2520 results about "Brushless motors" patented technology

The invention is suitable for the technical field of brushless motor control, and provides an intelligent brushless motor and a control method thereof, and the method is applied to a control system of the intelligent brushless motor. The system comprises a data acquisition module, a model construction module, a training tuning module, a model verification module, a parameter setting module, an operation application module, a wireless communication module, a memory, an alarm, a processing center and an intelligent mobile terminal. The data acquisition module, the model construction module, the training optimization module, the model verification module, the parameter setting module, the operation application module, the wireless communication module, the memory and the alarm are respectively connected with the processing center; the invention also provides an intelligent brushless motor. According to the method, the AI model is constructed and trained by collecting the daily motor operation quality data, and the operation control parameters are matched according to the model, so that various operation quality abnormalities are prevented, and accurate control of the motor is ensured.

The invention provides a brushless motor attitude detection and balance control method and system based on a gyroscope, and relates to the technical field of control, and the method comprises the steps: collecting angular velocity and acceleration data through a six-axis gyroscope, carrying out the noise reduction through wavelet transform, and carrying out the attitude calculation through the combination of an extended Kalman filter and a quaternion algorithm. A rotor position signal is obtained through a magnetic encoder, nonlinear compensation is carried out, and rotating speed data are calculated. A motor state is modeled by adopting a long-short-term memory network, a double-layer adaptive fuzzy neural network controller is constructed, and attitude error compensation and rotation speed fluctuation suppression are realized. A controller model is optimized through particle swarm optimization and a genetic algorithm, a compensation current vector is corrected in real time, and the control precision and stability of the brushless motor are improved. According to the method, the operation efficiency and the dynamic response capability of the brushless motor are effectively improved.

The invention relates to the technical field of motor control, and discloses a brushless motor adaptive control method and system based on artificial intelligence, and the method comprises the steps: collecting the multi-point temperature data of a motor, building a thermal dynamic model, and reconstructing the complete temperature field distribution; identifying a relation function between motor parameters and temperature, and establishing a temperature sensitive parameter model; in combination with temperature field distribution and a temperature sensitive parameter model, learning long-term influence of control actions on temperature distribution, and predicting temperature evolution trends under different control strategies; constructing a multi-objective optimization control strategy, and generating a motor control instruction and a heat dissipation control instruction; dynamically selecting an optimal heat dissipation strategy combination according to the generated control instruction, the current working condition and the predicted heat influence; according to the invention, high-precision control and thermal management optimization of the brushless motor in a temperature change environment are realized.

The invention provides an electronic temperature protection control method for a direct current brushless motor, and relates to the technical field of motor control, and the method comprises the steps: temperature sampling: employing a controller or a motor internal sensor and a winding resistor to estimate and collect a temperature signal in real time; temperature filtering: eliminating noise interference by adopting mean value or Kalman filtering; temperature comparison: comparing the filtered temperature value with a preset multi-level threshold value (from one level to three levels); and protection control is carried out, and measures such as power reduction, current limiting or driving signal closing are taken according to the threshold exceeding degree. Through multi-point sampling, heat conduction installation, dynamic filtering parameter adaptation and threshold setting based on the insulation grade, the temperature monitoring precision and response speed are improved, the problems of response lag and cost of traditional hardware protection are avoided, dynamic and precise temperature protection of the motor is achieved in combination with a thermal response time constant and temperature change rate pre-judgment mechanism, and the reliability of the motor is improved. The service life of equipment is effectively prolonged.

The invention provides a brushless motor multi-axis cooperative control method and system for an industrial robot, and relates to the technical field of control, and the method comprises the steps: processing the real-time parameters of a brushless motor of each joint axis through constructing an extended dynamic model, and obtaining a temperature drift coefficient and a load inertia parameter; a self-adaptive pre-compensation model, a neural network compensator and a recurrent neural network prediction model are combined, a torque control instruction is output, a three-phase current prediction value is calculated, a distributed model prediction controller is adopted to generate an optimal switching sequence, multi-axis cooperative control is achieved, and the system stability and the response speed can be effectively improved.

The invention relates to the technical field of unmanned aerial vehicle flight control, in particular to an unmanned aerial vehicle flight control and monitoring integrated system for power transmission tower inspection, and the system comprises a flight monitoring module which is used for obtaining the wind speed in the environment where an unmanned aerial vehicle is located, the rotating speed of each rotor wing of the unmanned aerial vehicle, and the inclination angle of the unmanned aerial vehicle body; the flight control module is used for acquiring the disturbance value of each rotary wing in each preset time period and the inclination fluctuation degree of the unmanned aerial vehicle body; disturbance factors of the positions of all the rotary wings at the current moment are obtained, and the power of brushless motors in all the rotary wings at the current moment is adjusted; the flight obstacle avoidance module is used for planning a flight path for avoiding obstacles; the tower monitoring module is used for monitoring damage information of the transmission tower; and the wireless communication module is used for transmitting the damage information to a ground station. By correcting the flight attitude of the unmanned aerial vehicle, the stability of the fuselage during flight of the unmanned aerial vehicle is improved, and then the inspection efficiency and quality of the transmission tower are improved.

The invention discloses a wireless cooperative control system and method for a multi-node brushless motor, and the system employs a layered architecture design, and comprises a main control layer, a drive layer, a communication layer, and a software layer. The master control layer is composed of a master node and serves as a task instruction scheduling center of the system, the driving layer is composed of N slave nodes, and N is larger than or equal to 3; the driving layer drives the brushless motor by executing an FOC vector control algorithm and monitors the state of the brushless motor; the communication layer constructs a star network topology based on an ESP-NOW protocol, a direct communication link is established between a master node and N slave nodes, and multi-node cooperative control is realized by adopting a dynamic channel switching mechanism and a timestamp alignment mechanism; and the software layer establishes communication with the main control layer through a USART serial port, receives the state data of the brushless motor of each slave node concentrated by the main control layer, and sends an instruction to the main control layer at the same time. Not only are wireless multi-node synchronization and anti-interference problems solved, but also high-precision motor control is realized.

Provided in the present invention are a hybrid excited axial brushless motor and a power generation method thereof. The hybrid excited axial brushless motor comprises a housing and a rotating shaft rotatably fixed in the housing. Seven parts, i.e. a first exciter stator, a first magnetic shunt ring rotor, a first permanent magnet rotor, an armature stator, a second permanent magnet rotor, a second magnetic shunt ring rotor and a second exciter stator are successively mounted in the housing in the axial direction, air gaps being provided between every two adjacent parts. The first permanent magnet rotor and the second permanent magnet rotor are symmetrically arranged and are both rotatably fixed to the rotating shaft; the first magnetic shunt ring rotor and the second magnetic shunt ring rotor are symmetrically arranged and are both fixedly connected to the rotating shaft; the first exciter stator and the second exciter stator are symmetrically arranged and are both fixedly connected to the housing. By means of an armature stator support, the armature stator is fixedly connected to the housing. The present invention achieves brushless hybrid excitation, and increases the power density and the power generation capacity of motors.

The invention relates to the field of rotor anti-oxidation paint surface drying, in particular to a brushless motor production rotor anti-oxidation paint surface drying device which comprises a drying box, a chain conveyor and the like. A chain conveyor is arranged on the drying box; the drying box is provided with a mounting frame; the drying box is provided with a frame body, and a chain part of the chain conveyor penetrates through the mounting frame, the drying box and the frame body. Through the arrangement of the connecting plate, the electric clamping device, the first mounting plate, the second mounting plate, a first spring piece, a rotating shaft rod, a servo motor, conveying belts and a limiting piece, and through the mode that the two conveying belts on the upper portion and the corresponding conveying belt on the lower portion grind away paint attached to each other, the phenomenon that in the prior art, after clamping work of the clamping device is finished each time, paint on the conveying belts on the upper portion is scraped away is avoided; the problems that paint accumulated on the clamping device needs to be cleaned by manual shutdown in the prior art, the workload of workers is increased, and meanwhile the production efficiency of the rotor is seriously affected are solved.

The invention relates to the field of voltage data processing, in particular to a voltage data processing method and device for zero point detection and a direct current brushless motor. The method comprises the following steps: respectively monitoring and acquiring voltage values of U, V and W phases; if the voltage value of one preset period is accumulated in each phase, generating a first change diagram, and calculating a first deviation value according to the generated first change diagram; translating a curve graph in the first change graph to obtain a second change graph, and calculating a second deviation value according to the second change graph; obtaining a preset number of first change diagrams corresponding to the preset periods of which accumulation is completed, and calculating a third deviation value according to the obtained first change diagrams; obtaining a fourth deviation value according to the first deviation value, the second deviation value and the third deviation value; and in the next preset period of the preset period T, correcting the latest acquired voltage values of the three phases according to the fourth deviation value to obtain corrected voltage values of the three phases. According to the invention, the problem of insufficient accuracy of voltage data is solved.

The present disclosure provides a male sexual stimulation device. The male sexual stimulation device includes a shell, a brushless motor, a first micro control unit (MCU), a screw rod, a sliding block and a connector. The shell is provided with a first accommodating chamber. The brushless motor is arranged in the first accommodating chamber. The first MCU is arranged in the first accommodating chamber and is electrically connected to the brushless motor. The screw rod is connected to an output end of the brushless motor and rotates in a reciprocating manner under the driving of the brushless motor. The sliding block is in threaded connection to the screw rod and does a reciprocating motion under the driving of the screw rod. The connector is connected to the sliding block and moves in a reciprocating manner with the sliding block; and the connector is configured to connect a flexible sleeve.

According to the pure hardware PID current control system and method based on the direct current brushless motor provided by the invention, the negative voltage interference generated by electromagnetic induction is directly filtered in the bus current signal acquisition stage through the cooperation of the current sampling module and the bus negative voltage elimination module; the problem of signal distortion caused by negative voltage in a traditional sampling circuit is eliminated, and the current effective value detection precision is improved; the PID control module constructed based on pure hardware calculates a difference value between a target voltage and an actual voltage in real time through an analog circuit, and generates a proportional, integral and differential composite compensation signal, so that a PWM modulation circuit can adjust duty ratio output in real time according to the compensation signal, and it is ensured that a bus current of a motor driver is rapidly converged to a target value; the whole scheme does not need to depend on a microcontroller and a complex software algorithm, closed-loop current control is achieved through discrete devices, and the system cost is reduced.

The invention relates to the technical field of motor control, discloses a direct current brushless motor control method and system based on current prediction, and aims to solve the problems of large torque ripple, low efficiency and poor stability caused by current loop lag in the prior art. The method comprises the following steps: acquiring a motor operation state signal in real time; determining a sector and an electrical angular velocity based on the rotor position and the rotational speed; inputting related parameters into the mixed current prediction model to obtain a three-phase current prediction value of the next period; a prediction error is calculated in combination with a current instruction, and an optimal voltage vector enabling a cost function to be minimum is solved through a model prediction control algorithm; and finally, a space vector pulse width modulation signal is generated to drive an inverter. According to the method, advanced control is realized by fusing a physical model and a data-driven prediction mechanism, the torque ripple is remarkably reduced, and the energy efficiency and robustness are improved.

The invention discloses a self-adaptive brushless motor control method and system, and relates to the field of intelligent control, and the method comprises the steps: collecting the original data of the operation state of a motor through a sensor group, and carrying out the preprocessing; time-varying parameter identification is completed through combination of an extended Kalman filtering algorithm and a radial basis function neural network, an evaluation index system is constructed based on an analytic hierarchy process to obtain a comprehensive evaluation value, and a related trend is predicted through a long and short-term memory neural network; constructing a multi-modal control strategy library, determining an adaptive strategy, optimizing core parameters by using an improved particle swarm optimization algorithm, generating a control instruction, and outputting a corresponding current through a power driving module; and monitoring motor parameters in real time, comparing with a control target value, calculating deviation, correcting an identification result, adjusting a strategy threshold value, and updating and optimizing an objective function. The method has the advantages that by accurately sensing the state of the motor, dynamically adapting the control strategy and optimizing parameters in real time, it is ensured that the motor stably and efficiently operates under the complex working condition, and the characteristics of energy conservation and long service life are achieved.

The invention discloses a shaft hole matching structure of a brushless motor rotor. The shaft hole matching structure comprises a rotor main body, magnetic steel attached to the outside of the rotor main body, and a shaft body matched on the axis of the rotor main body, the rotor main body comprises a framework part for supporting magnetic steel and a shaft seat part for inserting a shaft body, the framework part is arranged in a hollow manner and is connected to the outer wall of the shaft seat part, and the shaft seat part defines a shaft tensioning structure and a rotor transmission structure on the two sides of the connecting part of the framework part; the shaft tensioning structure extends to the hollow inner side of the framework part, the shaft tensioning structure comprises a plurality of petal-shaped bodies which are arranged around the axis at intervals, the petal-shaped bodies elastically enclasp the shaft body and limit the radial movement of the rotor main body relative to the shaft body, and the radial movement and collision noise in the rotating process of the rotor are effectively eliminated.

The invention discloses a brushless motor stator press-fitting device and a press-fitting method. The press-fitting device comprises a press-fitting base, a positioning seat, a press-fitting guide mechanism, a positioning guide column, an elastic reset mechanism, a downward pressing guide mechanism, a downward pressing plate, a pressing head mechanism, a wire arrangement guide mechanism and an iron core gluing mechanism. According to the press-fitting method, the pressing head mechanism is used for pressing down the motor base, so that the motor base and the iron core stator are in interference insertion fit; a wire end of a wire on an iron core stator penetrates through the wire arranging guide mechanism, and when the wire arranging guide mechanism moves downwards, the wire end is driven to move downwards, so that the risk that the wire end is pressed, pulled or squeezed and clamped by mistake in the press fitting process is avoided; the iron core gluing mechanism is used for gluing the iron core stator through compression; according to the invention, the automation and assembly precision of the press-fitting process are improved, the phenomena of thread end damage, matching deviation and the like are effectively avoided, the reject ratio of products is reduced, and the overall assembly quality and production efficiency of the brushless motor are improved.

The invention provides an intelligent production line management and control method and system for an automobile brushless motor, and relates to the technical field of motor vehicles, and the method comprises the steps: carrying out the comprehensive defect detection, and obtaining motor defect distribution; process failure mode backtracking is carried out, and P production line devices of P production process nodes are positioned; cross-process parameter coupling analysis is carried out, and M groups of parallel monitoring devices are recombined; m edge detection nodes are configured, the M edge detection nodes are in communication connection with a production line management and control middle table through an Internet of Things gateway protocol, and M multi-modal monitoring tasks are set; after the calibration state is calibrated, the M edge detection nodes dispatch M multi-modal monitoring tasks through dynamic computing power distribution, and dynamic calibration triggering driven by deviation diagnosis is executed. The technical problem that in the prior art, production of motor vehicles such as electric vehicles generally depends on manual inspection and experience judgment to conduct equipment calibration, an automatic real-time monitoring and calibration mechanism is lacked, and therefore the product quality is affected is solved.

The invention relates to the technical field of bearing measurement, and discloses a multifunctional measuring instrument for comprehensive precision of a rolling bearing. The driving device is mounted on the working platform and comprises a load block capable of axially moving and a motor assembly for driving the load block to rotate; the measuring device comprises a high-precision inductance measuring head for detecting the runout of the bearing to be measured and a pressure sensor for monitoring an axial load; the fixing device is a replaceable mandrel base and is used for supporting an inner ring or an outer ring of the bearing to be detected; wherein the driving device applies an axial load to an inner ring or an outer ring of a to-be-measured bearing through the load block and drives the to-be-measured bearing to rotate, the measuring device synchronously collects bounce and load data of the to-be-measured bearing, the brushless motor and the load block are connected through the magnetic coupling, and the centering error of the mechanical coupling is eliminated. Meanwhile, motor vibration is prevented from being transmitted to the to-be-tested bearing, the pushing force air floating shaft sleeve actively counteracts the magnetic attraction force, and the stability of the load applied to the to-be-tested bearing is remarkably improved.

The utility model relates to the technical field of motors, in particular to a coreless motor with a split type Hall plate, which comprises a motor body and the split type Hall plate arranged in the motor body. The split type Hall plate comprises a winding leading-out PCB, a connecting support and a Hall plate, the winding leading-out PCB is fixedly connected in the motor body, the Hall plate is connected to the connecting support, and the connecting support is connected to the winding leading-out PCB. Compared with the prior art, the coreless motor with the split type Hall plate can effectively solve the problems that the Hall plate of the existing coreless brushless motor has a short circuit risk of scratching a coil lead in alignment and is inconvenient to maintain.

The invention relates to an internal rotation brushless motor for a treadmill, in particular to the technical field of motors for treadmills, a driving shaft is arranged at the center of a motor shell in a penetrating mode, the driving shaft is connected with the motor shell through a ball bearing, and rotor iron cores are arranged on the two sides of the middle of the driving shaft; the middle parts of the two groups of rotor cores are provided with permanent magnets, the inner wall of the motor shell is connected with a stator assembly, the back part of the stator assembly is provided with a tunnel reluctance element, the outer wall of one side of each rotor core is fixedly connected with a multi-pole magnetic coding ring, one side of the tunnel reluctance element is provided with a micro-electro-mechanical inertial measurement unit, and the outer wall of the rotor core is fixedly connected with a motor shell. The multi-pole magnetic coding ring fixed on the rotor side generates space magnetic field change, the tunnel magnetic resistance element array arranged in the circumferential direction captures magnetic field signals in real time, the Kalman filtering algorithm is fused with magnetic position signals, and detection errors caused by mechanical vibration are eliminated.

The invention relates to the technical field of brushless motor control systems, and discloses an intelligent redundant brushless motor Hall position correction system, which comprises a multi-sensor redundant layout module used for arranging multiple types of sensors, and each type of sensor provides rotor position information; and the data processing and fusion module is used for receiving and processing the data from the plurality of sensors, removing noise through filtering and denoising algorithms, and outputting an accurate rotor position estimation value. According to the invention, the problem of rotor position error caused by external interference is solved through multi-sensor redundancy layout and a Kalman filtering fusion algorithm; an intelligent fault detection and switching mechanism is introduced, and the fault tolerance capability and the emergency response capability are improved through a standby sensor selection algorithm; and real-time monitoring, remote diagnosis, fault early warning and parameter adjustment of the equipment are realized through cloud platform data transmission and remote monitoring technologies.

To provide a field position detection method for a motor which can be operated while surely detecting a field position of the motor during the operation even if a duty ratio of a drive voltage is changed when operating a three-phase brushless motor with 120° electrification, under PWM control and in a sensor-less drive manner.SOLUTION: In the case of operation while changing a duty ratio of a drive voltage to be applied to a three-phase coil via an inverter circuit 52, an MPU 51 selects a duty ratio optimal for sensing a non-electrified phase coil voltage at a predetermined drive voltage. In the case of driving with the optimal duty ratio in an electrification phase of one cycle, the drive voltage is applied in an on-duty phase of the optimal duty ratio. When applying a drive voltage based on a duty ratio exceeding the optimal duty ratio, the on-duty phase of one cycle is divided into a plurality of on-duty phases including the optimal duty ratio and the drive voltage is applied.SELECTED DRAWING: Figure 10

The invention provides a mobile robot and a robot system. The mobile robot comprises a mobile main body, two main wheel modules and an outer extension part, the two main wheel modules are arranged in a spaced mode in the first direction; the main wheel module comprises a first wheel frame, a driving wheel and a brushless motor; the first wheel frame is arranged on the moving main body, and the first wheel frame is provided with a first surface facing the other main wheel module; the driving wheel is rotatably arranged on the first wheel carrier; the brushless motor is arranged on the first surface and is used for driving the driving wheel; the outer extending part is arranged on the moving main body and can be switched between a folded state and an unfolded state; in the folding state, the outer extending part is arranged between the two brushless motors in the first direction, and at least part of the outer extending part sinks to the height position of the main wheel module in the height direction. By means of the design, a large space is reserved between the two main wheel modules to arrange the outer extending part, the space occupied by the outer extending part in the height direction is reduced, and meanwhile the distance between the two main wheel modules does not need to be increased.

The invention discloses a double-form switching electric skateboard, which comprises a chassis part, an electric skateboard body and an electric skateboard body, the control panel is arranged on the chassis part and hinged to the chassis part through a hinge; the bridge frame is hinged to the chassis part, and a driving unit is arranged on the bridge frame; wherein the driving unit comprises a brushless motor, a bevel gear set and a toothed power wheel, the brushless motor drives the bevel gear set to rotate, and the bevel gear set is connected with the toothed power wheel. The control panel is of a split type or integral type structure, the control panel is installed on the chassis part through a connecting pad, a steering sensor is arranged on the connecting pad, control boxes are arranged on the two sides of the chassis part, and the control boxes are used for receiving steering signals of the steering sensor and controlling the bridge frame to steer. And a hub assembly or a track assembly is arranged outside the toothed power wheel. Sharing of power gear teeth is achieved through the gear coupling mechanism, the driving form can be rapidly switched, and self-adaptive adjustment of the tensioning force of the crawler belt is ensured in combination with the automatic tensioning mechanism; and the practicability of the product and the user experience are improved.

The utility model provides a wet and dry brushless motor. The wet and dry brushless motor comprises an outer fan housing, an inner fan housing, a movable impeller, an oil seal, a casing, a support, a rotor assembly, a stator assembly and a positioning cover. The outer fan cover is located at one end of the machine shell, the inner fan cover is located on one side of the outer fan cover, the movable impeller is located in the inner fan cover and connected with a motor main shaft, the oil seal is located on one side of the rotor assembly, the stator assembly is located around the rotor assembly, the positioning cover is located on the other side of the machine shell, and the support is located in the machine shell and fixedly connected with the machine shell. According to the wet and dry dual-purpose brushless motor provided by the utility model, hot air in the motor and water vapor absorbed by the impeller are respectively discharged through the wet air channel and the dry air channel, dry hot air in the motor is absorbed out through negative pressure at the air port of the outer fan cover, and meanwhile, the air pressure in the motor is smaller than that in the shell, so that the motor can be conveniently cleaned. And the moisture is discharged out of the shell through the wet air duct, so that the moisture is not gathered in the shell, and the service life of the motor is prolonged.

The invention relates to the technical field of unmanned aerial vehicles, in particular to a hydrogen energy unmanned aerial vehicle and a control method thereof.According to the unmanned aerial vehicle, a hydrogen fuel cell serves as a power source, a hydrogen storage tank is arranged at the top of an inner cavity of an unmanned aerial vehicle body, the hydrogen fuel cell is arranged at the bottom of the inner cavity, and then long-time-efficiency driving of rotors is achieved; therefore, the unmanned aerial vehicle can meet the requirements of long-endurance and large-range task scenes, and a stable triangular supporting structure is formed through the unique layout of the three two-fork wing arms. Two brushless motors are installed at the tail end of each binary wing arm to form a power system with six rotors in total, the layout remarkably improves power redundancy, that is, when any rotor or even one rotor on a single binary wing arm breaks down, the other rotors can provide higher asymmetric torque compensation capacity, and by combining a specific control algorithm, the power redundancy can be greatly improved. The basic flight attitude and controllability of the unmanned aerial vehicle can be effectively maintained, and the flight safety and reliability are greatly improved.

The invention relates to the technical field of motors, in particular to a winding function enhanced wide-area high-efficiency permanent magnet brushless motor and a design method thereof.The winding function enhanced wide-area high-efficiency permanent magnet brushless motor comprises a stator, a rotor and a rotating shaft, the rotor and the rotating shaft are concentrically connected through a key, and the rotor is sleeved with the stator; the stator and the rotor are formed by laminating silicon steel sheets with the same thickness, and the rotating shaft is made of a non-magnetic material; a plurality of pairs of neodymium iron boron permanent magnets are uniformly and fixedly embedded on the rotor along the circumferential direction; an outer arc-shaped segmented magnetic barrier, an elliptical magnetic barrier and an inner arc-shaped segmented magnetic barrier are respectively arranged between two adjacent pairs of neodymium-iron-boron permanent magnets; the outer arc-shaped segmented magnetic barrier, the elliptical magnetic barrier and the inner arc-shaped segmented magnetic barrier are sequentially arranged from outside to inside; each pair of neodymium-iron-boron permanent magnets is composed of two rectangular neodymium-iron-boron permanent magnets, the two rectangular neodymium-iron-boron permanent magnets are arranged in a V shape, and the opening of the V shape faces the air gap. On the basis of a winding function enhancement principle, winding arrangement is determined, direct-axis inductance is improved, and therefore the speed regulation range is widened.

The invention relates to a carrier frequency control method and system based on a direct current brushless motor, and the method comprises the steps: receiving a starting signal, and obtaining an actual rotating speed value of the direct current brushless motor through a rotating speed sensor; presetting a rotating speed threshold value, comparing the actual rotating speed value with the preset rotating speed threshold value, and adjusting the carrier frequency to be a first frequency value or a second frequency value according to a comparison result; a rising hysteresis threshold value and a falling hysteresis threshold value are preset, and the carrier frequency is prevented from being switched back and forth between the first frequency value and the second frequency value; when the carrier frequency is a second frequency value, acquiring a temperature value of the motor driving chip, and when the temperature value is higher than a temperature early warning value, further dynamically adjusting the carrier frequency; and obtaining the current carrier frequency, and adjusting the cut-off frequency and the common-mode inductance parameter of the LC filter according to the current carrier frequency, thereby optimizing the electromagnetic compatibility. According to the invention, the carrier frequency is dynamically adjusted in a grading manner, thermal management and electromagnetic compatibility design are optimized, and the balance of efficiency, noise and reliability is realized.

The invention discloses an automatic assembly production line for a brushless motor, which is characterized in that a lower bearing assembly mechanism, a central shaft carrying mechanism, a central shaft assembly mechanism, a stator assembly turnover mechanism, an elastic gasket assembly mechanism, an upper bearing assembly mechanism, a gasket assembly mechanism, a shell assembly mechanism and a synchronous conveying mechanism are integrated on a rack; the motor assembling machine can realize automatic assembling operation of the motor, and has the characteristics of small occupied space, labor cost saving, high working efficiency and high automation degree.

The invention relates to the field of fault diagnosis, discloses a brushless motor controller fault diagnosis method and system, and is used for providing powerful guarantee for reliable operation of a brushless motor controller. The method includes the steps that three-phase current and bus voltage signals are collected in real time through current and voltage sensors, and a characteristic frequency interval is extracted; the method comprises the following steps: extracting topological invariants by adopting a fractional order derivative and a continuous coherence algorithm, describing mechanical damage characteristics, taking the topological invariants and the mechanical damage characteristics as inputs, simulating motor system dynamic behaviors by virtue of a quantum state evolution model, calculating phase space trajectory divergence, triggering a graded fault decision according to the divergence, and accurately distinguishing parametric, mechanical, winding and pre-out-of-step faults. And outputting the highest-level fault instruction according to the priority and executing protection during multi-fault concurrence. The method comprehensively and accurately extracts fault features, has a dynamic adaptive capability, can predict a fault trend and effectively process a multi-fault concurrency condition, provides a solid guarantee for reliable operation of a brushless motor controller, and is suitable for multiple fields.