CN108512279B - High-precision charging power supply circuit and operation method thereof - Google Patents
High-precision charging power supply circuit and operation method thereof Download PDFInfo
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- CN108512279B CN108512279B CN201810397215.XA CN201810397215A CN108512279B CN 108512279 B CN108512279 B CN 108512279B CN 201810397215 A CN201810397215 A CN 201810397215A CN 108512279 B CN108512279 B CN 108512279B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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Abstract
The invention discloses a high-precision charging power supply circuit and an operation method thereof, belonging to the technical field of pulse power electronics.A direct current is input into an inversion switching tube, the inversion switching tube is provided with a first output end, a second output end and a third output end, the first output end is connected with a coarse charging resonance device, the second output end is connected with the input end of a boosting rectification circuit, the third output end is connected with a precise charging resonance device, the output ends of the coarse charging resonance device and the precise charging resonance device are connected with the input end of the boosting rectification circuit, the output end of the boosting rectification circuit is connected with a load capacitor C3, and two ends of C3 are connected with a sampling circuit in parallel. The invention aims to solve the technical problem of providing a high-precision charging power supply circuit and an operation method thereof.
Description
Technical Field
The invention belongs to the technical field of pulse power electronics, and particularly relates to a high-precision charging power supply circuit and an operation method thereof.
Background
In the field of pulse power electronics, the modulation of the pulse by the mains supply is mostly realized in the form of discharging the load by the stored energy of the capacitor. Such modulators are used to provide microwave energy to vacuum tubes (e.g., magnetrons, klystrons) for eventual electron acceleration. This technology was previously mainly based on military use, but nowadays accelerator systems with pulse modulators as the source of pulsed power are ubiquitous in our lives, such as radiotherapy, industrial irradiation, radiographic imaging, etc.
The precision of the discharging pulse current of the modulator mainly depends on the precision of a charging power supply, the existing LC resonance charging power supply adopts a more traditional charging mode, a bus inductor is formed by full-bridge rectification, and then the bus inductor is conducted alternately through a switch tube on the full bridge, and the inductor and capacitor resonance are used as a load for charging, and the precision of the charging power supply can only reach the level of 0.5% -1%. With the continuous expansion of the application neighborhood, the application requirements are also continuously improved, such as the high precision requirement of physical tests, the definition of detection imaging, the precise control of irradiation dose, and the like, and in order to promote the further development of such applications, the precision of the charging power supply must be improved to a higher level.
Disclosure of Invention
According to the defects of the prior art, the technical problem to be solved by the invention is to provide a high-precision charging power supply circuit and an operation method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a high accuracy charging power supply circuit, direct current inputs to the contravariant in with the switch tube, the contravariant switch tube is equipped with first output, second output and third output, thick resonance device that charges is connected to first output, boost rectifier circuit's input is connected to the second output, accurate resonance device that charges is connected to the third output, thick resonance device that charges and accurate resonance device's output of charging are connected to boost rectifier circuit's input, boost rectifier circuit's output is connected load capacitance C3, C3's both ends are parallelly connected have sampling circuit.
In the circuit, the coarse charging resonant device is formed by connecting a capacitor C1 and an inductor L1 in series. The accurate charging resonance device is formed by serially connecting a capacitor C2 and an inductor L2.
A method of operating a high accuracy charging power supply circuit, the method steps comprising:
step one, a reference generator generates a reference voltage, and the reference voltage is sent to a subtracter to form a rough charging reference voltage;
step two, the rough charging reference voltage and the sampling voltage are sent to a comparator N1; the reference voltage and the sampling voltage are sent to a voltage comparator N2;
step three, when the comparator N2 judges whether the sampling voltage reaches the reference voltage, if the sampling voltage reaches the reference voltage, the driving drive A and the driving drive B of the inverter are stopped to be output;
step four, in the comparator N1, when the sampling voltage does not reach the rough charging reference voltage, the comparator N1 outputs in a normal state, two paths of driving drivers A are sent to G1 and G4, and the drivers B are sent to G2 and G3, so that the inversion charging process of rough charging is realized; when the sampling voltage reaches the rough charging reference voltage, the comparator N1 is turned over to output, a switch in the control circuit is turned over, the output drive A of the driving generator is sent to G4 and G5, and the output drive B is sent to G6 and G3, so that the inversion charging process of accurate charging is realized;
and step five, the charging process in the step four is continued until the sampling voltage in the N2 reaches the reference voltage, the drive generator stops generating drive, and the charging process stops.
The invention has the beneficial effects that (1) two sets of LC resonance circuits are provided, wherein one set of the LC resonance circuits is coarsely charged through smaller resonance impedance and larger charging current so as to ensure the output capability of the charging power supply. The other set of LC resonant circuit has larger resonant impedance and is used for accurately charging the load capacitor after coarse charging. (2) A high-precision reference voltage and sampling circuit is provided, so that the precision of the reference voltage and the precision of the sampling voltage are greater than the precision of an output index. (3) And a control system is provided to realize the transition from voltage rough charging to precision charging and ensure that the wide-range voltage output meets the requirement of output precision.
Drawings
The contents of the drawings and the reference numerals in the drawings are briefly described as follows:
FIG. 1 is a schematic block diagram of a high precision charging power supply circuit of the present invention;
FIG. 2 is a schematic block diagram of the closed-loop control of the high-precision charging power supply circuit of the present invention;
in fig. 1, an inverter switching tube; 2. a coarsely charged resonant device; 3. accurately charging the resonant device; 4. a load capacitance; 5. a sampling device.
Detailed Description
The following description of the embodiments with reference to the drawings is provided to describe the embodiments of the present invention, and the embodiments of the present invention, such as the shapes and configurations of the components, the mutual positions and connection relationships of the components, the functions and working principles of the components, the manufacturing processes and the operation and use methods, etc., will be further described in detail to help those skilled in the art to more completely, accurately and deeply understand the inventive concept and technical solutions of the present invention.
The utility model provides a high accuracy charging power supply circuit, direct current inputs to the contravariant in with the switch tube combination, contravariant switch tube be equipped with three output, be first output respectively, second output and third output, thick resonance device that charges is connected to first output, the input 1 of rectifier circuit steps up is connected to the second output, accurate resonance device that charges is connected to the third output, thick resonance device that charges and accurate resonance device's that charges output are connected to rectifier circuit's input 2 that steps up, load capacitance C3 is connected to rectifier circuit's the output that steps up, C3's both ends are parallelly connected to have sampling circuit.
As shown in fig. 1, the coarse charging resonant device is formed by connecting L1 and C1 in series, which have smaller resonant impedance, and performs coarse charging on the load capacitor with a large charging current through the alternate conduction of V1 and V4, and V2 and V3; the accurate charging resonant device is formed by connecting a resonant device L2 with a resonant device C2 with a larger resonant impedance in series, and the load capacitor C3 is accurately charged through the alternate conduction of G3 and G6, and G4 and G5. Whether V1-V6 is conducted or not is determined by the driving of G1-G6. The two ends of the load capacitor C3 are connected in parallel with a sampling circuit, the sampling circuit completes the sampling of voltage by a resistance tap on the same resistor, and the sampling resistor is of an integrated structure, so that the sampling error caused by temperature drift can be reduced to the minimum.
An operation method suitable for a high-precision charging power supply circuit in the high-precision charging power supply circuit comprises the following specific contents: the reference is generated by a high precision reference voltage chip, i.e. a reference generator. As shown in fig. 2, the generated reference voltage is fed to a subtractor to subtract a partial voltage to form a coarse charge reference voltage, which is fed to a comparator N1 together with the sampled voltage.
The reference voltage and the sampling voltage are sent to a voltage comparator N2, the output of the N2 controls the output of the drive generator, and when the sampling value reaches the reference voltage, the drive A and the drive B of the inverter are stopped to achieve the precise closed-loop control of the circuit.
When the sampling value does not reach the rough charging reference voltage, the N1 comparator is output normally, two paths of driving drives A are sent to G1 and G4, and driving B are sent to G2 and G3, so that the inversion charging process of rough charging is realized; when the sampling value reaches the rough charging reference voltage, the comparator N1 inverts the output to invert the switch in the control circuit in FIG. 2, the output drive A of the drive generator is sent to G4 and G5, and the output drive B is sent to G6 and G3 to realize the inversion charging process of accurate charging, until the sampling value reaches the reference voltage, the drive generator stops generating drive, and the charging process stops.
According to the charging topological circuit and the control system, the charging capacity is ensured by using large-current charging, the charging time is relatively fixed by using small current, the charging precision of the power supply can be effectively improved through the verification of an actual power supply, and the unstable condition of power supply output caused by temperature drift can be solved through the characteristics of the sampling circuit.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification. The protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (2)
1. A high-precision charging power supply circuit is characterized in that direct current is input into an inverter switching tube, the inverter switching tube comprises a first switching tube G1, a second switching tube G2, a third switching tube G3, a fourth switching tube G4, a fifth switching tube G5 and a sixth switching tube G6, the first switching tube G1 and the second switching tube G2 are connected in series to form a first branch, the third switching tube G3 and the fourth switching tube G4 are connected in series to form a second branch, the fifth switching tube G5 and the sixth switching tube G6 are connected in series to form a third branch, the first branch, the second branch and the third branch are connected in parallel, the switching tubes G1-G6 are connected in anti-parallel with diodes respectively, a first diode V1, a second diode V2, a third diode V3, a fourth diode V4, a fifth diode V5 and a sixth diode V585 are arranged between the first switching tube G1 and the output end of the inverter switching tube G1, A second output end is arranged between the switching tubes G3 and G4, a third output end is arranged between the switching tubes G5 and G6, the first output end is connected with the rough charging resonance device, the second output end is connected with the input end of the boosting and rectifying circuit, the third output end is connected with the precise charging resonance device, the output ends of the rough charging resonance device and the precise charging resonance device are connected with the input end of the boosting and rectifying circuit, the output end of the boosting and rectifying circuit is connected with the load capacitor C3, and two ends of the load capacitor C3 are connected with a sampling circuit in parallel;
the coarse charging resonant device is formed by connecting a capacitor C1 and an inductor L1 in series;
the accurate charging resonant device is formed by serially connecting a capacitor C2 and an inductor L2, and accurately charges a load capacitor C3 by alternately conducting G3 and G6, and G4 and G5.
2. A method of operating a high accuracy charging power supply circuit as claimed in claim 1, characterized in that said method steps comprise:
step one, a reference generator generates a reference voltage, and the reference voltage is sent to a subtracter to form a rough charging reference voltage;
step two, the rough charging reference voltage and the sampling voltage are sent to a comparator N1; the reference voltage and the sampling voltage are sent to a voltage comparator N2;
step three, when the comparator N2 judges whether the sampling voltage reaches the reference voltage, if the sampling voltage reaches the reference voltage, the driving drive A and the driving drive B of the inverter are stopped to be output;
step four, in the comparator N1, when the sampling voltage does not reach the rough charging reference voltage, the comparator N1 outputs in a normal state, two paths of driving drivers A are sent to G1 and G4, and the drivers B are sent to G2 and G3, so that the inversion charging process of rough charging is realized; when the sampling voltage reaches the rough charging reference voltage, the comparator N1 is turned over to output, a switch in the control circuit is turned over, the output drive A of the driving generator is sent to G4 and G5, and the output drive B is sent to G6 and G3, so that the inversion charging process of accurate charging is realized;
and step five, the charging process in the step four is continued until the sampling voltage in the N2 reaches the reference voltage, the drive generator stops generating drive, and the charging process stops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810397215.XA CN108512279B (en) | 2018-04-28 | 2018-04-28 | High-precision charging power supply circuit and operation method thereof |
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| CN201810397215.XA CN108512279B (en) | 2018-04-28 | 2018-04-28 | High-precision charging power supply circuit and operation method thereof |
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| CN108512279A CN108512279A (en) | 2018-09-07 |
| CN108512279B true CN108512279B (en) | 2022-05-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202282744U (en) * | 2011-11-09 | 2012-06-20 | 上海理工大学 | High-power high-frequency high-voltage switch power supply |
| CN202435305U (en) * | 2011-12-16 | 2012-09-12 | 芜湖国睿兆伏电子股份有限公司 | Resonance drive circuit for improving capacitor charging precision |
| CN202872641U (en) * | 2012-07-16 | 2013-04-10 | 中国人民解放军军械工程学院 | Double bridge phase shift series-parallel resonance high-voltage direct-current power source |
| KR102009200B1 (en) * | 2016-07-04 | 2019-08-09 | 숭실대학교산학협력단 | Bidirectional Converter with Auxiliary LC Resonant Circuit and Operating Method thereof |
| CN206349917U (en) * | 2016-12-13 | 2017-07-21 | 深圳职业技术学院 | A kind of resonance circuit |
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Effective date of registration: 20230718 Address after: 241000 No.10 Ruifu Road, Longshan street, Wuhu Economic and Technological Development Zone, Anhui Province Patentee after: Wuhu maikewei Electromagnetic Technology Co.,Ltd. Address before: 241000 west side of Jiuhua North Road, Jiujiang Development Zone, Wuhu City, Anhui Province Patentee before: WUHU ZHONGDIAN ZHAOWEI ELECTRONIC Co.,Ltd. |