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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 17. Отображено 17.
19-03-2014 дата публикации

Single-tube soft-switching BUCK converter

Номер: CN103647452A
Автор: BI CHUANG, HU JINGANG, XIANG YONG, LU HUA
Принадлежит:

The invention, which belongs to the field of the electronic technology, relates to a single-tube soft-switching BUCK converter. A coupling transformer and a resonant capacitor are used for forming a soft-switching auxiliary circuit of a BUCK main switching tube. The coupling transformer has the one-to-one design and primary and secondary inductance values are Lr; the primary unit of the coupling transformer is connected in series to a BUCK main loop and the dotted terminal serves as a current flowing in direction; and a secondary non-dotted terminal of the coupling transformer is connected with a positive terminal of an output filter capacitor by a fast recovery diode; and a secondary dotted terminal of the coupling transformer is grounded. And the resonant capacitor Cr is connected in parallel to the two ends of a fly-wheel diode. According to the invention, objectives of zero-current conduction and zero-voltage turning off can be achieved. Compared with the traditional soft-switching ...

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Номер записи: 1
29-08-2023 дата публикации

Broadband impedance model for analyzing LLC resonant converter and modeling method

Номер: CN116663466A
Автор: BI CHUANG, LUO SIYONG, TANG AIHUAN
Принадлежит:

The invention belongs to the technical field of power electronics, and discloses a broadband impedance model for analyzing an LLC resonant converter and a modeling method, and the broadband impedance model comprises a full-bridge LLC resonant converter common-mode broadband model. The device is composed of a transmission wire, a bonding pad, a binding post, a PCB copper wire, a resonant cavity, a transformer, a PCB wire ground stray capacitor and a semiconductor switch tube MOSFET ground stray capacitor high-frequency model. The full-bridge LLC resonant converter differential-mode broadband model is composed of a transmission wire, a bonding pad, a binding post, a PCB copper wire, a resonant cavity, a transformer, a PCB wire ground parasitic capacitor, a semiconductor switch tube MOSFET and an input capacitor high-frequency model. The method has universality and universality, different switching power supply circuit structures have a certain difference, but the modeling method provided ...

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Номер записи: 2
18-04-2023 дата публикации

GIS partial discharge light detection and positioning simulation method and system, medium and terminal

Номер: CN115980520A
Автор: BI CHUANG, CHEN MIN, ZHONG QISHUI, BAI JINPING
Принадлежит:

The invention belongs to the technical field of GIS equipment simulation, and discloses a GIS partial discharge light detection and positioning simulation method and system, a medium and a terminal.The GIS actual shape is decomposed, the most typical part of a T-shaped corner GIS is selected, and Tracepro software is used for modeling; a detection surface and a partial discharge source are arranged in the T-shaped GIS model; and simulation is carried out in Tracepro to obtain a total luminous flux distribution diagram on each detection surface, and the total luminous flux distribution diagram is substituted into a formula to calculate the optical radiance. By establishing the function relationship between the irradiance value of the corresponding detection position and the position of the partial discharge source, when the irradiance of the detector position is obtained, the position of the partial discharge source can be reversely calculated. The method has the key advantages that actual ...

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Номер записи: 3
14-04-2023 дата публикации

Multi-scroll chaotic circuit

Номер: CN115967482A
Автор: BI CHUANG, BAI JINPING, CHEN MIN, ZHONG QISHUI
Принадлежит:

The invention belongs to the technical field of electronic circuits, and discloses a multi-scroll chaotic circuit, the number of integrating circuits is three, each integrating circuit is in linear connection with an adder circuit, the number of summing circuits is two, the summing circuits are a multiplier summing circuit and a controlled voltage source circuit, the integrating circuits are connected with one another, and the summing circuits are connected with the controlled voltage source circuit. The integrating circuit comprises a first integrating circuit, a second integrating circuit and a third integrating circuit from top to bottom. The first integrating circuit is provided with a voltage source VS1, the positive electrode of the voltage source VS1 is connected with one end of an R8, the reverse input end of an adder U3 and one end of an R6 through an R7, the other end of the R6 is connected with the output end of a K1, and the output end of the adder U3 and the other end of the ...

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Номер записи: 4
30-07-2014 дата публикации

Asymmetric frequency modulation method for full-bridge inverter circuit

Номер: CN103956931A
Автор: XIANG YONG, BI CHUANG, HU JINGANG, HOU PENG
Принадлежит:

The invention relates to electronic circuit technologies, in particular to an asymmetric frequency modulation method for a full-bridge inverter circuit. According to the asymmetric frequency modulation method for the full-bridge inverter circuit, a reverse conducting type IGBT switching tube S1, a reverse conducting type IGBT switching tube S2, a reverse conducting type IGBT switching tube S3 and a reverse conducting type IGBT switching tube S4 are used for forming the full-bridge inverter circuit, the S1 and the S2 are connected to form a left bridge arm, the S3 and the S4 are connected to form a right bridge arm, and the left bridge arm is connected with the right bridge arm through an inductor L, a resistor R and a capacitor C in sequence; the full-bridge inverter circuit using the asymmetric frequency modulation method is used for outputting power equal to or smaller than 25%. The asymmetric frequency modulation method for the full-bridge inverter circuit has the advantages that the ...

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Номер записи: 5
13-08-2014 дата публикации

Z-source inverter circuit

Номер: CN103986362A
Автор: BI CHUANG, XIANG YONG, HOU PENG, HU JINGANG
Принадлежит:

The invention relates to the electronic circuit technology, in particular to a Z-source inverter circuit. The Z-source inverter circuit comprises a Z-source network and a single phase inverter circuit. The Z-source inverter circuit is characterized in that the Z-source network is composed of a diode D1, a diode D2, an inductor L1, an inductor L2, a capacitor C1, a capacitor C2, an IGBT transistor S1, an IGBT transistor S2, an IGBT transistor S3 and an IGBT transistor S4. The drain electrode of the S1 is connected with the positive electrode of a power source E, and the source electrode of the S1 is connected with the negative electrode of the diode D1. The source electrode of the S1 passes through the inductor L1 and then is connected with the drain electrode of the S2. The source electrode of the S1 sequentially passes through the inductor L1, the diode D2 and the capacitor C2 and then is connected with the drain electrode of the S3 and the drain electrode of the S4. The positive electrode ...

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Номер записи: 6
07-04-2023 дата публикации

Non-parallel bonding wire parasitic parameter extraction model and transmission characteristic optimization method thereof

Номер: CN115935882A
Автор: BI CHUANG, YI LEI
Принадлежит:

The invention belongs to the technical field of microwave radio frequency, and discloses a non-parallel bonding wire parasitic parameter extraction model and a transmission characteristic optimization method thereof, and the non-parallel bonding wire parasitic parameter extraction model is used for extracting parasitic parameters of a bonding wire; the method comprises the following steps of: establishing a bonding wire equivalent circuit model in Advanced Design System software, and designing by using a Smith chart to obtain a micro-strip single-branch matching circuit suitable for the bonding wire; after microstrip single-branch matching circuit parameters are converted into actual microstrip lines, a microstrip matching structure is obtained based on parasitic parameter extraction model design, and model transmission characteristic optimization is achieved. According to the non-parallel bonding wire parasitic parameter extraction model, various parasitic parameters of the bonding wire ...

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Номер записи: 7
23-06-2023 дата публикации

CM-EMI modeling method based on silicon carbide power converter system and system and equipment thereof

Номер: CN116306438A
Автор: REN QIANG, BI CHUANG, ZHANG YUSHENG, SHAN HEYANG, XU HAODONG, CHEN JIEYU, CHEN YICONG, HUANG ZIKUN, WAN QING, XU LEI, LI JUN, LEI YU
Принадлежит:

The invention discloses a CM-EMI modeling method based on a silicon carbide power converter system, and a system and equipment thereof. The method comprises the following steps: S1, defining an EMI noise source and analyzing a CM conduction path; s2, carrying out equivalence on the EMI noise source and the noise conduction path, and obtaining a common-mode current solving formula based on the CM-EMI model of the silicon carbide power converter system; s3, accessing two groups of impedances to the CM-EMI model based on the silicon carbide power converter system to respectively obtain an equivalent circuit model I and an equivalent circuit model II; s4, building a test platform for conducting EMI (Electro-Magnetic Interference) to obtain a common-mode current predicted value; and S5, comparing the common-mode current test value with the common-mode current prediction value, if the common-mode current test value is consistent with the common-mode current prediction value, determining that ...

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Номер записи: 8
27-08-2014 дата публикации

Feedback circuit for current feedback type DC-DC converter

Номер: CN104009626A
Автор: XIANG YONG, BI CHUANG, ZHOU WEIWEI, ZHANG YUQIAN, FAN ZHENGHANG, ZHANG QIAN
Принадлежит:

The invention relates to an electronic circuit technology, in particular to a feedback circuit for a current feedback type DC-DC converter. The feedback circuit for the current feedback type DC-DC converter is characterized by comprising a first comparator COMP1, a second comparator COMP2, a subtractor and an RS trigger, the positive input end of the first comparator COMP1 is connected with feedback currents, the negative phase input end of the first comparator COMP1 is connected with first reference currents Iref1, the output end of the first comparator COMP1 is connected with the R end of the RS trigger, the positive input end of the subtractor is connected with the first reference currents Iref1, the negative input end of the subtractor is connected with second reference currents Iref1, the positive input end of the second comparator COMP2 is connected with the output end of the subtractor, the negative phase input end of the second comparator COMP2 is connected with the feedback currents ...

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Номер записи: 9
12-03-2014 дата публикации

IGBT (insulated gate bipolar transistor) parallel current sharing circuit

Номер: CN103633820A
Автор: BI CHUANG, HOU PENG, XIANG YONG, LU HUA
Принадлежит:

The invention aims to provide an IGBT (insulated gate bipolar transistor) parallel current sharing circuit, and solves the problem that current sharing is not balanced due to asynchrony of driving signals of an IGBT parallel circuit. According to the main technical scheme, the IGBT parallel current sharing circuit comprises N parallel IGBT modules, an RCD absorbing circuit and a load; the RCD absorbing circuit is connected two ends of the IGBT modules in parallel; a power supply is connected with the IGBT modules by virtue of the load; IGBT grids of the parallel IGBT modules are short-circuited; the RCD absorbing circuit comprises diodes, resistors and capacitors; the resistors are connected to two ends of the diodes in parallel; the capacitors are connected to cathodes of the diodes in series; two ends of the capacitors are connected with a capacitor discharge loop in parallel. According to the circuit, the current sharing of the IGBT parallel circuit is realized, the work reliability ...

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Номер записи: 10
06-08-2014 дата публикации

Frequency multiplication induction heating power supply based on full bridge inversion circuit

Номер: CN103974478A
Автор: BI CHUANG, XIANG YONG, HU JIN'GANG, LI YAJUN
Принадлежит:

The invention relates to an electronic circuit technology, in particular to a frequency multiplication induction heating power supply based on full bridge inversion topology. The frequency multiplication induction heating power supply comprises a full bridge inversion circuit, a load matching transformer and separated resonance capacitors. The full bridge inversion circuit is composed of a reverse conduction IGBT switching tube SIU, a reverse conduction IGBT switching tube S1D, a reverse conduction IGBT switching tube S2U and a reverse conduction IGBT switching tube S2D. The full bridge inversion circuit is connected with a power voltage Vd. The S1U and the S1D are connected to form a left bridge arm, and the S2U and the S2D are connected to form a right bridge arm. The transformer comprises two primary coils, the numbers of turns of the two primary coils are Np1 and Np2 respectively, the Np1 is equal to the Np2, and dotted terminals of the Np1 and the Np2 are connected with the midpoint ...

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Номер записи: 11
30-07-2014 дата публикации

Frequency modulation method for full-bridge inverter circuit

Номер: CN103956930A
Автор: BI CHUANG, XIANG YONG, HU JINGANG, LI YAJUN
Принадлежит:

The invention relates to electronic circuit technologies, in particular to a frequency modulation method for a full-bridge inverter circuit. According to the frequency modulation method for the full-bridge inverter circuit, a reverse conducting type IGBT switching tube S1, a reverse conducting type IGBT switching tube S2, a reverse conducting type IGBT switching tube S3 and a reverse conducting type IGBT switching tube S4 are used for forming the full-bridge inverter circuit, a full-bridge modulation mode is adopted when the output power of the full-bridge inverter circuit ranges from 56% to 100%, an asymmetric frequency modulation mode is adopted when the output power of the full-bridge inverter circuit ranges from 25% to 56%, a half-bridge modulation mode is adopted when the output power of the full-bridge inverter circuit is smaller than 25%. The frequency modulation method for the full-bridge inverter circuit has the advantages that through a segmented power modulation mode, the power ...

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Номер записи: 12
19-03-2014 дата публикации

Step wave based multiple scroll wave circuit

Номер: CN103647635A
Автор: BI CHUANG, ZHANG QIAN, XIANG YONG, FAN ZHENGHANG
Принадлежит:

The invention discloses a step wave based multiple scroll wave circuit. The step wave based multiple scroll wave circuit comprises a step wave sequence generation circuit and a scroll wave signal output circuit; the number of scroll waves can be controlled by the change of the number of steps of step waves; the step wave sequence generation circuit comprises a direct current power supply and a step wave signal source; the scroll wave signal output circuit comprises an adder, a first integrator, a second integrator, a multiplier, a reverser, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1 and a second capacitor C2. Compared with the traditional chaotic scroll wave signals, signals of the step wave based multiple scroll wave circuit are good in certainty and uniqueness and the step wave based multiple scroll wave circuit is simple in circuit structure ...

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Номер записи: 13
30-05-2023 дата публикации

Method, system and equipment for generating logistic distribution random number

Номер: CN116192357A
Автор: BI CHUANG, ZHONG QISHUI, CHEN MIN, BAI JINPING
Принадлежит:

The invention belongs to the technical field of cryptology security, and discloses a method, a system and equipment for generating a logistic distribution random number, and the method for generating the logistic distribution random number comprises the following steps: setting related parameter variables in a nonlinear system, and carrying out iterative calculation on an initial value state of the system by utilizing a sampled nonlinear equation to obtain a logistic distribution random number; discrete data of system state variables are obtained; and based on the discrete data of the system state variable in combination with two new discrete variables, controlling the system to simultaneously generate two random numbers meeting Logistic distribution. The nonlinear system equation adopted by the method is simple in structure, and two random numbers meeting logistic fractions can be generated at the same time and have the same mathematical expectation value as the random numbers. The distribution ...

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Номер записи: 14
16-04-2014 дата публикации

Charge state estimation method based on initial value optimization

Номер: CN103728567A
Автор: XIANG YONG, FAN ZHENGHANG, BI CHUANG, XIANG JUNJIE
Принадлежит:

The invention belongs to the technical field of automobile power batteries, and particularly relates to an SOC estimation method of an automobile power battery. Charging and discharging are conducted on the battery over and over again, then standing is performed, the voltage value of the battery in the process from charging and discharging to standing is detected, stable voltage time t(off) is recorded, and an initial value SOC(t0+delta t) is obtained. The battery is used within recovery time, a precise SOC initial value can be provided for the battery, and thus the SOC value estimated by expanding a Kalman filtering method can be converged more quickly.

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Номер записи: 15
27-06-2023 дата публикации

Impedance matching optimization method, system and equipment for integrated circuit power supply

Номер: CN116341456A
Автор: HUANG ZIKUN, BI CHUANG, LIU JIAOJIAN, DAI BO, CHEN YICONG, ZHANG YUSHENG, XU HAODONG, REN QIANG, WAN QING, CHEN JIEYU, XU LEI, LI JUN
Принадлежит:

The invention discloses an impedance matching optimization method, system and device for an integrated circuit power supply, and the method comprises the following steps: S1, carrying out the combination of a decoupling capacitor and a port of which the power impedance needs to be optimized in a chip, and obtaining different initial port decoupling capacitor combination schemes; setting target impedance according to the working voltage of the chip; the impedance value of the power supply is calculated by using the voltage received by the chip and the flowing current; s2, obtaining a candidate port decoupling capacitor combination scheme by using a genetic algorithm; and S3, applying the candidate port decoupling capacitor combination scheme to the chip to calculate a new power supply impedance value, if the new power supply impedance value is less than or equal to the target impedance, obtaining an optimal decoupling capacitor combination scheme, otherwise, returning to the steps S2-S3 ...

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Номер записи: 16
19-03-2014 дата публикации

Drive device of electric automobile

Номер: CN103640489A
Автор: XIANG YONG, XIANG JUNJIE, BI CHUANG, ZHANG QIAN
Принадлежит:

The invention relates to the technology of electric automobiles, in particular to a drive device of an electric automobile. The drive device of the electric automobile comprises a battery pack, a motor drive circuit and an electric motor, and is characterized by further comprising a Z source converter, wherein the Z source converter is connected with the battery pack and the motor drive circuit respectively; and the motor drive circuit is connected with the electric motor. The drive device of the electric automobile has the benefits as follows: when motor drive adopts full bridge drive, a direct connection state can be allowed; high-magnification buck-boost of a low voltage battery pack can be well realized, and the magnification adjustment range is wide; and when the number of batteries is small, a whole system can be driven, motors with different nominal voltage can be driven in the same battery management system in a wider range, and modular design of the battery management system is ...

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Номер записи: 17