3302 results about "Power switching" patented technology

The invention discloses a non-impact grid-connected recovery method, system and device for a coal mine isolated network power supply system and a medium, and belongs to the technical field of non-impact grid-connected recovery of power supply systems, and the method comprises the steps: monitoring the operation state of an isolated network, and obtaining voltage, frequency and phase parameters; preparation before grid connection is executed, and main network parameter confirmation and equipment verification are completed; performing parameter synchronous adjustment based on the controller to complete dynamic matching of voltage, frequency and phase; pre-synchronization control is implemented to realize phase prediction and power pre-balance; executing closing operation and performing impact suppression; carrying out stability regulation and control after grid connection, wherein the stability regulation and control comprise oscillation suppression and smooth load loading; and when grid connection is abnormal or fails, an emergency processing branch is entered, and standby power supply switching or island splitting control is triggered. Through multi-dimensional synchronous control, impedance reconstruction and hierarchical coordination mechanisms, high-precision and low-impact grid connection of multiple energy units under extreme working conditions is realized, and the grid connection stability and success rate of a coal mine isolated network power supply system are remarkably improved.

The invention discloses a power supply switching method, device and equipment, a medium and a program product. The method comprises the following steps: acquiring running state data of a first power supply in real time, and preprocessing the running state data to generate corresponding time sequence data; inputting the time sequence data into a pre-trained LSTM prediction model, the LSTM prediction model being obtained based on sample historical operation data of the power supply and fault sample training, and outputting a fault probability value of the first power supply in a future preset time period; determining whether the first power supply has a fault trend or not according to a relationship between the fault probability value and a preset threshold value; and when the fault trend exists, controlling the first power supply to be disconnected and connecting a second power supply to carry out load power supply switching. According to the scheme, the power supply can be switched to other power supplies before power interruption possibly caused by faults, and the stability and reliability of power supply of related communication equipment are guaranteed.

A power switching device is disclosed. The power switching device includes a cascode switching circuit comprising a normally-on transistor and a normally-off transistor provided in a cascode topology. The power switching device also includes a gate driver circuit configured to apply a positive bias voltage at a respective gate terminal of the normally-on transistor under a normal operating condition, and to apply a negative bias voltage at the respective gate terminal of the normally-on transistor under a short circuit condition.

The invention relates to the technical field of emergency communication, in particular to a Beidou short message-based multi-mode emergency communication terminal, which comprises a Beidou communication module, a multi-source positioning unit, an information coding processor and a main control unit, the Beidou communication module is used for realizing short message communication with a Beidou satellite and supporting a BDS-3 protocol; the physical SOS button is provided with a mistaken touch prevention structure and comprises a mechanical pressing assembly with a triggering pressure threshold value larger than 2N and continuous pressing time verification logic; the multi-source positioning unit is used for acquiring position information including longitude, latitude and height; the information coding processor is configured to compress the collected help-seeking information to be within the capacity limit of a Beidou short message and generate a standard message of an emergency communication protocol; a standby power supply switching circuit is arranged in the main control unit, the main control unit is used for coordinating the work of each module and managing a power supply system, and the power supply system comprises a replaceable lithium thionyl chloride battery and a solar charging panel; and the low-power-consumption main control unit controls the Beidou communication module to transmit information to a Beidou communication satellite.

The invention discloses a positioning and clamping device for automobile part machining, and relates to the technical field of clamping equipment.The positioning and clamping device comprises clamping mechanisms, the clamping mechanisms are distributed and installed on a positioning disc, multiple sets of centering clamping grooves are annularly distributed in the positioning disc, two sets of parallel clamping grooves are further formed in the positioning disc in a penetrating mode, and each clamping mechanism comprises a rotating screw rod; the rotating screw is connected with the driving assembly, a first matching block and a second matching block are arranged at the two ends of the rotating screw respectively, a threaded sleeve is installed on the rotating screw in a meshed mode, a lifting frame is arranged on the threaded sleeve, and a telescopic air cylinder and a clamping assembly are installed on the lifting frame. The rotating screw is controlled to rotate through the telescopic rotating motor and the lifting frame, so that a centering clamping mode and a parallel clamping mode are switched, rapid power switching before and after clamping mode switching is achieved in combination with the power switching mechanism, power system arrangement is optimized, and clamping and positioning of parts of different shapes and different sizes are achieved.

The invention relates to the field of server systems, and discloses a server cabinet system, which comprises a real-time power monitoring module used for collecting server current data at a frequency of once per second, calculating real-time power and dynamically adjusting power distribution; the intelligent prediction and optimization module is used for predicting future demands and generating an optimal distribution strategy based on the normalized historical power consumption data and load data; and the redundant power supply switching module comprises a main power supply and a standby power supply converted by the lithium battery pack through an inverter, and is used for switching to the standby power supply when the voltage of the main power supply is lower than 180V for 10ms. According to the method, the elastic power supply strategy is generated by fusing the prediction demand and the two-dimensional weight of the service priority, the continuous operation of the core service is ensured, the prior art depends on a single priority label to allocate resources, the burst load and the long-term stability are difficult to balance, and the problem of resource waste caused by separation of the two is solved.

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.

A semiconductor die includes an on-die power switch and a target device. The on-die power switch includes a plurality of power input nodes, a power output node, and a switch circuit. The power input nodes receive a plurality of operation voltages from a plurality of different power sources, respectively. The power output node outputs a target operation voltage selected from the operation voltages. The switch circuit selectively couples one of the power input nodes to the power output node. The target device operates according to the target operation voltage supplied from the on-die power switch. The on-die power switch and the target device are separate circuit blocks of the semiconductor die.

An isolated bi-directional DC conversion circuit and a method for controlling the same are provided. The DC conversion circuit includes a transformer with a first energy storage element and a primary-side rectification bridge coupled to the primary side of the transformer and a second energy storage element and a secondary-side rectification bridge coupled to the secondary side of the transformer. The primary-side rectification bridge consists of multiple first power switching devices. The secondary-side rectification bridge consists of multiple second power switching devices. Each of the multiple first and the second power switching devices have a body diode in inverse parallel connection therewith. The DC conversion circuit further includes multiple first sampling resistors provided on each bridge arm of the secondary-side rectification bridge and a controller configured to perform switch control on the multiple second power switching devices based on a sampled voltage of the multiple first sampling resistors.

The invention provides a communication master control system based on intelligent power supply, and relates to the technical field of communication, and the system comprises a power supply monitoring module which is used for monitoring the commercial power supply state of a communication base station, and automatically controlling a power switching circuit to switch a power supply mode to a standby battery power supply mode when the commercial power interruption is detected; the state acquisition module is used for acquiring the charge state, the discharge efficiency and the health state data of the standby battery in real time in a standby battery power supply mode, and acquiring the residual capacity, the actual discharge capacity and the life index of the battery; and the load receiving module is used for uploading the residual capacity, the actual discharge capacity and the life index of the battery to the communication main control unit, and receiving load data in the current communication network at the same time. According to the invention, intelligent scheduling of power utilization is realized, and the power supply reliability and stability of the communication system are improved.

The invention discloses a charging pile power supply switching method and equipment based on a micro-grid, and relates to the technical field of electric vehicle charging, and the method comprises the steps: determining a target user according to a preset price threshold value and a region requirement based on the vehicle information of each vehicle in a target charging station before power supply switching; according to the energy storage state parameter and the power supply quality parameter of the current power supply of the target charging station, judging whether the charging demand of the target user is met; if yes, generating and executing a power supply switching strategy based on a power supply in the energy storage system and the first power supply switching rule; and if the power supply does not meet the preset high-quality power supply switching threshold, determining a standby power supply and a charging power supply, and after the charging power supply supplements energy storage to the standby power supply to a safety threshold, executing switching operation according to a preset switching sequence and an energy storage allocation result. By implementing the application, accurate switching and dynamic adaptation of the power supply can be realized, the problems of blind switching of the power supply and mismatching of the power supply capability and the high demand of the user in the prior art are solved while the resource utilization efficiency is improved, and finally the stability and reliability of switching of the power supply of the charging pile in the micro-grid environment are realized.

Systems and methods for providing an adaptive nut removal mode in a power tool. The power tool includes a housing and a motor. The motor includes a rotor and a stator. The stator includes a plurality of stator windings. A power switching circuit is configured to provide a supply of power from a power source to the motor. An electronic controller is configured to control the power tool to remove a fastener from a joint. The electronic controller is configured to monitor a torque of the motor, determine whether the torque of the motor is equal to or less than a threshold torque value, operate, when the torque is greater than the threshold torque value, the motor in an loosening mode while the torque of the motor decreases, and increase, when the torque is equal to or less than the threshold torque value, a speed of the motor.

The invention relates to the technical field of artificial intelligence, and discloses a charging pile operation state management method and system based on artificial intelligence, and the method comprises the steps: constructing a dual-input single-output DC-DC conversion control circuit structure based on an input power supply, a main power switching device, a three-winding coupling inductor and a switched capacitor unit; calculating a switch time sequence control signal based on a double-input single-output DC-DC conversion control circuit structure; detecting the running state of the charging pile to obtain a multi-dimensional quantized data set, and performing data coding to obtain a standard data information sequence; performing multi-dimensional feature value extraction and fault position identification on the standard data information sequence to obtain a fault positioning result; according to the fault positioning result and the switch time sequence control signal, closed-loop regulation control is carried out on the power device conduction time sequence and the clamping circuit parameters, stable direct-current output voltage is obtained, the voltage conversion efficiency is improved, the accuracy of fault recognition is improved, and the misjudgment rate is reduced.

A station keeping waterfowl system includes at least one self propelled station keeping waterfowl decoy and a homing buoy each having water resistant housings, with at least a portion of the decoy housing having a form of a waterfowl. The decoy and buoy each include batteries, microprocessors, and power switches. The decoy includes a motor driven propeller, a motor driven rudder, and a receiving array of antennae for radio direction finding and radio ranging to the buoy. The receiving array is a T-array of antennae comprising a first transverse linear array and a second longitudinal linear array. The homing buoy emits a homing signal and the one or more waterfowl decoys autonomously navigate to remain within a predetermined radius around the buoy. The system includes a simple handheld controller which preferably comprises no more than two switches or buttons.

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 invention discloses a differential noise traction system and a differential signal noise parameter measurement method and device, and belongs to the field of chip measurement. The system is characterized in that a vector network analyzer comprises four ports, the input ends of two impedance tuners are respectively connected to a differential output port pair of the vector network analyzer, the output ends of the two impedance tuners are respectively connected to the differential input end of a tested device, the differential output end of the tested device is connected to the receiving end of a noise receiver, and the noise receiver is connected to the output end of the noise receiver. The output end of the noise receiver is respectively connected to a differential receiving port pair of the vector network analyzer; the direct-current power supply is used for supplying power to the tested device and the switch controller, and the switch controller is used for controlling an internal switch of the noise receiver; the differential output port pair generates a differential signal; the differential receiving port pair is used for receiving noise power of a differential signal; and the impedance tuner is used for adjusting the impedance point, so that the differential signals input to the tested device correspond to different differential impedances. The method can improve the measurement precision.

The invention discloses a control method and system based on transient impact suppression in main and auxiliary power switching, and relates to the technical field of ship power system.The method comprises the steps that dynamic parameters of a ship main and auxiliary power system are collected in real time through a multi-source sensor, transient feature extraction and correlation analysis are carried out on the dynamic parameters, and transient impact suppression is carried out on the dynamic parameters; constructing a multi-dimensional impact feature library containing an impact strength quantized value, a power sudden change gradient and an energy compensation demand; and based on the impact feature library, generating a hybrid energy storage cooperative control instruction set through a dynamic weight distribution algorithm, executing a staged transient suppression control sequence in a preset time window, and executing the staged transient suppression control sequence in the preset time window. According to the control method and system based on transient impact suppression in main and auxiliary power switching, stable operation of a ship power system is guaranteed, and meanwhile the service life of equipment is prolonged.

A communication system includes a first controller and a second controller connected to each other. The first controller receives electric power from a power source through a power switch. The second controller includes a current detection unit, the management frame obtaining unit, the disconnection determination unit, and the power supply disconnection unit. The current detection unit detects a consumed current value of the first controller. The management frame obtaining unit obtains a management frame including activation information of the first controller. The disconnection determination unit determines, based on the consumed current value and the activation information, whether a predetermined disconnection condition is met. The power supply disconnection unit switches the power switch to a disconnected state when the disconnection determination unit determines that the disconnection condition is met.

The invention belongs to the technical field of inverters, and provides a three-level quasi-fixed-frequency hysteresis comparison inverter and a control method thereof, and the inverter comprises an inverter bridge, a filter inductor and a current transformer which are connected in sequence. Wherein the inverter bridge is arranged between the upper direct-current bus and the lower direct-current bus and adopts a three-phase bridge type structure, each phase bridge type structure at least comprises four power switch tubes and two diodes, a first voltage stabilizing capacitor is arranged between the upper direct-current bus and the midpoint of the inverter bridge, and a second voltage stabilizing capacitor is arranged between the lower direct-current bus and the midpoint of the inverter bridge. A second voltage stabilizing capacitor is arranged between the lower direct current bus and the midpoint of the inverter bridge; a driving unit, a driving control unit, a phase change ring width hysteresis comparator and a ring width calculator which correspond to each phase of bridge type structure are arranged between the inverter bridge and the current transformer, and an inverter output voltage detection unit is arranged between the ring width calculator and the filter inductor. And an inverter output current detection unit is arranged between the phase change ring width hysteresis comparator and the current transformer.

The invention discloses a mining small-sized anti-vibration trepanning directional measurement device and method. The mining small-sized anti-vibration trepanning directional measurement device comprises a battery module, a measurement module, a vibration reduction module, a display module, a power switch and a charging interface, the measurement module comprises an MEMS gyroscope, an MEMS accelerometer, a conductive slip ring, a servo mechanism, an IMU module, a main control board, a motor control board and an external interface connector. Based on the high-precision small-size MEMS gyroscope, the MEMS accelerometer and the integrated small IMU, the equipment size is reduced, the cost is reduced, and the power consumption of the whole machine is reduced; through a four-position north-seeking method, the measurement time is shortened, and high-precision autonomous orientation is realized; based on an integrated small IMU, the tapping direction is updated in real time through quaternion calculation, and dynamic tracking measurement is achieved in the drilling machine adjusting process; according to the vibration reduction module and the vibration reduction method, the vibration resistance problem of an MEMS device is solved, the data quality of an MEMS gyroscope and an MEMS accelerometer is improved, vibration reduction filtering in the tracking process is achieved, and the equipment orientation precision is improved.

The utility model relates to the technical field of relay verification, in particular to a portable time relay verification circuit and device. Comprising a timer, a first intermediate relay, a second intermediate relay, a first selection switch, a second selection switch, a third selection switch, a direct current voltmeter, a power switch, a start button, a reset button, a power indicating lamp and a power module. According to the utility model, through different combinations of the three selection switches, verification of eight different types of time relays is realized by using the two intermediate relays, the structure is simple, the integration is good, the cost is low, and the verification capability of the time relay during the ship navigation period is improved.

The invention discloses a self-adaptive cable grounding resistance detector and a self-checking method, the self-adaptive cable grounding resistance detector comprises a shell, the shell is provided with an indicating lamp, a charging socket, a power switch and a single-ended grounding and cross-connected wiring socket, the shell is internally provided with a main control unit, and the algorithm of the main control unit has functions of function calibration, compensation calibration, power supply self-checking and the like. The main control unit is integrated on a circuit board, and can adapt to various grounding detections without replacing hardware by controlling automatic switching of a relay, so that the universality and the economical efficiency are improved. The device is controlled by an integrated circuit chip, has high precision and high environmental adaptability, and is suitable for single-end grounding and cross interconnection grounding resistance detection of a high-voltage cable. According to the invention, the self-checking process is completed before starting up, and through pulse current and standard resistance simulation detection, the measurement accuracy is improved, and personal errors are reduced.

The invention discloses an intelligent altitude-adaptive pressure swing adsorption oxygen generator and a control method thereof.The intelligent altitude-adaptive pressure swing adsorption oxygen generator comprises a shell, an oil-free compressor is arranged in the shell and connected with an electromagnetic switching valve through a pipeline, and the electromagnetic switching valve is connected with a double-molecular-sieve adsorption tower through a pipeline; the double-molecular sieve adsorption tower is connected with the oxygen storage tank through a pipeline, an output port is formed in one side of the oxygen storage tank, a main control board is arranged in the shell, a control panel is arranged on the outer surface of the shell, a power switch is arranged on the control panel, and a pressure sensor, an altitude sensor and a CPU processing center are arranged on the main control board; according to the altitude sensor technology, the altitude of the working environment of the oxygenerator is intelligently identified, and the parameter configuration of the oxygenerator is automatically adjusted to correspondingly match the current altitude, so that the oxygenerator can generate oxygen with the concentration meeting the standard requirement at each altitude.

The invention relates to a charger, a charger control method and a vehicle. The charger comprises a magnetic integrated transformer, an AC-side single-stage conversion circuit, a high-voltage-side conversion circuit and a low-voltage-side conversion circuit. The first end of the alternating-current side single-stage conversion circuit is connected with an alternating-current side, and the second end is connected with a primary winding of the magnetic integrated transformer; the first end of the high-voltage side conversion circuit is connected with a high-voltage secondary winding of the magnetic integrated transformer, and the second end is connected with a power battery; the first end of the low-voltage side conversion circuit is connected with the low-voltage secondary winding of the magnetic integrated transformer, and the second end is connected with a low-voltage system. A power factor correction function can be realized through the alternating current side single-stage conversion circuit, a power factor correction circuit and a bus electrolytic capacitor can be omitted at the same time, and the service life of the charger is prolonged. In addition, the high-voltage side conversion circuit and the low-voltage side conversion circuit share one magnetic integrated transformer, so that the size of the charger is reduced, the consumption of power switch devices is reduced, and the cost and the highest power density are reduced to the maximum extent.

The invention belongs to the technical field of aircraft control, particularly relates to a range extender control system for an unmanned aerial vehicle and a controller, and aims to solve the problems of limited endurance, poor flight stability and the like caused by discontinuous energy supply and power response lag. The system comprises a range extender power source module, an electric energy conversion and distribution module, a flight state sensing module, a load power prediction module, a multi-target optimization scheduling module and a closed-loop feedback execution module. Through flight state real-time perception and load power prediction based on a recurrent neural network, an optimal power generation instruction is generated in combination with multi-target optimization scheduling, and precise rotating speed tracking is realized through adaptive PID control. A fuel consumption, power supply smooth switching and battery health combined cost function is introduced, dynamic weighting is carried out according to task types, and the cruising ability and the system robustness are improved; the system has the functions of fault emergency response, power battery hot plug and model online updating, and safety and maintainability are enhanced.

A power tool is provided including: a tool housing; a motor disposed within the tool housing; a battery receptacle arranged to be coupled to a battery pack having a rated capacity; a power switch circuit disposed between the battery receptacle and the motor; and a controller that controls the power switch circuit to drive the motor. The controller is configured to: determine or receive a pack ID associated with the rated capacity of the battery pack; set a braking profile for electronically braking the motor based on the pack ID; and apply an electronic brake to the motor in accordance with the set braking profile upon detection of an event associated with stoppage of the motor.

The invention discloses a user side reactive compensation optimization control method and system based on machine learning, and the method comprises the steps: obtaining the operation historical data of a power distribution network, carrying out the preprocessing, and constructing a data set; training and verifying a capacitor switching quantity prediction machine learning model by using the data set; constructing a multi-objective loss function based on the capacitive reactive switching amount, the power factor and the voltage amplitude; constructing an objective function for a prediction result of the trained capacitor switching amount prediction machine learning model, and performing optimization to obtain an optimization result; adding a hard constraint condition to an optimization result, and forcing the output of the model to be within a set range; and the capacitor switching amount prediction machine learning model deployed behind the embedded device performs online learning according to the real-time data. According to the method, multiple targets of self-adaptive compensation decision making, synchronous optimization of power factors, voltage stability, equipment service life and the like in a dynamic scene can be realized, and the reactive compensation effect is effectively improved.

The invention discloses an intelligent guarantee control system and method for a floating type wind turbine generator, and the system comprises a mains supply, a diesel generator, a dual-power switch cabinet, a battery cabinet unit, a time relay group, a redundancy module, at least two lubricating pump units, at least two oil supplementing pump units, a light storage unit, a satellite communication system, a switch, and a control system PLC. The mains supply and the diesel generator are electrically connected with the battery cabinet unit through the dual-power switch cabinet, the diesel generator is in communication connection with the switch and the main PLC of the unit, and the optical storage unit, the lubricating pump unit and the main PLC are electrically connected with the battery cabinet unit. The oil supplementing pump unit, the satellite communication system, the switch, the control system PLC and other power taking devices of the unit are electrically connected with the light storage unit through the time relay set, and the time relay set selects the light storage unit or the battery cabinet unit to supply power through the redundancy module. According to the invention, the problems of power supply and unit state information transmission during construction periods of towing, in-place mooring installation, ballast diving and the like of the unit are solved.

A first switch circuit provided between a first control circuit and a first power supply interrupts supply of a first voltage to the first control circuit in a case where a voltage drop of the first voltage is equal to or greater than a threshold, a second switch circuit connected to a communication line used for communication between the first power supply and a second control circuit interrupts supply of the first voltage to the communication line in a case where the voltage drop of the first voltage is equal to or greater than a threshold, and a power supply switch circuit connected to the first control circuit and the communication line switches a supply source of a power supply voltage to the first control circuit from the first power supply to the second power supply.

The invention discloses a rectification feedback control method and system. The method comprises the following steps: acquiring a power grid voltage and an inversion output current, and obtaining an active current through phase locking and coordinate transformation; whether feedback is started or not is determined by judging whether id is lower than a first threshold value or not, if yes, a driving signal is generated according to the phase of the power grid, a power switch device in the rectification feedback unit is conducted, and energy is fed back to the power grid; if id is higher than the second threshold value, the unit is turned off. According to the method, by detecting the energy flow direction in real time, self-adaptive on-demand switching of the rectification feedback unit is achieved, unnecessary switching actions of a power device are effectively reduced, switching loss and the aging speed of the device are reduced, and therefore system efficiency and reliability are improved, the service life of the device is prolonged, and energy waste is avoided.