570 results about "Current threshold" patented technology

The invention discloses a full-working-condition driving force optimal distribution control method based on an HCU, and relates to the technical field of new energy automobile control, and the method comprises the following steps: building a long slope energy flux analysis model, generating a time sequence envelope curve of recovery power based on a slope, an automobile speed and a wheel end inertia, and extracting a local peak value interval in the time sequence envelope curve; and in the peak value interval, based on the open-circuit voltage, pulse current and impedance spectrum information of the power battery, online identifying the absorption capacity of the power battery, correcting the upper limit of the state of charge of the power battery, determining a rechargeable current threshold value, carrying out coupling analysis on the threshold value and the recovery power envelope curve, and identifying the reverse current risk time period of the inverter. According to the method, real-time constraint on the absorption capacity of the power battery under the long-slope deceleration working condition is achieved, the inverter reverse irrigation risk is recognized, a peak clipping track and a transient discharge channel are constructed, micro-pulse, accessory absorption and super-capacitor shunting are fused, energy closed-loop control is formed, and the safety of the whole vehicle and the energy utilization efficiency are improved.

The invention relates to the technical field of power monitoring and alarming, and discloses a current alarming method based on a microcontroller. According to the method, multi-channel current signals of a target circuit are collected by using an adaptive sampling window, and the signals are dynamically intercepted to generate an original current data set, so that signal loss is effectively avoided, and current signal information is comprehensively obtained. Time domain-frequency domain conjoint analysis is carried out on an original current data set, fundamental component and harmonic component characteristic values of current signals are deeply extracted, and sensitivity to signal abnormity is improved. And establishing a current state feature vector according to the feature values, and matching a current circuit operation mode in combination with a preset working condition classification template so as to realize accurate identification of the circuit operation state. And loading a corresponding current threshold rule base based on a matching result, and carrying out threshold dynamic correction on the real-time current signal by adopting a sliding window mechanism, so that the alarm accuracy is improved.

A vehicle control method and apparatus, and a storage medium, which belong to the technical field of vehicle control. The method comprises: in response to the fault level being a target level and a first detection result indicating that an engine and an ISG are in a series operation mode, setting a target charging power of a traction battery to be 0, and performing rotational speed closed-loop control on the ISG by using a first rotational speed as a target rotational speed; in response to an actual torque of the engine being less than 0 and the current of a direct-current bus being less than a current threshold value, controlling the traction battery to disconnect from a high-voltage loop, performing rotational speed closed-loop control on the engine, and performing voltage closed-loop control on the ISG; and supplying power to a traction motor (TM) by means of the ISG. Therefore, the stability of the voltage of a direct-current bus can still be ensured when a traction battery is disconnected, thereby ensuring that a TM can still stably drive a vehicle to safely travel when the traction battery has a fault.

The invention relates to the technical field of electric vehicle power supply control, and discloses a charging pile and vehicle BMS intensive power supply controller. The system comprises an electric energy demand modeling module, a multi-source integration module, a dynamic adjustment module, a safety boundary judgment module and an optimized output module. The electric energy demand modeling module obtains battery parameters transmitted by the BMS, analyzes voltage and current thresholds, extracts characteristic quantities to generate a battery demand sequence and constructs an electric energy demand characteristic template; the multi-source integration module collects output parameters of the charging pile and environmental data, matches characteristic quantities and then fuses the parameters to generate an integrated parameter sequence; the dynamic adjustment module calculates a charging stage division threshold, identifies a power boundary condition and generates a dynamic regulation and control instruction set; the safety boundary judgment module monitors output fluctuation and a BMS feedback signal, and compares a safety threshold value to generate a boundary state identifier; and the optimization output module adjusts output waveform parameters according to the identifier, matches the battery demand change trend, generates an optimization power supply strategy, and adapts to the dynamic demand of the battery.

The invention discloses electronic paper display equipment and a feed protection and charging optimization method thereof. The electronic paper display equipment comprises an electronic paper screen; the energy storage unit is used for storing electric energy; the ambient light energy acquisition module is used for converting ambient light into electric energy and providing the electric energy to the power management module; the power management module is used for managing storage and distribution of electric energy and outputting a first voltage signal representing the real-time electric quantity of the energy storage unit and a current signal representing the real-time charging current to the main control module; the display driving module is used for driving the electronic paper screen to refresh pictures, and a power supply loop of the display driving module is controlled by the main control module; and the main control module is used for receiving the first voltage signal and the current signal, and generating a control instruction according to a comparison result of the real-time electric quantity and a first electric quantity threshold value and a comparison result of the real-time charging current and a first current threshold value. According to the invention, the problems of easy display abnormity, slow charging and incapability of automatic recovery during feeding of the electronic paper are solved, and energy autonomy and high-reliability operation are realized.

The invention discloses a high-side driving circuit and a vehicle body controller. The high-side driving circuit relates to the field of vehicle body controllers, and solves the problem that the existing high-side driving circuit cannot meet the requirements of low cost and high reliability. The switching circuit adopts a combined structure of switching tubes and is connected in series between a power supply and a load, and more stable on-off control is realized through cooperation of multiple tubes; the starting threshold circuit responds to an external control signal only when the load impedance meets a preset threshold value, and large-current load driving in the starting stage or forced starting during load abnormity is carried out. The over-current threshold circuit is connected in series with a driving loop of the switching circuit and provides constant over-current turn-off. A voltage negative feedback circuit is introduced into the voltage and potential stabilizing module to realize self-turn-off and keep a turn-off state when overcurrent and short circuit occur, and self-recovery is realized after a fault disappears without depending on logic judgment of an external control unit. The port protection module absorbs the instantaneous high voltage and the surge current. Through the characteristics, the current-carrying capability of the triode is improved, and the application range of the triode switching circuit is widened.

A sticking detection method and apparatus for an electronic park brake system, and a device and a vehicle. The method comprises: in response to a caliper clamping instruction, controlling an electric motor of an electronic park brake system to rotate in a first direction, so as to control a caliper of the electronic park brake system to perform a clamping action; measuring a load current of the electronic park brake system during the process of the caliper performing the clamping action, so as to obtain a first load current; when the first load current reaches a first current threshold value, performing sticking detection on the caliper and the electric motor, so as to obtain a sticking detection result, wherein the sticking detection result is used for indicating whether the electronic park brake system has a clamping sticking anomaly; and when the sticking detection result indicates that the electronic park brake system has a clamping sticking anomaly, determining that the electronic park brake system is abnormal. The method effectively improves the accuracy of fault detection for electronic park brake systems.

The utility model discloses a multipath output protection control power supply device, which comprises a power supply modulation module, a plurality of output modules and a plurality of over-current self-locking protection modules, the plurality of output modules are connected in parallel, each output module at least comprises a switch unit, and the over-current self-locking protection modules are connected in parallel. The head end of each switch unit is connected with the output end of the power supply modulation module, the tail end of each switch unit is used for being connected with a corresponding load, the controlled end of each switch unit is used for being connected with a control module, and each overcurrent self-locking protection module is connected with the output module in a one-to-one correspondence mode. The sampling end of the overcurrent self-locking protection module is connected with the corresponding output module to sample the working current, the control end of the overcurrent self-locking protection module is connected with the controlled end of the corresponding switch unit to drive the switch unit to be disconnected when the working current exceeds a current threshold value, and the design is convenient to use, safe and reliable.

The invention discloses a low-voltage cabinet and an operation environment monitoring and early warning system thereof, and belongs to the technical field of low-voltage electrical equipment monitoring. The system comprises an information acquisition module, an electromagnetic environment analysis module, an in-cabinet environment analysis module, an operation activity analysis module, a temperature-leakage current analysis module and a flow rate optimization module. A plurality of environmental coefficient and collaboration models are constructed by collecting various indexes such as electromagnetism, gas, air pressure, operation frequency and the like, temperature and leakage current thresholds are dynamically calibrated, and the air velocity in the cabinet is optimized based on a temperature-leakage current collaboration coefficient and an operation activity coefficient. The system can comprehensively sense the operation state of the low-voltage cabinet, achieves precise early warning and intelligent ventilation, and effectively improves the operation safety and energy efficiency level of equipment.

The invention provides a DCDC converter, a control method thereof and a communication base station power supply system. A busbar connecting end of the DCDC converter is connected with a DC busbar, and a battery connecting end of the DCDC converter is connected with a battery module; the DCDC converter is used for adjusting the duration that the current of the battery connecting end is greater than or equal to a first current threshold to a second duration when the duration that the current of the battery connecting end is less than a first current threshold is less than a first duration and the voltage of the battery connecting end is less than a first voltage threshold, or adjusting the duration that the current of the battery connecting end is greater than or equal to the first current threshold to a second duration, adjusting the duration that the voltage of the battery connection end is greater than or equal to the first voltage threshold to a third duration; and when the duration in which the current of the battery connecting end is less than the first current threshold is greater than or equal to the first duration, adjusting the duration in which the current of the battery connecting end is greater than or equal to the first current threshold to a fourth duration. The DCDC converter can prevent the battery module from entering the sleep mode in the process of controlling the battery module.

The invention relates to a method for monitoring a multi-line device cell (12) for a technical device (1), the device cell (12) having a plurality of sub-cells (21) electrically connected in parallel to one another, comprising the following steps: detecting (S3) a line current through each of the sub-cells (21), determining (S4) a balancing current from the line currents, a balancing current flows through each of two of the sub-cells (21), and if at least one of the balancing currents exceeds a predefined balancing current threshold, a fault or an abnormality is signaled (S5, S6).

This disclosure relates to a control method, apparatus, electronic device, and storage medium for a device. When the electronic device is running, the method acquires the input current signal of the PFC circuit within the electronic device. When the input current signal is greater than or equal to a first preset current threshold and less than a preset current protection value, the method acquires signal parameters corresponding to the input current signal. These signal parameters include a first duration or a first count. Based on these signal parameters, the method controls the electronic device. This disclosure controls the operation or shutdown of the electronic device using the signal parameters corresponding to the input current signal, avoiding the damage caused to the electronic device by directly shutting down when the input current signal reaches the preset current protection value, extending the device's lifespan, and improving the user experience.

The present invention provides an equipment control device capable of properly protecting a system that controls equipment via a coaxial cable. [Solution] The device control device 100 comprises a power supply circuit, a communication circuit, a filter, a high-side switch, and a control unit 110. The control unit 110 includes a power supply voltage detection unit 111 that detects the power supply voltage supplied from the power supply circuit, and a current data acquisition unit 112 that acquires current data of communication signals transmitted and received from the communication circuit. The control unit 110 also includes a duty cycle acquisition unit 113 that acquires the duty cycle of the current data, and a current value determination unit 114 that determines whether the current value of the current data is equal to or greater than a predetermined current threshold. Furthermore, the control unit 110 includes a duty cycle adjustment unit 115 that reduces the ON ratio of the duty cycle when it is determined that the current value is equal to or greater than the current threshold.

The embodiment of the invention provides a photovoltaic charging control method and device, a storage medium and a charging system. The method is used for controlling a charging system, and the charging system comprises a PV panel, a PV boost converter and a battery system. The method comprises the steps that before a charging system is started, a first switching tube and a third switching tube are closed, and if it is judged that the short-circuit current of a PV panel is larger than a set current threshold value, the PV panel is controlled to be connected to and activate a battery system; when the charging system enters the working stage, acquiring the voltage of the PV panel and the power supply current of the battery system; power supply current and PV panel voltage are calculated through an improved MPPT algorithm, voltage single-loop given voltage is generated, and the improved MPPT algorithm starts to search the maximum power point when the PV panel voltage is zero; calculating the given voltage of the voltage single loop and the voltage of the PV panel based on a proportional-integral algorithm, and generating switch-on time of a switch tube; and the second switch tube and the third switch tube are controlled according to the switch tube conduction time, so that the hardware cost and the control cost of the charging system are reduced.

The invention discloses an overload protection method for an audio power amplifier, and relates to the field of audio power amplifiers. According to the invention, the instantaneous output amplitude signal of the power amplifier is divided by the preset overload threshold impedance to obtain the reference current dynamically changing along with the signal, and the actual output current is compared with the reference current in real time, so that the protection criterion is converted from a fixed current threshold to an adaptive impedance threshold; therefore, real-time identification and turn-off of a low-impedance abnormal load are realized, and normal output of a high-peak-factor audio signal is compatible.

The invention provides a carpet detection method for a sweeping robot, an electronic device and a medium, and relates to the technical field of smart home, and the method comprises the steps: obtaining side scanning current and middle scanning current of the sweeping robot; detecting the pitch angle of the gyroscope when determining that the side-sweep current is greater than a first preset current threshold value and the medium-sweep current is greater than a second preset current threshold value; when the pitch angle is determined to accord with the carpet driving pitch angle range, determining a carpet driving state; wherein the carpet driving pitch angle range is obtained based on driving detection of the sweeping robot on different types of carpets. According to the method, the condition of the ground driving state is quickly filtered through the side-scan current and the middle-scan current, so that sudden current increase caused by accidental reasons of a single motor is effectively eliminated, accurate judgment is performed in combination with the pitch angle under the condition that the two side-scan motors and the middle-scan motor are high in load at the same time, the judgment accuracy is improved, and the judgment efficiency is improved. And the stability and the reliability of the whole identification system in a complex environment are greatly enhanced.

A voltage control module of the power supply circuit is used for transmitting an induced voltage to a constant voltage output module when the induced voltage is less than a preset stabilized voltage, and is switched on and stops outputting the induced voltage when the induced voltage is greater than the preset stabilized voltage. The constant voltage output module discharges to output a preset constant voltage; the induced voltage is obtained according to the induced current of the secondary side of the current transformer; the current sampling module is used for sampling induced current to obtain an amplified voltage signal; the control module is used for obtaining the actual current of the primary side of the current transformer according to the amplified voltage signal, and generating a control signal when the actual current is greater than a preset current threshold value; the switch protection module is used for responding to the control signal and switching between connection and disconnection so as to share energy of the voltage control module during connection. The power supply circuit is high in stability, energy is shared through conduction of the switch protection module in heavy load, and safety and reliability of the circuit are improved.

The invention relates to the technical field of power system fault detection, in particular to a factory power distribution system fault interval section determining method and system and terminal device.The factory power distribution system fault interval section determining method comprises the steps that when a power failure fault of a power distribution system is monitored, voltage and current data within a preset duration before the fault is obtained; comparing the phase current amplitude with a rated current threshold value, judging that the phase current amplitude is an external fault if the phase current amplitude does not exceed the limit, calculating a zero-sequence current if the phase current amplitude exceeds the limit, and comparing the zero-sequence current with a zero-sequence threshold value to distinguish a ground fault or an inter-phase fault; adaptively calling a phase difference analysis process according to an identification result, calculating a phase difference between a zero-sequence current and a zero-sequence voltage during a grounding fault, calculating a phase difference between a fault phase voltage and a fault phase current during an inter-phase fault, and judging whether a fault interval is internal or external according to a phase difference interval; and a structured message is automatically generated by integrating fault types, interval judgment and triggering criterion paths, so that quick and accurate fault positioning and handling are realized.

The present application relates to the technical field of power electronic control, and discloses a split-phase inverter with low no-load power consumption, a control method thereof and a storage medium, wherein a group of complementary switching tubes is arranged on the AC side and a group of high-frequency switching tubes is arranged on the DC side, so that the complementary switching tubes and the high-frequency switching tubes are controlled to emit waves in a first wave-emitting mode when the split-phase inverter is in a starting state, thereby reducing the reactive circulating current of the split-phase inverter and reducing the no-load power consumption of the split-phase inverter; meanwhile, when the real-time output current of the split-phase inverter is greater than or equal to a first current threshold, the complementary switching tubes and the high-frequency switching tubes are switched to emit waves in a second wave-emitting mode, thereby ensuring that the split-phase inverter can be normally loaded; compared with the related prior art, the split-phase inverter can not only solve the problem of high no-load power consumption, but also does not need large-current switching tubes or large radiators, has a smaller product size, a high power density and a lower cost.

The invention relates to the technical field of power electronic control, and discloses a switching frequency control method for an isolated resonant converter and a storage medium, and the method comprises the steps: continuously monitoring the real-time load current of the isolated resonant converter under a load condition; when it is monitored that the maintenance duration of the real-time load current continuously meeting the current operation condition reaches the preset duration, the switching frequency minimum value of the isolated resonant converter is obtained, and according to the size relation between the preset switching frequency and the switching frequency minimum value, the direct-current bus voltage is adjusted in real time, so that the current operation condition of the isolated resonant converter is obtained. The switching frequency minimum value does not exceed the preset switching frequency; wherein the current operation condition is that the real-time load current is greater than or equal to a preset current threshold value. According to the invention, the minimum value of the switching frequency is adjusted by adjusting the voltage of the direct-current bus, so that the device works at the optimal frequency, the EMI of the product is reduced, the size of the magnetic device does not need to be increased specially, the device cost can be remarkably reduced, and the power density of the product is improved.

The present disclosure relates to a memory device having a leakage current verification circuit for minimizing leakage current. In one aspect, the memory device includes, but is not limited to, a memory array, a leakage current verification circuit, and a controller. The controller is configured to perform an erase operation for a first column of memory cells connected to a first word line; set a verification condition including a leakage current threshold; perform a leakage current verification operation for the first column of memory cells by comparing a leakage current of a cell in the first column of memory cells to the leakage current threshold; detect a failure of the first column in response to the cell having a leakage current higher than the leakage current threshold; and perform a post-write operation to repair the failure of the first column of memory cells.

To provide surgical systems. [Solution] A surgical system is disclosed comprising an electrosurgical instrument and a controller that monitors the current supplied from a power source to the electrosurgical instrument, detects when the current reaches or exceeds a current threshold, compares the percentage of power supplied from the power source to the electrosurgical instrument to a power percentage threshold based on the current reaching or exceeding the current threshold, starts a timer for measuring elapsed time based on the power percentage being less than the power percentage threshold, and operates to perform an action based on the elapsed time reaching a time threshold.

The utility model discloses a water pump control system, which belongs to the technical field of water pump control, and comprises a signal input module, a first control module, a driving circuit and a water pump which are connected in sequence, and further comprises a current detection module, the output end of the current detection module is connected with the first control module. Current information of the water pump is collected through the current detection module, running current of the water pump can be monitored in real time, when the current exceeds a current threshold value, the first controller can cut off a power source in time, and the water pump is prevented from being damaged due to overload.

The invention relates to a method, an apparatus, a controller, a system and a product for disabling a phase-locked loop circuit. The method includes determining a current of a compressor in the fuel cell system. The method also includes determining that the fuel cell system is in a purge phase in response to the current being less than a current threshold. Further, the method includes disabling a phase-locked loop circuit in the fuel cell system when the fuel cell system is in a purge phase, where the phase-locked loop circuit is configured to determine whether there is a fault in the compressor based on the current. According to the embodiment of the invention, the accuracy of judging the fault of the air compressor in the fuel cell system can be improved, the normal work of the fuel cell system is realized when the air compressor is in the purging stage, and the working efficiency of the fuel cell system is improved.

A device and method for detecting faults in a shield of an electrosurgical instrument is described. The device has a relay configured to selectively interrupt power to the electrosurgical instrument, monitoring circuitry configured to monitor a shield in the electrosurgical instrument, control circuitry to control the relay, and a battery power source. The monitoring circuitry has an envelope detector and a detected average shield current detector. The monitoring circuitry is configured to compare a shield current peak value to a shield current peak threshold value, and to compare a detected average shield current value to a detected average shield current threshold value. The device is further configured to operatively couple an active electrode of an electrosurgical instrument and a return electrode to an electrosurgical generator.

The application provides a driving circuit and a circuit driving method, characterized by comprising: a current output module, which outputs different current values; a first adjustable resistor, which determines a first adjustable resistor value according to a first current threshold value output by the current module; and a second adjustable resistor, which determines a second adjustable resistor value according to a second current threshold value output by the current module. Thus, the application can be used for calibrating emission or final ranging results in a time-of-flight ranging scheme, so that the emission source emits a more accurate light waveform or the ranging result is more accurate.

The utility model provides a power supply circuit with current detection, a current detection circuit and an electronic overload protection system. The power supply circuit with current detection comprises a current sampling module, an overpower protection module and a power supply module. The power supply module is used for supplying power to the main control module according to the current on the current sampling module; and the overpower protection module is used for conducting when the current on the current sampling module exceeds a preset current threshold value so as to shunt the power supply module. According to the application, the over-power protection module is arranged, and the protection function of the over-power protection module is utilized, so that the over-power protection module can be conducted when the current on the current sampling module exceeds the preset current threshold value to shunt the power supply module, the generated heat can be reduced, the risk of burnout is reduced, and the service life is further prolonged.

The application describes a PV energy generation installation having a central inverter unit (20) for attachment to a PV generator, the PV generator comprising a plurality of PV main strings (PVn) connected in parallel, each connected on the input side with the central inverter unit (20) via a DC line. According to the invention, a monitoring unit (21. N) is assigned to each pair of DC lines assigned to a PV main string (PVn), said monitoring unit comprising a differential current measuring device (8. N), a disconnect switch (9.n) and a monitoring control device (17. N), which is designed to switch the disconnect switch (9.n) and open the PV main string (PV.n) after a differential current threshold value IS, Diff is exceeded. In addition, a ground monitoring device (GFDI) (22) is arranged between one pole of the intermediate circuit (7) and a ground connection (13), which ground monitoring device comprises a ground current measuring device (10), a circuit breaking element (11) and a control device (12), the control device (12) being designed to detect a ground fault by exceeding a ground current threshold value IS after detecting the ground fault. If the earth fault still exists after the end of a defined delay time T, the circuit breaking element (11) is triggered after the delay time T. The invention further relates to a method for fault current monitoring of a facility of this type.

The invention discloses a redundant drying system which comprises a first heating circuit, a second heating circuit and a heating module, the first heating circuit and the second heating circuit are both connected to the heating module, and the heating module is configured to be driven by the first heating circuit and / or the second heating circuit. When it is recognized that the temperature of the first heating circuit is higher than a first preset temperature threshold value, the heating module is configured to be driven by the second heating circuit, temperature changes of the first heating circuit and the second heating circuit are monitored, and when it is detected that the temperature of the first heating circuit drops and is lower than a second preset temperature threshold value, the heating module is configured to be driven by the second heating circuit. The heating module is configured to be driven by the first heating circuit and the second heating circuit, the current value of the first heating circuit is set to be lower than a preset current threshold value, and the second preset temperature threshold value is lower than the first preset temperature threshold value. According to the invention, the safety, compatibility and reliability of the system can be significantly improved through the linkage switching of the redundant dual-heating circuit and the temperature control.