488 results about "Variable frequency control" patented technology

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 relates to a current control method for a continuous casting blank stirrer, and the method comprises the steps: setting control parameters of a variable-frequency controller in an electromagnetic stirrer, enabling an actual current to rise to a target current value, controlling the current to be increased to a current oscillation upper limit value at a certain rate, and then enabling the current to be reduced to a current oscillation lower limit value at a certain rate, and the circulation is repeated, so that the continuous casting electromagnetic stirring current is changed in a periodic sinusoidal waveform. The electromagnetic stirring current is controlled to change in a periodic sinusoidal waveform, so that the carbon segregation of the casting blank is improved, the carbon segregation range of the casting blank is reduced, the internal components of the casting blank are more uniform, and the performance of the casting blank is improved.

The application provides a transient frequency conversion control method of a converter and an electronic device. The method comprises the following steps: determining the working state of the converter, wherein the working state comprises a light load working state and a heavy load working state; if it is determined that the working state switches between the light load working state and the heavy load working state, starting a transient frequency conversion control strategy to adjust the switching frequency of the converter, wherein the transient frequency conversion control strategy is used to adjust the duration of the freewheeling stage in the switching cycle of the converter; after the working state of the converter switches, and the clamping capacitor voltage sampling value of the converter v c satisfies a preset condition, exiting the transient frequency conversion control strategy to restore the switching frequency of the converter to normal. The dynamic response speed of the converter is effectively improved, and the overshoot and drop of the output voltage when the converter is subjected to a step load are reduced.

The invention provides a method for improving transient stability of a submarine direct-current power supply system based on frequency compensation. The method comprises the following steps: acquiring a real-time electrical parameter detection item of a first system; based on the first system real-time electrical parameter detection item, judging whether the system load power is within a power range required by a transient stable operation condition; if not, the switching frequency compensation amount of the input-series output-parallel resonant converter sub-module is calculated; based on the switching frequency compensation amount, determining a switching signal of a sub-module switching tube of the input-series output-parallel resonant converter; acquiring a real-time electrical parameter detection item of a second system; based on a second system real-time electrical parameter detection item, judging whether the system load power is within a power range required by a transient stable operation condition; if yes, conventional frequency conversion control is adopted. The technical blank in the field is effectively filled, and the stability of the submarine direct-current power supply system in the transient process is remarkably improved.

This invention provides a random frequency conversion control method for NVH (Noise, Vibration, and Harshness) of a motor controller in a pure electric vehicle. The method includes: simulating the full throttle pedal condition of the entire vehicle on an electric drive test bench to eliminate tire noise and wind noise interference, thereby obtaining a spectrum diagram of the NVH of the electric drive system at the IGBT base frequency under the full throttle pedal condition; analyzing the spectrum diagram to identify the prominent NVH noise range under the full throttle pedal condition, and using this prominent NVH noise range as the entry condition for random frequency conversion; establishing corresponding random frequency conversion models for different prominent NVH noise ranges based on the base frequency of the IGBT switching frequency, to perform random frequency conversion control on the prominent NVH noise ranges, and using the base frequency of the IGBT switching frequency for control in the non-prominent noise ranges. This invention can reduce the switching frequency noise of the motor controller and improve the NVH performance and safety of electric vehicles.

The invention relates to the technical field of heat pump drying, and discloses a frequency conversion control drying method and a frequency conversion water source high-temperature drying heat pump unit which comprises a mounting bottom plate, a compressor arranged at the upper end of the mounting bottom plate and an air inlet pipe arranged at the upper end of the compressor. The dredging unit is arranged on the air inlet pipe and comprises an expansion part and an air inlet cleaning part which are arranged in the air inlet pipe; by arranging the dredging unit, when the compressor provides high-temperature gas to dry a metal material, once a filter screen in the compressor is blocked, the cleaning air inlet component can be automatically triggered through the expansion component, so that the cleaning air inlet component cleans the blocked filter screen, and normal air inlet and air outlet of the compressor are ensured; and continuous supply of hot air is ensured, the drying efficiency of the metal materials is improved, workers do not need to clean the filter screen regularly, and the labor cost and the maintenance difficulty are effectively reduced.

The embodiment of the invention provides an ultrasonic knife control method and device, medical equipment and a storage medium, an ultrasonic knife comprises a first piezoelectric vibration assembly and a second piezoelectric vibration assembly, the first piezoelectric vibration assembly is used for generating ultrasonic waves based on a resonance mode, the second piezoelectric vibration assembly is used for collecting the output frequency of the ultrasonic waves, and the output frequency of the ultrasonic waves is converted into the output frequency of the ultrasonic waves. The ultrasonic knife control method comprises the steps that when a frequency conversion control instruction is received, the jump frequency of the frequency conversion control instruction is determined; obtaining the output frequency; determining a target frequency in combination with the hopping frequency and the output frequency; and controlling the first piezoelectric vibration assembly based on the target frequency and the output frequency. The target frequency is determined through the hopping frequency based on the frequency conversion control instruction, frequency hopping control is conducted on the first piezoelectric vibration assembly, the characteristics of different vibration waves are output, and the using effect of the ultrasonic knife is improved.

The application discloses a traction transformer control cabinet and a rail train, and relates to the technical field of rail transit vehicles.The traction transformer control cabinet comprises a detachable shell and a control module arranged in the detachable shell; wherein the control module is used for determining the fan frequency of the fan in the cooling system of the traction transformer according to the first collection data sent by the whole vehicle controller of the rail train and the second collection data sent by the traction transformer, so as to utilize the fan frequency to perform frequency conversion control on the fan; the first collection signal comprises vehicle speed data, and the second collection signal comprises oil temperature data; through the arrangement of the traction transformer control cabinet, the control module in the traction transformer control cabinet performs frequency conversion control on the cooling fan according to the data such as the vehicle speed of the train and the oil temperature of the traction transformer, the low noise and the intelligentization of the traction transformer are realized, the noise of the rail train can be effectively reduced, and the passenger comfort is improved.

The invention relates to the technical field of centrifugal machines, in particular to a variable-frequency energy-saving automatic control system of a centrifugal machine, which comprises a centrifugal module used for separating materials according to the centrifugal machine to obtain a target product and comprising a driving motor used for providing centrifugal power; the data processing module comprises a data acquisition unit used for acquiring operation data of the centrifugal machine; the frequency conversion self-control module comprises a main MCU (Microprogrammed Control Unit) for outputting an adjusting strategy of the centrifugal machine according to a neural network model; the counting adjusting module is used for determining the counting frequency of the timer in the slave MCU according to the start-stop response duration of the driving motor; the feed-forward adjusting module is used for determining the feed-forward lead of the auxiliary motor according to the phase deviation value of the PWM signal; and the cache adjustment module is used for determining an operation data cache trigger threshold according to the slave MCU instruction response deviation duration. The real-time performance of frequency conversion self-control of the centrifugal machine is improved.

The invention discloses a deep-well pump operation frequency conversion control method and system, and particularly relates to the technical field of liquid level automatic control. Based on the water level and the water level change rate, operation modes are intelligently judged and switched, and a dynamic water supply mode and a static maintenance mode are included; intelligent wakeup and protection are realized in a static maintenance mode; according to the sleep frequency self-learning algorithm, the sleep frequency and the wake-up water level are updated according to the real-time working condition; and multi-stage protection logic is integrated in the whole process. According to the invention, through the improved variable parameter PID control, the static maintenance and intelligent wake-up mechanism and the online self-learning ability, the system adjustment precision, the energy-saving effect and the adaptive ability are improved, and meanwhile, the reliability and safety of the system are enhanced through the multi-level protection logic.

The invention relates to the technical field of water pump operation monitoring, control and fault processing, in particular to a water pump operation monitoring and automatic control system which comprises a multi-parameter monitoring module, a data processing and transmission module, an intelligent decision control module, a self-adjusting module and a fault diagnosis early warning module. The P factor can be adjusted in time through instantaneous correction of the change rate of the pressure deviation of the water outlet end, and quick response and stable control of the pressure are achieved; and secondly, in the execution aspect, broadband adjustment of a frequency conversion controller of 5-50 Hz is adopted, fine adjustment is preferentially adopted when the pressure deviation of an electric adjusting valve is smaller than 0.05 MPa, and reasonable application of coarse adjustment and fine adjustment is achieved in cooperation with the large-range working condition of field actual operation and the small-range parameter difference.

1. The name of this design product: Low-voltage motor controller (EV200). 2. Purpose of this design product: frequency conversion controller used to control low-voltage motors. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention provides a high-power rectification resonance control method and system for a quick charger, relates to the technical field of rectification resonance, and aims to obtain direct-current bus voltage, adjust output power through frequency modulation of a full-bridge LLC resonant converter, and perform voltage stability control adjustment in combination with feedback current data. Charging curve data analysis is carried out to acquire charging key nodes and resonance frequency nodes, device state data acquisition and analysis are carried out, a frequency conversion control loop is constructed, resonance frequency adjustment is carried out, after adjustment is completed, abnormal nodes are identified and combined analysis is carried out, optimal parameters of each load segment are acquired, and voltage fluctuation data are acquired. The method comprises the steps of carrying out fluctuation influence analysis, carrying out fluctuation suppression by adjusting a switching frequency and phase shift angle combination of a full-bridge LLC resonant converter, carrying out calculation through the full-bridge LLC resonant converter to obtain an equivalent voltage control instruction, carrying out mode buffer switching and obtaining mode control switching data, and realizing rectification resonance accurate control of the charger.

The invention discloses a hydrogen production alkali liquor circulation system adapting to wind and light fluctuation and a control method of the hydrogen production alkali liquor circulation system, and solves the problems that in the prior art, an alkali liquor circulation path of an alkali liquor circulation system is fixed, the adjusting capacity is limited, and a dynamic buffering and quick response mechanism is lacked. The separator is connected with an alkali liquor circulating pump, the alkali liquor circulating pump is connected with an inlet of the electrolytic cell, the alkali liquor circulating pump is connected with an alkali liquor circulating buffer tank, an automatic regulating valve is arranged between the alkali liquor circulating pump and the alkali liquor circulating buffer tank, and a flowmeter A is arranged between the separator and the alkali liquor circulating pump. A flow meter B is arranged between the alkali liquor circulating pump and the electrolytic bath, the alkali liquor circulating pump is connected with a frequency conversion control system, and the frequency conversion control system adjusts the operation frequency of the alkali liquor circulating pump according to a current signal of the electrolytic bath. The alkali liquor circulation flow is adjusted through current signal adjustment and a frequency conversion control strategy, and the response speed and stability of the system are improved.

The invention relates to the technical field of gas compressor control, in particular to a gas compressor working condition self-adaption frequency conversion control method which comprises the steps that 1, multi-dimensional operation parameters are collected and preprocessed in real time; 2, real-time surge margin calculation and safety boundary dynamic construction are carried out, the real-time pressure ratio and the equivalent correction flow are calculated according to the real-time operation parameters preprocessed in the step 1, a preset compressor characteristic map is inquired, and the real-time surge margin is calculated; step 3, adaptive efficiency optimization and rotating speed decision making based on model prediction; and step 4, smooth issuing and closed-loop monitoring of a frequency conversion instruction: the optimal frequency set value obtained in the step 3 is processed through a smoothing algorithm and then is issued to the frequency converter, and closed-loop monitoring and emergency protection logic processing are carried out in the frequency adjustment process. Through a smooth instruction and closed-loop monitoring, oscillation and unnecessary energy consumption possibly caused in the control process are reduced.

The invention provides an intelligent variable-frequency dust fall system for a construction site. A flying dust monitoring module is used for monitoring dust particulate matter information of the construction site; the dust falling module is used for carrying out dust falling operation on the construction site; the water supply module is used for collecting treated water so as to supply water to the dust falling module during the dust falling operation; the frequency conversion control module is used for controlling respective working states of the dust falling module and the water supply module according to the dust particulate matter information, and dynamically regulating and controlling operation of dust falling equipment by detecting the dust particulate matter information of flying dust in real time, so that accurate and efficient flying dust treatment is realized, the utilization efficiency of water resources and energy can be optimized, and the dust falling equipment can be flexibly suitable for various construction environments; the flying dust treatment effect and the resource saving capacity are remarkably improved, and the problem of air pollution caused by flying dust on the construction site is effectively solved.

The invention discloses an electrosurgical radio frequency inverter based on model predictive control and a frequency conversion control method thereof, and the method comprises the steps: building a discrete output voltage prediction model based on a topological structure of the electrosurgical radio frequency inverter, and judging a switching frequency switching point and voltage peak output power through single sampling period iterative calculation. Constructing an output power prediction model; obtaining instantaneous prediction output power and theoretical reference output power obtained by real-time sampling and calculation when the output voltage is changed to a periodic peak value, and constructing a model prediction control evaluation function; according to the evaluation function, real-time voltage sampling and multi-frequency iteration prediction are combined with a set control target, the switching frequency of the radio frequency inverter is predicted and updated in real time, and constant-power frequency conversion control over the radio frequency inverter is achieved by continuously obtaining the control quantity at the next moment. The system can adapt to constant power output of a power supply under biological impedance change, can predict and control constant power output of an electrosurgical inverter in real time based on real-time updating of switching frequency, has good dynamic response performance, guarantees high efficiency and safety of clinical operations, and can be applied to various electrosurgical working platforms.

The invention discloses a centrifugal CO2 compressor unit frequency conversion-surge prevention cooperative control system and method based on fuzzy PID. The centrifugal CO2 compressor unit frequency conversion-surge prevention cooperative control system comprises an inlet mother pipe, an outlet mother pipe, a compressor C, a frequency converter VFD, a measuring unit, a frequency conversion control unit SICU, an anti-surge valve control unit ASVCU, an anti-surge protection control unit ASCU, an anti-surge bypass and an anti-surge valve ASV. The action weights of the frequency conversion valve and the anti-surge valve are dynamically distributed through the fuzzy rule, surge can be avoided, backflow loss can be reduced, the problem of mutual coupling of the two control systems can be solved, and the inlet pressure of the compressor unit is stabilized near a set value on the premise that the safety of the unit is guaranteed.

The invention provides a pump pressure control optimization method for controlling the water level of a pump room, which belongs to the field of PID control and specifically comprises the following steps: S1, sensing the current water level of the pump room in real time; s2, calculating a historical water level mean value, determining a pump room reference water level, and constructing a current adjustment error; s3, the pump pressure adjusting amount is calculated through an incremental pump pressure PID controller, and a current control signal is finally determined in combination with control output at the previous sampling moment; s4, performing online optimization on parameters of the incremental pumping pressure PID controller by adopting an improved bank interconnection system algorithm; the method specifically comprises the following steps: S41, constructing a self-adjusting offset coupling amplitude based on a distribution tensor and a diffusion adaptive coupling amount; s42, constructing an evolution co-integration criterion quantity based on the co-motion configuration tensor; s5, the control signal is output to a pump set frequency conversion control module, and a water pump is driven to adjust the output pressure; according to the method, high-precision regulation and control of the water level of the pump room are achieved through precise regulation of the pump pressure.

The invention provides an intelligent warehousing system, a stacking machine and a control method of the stacking machine, and relates to the technical field of intelligent warehousing. The stacking machine is suitable for moving goods among the multiple goods grids; the stacker adopts frequency conversion control; the control method comprises the steps of obtaining an operation instruction and analyzing a target position; planning a motion path according to the current position and the target position of the stacker; wherein the path planning is based on a three-axis coupling dynamic model, the shortest total operation time is taken as a target function, and the dynamic parameter difference of each axis is comprehensively considered to optimize the speed curve matching relationship of each axis; generating a smooth speed curve for each motion axis according to the motion path, wherein the speed curve adopts a segmented continuous S-shaped acceleration and deceleration model; wherein if yes, it is judged that the stroke is a long stroke, and a standard seven-section S-shaped speed curve is adopted; if not, the stroke is short, and five or three sections of simplified S-shaped curves are adopted; and the stacking machine is moved to the target position according to the movement path and the speed curve.

The invention discloses an embedded frequency conversion control method and system for motor control, and relates to the technical field of motor control, and the method comprises the steps: laying an embedded frequency conversion control network for a target irrigation area, and the embedded frequency conversion control network comprises a data sensing module, an embedded micro-control module and a power driving module; based on the data sensing module, real-time soil humidity, real-time environment data and meteorological data are obtained and transmitted to the micro-control module; and the micro-control module performs multi-stage frequency conversion control analysis, generates a dynamic motor control instruction, sends the dynamic motor control instruction to the power driving module, and executes self-adaptive frequency conversion control. The technical problems that an existing irrigation system is insufficient in motor control accuracy, high in energy consumption and capable of affecting the irrigation energy efficiency are solved, and the technical effects that through embedded frequency conversion control, the dynamic adjustment of the motor operation frequency is achieved, the motor control accuracy is improved, the energy consumption is reduced, and then the irrigation energy efficiency is optimized are achieved.

The invention relates to the technical field of data processing, and discloses a cooling device energy-saving control method and system based on remote analysis. The method comprises the following steps: installing a sensor to obtain and pre-process operating parameters to obtain system state data; load prediction is carried out in combination with historical records; optimizing water pump parameters based on the predicted value, and generating frequency conversion control parameters; establishing a temperature difference control standard to obtain a differential target value; calculating a water pump cooperative operation scheme to form a group control instruction; parameters are evaluated and adjusted in real time, and an energy-saving control strategy is optimized. The technical problems that an existing cooling device control method lacks the load prediction capacity based on historical data analysis, a differential temperature difference control strategy and a multi-water-pump collaborative optimization mechanism are solved, efficient and energy-saving operation of the cooling device is achieved by establishing an intelligent control system based on remote analysis, and energy consumption is remarkably reduced.

The application relates to the technical field of data processing, and discloses a cooling device energy-saving control method and system based on remote analysis. The method comprises the following steps: installing a sensor to obtain operation parameters and preprocessing to obtain system state data; load prediction is performed in combination with historical records; water pump parameters are optimized based on the predicted value to generate variable frequency control parameters; a temperature difference control standard is established to obtain differentiated target values; a water pump cooperative operation scheme is calculated to form group control instructions; and real-time evaluation and adjustment parameters are calculated to optimize the energy-saving control strategy. The application solves the technical problems of lacking load prediction capability based on historical data analysis, lacking differentiated temperature difference control strategies and lacking a multi-water pump cooperative optimization mechanism in the existing cooling device control method. Through the establishment of an intelligent control system based on remote analysis, efficient and energy-saving operation of the cooling device is realized, and energy consumption is significantly reduced.

The invention belongs to the technical field of underwater construction and protection engineering, and discloses a grouting construction and flushing visual simulation system and method for underwater protection engineering, and the system comprises a circulating water flow part which comprises a water pump, a circulating water tank and a visual simulation water tank which are sequentially connected end to end through a water pipe; the centralized control part comprises a data control unit, a variable frequency controller for controlling the rotation of the water pump, a regulating valve, a flow meter, a grouting assembly and an underwater camera device which are electrically connected; the deformable base module comprises a plurality of electric telescopic supports distributed on the periphery of the basic model body and a flexible rubber film covering all the electric telescopic supports in a sealed mode. The system adopts an electric control closed-loop adjusting structure, can control the pump speed and the valve opening degree, realizes that the flow velocity fluctuation precision is controlled within + / -1%, and can simulate various dynamic flow fields; the deformable scouring foundation module can generate different bottom bed conditions according to test requirements, and the working condition reproduction capacity and adaptability of the system are greatly improved.

The utility model discloses an energy-saving main exhaust fan adopting frequency conversion control, which belongs to the technical field of centrifugal fans, and comprises a base, a mounting mechanism is arranged at the top end of the base, an adjusting mechanism is arranged outside the mounting mechanism, a mounting rack is fixedly mounted at the top end of the base, and the adjusting mechanism is arranged outside the mounting mechanism. A variable frequency motor is fixedly mounted at the top end of the mounting rack, an output shaft of the variable frequency motor is fixedly connected with a fan shaft blade through a coupler, and a fixing mechanism is arranged in the mounting rack. By arranging the mounting mechanism and the adjusting mechanism, the angle of the air outlet pipe of the carbon steel shell can be adjusted, so that the air outlet direction can be flexibly changed according to actual requirements to adapt to different mounting environments and ventilation requirements, the flexibility and adaptability of the centrifugal fan can be remarkably improved, and the service life of the centrifugal fan is prolonged. And the requirements of various application scenes can be better met, so that the practicability and the market competitiveness of the equipment are improved.

A same-frequency blowing system and working method belong to the technical field of square tube cutting. The system blows the square tube head and tail simultaneously while cutting, and the blowing device is linked with the cutting power supply, effectively saving energy. The system ensures that the tail blowing mechanism does not collide with the running square tube. When the square tube advances, the floating roller rotates around the rotating bearing after being pushed by the square tube, and turns to the lower side of the square tube. When the square tube is taken away, the floating roller reverses and rotates around the rotating bearing under the gravity of the weight. According to the dust collection mode of steel plate plasma cutting operation, the dust collector adopts frequency conversion control, blowing is added on one side of the smoke suction port, the smoke dust collection effect is improved, the electric energy is saved, the blowing distance is closer, the control is more sensitive, the effect is better, the smoke dust diffusion problem can be effectively solved, the environmental pollution is reduced, and the normal use of the equipment is ensured.

The invention relates to an intelligent multi-protection frequency conversion control method and system for a compressor, and the method comprises the steps: receiving a resistance value of an external resistor, setting an under-voltage protection voltage point and an overvoltage protection voltage point of the system according to the resistance value, receiving a resistance value signal of an external speed regulation resistor, and setting the under-voltage protection voltage point and the overvoltage protection voltage point according to the resistance value; the method comprises the following steps: determining a target rotating speed according to a pre-stored resistance-rotating speed mapping relation, further generating a corresponding PWM control signal to drive a compressor, monitoring voltage, current, temperature and motor phase state parameters of a system in real time, triggering a fault signal when any fault of overvoltage, undervoltage, overcurrent, phase loss or over-temperature is identified, and outputting the fault signal. According to the specific fault type identified in the fault diagnosis step, an indicator light is controlled to output a fault code of a corresponding specific flicker sequence, the internal temperature of the frequency converter is monitored, a cooling fan is started when the temperature exceeds a fan starting threshold value, and the cooling fan is closed when the temperature is lower than a fan stopping threshold value.

The present application relates to a kind of textile gas setting machine of configuration oxygen-rich control wet energy-saving system, the oxygen-rich control wet energy-saving system, including: oxygen-rich oxygen generator, with the one-to-one correspondence setting of gas burner on the textile gas setting machine, for generating oxygen-enriched air;Three-way bypass and bypass valve, with the one-to-one correspondence setting of gas burner, one end is communicated the oxygen-enriched air outlet of oxygen-rich oxygen generator, the other end is communicated the pipeline between corresponding gas burner and gas access solenoid valve on textile gas setting machine;High-temperature humidity sensor, with the one-to-one correspondence setting of each air draft section of the air draft branch pipe on the textile gas setting machine, for obtaining the exhaust gas discharge humidity parameter of setting machine section;Variable frequency control induced draft fan, replace the induced draft fan corresponding to the air draft branch pipe;Controller, with the variable frequency control induced draft fan, high-temperature humidity sensor connection;With the starting switch of connected gas burner, the oxygen-rich machine vacuum pump frequency converter circuit connection.

The application is a control method of a wide voltage range CLLL resonant converter for an energy storage system, which comprises the control of the energy storage system in three different stages of constant current charging, constant voltage charging and constant current discharging s The bridge phase shift angle is used to realize wide voltage gain control, and the switching frequency f s is adjusted to be equal to the resonant frequency f r to realize constant voltage gain control, and the switching frequency f s is adjusted to realize wide voltage gain control. In the control of the three different stages, all the switching devices of the CLLL resonant converter can realize soft switching operation. Compared with the frequency control, the switching frequency of the converter in the control method does not exceed the resonant frequency, the switching frequency is lower, the variation range of the switching frequency is narrower, which is beneficial to the design of the transformer and the driving circuit, and the converter has a wider voltage adjustment range in the step-down mode.

The application discloses a kind of water pump AC frequency converter energy-saving optimization control system, it is related to water pump energy-saving control technical field;Including: database, identification perception module, operation optimization module and control feedback module.Database acquires water pump operating parameter, and based on this and calculates lift, water pump efficiency and load rate;Identification perception module is based on lift, water pump efficiency and load rate deviation analysis constructs fusion deviation curve, and based on this obtains judging index to analyze curve area, to identify inefficient operation scene;Operation optimization module determines target flow, target lift according to end water demand and pipe network pressure demand, and obtains target frequency in combination with water pump similarity law and efficiency, lift deviation correction;Control feedback module implements frequency conversion control according to target operating parameter, and real-time feedback and secondary correction are carried out to execution result, form closed-loop optimization control, improve energy efficiency identification ability under low load condition, reduce water pump operating energy consumption.