2453 results about "Frequency changer" patented technology

The invention relates to the field of frequency converter fault detection, and discloses a frequency converter fault prediction method and system based on machine learning, and the method comprises the steps: obtaining multi-dimensional real-time data in the operation process of a frequency converter; constructing a dynamic mapping relation to obtain a basic feature set; generating a time sequence feature vector capable of reflecting the state change of the equipment based on the basic feature set; comparing, analyzing and judging whether the equipment state deviates from a normal operation interval or not based on the historical operation data and the time sequence feature vector, and outputting a state deviation index; performing abnormal fluctuation judgment on the time sequence feature vector; extracting fluctuation amplitude and frequency characteristics of the key indexes to obtain quantitative description data of abnormal fluctuation; inputting the quantitative description data of the abnormal fluctuation into an abnormal prediction model; and generating a coping strategy and a triggering condition of the coping strategy based on the risk prediction result. The method has the advantages that the abnormal state of the frequency converter is recognized in time, and potential risks are predicted.

The invention provides an automatic energy-saving control method and device for a ring cooling fan based on load feedback, relates to the field of ring cooling fans, and solves the technical problem of delay of regulation and control in an energy-saving working state. The method comprises the steps that working condition data are input into a preset powder box model, and a feed-forward air volume instruction is obtained through calculation; and inputting the working condition data into a state observer to obtain an optimal estimated temperature value. And the deviation between the optimal estimated temperature value and a preset temperature set value is calculated, and a feedback air volume compensation instruction is obtained through calculation of a feedback controller according to the deviation. And fusing the feed-forward air volume instruction and the feedback air volume compensation instruction to obtain a final air volume control instruction, and issuing the final air volume control instruction to a fan frequency converter for execution. And continuously monitoring the numerical value and the change trend of the feedback air volume compensation instruction, taking the feedback air volume compensation instruction as a prediction error signal of the powder box model, and adaptively adjusting key thermal parameters in the powder box model. The method is used in the control process of the ring cooling fan.

The invention provides a split type direct-current charging pile liquid cooling heat dissipation system, and belongs to the technical field of direct-current charging piles, a closed liquid cooling circulation system is constructed through equipment such as a liquid cooling circulation pump, a radiator assembly and a temperature sensor array, and active temperature control is realized by adopting a temperature pre-adjusting module as a core. The system firstly collects power and temperature data to establish a power heat effect function to describe a power-temperature relationship, and extracts temperature time sequence characteristics through a heat situation sensing model by adopting an improved time sequence convolutional network to configure a self-adaptive receptive field adjustment mechanism to capture different time scale change modes; and constructing a double-layer optimization framework in combination with a temperature control game model to solve a Nash equilibrium solution, and calculating an optimal cooling adjustment vector including advanced cooling time and cooling power parameters. And a change curve is generated through real-time monitoring and dynamic correction and is converted into a control instruction, the frequency converter is controlled to adjust the rotating speed of the circulating pump and the opening of the flow valve, and advanced adjustment before temperature change is achieved to eliminate response lag.

The invention discloses a hierarchical cooperative control method for a cascaded H-bridge frequency converter, and the method comprises the steps: distributing a disturbance signal following a spiral phase coding rule for each H-bridge unit, and enabling the vector sum of the phase of the group of signals to generate a plurality of energy quasi-zero moments in a preset disturbance period through design; at the quasi-zero moment when the energy is greatly suppressed, synchronously triggering all units to perform high signal-to-noise ratio data acquisition, and accurately identifying transient parameters representing dynamic characteristics of each unit based on the acquired data; and finally, performing closed-loop adjustment on an upper-layer power distribution strategy, a bottom-layer current loop and the like according to the identified transient parameters so as to compensate the dynamic response difference of each unit. According to the method, high-precision online parameter identification can be realized on the premise of not influencing stable operation of the system, and the power balance capability and transient stability of the system are remarkably improved.

The invention belongs to the technical field of permanent magnetization remanufacturing, and particularly relates to a permanent magnetization regeneration method for a waste motor of copper alloy wire processing equipment, and the method comprises the steps: disassembling a waste asynchronous motor, and reserving a case, a stator, a rotor core and a rotating shaft which are not damaged; the specifications of the air injection channels are determined according to the diameter of the rotating shaft, more than two air injection channels are arranged on the rotating shaft at equal-angle intervals, and then the rotating shaft is installed in the machine shell; the rotor core is split to obtain steel sheets, and permanent magnet grooves, magnetic isolation air grooves and air injection channel grooves are formed in the steel sheets; the permanent magnets are assembled in the permanent magnet grooves, then the steel sheets are laminated according to a first rule to obtain a rotor, and then the rotor is assembled to the rotating shaft; a rear end cover of the machine shell is removed, a heat dissipation machine cover is manufactured according to the diameter of the rear end cover, a bearing groove and an air outlet hole are formed in the heat dissipation machine cover, and then the heat dissipation machine cover is assembled to the machine shell; and a frequency converter is additionally arranged on the shell. The remanufactured permanent magnet synchronous motor manufactured by the method has better sealing performance and heat dissipation performance.

The invention provides an intelligent management method and system for global environmental control heat dissipation of a wind power plant, and is applied to the technical field of data processing. According to the application, wind power plant equipment operation and environment parameters are obtained, a global environment control sensing module is used, a core equipment state is monitored by means of multi-sensor fusion, and an equipment-environment association model is constructed to obtain a preliminary heat dissipation demand; an intelligent heat dissipation regulation and control module optimizes a strategy to generate a precise control instruction; the frequency converter fault-free management module dynamically adjusts parameters to form fault-free management information; coordinating equipment linkage through a joint optimization strategy to generate a global environment control scheme; and finally, the operation efficiency evaluation module outputs evaluation information containing efficiency and a safety coefficient, so that intelligent management of heat dissipation of the wind power plant is realized.

The invention discloses a heat dissipation control method, device and system based on an array chip and a medium. The method comprises the steps that the basic valve opening degree is determined based on the temperature value of any partition and a valve opening degree mapping table; determining a target valve opening degree of each electric valve based on the basic valve opening degree and a spray coverage overlapping model, and sending the target valve opening degree to each electric valve; calculating a target total flow based on all target valve opening degrees, adjusting the rotating speed of a liquid supply pump through a frequency converter, and enabling a measured value of a flow sensor to be the target total flow; determining a target pressure value based on the saturation temperature of the cooling liquid, and adjusting the power of the vacuum pump or the three-way vacuum electromagnetic valve to enable the pressure value of the evaporation cavity to be the target pressure value. According to the method, three-layer linkage logic of partition precise temperature control, system flow coordination and global pressure setting is established, scattered devices are integrated into a whole, overall adjustment of the system level is achieved during heat dissipation control, instructions do not need to be sent frequently to control each valve, and the electric energy consumption of the system is reduced.

The invention relates to the technical field of industrial compressed air system intelligent control, in particular to a digital air compression station intelligent control method and system based on AI self-learning, and the system comprises a data collection layer, an AI prediction layer, an optimization control layer and an execution layer. The data acquisition layer realizes accurate acquisition and preprocessing of multi-dimensional data through a three-stage high-precision sensor network and an edge computing node; the AI prediction layer adopts an XGBoost and LSTM mixed model to be combined with an online learning mechanism to realize accurate prediction of the gas consumption demand and the energy efficiency ratio within 1-24 hours; the optimization control layer completes air compressor operation combination optimization and pressure dynamic control based on an improved NSGA-II algorithm and self-adaptive PID adjustment; the execution layer realizes control instruction landing through frequency converter and cluster cooperative scheduling. Meanwhile, an equipment health degree monitoring module, a multi-source data fusion correction module and a waste heat-gas consumption collaborative optimization module are innovatively introduced, and the problems that a traditional air compression station is low in energy efficiency, poor in self-adaption, insufficient in prediction precision and lack of equipment management are solved.

The invention provides an electromagnetic interference motor-driven frequency converter control method and system and a medium, and relates to the field of motor control, and the method comprises the steps: collecting an electromagnetic interference signal in real time during the operation of a motor-driven frequency converter, generating interference spectrum data, carrying out the dynamic switching adjustment of the frequency converter, and generating an anti-interference modulation instruction; reconstructing a pulse waveform according to the anti-interference modulation instruction to carry out harmonic compensation, carrying out feedback verification based on the optimized driving signal, carrying out electromagnetic interference judgment according to a motor torque fluctuation value, and generating a judgment result; and triggering a parameter updating instruction based on the judgment result, and driving a frequency converter to perform adaptive control through the parameter updating instruction to generate a frequency conversion control result. The technical problem that a frequency converter control method in the prior art is limited in resistance to electromagnetic interference and affects the running stability of a motor is solved. The technical effects of improving the electromagnetic interference suppression capability and ensuring the stable and reliable operation of the motor are achieved.

The invention discloses a full-power variable-speed pumped storage unit stator winding insulation state online monitoring method, and provides a high-capacity generator unit stator winding insulation state online monitoring method which can be applied to a network side transformer neutral point ungrounded system. According to the method, an effective common-mode monitoring loop can be established, and monitoring is carried out by utilizing the third harmonic of the motor stator winding and is not interfered by the high-frequency switch harmonic of the frequency converter. In order to solve the problem that a full-power variable-speed pumped storage unit generally has large capacity and is not easy to realize online measurement, the invention provides a method for measuring on a neutral point outgoing line, which can realize online measurement of the insulation state of a stator winding when the load current is relatively large. The method is suitable for a full-power variable-speed pumped storage high-capacity unit, leakage current measurement can be carried out under the condition of large load current, and stator insulation information online monitoring is achieved.

The invention provides an energy consumption optimization method and system for mine ventilation, relates to the technical field of mine ventilation, and solves the technical problems that an existing mine ventilation system is too high in energy consumption and uneven in air distribution. The method comprises the following steps: acquiring environment data in real time through a sensor network; simulating air volume distribution in a mine by using a digital twinborn model, and inputting the environmental data into a space-time diagram convolutional network to predict a ventilation demand; performing global optimization by adopting a dynamic weight multi-objective optimization algorithm according to the air volume distribution and the ventilation demand, and generating a multi-fan cooperative control instruction; the control instruction is issued to a frequency converter and a PLC, fan rotating speed adjustment is executed, and a fault diagnosis mechanism is integrated to achieve redundancy switching; and feeding back the execution effect to the digital twinborn model for iterative optimization. The method is used for ventilation system design, operation and maintenance links in various underground mineral exploitation scenes.

The invention discloses a multi-branch industrial ventilation intelligent regulation and control system and method based on a PLC. According to the system, a closed-loop control network is formed by an infrared sensor, a wind speed sensor, a PLC (Programmable Logic Controller), an air door control cabinet, an electric valve, a frequency converter, a frequency conversion fan and an upper computer. The infrared sensor is responsible for monitoring the running state of each production line in real time. The wind speed sensor is used for detecting the wind speed in the wind pipe and verifying wind quantity balance. The PLC processes all sensor data and outputs a control instruction. On one hand, the opening degree of the electric valve is adjusted through the air door control cabinet, and on the other hand, the rotating speed of the fan is adjusted in real time through the frequency converter. The upper computer is used for system parameter monitoring, threshold setting and data interaction with the manufacturing execution system. According to the system, on-demand adjustment of multi-branch ventilation is achieved through intelligent closed-loop control, the problem of response lag of a traditional control mode is effectively solved, the dust removal efficiency and the energy utilization rate are remarkably improved, and safe and efficient operation of the industrial environment is guaranteed.

The invention relates to the technical field of industrial automatic control, in particular to an air compressor circulation control system based on an LSTM deep learning network, which comprises a data acquisition unit, an LSTM prediction and decision unit, an execution control unit and an upper monitoring and interaction unit. According to the method, through multi-source data fusion, attention mechanism feature screening, LSTM time sequence modeling and reinforcement learning optimization, accurate prediction of the operation state of the air compressor and generation of the optimal control strategy giving consideration to energy efficiency and stability are achieved, control safety is guaranteed by means of digital twin virtual verification, the execution dynamic state is optimized in combination with an MPC adaptive algorithm, and the optimal control strategy is obtained. A physical execution mechanism is precisely driven through a PLC or a frequency converter, it is ensured that a control strategy is reliable, full-process supervision and knowledge graph diagnosis are achieved through visual display, an intelligent maintenance scheme is generated, man-machine interaction supports flexible operation, data storage backtracking assists analysis and tracing, and the system is high in practicability. And the intelligent level, the control precision and the operation and maintenance efficiency of operation of the air compressor are remarkably improved.

The invention discloses a marine frequency converter intelligent cooling system based on integrated modularization, relates to the technical field of ship power electronic equipment heat dissipation, and discloses the marine frequency converter intelligent cooling system based on integrated modularization. Comprising five core modules, wherein a data acquisition module is responsible for acquiring and preprocessing temperature, humidity and salt mist concentration data; the route analysis and model establishment module establishes and optimizes a model for predicting future environmental parameters by analyzing a route and applying a random forest algorithm; the threshold value calculation and optimization module calculates a dynamic threshold value in real time and continuously adjusts according to the ship speed and environmental parameters to continuously optimize threshold value parameters; the mode processing and conversion module identifies an extreme environment combination, triggers corresponding processing measures, and smoothly adjusts processing parameters and modes; and the route adjustment and safety protection module sets an intermediate value and an adjustment curve, continuously monitors the state, and automatically gives an alarm and takes measures when a fault or an abnormality occurs.

The invention discloses a variable-speed water pump energy consumption model correction method, and relates to the technical field of fluid mechanical energy efficiency optimization. The problems that an existing water pump energy consumption model is low in prediction precision and poor in adaptability due to efficiency parameter solidification, insufficient working condition data coverage and lack of dynamic correction capacity are solved. The method comprises the steps of establishing a water pump energy consumption model; acquiring wide-range water pump energy consumption and related parameters for water pump modeling at different rotating speeds; establishing a water pump efficiency model and a water pump efficiency correction coefficient model; establishing a water pump motor efficiency model and a frequency converter efficiency model; obtaining the actual operation flow and lift of the water pump, and predicting the energy consumption of the water pump by using the corrected water pump energy consumption model.

The invention provides a load balance control system of a converter tilting device and a control method thereof, and belongs to the field of converter control. The control system comprises a plurality of motors including a first motor and a second motor; the plurality of feedback encoders, the plurality of controllers and the plurality of frequency converters correspond to the plurality of motors; the motor feedback encoders are arranged on rotating shafts of all the motors and used for obtaining the first rotating speed and the second rotating speed; the master controller is used for generating an integral component and a first control reference value, and the slave controller is used for generating a second control reference value; the frequency converters are in data communication connection, the main frequency converter is used for synchronizing integral components to the driven frequency converter, and the main frequency converter and the driven frequency converter are respectively used for controlling the first motor and the second motor to execute first and second control reference values. The method is mainly used for solving the problems of overload, reverse dragging, unstable control and the like caused by non-uniform load distribution when the converter is driven by multiple motors to tilt, the tilting stability is improved, and the wear rate of equipment is reduced.

The utility model discloses a full-automatic operation control system for filter pressing, water washing and squeezing of a diaphragm filter press, which is characterized in that an inlet of a slurry liquid filter pressing pump is connected with a to-be-pressed filtrate storage tank, an outlet of the slurry liquid filter pressing pump is connected with a liquid inlet of the filter press through a liquid inlet valve V1, and an inlet of an on-machine water washing filter pressing pump is connected with an on-machine washing water storage tank; the outlet is connected with the water inlet of the filter press through a water inlet valve V3; an inlet of the squeezing water delivery pump is connected with the squeezing water tank, an outlet of the squeezing water delivery pump is connected with the filter press, the front end of the pulp filter press pump and the front end of the squeezing water delivery pump are respectively provided with the frequency converter, and the pulp filter press pump, the filter press, the on-machine washing filter press pump, the squeezing water delivery pump, the liquid inlet valve V1 and the water inlet valve V3 are respectively connected into the control cabinet. And the control cabinet is used for controlling the starting, stopping and switching of the slurry filter press pump, the filter press, the on-machine washing filter press pump, the squeezed water delivery pump, the liquid inlet valve V1 and the water inlet valve V3. According to the utility model, full-automatic start-stop switching control of filter pressing, water washing and squeezing of the diaphragm filter press in hydrometallurgy can be realized.

The invention discloses a wind power generation fault on-line detection method and system based on multi-frequency-converter cooperation, and relates to the technical field of frequency converters, and the method comprises the steps: connecting U frequency converters, and collecting real-time operation parameters; obtaining a first connection state sequence of each wind power generation assembly corresponding to a first frequency converter in the U frequency converters; traversing the U frequency converters to obtain U connection state sequences, combining with historical fault examples, setting fault feature vectors, constructing a fault diagnosis model, and performing fault reasoning; based on the fault diagnosis model, in the wind power generation topological graph, setting V health state evaluation nodes, uploading real-time operation parameters, and carrying out optimal configuration; and configuring a fault diagnosis mechanism of the U frequency converters by using the V health state evaluation nodes. The technical problems of low efficiency and poor accuracy of frequency converter fault diagnosis in the prior art are solved, and the technical effect of improving the efficiency and accuracy of fault diagnosis is achieved by monitoring and analyzing the operation state of the frequency converter in real time.

The invention relates to the field of UHPC stirring machine control, in particular to a constant-power automatic speed regulation control system and method for UHPC stirring, the operation process of a UHPC stirring machine is divided into a plurality of process stages, each stage corresponds to different frequencies, rotating speeds and operation time, accurate control over the rotating speeds is achieved, and on the premise that the power is constant, the speed regulation speed of the UHPC stirring machine can be accurately controlled. The rotating speed is flexibly adjusted to meet the requirements of different stirring stages of UHPC, the mixing quality is guaranteed, efficient utilization of energy is achieved, a constant-speed stirring machine is changed into a variable-speed intelligent stirring machine through multi-section speed control of the frequency converter, energy is saved by 30% or above, and the quality and productivity of UHPC products are remarkably improved through process-level rotating speed matching.

The invention provides a performance prediction method and device based on a refrigerating machine, electronic equipment and a storage medium, and relates to the technical field of refrigeration, and the method comprises the steps that the condensation saturation temperature, the evaporation saturation temperature and the compression exhaust temperature of a refrigerating system are collected in the running test operation process, so that the saturated liquid phase enthalpy and the saturated gas phase enthalpy are determined; according to the condensation saturation pressure calculated according to the condensation saturation temperature and the compression exhaust temperature, the overheat gas specific enthalpy is determined, system refrigeration energy efficiency prediction is conducted according to the saturated liquid specific enthalpy, the saturated gas specific enthalpy and the overheat gas specific enthalpy, and the target system refrigeration energy efficiency is obtained; and performing unit performance prediction on the target refrigerator by using the target refrigeration performance model, the target system refrigeration energy efficiency, the frequency converter efficiency, the motor efficiency and the bearing transmission efficiency. According to the method, the actual refrigerating performance calculation of the refrigerating machine unit from the refrigerating cycle theory can be realized, the problem of performance prediction deviation of the refrigerating machine is effectively solved, and the performance prediction effect of the refrigerating machine is improved.

The invention relates to the technical field of non-variable-capacity pump set parallel control, and discloses a multi-blower parallel air volume control method, which comprises the following steps of: acquiring the real-time rotating speed and the real-time input power of a driving frequency converter of each single blower in a parallel system, and superposing a periodic rotating speed perturbation signal at a common pressure given value to obtain a multi-blower parallel air volume control result; power response amplitudes of all single blowers are extracted synchronously, the change rate of real-time power relative to the rotating speed is calculated to generate a power response gradient representing the energy conversion characteristic of the unit, the unbalanced blowers are recognized according to deviation parameters of the power response gradient relative to the global average value, the rotating speed instruction gain of the blowers is reduced, and the unit energy conversion characteristic is obtained. According to the method, load distribution is converted into an active adjustment mechanism based on the physical characteristics of the impeller, accurate identification of the offset of the physical operation sites of the parallel unit is achieved, and the accuracy of the offset of the physical operation sites of the parallel unit is improved on the premise that branch flow sensing hardware is not needed. And the recessive surge risk caused by single-machine performance discretization is inhibited.

The utility model provides a function module and a frequency converter with the same. The function module is a rectification module or an inversion module. The functional module comprises a heat dissipation piece, a first heat dissipation piece and a second heat dissipation piece, wherein the heat dissipation piece is provided with a first fixing surface and a second fixing surface which are oppositely arranged; the side plate assembly is arranged around the periphery of the heat dissipation piece, and the two ends of the side plate assembly protrude out of the first fixing face and the second fixing face respectively so as to define a first mounting cavity and a second mounting cavity respectively; the plurality of power devices are respectively arranged in the first mounting cavity and the second mounting cavity; and the busbar is connected with the plurality of power devices, and the connecting part of the busbar extends out of the side plate assembly. According to the technical scheme provided by the utility model, the technical problem that the occupied volume of the functional module in the prior art is relatively large can be solved.

The invention relates to a vehicle-mounted screw air compressor oil emulsification prevention method and system, a medium and a program product, and in the method, the running state parameters of a screw air compressor are monitored in real time, and a water vapor saturation pressure formula and a temperature and pressure coupling mathematical model are used for calculating saturation water vapor pressure and actual water vapor partial pressure respectively. When the actual water vapor partial pressure is larger than the saturated water vapor pressure force corrected by the safety coefficient, the system adjusts the oil way temperature control valve to reduce the lubricating oil flow of the oil cooler so as to increase the exhaust temperature. If the condensation risk still exists and the exhaust temperature does not reach the shutdown protection threshold value, the oil way temperature control valve continues to be adjusted; if the exhaust temperature reaches the shutdown protection threshold value, the actual water vapor partial pressure is reduced by reducing the rotating speed of the frequency converter. And after the condensation risk is eliminated, the current operation parameters are maintained. The method is used for reducing the possibility that water vapor reaches saturation in the compression system and liquid water is separated out, and the accuracy and stability of lubricating oil emulsification risk control of the air compressor under the variable load working condition are improved.

The invention relates to the technical field of liquid cooling electric control temperature adjustment, and discloses an air temperature adjustment system for a liquid cooling electric control room based on multi-mode switching. The system comprises a multi-source thermal state monitoring unit, a dynamic thermal coupling evaluation unit, a cooling requirement grading unit and a multi-mode decision-making unit. The multi-source thermal state monitoring unit collects the temperature of a liquid cooling loop of a frequency converter and a fracturing rectifier, the environment temperature of an electric control room and equipment operation power data in real time. The dynamic thermal coupling evaluation unit constructs a nonlinear heat conduction model based on the collected data, and evaluates the dynamic thermal coupling effect between the two devices; the cooling demand grading unit calculates the cooling demand grades of the two devices in combination with the thermal coupling evaluation result and a preset thermal load threshold value; and the multi-mode decision-making unit generates a combined forced cooling, combined natural cooling or mixed cooling mode decision through a ternary state judgment mechanism. The system can flexibly switch cooling modes, is adaptive to different thermal load states of equipment, and gives consideration to both the cooling effect and the energy efficiency.

The invention discloses a PLC controller parameter self-healing system and method based on digital twinning, and the system comprises a digital twinning construction module which is used for carrying out the multi-source data fusion and constructing a virtual model which is synchronous with a control entity on a production line through a dynamic mapping mechanism, the control entity at least comprises a servo driver, a frequency converter and a motor connected with the frequency converter; the self-healing engine module is connected with the digital twin construction module and is used for performing fault prediction, root cause analysis and parameter compensation generation based on the virtual model; a security implantation module; the control parameter iterative optimization module is connected with the self-healing engine module and the physical PLC controller and is used for constructing a double-loop feedback mechanism to continuously optimize servo gain, a frequency converter frequency instruction and a prediction model; according to the system, a complete closed loop from state sensing, fault prediction, intelligent decision making to safe execution can be realized, and the intelligent level and the operation reliability of a production line are remarkably improved.

The invention relates to an electric furnace steelmaking buggy ladle control system, and belongs to the technical field of electric furnace steelmaking equipment. According to the technical scheme, a hardware control module (1) takes a frequency converter as a core driving unit, is provided with a variable frequency motor (10), a motor band-type brake device (11) and an encoder, is integrated with a weighing sensor (14) and a laser ranging device (16), and is further provided with a sound-light alarm device (12), and the weighing sensor (14) and the sound-light alarm device (12) form a linkage safety control loop; the software control module is provided with a plurality of operation terminals, and the multiple operation terminals are of a distributed control architecture. The method has the beneficial effects that the control accuracy is high, and the positioning precision is improved; a linkage alarm mechanism can prevent overload, abnormal vibration and brake failure risks, and the safety performance is enhanced; the multi-station cooperation requirement can be met; the variable-frequency speed regulation and torque compensation technology reduces energy consumption, meets the requirement for heavy-load stable starting, and is energy-saving and efficient.

The invention provides a data room intelligent liquid cooling system, which comprises a liquid cooling cabinet, a water chilling unit and an electric control cabinet, and is characterized in that the liquid cooling cabinet comprises a server position slot and a heat exchanger, the server position slot stores insulation cooling liquid, the heat exchanger is communicated with the server position slot through a cooling liquid circulation pipeline, and the circulation pipeline is provided with a cooling liquid circulation pump; the water chilling unit comprises a refrigerator, a water tank and a cold water circulating pump, the refrigerator communicates with the heat exchanger through a cold water circulating pipeline, and the cold water circulating pump is arranged on the cold water circulating pipeline; the electric control cabinet comprises a data acquisition device, a control device and a frequency converter, and the control device is electrically connected with the cooling liquid circulating pump through the frequency converter and used for controlling the working frequency of the cooling liquid circulating pump according to data acquired by the data acquisition device. According to the intelligent liquid cooling system for the data machine room, the temperature of the cooling liquid can be accurately controlled, rapid cooling and accurate heat dissipation are achieved, and meanwhile energy consumption is reduced.

The invention discloses a multi-mode fusion power semiconductor module full-automatic detection system and method, relates to the technical field of semiconductor testing, constructs a multi-topology loading module, and realizes mechanical load testing under a frequency converter working condition, electrical load simulation under a grid-connected working condition and static electrical parameter testing. And covering dynamic and static performance detection of the module in a multi-application environment. A multi-source temperature monitoring and weighted fusion technology is introduced, and precise regulation and control of local junction temperature, surface temperature and radiator temperature of the module are realized. Dynamic switch characteristics are extracted from various collected data through wavelet transformation, and module failure probability prediction is completed in combination with a Weibull life model. Automation of whole-process data analysis and detection report generation is achieved, and the test efficiency and the evaluation intelligent level are improved. The method is suitable for multi-scene performance evaluation and reliability analysis of the power semiconductor module.

The invention provides a flywheel energy storage system with an electromagnetic coupler, which comprises a motor, a flywheel rotor, the electromagnetic coupler, a frequency converter and a generator, and is characterized in that the motor is connected with the flywheel rotor to drive the flywheel rotor to rotate, the electromagnetic coupler comprises an outer rotor and an inner rotor, and the outer rotor sleeves the inner rotor and is spaced from the inner rotor; the flywheel rotor is in transmission connection with the inner rotor, the inner rotor generates a rotating magnetic field to drive the outer rotor to rotate, and the frequency converter is connected with the outer rotor to change the current frequency of the outer rotor so as to change the magnetic field rotating speed matched with the current, so that the mechanical rotating speed of the outer rotor is kept constant. The generator generates power, accesses the power grid and inputs electric energy with stable frequency into the power grid, the requirement of power transmission to the power grid is met, power electronic devices are not needed, rotational inertia in the power grid can be improved, necessary voltage and frequency support is provided for the power grid, and the capacity of the power grid for efficiently accepting new energy is improved.

The utility model relates to the technical field of magnetic suspension fans, in particular to a circulating cooling magnetic suspension air compressor, which comprises a compressor body arranged in a case, a water cooling tank arranged at the bottom of the compressor body, a water inlet pipe and a water outlet pipe arranged on the water cooling tank and connected between the inside of the water cooling tank and the outside, and a cold water pipe arranged at the output end of the water tank. The water cooling box is arranged to cool compressed air, the situation that the temperature of the compressed air is too high, and consequently normal use of the subsequent compressed air is affected is avoided, the water cooling box is provided with a water inlet pipe and a water outlet pipe which are connected between the interior of the water cooling box and the outside, and the water cooling box is provided with a water inlet pipe and a water outlet pipe which are connected with the water cooling box. The water cooling box is always kept in a constant-temperature state, the cooling effect of the water cooling box on compressed air is improved, a circulation pipeline is formed through the cold water pipe and the water return pipe, cooling treatment on the compression motor and the frequency converter is achieved, and therefore the situation that the temperature of the compression motor and the frequency converter is too high is avoided.