627 results about "Motor efficiency" patented technology

The invention discloses an asynchronous motor energy-saving monitoring and dynamic early warning method based on situation awareness, and relates to the technical field of asynchronous motor energy-saving monitoring. The method comprises the steps that S1, multi-source heterogeneous data are synchronously collected, power supply parameters and operation parameters are obtained in real time, and a frequency conversion working condition self-adaptive deviation value and a current stability coefficient are obtained; s2, generating four-dimensional situation factors including an overtemperature danger value, a current stability coefficient, a voltage stability coefficient and a frequency deviation value; s3, constructing a fourth-order transmission network, and generating a primary early warning signal based on the path mark combination; s4, calculating the motor efficiency in real time, triggering an efficiency abnormity mark, fusing the efficiency abnormity mark with the primary early warning signal, and reconstructing a final early warning instruction; and S5, executing hierarchical control according to the final early warning instruction. Through multi-parameter coupling and dynamic early warning transmission, the early-stage capture capability of the composite fault is improved, the early warning response delay is shortened, energy-saving optimization and fault protection of the motor are realized, and the method has a remarkable practical value.

The invention provides a method and system for predicting the remaining endurance mileage of an electric vehicle, and belongs to the technical field of new energy vehicles. The prediction method comprises the following steps: acquiring time sequence data of a driving habit of the electric vehicle; driving habit features are extracted according to the time sequence data of the driving habits, and driving habit feature vectors are obtained; constructing a driving habit model according to the driving habit feature vector; integrating data acquisition, cleaning and calibration to obtain calibration data; calculating basic driving energy consumption, auxiliary system energy consumption, battery management system energy consumption and motor efficiency loss according to the calibration data, and constructing an energy consumption model; and calculating an initial endurance mileage according to the battery remaining capacity, sequentially correcting based on the driving habit correction coefficient, the battery capacity loss coefficient and the road condition correction coefficient, and predicting the remaining endurance mileage. The method solves the problem of mileage false report and the like caused by the fact that an existing electric vehicle endurance mileage prediction model is difficult to accurately consider the influences of vehicle parameters, battery performance, environmental factors and the like.

The invention discloses a range extender power generation system and a control method, and relates to the technical field of power systems. The system comprises an energy storage module, a driving module, a range extender module and a control module, the control module combines model predictive control and reinforcement learning and optimizes energy distribution, so that the system can automatically select an optimal strategy according to different driving working conditions, the energy utilization efficiency is further improved, the total energy consumption is reduced, and the driving efficiency is improved. The efficient cooperative work of the internal combustion engine, the generator and the driving motor is realized; self-adaptive gear shifting control is carried out based on real-time vehicle working conditions, path prediction information and motor efficiency, and it is ensured that a driving motor always works in an efficient area. Besides, the system also has fault diagnosis and fault-tolerant control functions, can detect the performance deviation of the engine and the generator in real time, automatically enters a fault-tolerant mode when a fault occurs, and ensures that the vehicle can safely run to a preset place even under the fault condition by cutting off or adjusting the output of the engine.

The invention relates to an FOC control method based on an automobile air conditioner module motor without a Hall sensor, and belongs to the technical field of automobile electronics. The method comprises the following steps: injecting double-frequency voltage pulses into a stator in stages to position a rotor; collecting current through a sampling resistor and filtering to construct a rotor flux linkage distribution model, and presetting rectangular axis current in combination with noise reduction of a miniature acoustic sensor and air speed gear of an air conditioner; an extended Kalman filter observer is adopted to reversely deduce the load torque, and the torque change rate is monitored to trigger instantaneous load impact protection; the voltage space vector amplitude is corrected through voltage feed-forward compensation, a resistor-capacitor series filter circuit is additionally arranged, and phase dislocation pulse width modulation is adopted for resisting interference; and establishing a motor efficiency-rotating speed-load three-dimensional optimization method, starting dynamic flux-weakening control, and estimating the winding temperature through the stator resistance to adjust the flux-weakening depth. Accurate starting and dynamic load adaptation of the Hall-sensor-free motor are achieved, starting out-of-step and noise exceeding are avoided, and stable air volume of an automobile air conditioner and long-term reliable operation of the motor are guaranteed.

The invention relates to a motor dynamic driving control method, device and system based on motor working conditions. The motor dynamic driving control method based on the motor working condition comprises the following steps: S1, acquiring motor operation data; s2, judging the working condition of the motor according to the operation data of the motor; s3, selecting a corresponding control algorithm according to the working condition of the motor; and S4, through the control algorithm, according to the motor operation data, generating a control signal. The working condition of the motor is actively judged by monitoring the operation data of the motor, then the appropriate control algorithm is adaptively switched according to the current working condition of the motor, and high motor efficiency and good stability can be obtained under any working condition of the motor.

The invention discloses an electric vehicle control optimization method based on big data, and relates to the field of big data, and the method comprises the steps: building a cloud database containing the historical and real-time data of vehicles in the same batch, obtaining multi-source data through a motor, a battery, an environment and an accessory equipment collection terminal, and carrying out the optimization of the multi-source data; and calculating a battery health degree fluctuation coefficient Kb, a motor efficiency fluctuation coefficient Km and an environmental factor fluctuation coefficient Ke after Min-Max normalization processing, and importing a dynamic energy consumption model to generate a real-time energy consumption rationality index Es. And the vehicle control unit VCU dynamically adjusts the air conditioner power, the motor output torque and the battery charging and discharging mode according to the Es, an optimization instruction is sent to the ECU controller, and a historical database is updated. The method breaks through the limitation of traditional fixed parameter control, accurately evaluates the influence of the battery, the motor and the environment, reduces the abnormal fluctuation of energy consumption, improves the energy efficiency management level of the whole life cycle, prolongs the service life of the battery pack, and guarantees the safety and compliance of data.

The invention belongs to the technical field of PCBs, and particularly provides a modularized PCB motor stator winding structure which is used for solving the problems that a traditional PCB spiral winding is low in space utilization rate of a stator, short in effective conductor, too large in end winding, large in copper loss, small in interlinking magnetic flux area, low in motor efficiency and the like. The stator comprises a PCB stator plate and a plurality of winding coils arranged on the PCB stator plate, the PCB stator plate adopts a circular disc type structure, the winding coils adopt wedge-shaped structures, and the plurality of winding coils are circumferentially and uniformly distributed on the PCB stator plate. Through the design of the winding coil of the wedge-shaped structure, the space utilization rate of the stator is effectively improved, the effective conductor length is increased, the magnetic flux distribution between the stator and the rotor is optimized, stronger magnetic field interlinking is brought, and then the no-load back electromotive force amplitude is improved; meanwhile, end loss is effectively reduced, copper loss is reduced, and motor efficiency is improved.

The embodiment of the invention provides a refrigerator performance prediction method and device, electronic equipment and a storage medium, and belongs to the technical field of refrigerators. The method comprises the steps that operation state parameters of a refrigerating machine unit are obtained, the refrigerating machine unit comprises a refrigerant system, the refrigerant system comprises an evaporator, a condenser and a compressor, and the operation state parameters comprise the first saturation temperature and the steam superheat degree of the evaporator, the second saturation temperature and the liquid supercooling degree of the condenser and the exhaust temperature of the compressor; calculating a first energy efficiency coefficient of the refrigerant system according to the first saturation temperature, the steam superheat degree, the second saturation temperature, the liquid supercooling degree and the exhaust temperature; obtaining rolling bearing transmission efficiency and motor efficiency of the refrigerator unit; and calculating a second energy efficiency coefficient of the refrigerator unit according to the rolling bearing transmission efficiency, the motor efficiency and the first energy efficiency coefficient. According to the embodiment, the accuracy of refrigerator performance prediction can be improved.

The invention discloses a motor rotor core and a manufacturing method thereof, and belongs to the technical field of motor design and manufacturing. The rotor iron core comprises an iron core main body formed by laminating a plurality of punching sheets, and self-adhesive sheet end plates and arc-shaped pressing rings which are arranged at the two ends of the iron core main body. The self-adhesive sheet end plate is formed into a whole by heating, pressurizing and curing a self-adhesive sheet coated with epoxy resin or acrylic resin; the arc-shaped pressing ring is provided with a cambered surface structure, so that synchronous pressing in the axial direction and the radial direction can be achieved. And the iron core main body adopts a transposition lamination process, so that burrs of the punching sheet are uniformly distributed. Through chemical bonding of the end plates of the self-adhesive sheets, mechanical wedge-caulking of the arc-shaped pressing rings and error homogenization of transposition lamination, and through combination with the double-end tensioning screw subjected to insulation treatment, the problems that a traditional rotor iron core end punching sheet is prone to loosening, stress concentration and large eddy-current loss are caused by burrs, dynamic balance precision is poor and the like are effectively solved, and the service life of the rotor iron core end punching sheet is prolonged. And the structural rigidity, the operation stability and the motor efficiency of the rotor iron core are obviously improved.

The utility model discloses a rotor, motor and compressor relates to motor equipment technical field, rotor includes permanent magnet and rotor iron core, rotor iron core has rotation axis, rotor iron core includes a plurality of laminations, the plurality of laminations are laminated along rotation axis, each lamination forms a plurality of magnetic slot, and the plurality of magnetic slot forms the permanent magnet. The magnetic slots of the plurality of laminations are communicated with each other along the direction of the rotating axis so as to form an accommodating slot for accommodating the permanent magnet; each lamination forms a magnetic bridge or a communication groove at one magnetic groove, the magnetic bridge is located at the edge of the lamination and blocks the magnetic groove, and the communication groove is communicated with the magnetic groove and the external space; the number of the laminations is defined as N, the number of the magnetic grooves in every two adjacent containing grooves is 2N, the number of the magnetic bridges is M, and the ratio of M to 2N ranges from 0.2 to 0.5. The utility model aims to reduce the magnetic flux leakage of the rotor iron core on the basis of ensuring the structural strength through the rotor iron core so as to improve the motor efficiency.

The invention relates to a motor dynamic driving control method, device and system based on deep learning prediction. The method comprises the following steps: S1, acquiring current motor operation data; s2, predicting future motor operation data according to the current motor operation data through a prediction model; s3, judging a future motor working condition according to the future motor operation data; s4, selecting a control algorithm according to the future motor working condition; and S5, by taking the current motor operation data as an input condition, generating a control signal through the control algorithm. According to the method, the future change of the working condition of the motor can be mastered in time through the prediction model, so that a proper control algorithm is actively switched according to the future change, the dynamic response capability is relatively high, and relatively high motor efficiency and relatively good stability can also be obtained under special working conditions.

The invention discloses a new energy automobile motor efficiency control method and system, and relates to the technical field of efficiency control, and the method comprises the steps: carrying out the data collection of the operation state of a new energy automobile motor, and constructing a motor digital twin efficiency model; performing dynamic coupling analysis based on the motor digital twin efficiency model to extract a multi-field coupling influence factor, predicting the degradation trend of the motor efficiency parameter of the new energy vehicle based on the multi-field coupling influence factor, and determining a degradation trend prediction result; the method comprises the steps of establishing an environment disturbance factor library, obtaining real-time road condition topological data and driving behavior characteristic data, constructing a dynamic disturbance scene set based on the environment disturbance factor library, the real-time road condition topological data and the driving behavior characteristic data, and confirming an optimization strategy based on the dynamic disturbance scene set; and generating a dynamic efficiency regulation and control instruction set based on a degradation trend prediction result and an optimization strategy, and realizing energy efficiency closed-loop optimization control of the driving motor. The method has the effect of improving the motor control efficiency of the new energy automobile.

The invention discloses a stator core, a stator, a motor, a power assembly and a vehicle, the stator core comprises a plurality of stator punching sheet groups, the plurality of stator punching sheet groups are laminated along the axial direction of the stator core, and each stator punching sheet group comprises a plurality of stator punching sheets laminated along the axial direction of the stator core; wherein the size of the stator punching sheet group along the axial direction of the stator core is L2, the number of welding spots between two adjacent stator punching sheet groups is N, the size of the welding spots along the axial direction of the stator core is L1, the outer diameter of the stator punching sheet is R, and L1, L2, N and R meet the relational expression that L1 / L2 is greater than or equal to 0.12 and less than or equal to 0.6, and N / R is greater than or equal to 0.026 and less than or equal to 0.043. Therefore, by designing the stator iron core, iron loss deterioration caused by traditional integral welding can be reduced on the basis of satisfying the binding force between the stator punching sheets, so that the structural firmness of the stator iron core and the motor efficiency are improved.

The invention discloses a stator and rotor punching sheet and magnetic steel for a concentrated winding type frameless torque motor, and belongs to the technical field of concentrated winding type motors, the stator and rotor punching sheet comprises a rotor punching sheet, a stator punching sheet and magnetic steel, and the center of the rotor punching sheet is provided with a rotor iron core; the stator punching sheet is composed of yoke parts and tooth parts, the tooth parts are trapezoidal teeth, the tooth parts and the stator grooves are distributed at equal angles, the tooth parts and the stator grooves are alternately arranged, and the stator grooves are straight grooves; the inner side of the stator punching sheet is also provided with a rotor punching sheet and magnetic steel, the rotor punching sheet and the magnetic steel form a motor rotor, and the motor rotor is a surface-mounted rotor. According to the stator and rotor punching sheet and the magnetic steel for the concentrated winding type frameless torque motor, the winding grooves of the stator iron core are flat-bottom straight grooves, the flat copper wires are wound in the winding grooves, the flat wire coils are fixed to the tooth portions through glue, integral potting is carried out after fixing is completed, and compared with a traditional pear-shaped groove for containing round wire windings, the stator and rotor punching sheet is simple and firm in structure, high in groove fullness rate, high in motor efficiency and improved in stability.

The invention discloses an axial magnetic flux shaftless rim propeller which comprises a machine shell, a rotor and two annular stators, the rotor is located in the machine shell, the rotor and the machine shell are connected through a water lubrication radial bearing, the two annular stators are arranged on the two sides of the rotor respectively, and water lubrication thrust bearings are arranged between the annular stators and the rotor respectively. According to the shaftless rim propeller, the axial size is reduced, the axial magnetic pulling force is balanced, compared with a radial magnetic flux shaftless rim propeller, larger torque output can be provided under the same size, and the output power of a motor is improved. In addition, the shaftless motor structure reduces the axial size of the ship propeller, provides sufficient space for arrangement of thrust bearings, remarkably reduces friction and abrasion, reduces noise, effectively improves the performance of the motor, prolongs the service life of the motor, and further improves the operation stability and efficiency of the motor.

The invention relates to the field of power control, and particularly discloses an electric four-wheel drive torque distribution method based on a climbing working condition, which comprises the following steps: defining vehicle state parameters, power system parameters, vehicle real-time driving state parameters and road condition parameters; carrying out torque calculation by utilizing Julia, considering shaft load, friction coefficient, motor efficiency and yaw velocity correction, obtaining a comprehensive weight of a front shaft and a rear shaft, and carrying out normalized torque distribution; and establishing model simulation through Modelica, and verifying the effectiveness of the distribution scheme. According to the invention, the climbing performance of the vehicle can be improved, the control flexibility and driving stability of the vehicle are improved, the energy consumption is reduced, the dynamic stability is enhanced, and the method is suitable for power control of the electric four-wheel-drive vehicle under the climbing working condition.

The invention provides an efficiency optimization control method of a permanent magnet synchronous motor and related equipment. The method comprises the following steps: acquiring an output current of an inverter; constructing an inverter loss model based on the output current of the inverter and the inverter loss coefficient; constructing a total loss model based on the electromagnetic loss model, the inverter loss model and an equivalent conversion method; constructing a current population by taking the plurality of d-axis current values as individuals; and performing optimization solution based on the total loss model, the current population, a PID search algorithm and an artemisinin optimization algorithm to obtain a global optimal solution and control the permanent magnet synchronous motor. According to the scheme, the driver loss is added into the total loss model, and efficiency optimization can be carried out on the whole motor driving system; in order to solve the problem that a traditional method is not suitable for an IPMSM, a PID search algorithm and an artemisinin optimization algorithm are combined, parameter search is carried out on a motor efficiency optimal point by simulating an incremental PID controller adjusting mechanism, a global optimal solution is obtained, and therefore optimal control over the click efficiency is achieved.

The invention relates to the technical field of motor monitoring, and particularly discloses an intelligent monitoring system based on a rare earth permanent magnet variable frequency motor. A surface-mounted rare earth permanent magnet synchronous motor adopts a surface-mounted design, the motor is embedded into a magnetic material, a rotor and a stator magnetic field operate synchronously during normal work, and a rotor winding has no induced current; rotor resistance and hysteresis loss do not exist, the efficiency of the motor is improved, and the permanent magnet variable frequency motor not only can reduce resistance loss, but also can effectively improve a power factor; magnetic stability analysis, operation simulation and temperature screening are integrated, a section temperature extreme point is excavated, a time sequence trend of the section temperature extreme point is tracked, a core heat source is accurately positioned, and a heat source area is divided according to a preset threshold value based on a triangular mesh, so that real-time identification and partitioning of the internal heat source of the motor are realized, the internal core heat source is accurately positioned, and overheating of a blind area is avoided; and in combination with the temperature-dependent demagnetization boundary, the magnetic safety margin is calculated in real time, early warning or load limiting is performed in time, and irreversible demagnetization is prevented.

A hierarchical control system for torque distribution of hub motor-driven electric vehicles constructs a hierarchical controller with upper and lower layers. An upper layer torque distribution controller's drive torque distribution control strategy is determined through a fuzzy control module. A lower layer torque distribution controller receives the torque, yaw velocity, and side-slip angle from the upper layer torque distribution controller and performs drive torque distribution control based on the motor efficiency map or tire slip rate by using the torque, yaw velocity, side-slip angle and actual values of vehicle feedback to obtain a generalized torque output to a wheel hub motor model for calculating to obtain a target torque and inputting it into a 7-degree-of-freedom vehicle model. The 7-degree-of-freedom vehicle model feeds back vehicle states to the upper layer torque distribution controller to form a closed-loop control, achieving energy-saving control and improving handling stability and safety.

The invention discloses a connecting structure of frameless torque motor flat wire windings, which belongs to the technical field of frameless torque motors, and comprises a stator consisting of a stator core and windings, the stator core comprises stator slots and tooth parts, each phase of winding consists of N sets of two groups of flat wire coils, the width of the flat wire coil is gradually increased from the inner diameter side of the stator to the outer diameter side of the stator, the current direction of the coil accords with regular circulation of positive and negative and positive, each set of coil connecting wire is formed by connecting in the same layer, and compared with a coil with the outer side and the inner side connected with a cross-layer wire, the end space can be reduced, and the end height can be reduced. Compared with a round wire winding, the connection structure of the frameless torque motor flat wire winding has the advantages that the slot fullness rate can be increased, the motor efficiency is high, the stability is improved, the space utilization in a stator slot can be greatly improved through a specific wire connection mode, the space waste in the slot is reduced, the windings are more compact, the overall consumables are less, and the connection and assembly are more convenient.

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 relates to a transverse magnetic circuit module complementary magnetic flux reverse motor, comprising: a stator assembly comprising a plurality of U-shaped stator cores arranged circumferentially, a front module permanent magnet, a rear module permanent magnet, a front module armature winding and a rear module armature winding; and the rotor assembly comprises a front rotor module and a rear rotor module which are axially distributed and have the same structure, rotor salient pole teeth are respectively arranged on the inner side surfaces of the front rotor module and the rear rotor module along the circumferential direction, and the rotor salient pole teeth on the front rotor module and the rotor salient pole teeth on the rear rotor module are arranged in a staggered manner along the circumferential angle. The electromagnetic torque density is remarkably improved through magnetic circuit topology optimization, more excellent power output characteristics are achieved, meanwhile, armature winding turn chain magnetic flux directions of the front module and the rear module are opposite, the phase difference is 180 deg electrical angle, magnetic linkages of the two modules are complementary, even harmonics of the magnetic linkages are counteracted after synthesis, in addition, the unique stator structure improves the air gap magnetic density of the motor, and the motor efficiency is improved. And the motor power density is improved, and the application and popularization value is extremely high.

The invention provides a flow matching control system and an electric engineering machine, and relates to the technical field of flow matching control. The power source flow matching mode of the existing electric engineering machinery has the problem of insufficient efficiency improvement space. According to the system, the motor efficiency model and the hydraulic pump efficiency model are established, the rotating speed of the motor and the displacement of the hydraulic pump are dynamically adjusted according to the target flow of the system by combining an optimization algorithm and weighting processing, so that the power source keeps high-efficiency operation in real time, and the overall efficiency of the system is improved. The device is suitable for combination of various power sources and hydraulic systems, can be widely applied to the field of electric engineering machinery, and has the advantages of remarkable energy-saving effect and dynamic response.

The invention discloses a miniature disc type motor and a miniature fan thereof, the miniature disc type motor comprises a PCB stator assembly and a driving control circuit, the PCB stator assembly comprises a PCB and a stator coil arranged on the PCB, the stator coil is connected with the driving control circuit, and the driving control circuit is connected with the PCB. The structural layout of the stator coil and the rotor magnet adopts a two-phase four-slot six-pole, three-phase six-slot four-pole or three-phase six-slot eight-pole structural layout, and better slot-pole matching of the miniature disc type motor is adopted, so that unbalanced radial magnetic pulling force is reduced, the torque fluctuation of the motor is improved, the vibration noise of a product is reduced, the sound quality of the product is improved, and the service life of the product is prolonged. The protrusion ratio of the product can be reduced to below 4dB; the optimized three-phase six-slot quadrupole can improve the motor efficiency by about 5%, the optimized three-phase six-slot octupole can improve the motor efficiency by about 12%, the optimized two-phase four-slot six-pole structure can improve the motor efficiency by about 5%, in addition, the overall layout is reasonable, the winding space is effectively increased, miniaturization and flattening of the miniature fan are better facilitated, and the service life of the miniature fan is prolonged. The size is further reduced.

The present invention relates to the field of vehicle power arrangement, and in particular to a dual-mode electric drive system and a vehicle. A first motor and a second motor in the dual-mode electric drive system are connected to an output end by means of a gear transmission structure, and a clutch is provided between the first motor or the second motor and the output end so as to selectively engage the first motor or the second motor with the dual-mode electric drive system. When a vehicle is in an operating condition of a lower power demand, one of the motors can be disengaged from the dual-mode electric driving system by means of the clutch, so that only one motor is used for driving, which helps to keep the motor at relatively high output power, thus solving the problem in the prior art that both motors in a dual-motor electric driving system outputting power leads to low output power of every single motor, and accordingly the low output power of the two motors leads to a decrease in motor efficiency when a vehicle is in an operating condition of a lower power demand.

The invention relates to the technical field of motor systems, in particular to a synchronous motor driving system analysis method and device, and can solve the problems that an existing method relates to an optimization process, so that the calculated amount is generally large, the requirement for a processor is high, and part of technologies need to identify motor electromagnetic parameters, so that the cost is low to a certain extent. And the requirement of the control strategy on the computing power is increased. The method comprises the following steps: constructing a motor system coupling model; analyzing the loss of the motor system based on the coupling model; calculating the loss of the motor system under different switching frequencies according to the loss analysis of the motor system; selecting a series of working condition points, and respectively simulating and acquiring the operation efficiency of the motor and the inverter under the control of different switching frequencies; according to the motor efficiency and the inverter efficiency, the overall efficiency of the motor driving system is calculated, and the switching frequency value when the efficiency of the motor driving system is the highest on each working condition point is obtained, namely, the optimal switching frequency corresponding to the working condition point is obtained.

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 field of motor control, and discloses a double-stator motor inner and outer stator torque real-time distribution method, which comprises the following steps: establishing an outer stator motor efficiency model according to the torque and the rotating speed of an outer stator motor and the copper loss and the iron loss of the outer stator motor; establishing an inner stator motor efficiency model according to the torque and the rotating speed of the inner stator motor and the copper loss and the iron loss of the inner stator motor; based on the outer stator motor efficiency model and the inner stator motor efficiency model, establishing a double-stator motor overall efficiency model containing a torque distribution coefficient; under the current constraint condition of the outer stator motor and the inner stator motor, the overall efficiency model of the double-stator motor is maximized based on a sequential quadratic programming algorithm, and the optimal torque distribution coefficient is obtained. According to the method, the efficiency model of the motor can be reasonably constructed, the torque distribution coefficient is optimized in real time, the torque of the double-stator motor is dynamically adjusted, and the energy loss in the operation process is reduced on the basis of meeting the operation efficiency of the motor.

The invention relates to the technical field of motor control, and discloses a multi-objective optimization synchronous reluctance motor vector control system, which comprises a multi-objective optimization algorithm module. According to the invention, through the multi-objective optimization algorithm module, an improved NSGA-II and PSO combined algorithm is used to collaboratively optimize multi-objective functions such as motor efficiency, torque ripple and dynamic response, so that the comprehensive performance of the motor is remarkably improved, and the requirements of complex scenes are met; the parameter online adjustment module adaptively adjusts controller parameters in real time based on a fuzzy control strategy, the stability and adaptability of the system are enhanced, and the stability of each operation stage of the motor is guaranteed; the current decoupling control module introduces a feedforward decoupling link to eliminate current coupling, and combines signal processing and control algorithm to execute anti-interference measures of the module, so that the current control precision and the system reliability are improved; the compatibility interface and the self-learning and optimization module realize remote monitoring and parameter setting, and can realize self-learning optimization according to operation data, expand application scenes and meet user change requirements.

The invention relates to an integral water-cooling radiator including a water cooling block. The water cooling block includes a fixed base, the fixed base is formed with a first flow chamber and a second flow chamber, and the fixed base is formed with a first inlet and a first outlet. A water cooling liquid flows into the first flow chamber, and under the drive of an impeller member, is discharged via the first outlet, such that the water cooling liquid forcibly carries away heat for dissipation. During dissipation, the water cooling liquid further flows through the second flow chamber. As compared with a single flow chamber, the increase of the flow regions causes a significant decrease in load of the impeller member. This prolongs the service life and increases the motor efficiency, so as to improve the pump efficiency, thus significantly improving the flow efficiency of the water cooling liquid.