1097 results about "Current transducer" patented technology

The invention relates to the technical field of motor fault diagnosis, in particular to a motor fault diagnosis algorithm based on multi-sensor fusion, and the algorithm comprises the steps: injecting a step excitation signal into a motor, synchronously collecting the original response waveforms of vibration and current sensors, and calculating the inherent response delay. Establishing a mapping relation library of delay values and current sensor filtering parameters, calling the delay values in real time according to the filtering parameters, performing reverse time offset compensation on a current harmonic signal time sequence, performing time alignment on the two types of data, finally performing cross-domain coupling analysis on the aligned data, extracting vibration pulse peak frequency and current harmonic fluctuation quantity, and determining the vibration pulse peak frequency and the current harmonic fluctuation quantity. Early faults are judged by combining the bearing outer ring fault characteristic frequency band and the load rate dynamic threshold value, graded alarm is generated by tracking characteristics, the problem of fault false judgment and missed judgment caused by sensor data space-time dislocation is solved, and the early fault diagnosis accuracy of the motor is improved.

According to the cable multi-parameter fusion sensor and method, in the cable multi-parameter fusion sensor, a shielding shell is of an open-close type metal annular structure; the zero-flux sensor module is arranged on the inner layer of the shielding shell so as to detect a cable sheath ring current signal; the pulse current sensor module is arranged on the outer side of the zero-flux sensor module so as to detect a cable partial discharge pulse current signal and an overvoltage impact current signal; the magnetic shielding layer is arranged between the zero-flux sensor module and the pulse current sensor module to shield low-frequency magnetic field interference; the zero magnetic flux sensor module and the pulse current sensor module share the shielding shell to form an electromagnetic shielding structure.

The invention relates to a current sensor chip packaging structure and a packaging method. The current sensor chip packaging structure comprises a bus frame and a chip which are packaged through a plastic package body, the side, provided with the chip bonding pad, of the chip is defined as the front face of the chip, only one side of the front face is configured to be opposite to the back face of the bus frame, the chip bonding pad is arranged on the other side, extending out of the bus frame, of the front face, and a sensor element is arranged on the side, right opposite to the bus frame, of the front face of the chip. A gap between the chip and the bus frame is provided with an isolation layer, and the front surface is connected to the back surface of the bus frame through the isolation layer. According to the current sensor chip packaging structure and the packaging method, the front surface of the chip is connected to the back surface of the bus frame through the isolation layer, and the sensor element is arranged at the position opposite to the front surface of the chip, so that the distance between the sensor element and the bus frame is minimized, and the reliability of the current sensor chip is improved by minimizing the distance between the sensor element and the bus frame. Sensitivity and measurement precision of the sensor are remarkably improved, and the problems of reduction of isolation voltage endurance capability and process fluctuation are avoided.

The invention relates to the technical field of driving control of symmetrical vacuum pressure control valves, in particular to a zero-point-free zero returning method of a double-position synchronous motor for a symmetrical vacuum pressure control valve, which is suitable for scenes needing high-precision pressure control, such as semiconductor manufacturing, vacuum coating, precision vacuum detection and the like. The problems that in the prior art, the vacuum sealing performance is damaged by depending on a special sensor, cost is high, abrasion of a sealing ring is aggravated due to zero point fixation, and double-shaft synchronization precision and load distribution are disjointed are solved. According to the method, the position where the sealing ring reaches the sealing pre-tightening force serves as a dynamic non-fixed zero point, an additional zero point sensor or a collision sensor or a horizontal sensor is not needed, the current-torque coupling characteristic of a motor is utilized, and full-process automatic control is achieved through a high-precision Hall current sensor and an incremental encoder. The method comprises the following specific steps: initializing motor parameters, establishing a T = K * I mapping relation, calibrating a current overload threshold value, calibrating a current detection module, synchronously starting and operating double motor shafts, identifying a collision state based on current detection, locking and verifying a zero returning position, and judging zero point uniqueness based on torque uniformity. The double-shaft zero returning repetition precision is high, zero point uniqueness judgment fits the actual working condition, uneven abrasion of the sealing ring can be reduced, the service life of the sealing ring and the maintenance period of the valve are prolonged, meanwhile, the equipment manufacturing cost and the maintenance difficulty are reduced, and the vacuum sealing stability and the pressure control precision of the symmetric vacuum pressure control valve are effectively improved.

The invention discloses a super-fusion pole-mounted switch device, belongs to the technical field of switch devices, and discloses the super-fusion pole-mounted switch device which comprises a switch body, a power taking unit and a feeder terminal. The switch body comprises a deep fusion solid-sealed polar pole which is integrally poured, a vacuum arc extinguish chamber, an isolating switch contact and a voltage and current sensor are integrated in the switch body, and the electricity taking unit supplies power to the deep fusion solid-sealed polar pole through a separable spring electric contact structure; the feeder terminal is embedded in the switch box body and is operated in a hot-line mode through a special operating rod. The invention further provides a transient electromagnetic interference suppression module which is used for eliminating electromagnetic interference in the equipment. The CLC topological power taking unit can adapt to multiple working conditions; the state monitoring module is fused with multi-source data to diagnose faults, and the problems that an existing primary and secondary fusion column switch is low in fusion degree, weak in anti-electromagnetic interference, poor in electricity taking reliability and low in intelligence are solved. The equipment can supply power to the 10kV power distribution network intelligently, the reliability is improved, and the operation and maintenance cost is reduced.

A non-isolated bidirectional high-voltage direct current battery charger is made compatible with a ground-fault circuit interrupter (GFCI) at the DC output by adapting the power converter to control, in response to voltage or current sensors, a net current difference between forward current and return current to remain below a threshold of the GFCI. This can be done without compromising safety in the case of actual ground faults.

The utility model relates to the technical field of filament detection equipment, and discloses a vehicle H7 bulb filament detection mechanism, which comprises a working platform, and a tray is arranged at the top end of the working platform. According to the vehicle H-shaped bulb filament detection mechanism, due to the design of a second air cylinder and a first air claw, a plurality of bulbs can be accurately clamped and conveyed into a moving block, due to the design of a first air cylinder, the bulbs on the moving block can be sequentially aligned with the second air claw, and due to the fact that the second air claw is provided with two grippers, the bulbs can be accurately clamped and conveyed into the moving block. Due to the design of the power-on detection module and the current sensor, power-on detection can be conducted on the bulbs, and when lamp filaments of the bulbs break down, the current sensor stops the device and gives an alarm to attract attention of operators. And due to the design of the camera and the illuminating lamp, the lamp filament can be photographed and detected, so that the bulb can be efficiently and accurately detected.

The invention discloses a car coupler state detection and execution control circuit and a car coupler automatic picking and hanging system and method, and relates to the technical field of railway vehicle automation control, and the car coupler state detection and execution control circuit comprises a state detection unit which comprises a plurality of non-contact sensors arranged at different detection positions of a car coupler; the safety execution unit comprises a 2oo2 interlocking structure formed by a first relay and a second relay which are connected in series, a through-type Hall current sensor arranged on a main loop between the first relay and the second relay, and a third relay for controlling the extension and retraction directions of an electric push rod; the power supply management unit comprises a 24VDC power supply input terminal, a fuse, a reverse connection protection diode and a surge suppression TVS (Transient Voltage Suppressor) tube; wherein the output end of the state detection unit is connected to the input port of the controller, and the output port of the controller is connected to the control end of the safety execution unit. The safety of the system is improved through a hardware-level redundant architecture, and the reliability of coupler state detection is improved through multi-sensor fusion.

The invention provides a three-phase low-voltage MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) packaging integrated power module. A driving assembly, a direct-current bus capacitor and other modules are integrated in an aluminum shell package. The three DBC substrates respectively bear U-phase bridge arms, V-phase bridge arms and W-phase bridge arms, an upper bridge arm and a lower bridge arm of each phase are formed by a plurality of parallel MOSFET chips, drain electrodes of the chips are directly welded to a DBC upper copper layer, grid electrodes of the chips are connected with an upper-layer driving circuit board through copper columns, source electrodes of the chips are led out to a direct-current input terminal or an alternating-current output terminal through bonding wires, and a double-layer conductive structure is formed. A plurality of direct-current bus capacitors which are arranged above the aluminum shell in parallel are adjacently coupled with the DBC substrate, so that low-impedance energy buffering is realized; the alternating current output terminal is sleeved on the current sensor, detects the phase current and outputs the phase current through the signal terminal; and a thermistor is mounted on a copper layer on each DBC to monitor the junction temperature of the chip and provide over-temperature protection. The direct-current input terminal, the alternating-current output terminal, the power terminal and the signal terminal are integrally embedded in the aluminum shell and are directly butted with an external busbar and a controller, and additional sampling and driving boards are not needed.

The invention requests to protect a multi-sensor fusion adaptive motion control system and method for a boat-type lotus root harvester, and the system comprises a multi-sensor array which is used for obtaining the position, posture, speed, inclination angle and motor load information of the lotus root harvester, and comprises a GPS, an IMU, a current sensor and an encoder; the microcontroller is used for running an extended Kalman filter (EKF) data fusion algorithm, a multi-mode PID self-adaptive control algorithm, a pure tracking path planning algorithm and a nonlinear model prediction control algorithm, and comprehensively considering path tracking precision, control smoothness and multiple constraint conditions in a prediction time domain through a rolling time domain optimization strategy; generating an optimal control instruction according to the state estimation; the executing mechanism comprises a walking motor and a steering engine and is used for responding to the control instruction and driving the lotus root harvester to move; the invention discloses a Simulink hardware-in-the-loop verification system.

The invention relates to the technical field of power system energy storage equipment testing, in particular to a small and medium-sized industrial and commercial energy storage cabinet twin-trawling testing system which comprises a main loop, a secondary control loop and an anti-countercurrent detection unit, the main loop comprises double testing loops and four sets of alternating current contactors, and multi-machine twin-trawling testing frameworks such as one-to-one, one-trawling-two and one-trawling-three can be flexibly combined; independent switching between grid connection and grid disconnection is supported, the secondary control loop comprises a button with a lamp and a grouping reset button, and the countercurrent prevention detection unit detects the energy flow direction in real time through an intelligent electric meter and a current sensor and has a mains supply charging function. According to the test system, through a double-loop parallel test architecture and a multi-machine flexible combination design, the system can be synchronously butted with multiple energy storage cabinets to carry out parallel test, the test efficiency can be improved, and a safety system with anti-countercurrent detection, rapid mode switching and precise control protection guarantees the test safety; the arrangement of the standardized terminal and the button with the lamp simplifies the operation difficulty, and reduces the test threshold.

The invention provides a temperature drift compensation method, device and equipment for a Hall current sensor, and relates to the technical field of Hall sensors. The method is applied to a temperature excursion compensation system, the temperature excursion compensation system comprises a temperature sensor, a microprocessor, a temperature excursion prediction model, a compensation signal generation module and a differential amplification circuit, and the temperature excursion compensation method comprises the following steps: acquiring environment temperature data of a Hall current sensor by using the temperature sensor; the microprocessor calculates a temperature drift error parameter corresponding to the current environment temperature data based on the environment temperature data and a temperature drift prediction model; the compensation signal generation module generates a corresponding compensation signal based on the temperature drift error parameter, and the compensation signal and the temperature drift error represented by the temperature drift error parameter are equal in size and opposite in direction; and superposing the compensation signal and an original sampling signal of the Hall current sensor through a differential amplification circuit to obtain a final current signal. The measurement accuracy of the Hall current sensor can be improved.

A circuit breaker protects an electrical low-voltage circuit. The circuit breaker has a housing with first and second connections on the mains side and first and second connections on the load side, and an isolating contact unit connected to an electronic interrupting unit. The isolating contact unit can be switched by opening contacts to prevent current flow or by closing contacts for current flow in the low-voltage circuit. The electronic interrupting unit is switched by semiconductor-based switching elements into a high-impedance state for preventing the current flow or into a low-impedance state of the switching elements for the current flow in the low-voltage circuit. A current sensor determines the level of the current of the low-voltage circuit. A controller is connected to the current sensor, the isolating contact unit and the electronic interrupt unit, such that a first measuring impedance is provided between the first and the second load-side connection.

The invention discloses an intelligent regulation and control system and method for a clutch of forging and pressing equipment, and the system comprises a current sensor group which is used for collecting the waveform data of the three-phase current of a clutch drive motor in real time; the feature extraction module is used for extracting waveform features from the waveform data, and the waveform features comprise harmonic distortion rate, phase offset and instantaneous power fluctuation characteristics; the time sequence prediction module is used for predicting the future change trend of the clutch engagement state based on the historical waveform characteristics; the controller is used for generating a regulation and control instruction according to the prediction result, and the regulation and control instruction comprises at least one of joint time adjustment, motor torque compensation and lubrication control; and according to the prediction result and characteristic parameter correlation analysis, dynamically generating instructions such as joint time adjustment, motor torque compensation and lubrication control, optimizing the running state of the clutch in real time, reducing abnormal vibration of the equipment, and meeting the requirements of real-time monitoring and dynamic regulation and control of the forging and pressing equipment clutch.

An alternating current (AC) motor system includes an AC motor with a rotor and a stator with multi-phase AC stator windings. The system also includes a power inverter that generates a multi-phase AC voltage, an AC bus that connects the power inverter to the stator windings, an AC choke that surrounds the AC bus, and a current sensor with a coil wound on or surrounded by the AC choke. The current sensor measures common mode current in the AC bus, and is used in pulse width modulation or slew rate control of the power inverter, ensuring smooth operation and reducing the risk of damage due to common mode current.

The invention relates to the technical field of power electronics and battery management, and provides a mobile power adapter and a dynamic power distribution and safety monitoring method thereof. The method comprises the following steps: acquiring the connection state of an external power supply, if the external power supply is detected to be connected, entering an adapter mode, and supplying power to equipment by a lithium battery pack through a bidirectional DC-DC conversion circuit; in the adapter mode, load data of an equipment charging channel, a self battery charging channel and two independent output interfaces are monitored in real time through a power sensor, and the electric quantity of equipment, the electric quantity of a lithium battery pack and the power of an external power supply are obtained; running data of a lithium battery pack and an output interface are collected in real time through a built-in temperature sensor, a built-in voltage sensor and a built-in current sensor, and the risks of over-charging, over-discharging, short circuit and overheating are detected in real time in combination with an abnormal state recognition algorithm; periodically detecting the internal resistance of the lithium battery pack, judging the aging degree of the battery according to the change of the internal resistance, and dynamically reducing the charging current based on the aging degree of the battery.

The invention discloses a locked-rotor current self-protection system of an automobile seat motor, and relates to the technical field of locked-rotor protection of automobile seat motors. Comprising a current sensor module which is used for collecting a working current signal of a motor; the signal conditioning circuit module processes a signal output from the current sensor, amplifies a weak signal based on an amplifier, and removes a high-frequency noise component based on a low-pass filter; and the microcontroller module is used for receiving the digital signal from the signal conditioning circuit and analyzing and processing the data according to a preset program algorithm. According to the method, the locked-rotor state is judged by adopting double indexes based on the current change rate and the absolute value, and compared with a traditional single threshold value method, the method has higher accuracy and reliability; the transient current fluctuation influence caused by high current impact at the starting moment of the motor and other non-locked-rotor factors is avoided, and the false alarm rate is effectively reduced.

According to the mechanical direct-current circuit breaker based on the variable inductor and the method, in the circuit breaker, a switch branch comprises a vacuum switch VB and a current sensor which are connected in series; the reverse injection branch is connected in parallel to the two ends of the vacuum switch VB, comprises a pre-charging capacitor, a discharging thyristor, a multi-stage series inductor and a parallel thyristor module, and is selectively connected in series with the multi-stage series inductor according to the detected fault current so as to realize variable inductance; a reverse injection current is formed to realize current zero passage and arc quenching of the VB fracture of the vacuum switch; the energy consumption branch is connected in parallel to two ends of the vacuum switch VB and is used for dissipating residual energy in the loop after the mechanical direct current circuit breaker is switched off; the controller is connected with the current sensor and the thyristors and used for judging the number of inductors needing to be input according to the rise rate and amplitude of fault current and controlling the corresponding thyristors to be switched on, and graded inductor series-in and reverse current injection of the multi-stage series inductors of the variable inductor are achieved.

A trailer light monitoring module is configured to electrically couple with lights on a trailer and include an input configured to receive electrical power from a battery; an output configured to electrically couple with lights on a trailer and selectively communicate the electrical power from the battery; a learning button, the activation of which determines a quantity of possible channels through which trailer lights could receive electrical power, and also determines how many of the quantity of possible channels actually receive electrical power; and a plurality of channel diagnostic blocks each including a tunable current sensor having a variable resistor that is tunable based on an output voltage received.

The invention discloses a shipyard welding process quality whole-process intelligent management and control system. The system comprises an edge sensing module, a cloud decision module, a block chain tracing module and a real-time interaction module, the edge sensing module comprises a current sensor, a vibration sensor and a micro spectrometer, is internally provided with a multi-modal data preprocessing unit and is used for executing filtering, noise reduction and normalization operation, collecting multi-physical field data in the welding process and capturing welding machine body recession characteristics and welding quality data in real time; and the cloud decision module comprises an equipment health state evaluation unit which is used for deploying a federated learning model and a reinforcement learning agent, outputting an optimal process parameter and feeding back a feature weight optimization instruction to the edge sensing module so as to realize process dynamic optimization and quality closed-loop control. The method can effectively solve the problems that in the prior art, an equipment degradation prediction model is disjointed with an actual working condition, process optimization lacks mechanism-driven closed-loop verification, and data islands and decision models are fragmented.

The invention discloses a biomass new energy manufacturing PLC integrated control system, which comprises a PLC main control unit, a touch screen operation interface, a sensor system, a frequency converter, a protection device and an actuator, and is characterized in that the PLC main control unit accurately controls each link through data acquisition and processing, the touch screen is used for real-time interaction with an operator, and the sensor system is used for monitoring the operation of the operator. The sensor system comprises a temperature sensor, a pressure sensor, a flow sensor and a current sensor and can monitor the equipment state in the production process in real time. By integrating a plurality of hardware devices such as the PLC, the touch screen and the temperature and humidity sensor, centralized control in the biomass energy production process is realized. The time delay and coordination problems caused by decentralized control can be effectively reduced, the operation efficiency of the system is improved, and real-time data acquisition, data processing and feedback control technologies are adopted. The system can automatically monitor equipment states, such as temperature, pressure, flow, rotating speed and the like, optimizes the production process through a PID (Proportion Integration Differentiation) adjustment algorithm, and realizes intelligentization and automation of production links.

The application discloses a kind of on-load tap-changer monitoring devices, methods, equipment and storage medium, the device includes position sensor, current sensor and information acquisition processor, position sensor is set to the transmission assembly of on-load tap-changer, for detecting the action information of on-load tap-changer switching knife switch, current sensor is set to the power electronic component of on-load tap-changer and the loop of switching switch, for detecting the current information of the power electronic component, information acquisition processor is used to receive action information and current information, and action information and current information are exported.The on-load tap-changer monitoring device of the embodiment of the application can monitor the action information of switching knife switch and the current information of power electronic component in real time by installing position sensor on transmission assembly, setting current sensor in the loop of power electronic component and switching switch, installation position is reasonable, and it is convenient to monitor on-load tap-changer internal information.

A processing circuit that processes a detection signal detected by a sensor element includes a main circuit that generates an output signal in response to the detection signal, an alternative circuit that generates an alternative signal in response to the value of the detection signal at a timing different from that of the output signal, a noise detection unit that outputs a noise signal that indicates the presence or absence of noise in the detection signal, and a selection unit that selects and outputs either the output signal or the alternative signal in response to the noise signal, and the selection unit outputs the alternative signal for a period longer than the noise detection period.

A battery system includes a battery pack including a plurality of battery cells, a voltage sensor that detects a voltage of each of the battery cells, a current sensor that detects a current flowing through each of the battery cells, a fan that cools the battery pack by feeding air to the battery pack, and a control device for controlling air volume of the fan so as to match a target air volume. The control device calculates internal resistance of each of the battery cells based on detection values of the voltage sensor and the current sensor. When the internal resistance of any one battery cell of the battery cells exceeds a threshold value, the control device increases the target air volume as compared with when the internal resistances of the battery cells are all lower than the threshold value.

The utility model discloses a detection tool and a detection system, relates to the technical field of batteries, and can solve the technical problems that the test efficiency is low, and the full detection requirement of a current sensor cannot be met within limited production time in the prior art. The detection tool comprises a base, a plurality of connecting assemblies and a power supply assembly. The base comprises a detection circuit. The plurality of connecting assemblies are arranged on the base, the plurality of connecting assemblies are electrically connected with the detection circuit, the connecting assemblies are in one-to-one correspondence with the current sensors, each connecting assembly comprises a positioning part and a power connection part, the positioning parts are used for positioning the current sensors, and the power connection parts are used for being electrically connected with the contact pins; the power supply assembly is arranged on the base and used for supplying power to the multiple current sensors installed on the multiple connecting assemblies.

A circuit breaker protecting an electric low-voltage circuit includes a housing with grid-side and load-side connections and a series circuit of a mechanical isolating contact unit on the grid side and an electronic interruption unit on the load side. The mechanical isolating contact unit has a handle opening and closing contacts. A current sensor unit is disposed in a conductor between the isolating contact unit and the interruption unit, for ascertaining a current level of the low-voltage circuit. A control unit is connected to the current sensor unit, electronic interruption unit, and mechanical isolating contact unit. When current and / or current / time thresholds are exceeded, prevention of a current flow in the low-voltage circuit is initiated. A power supply unit supplying energy to the circuit breaker is connected to conductors of the low-voltage circuit between the isolating contact unit and the interruption unit.

The invention relates to a vehicle drive device. Disclosed is a driving device for a vehicle, comprising: a stator; a winding excitation rotor around which a coil is wound; a power supply device which is provided between a power source and the winding excitation rotor and supplies power to the winding excitation rotor in a non-contact manner; and a non-contact current sensor, the power supply device comprising: a fixed-side first substrate having a power supply circuit unit electrically connected to a power source; and a second substrate that has a power receiving circuit unit electrically connected to the coil, is disposed so as to face the first substrate, and rotates integrally with the winding excitation rotor, and the non-contact current sensor is disposed on the first substrate.

The present embodiments relate to an electric current sensor, a steering control device, and a method for detecting an electric current. An electric current sensor may comprise: a conductive part through which an electric current flows; a detection unit for detecting a magnetic field generated by the electric current flowing through the conductive part; a first generation unit for generating a first electric current sensing value on the basis of the resistance included in the conductive part; and a second generation unit for generating a second electric current sensing value on the basis of the magnetic field detected through the detection unit.

A vacuum cleaner according to one embodiment of the present invention is characterized in that whether to output a cleaning cloth replacement signal notifying about the replacement of a cleaning cloth is determined on the basis of the value of a mop motor (182) current measured by a current sensor.

The invention relates to an energy storage converter, an energy storage system and electric equipment, and relates to the technical field of energy storage. The energy storage converter comprises a box body, a support and a Hall current sensor, the support comprises a bearing structure and a fool-proof structure which are connected, the bearing structure is connected with the box body, the fool-proof structure comprises a second fool-proof part, the Hall current sensor comprises a first structure and a second structure, the first structure is detachably connected with the bearing structure, and the first structure is provided with a detection hole. The second structure is provided with a wire plugging port, the first structure comprises a third surface and a fourth surface which are opposite in the plugging direction of the wire plugging port, and the second fool-proof part is located on the side, opposite to the fourth surface, of the third surface. The energy storage converter has a good fool-proof installation effect in the aspect of installation of the Hall current sensor so as to ensure that the installation direction of the Hall current sensor is correct.