2192results about "Electronic commutators" patented technology

A portable fan includes an airflow portion and a handheld portion. The airflow portion includes rotation air blades and a drive portion that is driveably connected to the rotation air blades. The drive portion is a three-phase motor that is configured to drive the rotation air blades to rotate to generate an airflow. The handheld portion is connected to the airflow portion. A power supply assembly is arranged inside the handheld portion; and the power supply assembly is electrically connected to and supply power to the three-phase motor.

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 control method and system of a permanent magnet direct current brushless slotless motor. The method comprises the following steps: performing temperature compensation and signal filtering on voltage data of a Hall sensor to obtain rotor position information and temperature characteristic data; performing magnetic field intensity dynamic compensation calculation according to the rotor position and the temperature data to obtain magnetic field intensity parameters; adjusting the amplitude and phase of the three-phase current according to the magnetic field intensity parameter, and generating a current control quantity; extracting and compensating a harmonic component to obtain a torque smooth control instruction; all losses are calculated and optimized, and efficiency optimization parameters are generated; and performing feature extraction and anomaly judgment on the operation parameters, and outputting a protection control strategy. Accurate detection of motor position signals, stable control of torque, optimal control of loss and real-time monitoring and protection of abnormal states are achieved under the high-temperature working condition, and therefore stable operation and the service life of the motor under the high-temperature environment are guaranteed.

The invention provides an intelligent whipping control and monitoring system for an eggbeater, and the system comprises a rotating speed sensor, a torque sensor and a temperature sensor which are respectively used for detecting the rotating speed of the eggbeater, the torque change in the stirring process and the temperature of a stirred material in real time, and transmitting a detection signal to a control host. The control host comprises a processor and a memory, and standard torque curve databases corresponding to different whipping types are stored in the memory. And the processor calculates an actual torque curve of the current whipping process according to the sensor signal, and compares the actual torque curve with a standard torque curve in real time. When it is detected that the actual torque curve deviates from the standard torque curve and exceeds a preset threshold value, the system automatically adjusts the output power of the eggbeater motor so as to optimize the beating effect. According to the egg beater, accurate control over the beating process can be achieved, the stability of food material beating is improved, manual operation errors are reduced, and the intelligent level of the egg beater is improved.

A system configuration significantly reduces the number of interconnections needed between an electromechanical actuator (EMA) and an EMA controller (EMAC) while maintaining redundancy and other safety aspects needed by the target application without adding second or third independent redundant position sensors to the EMA for use with backup channel of the controller. The system configuration extends the sensor architecture used by COM-COM controllers with an additional sensor channel used by a backup controller without the need for adding a separate physical position sensor for the backup controller, which saves implementation effort, space, and weight that would otherwise be needed for integration of additional redundant sensors into the EMA.

The embodiment of the invention provides a permanent magnet synchronous motor electrical eddy current sensor angle error compensation method, and belongs to the technical field of motor driving. The compensation method comprises the following steps: acquiring differential sine and cosine signals output by the eddy current sensor; calculating a direct-current bias error according to the differential sine and cosine signals so as to obtain differential sine and cosine signals after direct-current bias error compensation; calculating an amplitude asymmetric error compensation coefficient according to the extreme values of the differential sine and cosine signals after the DC bias error compensation so as to obtain the differential sine and cosine signals after the amplitude asymmetric error compensation; and calculating the position angle of the motor rotor according to the difference sine and cosine signals after the amplitude asymmetric error compensation, and compensating the position angle by using the second harmonic cosine wave component of the position angle to obtain the real position angle of the motor rotor after compensation. According to the method, only algebraic addition and subtraction and multiplication are used, the execution time of the system is saved, the operation efficiency is improved, and the requirement for obtaining the position angle in real time is met.

The invention provides a draught fan starting method and device, electronic equipment and a readable medium, the draught fan starting method and device are applied to motor control equipment, the motor control equipment is used for controlling a motor to provide power for starting of a draught fan, and the motor comprises at least one phase; periodically sampling the current of at least one phase to obtain a current sampling value of at least one phase; determining a zero crossing point of the current of the phase based on the current sampling value of the phase; based on the current sampling value of the at least one phase and the zero crossing point of the current of the at least one phase, determining the forward and reverse wind state of the motor; any phase is used as a target phase, and based on the zero crossing point of the current of the target phase, the number of target sampling times in the sampling process of the target phase is obtained; judging whether the motor meets a preset motor starting condition or not based on the target sampling times and the forward and reverse wind state; if the motor meets the motor starting condition, the motor is controlled to provide power for starting of the draught fan, the motor is controlled to be stably started based on the forward and reverse wind state of the motor, and hardware control cost does not need to be newly increased.

A stand-alone motor unit for use with a piece of power equipment includes a housing, an electric motor, a battery pack to provide power to the motor, a battery receptacle arranged on the housing and configured to receive the battery pack, and a control panel arranged on either the housing or the piece of power equipment. The control panel is operable to control operation of the electric motor.

The invention discloses a vehicle-mounted ceiling screen anti-pinch method and device, electronic equipment and a storage medium, and relates to the technical field of vehicles. The method comprises the steps that under the condition that it is determined that the vehicle-mounted ceiling screen is in a starting state, the included angle between the current starting position of the vehicle-mounted ceiling screen and a vehicle roof and the current working current value of a motor used for driving the vehicle-mounted ceiling screen to be started are determined; when it is determined that the degree of the included angle is larger than a first set degree and the current working current value is larger than a first set current threshold value, anti-pinch control operation is conducted on the vehicle-mounted ceiling screen; wherein the first set current threshold value is determined based on a target working current value of the motor after the vehicle-mounted ceiling screen is started for a target set duration. The vehicle-mounted ceiling screen can be accurately and effectively prevented from clamping foreign matters in the starting process, the riding safety of passengers is ensured, and the riding experience of the passengers is improved.

The invention relates to the technical field of motor control, in particular to a harmonic gear motor based on double encoders and a control method thereof, which comprises the following steps: processing linear Hall element signals output by a rotor shaft encoder, including high-frequency noise suppression, direct-current bias calibration, amplitude normalization and phase difference calibration, to obtain accurate orthogonal signals; a double-dq rotating coordinate system phase-locked loop algorithm is adopted, the calibrated orthogonal signals are processed, and the high-precision real-time angle of the motor rotor is obtained through calculation; based on a signal of an output shaft encoder, matching with a preset angle partition of the harmonic reducer, and identifying an absolute position sector where the current output shaft is located; the rotor angle and the sector angle of the output shaft are fused to generate a high-resolution absolute angle of the output shaft; and based on the fused angle information, a magnetic field orientation control algorithm is adopted to drive a motor, and closed-loop control is achieved.

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 invention discloses a motor position non-contact sensing system and a signal processing control method. The system comprises a three-dimensional magnet assembly, a magnetic signal acquisition module, a digital signal processing unit, a voltage conversion unit and a cooperative control module. The three-dimensional magnet assembly and the acquisition module are coaxially arranged, magnetic points are in spatial gradient layout, the acquisition module comprises a three-dimensional magnetic field detection unit, a real-time phase calibration unit is arranged in the processing unit, and the cooperative control module adjusts sampling parameters based on the rotating speed. The method comprises the steps of initialization, magnetic signal acquisition, operation processing and voltage conversion output. According to the scheme, the problem of magnetic field signal distortion of an existing system is solved, stable and accurate sensing of the motor position is achieved, and the multi-scene motor control requirement is met.

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 provides a motor control method and a vehicle, and relates to the technical field of motor control. According to the method, a current Hall signal of a Hall sensor is obtained, and whether the Hall sensor is in a fault state is determined; if the Hall sensor is not in the fault state, whether the motor is controlled to work based on the current Hall signal is determined according to first system time corresponding to the current Hall signal and the signal state of the current Hall signal; if the Hall sensor is in the fault state, updating the Hall signal invalid count value, and determining whether to control the control system of the motor to restart or not based on the updated Hall signal invalid count value and the first preset threshold value, thereby avoiding the problems of control errors and frequent error protection.

The present invention discloses a multi-pole and few-slot unitized permanent magnet hub motor and a coordinated control system and method. The motor is composed of N identical motor units uniformly distributed in the circumferential direction of a radial section, each 1 / N outer rotor is divided into M identical rotor segments along the axial direction, and the M rotor segments are rotated in sequence along the same rotation direction by a mechanical staggered angle arrangement; the constant torque area is divided into a first area and a second area, and the constant power area is divided into a third area to an eighth area. The control system includes two control modules, each of which is composed of a power electronic switch, a DSP controller and an inverter connected in series in sequence, the input ends of the two power electronic switches are respectively connected to the output ends of a battery, the output end of each inverter is respectively connected to N / 2 winding electronic switches, one winding electronic switch controls the on and off of a centralized winding in a motor unit, and the mutually independent winding electronic switches realize independent control of the motor unit, thereby improving the motor control freedom and operation efficiency.

The embodiment of the invention provides a chip, a motor driving system and an electric valve. The chip comprises a first substrate, a first peripheral device, a first wafer structure and a first packaging layer, wherein the first peripheral device is fixed on the first side of the first substrate; the first wafer structure at least has the function of one of the communication module, the signal processing module and the driving module; the first packaging layer is used for packaging the first peripheral device and the first wafer structure; a first peripheral device and a first wafer structure which at least has the function of one of a communication module, a signal processing module and a driving module are packaged together through a first packaging layer, so that the packaging cost of the chip is reduced, the cost and the size of the chip are further reduced, and the packaging efficiency of the chip is improved. And when the chip is specifically applied, the first wafer structure and the first peripheral device are applied as an integral product, so that the development difficulty of a developer in application of the chip is reduced, the development period is shortened, and the development input cost is reduced.

The invention discloses a permanent magnet synchronous motor sensorless control method based on a dynamic position error. A transition stage is provided, per-unit estimation position errors between a first position error signal obtained based on a high-frequency signal injection method and a second position error signal obtained based on a sliding mode observer are compared, an optimal switching speed point is dynamically determined, smooth fusion is carried out on the two position errors by using a nonlinear weighting function, and the optimal switching speed point is obtained. And finally, the estimated position and rotating speed are obtained through a phase-locked loop. And finally, position tracking is carried out by adopting different error signals according to the estimated rotating speed. According to the method, the problem of estimation value pulsation and jump caused by the fact that a traditional method depends on fixed experience switching points is solved, smooth and self-adaptive switching of the two estimation methods in the full-speed domain range is achieved, the control precision and operation stability of the system are remarkably improved, the structure is simple, and engineering implementation is easy.

The invention relates to an extended state type permanent magnet synchronous motor rotor position and speed estimation method. The invention relates to the technical field of motor control, and provides an extended state type counter electromotive force observer which takes alpha-beta axis current and alpha-beta axis total disturbance of a permanent magnet synchronous motor as system variables, alpha-beta axis actual current and action voltage as given values, and total disturbance of a system as observer output. And the back electromotive force of the permanent magnet synchronous motor is a main component for observing disturbance. The expansion state type phase-locked loop cancels a traditional PI regulator, the observed alpha-beta back electromotive force serves as phase-locked loop input, an observation angle error is obtained through calculation, and then the angle and speed of the motor are obtained and serve as output. In the angle compensation link, the phase difference between the observed counter electromotive force and the actual counter electromotive force is calculated according to the observer bandwidth and the motor rotating speed, a compensation angle is obtained through calculation, and accurate observation within the full-speed range is achieved.

A motor drive control device includes: a first input unit to which first current from the power source to the control unit is input; a first output unit that outputs the first current input from the first input unit to the control unit; a shutoff unit that is provided between the first input unit and the first output unit, and switches an output state of the first output unit; a second input unit to which second current from the control unit to the motor is input; a second output unit that outputs the second current input from the second input unit to the motor; and an arithmetic unit that is provided between the second input unit and the second output unit, and calculates a rotation speed of the motor.

The invention discloses a compensation method for an angle sensor of a permanent magnet synchronous motor, and the method comprises the steps: collecting an original output signal of the angle sensor, and carrying out the electrical angle compensation of the original output signal, and obtaining an electrical angle parameter compensation value; performing mechanical angle compensation on the original output signal to obtain a resolver zero deflection angle and a mechanical angle parameter compensation value; compensating an original output signal by using the electrical angle parameter compensation value, the resolver zero deflection angle and the mechanical angle parameter compensation value, and taking the compensated signal as an angle input signal for closed-loop control of the permanent magnet synchronous motor; the original output signals comprise two sinusoidal signals and two cosine signals. The signal error of the permanent magnet synchronous motor angle sensor can be corrected, and the control precision of the motor is improved.

The invention discloses a method for controlling a motor, a motor controller and a motor system. According to some embodiments, a motor controller for controlling a motor includes a position interface configured to receive a motor position signal indicative of a position of the motor and a pulse width modulation (PWM) unit configured to generate a PWM signal for driving the motor. The angle and speed unit is configured to determine a speed and a position of the motor based on transitions of the motor position signal, where transition intervals are defined between the transitions, determine a PWM count of periods of the PWM signal during a first one of the transition intervals, and determine a pulse width modulation (PWM) count of periods of the PWM signal during a second one of the transition intervals. And updating the position of the electric machine during a second one of the transition intervals based on the PWM count to generate an updated position. The controller is configured to transmit a control signal for controlling the motor to the PWM unit based on the speed and the updated position.

The invention provides a control method of a servo motor and an actuator. According to the control method, firstly, a servo motor is controlled to determine a first mechanical rotation amount according to a first current input logic, then the servo motor is controlled according to a second current input logic, so that a rotor moves towards a target phase searching direction, and a second mechanical rotation amount is determined; and finally, according to the first mechanical rotation amount, the second mechanical rotation amount and the theoretical mechanical rotation amount in the second current input logic, the phase-finding rotation deviation is determined, and the servo motor is controlled according to the phase-finding rotation deviation, so that the situation of galloping or stalling of the actuator caused by phase-finding failure due to hard limiting blocking of the actuator is avoided. Therefore, the control precision of the servo motor is improved, and the safe operation of the actuator is ensured.

Provided in the embodiments of the present application are a chip, an electric-motor driving system, and an electric valve. The chip comprises a first substrate, a first peripheral device and a first wafer structure, which is at least provided with one of a communication module, a signal processing module and a driving module, that are fixed to a first side of the first substrate, and a first encapsulation layer for encapsulating the first peripheral device and the first wafer structure. By means of encapsulating the first peripheral device and the first wafer structure, which is at least provided with one of the communication module, the signal processing module and the driving module, together by means of the first encapsulation layer, the cost of encapsulating the chip is reduced, and then the cost and volume of the chip are reduced; in addition, in the specific application of the chip, the first wafer structure and the first peripheral device are used as a whole product, so that the development difficulty of developers when using the chip is reduced, the development period is shortened, and thus the development investment cost is reduced.

The invention discloses a brushless motor starting method and device, and the method comprises the steps: controlling a power controller to drive a rotor of a brushless motor to rotate to a starting position in response to a received starting signal; controlling a power supply controller to drive a rotor of the brushless motor to rotate through an open-loop control strategy, and detecting a back electromotive force signal on a stator of the brushless motor through a back electromotive force sensor; and determining an estimated rotating speed and an estimated position of the brushless motor according to the back electromotive force signal through a closed-loop control strategy, and controlling a power supply controller to drive the rotating speed of a rotor of the brushless motor to reach a preset target rotating speed according to the estimated rotating speed and the estimated position. The precision of rotating speed control of the brushless motor under the low-rotating-speed working condition is guaranteed, the dependence on a high-precision position sensor is reduced, the system cost is reduced, the dynamic response performance is improved, the special requirement of the starting stage can be met, and efficient dynamic adjustment can be achieved in the operation stage.

A power system including a power converter system and an electric machine is provided. In one aspect, the power converter system has first and second switching elements. The electric machine includes a first multiphase winding electrically coupled with the first switching elements and a second multiphase winding electrically coupled with the second switching elements. The first and second multiphase windings are arranged and configured to operate electrically opposite in phase with respect to one another. One or more processors control the first switching elements to generate first pulse width modulated (PWM) signals based on received voltage commands to render a first common mode signal and also control the second switching elements to generate second PWM signals based on received voltage commands to render a second common mode signal. The rendered first and second common mode signals have the same or similar waveform with opposite polarity with respect to one another.

A power system including a power converter system and an electric machine is provided. In one aspect, the power converter system has first and second switching elements. The electric machine includes a first multiphase winding electrically coupled with the first switching elements and a second multiphase winding electrically coupled with the second switching elements. The first and second multiphase windings are arranged and configured to operate electrically opposite in phase with respect to one another. One or more processors control the first switching elements to generate first pulse width modulated (PWM) signals based on received voltage commands to render a first common mode signal and also control the second switching elements to generate second PWM signals based on received voltage commands to render a second common mode signal. The rendered first and second common mode signals have the same or similar waveform with opposite polarity with respect to one another.

The embodiment of the invention discloses a brushless direct current motor control system, and the system comprises a communication module which is used for receiving a control instruction; the detection module is used for collecting state information of the brushless direct current motor in real time; the control module is electrically connected with the communication module and the detection module and is used for executing a field-oriented control algorithm in a fixed-point operation mode based on the control instruction and the state information of the brushless direct current motor so as to generate a motor driving signal; and the driving module is connected with the control module and is used for receiving the motor driving signal and driving the brushless direct current motor to operate. According to the brushless direct current motor control system provided by the embodiment of the invention, hardware operation load is simplified through fixed-point operation, a low-cost embedded processor is adapted, and the problem that a field-oriented control algorithm on a low-cost hardware platform is difficult to consider both operation efficiency and control precision is solved.

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 relates to a method for estimating a rotation angle (φ). est ) of a rotor of an electric machine, in which a transverse voltage deviation (ΔU) is present in a model of the electric machine q ), which represents a difference between a measured transverse stress (U) q,real ) and one based on the estimated rotation angle (φ est ) calculated transverse stress (U q,expected ) is, is calculated and the calculated transverse stress deviation (ΔU) q ) into a tracking controller for estimating the rotation angle (φ) est ) is entered. Then, a value is entered into the electric machine model to calculate the calculated transverse voltage (U). q,expected ) used estimated flux (ψ) PM,est ) in the electric machine according to the transverse voltage deviation (ΔU) q ) adapted. The present invention also relates to a control unit and a vehicle.

An electric compressor includes a control unit configured to control drive of a motor. The control unit executes: synchronous deceleration control that is performed on conditions that a stop command for the motor has been inputted from the outside and that the number of rotations of a rotor is equal to or less than a predetermined first number of rotations and is greater than a predetermined second number of rotations, and decreases the number of rotations under forced synchronous control based on a current having a predetermined target current value; and stop control that is performed on condition that the number of rotations has reached the second number of rotations under the synchronous deceleration control, and stops rotation of the rotor under braking control that controls drive of predetermined switching element IGBTs of a plurality of switching elements in such a manner as to apply a load to the motor.