182 results about "Phase switching" patented technology

The invention discloses an MMC sub-module fault processing method, device and equipment and a storage medium, and the method comprises the steps: obtaining the capacitor voltage value of a sub-module of an MMC and the bridge arm current value of the sub-module, the MMC comprises six bridge arms of three phases, each bridge arm comprises a plurality of sub-modules, the capacitor of each sub-module is connected with an equivalent series resistor in series, and further, the equivalent series resistor is connected with the capacitor voltage value of the sub-module of the MMC; the resistance value of an equivalent series resistor in the sub-module is monitored through the capacitor voltage value and the bridge arm current value, if the resistance value of the equivalent series resistor is higher than a preset resistance value, it is determined that the capacitor of the sub-module fails, fault-tolerant control is carried out on the sub-module through a voltage-sharing and circulating current suppression algorithm, a three-phase switching signal is output, and the three-phase switching signal acts on the MMC. Therefore, the circulating current fundamental frequency component and the double frequency component caused by fault-tolerant control after the fault can be eliminated through the circulating current suppression strategy, the effect of circulating current suppression is achieved, and the stability of system fault operation is improved.

The invention belongs to the technical field of vector modulation, and discloses a three-section vector modulation method and system, and the method comprises the steps: generating a reference voltage vector based on a controller, and obtaining a sector number of the reference voltage vector through a sector partitioning rule, obtaining a vector sequence and vector action time of a reference voltage vector based on sector numbers and a phase rotation calculation technology; and based on the vector sequence and the vector action time, generating a three-phase switch sequence of the reference voltage vector according to a three-segment vector calculation rule, and outputting a three-phase pulse width modulation signal by using the three-phase switch sequence and a modulation signal generation technology. Under the condition that the fundamental wave frequency is variable, the provided three-section type vector modulation can still operate under the fixed carrier wave and control frequency, and the switching capacity of a power device is fully utilized.

According to the frequency polarization reconfigurable transmission array antenna unit and the transmission array antenna, an orthogonal crisscross radiation patch is used as emission layer metal of the antenna unit, and polarization conversion and phase switching of the unit in different frequency bands are realized by controlling output voltage of a circuit to change on-off states of four diodes; therefore, the characteristics of high gain, high interference resistance, high polarization matching degree, high flexibility, adjustable polarization and beam scanning of the transmission array antenna are realized. Meanwhile, as the orthogonal cross-shaped radiation patch is used as the transmitting unit, and the X-polarization rectangular receiving patch is used as the receiving unit, both the transmitting unit and the receiving unit are printed on the dielectric plate, the structure is simple and compact, the processing is convenient, and the cost is low.

The invention relates to the technical field of automatic control, in particular to a comprehensive automatic control method with a redundant fault-tolerant function, which comprises the following steps of: acquiring vibration data by a three-axis sensor, extracting characteristic parameters by combining with angular displacement pulse, evaluating modal quality by K-means clustering, triggering an abnormal identifier when a deformation gradient exceeds a threshold value, and performing fault tolerance. When harmonic distortion exceeds 15%, redundant channels are switched, a characteristic is fused to calculate a power factor, a phase switching loop is carried out, a PWM duty ratio is adjusted in three intervals, regression correction is carried out to generate a braking curve, verification execution is carried out, and corrugated roller machine redundant channel switching and parameter heavy loading are executed. According to the method, characteristic parameter clustering division mode evaluation quality, deformation correlation abnormity identification, harmonic monitoring dynamic switching path stable data flow, power factor calculation through a distortion rate and phase switching loop are constructed through combination of three-axis vibration and angular displacement, the PWM duty ratio is adjusted according to the power factor to improve the precision, and a vibration-mode-redundancy closed-loop system is constructed. And state identification and energy efficiency improvement are realized.

A multi-phase switching converter provided according to an aspect of the present disclosure includes a power stage and a phase controller, and provides a regulated supply voltage from an input voltage in a light load condition. The power stage receives a phase control signal and drives an inductor to cause flow of an inductor-current according to the phase control signal, wherein a load-current of the multi-phase switching converter is formed from the inductor-current. The phase controller receives a current signal from the power stage at a pin, the current signal being in an analog continuous form to represent the inductor-current in the power stage. The phase controller integrates the current signal in the analog continuous form to generate a voltage-output representing a magnitude of the load-current, and determines the magnitude of load-current based on the voltage-output.

The invention provides a sampling modulation excitation signal phase acquisition device for an alternating current impedance method in the technical field of lithium battery detection. Comprising an excitation current AC signal synchronous extraction module, a signal in-phase and anti-phase switching control module, a phase adjustment module, a signal high gain and amplitude limiting module and a phase adjustment signal output module. The excitation current AC signal synchronous extraction module, the signal in-phase and anti-phase switching control module, the phase adjustment module, the signal high gain and amplitude limiting module and the phase adjustment signal output module are connected in sequence. The method has the advantage that the alternating-current impedance test precision is greatly improved.

This disclosure provides a charge pump circuit. The charge pump circuit according to this disclosure includes one or more cascaded boost units and output units having the same structure. Each boost unit has a dual-branch structure with top and bottom symmetry and connected to two sets of four-phase clock signals with opposite clock phases. By adjusting the phase relationship of the four-phase clocks, the rise time of the gate voltage of the transfer transistor can be delayed by advancing the falling edge of the driving clock of the secondary capacitor and delaying its rising edge. This ensures that the transfer transistor is in the off state at the moment of high-low phase switching, thereby avoiding the problem of reduced charge transfer efficiency caused by reverse charge flow between the input and output nodes of the boost unit.

A method for reducing magnetic core losses in a multi-phase switching power converter including a coupled inductor. The method includes (a) generating a plurality of periodic voltage waveforms, each periodic voltage waveform being applied across a respective winding of a plurality of windings of the coupled inductor, and (b) distributing flow of changing magnetic flux in a magnetic core of the coupled inductor by controlling phase shift among the plurality of periodic voltage waveforms such that at least two consecutive peak magnitude portions of the plurality of periodic voltage waveforms are not applied to respective windings of the plurality of windings of the coupled inductor that are immediately physically adjacent to each other.

The invention discloses an intelligent traffic flow processing method and system based on knowledge distillation and LLM, and the method comprises the following steps: predicting the traffic flow of a to-be-processed road section in a future preset time based on a space-time diagram convolution network according to multi-modal data; processing the traffic flow prediction result and the multi-modal data based on an A3C signal control network to obtain a signal lamp phase switching strategy and a green light duration adjustment factor; carrying out real-time traffic path distribution on the traffic flow according to the multi-modal data based on a path planning network; detecting a traffic abnormal event of the to-be-processed road section according to the multi-modal data based on an abnormal detection network; and respectively carrying out differential distillation strategies on each network based on the federated distillation network. Therefore, the space-time dynamism and the road network heterogeneity can be captured at the same time through combined application of the space-time diagram convolutional network and the path planning network; and meanwhile, a layered federated distillation framework is created, so that each network model can inherit global thinking while keeping domain characteristics.

The invention discloses a traffic signal control method and system based on multi-source event and double-loop phase cooperation, and relates to the technical field of traffic signal control, a road intersection mathematical model is constructed, a double-loop phase structure is set, and multi-source sensing data is collected in real time; based on the multi-source sensing data, modeling an intersection traffic signal control problem by adopting a deep Q network model, defining a state space, an action space and a reward function, decomposing a double-ring phase structure, and performing cooperative control by a plurality of agents; the reward function is constructed based on a vehicle delay time difference, a waiting time difference, a parking frequency difference and a queuing length difference; the intelligent agents are controlled to execute actions based on rewards fed back to the intelligent agents by the environment, phase keeping or phase switching is determined, an optimal phase scheme of signal control is obtained, timestamp driving, multi-event coupling analysis and a double-ring phase structure are fused, and intersection signal timing optimization is achieved in combination with a deep reinforcement learning algorithm.

The invention discloses a multi-phase power supply and a control circuit thereof, and the circuit comprises a feedback control circuit which is used for generating a phase switching signal according to a feedback signal of an output voltage and a reference voltage signal; the switch control circuit is used for generating a plurality of frequency division signals according to the phase cutting signal and controlling the main power tube of the corresponding power level circuit to be conducted according to the logic state of the plurality of frequency division signals; and the turn-on time control circuit is used for generating a turn-off trigger signal when the turn-on time of the main power tube of the triggered power level circuit reaches a set time, and the switch control circuit controls the turn-off of the main power tube of the triggered power level circuit according to the turn-off trigger signal and the plurality of frequency division signals. According to the multi-phase power supply, phase dislocation control among a plurality of power level circuits can be realized only by adopting one control loop, the circuit structure is simple, and circuit design simplification and circuit cost reduction are facilitated.

A phase distributor in a phase controller of a multi-phase switching converter detects and corrects errors in the generation of phase control signals used for activating multiple phases. The phase distributor receives a common control signal having a transition type indicating time instances at which generated timing signals are to be asserted, with the assertions timing the state change of corresponding phase control signals. A first error condition is when multiple of the timing signals are asserted in a cycle of the common control signal. A first corrective action entails avoiding the first error condition in a first future duration following the error detection. A second error condition is when none of the timing signals is asserted when the transition type occurs on the common control signal. A second corrective action entails avoiding the second error condition in a second future duration following the error detection.

The invention provides a method for realizing three-phase electric energy meter PRIME communication coupling phase adaptive switching, and the method comprises the steps: switching the phase of the current PRIME signal coupling connection through a power line phase coupling control circuit, monitoring the received effective PRIME signals through a physical layer protocol, carrying out the statistics and recognition of the optimal phase in the current power line environment, and carrying out the self-adaptive switching of the communication coupling phase of the three-phase electric energy meter. Switching to a corresponding phase path, so that signal transmission can be carried out through an optimal phase in a specific deployment environment and a current channel state, thereby improving the stability of a network and keeping an operation state with an optimal communication effect; the problem that when the PRIME communication technology is applied to the three-phase electric energy meter, the network stability and the communication effect are poor in part of field deployment environments due to fixed single-phase coupling is effectively solved.

An electrical tilt feed network (1), comprising: a power division network (11), comprising a main path feeder (111) and branch feeders (112); and a variable delay module (12) connected in series on one branch feeder (112) and comprising a first electrical tilt switch (121), a second electrical tilt switch (122) and a plurality of delay lines (123), wherein the plurality of delay lines (123) have the same impedance and different lengths, and two ends of each delay line (123) are respectively electrically connected to the first electrical tilt switch (121) and the second electrical tilt switch (121). In the present disclosure, the conduction of any delay line (123) can be realized by means of excitation of an electrical signal, thereby simplifying the structure of the variable delay module (12), and reducing the size and weight of the electrical tilt feed network (1); in addition, controlling the electrical tilt switch on the basis of the electrical signal improves the response rate, thereby improving the phase switching efficiency.

The present invention provides a power stage of a multiphase switching converter and a multiphase switching converter, the power stage comprising: a high-side switch and a low-side switch for periodically driving an inductor within a first interval and a second interval, respectively, based on a control signal, where the inductor is coupled to a node of the high-side switch and the low-side switch; the current sensing module is used for generating information on an output node of the power stage, and the information is used for representing the inductor current flowing through the inductor; and a switch coupled between the output node and an output pin of the power stage; wherein, when the power stage is in an inactive state, a component of the current sensing module for driving the output node remains in an energized state, and the switch is opened to disconnect the output node from the output pin.

A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control signals (which generate the output PWM signal to have alternating positive and negative pulses having a first pulse frequency) and a second set of free resonance signal sensing phase switching control signals (which enable the resonant tank circuit to generate a resonant decaying output voltage signal in the presence of a foreign object that is located near the wireless charger), where each continuous excitation phase switching control signal includes a plurality of positive or negative excitation pulses having the first pulse frequency, and where one or more quality factor parameters of the wireless charger are measured based on one or more electrical parameters of the resonant decaying output voltage signal.

The invention discloses a decimal multi-modulus frequency divider circuit based on space-time averaging and phase interpolation technologies. The decimal multi-modulus frequency divider circuit comprises a third-order noise shaping modulation module, a dynamic element matching and phase selection module, a phase switching frequency divider module and a pipelined phase interpolation module. The third-order noise shaping modulation module is used for performing time averaging on the input frequency dividing ratio to generate an instantaneous frequency dividing ratio; the dynamic element matching and phase selection module is used for spatially averaging the instantaneous frequency dividing ratio and generating a frequency divider control word and a phase interpolator control word; the phase switching frequency divider module is used for generating a clock signal corresponding to a frequency dividing ratio according to the frequency divider control word; and the pipelined phase interpolation module is used for performing phase interpolation according to the clock signal to generate a final clock signal with an accurate phase. According to the embodiment of the invention, the mutual cooperation of the modules is utilized, the fusion of the space-time averaging technology and the phase interpolation technology is realized, and the limitation of the space-time averaging technology is improved.

The invention relates to an input signal sampling control device and method, a test device and a test system, and the device comprises a signal delay parallel sampling module which is used for carrying out the delay sampling of a signal fed back by a to-be-tested device according to a configured delay parameter, and obtaining a sampling signal; the selection output module is connected with the signal delay parallel sampling module and is used for selectively outputting the sampling signals according to the configured sampling time; and the input configuration module is connected with the signal delay parallel sampling module and the selection output module and is used for setting delay parameters of the signal delay parallel sampling module according to the sampling time. By adopting a mode of first signal delay and then signal sampling selection output, phase switching of a clock is not needed, the signal sampling position can be dynamically changed in a more universal chip, and the design complexity is reduced.

A power stage of multi-phase switching converter includes a pair of power switches, a temperature sensor, a comparator and a current-sense block. The power switches are operated to be on or off by a phase controller of the converter to drive an inductor-current through an inductor. The temperature sensor generates a temperature signal indicative of the temperature of the power stage. The temperature signal is coupled to be indicated on a common path which indicates to the phase controller a first temperature derived from all of the temperature signals from all the operating power stages of the converter. A comparator compares magnitudes of the temperature signal and the first temperature. If the result indicates that the magnitudes are unequal, the current-sense block reports, to the phase controller, a first magnitude in variance with an actual magnitude of the inductor-current to cause the temperature to tend towards the first temperature.

The millimeter wave dual-frequency broadband 1-bit electric scanning reflection unit comprises a surface metal structure, a dielectric core plate layer and a back metal ground layer which are stacked from top to bottom, the surface metal structure comprises a main radiation patch, a radio frequency switch and a parasitic patch, the main radiation patch is connected with the back metal ground layer through a metalized through hole, and the parasitic patch is coupled with the main radiation patch through an interdigital structure; the electric scanning reflection unit realizes phase switching of response polarization by controlling the on-off state of the radio frequency switch, and the working frequency at least covers two millimeter wave typical frequencies. According to the invention, a wider frequency band is covered under the condition that the surface topological structure is kept unchanged. Through the improvement of the invention, the limitation of the narrow band of the traditional electric scanning unit is overcome, and more design schemes are provided for the electric scanning metasurface unit.

The invention provides a control method for improving transient power supply performance, a controller and a power supply device, the control method is used for performing switching control on a multiphase switching converter, and the multiphase switching converter converts an input power supply into a real-time output voltage meeting a load demand. The control method comprises the following steps: generating a level signal according to a comparison result of a real-time output voltage and a reference voltage; determining a transient level of the real-time output voltage according to the real-time output voltage and a preset target output voltage; generating a pulse setting signal based on the level signal and the transient level; wherein the time interval between adjacent pulses in the pulse setting signal is determined according to the transient level and the level signal; generating a periodic PWM control signal according to the pulse setting signal; the PWM control signal is utilized to perform periodic on-off control on the multiphase switching converter so as to adjust the real-time output voltage. According to the invention, the stability of the loop under load disturbance can be ensured, and the transient power supply performance is effectively improved.

The invention provides a continuous wave mud pulse code modulation method, device and equipment and a storage medium, and belongs to the technical field of oil and gas drilling. The method comprises the following steps: encoding detected target acquisition information into a multi-system code element; two code elements are taken as a group to form a code element group, and the code element group controls the rotating speed of a rotor together to form a modulated pressure wave signal for determining a phase delay degree and a phase switching position corresponding to the phase delay degree; wherein the phase switching position is a time period when the corresponding phase delay degree occurs in a modulation period of the code element group to the pressure wave signal. According to the invention, on the premise of not additionally occupying frequency band resources, the transmission information amount is doubled, so that the signal transmission rate based on the continuous wave mud pulse is doubled, and the defect of low transmission rate in the traditional code modulation mode for the continuous wave mud pulse is overcome.

The invention relates to a multi-phase switching power converter with low magnetic core loss and an associated method. A method for reducing magnetic core loss in a multi-phase switching power converter including a coupled inductor. The method includes (a) generating a plurality of periodic voltage waveforms, each periodic voltage waveform being applied on a respective one of a plurality of windings of the coupled inductor; and (b) distributing a varying magnetic flux flow in a magnetic core of the coupled inductor by controlling a phase shift between the plurality of periodic voltage waveforms, such that at least two consecutive peak size portions of the plurality of periodic voltage waveforms are not applied to respective ones of the plurality of windings of the coupled inductor that are physically adjacent to each other in close proximity.

The invention discloses a control chip and a control method for a multiphase switching converter. The control chip comprises a bidirectional input / output pin, a communication pin, an output voltage sampling pin and a plurality of switch control pins. The bi-directional input / output pins may be configured to be coupled to bi-directional input / output pins of other control chips for controlling other multi-phase switching converters to transmit signals between the plurality of control chips. Signals transmitted on the bidirectional input and output pins can be used for configuring a plurality of multiphase switching converters to output power in sequence. The communication pin may be configured to receive a command of a system controller. The output voltage sampling pin is used for receiving a voltage sampling signal representing the output voltage. And the control chip outputs a plurality of switch control signals through the plurality of switch control pins according to the voltage sampling signal and a command of the system controller so as to control the plurality of switch circuits to be sequentially switched on during the power output period of the multiphase switch converter.

A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.

The present invention discloses a motor weak magnetic field model predictive control method with integrated modulation function, comprising the following steps: step 1, establishing a current prediction model; step 2, respectively establishing a first cost function for solving the optimal duty ratio and a second cost function for solving the suboptimal duty ratio based on the current prediction model, and determining the final duty ratio based on the solution result of the first cost function; step 3, generating a three-phase switching signal based on the final duty ratio, and constructing a weak magnetic field regulator with a value of 1 and the maximum value of the optimal duty ratio; step 4, applying the obtained three-phase switching signal to a two-level voltage source three-phase inverter, and adjusting the inverter using a weak magnetic field regulator until the voltage limit is extended to a voltage hexagon. The present invention also provides a motor weak magnetic field model predictive control device. The method provided by the present invention can effectively improve the operating efficiency of a permanent magnet synchronous motor under weak magnetic field conditions.

The application relates to the field of artificial network control, in particular to an artificial network control method, device and system for shielding across a darkroom. By using a fiber link and an internal battery power supply architecture in a fully-closed shielding darkroom, the interference of personnel on a test environment is completely eliminated, monitoring of parameters such as internal temperature and voltage of the integrated darkroom is added, zero-crossing synchronization noiseless operation of phase switching is realized, in addition, user end environment adaptive identification, driving parameter dynamic calibration and equipment life prediction are realized, and the needs of high-precision, unattended automatic phase switching and testing are met.

The invention discloses a preheating control method for a carbon dioxide asynchronous motor compressor, which comprises the following steps of: 1, connecting a U phase, a V phase and a W phase output by a frequency converter into a motor of the compressor, and simultaneously collecting the temperature of the compressor in real time; 2, acquiring an input signal; 3, judging whether the temperature of the compressor reaches the preheating temperature or not; 4, judging whether the compressor is in a shutdown state or not; 5, judging whether the shutdown time reaches the preheating shutdown switching time or not; 6, whether the preheating one-way duration time is reached or not is judged; 7, calculating actual target current according to the temperature of the IGBT module; 8, calculating a preheating output voltage through an IP controller of a current loop according to the actual target current, and generating a corresponding output current; and 9, calculating an alpha-axis voltage and a beta-axis voltage, and outputting an SVPWM signal. According to the invention, the preheating voltage can be accurately controlled, customized current control is realized, single-phase overheating is avoided through systematic phase switching, and a safety protection mechanism is provided.

A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control signals (which generate the output PWM signal to have alternating positive and negative pulses having a first pulse frequency) and a second set of free resonance signal sensing phase switching control signals (which enable the resonant tank circuit to generate a resonant decaying output voltage signal in the presence of a foreign object that is located near the wireless charger), where each continuous excitation phase switching control signal includes a plurality of positive or negative excitation pulses having the first pulse frequency, and where one or more quality factor parameters of the wireless charger are measured based on one or more electrical parameters of the resonant decaying output voltage signal.

The utility model relates to the technical field of signal processing, in particular to an audio signal amplification circuit and audio equipment. The circuit comprises a phase switching unit and a signal amplification unit, the first end of the phase switching unit is connected with an external input signal, the second end of the phase switching unit is connected with the first input end of the signal amplification unit, the third end of the phase switching unit is connected with the second input end of the signal amplification unit, and a change-over switch is arranged in the phase switching unit. When the change-over switch is in an open state, the signal amplification unit carries out voltage amplification processing on the external input signal, and when the change-over switch is in a closed state, the external input signal is subjected to phase inversion and then is subjected to voltage amplification processing. By switching the phase state of the switch, reverse or normal amplification of the signal is realized, the requirement of the audio effect is met, and the application scene of the audio equipment is expanded.