1047 results about "Constant voltage" patented technology

The invention discloses a control system for lithium battery power management, and relates to the field of lithium battery control, and the system comprises a voltage input module which is used for externally connecting voltage and supplying power to a battery power supply module and a time delay module; the battery power supply module is used for charging the battery; receiving the battery voltage information, and adjusting the voltage output to the battery according to the battery voltage; the battery module is used for a battery to store electric energy; compared with the prior art, the system has the beneficial effects that the output voltage of the battery power supply module is adjusted through the feedback module, the output voltage of the battery power supply module is relatively large at the beginning, and the charging voltage is reduced along with the increase of the battery voltage, so that a quick charging effect is constructed; whether battery charging is abnormal or not is detected through the time delay module and the charging fault detection module, the battery power supply module is adjusted to perform constant-voltage charging when charging is abnormal, and the battery charging effect is guaranteed.

The invention discloses a power battery health degree online evaluation method and system based on a charging curve, and the method comprises the steps: dynamically dividing a characteristic interval of a constant-current charging stage and a constant-voltage charging stage through monitoring the voltage and current data in a charging process in real time; extracting time domain and frequency domain characteristic parameters in the characteristic interval; inputting the time domain and frequency domain characteristic parameters into a health degree evaluation model subjected to transfer learning optimization, and generating a fusion health degree index at least comprising a battery capacity attenuation coefficient and an internal resistance change vector; and outputting a final health degree evaluation result and residual service life prediction through an adaptive weighting algorithm based on the fused health degree index in combination with historical cycle data and operating environment parameters of the battery. According to the embodiment of the invention, high-precision and non-intrusive online evaluation and life prediction of the health degree of the battery can be realized, and the real-time performance, accuracy and engineering applicability of evaluation are improved.

The invention discloses a lithium battery SOH prediction method fusing data driving and empirical model physical constraint. The lithium battery SOH prediction method comprises the steps of extracting a health feature vector based on current data in a constant-voltage charging stage from battery operation data; constructing a data driving model to establish nonlinear mapping between the health feature vector and the SOH, and outputting an SOH estimated value; constructing an empirical model to represent the physical decline trend of the SOH along with the number of cycles; in the online operation process, the deviation between an SOH estimated value and an SOH predicted value output by the empirical model is monitored, and when the deviation exceeds a preset threshold value, an SOH estimated value sequence in a historical time window serves as a target, and empirical model parameters are updated through an optimization algorithm to enable the empirical model parameters to approach the actual aging rate of the battery; on the basis of the SOH change rate represented by the updated empirical model, constructing a physical constraint item, fusing a training loss function of the data-driven model, and carrying out secondary training on the data-driven model to correct parameters; and utilizing the corrected data to drive the model, and outputting an SOH prediction result.

The invention relates to a packaging device with an electromagnetic shielding function and a forming method thereof. The packaging device with the electromagnetic shielding function comprises a substrate, the substrate comprises a front face and a back face which are oppositely distributed in the first direction, the substrate comprises a dielectric layer, a wiring layer and an electromagnetic shielding layer, the wiring layer and the electromagnetic shielding layer are located in the dielectric layer, the wiring layer comprises a plurality of signal transmission lines, at least one signal transmission line is a to-be-protected line, and the electromagnetic shielding layer is located in the dielectric layer; the electromagnetic shielding layer comprises at least one first electromagnetic shielding wire, the first electromagnetic shielding wire is located on the outer side of the to-be-protected wire, a first gap is formed between the first electromagnetic shielding wire and the to-be-protected wire, and the first electromagnetic shielding wire is grounded or electrically connected with constant voltage; and the chip is mounted on the front surface of the substrate, and the chip is electrically connected with the signal transmission line. According to the invention, the manufacturing process of the electromagnetic shielding layer is compatible with the manufacturing process of the wiring layer, and targeted independent shielding of a single wire is realized.

The invention relates to the technical field of charging optimization, and discloses a multi-stage charging optimization method based on adaptive identification of a battery, and the method comprises the following steps: S101, in-situ detection and battery type identification; step S102, applying a current step and collecting a voltage response; s103, predicting the change of the terminal voltage along with time; step S104, determining a safe amplitude limiting current; step S105, determining a pre-deceleration factor; and step S106, judging full power, generating a quota recovery instruction, and returning to the step S104 for redistribution. Battery individual parameters are obtained through in-situ detection and micro-pulse identification, current quotas are dynamically distributed based on a constant voltage proportion, a safe target current is determined by combining voltage and power amplitude limiting, current distribution unbalance is avoided, the bus current utilization rate is maximized, voltage overshoot is inhibited by means of a first-order following strategy and a pre-deceleration factor, and the safety of a battery is improved. And stable switching is ensured by matching with constant-voltage inlet current clamping.

The invention discloses a capacitor multi-stage adaptive flexible aging test method and system, and belongs to the technical field of industrial process advanced control. According to the method, voltage, current and temperature response data in the aging process of the capacitor are collected in real time by defining charging and discharging time sequences and initial parameters of four stages of preheating, constant current, constant voltage and resting; and comparing real-time data based on a preset model (an internal resistance change rate model and a temperature rise curve model), and dynamically adjusting power supply parameters in the next stage or triggering a protection mechanism. According to the method, the overstress or understress problem of a traditional fixed parameter test is solved, intelligent and personalized control of the aging process is realized, the test accuracy and the capacitor reliability are improved, and the method is suitable for aging test scenes of various capacitors.

The invention relates to the technical field of lithium battery management, and discloses an intelligent charging optimization control method for a lithium battery pack, and the method comprises the steps: S1, monitoring the multi-dimensional parameters of the lithium battery pack in real time, including the single voltage, the battery temperature, the environment temperature and the current charging current; s2, calculating the health state and the current charging efficiency of the battery pack based on the monitoring parameters; s3, dynamically generating an optimal charging curve according to the state of the battery pack, wherein the optimal charging curve comprises an adjustment strategy of charging current and charging voltage; s4, implementing multi-stage adaptive charging control, including a pre-charging stage, a constant-current charging stage and a constant-voltage charging stage; and S5, evaluating the safety state of the battery in real time in the charging process, wherein the safety state comprises thermal runaway risk and overcharge risk early warning. By monitoring the multi-dimensional parameters of the lithium battery pack in real time, comprehensive sensing of the battery state is realized, the problem of single monitoring parameter of a traditional method is solved, and a data basis is provided for intelligent charging control.

The invention relates to the technical field of charge and discharge detection, and discloses a multichannel EIS charge and discharge in-situ test system and method, and the system comprises a DC charge and discharge module which is used for carrying out the constant-current, constant-voltage or cyclic charge and discharge test of a battery; the alternating current impedance test module is connected in parallel with the direct current charging and discharging module and is used for applying an alternating current disturbance signal to the battery and collecting impedance response in the charging and discharging process; and the unified clock module is used for providing a synchronous triggering reference signal for the direct current charging and discharging module and the alternating current impedance test module. The direct current charging and discharging module and the alternating current impedance test module are designed to be of a parallel connection normally-connected structure, no relay switching is needed, continuous and uninterrupted online EIS test in the charging and discharging process is achieved, contact resistance drift and transient errors caused by physical circuit switching in a traditional scheme are effectively avoided, and the reliability of the EIS test is improved. And the stability and repeatability of the test are obviously improved.

The invention discloses a display panel and a display device. The display panel comprises a substrate and a plurality of pixel circuits located on the substrate. Each pixel circuit comprises a first capacitor and a second capacitor; the first capacitor comprises a first capacitor electrode and a second capacitor electrode, the second capacitor comprises a third capacitor electrode and a fourth capacitor electrode, the third capacitor electrode is electrically connected with the second capacitor electrode, and the fourth capacitor electrode is configured to receive a constant voltage signal. The overlapping area of the first capacitor electrode and the second capacitor electrode is different from the overlapping area of the third capacitor electrode and the fourth capacitor electrode. According to the overall layout design of the pixel circuit, the compensation effect of the threshold voltage is better, and meanwhile the size and the pixel resolution of the display panel are comprehensively considered.

The invention relates to the technical field of batteries, in particular to a battery capacity prediction method and system and a computer program product. The invention provides a battery capacity prediction method, which comprises the following steps of: obtaining a constant voltage stage time characteristic sequence of a battery, and inputting the constant voltage stage time characteristic sequence into a bidirectional long short-term memory network to obtain an initial prediction sequence; generating a capacity degradation sequence including battery capacity corresponding to the battery based on the capacity degradation model; constructing a mapping relation between the initial prediction sequence and the capacity degradation sequence through a dynamic time warping strategy; determining a target prediction residual error through a particle filtering model and based on the initial prediction sequence and the capacity degradation sequence which have the mapping relation; and correcting the initial prediction sequence through the target prediction residual error to obtain a capacity prediction value. The problem of reference correction error caused by time migration in a traditional battery capacity prediction method is solved, and the prediction precision and long-term stability in a capacity jump scene are improved.

Disclosed herein are methods for producing electrodes comprising single-layer 1T′-transition metal dichalcogenide (TMD) nanosheets. The method includes filtering a suspension of single-layer 1T′-TMD nanosheets over a polymeric substrate to produce the electrode, wherein, the single-layer 1T′-TMD nanosheets of the electrode are no more than 1,000 nm in thickness; the electrode comprises at least 70% 1T′-phase; and the electrode has a calculated electrochemical active surface area (ECSA) that is about 10-fold higher than that of a control electrode, which comprises 2H-TMD nanosheets. Also disclosed herein are methods for deionizing a fluid. The method includes steps of discharging the fluid in an electrochemical capacitor at a constant voltage of no more than 0.5 V to deionize the fluid, wherein the electrochemical capacitor is characterized in having the electrode comprising single-layer 1T′-TMD nanosheets produced by the present method.

The invention discloses a charging management circuit and a charger. The charging management circuit comprises a flyback converter, a first sampling feedback module, a second sampling feedback module and an optocoupler. The first sampling feedback module comprises a comparator, a first switch unit, a thermosensitive voltage dividing unit and a current sampling resistor. The duty ratio of a PWM chip is controlled through an optocoupler to achieve constant-current charging in the first charging stage. The resistance of the thermosensitive voltage dividing unit is increased when the temperature rises, the charging current is automatically reduced, and temperature self-adaptive protection is achieved. And when the charging current is reduced to a preset value, the second sampling feedback module takes over the control optocoupler to realize constant-voltage charging in a second charging stage. Constant-current and constant-voltage two-stage charging can be achieved, the function of automatically adjusting the charging current through the temperature is achieved, the charger is effectively prevented from being overheated in the high-temperature environment, and the safety of the charger and a battery is protected.

The invention relates to the technical field of charging pile control, in particular to an intelligent charging control method and system for a charging pile. The method includes: acquiring running state information of a power component in the charging pile; when the charging pile is switched from the constant-current charging mode to the constant-voltage charging mode, generating a power regulation strategy instruction executed by the charging pile according to the health state evaluation value, and transmitting the running state information and the power regulation strategy instruction to a battery management system of the vehicle; and the battery management system of the vehicle receives the operation state information and the power adjustment strategy indication, and adjusts the judgment logic of the battery management system on the power output fluctuation of the charging pile according to the health state evaluation value, the expected power fluctuation range and the power adjustment strategy indication. The problems that in the long-term operation of an existing charging pile, performance degradation of internal power components causes charging stability decline, and especially when a constant-voltage mode is switched to a constant-voltage mode, misjudgment of a vehicle battery management system is likely to happen, and charging is interrupted are solved.

A battery management system includes a sensing unit to generate a sensing signal indicating a battery voltage and a battery current of a battery, a memory unit to store a charge map recording a correlation between first to nth reference state of charge (SOC) ranges, first to nth reference currents and first to nth reference voltages for multi-stage constant-current charging, and a control unit to change to constant voltage charging using a kth reference voltage corresponding to a kth reference SOC range in response to the battery voltage having reached the kth reference voltage during constant current charging using a kth reference current corresponding to the kth reference SOC range to which an SOC of the battery belongs. The control unit updates the kth reference current of the charge map based on a time-series of the battery current in a charging period of the constant voltage charging.

The invention relates to the technical field of image data processing, in particular to a method and system for predicting the service life of a mining anti-explosion lithium ion battery, and the method comprises the steps: collecting a thermogram of the surface of a battery at a constant-voltage stage at the last stage of charging; based on the gray extreme value difference in the pixel point neighborhood, geometric thermal complexity is calculated; identifying high-gradient pixel points, and constructing a thermal intensity factor in combination with distance distribution characteristics, geometric thermal complexity and global gradient characteristics of the high-gradient pixel points; calculating an initial fractal dimension of the thermogram, and correcting the initial fractal dimension according to the thermal intensity factor to obtain an adaptive fractal dimension; and predicting the service life based on the mapping relation between the adaptive fractal dimension and the battery health state. According to the method, the fractal dimension is corrected by using the thermal intensity factor, so that thermal deposition interference and battery cell aging thermal anomaly caused by heat dissipation lag of the explosion-proof shell are effectively distinguished, and the problems of misjudgment and missed judgment of prediction of the battery life in a complex thermal environment are solved.

A positive electrode active material that enables an increased discharge capacity retention rate of cycling performance is provided. A secondary battery includes a positive electrode pressed under a linear pressure higher than or equal to 100 kN / m and lower than or equal to 3000 kN / m and a negative electrode. When a test battery that includes the positive electrode and a negative electrode containing lithium undergoes, in an environment at higher than or equal to 25° C. and lower than or equal to 45° C., a cycling test of 50 repetitions of a cycle of charging and discharging in which, after constant current charging is performed at a charge rate of 0.5 C (1 C=200 mA / g) until a voltage of 4.7 V is reached, constant voltage charging is performed until the charge rate reaches 0.05 C at a voltage of 4.7 V, and then constant current discharging is performed at a discharge rate of 0.5 C until a voltage of 2.5 V is reached, and the discharge capacity of the battery is measured in each cycle, a discharge capacity value measured in the 50th cycle is greater than or equal to 35% and less than 100% of the maximum discharge capacity value in all the 50 cycles.

The invention discloses a hybrid parallel direct-current power supply system, a charge and discharge control method and a medium, and the system comprises the hybrid parallel direct-current power supply system which comprises a direct-current bus; the power conversion module comprises two groups of three-port converters and a plurality of groups of two-port converters, the three-port converters are connected in parallel with super capacitor banks and a storage battery pack, the storage battery pack comprises a plurality of storage batteries which are connected in series, the two super capacitor banks are connected in series and then connected with the direct current bus, and the two-port converters are connected with the storage battery pack; a three-port converter, wherein the two-port converter is electrically connected with the direct current bus; and the charging and discharging control module is electrically connected with the battery conversion module so as to control the battery conversion module to realize a constant-current, constant-voltage and floating-charge staged charging strategy and an anti-interference discharging strategy. According to the invention, the complementation of the short-time / instantaneous power fluctuation of the super-capacitor compensation direct-current bus and the long-time power fluctuation of the storage battery compensation direct-current bus is realized.

The application discloses an amorphous silicon dioxide coating prepared based on micro-arc oxidation, a preparation method and application thereof, and belongs to the technical field of metal surface protection and silicon dioxide coating. In the application, a magnesium alloy, an aluminum alloy, a titanium alloy, a titanium-aluminum base and a nickel-aluminum base are used as anodes and are placed in a micro-arc oxidation tank, a hydrolytic solution of organic silicon is used as an electrolyte, and an amorphous silicon dioxide coating with a thickness of more than 100 mu m can be prepared within 20 minutes through a step-by-step step-incremental constant potential control means. The application utilizes the advantages of the micro-arc oxidation process and the sol-gel process, avoids their shortcomings, and realizes the superimposed synergistic effect of "1+1>2". The process steps of the application are simple, and the application is very suitable for full-automatic operation and processing in industry. The amorphous silicon dioxide coating with the required thickness, wear resistance, corrosion resistance, erosion resistance, oxidation resistance and other characteristics can be prepared by changing the electrolyte concentration, the micro-arc oxidation time and the electric control parameters, or through the conventional micro-arc oxidation constant voltage and constant current control means.

The invention relates to the technical field of new energy and energy storage, and provides a renewable energy hydrogen production control system based on dynamic power matching and hydrogen storage collaboration, which comprises a power conversion system with a constant voltage mode and constant power mode millisecond switching capability; the modularized electrolytic cell array is formed by connecting a plurality of proton exchange membrane electrolytic cells in parallel; the hydrogen storage cooperation unit comprises a high-pressure hydrogen storage tank group, a solid oxide fuel cell and a hydrogen purification device; the intelligent control unit is used for executing a three-stage control strategy; the real-time control layer is used for executing proton exchange membrane electrolytic cell power instruction tracking and power grid frequency deviation compensation; the optimization scheduling layer adopts a reinforcement learning model prediction control algorithm to perform rolling optimization on the power distribution proportion of hydrogen production and power generation; and the planning layer is used for generating a proton exchange membrane electrolytic cell start-stop plan and a hydrogen storage scheduling plan in combination with meteorological prediction and electricity market transaction data. The problems that wind-solar power generation fluctuation is large, and a traditional hydrogen production system is slow in response and insufficient in economical efficiency can be solved.

The present invention relates to the technical field of wireless power transfer (WPT). Specifically disclosed is a WPT system for realizing constant current and constant voltage output on the basis of a variable-structure hybrid topology. A variable-structure hybrid topology is designed, wherein input ends of CLC-S-type and S-CLC-type topologies are connected in series, and output ends of the CLC-S-type and S-CLC-type topologies are connected in parallel to form a front-stage circuit which is mainly used for improving the system misalignment tolerance; on this basis, a variable-structure T-type compensation topology is incorporated at an output end to form a rear-stage T-type circuit, and constant-current / constant-voltage switching is achieved by changing the structure of the rear-stage T-type circuit. Moreover, in order to improve the system misalignment tolerance, a system compensation parameter is designed. Experiments have verified that the WPT system for realizing constant current and constant voltage output on the basis of a variable-structure hybrid topology provided by the present invention can realize constant-current / constant-voltage switching, and has high misalignment tolerance in both a constant voltage mode and a constant current mode.

A temperature sensor device is capable of measuring minute temperature changes while being manufactured at low cost without needing a high performance IC tester. A temperature sensor device includes a temperature sensor circuit 2 and a temperature sensor 1. The temperature sensor 1 includes a PN junction element 15 which is a temperature sensing element, a variable current source which supplies different forward currents of at least two values to the PN junction element 15 and a constant voltage source 16 which outputs a constant voltage having the same temperature properties as a forward voltage of the PN junction element 15.

The invention discloses a hybrid self-switching bidirectional wireless switched reluctance motor driving system provided and realized by the invention. An independent demagnetization loop is arranged on the motor side, rapid demagnetization is allowed, and energy recovery is achieved. The system wirelessly drives a multi-phase SRM through a single power transfer channel using a single resonant frequency to reduce coupling between multiple power channels. When the WPT system is in forward power, the LCC-S compensation network is adopted to drive the motor load, and the advantage of constant voltage gain when the load changes is achieved; the LCC-LCC / S hybrid self-switching compensation network is adopted to realize charging of a battery load, and has a constant voltage / constant current characteristic; and when the WPT system has negative power, the LCC-LCC compensation network is adopted to realize reverse recovery of energy, and energy interconnection between the motor and the power grid is realized. In addition, an SR motor does not need to be specially designed, and the system has the remarkable advantages of phase current balance, flexible transmission distance, high integration level, maintenance-free property and the like.

The present application relates to a kind of lithium ion battery pack online floating charge method, comprising the following contents: when lithium battery pack is charged to 100%SOC, the charging voltage of charging equipment is adjusted to floating voltage V floating;When lithium battery pack is in discharge state, and the SOC of lithium battery pack is less than 90%, the working state of charging equipment is adjusted to constant-current charging to SOC reaches 90%, and then long-term floating is charged with floating voltage V floatingThe present application is measured and calibrated floating voltage V floating by long-time standing voltage under multiple working conditions, avoids the problems such as battery overcharge, positive material phase transition, internal resistance rise caused by traditional fixed high-voltage floating, greatly reduces the damage of long-term floating to battery, effectively improves the cycle service life of lithium ion battery pack in online scene such as UPS, base station, standby power supply and the like.

The invention provides an output voltage automatic regulation circuit and an illumination lamp, and the circuit comprises a constant voltage module which is used for converting an external alternating current into a constant voltage direct current; the linear constant current module is used for converting the constant voltage direct current into constant current; a voltage threshold value is set in the MCU control module, and the MCU control module is used for detecting the voltage to ground of the linear constant current module and outputting a PWM signal with a corresponding duty ratio according to a comparison result of the voltage to ground and the voltage threshold value; and the constant-voltage loop regulation module is connected in series between the MCU control module and the constant-voltage module and is used for receiving the PWM signal and carrying out voltage division and RC filtering on the PWM signal to obtain a processing voltage, and the processing voltage is used as a reference voltage of an operational amplifier in the constant-voltage loop regulation module. Compared with the prior art, the output voltage of the constant-voltage module can be intelligently and dynamically adjusted in real time, the loss of the linear constant-current module is reduced, and the purposes of improving the driving efficiency and reducing heating are achieved.

The present application relates to the field of electrical engineering, in particular to a kind of full DC power supply system suitable for pulse load characteristics.The system includes control unit, chassis engine, generator, rectifier unit, energy storage unit and distribution unit;Wherein, rectifier unit uses uncontrolled rectification+BUCK type step-down topology, and constant voltage control strategy, specifically: double-loop control mode of outer ring voltage control+inner ring current control, output DC 600V DC bus is stabilized at set voltage value, realizes the constant voltage control of output voltage.Solve the energy supply problem of equipment single vehicle operation, and the problem that traditional electric car system constant current strategy and equipment pulse load are difficult to match.Using the power supply structure of rectifier unit+energy storage unit (capacitor), remove lithium battery in traditional electric drive system, avoid the safety problem of lithium battery, and the system safety is high.

The invention belongs to the technical field of preparation of nano silicon materials, and particularly relates to a method for preparing nano silicon by etching a silicon-aluminum alloy and a nano silicon material thereof. Comprising the following steps: placing a pretreated silicon-aluminum alloy sample wafer in an etching tank containing a main etching solution, etching under the action of an alternating pulse electric field and ultrasonic-megasonic coupling, and adjusting the pH value to 2.5-3.0 by using acetic acid; quickly washing the silicon-aluminum alloy sample wafer subjected to main etching, putting the silicon-aluminum alloy sample wafer into an electrolytic cell containing a composite buffer solution of oxalic acid and sulfuric acid, and performing electrochemical fine etching under a direct-current constant-voltage electric field; and when the etching current density is reduced to 10% of the initial value, the reaction is terminated, and after low-temperature treatment and low-temperature vacuum drying, the nano silicon material with the residual Al content of 8-12 wt% and the O / Si atomic ratio of 0.15-0.25 is obtained. According to the invention, the problems of out-of-control components, structural damage and serious pollution in the prior art are solved, and the nano silicon material with controllable residual aluminum element and low oxygen-silica ratio can be stably prepared.

This application provides a current limiting protection method and system for a variable speed constant frequency device. The method includes: First, the variable speed constant frequency device operates in a constant voltage state during normal operation; Second, it determines whether a hardware overcurrent protection event has occurred. If so, it proceeds to the third step; otherwise, it returns to the first step; Third, it performs a fault reset and automatically restarts the variable speed constant frequency device to operate in a constant current state. Furthermore, after operating in this constant current state, it determines whether the hardware overcurrent protection event is caused by a short circuit, overload, or other temporary sudden anomaly. If it is a short circuit, it maintains a preset current output for a certain duration, allowing the downstream circuit time to switch power and maintain circuit stability. If it is an overload, it performs overload protection and shuts down to prevent circuit damage. If it is neither a short circuit nor an overload, it is generally a temporary sudden anomaly, and it can switch back to operating in a constant voltage state.

The invention relates to the technical field of lighting electronics, and discloses an LED (light-emitting diode) portable lighting device supporting AC100-240V charging, which comprises an alternating current input interface, a rectification filter circuit, an AC / DC (alternating current / direct current) conversion circuit, a lithium battery power supply and charging management circuit, an LED lighting unit and a control module, the voltage is input to the AC / DC conversion circuit, and stable direct-current voltage is output through high-frequency voltage transformation and constant-voltage control; the AC / DC conversion circuit comprises a power switch tube, a transformer, an optocoupler feedback device and a control chip. Through AC100-240V wide-voltage input, the lighting device adapts to power grid environments of different regions, is high in compatibility, and is matched with a rectifying and filtering circuit and an AC / DC conversion circuit, so that the lighting device can still keep stable output when the input voltage fluctuates, stable and reliable lighting and charging performance is ensured, and the use convenience is improved.

A radio frequency (RF) dielectric heating system includes a solid-state RF power generator, a matching network electrically coupled to the RF power generator, and a dielectric heating applicator electrically coupled to the matching network and including electrodes for applying RF power to a dielectric material. A solid-state RF power generator can include a power supply, an RF power amplifier stage electrically coupled to the power supply, and a control system electrically coupled to and configured to control the RF power amplifier stage. The control system can be configured to regulate an output voltage of the RF power generator to provide a constant RF power generator output current to maintain a constant voltage across the applicator electrodes. Examples of RF power generators and methods for RF dielectric heating are also disclosed.

The embodiment of the invention discloses an insulator pollution flashover test method considering the property of a pollution source, and the method comprises the steps: carrying out the pollution treatment of a sample insulator according to the property of the pollution source, and obtaining a test insulator; arranging the test object insulator and a test environment thereof; applying low voltage and steam mist to the test object insulator to enable the test object insulator to reach a saturated wet state; according to the method, a pollution test is carried out on the test object insulator by adopting a gradually-decreasing constant voltage method to obtain the flashover voltage of the test object insulator, the test object insulator can be smeared in a targeted manner according to the pollution source property of a certain area, and then the flashover voltage is obtained through the test, so that the representativeness and typicality of the test are improved, and more accurate test data are obtained; and guidance is provided for insulation configuration and operation maintenance of the power transmission line in the region.