147 results about "Phase conversion" patented technology

The invention discloses an excitation loss fault-tolerant control method and system of an electro-magnetic doubly salient motor, and belongs to the field of motor control. On the basis of rotating speed current double closed-loop control, the control mode of a current loop is improved, two electric cycles are divided into six current conduction states, the conduction state of a power tube is obtained in combination with a converter topological structure after motor excitation loss, the direction of three-phase current is changed, and therefore the commutation process of the current is optimized, and the current conversion efficiency is improved. The amplitude of current change is reduced, the torque pulsation of the motor after excitation loss is reduced, and the torque current ratio is improved. According to the invention, the problem that the torque pulsation is large and the torque current ratio is low when the electro-magnetic doubly salient motor adopts a traditional field loss fault-tolerant control strategy is solved. By changing the conduction sequence of the power tubes, the purposes of suppressing the torque ripple of excitation loss operation of the electro-magnetic doubly salient pole and reducing copper consumption are achieved, the algorithm control is simple, and the portability is high.

The invention provides a driving circuit, a driving method, a scanning circuit, a scanning method and a display device, and relates to the technical field of display driving. The driving circuit comprises a shift register sub-circuit and an output sub-circuit, and realizes phase conversion control from an effective level of a first control clock signal output by the shift register sub-circuit to a first level output by the output sub-circuit. The end time control of the first level output by the output sub-circuit is realized based on the control of the interval clock signal, and the purpose that the pulse width of the first level output by the output sub-circuit is adjustable can be realized by optimizing the interval clock signal. And the purpose of adjusting the interval of the first levels output by the output sub-circuits of the adjacent driving circuits in the scanning circuit is achieved. According to the technical scheme provided by the invention, improvement is carried out on the basis of the shift register sub-circuit, and the output sub-circuit connected with the output of the shift register sub-circuit is added, so that related functions of the driving circuit can be realized, and the design difficulty of the driving circuit is reduced.

The invention discloses a distributed power supply wireless synchronous grid-connected control method and system considering frequency difference, and the method comprises the steps: firstly, carrying out the real-time calculation of the phase of a far-end voltage through employing a virtual rotating shaft frequency phase conversion technology on the basis of considering the frequency difference between a near-end power grid and a far-end distributed power supply; secondly, an error coefficient is defined, and the compensation precision of the voltage phase in the synchronous grid connection process is quantified; and finally, improving the phase standard during grid connection of the distributed power supply by considering the error generated by the sampling frequency of the measuring device so as to ensure the seamless connection of the electric energy transmission between the distributed power supply and the power distribution network, reduce the energy loss, and monitor the voltage frequency conditions of the power distribution network side, the load side and the distributed power supply in real time. And the safety and reliability of power supply are ensured.

The invention discloses a vacancy isolation preparation method of monodisperse nano alpha alumina, and relates to the technical field of new materials, alpha alumina can be obtained through heat treatment of various activated alumina, but the alpha alumina can be obtained while alumina of other crystal forms is converted into alpha alumina. Generally accompanied by the process of combining and growing other crystal forms of nano-crystalline grains into wormlike alpha-type aluminum oxide crystalline grains, the nano-alpha-type aluminum oxide of less than 100 nanometers is difficult to obtain in a phase inversion manner. According to the preparation method, rho aluminum oxide which can be hydrated to obtain nano-particles is used as a raw material, through adsorption and desorption of lithium chloride, a hydration product is subjected to volume expansion, vacancies left after desorption of lithium ions change a conversion path of phase conversion to alpha aluminum oxide, and combination and growth (hard agglomeration) of crystal grains are prevented; therefore, the monodisperse nano alpha-type aluminum oxide can be efficiently prepared on a large scale.

Disclosed are a clock phase converter and a phase converting method that can generate a converted clock signal with a desired amount of delay by selecting and outputting an output signal corresponding to a preset value among output signals of a plurality of delayed clock signal generators that detect the transition of a clock signal and generate delayed clock signals by sequentially delaying the clock signal by a certain period of time.

The invention provides an information determination method, electronic equipment, a storage medium and a program product, which can be applied to the technical field of server firmware updating. The information determination method comprises the steps that in response to received to-be-verified information, the to-be-verified information is decoded based on a preset decoding strategy to obtain decoded information, the to-be-verified information is obtained by encoding identification information based on a preset encoding strategy, and the identification information is used for indicating a firmware updating process; the preset coding strategy comprises a coding conversion strategy and a phase conversion strategy; and under the condition that the decoding information is matched with reference information of the identification information, action information is determined from an action information set based on the equipment state, the storage partition and the process type of the identification information, so that an indicator lamp executes an indication action based on the action information, and the indication action is used for indicating an updating process of firmware.

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.

The present invention provides a highly efficient seawater treatment method, belonging to the technical field of seawater treatment. Specifically, an MBR membrane is prepared using polyethersulfone as a main material through a phase conversion method. The obtained MBR membrane has uniform pore size, good surface hydrophilicity, strong pollution resistance, good antibacterial properties, good adhesion between the support layer and the separation layer, and a long service life. The MBR membrane is used for seawater treatment, which can not only effectively remove organic matter such as COD and BOD, ammonia nitrogen, heavy metal ions, etc. in seawater, but also the seawater treatment method is mature, stable, and has good controllability, and is suitable for large-scale industrial applications.

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.

The disclosure discloses a chemical-shift-encoded imaging method and apparatus based on phase unwrapping, and a device. Comprises: performing phase conversion on the phasor candidate solution for the purpose of enabling a difference between a correct solution and an inverse decomposition solution of the phasor candidate solution to be within a set range, and on the basis of a phase unwrapping method, performing determination to obtain an intermediate phasor solution; determining a true phase of the intermediate phasor solution, and converting the true phase to a phasor candidate solution space to determine a target phasor solution; and on the basis of the target phasor solution, determining a first chemical component signal and a second chemical component signal, and on the basis of the first chemical component signal and / or the second chemical component signal, performing chemical-shift-encoded imaging.

The application provides a double Buck-Boost conversion device, which comprises a circuit board and three-phase conversion units arranged on the circuit board, the direct current side of each phase conversion unit is connected with a direct current source, and the alternating current side of each phase conversion unit is connected with a three-phase alternating current source; the circuit board is divided into three types of regions according to dv / dt, and the signal lines of bus capacitors, switch units, alternating current inductors and filter capacitors and other devices are divided into dynamic signals and static signals according to the type of emitted signals, and then the signal lines are routed on the static region, the dynamic region and the dynamic-static combined region of the circuit board, so that the layout of the conversion circuit is optimized, the interlayer parasitic capacitance is reduced, and the electromagnetic radiation is optimized.

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 application relates to a kind of river course type lithologic trap lateral pinch-out identification method, system and readable storage medium, which includes the following steps: by phase conversion technique, the key geological features in seismic data are clearer, and lateral pinch-out phenomenon is facilitated to identify.Then, using isochronous strata slice technology, the abnormality and fracture in stratum can be accurately found, whether lateral pinch-out appears in river channel sand body is preliminarily judged.Next, time-frequency analysis enables in-depth understanding of seismic signal.Finally, by integrating information under different frequencies, a comprehensive description about river channel sand body distribution and thickness variation is obtained.The present application solves the problems of insufficient evaluation of lateral pinch-out conditions and insufficient accuracy of judgment results for river course type lithologic trap, realizes qualitative and quantitative evaluation of lateral pinch-out, and improves the accuracy and reliability of evaluation.

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.

A grid-forming control method for a new energy converter is provided, and is applied to a new energy converter. The new energy converter includes a conversion circuit and a controller, where an input end of the conversion circuit is configured to connect to a direct current source, and an output end of the conversion circuit is configured to connect to an alternating current system. After obtaining an active power at the output end of the conversion circuit, the controller converts a phase of the active power, to provide an inertia support characteristic in active power and frequency closed-loop control. The controller quickly controls a voltage parameter at the output end of the conversion circuit based on an active power obtained by delaying the phase, so that a voltage at the output end of the conversion circuit can be quickly adjusted without affecting the inertia support characteristic of an inverter.

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 invention discloses a neutral section passing system and method suitable for bilateral power supply mode electric section and neutral section conversion. The system comprises a first traction substation, a second traction substation, a first power supply arm, a second power supply arm, a first electric section, a section post and a ground automatic neutral section passing device. The partition station is used for enabling the first electric section to be electrified by closing a circuit breaker in a bilateral power supply mode, and is used for converting the first electric section into a first electric split phase by opening the circuit breaker when the bilateral power supply mode is split into a unilateral power supply mode; and the ground automatic neutral section passing device is used for conducting the first electronic switch group before the train drives into the first electric neutral section to enable the first power supply arm to supply power to a contact network of the first electric neutral section, and turning off the first electronic switch group after the train passes through the first electric neutral section to enable the train to finish electrified neutral section passing. According to the method, the technical effect that the train passes through the electric segmentation / electric phase splitting in a non-perception automatic electrified mode in the bilateral / unilateral power supply mode conversion state is achieved.

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.