29results about How to "Stable current" patented technology

The invention discloses a high-voltage cable outer metal sheath grounding defect on-line monitoring method and monitoring system, which can work under the condition that a cable is not powered off, realizes on-line monitoring, and realizes on-line monitoring through the cooperation of a current sensor, a voltage sensor, a single-chip microcomputer and an upper computer. And the equipment can quickly detect when a fault occurs and is convenient for maintenance workers to timely eliminate obstacles, so that the risk of major electric power accidents is reduced. The algorithm is similar to an improved neural network algorithm and is used for diagnosing the defects of the outer metal sheath of the cable, the weight is obtained through training learning, and finally the defects of the outer metal sheath of the high-voltage cable are determined. The protection content covers each component of the technical scheme, and comprises a monitoring method, a device structure, a sensor technology, a data processing algorithm, a neural network learning algorithm and the like.

The invention relates to the technical field of illumination, and discloses a road sign lamp for rescue warning, which comprises a controller, at least two lamp strip light sources, interface terminals corresponding to each lamp strip light source, and a lamp strip main belt, the tooth-shaped structure arranged at one end of the interface terminal penetrates through the plastic insulating layer of the lamp strip main belt to be electrically connected with the electric lead of the lamp strip main belt, and the corresponding lamp strip light source is assembled on the lamp strip main belt. The controller comprises a mode control chip and LED driving chips, wherein the mode control chip is used for sending a light-emitting control signal corresponding to a selected light-emitting mode to a first LED driving chip in the at least two LED driving chips so as to enable the light bar light sources corresponding to the first LED driving chip to work, and the LED driving chips correspond to the light bar light sources. Therefore, the physical connection advantage of the connecting terminal is combined with the intelligent control capability of the controller, on the basis that the interface terminal provides excellent electrical connection performance, the road sign lamp can show colorful visual effects, and the reliability, coordination and flexibility of the road sign lamp are enhanced.

The invention discloses a rapid temperature rise test system and method for an electric energy metering box. The method comprises the following steps: controlling a power frequency power supply module to output voltage and current with set magnitudes of power frequency; controlling the output frequency of the harmonic power supply to be harmonic voltage and harmonic current with the set magnitude of the harmonic frequency with the set number of times; any bidirectional power electronic switch in each self-switching resistor module is closed; detecting the temperature of each temperature measuring point of the set electric energy metering box in real time; when the temperature of any temperature measurement point reaches a temperature set limit value, the harmonic power supply module is closed; the current amplitude of the output end of each self-switching resistor module is kept stable by adjusting the number of closed bidirectional power electronic switches in each self-switching resistor module; and continuing to detect the temperatures of all the temperature measurement points until the change of the temperatures before and after each temperature measurement point in unit time is smaller than a temperature rise threshold value. According to the invention, the temperature rise balance time is accelerated, the temperature rise sampling test time can be effectively shortened, and the temperature rise test efficiency of the electric energy metering box is improved.

An anti-fuse memory cell, an anti-fuse memory array and a memory, the anti-fuse memory cell comprising: an anti-fuse structure having a first end and a second end; the selection transistor comprises a drain electrode and a source electrode, and one of the drain electrode and the source electrode is coupled with the first end of the anti-fuse structure; and the anode of the voltage stabilizing diode is coupled with the other one of the drain electrode and the source electrode. According to the embodiment of the invention, the voltage stabilizing diode is additionally arranged in the anti-fuse memory cell and is connected with the selection transistor in series, the voltage stabilizing diode can provide stable voltage for the selection transistor, interference caused by current fluctuation can be resisted, correspondingly, the selection transistor can provide stable current for the anti-fuse structure, and the anti-fuse memory cell is more stable in performance. Therefore, the programming reliability of the anti-fuse structure is improved.

The utility model relates to a mercury lamp power supply device for a tester. The mercury lamp power supply device comprises an electronic trigger, a ballast and a relay, a first end of a normally open contact of the relay is electrically connected with one end of the power supply end, a second end of the normally open contact of the relay is electrically connected with a first end of the ballast, and a coil of the relay is electrically connected with the tester control end; the second end of the ballast is electrically connected with the first end of the load; the first end of the electronic trigger is connected to a line between the second end of the ballast and the first end of the load, the second end of the electronic trigger is electrically connected with the first end of the load, and the second end of the load is electrically connected with the other end of the power supply end. According to the mercury lamp power supply device for the tester, the overall structure is simple, maintenance is easy, the success rate of lightening the mercury lamp is high, and voltage and current provided for the mercury lamp after lightening are stable.

The invention discloses biomass particle intelligent integrated processing equipment which comprises a wood powder collecting trolley, a first-stage feeding machine, a drum screen, a second-stage feeding machine, a granulator and a PLC, the wood powder collecting trolley is connected with the drum screen through the first-stage feeding machine, the drum screen is connected with the granulator through the second-stage feeding machine, and the PLC is connected with the drum screen through the second-stage feeding machine. The wood powder collecting trolley comprises a frame, a propelling wheel, a propelling wheel driver, a thrust sensor, a scraper driver, a rotary scraper and a wood powder conveyor, the bottom of the rotary screen is connected with a weighing sensor, the granulator is provided with a hydraulic oil cylinder and a displacement sensor, and the hydraulic oil cylinder is connected with hydraulic oil cylinder control equipment. The device has the beneficial effects that dust is little during working, and the working environment is effectively protected; the gap adjustment is uniform and reasonable, and the working efficiency is improved; the feeding speed is automatically adjusted, the current is stable, and the failure rate of equipment is effectively reduced.

The utility model relates to the technical field of lamp power supplies, aims to solve the technical problem that the existing LED lamp is poor in time delay effect, and discloses an LED gradually-bright and gradually-dark control circuit which comprises an LED assembly, a switch SW, a PNP type triode Q5 and a constant-current driver U11, a collector electrode of the triode Q5 is grounded in series through a first voltage division circuit, and the collector electrode of the triode Q5 is grounded through a second voltage division circuit. An emitter of the triode Q5 is connected to a direct-current power supply V +, an intermediate node of the first series voltage division circuit is connected with an enable end of the constant-current driver U11, the enable end is grounded through a capacitor C21, a power switch end of the constant-current driver U11 is connected with a current sampling end of the constant-current driver U11 sequentially through an inductor L3 and an LED assembly, the current sampling end is connected to the direct-current power supply V + through a current detection resistor, and the direct-current power supply V + is connected with the LED assembly. The power input end of the constant-current driver U11 is connected to the direct-current power supply V +, and the ground end of the constant-current driver U11 is grounded. Compared with an existing circuit, the constant-current driver U11 participates, so that the control precision is high, the dimming ratio is high, and the delay effect is better.

A rotating electrical machine control device shifts a control system to synchronous five-pulse control when an operating point crosses a second boundary K22 from a state in which asynchronous pulse-width modulation control is being executed, and shifts the control system to the asynchronous pulse-width modulation control when the operating point crosses a first boundary K21 from a state in which the synchronous five-pulse control is being executed. The first boundary K21 is set such that the number of switching pulses per unit rotational speed by the synchronous five-pulse control immediately before the operating point crosses the first boundary K21 is smaller than the number of the switching pulses per unit rotational speed by the asynchronous pulse-width modulation control immediately after the operating point crosses the first boundary K21.

The invention discloses a power supply protection method, system and equipment for a server and a storage medium, and is applied to the technical field of servers, a controller is connected with a collector and an auxiliary power supply device, and the controller, the collector and the auxiliary power supply device are all arranged at a first position outside a server shell. The power supply protection method of the server comprises the following steps: receiving an output current of a power supply of the server collected by a collector; based on the output current, judging whether the server obtains stable power supply or not; if not, the auxiliary power supply device is controlled to be in a discharging state, so that the auxiliary power supply device and the power supply jointly supply power to the server, and after it is determined that the server is stably powered, the auxiliary power supply device is controlled to stop supplying power. By applying the scheme of the invention, the current characteristics of the GPU can be effectively handled, the power supply protection of the server is realized, the stability of a power grid is ensured, and the influence of the layout space of a server mainboard is avoided.

The utility model provides a test system and device for a vehicle-mounted refrigerator, and relates to the technical field of testing, and the test system comprises a power module, a communication module, a control module and a switch module. The power module is connected with the battery; the communication module is connected with the power supply module and the vehicle-mounted refrigerator; the control module is connected with the power module and the communication module; the switch module is connected with the power supply module and the control module, when the switch module works in a first conduction state, the control module controls the vehicle-mounted refrigerator to be switched to a refrigeration test mode through the communication module, and when the switch module works in a second conduction state, the control module controls the vehicle-mounted refrigerator to be switched to a heating test mode through the communication module. According to the test system, the test mode of the vehicle-mounted refrigerator can be correspondingly and automatically changed by changing the conduction state of the switch module, and the switching flexibility is high. And the professional demand is relatively low, the operation is simple, the cost is relatively low, and batch testing of the vehicle-mounted refrigerator is facilitated.

This utility model relates to the field of door lock technology and discloses an intelligent door lock. The intelligent door lock includes a lock body, an electrical device, and an emergency power generation device. The electrical device is installed on the lock body. The emergency power generation device includes a magnet, a metal component, an emergency power storage module, and a drive module. The magnet is installed on the lock body; the metal component is located in the magnetic field of the magnet; the emergency power storage module is installed on the lock body; the input end of the emergency power storage module is electrically connected to the metal component; the output end of the emergency power storage module is electrically connected to the electrical device; the drive module is installed on the lock body; the drive module is connected to the metal component and is used to drive the metal component to reciprocate along a first direction, so that the metal component charges the emergency power storage module; the first direction is not parallel to the direction of the magnetic field lines of the magnet. The emergency power storage module can provide a stable current to the electrical device, improving the stability and reliability of the power supply, and solving the problem of poor reliability of emergency unlocking schemes in existing intelligent door locks.

The application provides a kind of lighting device driving circuit and clothes processing equipment, belong to the technical field of household appliance control.Circuit includes control module, switch control module and voltage stabilizing module.Control module sends control signal.Switch control module is connected with lighting device.Switch control module is connected with control module.Switch control module controls the circuit conduction between switch control module and lighting device according to control signal.Voltage stabilizing module is connected with switch control module.Under the condition that the circuit between switch control module and lighting device is conducted, voltage stabilizing module can stabilize the voltage of switch control module, to stabilize the current between switch control module and lighting device.Through the circuit provided by the application, it is ensured that the current flowing through the lighting device remains unchanged, so that the luminous intensity of the lighting device is stable, the stability of the luminous intensity is improved, and the problem of poor luminous intensity stability of the lighting device in the traditional circuit is solved.

The purpose of the present invention, relating to lanthanide boride, which is known as a low work function material, is to provide a novel low work function material with low chemical reactivity, in particular a low work function material of which the material surface, after being exposed to atmospheric gases, can be cleaned at a heating temperature lower than in the prior art. The present invention is a laminate containing a lanthanide boride film formed on a substrate, the surface of said film being covered by a thin film, wherein the thin film is a monatomic layer of a hexagonal boron nitride thin film.

This utility model discloses an HD digital projection module headlight, comprising: a housing; at least one HD module installed inside the housing, the housing having a light-transmitting portion for cooperating with the HD module; a module mounting bracket connected to the HD module; and a dimming structure connecting the module mounting bracket and the housing, the dimming structure controlling the distance from the mounting bracket to the light-transmitting portion to adjust the light emission effect. The dimming structure includes a base plate and an adjusting screw, the base plate having an adjusting channel, at least a portion of the sidewall of the adjusting channel having an adjusting groove, the thread of the adjusting screw engaging with the adjusting groove, and the base plate having a connecting portion cooperating with the module mounting bracket. This utility model, through its dimming structure, enables adjustment of the HD module, increases user interactivity, enhances personalized settings, achieves precise control, and increases the sense of technology and fun.

The invention relates to the technical field of electrochemical catalysis and carbon dioxide conversion, in particular to a silicon carbide loaded Ag30Cu14 nanocluster catalyst and application thereof in electrocatalytic CO2 reduction. The silicon carbide loaded Ag30Cu14 nanocluster catalyst is an Ag30Cu14 bimetallic nanocluster with precise atoms, the chemical formula is Ag30Cu14 (TPP) 4 (SR) 28, the silicon carbide loaded Ag30Cu14 nanocluster catalyst has an irregular structure of an Ag27 core and an Ag3Cu14 shell, and the silicon carbide is loaded with the Ag30Cu14 nanocluster; the silicon carbide-loaded Ag30Cu14 nanocluster catalyst prepared by the preparation method disclosed by the invention is a loaded CO2RR catalyst which is low in cost and accurate in atom structure, and the product selectivity can be regulated and controlled through post-treatment.

The invention discloses a hydrogen production circuit for a PEM electrolytic cell and an online impedance detection method of the hydrogen production circuit, and aims to overcome the defect that an existing electrolytic cell impedance detection method needs to be shut down. The circuit comprises a first power supply circuit as a current source and a second power supply circuit as a voltage source, the first power supply circuit is connected in series with a first end of a PEM load, and the second power supply circuit is connected in series with a second end of the PEM load. One of the first power supply circuit or the second power supply circuit is injected with excitation harmonic waves, voltage and current signal acquisition circuits are arranged at the two ends of the PEM load, and the excitation harmonic waves are generated through a control module. The aging state of the electrolytic cell can be detected online, so that performance reduction of the electrolytic cell can be found in time.

The present invention discloses a broadband oscillation suppression equipment for a new energy power station and a suppression method thereof, and the present invention relates to the technical field of broadband oscillation suppression. The broadband oscillation suppression equipment for a new energy power station and a suppression method thereof, a broadband oscillation suppression equipment for a new energy power station, comprises a fixing seat, a filter, an insulating magnet, and a terminal. The outer wall of the fixing seat is fixedly connected to the filter, the top of the filter is fixedly connected to the insulating magnet, the inner sleeve of the insulating magnet is connected to the terminal, and a driving part is arranged on the side of the filter. When the driving part and the protective part are used in combination, when the driving part transports gas into the interior of the protective part, the protective part can sleeve the terminal, and at this time, sand can be prevented from contacting the terminal, thereby ensuring the stability of the current and allowing the filter to work normally.

The utility model discloses a current-limiting protection circuit based on an MOS tube, and specifically relates to the technical field of current-limiting protection. The circuit is technically characterized by comprising a first resistor, a first triode, an MOS tube, a second resistor and a third resistor, a current detection module formed by a first resistor is used for measuring the current value of an input signal and converting the current signal into a voltage signal, and a first triode is switched on after the measured current value reaches a preset current threshold value; a feedback circuit module composed of a first triode, a second resistor and a third resistor is used for controlling the grid electrode of the MOS tube to discharge through the first triode so as to control the voltage of the grid electrode of the MOS tube to be reduced and the equivalent resistance between the drain electrode and the source electrode to be increased, so that the current of the drain electrode is reduced, and the voltage of the first resistor can be reduced immediately after reduction; therefore, negative feedback dynamic balance is formed between the first triode and the MOS tube, and the circuit always operates at a stable current value.

The utility model provides a DC screen fault monitoring system. The device comprises a storage battery pack, a first switch module, a first light module, a second light module, a delay comparison module and a first control module. The storage battery pack is respectively connected with the first light module and the second light module; the first light module and the second light module are both connected with the first switch module, and the first light module and the second light module are connected in parallel; the first control module is respectively connected with the first switch module and the delay comparison module, and the delay comparison module is used for being connected with an electric appliance; the first control module is configured to control the on state of the first switch module according to the information of the delay comparison module; the first light module is configured to display a first color when powered on; the second light module is configured to display a second color when powered on. According to the invention, the fault problem of the DC screen can be found in time.

The invention provides an electrode pair cabin self-cleaning system and method applied to a low-conductivity fluid connected domain, and the system comprises a battery cabin which is provided with a metal plate pair electrode for supplying electric energy to a power management module; the power supply management module is used for meeting the power utilization requirement of a load, providing redundant electric energy for the energy storage battery, and disconnecting the circuit connection with the battery cabin when detecting that the power of the electric energy output by the battery cabin is lower than a preset threshold value; the energy storage battery is used for providing electric energy for the power supply management module when the energy storage battery is disconnected with the battery cabin circuit, so that the power supply management module can charge the energy storage capacitor while meeting the power supply of the load; and the energy storage capacitor is used for performing transient high-frequency discharge on the opposite poles of the metal plates in the battery cabin when the energy storage capacitor is charged to a rated voltage value. According to the scheme, the defect that scale deposits or adheres to the surface of an electrode-to-plate under the condition of long-time operation in a fluid connected domain of an existing electrode-to-plate electric energy output device with low-conductivity fluid as electrolyte is overcome.

The application discloses an energy storage system power distribution strategy based on an error function, mainly comprising an event-triggered dynamic consistency algorithm module, an error function-based SOC equalization algorithm module, a virtual voltage drop module, a voltage compensation module and a voltage and current double-loop control module. The event-triggered dynamic consistency algorithm module is added, so that the system changes from "timed communication" to "on-demand communication", while reducing the communication burden, the error function-based SOC equalization algorithm module can dynamically divide the output current of each energy storage unit according to the real-time deviation of the state of charge of each energy storage unit and the average state of charge of the energy storage system, thereby improving the accuracy of the equal division of the output current between energy storage units with different capacities. In addition, the virtual voltage drop module and the voltage compensation module ensure that the voltage is stable within the rated range.

This invention relates to the field of lubrication system technology and proposes an intelligent lubrication system for dock gantry cranes. The system includes an oil pump control circuit comprising an operational amplifier U1, a NAND gate U2, a NOT gate U3, switching transistors Q1 and Q2, and a resistor R4. The non-inverting input of operational amplifier U1 is connected to a reference voltage Vref. The output of operational amplifier U1 is connected to the first input of NAND gate U2. The input of NOT gate U3 is connected to the main control unit, and the input of NOT gate U3 is connected to the second input of NAND gate U2. The output of NAND gate U2 is connected to the control terminal of switching transistor Q1, and the output of NOT gate U3 is connected to the control terminal of switching transistor Q2. The first terminal of switching transistor Q1 is connected to a 24V power supply, and the second terminal of switching transistor Q1 is connected to the first terminal of the oil pump. The first terminal of switching transistor Q2 is connected to the second terminal of the oil pump, and the second terminal of switching transistor Q2 is grounded through resistor R4. The second terminal of switching transistor Q2 is connected to the inverting input of operational amplifier U1. This technical solution solves the problem of unstable power supply operation of the oil pump in related technologies.

This utility model discloses an improved conductivity device for clamps in horizontal pulse electroplating equipment, belonging to the technical field of horizontal electroplating equipment. It includes a turntable, multiple clamp bodies, and a dust collection mechanism. The clamp bodies are installed around the turntable, and each clamp body is equipped with a slider. A copper cylinder guide rail, which works in conjunction with the slider, is provided on one side of the turntable. By using corrosion-resistant heat-shrink tubing as the protective sleeve, the wires can be physically isolated and protected. By installing the dust collection mechanism at both ends of the copper cylinder guide rail, the dust inside the copper cylinder guide rail is carried by the slider to the dust collection mechanism for collection and cleaning. This ensures that there is no obvious dust inside the copper cylinder guide rail, resulting in good contact between the slider and the copper cylinder guide rail, guaranteeing stable current in the clamp body, and extending the service life of the slider and the copper cylinder guide rail, thus achieving a good effect in improving the conductivity of the clamps in horizontal pulse electroplating equipment.

The utility model discloses a power supply which comprises a circuit board, a heat dissipation shell and a plurality of heating assemblies. Each heating assembly comprises a heat conduction iron core and a magnetic coil. The heat conduction iron core is in thermal contact with the heat dissipation shell. The magnetic coil is arranged on the heat conduction iron core and is electrically connected to the circuit board. And the magnetic coils of the plurality of heating components are coaxially arranged and are connected in series through a circuit board.

This invention discloses an anti-interference communication device and method. A constant current circuit is set between the master and slave devices. This circuit converts voltage or digital signals into a constant current signal, which is transmitted between the master and slave devices via a communication line. Utilizing constant current for transmission between the master and slave devices overcomes the problems of poor anti-interference capability, impedance mismatch, and signal instability in existing data transmission methods, thus reducing interference in the communication circuit. The current control scheme proposed in this invention uses inexpensive components, and the effective stabilization of the current in the communication circuit through circuit structure construction achieves stable signal transmission between the master and slave devices.

The embodiment of the invention discloses a thermal resistance signal acquisition system for ships, which comprises a signal acquisition module, and the signal acquisition module comprises a plurality of signal acquisition units arranged in parallel, a switch unit and an analog-to-digital conversion unit. And each signal acquisition unit corresponds to one thermal resistance sensor. The signal acquisition unit comprises a first signal transmission line, a second signal transmission line and a compensation signal transmission line, the first signal transmission line and the second signal transmission line receive voltage signals at the two ends of the thermal resistance sensor respectively, the first signal transmission line outputs a first signal, and the second signal transmission line outputs a second signal; the compensation signal transmission line receives a voltage signal of any one of the two ends of the thermal resistance sensor to output a compensation signal. The switch unit comprises a plurality of signal transmission channels, and the signal transmission channel corresponding to a single signal acquisition unit is conducted based on a control instruction, so that the analog-to-digital conversion unit receives the first signal, the second signal and the compensation signal of the signal acquisition unit.

The embodiment of the invention provides a water softener and a control method of a sterilization module. According to the water softener, the sterilization module is arranged at the downstream of the jet device, so that diluted saline water (namely a mixed solution) mixed and diluted by the jet device is directly electrolyzed by the sterilization module, and the diluted saline water is electrolyzed by the sterilization module to generate a low-concentration sterilization solution (namely a target solution), so that the corrosion to each contact part in a pipeline is reduced. And meanwhile, the flow of the mixed solution is larger than that of strong brine, so that the influence of bubbles in the electrolysis process can be better reduced, and the current and the electrolysis effect are more stable.

The utility model belongs to the technical field of batteries, and discloses a battery cell group and a battery structure, the battery cell group comprises a plurality of battery cell bodies, a connecting piece, an adjusting piece and a heat insulation assembly, the connecting piece is connected with the plurality of battery cell bodies and is used for connecting the plurality of battery cell bodies in series or in parallel; each adjusting part is arranged between the two adjacent battery cell bodies and is used for adjusting the distance between the two adjacent battery cell bodies; the heat insulation assembly is connected with the adjusting piece. Therefore, under the action of the connecting piece, the plurality of battery cell bodies are mutually connected, and the distance between the adjacent battery cells can be adjusted by adjusting the adjusting piece, so that the specification of the whole battery cell group is adjusted, the battery cells with different specifications can adapt to shells with the same specification after being assembled, the battery assembly flexibility is improved, the production cost is reduced, and the production efficiency is improved; and the heat insulation assembly enables heat accumulation not to be easily generated between the adjacent battery cells, so that potential safety hazards are avoided.

The utility model relates to an overflowing type disinfection system, which belongs to the field of disinfection devices, and comprises a disinfection component, an overflowing type disinfection component and a control component, the diversion assembly is arranged on the disinfection assembly, the disinfection shell is provided with a disinfection cavity or the disinfection cavity is defined by the disinfection shell and the diversion assembly, the electric disinfection part is located in the disinfection cavity, the diversion assembly is provided with a liquid inlet and a liquid inlet flow channel, the liquid inlet, the liquid inlet flow channel and the disinfection cavity are sequentially communicated, and the diversion assembly is provided with a liquid outlet and a liquid outlet flow channel. The disinfection cavity, the liquid outlet flow channel and the liquid outlet are communicated in sequence; the electric control assembly is arranged on the flow guide assembly or the disinfection shell, and the electric control assembly is electrically connected with the electric disinfection part. According to the overflowing type disinfection system, liquid can be electrolyzed through the electric disinfection part to form hypochlorous acid for disinfection, so that the disinfection effect of a product can be ensured without adding a disinfectant by a user.