10680 results about "Stator" patented technology

The invention provides a turbine blade design method which comprises the following steps: S1, dividing a turbine blade profile into four sections at equal intervals along the radial direction according to the size of a turbine, and calculating section parameters of a middle-section turbine blade profile; s2, connecting the four sections by adopting a third-order Bezier curve, defining a blade front edge angle theta as an included angle between the Bezier curve and a blade front edge radial inlet angle alpha, and generating a three-dimensional blade model by changing the inclination angle theta of each section; s3, performing optimization to obtain an optimized theta parameter; and S4, according to the optimized theta parameter, fitting each section blade profile by using a third-order Bezier curve to generate a turbine stator and rotor three-dimensional model. According to the method, the machine learning method is applied to design of the turbine blade, the three-order Bezier curve, the CFD numerical simulation method and the particle swarm optimization are utilized, the blade parameters are given, the geometric parameters can be quickly and accurately predicted, the calculated amount is reduced, the cost is reduced, the design efficiency is improved, and the quality of the designed blade is guaranteed.

The invention relates to the technical field of industrial automation control, and discloses a water-based paint production and processing equipment control system, which comprises the following steps: acquiring stator current and rotor angular velocity, and reconstructing total load torque by using a sliding mode algorithm; extracting an input power low-frequency component to construct a heat dissipation slow manifold, and calculating a thermal drift disturbance component and an orthogonal residual component through orthogonal projection; on the basis of a two-component generation superposition instruction closed-loop adjustment driving mechanism, a double-time-scale orthogonal projection mechanism is utilized, non-structural thermal drift interference is automatically stripped under the condition that heat transfer parameters of equipment do not need to be predicted, the problem of control divergence caused by model parameter mismatch is solved, and decoupling control over the real rheological state of materials is achieved.

The invention discloses a wearable knee joint self-powered sensing system and a use method, relates to the technical field of motion monitoring, and solves the technical problem that a motion detection sensor integrating light weight and a self-powered mode is lacked in the prior art. The motor comprises a stator part and a rotor part which are rotationally arranged, a center shaft penetrating through the stator part is arranged on the rotor part, and the stator part and the rotor part are rotationally connected through the center shaft; and a motion state monitoring module and a self-powered module are sequentially and coaxially arranged at the connecting part of the stator part and the rotor part, so that the rotation angle and direction of the knee joint are accurately detected, and key data support is provided for subsequent motion analysis and health monitoring.

A blood pump includes an impeller; a drive shaft coupled to the impeller and configured to rotate with the impeller; and a rotor coupled to the drive shaft and configured to rotate with the drive shaft. The rotor includes a driven magnet having an outer surface. A corrosion-resistant coating may be disposed on the outer surface of the driven magnet. A stator is disposed adjacent the rotor and configured to drive the rotor, causing the rotor to rotate; and a motor is configured to drive the stator. A protection assembly may be disposed adjacent the stator and configured to receive an end of the drive shaft, and may include a protection assembly housing enclosing a protective fluid chamber, the protective fluid chamber including the driven magnet and at least a portion of a bearing configured to engage the end of the drive shaft.

The invention relates to the technical field of inverter power control, and discloses a given current-based inverter power control method and system, and the method comprises the steps: calculating a fluctuation compensation parameter based on a bus voltage, and carrying out the real-time compensation of a q-axis basic current, and obtaining a first given q-axis current; predicting the bus voltage of the next period and correcting the first given q-axis current in advance to obtain a second given q-axis current; on the basis of the stator voltage saturation state, weak magnetic d-axis current given is generated, low-pass filtering is carried out on the second q-axis current given and the weak magnetic d-axis current given, and a d-axis current instruction and a q-axis current instruction are obtained; a PWM driving signal corresponding to a dq-axis current instruction is generated, an inverter switch is controlled, meanwhile, a power deviation signal is collected to update q-axis basic current, accurate prediction of bus voltage and advanced correction of given current are achieved, compared with traditional lag compensation, the dynamic response is faster, and the power control precision and the operation stability are improved.

The invention relates to an aircraft electric drive oil cooling structure which comprises an outer rotor assembly, a stator assembly, a controller assembly, an oil pump and a heat dissipation assembly, the stator assembly comprises a stator shell and a winding, a sealing cover is further fixed to the outer side of the winding, and a cooling cavity is formed between the sealing cover and the stator shell; a bottom plate is further arranged at the bottom of the stator shell, the controller assembly is fixed in a mounting cavity formed by the bottom plate and the stator shell and comprises a circuit board and a cooling plate which are close to each other, the circuit board is connected with the winding, an oil duct A is further arranged on the bottom plate, an oil inlet pipe and an oil outlet pipe are arranged on the cooling plate, and an oil duct B communicated with a cooling cavity is further arranged on the bottom plate; the heat dissipation assembly comprises a heat dissipation fin set and a fan assembly, the heat dissipation fin set and the oil pump are both fixed to the lower portion of the bottom plate, heat dissipation fins form a ring and are arranged outside the oil pump in a surrounding mode, the heat dissipation fin set, the oil pump and the bottom plate are communicated with one another, and the fan assembly is fixed to the lower portion of the heat dissipation fin set. Efficient, light-weight, high-integration-level and reliable heat dissipation of the electric drive of the aircraft is achieved.

An angular displacement sensor based on electric field modulation. The sensor comprises a stator base (1) and a rotor base (2) which are arranged one above the other. One or more pole-pair units are provided on the side surface of the stator base (1) facing the rotor base (2), each pole-pair unit comprises at least three sensing electrode groups which are arranged at intervals circumferentially around the center of the stator base (1), and each sensing electrode group comprises one excitation electrode (1-1) and one sensing electrode (1-2) which are spaced apart circumferentially around the center of the stator base (1); and modulation unit groups, the number of which matches that of pole-pair units and which can respectively correspond to the pole-pair units circumferentially around the center of the rotor base (2) are provided on the side surface of the rotor base (2) facing the stator base (1), each modulation unit group comprises one modulation unit F (2-1) and one modulation unit G (2-2) which are arranged circumferentially around the center of the rotor base (2), and the modulation unit F (2-1) can correspond to at least one sensing electrode group in the pole-pair units circumferentially around the center of the rotor base (2).

Weed seeds are destroyed in the chaff from a combine harvester by primary and secondary destructors where the primary feeds to the secondary. The secondary can use repeated high speed impacts caused by a rotor mounted in one of a pair of side by side housings which accelerate the discarded seeds in a direction centrifugally away from the rotor onto a stator including angularly adjustable stator surfaces around the axis. The primary can also use an impact arrangement of a different and simplified structure or can use another destruction modality such as radiation. The primary is mounted at a transfer device including a transverse auger which carries the chaff and weed seeds from the rear of the sieve to the secondary.

The invention belongs to the technical field of mechanical transmission, and discloses a conductor ring and magnetic resistance array composite permanent magnet thrust bearing and a damping force calculation method. The conductor ring and magnetic resistance array combined type permanent magnet thrust bearing realizes the bearing of non-contact magnetic thrust through the combination of the eddy current ring and the magnetic group array. When thrust from a propeller at the stern end of a propulsion shafting acts, the rotor magnetic group array axially moves, axial traction force is generated between the rotor magnetic group array and the stator magnetic resistance array to counteract the thrust action from the axial direction, meanwhile, the magnetic group array cuts the vortex ring, induction damping is generated on the surface of the vortex ring, damping force is formed, and the vortex ring is driven to rotate. And therefore, the longitudinal vibration during transmission of the propulsion shafting is reduced, and the propulsion shafting system is more silent and stable during operation. In addition, the damping force calculation method does not need complex three-dimensional structure modeling and grid division, is simple in solution, high in universality and short in calculation time consumption, and has high engineering application practical value.

The utility model discloses a brushless servo motor easy to install and debug, which comprises a shell, a rotor, a stator and an encoder assembly, and is characterized in that the rotor comprises a rotating shaft and a magnetic ring; the shell comprises a shell and a first end cover; the stator comprises a stator core and a winding; the magnetic ring is an M-pole magnetic ring; the encoder assembly comprises a PCB and a magnetic induction device, the magnetic induction device comprises N groups of Hall sensors, and N is 1 or 2; each group of Hall sensors comprises two Hall sensors, and one Hall sensor rotates 90 degrees around the center line of the rotating shaft to reach the position of the other Hall sensor; each Hall sensor is eccentrically arranged relative to the center line of the rotating shaft, and a gap is formed between each Hall sensor and the magnetic ring in the axial direction of the rotating shaft. According to the utility model, the Hall sensor directly senses the magnetic field of the magnetic ring of the rotor to determine the angular position of the rotor, an independent sensing magnet does not need to be arranged on the rotor, the structure is simple, and the installation process is simplified.

The invention discloses a joint module of a humanoid robot. The joint module comprises a shell, a first cooling pipeline, a motor and a speed reducing mechanism, wherein the motor and the speed reducing mechanism are coaxially arranged in the shell; the motor comprises a main shaft rotationally arranged in the shell, and a first rotor, a stator and a second rotor which are sequentially arranged along the axial direction of the main shaft; the annular base of the stator is fixed in the inner cavity of the shell; the main shaft is coaxially arranged on the inner ring of the annular base, and the two ends of the main shaft extend out of the stator and are connected with the double rotors respectively. Stator iron cores which are distributed at intervals along the circumferential direction are arranged on the annular base; the shell is provided with an internal oil way, and the internal oil way comprises a spiral oil way surrounding the periphery of the speed reducing mechanism. And the first cooling pipeline is annularly fixed on the inner ring of the stator. On the basis that a single-stator double-rotor motor structure is adopted, the first cooling pipeline is arranged on the stator, and the spiral oil way is arranged on the periphery of the speed reducing mechanism in a surrounding mode, so that the joint module is effectively cooled, and the service life of the joint module is prolonged.

The invention discloses an AC excitation system rotor initial position on-line identification method and system, and the method comprises the steps: collecting a stator three-phase voltage signal when a stator is no-load, carrying out the Clarke conversion of the signal, obtaining a voltage component under a static coordinate system, and carrying out the low-pass filtering processing; calculating a stator flux linkage based on the stator current and the processed voltage component, and calculating a rotor flux linkage based on the rotor current; the rotor initial position offset is continuously accumulated through closed-loop adjustment by calculating the stator and rotor flux linkage angle and the phase difference until the phase difference approaches zero, and the accumulated rotor initial position offset is output; and combining the mechanical angle output by the encoder with the accumulated rotor initial position offset to obtain a corrected rotor position angle, and updating the corrected rotor position angle to an excitation system. According to the method, the in-phase characteristics of stator and rotor flux linkages are utilized, and the optimally designed low-pass filter is combined, so that the identification precision of the initial position of the rotor is remarkably improved, and the zero offset of the encoder is effectively compensated.

The inductive position detector includes: a stator having a wiring board; a rotor having a non-conductive component disposed in opposed relation to the stator and rotatable relative to the stator about a rotation axis; a conductor pattern held by the non-conductive component so as to have cyclicity (geometrical periodicity) circumferentially about the rotation axis, and movable to pass through a rotation track defined about the rotation axis as the rotor is rotated; and a plurality of chip inductors surface-mounted on a major surface of the wiring board of the stator in opposed relation to the rotation track so as to have different spatial phases with respect to the conductor pattern, and respectively serving as detection coils that detect a magnetic field change occurring due to the passage of the conductor pattern.

The invention discloses an automobile engine which comprises an engine body, a crankshaft and an air conditioner generator. The air conditioner generator comprises a stator and a rotor and is placed on the front portion of the automobile engine and driven by the crankshaft of the automobile engine, and the axis of the stator of the air conditioner generator is coaxial to the axis of a main shaft neck of the crankshaft of the automobile engine. The automobile engine can supply power to vehicle-mounted air conditioner systems, and the air conditioner generator is arranged at the front end of the crankshaft of the automobile engine. The automobile engine requires no belt for driving and is simple in structure and convenient for the vehicle-mounted air conditioner system to adopt the whole distribution structure.

The invention relates to the technical field of wireless power supply, and provides a non-contact power supply transmission line, which comprises a transmission module and a mobile power taking module, and is characterized in that the transmission module comprises an excitation cable and a linear transmission unit, and the linear transmission unit comprises a plurality of linear stators along the transmission direction; the movable electricity taking module comprises a rotor and a first electricity taking piece, and the rotor moves under current excitation; the first power taking piece can act with a magnetic field generated by electricity around the excitation cable and generate current so as to supply the current to an electric element installed on the mobile power taking module. According to the non-contact power supply transmission line, the mover is driven to move in a magnetic drive mode, and in the moving process of the mover, the first power taking part can be always coupled with the excitation cable, so that electric energy is uninterruptedly obtained to be supplied to an electric element, and the first power taking part does not need to be in contact with the excitation cable when obtaining the electric energy, so that the power utilization efficiency is improved. The problems that power cannot be continuously supplied to the execution part, and the conveying continuity of the rotor cannot be guaranteed are effectively solved.

The invention relates to an aero-engine stator part crack critical dimension comprehensive determination method and system, and belongs to the technical field of aviation, the method comprises the following steps: obtaining an aero-engine typical hot end stator part geometric model and material parameters, and carrying out static strength analysis according to fluid-thermal-solid coupling load characteristics in actual working conditions; inserting an initial crack into a first principal stress plane of a dangerous part of the real component, carrying out crack propagation simulation to determine a crack propagation path, and calculating a critical crack size of a dangerous point; analyzing critical crack sizes under different failure modes, such as cooling failure and buckling failure; and integrating analysis results under the multi-failure mode, and determining a comprehensive critical dimension as a final judgment standard. According to the method, through combination of fracture failure and function failure analysis, accurate judgment of the critical dimension of the crack is realized, limitation of a traditional single fracture criterion is broken through, comprehensive function failure analysis is realized, the accuracy of a maintenance decision is remarkably improved, and a scientific basis is provided for condition-based maintenance decision.

The invention discloses a synchronous generator excitation method based on mathematical modeling and gain scheduling, and relates to the technical field of synchronous generator control, and the method comprises the steps: building a synchronous generator global dynamic mathematical model comprising the electromagnetic dynamic characteristics of a stator winding, a rotor winding and a damping winding through a modeling module; a discretization simulation platform is constructed in a Matlab / Simulink environment by utilizing a simulation module, model parameters are corrected, dynamic adjustment is realized through a gain scheduling excitation controller, an automatic voltage regulator (AVR) adopts PID (Proportion Integration Differentiation) control and comprises a voltage deviation integral separation strategy, and a power system stabilizer (PSS) dynamically adjusts parameters of a lead-lag compensator based on active power. According to the method, the deviation between a model and an actual system can be reduced by more than 30%, the electromechanical oscillation damping ratio within the rated power range of 10%-150% is increased by 25%-40%, the harmonic content of exciting current is reduced to be lower than 5%, the stability of an electric power system and the electric energy quality are remarkably improved, the engineering practicability is high, and the method is easy to transform and upgrade on an existing synchronous generator.

The invention belongs to the technical field of aero-engine high-temperature part test, and particularly relates to a thermal mechanical composite fatigue test device in a turbine blade rotation environment, which comprises a high-temperature gas system, a stator system, a rotor system, a support system, a test system, an auxiliary system and a turbine rotor blade test piece, the high-temperature fuel gas system is used for providing a fuel gas environment for a turbine rotor blade test piece and controlling the high-low temperature circulation state of fuel gas, a combustion chamber is arranged at the front end of the high-temperature fuel gas system and provided with a double-oil-way nozzle, a fuel gas flowing system is arranged at the rear end of the high-temperature fuel gas system, and a blade grid structure is designed for the fuel gas flowing system according to the geometrical shape of a turbine rotor blade. And a spray cooling section is arranged at the rear part of the test section. The device is composed of six core systems including a high-temperature fuel gas system, a stator system, a rotor system, a supporting system, a testing system and an auxiliary system, all the systems work cooperatively, and integrated simulation of the high-temperature fuel gas environment, rotating centrifugal loads and heat-force synchronous circulation is achieved.

The utility model relates to the technical field of fans, in particular to a cooling fan with a side suction type flow channel, which comprises a base, a side suction type flow channel, a side suction type flow channel and a side suction type flow channel, the rotor is rotationally arranged in the accommodating cavity and is provided with an axis; the stator is fixedly arranged in the accommodating cavity and is coaxial with the rotor; the stator is provided with a shaft tube part corresponding to the axis, a first bearing is arranged in the shaft tube part, and the axis is sleeved with the first bearing; the base is provided with at least one side suction type flow channel, and the side suction type flow channel forms an air inlet in the surface, facing the air inlet side, of the base and forms an air outlet in the cavity wall of the containing cavity. An included angle is formed between the extending direction of the axis of the air inlet and the extending direction of the axis of the air outlet. Through the arrangement of the side suction type flow channel, the air inflow in unit time is increased, the performance and efficiency of the fan are improved, more air flows more effectively take away heat, and the heat dissipation effect is improved.

The compressor comprises a shell, a pump body assembly and a motor, the pump body assembly is arranged in the shell, a stator assembly of the motor is fixedly connected with the inner wall of the circumferential shell, and a rotor assembly of the motor is located in an annular space of the stator assembly and connected with a crankshaft. The oil baffle cap is located at the uppermost end of the rotor assembly and can conduct oil-gas separation on mixed gas from the pump body assembly. The height of the flanging structure of the oil baffle cap is h, the height between the upper end face of the circumferential shell and the upper end face of the stator core in the vertical direction is the height H of an upper cavity of the shell, and the nominal working volume of the compressor is V. According to the compressor, the value of H * h / V is reasonably set to be within the range of (0.97-3.53) * 10 <-2 > mm <-1 >, the flowing resistance of airflow and the separation efficiency of lubricating oil can be balanced, and the working efficiency of the compressor is improved. Therefore, the operation performance and reliability of the compressor are improved, meanwhile, the situation that the size of the compressor is too large is avoided, and the compact design of the compressor structure is facilitated.

A stator for an electric machine includes a stator core defining a slot extending in an axial direction from a first end to a second end, a wire disposed in the slot, a coolant pipe disposed in the slot and extending in the axial direction from the first end to the second end, the coolant pipe extending from a pipe inlet to a pipe outlet, and a thermally conductive potting material disposed in the slot between the coolant pipe, the wire, and the stator core.

The invention discloses a surface-mounted permanent magnet synchronous motor sensorless high-performance sliding-mode control method, and the method comprises the steps: designing an improved self-adaptive terminal sliding-mode switching function for the problem of high-frequency buffeting of a sliding-mode observer caused by the fixed gain design of the switching function; and dynamically adjusting the gain of the switching function according to the sum of the stator current error and the integral thereof under the two-phase static coordinate system so as to suppress high-frequency buffeting and improve the estimation precision. In order to further improve the performance of the position sensorless control system, a reaching law in a sliding mode controller is optimized, a novel composite gain self-adaptive sliding mode reaching law is designed, the reaching law combines a self-adaptive gain term, a nonlinear exponential term and a linear term, the system state is accelerated to approach when being far away from a sliding mode surface, buffeting is reduced when the system state approaches, and the control precision of the position sensorless control system is improved. Therefore, the dynamic response speed and buffeting suppression capability of the control system are balanced.

The invention discloses a doubly-fed induction generator fault detection method combining a sliding-mode observer and a bilateral cumulative sum algorithm, and the method comprises the following steps: designing a doubly-fed induction generator rotor current sliding-mode observer based on the combination of a novel reaching law and a doubly-fed induction generator state equation; carrying out stability and convergence analysis on the designed novel reaching law by adopting a Lyapunov stability theory; and the fault detection method of the doubly-fed induction generator is designed in combination with the optimized bilateral accumulation sum algorithm. A rotor current sensor fault, an input interference voltage fault, a voltage drop fault and a stator turn-to-turn short circuit fault are introduced. The rotor current tracking performance of the designed sliding-mode observer under different doubly-fed induction generator faults is verified by using a residual value obtained by comparing a doubly-fed induction generator rotor current value estimated by the sliding-mode observer with an actual rotor current output value; and meanwhile, the reliability of the designed doubly-fed induction generator fault detection method based on the optimized bilateral cumulative sum algorithm is verified. The doubly-fed induction generator fault detection method combining the sliding-mode observer and the bilateral cumulative sum algorithm has the advantages of being high in tracking precision and accurate in fault state characterization, meanwhile, weak fault features can be effectively converted into digital signals to be output, and faults of the doubly-fed induction generator are detected.

The invention discloses an all-electric turning execution mechanism and a turning anti-swing control method for a front wheel of an unmanned aerial vehicle, the all-electric turning execution mechanism comprises a motor, an electromagnetic clutch, a parallel gear box and an output gear, the electromagnetic clutch comprises a stator, a rotor and an armature, the stator is fixedly connected with a shell of the motor, and the rotor is connected with an output shaft of the motor; the armature is connected with a high-speed shaft of the parallel gearbox, and the output gear is fixedly connected with a low-speed shaft of the parallel gearbox. The motor, the electromagnetic clutch, the parallel gear box and the output gear are designed in an integrated mode, double optimization of the structure and functions is achieved, the number of parts and the connecting complexity are greatly reduced, and the requirements of the unmanned aerial vehicle for light weight and compact layout are met; by means of the connection and disconnection characteristics of the electromagnetic clutch, accurate active anti-swing and front wheel turning control can be achieved through linkage of the motor and the parallel gear box during power-on, and passive anti-swing can be achieved through a mechanical structure during power-off.

The invention discloses a vibration sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, a sound production unit of the vibration sound production device comprises a first vibration system and a first magnetic circuit system, and the vibration unit comprises a vibrator assembly suspended on the periphery of the sound production unit and stator assemblies located on the two opposite sides of the sound production unit. Two driving coils of the stator assembly are located on the two sides of the sound production unit in the second direction, the stator assembly drives the vibrator assembly to vibrate in the second direction, and the projections of the first magnetic circuit system and the vibration unit in the first direction are both located in the projection range of the vibrating diaphragm assembly in the first direction; the side part of the shell is provided with a limiting part extending towards the accommodating space, and the limiting part is located on the side, facing the vibrating diaphragm assembly, of the vibrator assembly. According to the vibration sound production device, the sound production unit and the vibration unit are integrated, stacking arrangement is not needed, the functions are mutually independent and do not interfere with each other, and the thickness of a product is reduced while the performance requirements of the sound production unit and the vibration unit are met.

The invention discloses production equipment of a stator core, and aims to provide a stator core processing production line which is high in automation degree, can grab a stator core with a corresponding thickness at a time, and can synchronously detect the thickness of an oil hole and the thickness of the core during production, and a control method of the stator core processing production line. According to the technical scheme, the automatic production line is characterized in that a circulation table moves on a transmission frame and passes through all machining stations, feeding of stator iron cores with the corresponding thickness, penetrability detection of stator iron core oil holes, thickness detection of the stator iron cores and sheet adding and reducing control over the stator iron cores are achieved, and automatic production of the stator iron cores is achieved; the iron core can be transferred through the sheet taking and feeding device, the thickness of the transferred iron core can be adjusted by adjusting the depth of a material taking groove, the overall machining efficiency is high, the thickness and quality of the iron core can be synchronously detected in real time, the overall production efficiency is high, the labor cost and the reject ratio of products are greatly reduced, and the production efficiency is improved. The method is suitable for the technical field of stator processing.

A progressive cavity pump rotor can include a scroll portion, which can be configured to interface with a stator, and a head portion, which can be configured to be coupled to a coupling rod with a non-collinear joint, where the scroll portion can be releasably coupled to the head portion with a collinear joint.

The utility model provides a magnetic drive conveying system and a magnetic drive conveying device.The magnetic drive conveying system comprises a stator conveying line which comprises a plurality of linear stator modules, and each linear stator module comprises a linear armature winding and a limiting track; the first reversing stator module comprises a first conveying path and a second conveying path, and the first conveying path and / or the second conveying path are / is connected with the linear stator module; the second reversing stator module comprises a converging end, a first shunting end and a second shunting end, a third conveying path is formed between the converging end and the first shunting end, a fourth conveying path is formed between the converging end and the second shunting end, and at least one of the converging end, the first shunting end and the second shunting end is connected with the linear stator module; and the bridging stator module is connected with the first commutation stator module and / or the second commutation stator module. In this way, the conveying direction is changed without occupying extra space, and the conveying efficiency is high.

The utility model discloses a stator wire pressing device, which comprises a workbench and a wire body, the wire body is provided with a plurality of trays moving along the wire body, the upper side surface of each tray is provided with a wire plugging tool, the workbench is internally provided with two groups of jacking assemblies, the two groups of jacking assemblies are linearly arranged along the wire body and are positioned below the wire body, and the wire plugging tool is positioned below the wire body. The jacking assembly and the tray are located in the same vertical plane, a wire holding assembly used for fixing the end of a stator copper wire is arranged on the upper side face of the workbench, a wire pressing assembly used for pressing the stator copper wire downwards is arranged on one side of the wire holding assembly, and the wire pressing assembly is located on the upper side face of the workbench. The copper wire inserting tool has the advantages of limiting the pre-inserted copper wire and the wire inserting tool and preventing the copper wire from deviating.

The invention relates to the technical field of electrical engineering and intelligent fault diagnosis, and discloses a water pump motor fault diagnosis method and system based on current harmonic characteristics, and the method comprises the steps: collecting stator current, rotating speed and load signals; generating an alpha-beta current component through Clark transformation, constructing an analytic signal, extracting an instantaneous phase, and calculating an instantaneous frequency; a mapping relation is established in combination with the rotating speed, and the current signals are resampled to eliminate frequency dispersion; obtaining a high-resolution harmonic energy distribution diagram by adopting multi-scale synchronous compression wavelet transform; and extracting an energy concentration ratio, a peak offset and a bandwidth expansion coefficient in the characteristic frequency band, inputting the energy concentration ratio, the peak offset and the bandwidth expansion coefficient into the pre-trained multi-layer perceptron classifier, and outputting a fault type. According to the method, through high-precision time-frequency focusing and multi-dimensional feature fusion, the fault recognition accuracy and robustness are remarkably improved, and online diagnosis of multiple typical faults can be achieved only through current signals.