2421 results about "High voltage source" patented technology

Embodiments of the present disclosure relate to a system and methods for processing a substrate in a plasma processing system. In an embodiment a plasma processing system is provided that includes a radio frequency (RF) generator coupled to a substrate support base disposed within the plasma processing system and configured to deliver an RF signal to the substrate support base, a pulsed voltage (PV) waveform generator coupled the substrate support base and configured to deliver a PV waveform to the substrate support base while the RF signal is delivered to the substrate support base, and a high voltage supply coupled to a biasing electrode of the plasma processing system and configured to deliver a chucking voltage to a biasing electrode disposed with the plasma processing system.

The invention relates to the technical field of image processing, in particular to a high-voltage power supply element defect identification method based on computer vision. The method comprises the steps of collecting a surface image of a high-voltage power supply element; the method comprises the following steps: acquiring a grayscale image and a connected domain thereof, acquiring a main direction of the connected domain, constructing a width sequence based on a length perpendicular to the main direction, acquiring a width change coefficient according to the width sequence, and acquiring ambiguity of a pixel point based on a pixel point neighborhood grayscale value; constructing a window for the edge pixel points, obtaining the correlation of the edge pixel points according to the classification of the connected domains in the window, obtaining the similarity between the connected domains according to the Fourier descriptors of the connected domains, and obtaining the scratch integrating degree of the edge pixel points based on the similarity; and screening the edge points of the scratch area according to the scratch integrating degree of the edge pixel points and the ambiguity of the edge pixel points, and completing defect identification. According to the invention, the surface defect detection efficiency of the high-voltage power supply element is improved.

The invention relates to the technical field of electrical variable measurement, in particular to a ripple test method and system for a high-voltage power supply. The method comprises the following steps: based on detection data, acquiring a ripple wave over-expectation coefficient of a high-voltage power supply and a decomposed ripple wave waveform curve; acquiring a stability coefficient of an environment where the high-voltage power supply is located based on the monitoring data of the load equipment; obtaining a ripple measurement compensation coefficient of the high-voltage power supply based on the ripple over-expectation coefficient of the high-voltage power supply and the stability coefficient of the environment where the high-voltage power supply is located; on the basis of the compensation coefficient and the detection data, a ripple signal curve for compensation identification is obtained; obtaining a high-voltage power supply ripple waveform curve based on the decomposed ripple waveform curve and the compensated and identified ripple signal curve; and based on the ripple waveform curve of the high-voltage power supply, measuring the ripple of the high-voltage power supply to obtain a measurement result. According to the invention, the measurement precision of an existing test method in the process of measuring the ripples of the high-voltage power supply is improved.

Embodiments of the present disclosure relates to an integrated circuit including an array of memory cells having the word lines and high-voltage power lines positioned on one side of the transistors and the bit lines and low voltage power lines positioned on the other side of the transistor. The memory cells according to the present disclosure also improve routing efficiency, thus, removing bottleneck of further scaling both SRAM cell.

The invention relates to the technical field of power electronic driving control, in particular to a driving system and method for an ultrasonic air pump, and the system comprises a control signal generation module which is used for generating a control signal; the voltage superposition driving module is coupled to the control signal generation module and is used for superposing and lifting the driving voltage according to the control signal and executing reversing operation, and the reversing operation comprises forward driving and reverse driving; the driving frequency adjusting module is coupled to the control signal generating module and is used for adjusting the driving frequency and speed of the ultrasonic air pump based on the control signal; and the working circuit protection module is coupled to the voltage superposition driving module and is used for setting dead time between forward driving and reverse driving to prevent short circuit. According to the invention, the dependence of the ultrasonic air pump on an independent high-voltage power supply and how to realize high-voltage alternating driving through voltage superposition and avoid the risk of bridge arm direct connection and resonance mismatch under the constraint of a low-voltage power supply are effectively solved.

The invention discloses an X-ray imaging diagnosis system based on a Timepix3 detector, and belongs to the technical field of plasma diagnosis. The system comprises a Timepix3 detector, a data server, an upper computer, a signal generator and a high-voltage power supply, the signal generator is used for performing remote control on the Timepix3 detector and providing pulses during plasma discharge to ensure that the Timepix3 detector acquires data in a trigger mode; the high-voltage power supply is used for providing bias voltage for a semiconductor sensor of the Timepix3 detector; the upper computer is used for sending an instruction to the Timepix3 detector to carry out data acquisition; and the data server is used for receiving and storing the collected data. The device can be applied to a plasma discharge experiment carried out in a Tokamak device, and has higher spatial resolution, stronger time resolution capability and capability of quickly acquiring an X-ray signal energy spectrum.

The invention provides a self-adaptive dual-energy pulse X-ray detection system and a detection method. The self-adaptive dual-energy pulse X-ray detection system comprises a dual-energy X-ray emission module, a pulse modulation and high-voltage power supply module, a detector array and a self-adaptive control system, wherein the dual-energy X-ray emission module is in signal connection with the pulse modulation and high-voltage power supply module; the detector array is positioned on the opposite side of a detected object; and the self-adaptive control system is in signal connection with the pulse modulation and high-voltage power supply module. The self-adaptive dual-energy pulse X-ray detection system and the self-adaptive dual-energy pulse X-ray detection method have high penetrating power, and the problems of fuzzy recognition and generation of image blind areas can be effectively avoided.

An air filtering device for an air conditioner, in particular for filtering out particles, preferably pollutants, from air is provided. The air filtering device comprises a flow path through which air flows along a flow direction, an ionizer for generating ions in the flow path, and grid structure made of an electrically conductive material, that is upstream of the ionizer in the flow path in the flow direction, which forms a first electrode. A filter is downstream of the ionizer in the flow path in the flow direction which has a layer that forms a second electrode. The air filtering device also comprises a high voltage power source that has an electric pole and an electric counter-pole for generating a high voltage between the pole and the counter pole. The pole is electrically connected to the ionizer, or its discharge electrode, and the counter-pole is electrically connected to the first and second electrodes.

The invention discloses a multiband high-voltage power supply control system and a normalization control and protection method thereof, and relates to the technical field of power supply control, and the method comprises the steps: collecting multi-mode signals of S, C and Ku band high-voltage power supply systems and a cooling system; an SDAE deep network and an integrated learning AdaBoost framework are combined to construct a fault diagnosis model, and a fault type and confidence are obtained according to signal features; when a fault occurs, high-voltage output of a corresponding power supply unit is cut off and reported through an isolation interface, and a deep reinforcement learning agent is used for carrying out protection action intelligent decision making; a digital twinborn model of a power supply unit is constructed, an improved grey wolf optimizer is used for multi-task collaborative optimization, optimized system parameters are acquired and issued to a PLC for execution, and waveband output stability is ensured. According to the invention, high reliability, rapid response and intelligent operation and maintenance of the multi-band high-voltage power supply system are realized through deep integration of multi-source signal acquisition, intelligent fault diagnosis, adaptive protection decision and digital twinning optimization.

Sensing circuitry for an implantable stimulator device is disclosed. The sensing circuitry includes a downselector with switching networks used to couple selected electrode nodes and / or DC voltages to one or more sense amps. The switching networks comprise high-voltage devices that are controlled in accordance with a high-voltage power supply voltage VH. VH may be generated by a boost circuit, and may be set to the higher of a boosted voltage and a compliance voltage that powers the stimulation circuitry. The switching networks include three switches, some of which may comprise transfer gates. The downselector can be controlled to couple one or more electrodes nodes to a particular sense amp during sensing durations. The downselector can also be controlled during stimulation durations to couple one or more electrodes nodes together, thus supplementing operation of the stimulation circuitry.

The invention relates to the technical field of high-voltage power supply wiring terminal monitoring, in particular to a safety state monitoring method and system for a high-voltage power supply wiring terminal, and the method comprises the steps: obtaining the current data of a connection line of the high-voltage power supply wiring terminal and the temperature data of the wiring terminal; dividing a rising process, a falling process and a constant process to obtain a square wave impact current and a non-square wave impact current; the steep degree of current change in the rising and falling process and the deviation degree of current data in the constant process are analyzed, a current impact coefficient is obtained, a current impact temperature change consistency coefficient is constructed, a synchronous abnormal coefficient of each time period is obtained, and the state of the high-voltage power supply wiring terminal is monitored. According to the invention, the accuracy of monitoring the safety state of the high-voltage power supply wiring terminal is improved.

The invention provides a high-voltage power supply and distribution system for an electric vertical take-off and landing aircraft, and belongs to the technical field of power supply and distribution regulation control systems, and the system comprises a main bus bar module which is used for the current collection and distribution of an energy storage battery and a ground DC bus high-voltage power supply, and is provided with a fuse for overload cut-off; the output bus bar module comprises six mutually-independent motor load output channels and two mutually-independent high-voltage output channels, and each motor load output channel supplies power to the two symmetrically-arranged motors at the same time and is used for distributing 12 motor loads and 2 high-voltage output loads; the power-on buffer module is used for power-on buffer of 12 paths of motor loads and restraining power-on impact current; the self-locking control module has a motor load output control self-locking function, and can keep normal output of motor load current under the condition that the monitoring unit fails; and the monitoring unit module is used for monitoring the input voltage, the output voltage and the load current, and performing power-on buffer control and high-voltage contactor self-locking control on the motor load.

The present disclosure relates to a partial discharge monitoring system and a partial discharge monitoring method that are capable of monitoring and determining a defect generated in a high-voltage power device in real time by classifying signals generated from the high-voltage power device with a machine learning algorithm being applied, and capable of easily forming feature dot data clusters in both a high-density area and a low-density area of two-dimensional feature dot data by performing a process of clustering feature dot points generated from the signals of the power device on the basis of density and distance in parallel, respectively, thereby generating PRPD data for each cluster without missing a signal to improve partial discharge determination accuracy.

The present disclosure relates to an electrostatic precipitation device. The electrostatic dust collection device comprises a plurality of positive electrode plates and a plurality of negative electrode plates, the positive electrode plates and the negative electrode plates are alternately arranged at intervals, the positive electrode plates are communicated with the positive electrode of the high-voltage power supply, and the negative electrode plates are communicated with the negative electrode of the high-voltage power supply. At least two adjacent electrode plates are formed by wrapping conductive materials with insulating materials, at least one of the two adjacent electrode plates is provided with exposed conductive materials, the exposed conductive materials are located in an effective working area or located outside the effective working area, and the distance between the exposed conductive materials and the effective working area is smaller than or equal to 10 mm. If the two adjacent electrode plates both have exposed conductive materials, the distance between the exposed conductive materials on the two adjacent electrode plates in the direction perpendicular to the distance between the electrode plates is larger than or equal to the minimum distance between the electrode plates, and the effective working area refers to an area which is located between the two adjacent electrode plates and through which unpurified gas can flow. Therefore, normal operation can be ensured when high voltage is applied to the conductive materials of the adjacent electrodes, and meanwhile, the long-term operation efficiency of the electrostatic dust collection device can be well maintained.

The invention relates to the technical field of voltage control, and particularly discloses a voltage control method for a high-reliability high-voltage power supply, and the method comprises the steps: carrying out the input filtering and power conversion boosting processing of a DC voltage signal provided by a power supply, so as to obtain a high-voltage AC signal; a signal processing technology based on deep learning is adopted to perform CEEMDAN decomposition and intrinsic mode feature extraction on a sampled voltage signal, feature saliency modulation dynamic aggregation is performed on each intrinsic mode after decomposition of the sampled voltage signal to suppress noise and interference in the signal, and a pure sampled voltage signal is obtained. And error calculation and MOS tube driving control are carried out in combination with an external control voltage signal, so that accurate adjustment of the output voltage of the high-voltage power supply is realized. Therefore, the precision of voltage control can be effectively improved, and the adaptability to complex and changeable load conditions and interference environments is enhanced, so that the stability and reliability of a high-voltage power supply system are remarkably improved.

The utility model relates to a pilot test device for high-voltage electrostatic modification of crude oil, which is characterized in that the pilot test device for high-voltage electrostatic modification of crude oil is skid-mounted and is arranged above a movable underframe; the utility model discloses a crude oil high-voltage electrostatic modification pilot test device which comprises a detection meter, a constant-temperature assembly, a stirring kettle, a delivery pump, a high-voltage processor, a high-voltage power supply, a crude oil collector, a control electric box and an electromagnetic valve, by using the skid-mounted crude oil high-pressure modification experimental device, in oil pipelines with different viscosities or contents, the three different forms of high-pressure processors also improve the variable condition of the test, the actual use effect of the high-pressure processors in various forms is analyzed, and the overall test efficiency of the experimental device is improved.

The invention relates to the technical field of agricultural product preservation, in particular to a knapsack plasma activated water generating device which comprises a box body, a display module installed on the box body, a large water tank, a small water tank, a plasma activated water generator assembly and a fixing frame, and the large water tank, the small water tank, the plasma activated water generator assembly and the fixing frame are installed in the box body. A second ultrasonic radar liquid level meter is fixedly arranged at the top of the large water tank, and a second ion concentration detection sensor is fixedly arranged at the bottom; a first ultrasonic radar liquid level meter is fixedly arranged at the top of the small water tank, and a first ion concentration detection sensor is arranged at the bottom; a controller is arranged above the small water tank, and a high-voltage power supply and a battery are arranged in the controller. The device is light and handy in design and convenient to carry, the use flexibility is greatly enhanced, and the surfaces of the fruits and the vegetables can be quickly and effectively sterilized, so that the fresh-keeping period of the fruits and the vegetables is remarkably prolonged, the corrosion rate of the fruits and the vegetables is reduced, and the economic benefit is improved.

A disclosed nondestructive testing device for internal defects of a copper-aluminum composite board comprises a base plate, the base plate is connected with a C-shaped frame through an integral moving device, the upper end and the lower end of the C-shaped frame are respectively provided with an X-ray source and a ray detector, and the X-ray source and the ray detector are oppositely arranged; a signal conversion device, a high-voltage power supply and a control host are further arranged on the bottom plate, the high-voltage power supply is connected with the X-ray power supply, and the ray detector is in electric signal connection with the control host through the signal conversion device. The X-ray principle is utilized to irradiate the copper-aluminum composite board, the density difference in the board is reflected through the X-ray imaging board, the internal defects of the board are automatically judged through an algorithm, X-rays penetrate through the detected board and do not affect or damage the board, and the non-contact detection mode is compared with a destructive detection means, so that the detection accuracy is improved. The problem that a product is damaged in the detection process is solved.

The invention discloses a high-stability high-voltage power supply, and belongs to the technical field of high-voltage power supplies, the high-stability high-voltage power supply comprises a clamping assembly, the clamping assembly comprises a fixing part and a lifting part, a heat dissipation area is formed between the lifting part and the power supply, a heat dissipation assembly is arranged in the clamping assembly, and the heat dissipation assembly comprises a fixed-point heat dissipation part and an auxiliary heat dissipation part corresponding to a heat source area, and a liquid circulation system is integrated, so that multi-mode collaborative heat dissipation of the power supply is realized. Through active suction heat dissipation of the corrugated cover and contact type liquid cooling of the elastic water bag, the problem of local overheating is accurately and efficiently solved, the heat dissipation efficiency and temperature uniformity are remarkably improved, air cooling and liquid cooling work cooperatively, the overall heat dissipation capacity is enhanced, meanwhile, two-way buffering is formed through the pre-pressing water bag and the bottom elastic cushion during transportation of the same structure, and the heat dissipation efficiency is improved. And excellent anti-vibration and anti-impact protection is provided, heat dissipation and protection functions are integrated, and long-term high-stability operation of the high-voltage power supply is guaranteed.

Liquefied natural gas brings energy overriding and environmental disruption. However, the liquefied natural gas is a liquid dielectric medium, can be easily liquefied by pressurizing at room temperature, can be expanded by more than 250 times in volume during gasification, and is relatively high in dielectric constant and relatively low in voltage resistance. As a capacitor, such a liquid dielectric is considered; the energy of the liquid dielectric capacitor is consumed inside the capacitor for an engine, welding or buoyancy gas generation, or is consumed outside the capacitor for use as an on-board capacitor for a vehicle. [Solution] A liquid dielectric capacitor is considered as a dielectric breakdown induced igniter that can replace a conventional spark plug. In order to utilize the principle of such an igniter as an energy source for an engine, a welding device or a buoyancy bag for lifting a subsea resource, an electrical charge is applied to the liquid dielectric thin layer, and then the thickness of the liquid dielectric thin layer is made close to zero to cause dielectric breakdown, or the thickness of the liquid dielectric thin layer is increased to cause breakdown of the liquid dielectric thin layer. A high voltage source is established for a vehicle-mounted capacitor of the vehicle. Therefore, a world without environmental damage is realized.

The invention belongs to the technical field of power electronics, and particularly discloses a high-stability and high-dynamic-performance high-voltage power supply which comprises a main circuit, a detection circuit and a control circuit. The main circuit comprises a first LCC resonant converter module, a second LCC resonant converter module and a follow current resistor; the control circuit is used for taking the output voltage of the n LCC resonant converter sub-modules as a control quantity and changing the driving signal frequency, phase and duty ratio of the LCC resonant converter sub-modules; and the driving signal frequency, the phase and the duty ratio of the second LCC resonant converter module are obtained according to the driving signal frequency, the phase and the duty ratio of the n LCC resonant converter sub-modules, so that the output voltage amplitude of the second LCC resonant converter module is equal to the output voltage ripple amplitude of the first LCC resonant converter module. The high stability of the output voltage can be ensured while the response speed of the output voltage can be greatly improved.

The utility model relates to the related field of voltage reference circuits, in particular to a voltage reference circuit with a simple structure and capable of realizing high-voltage application, which comprises a resistor R5 connected with a high-voltage power supply, MOS (Metal Oxide Semiconductor) transistors PM1, PM2 and PM3, triodes Q0, Q1 and Q2, and MOS transistors NM0 and NM5, compared with a traditional structure, the circuit is simple in structure and easy to implement, and due to the fact that an operational amplifier and a band-gap reference circuit are not needed, and the number of electronic components is small, the circuit area is greatly reduced; the high-voltage-resistant voltage-reducing and voltage-stabilizing circuit is simple in structure, low in process requirement, free of a high-voltage process and free of additional special devices, adopts a low-voltage process to enable the circuit to generate a low-voltage reference capable of bearing a high-voltage power supply of more than 100V, achieves the purposes of high-voltage resistance, voltage reduction and voltage stabilization, and has the characteristics of low cost and convenience in design, so that the high-voltage-resistant voltage-reducing and voltage-stabilizing circuit has very high use value and application value and is suitable for popularization.

The invention belongs to the technical field of spinning, and particularly relates to atmosphere-controllable needleless electrostatic spinning equipment and a method for preparing micro-nano fibers. The equipment comprises a needleless electrode wire, a liquid brushing tank, a direct-current high-voltage power supply, a winding roller, a metal plate, an air inlet, a sliding rail, an air outlet and a closed outer cover. The needle-free electrode wire is connected with the liquid brushing groove in series and connected with the positive electrode of the direct-current high-voltage power source, the metal plate is arranged over the needle-free electrode wire and connected with the negative electrode of the direct-current high-voltage power source or grounded, and the air inlet can reciprocate on the sliding rail. The atmosphere-controllable needleless electrostatic spinning equipment is used for stabilizing jet flow, the fiber forming quality is improved, generated beads are reduced, it is ensured that fibers are uniform and fine, and the mechanical property and stability of the fibers are remarkably improved; one-step preparation of porous fibers and fibers needing secondary reaction modification is achieved, and the consistency of the fibers in the fiber membrane is improved.

The invention discloses a silicon carbide inverter and a control method thereof. The silicon carbide inverter mainly comprises a three-phase power frequency alternating current power supply input connection point, a three-phase rectifier filter of an integrated buffer circuit, two groups of silicon carbide MOSFET modules and driving circuits thereof, a programmable driving interconnection control module, an embedded controller and six independent output connection points. Wherein the silicon carbide MOSFET modules are divided into two groups, and each group is provided with six silicon carbide MOSFETs and corresponding driving circuits. The programmable drive interconnection control module can select working modes according to different enable signals, single-phase or three-phase alternating current inversion is achieved, and the high frequency of the silicon carbide MOSFET is calculated, optimized and controlled by combining the working temperature factor of the silicon carbide MOSFET. The embedded controller controls single-phase or three-phase alternating-current inversion of the silicon carbide MOSFET module, and monitoring and feedback closed-loop control can be carried out on operating parameters of the high-voltage power supply. The silicon carbide inverter realizes multi-mode selection control and intelligent safety efficiency control.

The invention discloses a current sampling circuit for collecting signals of a nuclear radiation detector and a high-voltage power supply, the current sampling circuit is arranged in the nuclear radiation detector comprising the high-voltage power supply, the high-voltage power supply comprises a voltage transformation assembly, and the current sampling circuit comprises a sampling resistance adjustable collecting unit and a resistance adjusting unit. The sampling resistance value adjustable acquisition unit is connected with the secondary side of the voltage transformation assembly, and the sampling resistance value adjustable acquisition unit is used for acquiring the voltage of the secondary side of the voltage transformation assembly and outputting the acquired voltage. And the resistance value adjusting unit is connected with the sampling resistance value adjustable acquisition unit and is used for controlling the sampling resistance value of the sampling resistance value adjustable acquisition unit to dynamically change until the sampling resistance value is stable according to the first voltage. Wherein the current of the nuclear radiation detector is the ratio of the target voltage to the target resistance value, the target resistance value is the sampling resistance value when the sampling resistance value adjustable acquisition unit adjusts the resistance value to be stable, and the target voltage is the voltage collected by the sampling resistance value adjustable acquisition unit under the target resistance value.

The present invention discloses an independent injection control method and injection device for an arrayed electrohydrodynamic nozzle, belonging to the technical field of inkjet printing. The injection device includes an electrohydrodynamic nozzle, a high-voltage power supply, a laser module, and a control module. The electrohydrodynamic nozzle is composed of an ink cartridge, a nozzle plate, and a nozzle. The high-voltage power supply is used to provide high voltage electricity to form an electric field driving force to eject the solution. The laser module generates laser for regulating the temperature of the liquid meniscus of the solution. The control module controls the opening and closing of the high-voltage power supply and the laser. The present invention regulates the temperature of the liquid meniscus at the tip of the nozzle by using a laser-induced method, changes the surface tension coefficient of the solution at the tip of the liquid meniscus through the change of temperature, realizes the adjustment between the electric field force and the surface tension, and further controls the independent injection of each nozzle. In this way, the present invention can realize the independent injection of each nozzle without changing the nozzle structure, and has the advantages of simple nozzle structure and convenient maintenance.

The utility model belongs to the field of dust removal and environmental protection of a coal-fired power plant, and particularly relates to a pre-charged adjustable high-voltage wire inlet system of an electric precipitator, which comprises a pre-charged device and a wall bushing which are arranged at the front end of the electric precipitator, the pre-charged device is provided with a high-voltage power supply, and the high-voltage power supply is provided with a double-switch disconnecting link and is connected with an insulating pillar through a high-voltage lead. Every two adjacent insulation supporting columns are connected through a rigid material, and the last insulation supporting column is connected with a wall bushing on a wall plate through a high-voltage wire and then connected with a pre-charging device to conduct power supply. According to the utility model, one high-voltage power supply is used for supplying power to the pre-charging devices arranged on the two or more loudspeakers, each pre-charging device can be independently disconnected without influencing the normal operation of other pre-charging devices and an electric field under the condition that a main power supply is not cut off, and on the premise that the pre-charging devices normally operate the required high-voltage power supply, the pre-charging devices can be independently disconnected. The construction cost is greatly saved, and the market competitiveness is improved.

The invention discloses an intelligent monitoring system for high-voltage power supply equipment, which belongs to the technical field of power distribution equipment monitoring and comprises three-in-one monitoring equipment including a temperature measuring device, a leakage current monitoring device and an ultrahigh-frequency partial discharge monitoring device. And data is transmitted to the wireless receiving unit through ultra-narrow-band wireless communication, and is finally summarized to a background intelligent data analysis platform, so that real-time monitoring and efficient and accurate judgment of the running state of the high-voltage equipment are realized. The system has the advantages of being high in intelligent degree, convenient to install, low in power consumption and the like, solves the problems that a traditional monitoring device is difficult to supply power, complex in wiring, unstable in data transmission and the like, and is suitable for state sensing and health management of large-scale high-voltage power distribution equipment. By using the system, field detection can be reduced, a large amount of manpower and material resources can be saved for power enterprises, the power facility management efficiency can be improved, the maintenance management level is improved, and stable operation of a power grid is ensured.

The invention belongs to the technical field of circuits, and relates to an output overcurrent protection circuit and method based on a multi-path output flyback high-voltage power supply. According to the invention, the current of the corresponding output branch is acquired in real time through the plurality of output current acquisition circuits; the output over-current trigger circuit is used for comparing the collected current data with a preset threshold value and triggering an over-current protection mechanism once the collected current data exceed the threshold value, and each output branch is provided with an independent output over-current trigger circuit, so that accurate control can be conveniently realized; the over-current protection response circuit is used for gathering all signals output from the over-current trigger circuit, uniformly processing an over-current protection request, and sending an over-current protection signal to the PWM pulse width modulation slow start circuit when the over-current protection request occurs to trigger a power supply protection measure; the PWM pulse width modulation slow start circuit is used for completing soft start of the power supply after output over-current protection occurs in the output branch of any multi-path output flyback high-voltage power supply. And after the soft start is completed, if the current returns to normal, continuing to supply power.

The invention discloses a fresh-keeping device, refrigeration equipment, a control method, a control device and a computer readable storage medium, and relates to the technical field of fresh-keeping, the fresh-keeping device comprises a fresh-keeping container and an electric field generating device, the fresh-keeping container is provided with a fresh-keeping space, and the electric field generating device comprises a high-voltage power supply module and an electrode assembly; the electrode assembly comprises a plurality of pole plates, at least two of the pole plates have the same polarity, all the pole plates with the same polarity are located on the same plane and are arranged in a concentric mode, and in the first working mode, the high-voltage power supply module drives all the pole plates with the same polarity to work; and in the second working mode, the high-voltage power supply module drives part of polar plates with the same polarity to work. The working mode of the fresh-keeping device can be selected according to different loads and temperature control programs, so that the working number of the polar plates is matched with the actual requirement. The polar plates with the same polarity are arranged in a ring shape and are concentrically arranged, so that the uniformity of the field intensity can be improved.