109 results about "Phase switching" patented technology

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.

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.

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.

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.

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.

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 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 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.

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.

The present application relates to the field of automatic control technology, specifically to a comprehensive automatic control method with redundancy fault-tolerant function, comprising the following steps: three-axis sensor collects vibration data, extracts characteristic parameters in combination with angular displacement pulse, K-means clustering evaluates modal quality, deformation gradient threshold value triggers abnormal identification, harmonic distortion is more than 15% to switch redundancy channel, fusion characteristics calculate power factor, phase switching loop, adjust PWM duty cycle in three intervals, regression correction generates brake curve verification execution, execute corrugated roller machine redundancy channel switching and parameter reloading. In the present application, three-axis vibration is combined with angular displacement to construct characteristic parameter clustering division mode evaluation quality, deformation correlation identifies abnormality, harmonic monitoring dynamically switches path to stabilize data flow, distortion rate calculates power factor, phase switching loop, adjusts PWM duty cycle according to power factor to improve precision, constructs vibration-modal-redundancy closed-loop system, realizes state identification and energy efficiency improvement.

The application discloses a multiphase switching converter, a controller and a control method thereof. The controller comprises a comparison circuit, a time length adjusting unit and a switch control unit. The comparison circuit generates a comparison signal according to an output voltage and a reference signal. The time length adjusting unit provides an adjusted turn-on time length signal according to an initial turn-on time length signal and the comparison signal, so as to adjust the turn-on time length of a plurality of switch circuits in the multiphase switching converter according to the period of the comparison signal on the basis of the initial turn-on time length. The switch control unit controls the plurality of switch circuits to turn on in sequence according to the comparison signal, and controls the turn-off time of the plurality of switch circuits according to the adjusted turn-on time length signal. The multiphase switching converter adjusts the turn-on time length of the plurality of switch circuits in real time according to the period of the comparison signal, the control is more flexible, the power supply capacity is ensured when the switching frequency is increased, and therefore the response speed is faster.

The three-phase coupling carrier communication phase switching system comprises a three-phase coupling circuit, a three-phase signal switching module, a carrier power amplifier and a carrier MCU which are connected in sequence, the control signal output end of the carrier MCU is connected with the corresponding control signal input end of the three-phase signal switching module, and the carrier MCU is connected with the corresponding control signal input end of the three-phase signal switching module. And the control module is used for analyzing the received carrier data frame, extracting the signal strength and the signal-to-noise ratio, selecting an optimal phase, generating a control signal to drive a triode in the three-phase signal switching module, and dynamically adjusting the coupling phase of three-phase carrier communication. On the premise that carrier communication performance is not affected, communication coupling phases can be switched according to field environment noise and power line conditions, and therefore higher meter reading communication efficiency is achieved.

This application discloses a low-power temperature-compensated RC oscillator, comprising a low-voltage linear buffer, an RC core circuit, a comparator, a Schmitt trigger, a non-overlapping clock generator, and a level shifter. The low-voltage linear buffer uses intrinsic transistors to reduce operating voltage and power consumption; the RC core circuit employs temperature compensation technology, including a series low-temperature drift resistor and a temperature-dependent current source, causing the equivalent resistance to increase with temperature; the comparator compares a triangular wave signal with a reference voltage and outputs a reference clock; the Schmitt trigger filters out clock glitches; the non-overlapping clock generator generates a two-phase clock with dead time to control charging and discharging; and the level shifter converts the low-voltage domain clock to the high-voltage domain. This oscillator eliminates the influence of comparator offset voltage through two-phase switching control and employs low-voltage and temperature compensation technology to achieve a high-precision, low-temperature drift reference frequency in a small area with low power consumption, making it suitable for compact sensing and measurement systems.

The application discloses a control circuit and method of a multi-phase switching circuit and the multi-phase switching circuit, wherein the multi-phase switching circuit comprises N-phase switching circuits; for each phase switching circuit, the inductor current is reconstructed during the rising process of the inductor current, and the inductor current is directly sampled during the falling process of the inductor current to obtain a sampled inductor current; an upper limit value is set as a preset value obtained according to a compensation signal, and a lower limit value is set as a superimposed value obtained according to the compensation signal and a ramp voltage signal; the reconstructed inductor current is compared with the upper limit value to control the main switch tube to be turned off, and the sampled inductor current is compared with the lower limit value to control the main switch tube to be turned on. The application can solve the jitter problem caused by the noise of the inductor current in the working process through the comparison of the inductor current and the control of the main switch tube, and the switching frequency remains stable to meet the frequency requirement of the multi-phase.

The invention relates to the technical field of power distribution networks, in particular to a transformer three-phase imbalance treatment method and system based on big data. Firstly, three-phase power values of power distribution network users are collected through an intelligent electric meter, a power mean value is determined through the three-phase power values, and N-phase power of a power distribution network is calculated based on the three-phase power values of the power distribution network users and the power mean value; and then calculating the three-phase unbalance degree of the power distribution network based on the three-phase voltage value of the power distribution network user, judging whether a three-phase system needs load switching based on the three-phase unbalance degree, and then formulating a control adjustment strategy of load switching according to the size and relation of the three-phase active power. Based on the adjustment strategy, selecting a phase-change switch to carry out phase-change switching of the load, so that partial load or load combination in the heavy-load phase is switched to a light-load item; when the method is used for monitoring, evaluating and controlling the distribution transformer district based on a certain frequency, the dynamic unbalance degree of a three-phase system can be greatly reduced.

The application discloses a phase selection circuit of a multiphase control circuit and the multiphase control circuit, which comprises an amplifier circuit, a comparator circuit, a clamping state control circuit and a clamping signal control circuit. The amplifier circuit is configured to generate a comparison signal. The comparator circuit is configured to generate a phase switching signal according to the comparison signal and a second reference voltage signal. The clamping state control circuit is configured to generate a clamping state control signal and provide the clamping state control signal to the clamping signal control circuit. The clamping signal control circuit is configured to clamp the voltage value of a clamping signal at a clamping reference voltage. By setting the clamping state control circuit and the clamping signal control circuit for the multiphase control circuit, the inductance current peak value of the multiphase control circuit is clamped when the phase switching is performed during the load switching of the multiphase control circuit, so that the problem that the output voltage signal oscillates during the light and heavy load switching of the multiphase circuit in the prior art is solved.

The present application discloses a motor driver with automatic phase switching mechanism. After starting a three-phase motor, a back electromotive force detection circuit starts to detect back electromotive force signals of each phase of the three-phase motor. A drive waveform generation circuit acquires a plurality of first wave segments from a plurality of first wave patterns of a first wave pattern signal as a plurality of first wave segments of a first waveform signal according to the back electromotive force signals. A motor control circuit controls a motor drive circuit to drive the three-phase motor to operate normally according to the first waveform signal.

The present disclosure discloses a multi-phase switching power supply and a phase number control method thereof, and a control circuit. The multi-phase switching power supply comprises n phase power conversion circuits. The phase number control method comprises: controlling operating phase number of the multi-phase switching power supply according to a first parameter and load current; the first parameter comprising at least one of an input voltage, output voltage, and temperature of the multi-phase switching power supply, and the operating phase number refers to the number of power conversion circuits performing power operation. Compared with the existing technology which only controls the operating phase number of the multi-phase switching power supply based on the load current, the present disclosure can make the multi-phase switching power supply operate closer to the actual optimal efficiency curve, and even operate on the actual optimal efficiency curve, thus improving efficiency.

The invention discloses a low-power-consumption temperature compensation RC oscillator which is composed of a low-voltage linear buffer, an RC core circuit, a comparator, a Schmitt trigger, a non-overlapping clock generator and a level shifter. The low-voltage linear buffer adopts an intrinsic transistor to reduce working voltage and power consumption; the RC core circuit adopts a temperature compensation technology and comprises a series low-temperature drift resistor and a temperature positive correlation current source, so that equivalent resistance is increased along with temperature; the comparator compares the triangular wave signal with a reference voltage and outputs a reference clock; the Schmitt trigger filters clock burrs; the non-overlapping clock generator generates a two-phase clock with dead time to control charging and discharging; the level shifter converts the low voltage domain clock to the high voltage domain. The oscillator eliminates the influence of offset voltage of the comparator through two-phase switch control, adopts a low-voltage and temperature compensation technology, realizes high-precision and low-temperature-drift reference frequency under the conditions of small area and low power consumption, and is suitable for a compact sensing measurement system.

The invention discloses a multiphase switching power supply and a current sharing circuit thereof. The current sharing circuit comprises a processing unit used for providing a difference current between a master phase sampling current and a slave phase sampling current; the adjusting unit is connected with the processing unit and is used for providing average current according to the difference current and the reference current; the output unit is connected with the adjusting unit through the first current path and is used for outputting average current under the conduction state of the first current path; the clamping unit is connected with a first node, the first node is a common node of the adjusting unit and the first current path, the clamping unit clamps the first node according to the first voltage in an off state of the first current path, the multi-phase switching power supply comprises a master phase and a slave phase, and when an enable signal of the slave phase is an active level, the first node is a common node of the adjusting unit and the first current path. The first current path is conducted. And when the slave phase is not started, the voltage clamping of the first node is realized through the clamping module, so that the anti-interference performance of the multi-phase switching power supply is improved.

The invention relates to the technical field of communication, in particular to an air-ground coverage antenna device, a mode switching method and a mode switching device. The air-ground coverage antenna device comprises a control interface, a logic judgment circuit, a radio frequency interface, an antenna phase switching module and an antenna array, the control interface is connected with the logic judgment circuit, the logic judgment circuit and the radio frequency interface are respectively connected with the antenna phase switching module, the antenna phase switching module is connected with the antenna array, and the logic judgment circuit is connected with the radio frequency interface. And the antenna phase switching module is used for determining an air-ground scanning mode according to the first control information output by the logic judgment circuit and the radio frequency signal input by the radio frequency interface, wherein the air-ground scanning mode comprises at least one of a ground mode and an air mode. By adopting the method and the device, the air module or the ground module can be switched according to the condition of the current service, the module switching efficiency is improved, the flexibility and adaptability of the system are improved, the resource waste is reduced, and the resource utilization rate is improved.

The invention discloses a frequency-voltage conversion circuit, which realizes the function of generating a two-phase switch control signal with a phase difference by multiplexing a clock input signal representing frequency information in front of a frequency dividing circuit and performing simple combinational logic on the clock input signal and a frequency dividing signal. Therefore, the influence of process, voltage or temperature fluctuation on the stability of the circuit is avoided.

The utility model relates to an in-phase and inverted-phase automatic switching circuit, in particular to an in-phase and inverted-phase automatic switching circuit applied to a flying capacitor three-level circuit, which is used for solving the problems that in the prior art, an analog switch is used for switching circuits, the internal resistance of the analog switch is relatively large, the stray capacitance effect is obvious, extra interference is possibly introduced, and the cost is low. And the accuracy and the stability of control are influenced. The in-phase and inverted-phase automatic switching circuit applied to the flying capacitor three-level circuit realizes automatic switching of in-phase and inverted-phase signals through two operational amplifiers and a series of feedback resistors and capacitors in combination with an input signal Dx and an inductive current signal IL and through control of an NMOS transistor N1, thereby realizing regulation and balance of voltage.

The present invention discloses a fractional multi-mode frequency divider circuit based on space-time averaging and phase interpolation technology, comprising: 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 to perform time averaging on the input frequency division ratio to generate an instantaneous frequency division ratio; the dynamic element matching and phase selection module is used to perform spatial averaging on the instantaneous frequency division ratio and generate a frequency divider control word and a phase interpolator control word; the phase switching frequency divider module is used to generate a clock signal corresponding to the frequency division ratio based on the frequency divider control word; and the pipelined phase interpolation module is used to perform phase interpolation on the clock signal to generate a final clock signal with an accurate phase. The embodiments of the present invention utilize the mutual cooperation of the various modules to achieve the integration of space-time averaging technology and phase interpolation technology, thereby improving the limitations of space-time averaging technology.