with the capacitor C in the ith basic uniti2Another terminal of (1), diode Di1The anodes of the anode groups are connected to form an intersection point; capacitance C in the i-1 th basic unit(i-1)1And the capacitor C in the ith basic uniti1One end of the two ends are connected;
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 converter1And inductor L1And a power switch S1And the intersection point of the source electrode connection with the capacitor C in the 1 st basic unit11One end of the two ends are connected;
inductor L in basic Zeta DC-DC converter2Another terminal of (1) and a capacitor C2And a cross point connected to one end of the diode D in the 1 st basic unit11Anode and capacitor C12The other ends of the two are connected to form an intersection point;
capacitor C in nth basic unitn2And inductor Ln1Is connected to form an intersection point with the load RLAre connected at one end to a load RLThe other end of the first switch is connected with the negative pole of the input power supply.
2. The novel scalable Zeta DC-DC converter of claim 1, characterized by: the power switch S1The gate of (a) is connected to its controller, and its duty cycle can be varied between 0 and 1.
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111786555A (en) * | 2020-07-22 | 2020-10-16 | 福州大学 | Zero-ripple high-gain DC-DC converter based on novel boosting unit |
CN112701911A (en) * | 2020-12-29 | 2021-04-23 | 佛山科学技术学院 | Combined direct current converter and topological circuit thereof |
CN112701923A (en) * | 2020-12-25 | 2021-04-23 | 三峡大学 | Novel 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 |
CN112737324A (en) * | 2020-12-25 | 2021-04-30 | 三峡大学 | Automatic voltage-sharing bipolar 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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CN109274267A (en) * | 2018-11-21 | 2019-01-25 | 三峡大学 | A kind of novel expansible Zeta DC-DC converter |
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CN104201927A (en) * | 2014-09-23 | 2014-12-10 | 青岛理工大学 | Single-stage coupling inductance ZETA reactance source inverter |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111786555A (en) * | 2020-07-22 | 2020-10-16 | 福州大学 | Zero-ripple high-gain DC-DC converter based on novel boosting unit |
CN111786555B (en) * | 2020-07-22 | 2021-11-02 | 福州大学 | Zero-ripple high-gain DC-DC converter based on novel boosting unit |
CN112701923A (en) * | 2020-12-25 | 2021-04-23 | 三峡大学 | Novel high-gain Zeta DC-DC converter |
CN112737324A (en) * | 2020-12-25 | 2021-04-30 | 三峡大学 | Automatic voltage-sharing bipolar Zeta DC-DC 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 |
CN112701943A (en) * | 2020-12-29 | 2021-04-23 | 佛山科学技术学院 | Photovoltaic inverter based on Zeta 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. Assignor: CHINA THREE GORGES University Contract record no.: X2023980044730 Denomination of invention: A Scalable Zeta DC-DC Converter Granted publication date: 20230502 License type: Common License Record date: 20231027 |
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