79 results about "Phase conversion" patented technology

The invention discloses a dimension-level constellation disassembly transmission method based on high-dimensional constellation selective mapping, and belongs to the technical field of optical fiber communication. The method comprises the steps that a traditional high-dimensional constellation is constructed, the number of constellation points needing to be extracted is determined through an entropy limit adaptive tuning function, then needed constellation points are extracted from the traditional high-dimensional constellation, and a shaped high-dimensional constellation is obtained; performing dimension-level disassembly on the shaped high-dimensional constellation to obtain a low-dimensional constellation set; performing phase conversion on the low-dimensional constellation set, and transmitting the converted low-dimensional constellation set to a channel for transmission in a spherical coordinate And receiving the low-dimensional constellation set at a receiving end, combining and restoring the low-dimensional constellation set into a high-dimensional constellation, and performing corresponding judgment on the high-dimensional constellation to obtain bit data. Part of constellation points are selected from a high-dimensional constellation to carry out data bearing and transmission, and the Euclidean distance between the constellation points is increased to reduce the bit error rate. And a high-dimensional constellation is disassembled into a low-dimensional constellation set for transmission in the form of a spherical coordinate system, so that the bit error rate rise caused by relatively large influence of a channel on transmission is avoided.

The invention relates to the technical field of pumped storage unit control, and discloses a control method and system for a phase modulation working condition of a constant-speed pumped storage unit, and the method comprises the steps: obtaining a control instruction which is used for controlling the working mode of the pumped storage unit to be converted from a power generation working condition to a phase modulation working condition; controlling the pumped storage unit to be switched from an automatic voltage regulation mode to an automatic reactive power regulation mode based on the control instruction; based on the control instruction, in the process of controlling the active power of the pumping storage unit to be reduced, the reactive power of the pumping storage unit is synchronously and actively improved; working parameters of the pumping and storage unit are obtained in real time, when the working parameters meet the preset water pressing condition, a water pressing instruction is output, and the water pressing instruction is used for controlling the pumping and storage unit to press water; and when water pressing is completed, after the active power and the reactive power of the pumping and storage unit are controlled to be stabilized at the corresponding preset target values, the pumping and storage unit completes working condition conversion. The pumping and storage unit is continuous in reactive power support and high in response speed in the process from the power generation working condition to the phase modulation working condition.

The present disclosure discloses a control circuit and a control method for a multiphase power supply and the multiphase power supply. The control circuit includes a current reference signal generator and a controller. The current reference signal generator is configured to adjust a first compensation signal according to a first scaling factor and a first voltage signal, so that the first compensation signal follows the first voltage signal in a steady state, and a current reference signal is obtained according to the first compensation signal and the first voltage signal. The controller is configured to obtain a control signal for each phase power conversion circuit according to the current reference signal to control each phase power conversion circuit to provide a power output to a load. The present disclosure can improve a phase-conversion stability of the multiphase power supply, and can achieve fast and accurate control of the multiphase power supply.

According to one embodiment of the present disclosure, there is provided a phase conversion device including: at least one base portion provided to extend in a longitudinal direction and having a first circuit pattern formed on one surface; a pair of ground walls extending from both lateral sides of each of the at least one base portion in a direction parallel to a height direction perpendicular to the at least one base portion; a pair of pattern walls provided so as to protrude from one surface of each of the at least one base portion in a direction parallel to the height direction, at least one surface of each of the pair of pattern walls having a second circuit pattern formed thereon, the second circuit pattern being electrically connected to the first circuit pattern; and a pair of dielectrics provided to be movable in a direction parallel to the longitudinal direction, at least a portion of each of the pair of dielectrics being disposed between each of the pair of ground walls and each of the pair of pattern walls.

A Fourier-based semantic data augmentation method using an uncertainty guide, and an apparatus therefor are disclosed. The Fourier-based semantic data augmentation method using an uncertainty guide comprises the steps of: applying an input image to an augmentation module so as to convert the input image into a frequency domain, and then generating a context-augmented image through amplitude and phase conversion; applying a Bezier transformation result on the basis of the input image and an input mask to the augmentation module so as to convert same into the frequency domain, and then generating a position-augmented image through amplitude and phase conversion; applying the context-augmented image and the position-augmented image to segmentation models so as to generate each of a context uncertainty map and a position uncertainty map; generating an uncertainty guide map by fusing the context uncertainty map and the position uncertainty map; and generating a mutual augmentation image by using the context-augmented image, the position-augmented image and the uncertainty guide map.

Provided is a high-frequency power supply device and an output control method thereof, capable of reducing ripple when converting input from a three-phase AC power supply to DC and capable of performing output control in a high-frequency band. A high-frequency power supply device includes an AC-DC converter that converts input from a three-phase AC power supply to DC and a high-frequency amplifier that includes a plurality of FET elements and outputs high-frequency AC power, wherein the output of the AC-DC converter is directly input to the high-frequency amplifier, and the high-frequency power supply device further includes a phase conversion circuit that provides a phase difference that cancels out fluctuation components included in DC to gate signals input to the plurality of FET elements. The input from the three-phase AC power supply is converted to DC and directly input to the high-frequency amplifier, and switching is performed by imparting a phase difference that cancels out fluctuation components included in DC to gate signals input to the plurality of FET elements, thereby generating high-frequency AC power.

According to an embodiment of the present disclosure, provided is a phase shifter comprising: at least one base panel extending in a longitudinal direction; at least one wall panel extending from at least one of both opposing sides in a transverse direction of each of the at least one base panel in a direction parallel to a height direction perpendicular to the at least one base panel; at least one support body fixed to one surface of each of the at least one base panel; at least one feed line supported by the at least one support body so as to be spaced apart from one surface of each of the at least one base panel in the height direction; and at least one dielectric configured to be movable in a direction parallel to the longitudinal direction, wherein at least a portion of each of the at least one dielectric is disposed between each of the at least one wall panel and each of the at least one feed line.

The invention relates to the field of organic light-emitting materials, and mainly relates to a piezochromic organic light-emitting material and a preparation method and application thereof. A preparation method of the piezo-chromic organic light-emitting material comprises the following steps: synthesizing an intermediate; mixing the intermediate, 4-(diphenylamino) phenylboronic acid, tetrakis (triphenylphosphine) palladium, tetrabutylammonium bromide, alkali and a reaction solvent, and performing heating reaction to obtain a second mixture; and extracting, drying, concentrating and purifying the second mixture to obtain the piezochromic organic luminescent material. The piezochromic luminescent material disclosed by the invention has the characteristics of single force stimulation induction of multicolor change, piezoluminescence enhancement and crystalline phase-to-crystalline phase conversion function; the luminescent material also has the advantages of low raw material cost, simplicity and convenience in synthesis, wide application environment, multicolor reversible switching and high contrast ratio, is an excellent force stimulation response type luminescent material, and can be used for pressure detection, sensors, information storage devices, anti-counterfeiting materials, memory materials or biological probes.

A circulation device (100) for a two-phase cooling system comprises: a liquid feed pump (10); an inlet-side connection part (15) that is in thermal contact with a battery (81) of a moving body (80) and can be attached to and detached from a refrigerant inlet of an evaporator (60) into which flows a liquid-phase refrigerant having a boiling point lower than the usage temperature of the battery (81); an outlet-side connection part (16) that can be attached to and detached from a refrigerant outlet of the evaporator (60); and a phase conversion unit (11) that converts a gas-phase refrigerant flowing out of the evaporator (60) into a liquid phase.

An antenna element receives a first radio wave and outputs a transmission signal, and receives a second radio wave and outputs a reception signal. A phase conversion unit applies a predetermined phase shift amount to a signal to be input and then output the signal. A switch connects the antenna element to one of the phase conversion unit and external receiver. When the first radio wave enters the antenna, the switch connects the antenna element to the phase conversion unit, and the transmission signal to which the predetermined phase shift amount has been applied is radiated from the antenna element. A third radio wave radiated from each of a plurality of RIS elements is deflected in a predetermined direction. When the second radio wave enters the antenna, the switch connects the antenna element to the external receiver, and the external receiver receives the reception signal.

The present invention relates to a multi-phase resonant converter, comprising: an input node; an output node; at least two-phase conversion circuits, each phase conversion circuit comprising a resonant circuit connected to the input node and a switching circuit connected between the resonant circuit and the output node, the resonant circuit comprising at least two-stage resonant tanks and multiple switching elements, the switching circuit having a bridge topology composed of multiple power transistors, one end of each stage resonant tank, by means of a corresponding switching element of the multiple switching elements, being connected to a previous stage resonant tank or to the input node, and the other end being directly connected to a corresponding bridge node in the bridge topology; and a control module, which is configured to selectively control the on / off of each power transistor and each switching element in the at least two-phase conversion circuits, so as to achieve a predetermined phase shift between the output signals of the at least two-phase conversion circuit.

The present invention provides a receiving device and a receiving method that can improve the receiving performance of receiving radio waves transmitted by a transmitter, even when the receiving antenna cannot be positioned away from a noise source. [Solution] The first receiving antenna 18 and the second receiving antenna 19, which receive the transmitted radio waves Sa transmitted from the transmitter 3, are positioned along the propagation path of the transmitted radio waves Sa which are diffracted by the radio wave shielding provided on the vehicle 2, at a position where they receive noise waves transmitted from the noise source of the vehicle 2 in phase, and at positions spaced apart d from each other. The conversion unit 15 converts the phase of the first received radio wave Sb1 received by the first receiving antenna 18 to the phase of the second received radio wave Sb2 received by the second receiving antenna 19. The combiner 16 combines the first received radio wave Sb1 input from the conversion unit 15 and the second received radio wave Sb2 received by the second receiving antenna 19 and outputs it to the receiver 17.

The application discloses a radiation refrigeration coating with a recyclable function and a preparation method thereof, and belongs to the technical field of refrigeration coatings.The coating is composed of base oil 500SN, hollow silica microspheres (SiO2@APTES) modified by a silane coupling agent, a liquid metal-based crosslinking agent (GLM) composed of a self-prepared urea-based monomer (UM), cetyl methacrylate (CMA) modified liquid gallium (Ga), talcum powder, calcium carbonate, ethylene glycol butyl ether, polyacrylate, methyl ethyl ketone oxime and methyl methacrylate.The GLM crosslinking agent in the coating has a reversible thermal stimulation response, can reversibly perform phase conversion under thermal stimulation, and simultaneously endows the coating with recyclable performance.Meanwhile, the introduction of the SiO2@APTES realizes high reflection of sunlight and high emission of a medium and far infrared band, and guarantees excellent radiation refrigeration performance of the coating.

The present invention provides an electric motor allowing stable drive control to be performed even when, in multipole motors, a resolver is used in a position sensor and combinations are realized in which the pole number ratio between the number of poles in the electric motor and the number of poles in the resolver is an indivisible non-integer multiple. This electric motor is characterized in that: said electric motor comprises an electric motor body, a position sensor that detects the position of a rotor of the electric motor body, and a control device that controls driving of the electric motor body; the control device includes a vector control unit that calculates a voltage command value on the basis of information on current flowing in the electric motor body and information on the position of the rotor detected by the position sensor, and an electrical angle phase calculation unit that calculates the electrical angle phase of the electric motor body; the electrical angle phase conversion unit includes an electrical angle conversion unit that converts sensor phase information, which is phase information for the motor body as acquired from the position sensor, into electrical angle phase information, which is phase information for the electrical angle of the rotor, in accordance with the pole number ratio, which is the ratio of the number of rotor poles, which is the number of poles of the rotor, and the number of position sensor poles, which is the number of poles of the position sensor, and outputs the electrical angle phase information, a rotor phase estimation unit that estimates the phase information of the electrical angle of the rotor and outputs the resulting estimate as a position estimation result, a phase correction amount calculation unit that calculates a phase correction amount according to the sensor phase information and the position estimation result, and a phase correction amount addition unit that generates corrected electrical angle phase information according to the value obtained by adding the phase correction amount to the electrical angle phase information; and the phase correction amount calculation unit calculates an initial phase correction amount according to the position estimation result for when the position sensor outputs 0-degree-phase information as the sensor phase information, calculates, once the initial phase correction amount has been calculated, a correction unit amount whereby 1 is added when the sensor phase information outputted by the phase sensor when the initial value is 0 has changed from 360 degrees to 0 degrees and 1 is subtracted when the sensor phase information outputted by the phase sensor when the initial value is 0 has changed from 0 degrees to 360 degrees, calculates a unit correction amount, which is the value obtained by multiplying the pole number ratio decimal value by 360 degrees, said pole number ratio decimal value being the value of the pole number ratio after the decimal point, and calculates as the phase correction amount a value obtained by multiplying the unit correction amount by the correction unit number and adding the resulting product to the initial phase correction amount.

An optical signal transmitting device comprises an optical transmitter and a mode converter. The optical transmitter transmits a multi-path transmitted initial optical signal to the mode converter, wherein the initial optical signal comprises a first optical signal and a second optical signal both having a first wavelength, and a third optical signal having a second wavelength different from first wavelength. The mode converter is configured to perform phase conversion on the incident initial optical signal to obtain and reflect a first target optical signal, which is single-path transmitted and comprises the third optical signal, the first optical signal transmitted in a first mode, and the second optical signal transmitted in a second mode different from the first mode.

The present application relates to a kind of electric vehicle electronic mechanical brake gap self-adjusting control method, compared with prior art, it solves the initial brake gap calibration difficulty, cannot realize the defect of gap self-adaptive regulation.The present application includes the following steps: the design of working phase conversion module;The calculation of accurate target position;The reconstruction of position closed-loop control system;Electronic mechanical brake gap self-adjusting control.The present application realizes the calibration of initial gap of electronic mechanical brake system by obtaining accurate position closed-loop reference value, realizes accurate gap compensation by obtaining contact limit position, separation limit position and gap adjustment position, and realizes self-adjusting control according to target gap.

The present disclosure relates to a direct-current / alternating-current conversion circuit and an energy storage and conversion apparatus. The direct-current / alternating-current conversion circuit comprises: three single-phase conversion circuits, a first end of each single-phase conversion circuit being a direct-current end, a second end of the single-phase conversion circuit being an alternating-current end, and the single-phase conversion circuit being used for mutual conversion between a direct-current current and a single-phase alternating-current current. When the second ends of the three single-phase conversion circuits are shorted, the alternating-current phases of the three single-phase conversion circuits are the same, and when the second ends of the three single-phase conversion circuits are not shorted, phase differences exist among the alternating-current phases of the three single-phase conversion circuits. The direct-current / alternating-current conversion circuit can be compatible with a three-phase power grid and a single-phase power grid, so that an energy storage device using the direct-current / alternating-current conversion circuit has good flexibility during grid connection.

The present invention relates to a signal design technique resistant to phase distortion and may provide a method of a transmitter, the aspect comprising the steps of: modulating a sequence of source bits to be transmitted to a receiver to generate a first block of symbols; inserting at least one pilot into the first symbol block to generate a second symbol block; performing cumulative linear coding on the second symbol block to generate a third symbol block; performing real phase conversion on the third symbol block to generate a first signal converted to a phase value; adding a cyclic prefix (CP) to the first signal to generate a second signal; and wirelessly transmitting the second signal to the receiver.

The invention relates to a direct current exchange conversion circuit, which comprises three single-phase conversion circuits, the first ends of the single-phase conversion circuits are direct current ends, the second ends of the single-phase conversion circuits are alternating current ends, and the single-phase conversion circuits are used for mutual conversion between direct current and single-phase alternating current; under the condition that the second ends of the three single-phase conversion circuits are short-circuited, the alternating current phases of the three single-phase conversion circuits are consistent, and under the condition that the second ends of the three single-phase conversion circuits are not short-circuited, the alternating current phases of the three single-phase conversion circuits have phase differences. The DC-AC conversion circuit can be compatible with a three-phase power grid and a single-phase power grid, so that the energy storage equipment applying the DC-AC conversion circuit has better flexibility during grid connection.

The utility model relates to a phase conversion PWM (Pulse Width Modulation) circuit, which comprises a phase conversion circuit, a rectification filter circuit connected with the phase conversion circuit, an auxiliary power supply, and a phase light modulator connected with the rectification filter circuit, wherein the phase light modulator is connected with an alternating current power supply; the rectifying and filtering circuit is used for converting alternating current into direct current; the phase conversion circuit is used for outputting a PWM signal. According to the utility model, the PWM signal is output through the rectification filter circuit and the phase conversion circuit, the loss is small, the whole circuit does not need to use a photoelectric coupler, the low-voltage PWM signal can be well output, the whole cost is low, and the reliability is high.

The application is suitable for the technical field of lamp effect control, and provides a lamp effect control method, a sound and an atmosphere lamp device. The method comprises the following steps: after detecting a current rhythm point, first determining an expected cut-off position of a lamp effect according to an intensity value of the current rhythm point, a starting lamp bead position of a lamp strip and an end lamp bead position of the lamp strip, then performing phase conversion on the expected cut-off position to obtain a target motion phase; if it is determined that phase resetting is needed according to the target motion phase and a current motion phase, then controlling the lamp effect motion according to the predicted cut-off position. After detecting the rhythm point, the application immediately detects whether lamp effect adjustment is needed, instead of forcibly completing the current motion cycle, thereby eliminating the problem of response lag under high-frequency rhythm. In addition, the application performs phase resetting only when the phase deviation reaches a threshold value, thereby avoiding the jump, flicker and motion disorder caused by simple hard interruption, making the lamp effect start and stop and turn naturally smooth, and significantly improving the visual comfort.

Provided in the present application are a virus removal filter membrane and a preparation method therefor, belonging to the technical field of membrane separation. The filter membrane preparation method comprises blending a hydrophilic polymer and a bulk polymer to prepare casting solutions having different viscosities, and on the basis of a double-layer homogeneous compounding method and a phase conversion method, preparing the filter membrane. The filter membrane has an integrated structure, and comprises a dense separation layer distributed along the thickness direction of the filter membrane and a pre-filter support layer having a loose sponge structure. The separation layer is adjacent to the support layer, but there is no obvious interface or stratification. The pore diameters of the separation layer and the support layer has a continuous gradient change along the thickness direction, wherein the pore diameter of the support layer is greater than the pore diameter of the separation layer.

The application discloses a three-section composite kiln for preparing spherical alumina, which comprises an infrared preheating section, a microwave medium-high temperature phase conversion section and a plasma heating section which are sequentially and tightly connected; the microwave medium-high temperature phase conversion section is connected with the infrared preheating section and the plasma heating section through a first microwave energy suppressor, and the microwave medium-high temperature phase conversion section is connected with the plasma heating section through a second microwave energy suppressor, so as to protect the safety of the operators of the equipment; the infrared preheating section, the microwave medium-high temperature phase conversion section and the plasma heating section are sequentially connected to form the main body of the three-section composite kiln for preparing spherical alumina; the infrared preheating section is used as a pretreatment section and is used for drying and dehydrating alumina raw materials; the microwave medium-high temperature phase conversion section is used as a crystal phase conversion section and is used for converting alumina from a gamma phase to an alpha phase through microwave radiation; and the plasma heating section is used as a spherical shaping section and is used for spherical shaping of molten alumina particles through gas suspension turbulent flow.

The invention discloses a control method and control circuit of a three-phase conversion circuit and electronic equipment, and the control method of the three-phase conversion circuit comprises the steps: determining one phase in the three-phase conversion circuit corresponding to the one with the maximum amplitude absolute value in A, B and C three-phase input voltages as a triangular current control phase, and determining the other two phases as current interruption control phases; a first energy storage time, a first follow current time and a first switching period are obtained by using a first energy storage inductance voltage and a first follow current inductance voltage of the triangular current control phase, so that a first control signal is generated for controlling the triangular current control phase; and respectively obtaining second energy storage time and second follow current time corresponding to each phase by utilizing the first switching period and each second characteristic parameter so as to generate a second control signal for controlling the current interruption control phase. Through the mode, the control method of the three-phase conversion circuit is convenient for realizing zero voltage switching and / or valley voltage switching, the efficiency is improved, and the cost is reduced.

The present application relates to a kind of compact railway energy regulation complex and its control method, including the converter unit with the core of medium-frequency transformer, the magnetic field of medium-frequency transformer is to the decoupling inductance of collision and filter capacitor and is constituted the second harmonic filter branch of converter unit DC side, filter each converter unit DC side in single-phase conversion system The second harmonic component is removed.Compact railway energy regulation complex uses double-phase shift control and passive control etc.Control method, can accurately control the power flow distribution of two power supply arms and realize traction transformer primary side three-phase current balance control, and using the linear quadratic regulator LQRI control method based on band integration is carried out energy comprehensive regulation, can effectively suppress the voltage fluctuation of feeder side, improve the comprehensive energy utilization rate and new energy consumption rate of electric railway system.Because of the existence of medium-frequency transformer, compared with the electric energy regulation device with the basic topology of traditional railway power regulator, compact railway energy regulation complex has higher integration.

A modulo-based ADC implementation is provided and involves converting an input analog signal into phases of other M periodic analog reference signals based on one or more transfer functions, wherein M≥2. The phase of each of the M reference signals comprises a folded signal corresponding to the input analog signal that is amplitude-folded to fall within a required amplitude range. This signal-to-phase conversion allows a modulo operation to be implemented over the input analog signal. Further, the M reference signals are used to obtain M discrete-time digital signals which, in turn, are used to obtain a digital representation of the input analog signal.

The disclosure provides a three-phase AC-DC converter and a fault current suppression method. The three-phase AC-DC converter comprises an AC filter unit, a three-phase conversion bridge arm unit, and a DC filter capacitor. The AC filter unit comprises three-phase filter circuits, and one end of each phase filter circuit is connected to a three-phase AC port on the AC side in a phase corresponding manner. The three-phase conversion bridge arm unit comprises three-phase conversion bridge arms, and the midpoint of each phase conversion bridge arm is connected to the other end of each phase filter circuit. The two ends of the DC filter capacitor are connected to the two ends of each phase conversion bridge arm, and the two ends of the DC filter capacitor are connected to two DC ports on the DC side. Each phase conversion bridge arm comprises a first bridge arm and a second bridge arm located on both sides of the midpoint of the conversion bridge arm, and a protection branch connected between the first bridge arm and the second bridge arm. The protection branch comprises a protection capacitor and a diode connected in series, and is used for suppressing the fault current when a short circuit fault occurs.

One aspect of the utility model is a multi-phase conversion circuit comprising a primary side switching circuit. The primary side switching circuit includes a plurality of complementary pairs of transistors. The plurality of transistor complementary pairs are coupled in parallel. The multi-phase conversion circuit also comprises a resonant tank which is coupled to the primary side switching circuit and comprises a plurality of capacitors, a plurality of resonant inductors and a plurality of transformers. The multi-phase conversion circuit also includes a secondary side switching circuit coupled to the resonant tank, and the secondary side switching circuit is of a full bridge architecture. Each of a plurality of complementary transistor pairs of the primary side switching circuit includes a first transistor and a second transistor that are complementary. The first transistor and the second transistor are coupled in series. A node is arranged between the first transistor and the second transistor of each complementary pair of transistors. The node is coupled to a corresponding one of the plurality of resonant inductors of the resonant tank.

The objective is to provide a wideband mode converter that can convert an input in TE10 mode, used in rectangular waveguides, etc., to an output in TM01 mode, used in circular waveguides, etc. [Solution] The mode converter includes an input unit, a first rectangular output unit, and a second rectangular output unit, and comprises an inverse phase conversion unit that converts the TE10 mode electromagnetic wave input to the input unit into two electromagnetic waves with a phase difference of 180° from each other and outputs them to the first rectangular output unit and the second rectangular output unit, a first semicircular output unit connected to the first rectangular output unit and equipped with a first semicircular output unit, a second semicircular output unit connected to the second rectangular output unit and equipped with a second semicircular output unit, and a TM01 mode generation unit connected to the first semicircular output unit and the second semicircular output unit that generates the TM01 mode and outputs it to the circular output unit.

A method for controlling an on-board charger is provided. A transformer side of an AC / AC conversion circuit is connected to an alternating current side of an AC / DC conversion circuit through a transformer. A reference peak value of a grid-side current of the on-board charger is regulated based on a deviation of a sampled value of a battery-side voltage relative to a reference value of the battery-side voltage. The reference peak value of the grid-side current is converted into an instantaneous reference value of the grid-side current based on a phase of an instantaneous sampled value of the grid-side voltage of the on-board charger. Phase-shift control is performed on the two conversion circuits based on the instantaneous reference value of the grid-side current, the instantaneous sampled value of the grid-side voltage and the sampled value of the battery-side voltage.