8633 results about "Control switch" patented technology

The invention discloses a load transfer path regulation and control method and system based on a maintenance topology rule base, and relates to the technical field, and the method comprises the following steps: constructing a graph model, obtaining a load node of a shutdown device in the graph model, and obtaining a load path switching node based on a connected component analysis method; correcting the graph model to obtain a power grid topological graph of load path switching nodes, and generating a load path switching scheme based on a shortest path algorithm; a pre-switching adjustment strategy is set, and a load transfer action instruction is generated and executed step by step based on a load path switching scheme; carrying out local control on load transfer path adjustment based on a load transfer action instruction and a distributed control technology; the optimal load switching path is identified through connected component analysis and the shortest path algorithm, and the load transfer path of the maintenance equipment is controlled and switched according to the load transfer action instruction in combination with the distributed control technology, so that the stability, the flexibility, the response speed and the regulation and control precision of load path regulation and control are improved.

The invention provides a fault ride-through control method and device for a network construction type converter, and relates to the technical field of control. The method comprises the steps that if it is determined that the voltage amplitude of an alternating-current bus is smaller than the output grid-connected point voltage of a reactive loop, a control switch is turned on; the I coefficient, the D coefficient and the P coefficient are sequentially adjusted, the power deviation, the generalized inertia coefficient and the generalized damping coefficient are corrected by improving the electromagnetic active power until the grid-forming converter reaches fault ride-through, and the I coefficient, the D coefficient and the P coefficient at the moment are determined to be target parameters of the angular frequency PID compensator; and if it is determined that the AC bus voltage amplitude is greater than or equal to the reactive loop output grid-connected point voltage, the control switch is turned off. The device executes the method. According to the method and the device provided by the embodiment of the invention, the transient stability of the network-forming converter can be improved.

The invention relates to the technical field of wireless communication, and provides a radio frequency power amplifier and a radio frequency chip, the radio frequency power amplifier comprises an input matching circuit, a first-stage amplifier, a first inter-stage matching circuit, a second-stage amplifier, a second inter-stage matching circuit, a third-stage amplifier and an output matching circuit which are electrically connected in sequence; the radio frequency power amplifier further comprises a control module, a direct current power supply module, a first bias circuit, a second bias circuit and a third bias circuit. The first biasing circuit comprises a power detection network and a switch control circuit; the first input end of the power detection network serves as the first input end of the first bias circuit, the second input end of the power detection network serves as the second input end of the first bias circuit, and the power detection network is used for receiving a radio frequency signal, converting the radio frequency signal into a control voltage in a detection mode and outputting the control voltage to the input end of the switch control circuit. The control switch controls connection or disconnection of the circuit. According to the invention, the robustness of power can be improved.

A control switch incorporating a 1:2 demultiplexer is used to control timing for a concurrent switching, break-before-make and make-before-break power multiplexing, and is configurable to link a plurality of the control switches into a control chain to perform sequential charging, sequential discharging, parallel charging, parallel discharging, and concurrent sequential charging and discharging for a plurality of batteries coupled to the control chain in a power system.

The invention relates to a simple and reliable touch control switch. The simple and reliable touch control switch consists of a 12-V direct-current power supply, a one-way silicon controlled rectifier 1 (SCR1) trigger circuit, a one-way silicon controlled rectifier 2 (SCR2) trigger circuit, a relay control circuit and a load RL circuit. A conventional mechanical self-locking rocker switch or a toggle switch has the defects that actions are mechanical, operating actions are different because of persons, a contact is easy to jitter, a contact is easy to ablate, abrade and the like. The touch control switch is realized by only using a small number of common components and two touch metal pieces, namely an on-load circuit is switched on by touching a touch electrode once, and an off-load circuit is switched off by touching the touch electrode once. The overall touch control switch is made of discrete components, and strong electricity can be effectively isolated from weak electricity through a relay, so that the power supply of a load can use alternating current and also can use direct current. Therefore, the touch control switch has a certain function in the field of household appliances, industrial automation, and optical, mechanical and electrical integration.

The invention relates to the technical field of converter starting, in particular to an LLC full-bridge converter hybrid control soft start method, comprising the following steps: selecting a hybrid soft start strategy combining down-conversion starting and PWM starting, and respectively introducing nonlinear orders of a control switch frequency decline curve in the down-conversion starting process and a duty ratio rise curve in the PWM starting process; defining a mathematical formula of the change of the switching frequency and the duty ratio along with time when two nonlinear orders are different in value; establishing a simulation model, and substituting a mathematical formula that the switching frequency and the duty ratio change along with time when the two nonlinear orders are different in value into the simulation model; performing simulation testing on the nonlinear orders with different values, extracting the maximum resonance current, and determining an order combination with the best maximum resonance current suppression effect; and performing soft start of the LLC full-bridge converter based on the determined order combination. According to the invention, the current in the soft start process can be effectively suppressed, and meanwhile, quick start and device safety are considered.

An energy storage system comprises a set of swappable battery modules positioned in battery slots with a battery module being controlled by a control switch. The control switches are linkable to form a charging control chain and / or a discharging control chain respectively to control sequential charging / discharging, parallel charging / discharging, and segmented charging / discharging among the set of battery modules in the energy storage system. Methods to detect defective battery module in a battery slot are also presented. The energy storage system can be configured in an AC power distribution environment, a DC power distribution environment, or in an EV. The energy storage system is scalable, automatically reconfigurable and accepts AC power and regenerated DC power.

In accordance with some embodiments of the present disclosure, a multi-level power converter circuit includes a flying capacitor, a balancing capacitor to control a voltage across the flying capacitor, a plurality of converter switches, a control switch coupled between the flying capacitor and the balancing capacitor, and control circuitry to open and close the control switch based on states of at least two converter switches of the plurality of converter switches. In some embodiments, the multi-level power converter is a three-level buck converter, and the balancing capacitor maintains a voltage across the flying capacitor to be within a threshold range of half the input voltage of the buck converter. In some embodiments, a method for operating the multi-level power converter includes using control circuitry to operate the plurality of converter switches and the control switch to selectively couple the balancing capacitor to either side of the flying capacitor.

The invention discloses a generator access control method of an energy storage power generation system. The method comprises the following steps: connecting a generator to an alternating current side of an energy storage converter through a control switch; when the energy storage converter is in an off-grid state, if the total power supply amount of the energy storage converter meets the load requirement, the generator is disconnected with the load through the control switch, and at the moment, the energy storage converter carries out loading independently; if the total power supply quantity of the energy storage converter does not meet the load requirement, judging the output power of the generator; if the output power of the generator is not overloaded relative to the load demand, the control switch is closed to enable the generator to be loaded independently, and the energy storage converter seals waves; otherwise, the control switch is closed to enable the energy storage converter and the generator to be jointly loaded. The method has the advantages that the energy storage converter is subjected to wave sealing after the generator is connected into the system, power can be prevented from being accumulated on the bus for a long time, and the overvoltage risk of the bus is avoided.

The charging and / or discharging of a set of swappable battery modules in a battery system is carried out automatically using a set of charging and / or discharging control switches linked in a sequential charging and / or a discharging control chain. The charging and discharging of the set of battery modules can be done sequentially or in parallel, and is hardware-based with minimal software / firmware involvement. The system is scalable and automatically reconfigurable for use in an infrastructure and / or in an electric vehicle. The swappable battery modules may be positioned in the battery slots or butted together in the battery system.

The charging and / or discharging of a set of swappable battery modules in a battery system is carried out automatically using a set of charging and / or discharging control switches linked in a sequential charging and / or a discharging control chain. The charging and discharging of the set of battery modules can be done sequentially or in parallel, and is hardware-based with minimal software / firmware involvement. The system is scalable and automatically reconfigurable for use in an infrastructure and / or in an electric vehicle. The swappable battery modules may be positioned in the battery slots or butted together in the battery system.

The power conversion device provided by the invention comprises a direct current end, a positive direct current bus, a negative direct current bus, a positive bus capacitor, a negative bus capacitor, at least three inverter bridge arms, a switch unit, a controller, filter inductors corresponding to the at least three inverter bridge arms one by one, a filter capacitor and an alternating current end. And the third end of each inverter bridge arm sequentially passes through the filter inductor, the filter capacitor and the switch unit corresponding to each inverter bridge arm and then is connected with the midpoint of the bus. The controller controls the switch unit to be switched off or the impedance of the switch unit to be increased when the voltage of the power grid is smaller than or equal to a first voltage threshold value; and after the switch unit is switched off or the impedance of the switch unit is increased, the modulation wave of each inverter bridge arm is controlled to be the modulation wave after the first common-mode modulation signal is superposed on the initial modulation wave of each inverter bridge arm, so that the amplitude of the modulation wave of each inverter bridge arm is increased. Furthermore, not only can the loss of the switching tube in each inverter bridge arm be balanced, but also the problem of common-mode oscillation caused by modulation wave change can be improved.

The invention provides a low-voltage ride-through control method for a grid-forming type grid-connected converter based on reactive power synchronization, and belongs to the technical field of converter low-voltage ride-through control. When the voltage of a power grid drops, a current amplitude limiting module in the power grid sends a control switching signal to trigger low-voltage ride-through control, and the low-voltage ride-through control is switched to a reactive power synchronization mode; a reactive power synchronous control gain KQs is calculated according to an inner loop gain coefficient Kcp, a current amplitude limiting value, a power grid voltage Vg and a grid side inductance Lgi, a virtual power angle reference value is generated by combining a set reactive power direct current component reference value QN, so that a power angle delta is stabilized in a range close to a normal working point, and a control effect is verified by comparing with a traditional method. According to the method, the system can quickly recover to a normal working state regardless of the duration of the fault and the severity of the fault, meanwhile, the system can effectively work under different power grid fault levels, and the robustness of the system is further enhanced.

The utility model discloses the field of agricultural machinery, and particularly relates to a spraying machine tool and an all-terrain spraying vehicle, the spraying machine tool comprises a hollow shell, a visual identification device and a spraying device are arranged on the two sides of the shell in the width direction respectively, the visual identification device comprises a supporting rod, the supporting rod extends in the height direction of the shell, and the spraying device is arranged on the supporting rod. A camera is arranged at one end of the supporting rod, the other opposite end of the supporting rod is connected with the shell, the spraying device comprises a water pipe, the water pipe extends in the height direction of the shell, a signal control switch valve is arranged on the water pipe, a spraying pipe is connected to the top of the water pipe, and a plurality of nozzles are arranged on the spraying pipe at intervals. According to the utility model, the visual identification device and the spraying device are arranged, and the visual identification device is used for judging whether spraying is carried out or not, so that the pertinence is stronger during spraying, the investment of labor cost can be reduced, the physical and psychological health of staff is greatly maintained, and the spraying device is simple in structure and convenient to popularize.

This application relates to methods and apparatus for switched mode drivers. A BTL driver has a switch network operable in different switch states, wherein, in each switch state, each of first and second output nodes is connected to a respective one of a first switching voltage, a second switching voltage or an intermediate switching voltage between the first and second switching voltages which is provided by a driver capacitance. A controller is configured to control the switch network to operate in a sequence of switch states to generate a differential drive signal based on an input signal. The controller is configured such that operation of driver switch network in said sequence of switch states to generate said differential drive signal provides voltage regulation of the intermediate voltage provided by said driver capacitance.

The invention discloses a hydrogen fuel cell ship power switching system, which relates to the technical field of hydrogen fuel cell ship hybrid power, and comprises a topological optimization module for optimizing a series-parallel topological structure of a fuel cell stack through a quantum annealing algorithm based on a multi-modal data set, the reconfigurable bipolar plate magnetic control switch is triggered to execute millisecond topology switching, and a topology state coding signal is synchronously generated; and the compensation module is used for inputting the topological state coding signal into the LSTM model, predicting a fault risk value, correcting the time step length of a leakage diffusion equation according to the real-time switching frequency of a magnetic control switch, and calculating a ship inclination angle correction term according to the corrected time step length. According to the invention, through an accurate fault prediction and compensation mechanism, operation interruption and maintenance cost caused by unpredictable faults are greatly reduced.

The invention relates to the technical field of digital control switching power supplies, and particularly discloses a switching power supply dynamic response adjusting system based on digital control, which comprises a digital controller, a multi-channel analog-to-digital conversion module, a parameter identification module, a self-adaptive control law adjusting module, a pulse width modulation driving module and a stability monitoring module. On-line identification of key parameters of a system is realized by constructing a nonlinear state space model and combining an extended Kalman filtering algorithm, dynamic compensation is carried out for non-minimum phase characteristics such as a right half plane zero point, and a self-adaptive control law adjustment module optimizes a control strategy in real time according to an updated model. A Lyapunov stability criterion and a predictive control mechanism are introduced, the robustness and response speed of the system are improved, and a stability monitoring module identifies an abnormal state through sliding window variance analysis and peak detection and triggers a fault-tolerant mechanism to guarantee safe operation of the system.

Disclosed in the present invention are a power grid impedance measurement method and apparatus. The method comprises: generating a characteristic harmonic current instruction on the basis of a harmonic-signal generation algorithm, and inputting the characteristic harmonic current instruction into a direct-current voltage feedback control loop; receiving the characteristic harmonic current instruction to generate a control signal, and performing current tracking control to obtain a harmonic current to be injected; converting an information electronic signal of a main circuit into a driving signal in a device control loop, and selecting a preset harmonic injection mode in real time on the basis of a harmonic injection target frequency; when active harmonic injection is selected, controlling the turning-on and turning-off of a switch tube, and injecting said harmonic current into a power grid; when passive harmonic injection is selected, controlling the turning-on and turning-off of an IGBT, controlling a time and a current flow direction of when a capacitor is connected to the power grid for operation, and injecting said harmonic current into the power grid; and selecting voltage and current signals to perform signal decomposition, processing and analysis, so as to obtain a power grid impedance. By means of the present embodiment, a power grid impedance is effectively measured, the disturbance to a power grid during impedance measurement is reduced, and the measurement precision is improved.

The utility model discloses an ear canal embedded hearing aid, which relates to the technical field of medical instruments, and comprises a bearing assembly, the bearing assembly comprises a first packaging shell, a second packaging shell and a filter screen, a signal processing piece and a lithium battery are respectively arranged in the first packaging shell, and the second packaging shell is provided with a second packaging shell. The signal processing piece comprises a signal amplifier, a filter and a central processing unit, and a micro air pump, a control switch, a potentiometer and a microphone are installed on the right side of the first packaging shell. The beneficial effects of the utility model are that through the arrangement of the miniature air pump, the air delivery pipe and the expansion anti-skid assembly, when the ear canals of different users have large differences or need to be worn stably, the miniature air pump can be controlled to work, so that air enters the hollow rubber ring through the air delivery pipe and the delivery pipe, and the hollow rubber ring is gradually expanded to be in contact with the ear wall; therefore, the wearing stability of the bearing assembly is ensured, and the sound definition after conversion of the receiver is ensured.

The invention provides an electrode plate and a tumor electric field treatment system, the electrode plate comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, and the grounding ends of the temperature detection units in each row group are connected to a grounding pin through a control switch. The signal end of each temperature detection unit in each column group is connected to a bidirectional change-over switch through a dual-purpose signal line after being respectively in short circuit with the corresponding electrode unit; when the dual-purpose signal lines are connected to the temperature sampling points, temperature detection signals detected by the corresponding temperature detection units in the corresponding column groups are respectively sampled based on the temperature sampling points by configuring the on-off states of the control switches; when the dual-purpose signal lines are connected to the alternating power lines, alternating electric signals are applied to the electrode units in the corresponding column groups based on the alternating power lines. In this way, a plurality of electrode units can be zoned and controlled using fewer conductive traces.

A foot repair device is provided, which includes a housing, a foot repair device main body, and a functional head. The housing forms a handle, and the handle includes a first handle end and a second handle end. The foot repair device main body is accommodated in the housing and includes a driving motor, a power supply component, and a control component. The functional head is detachably connected to the driving motor, and the control component includes a control circuit board, a switch button, and a speed control dial. The speed control dial adjusts a rotation speed of the functional head by adjusting an output rotation speed of the driving motor. The present disclosure provides a reasonable layout of switch button and speed control dial, allowing a user to easily control the switch and adjust the speed without significantly moving their fingers during operation.

The utility model belongs to the field of elevators, and discloses a safety maintenance device for an elevator, which comprises a safety maintenance plate, an operating mechanism, an upper limit stopper and a lower limit stopper, the upper limit stopper, the safety maintenance plate and the lower limit stopper are sequentially arranged on a guide rail from top to bottom, and the operating mechanism is arranged on a car frame and comprises an operating rod and a support component. And the operating rod is transversely matched with the bracket assembly in a sliding manner. According to the utility model, the upper limiting stopper and the lower limiting stopper are arranged and are matched with each other through the operating rod, so that the stroke protection of the elevator during operation and maintenance is increased, and the control switch assembly can give corresponding warnings when the elevator is in different states, so that the safety of the elevator is improved. And smooth maintenance work is ensured.

The invention discloses a junction temperature testing device and method for a high-electron-mobility transistor. A current measuring module in the junction temperature testing device for the high-electron-mobility transistor is used for acquiring current flowing through a tested device; the power supply module is electrically connected with the other end of the switch module, and the power supply module and the switch module are connected in parallel with the bus capacitor; the control module is electrically connected with the control end, the driving end and the regulation and control end of the switch module, and the control module is used for providing switching signals for the control end, the driving end and the regulation and control end of the switch module so as to control the switching states of the switch protection module, the tested device and the switch module; the heating plate is used for heating a tested device; the temperature detection module is used for measuring the temperature of the detected device; and the waveform analysis module is electrically connected with the control module, the temperature detection module and the current measurement module, and is used for obtaining and forming an experimental oscillogram of the tested device at the temperature according to the temperature, the current and the conduction time of the tested device controlled by the control module.

The invention provides a direct-current group charging control system and a power switching method thereof, and relates to the technical field of electric vehicle charging, and the control system comprises a data interaction controller, a charging module group, a switch module group, a plurality of charging terminals, a direct-current loop module and a direct-current loop controller. According to the method, a data interaction controller controls a switch module group to realize'full matrix 'type dynamic connection between any charging module and any charging terminal according to the real-time requirement of each terminal, and an idle terminal is electrically isolated by combining a direct current loop module; and power switching is carried out by adopting safety strategies such as double-threshold hysteresis control, voltage pre-synchronization and zero-current breaking. According to the invention, the problems of inflexible power scheduling and insufficient idle terminal safety of the existing group charging system are solved, safe, efficient, stable and dynamic distribution of the charging power in a global range is realized, and the utilization rate and the operation safety of the system are improved.

The utility model discloses a lifting net cage device which comprises a culture box body, the culture box body comprises a frame and a netting, a lifting control unit is installed at the position of an arc-shaped pipe body, the lifting control unit is provided with a vertical pipe communicated with the arc-shaped pipe body, the vertical pipe is communicated with a water sealing pipe, the water sealing pipe is provided with a communication channel and a vertical channel, and the communication channel is communicated with the vertical channel. One end of the communication channel is communicated with the vertical pipe, the other end of the communication channel is communicated with the vertical channel, a water seal structure is arranged in the communication channel, an upper exhaust port and a lower drainage port are formed in the vertical channel, a control switch is installed on the water seal pipe, and an air blocking piece is arranged in the water seal pipe and located between the control switch and the upper exhaust port. The part, communicated with the vertical channel, of the communicating channel is located between the air blocking piece and the upper exhaust port. Compared with the prior art, the frame of the structure can enable water inlet, water outlet, air inlet and air outlet to be sufficient when the breeding box body sinks and floats upwards, the phenomenon of free liquid level does not occur, and therefore it is guaranteed that the whole breeding box body sinks and floats stably, and operation is easy.

The invention relates to the technical field of intelligent control, and particularly discloses a servo control method and a servo control system for a fast door, and the method comprises the following steps: a multi-modal data fusion step: collecting a mechanical state, an environment parameter and system health data, and constructing a multi-dimensional state vector; a self-adaptive control step: dynamically generating control parameters based on fuzzy PID and a deep learning model; a multi-stage energy consumption optimization step: switching a control strategy according to the operation stage of the door body, and introducing a regenerative braking and energy efficiency optimization algorithm; and a fault self-healing step: realizing control switching in an abnormal state through sensor redundancy and actuator backup. Compared with traditional single closed-loop control, the positioning precision is improved, and the anti-interference capability is improved through fusion of the mechanical state and the environmental data.

The invention provides a method and a system for improving the self-healing capability of a highway micro-grid in extreme weather, and relates to the technical field of power system automation. The method comprises the following steps: deploying a sensor to collect real-time operation data, and combining meteorological data to generate an integrated system state data set through fusion processing; the digital twin engine generates system state prediction data through state estimation and dynamic simulation; the random multi-objective optimization model solves and generates a preventive scheduling instruction according to the above, and controls a power generation unit, an energy storage unit and a load unit to adjust operation points; fault detection and identification are carried out through residual analysis, a self-healing control instruction sequence is generated by using a sequence decision model, the switch equipment is controlled to isolate faults and restore power supply, closed-loop management from prediction and scheduling to self-healing is realized, and the power supply reliability and rapid recovery capability of the highway microgrid in extreme climate are improved.

A control switch incorporating a 1:2 demultiplexer is used in controlling timing for concurrent switching, break-before-make and make-before-break power multiplexing, and is configurable to link a plurality of the control switches into a control chain to perform sequential charging, sequential discharging, parallel charging, parallel discharging, simultaneous sequential charging and discharging for a plurality of batteries coupled to the control chain in a power system.

A digital controller for a switching converter configured to receive an input voltage and to generate an output voltage, the switching converter comprising one or more power switches and an energy storage element, the digital controller comprising a ripple cancellation signal generator configured to generate a ripple cancellation signal, the digital controller being configured to receive a digitized current signal, the digitized current signal being a digital representation of a current flow through the energy storage element, generate a filtered digital current error signal using the digitized current signal and the ripple cancellation signal, the ripple cancellation signal being arranged to reduce ripple from the digitized current signal in the generation of the filtered digital current error signal, and control the switching converter, the control of the switching converter being dependent on the filtered digital current error signal, wherein the ripple cancellation signal, within each signal period, comprises a rising slope comprising a first non-linear portion, and / or a falling slope comprising a second non-linear portion.

The utility model relates to the technical field of energy storage power supplies, and mainly provides a direct-current power supply fault latch circuit and an energy storage system, the circuit comprises a switch module connected with a battery and a direct-current power supply, a latch module connected with the switch module, and a sampling resistor connected with the latch module, and the sampling resistor is also connected with the negative electrode of the battery and the negative electrode of the direct-current power supply. The switch module is also used for receiving the driving signal. The sampling resistor outputs a sampling voltage to the latch module according to the output current of the cathode of the DC power supply. The latch module is used for controlling the switch module to start working according to the driving signal when the sampling voltage is smaller than the preset voltage so as to output the power supply voltage of the battery to the direct-current power supply; and when the sampling voltage is greater than the preset voltage, it is considered that an overcurrent short circuit fault occurs, and at the moment, a turn-off signal is continuously output to the switch module to close the switch module and lock the closed state, so that output of the power supply voltage is stopped, and the service life of the energy storage system is prolonged while the energy storage system is protected.