982results about "Electronic commutators" patented technology

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 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 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.

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 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.

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.

The invention provides a bus magnetic encoder precision improving method, system and device and a storage medium, relates to the technical field of servo control, and is applied to a main control chip, and the main control chip is connected with a bus communication chip through a first communication interface and connected with a magnetic encoder chip through a second communication interface. The method comprises the following steps: receiving a position request protocol packet sent to a bus communication chip by a servo driver through a first communication interface; when the position request protocol packet meets the preset requirement, generating a synchronous trigger signal; according to the synchronous trigger signal, calculating a target time point when the second communication interface reads the position data of the magnetic encoder chip; when the time point is reached, reading position data of the magnetic encoder chip; and generating a response position protocol packet according to the position data, and sending the response position protocol packet to the servo driver. The method has the technical effects that the delay of receiving the position data by the servo driver is reduced, and the dynamic change of the delay is minimum.

A method for detecting movement of a vehicle body component moveable by an electric motor having a rotor and a three-phase stator, and a motor vehicle. The method includes: loading two stator phases with a pulse-width-modulated voltage and maintaining a third stator phase at a free-floating state; monitoring the third stator phase as a measuring point for an inductive voltage divider formed using the two stator phases; and detecting movement of the vehicle body component when an electric signal at a measuring point or a variable derived from the electric signal exceeds a specified threshold value. The motor vehicle includes a control device that is operable to perform the method.

The motor control device includes: a control signal generation unit 512, generating a motor control signal for supplying drive power to a drive motor 60; an advance angle value setting unit 514, setting a control advance angle value θa for advancing a phase of the motor control signal; and an operation state detection unit 513, detecting an operation state of the opening and closing body. The advance angle value setting unit 514 sets the control advance angle value θa in accordance with the operation state of the opening and closing body detected by the operation state detection unit 513.

Method for operating a circuit arrangement as part of a BEMF zero crossing identification operation, which serves as the basis for sensorless commutation of a brushless DC motor, wherein the circuit arrangement has at least one comparator and a microcontroller, wherein the comparator is designed to compare a phase voltage or terminal voltage of the brushless DC motor with a star point voltage (reconstructed via the terminal voltages or directly tapped off) of the brushless DC motor and to output a corresponding comparator signal to a signal path of the microcontroller, which signal path is connected to the comparator, wherein the signal path of the microcontroller and / or microcontroller pin, which signal path is connected to the comparator, is periodically switched over between an input mode and an output mode.

The invention provides an ultra-silence direct-current brushless outer rotor motor driving system and a design method. Aiming at the problems of large low-speed vibration, high-frequency howling, sudden load change, sharp noise increase and the like of a household motor, electromagnetic-structure-control triple collaborative optimization is provided: a harmonic-efficiency model is constructed in an electromagnetic side design, and a Halbach array and fractional slot winding design is combined, so that the proportion of a high-efficiency region is greater than or equal to 85%, and the force wave amplitude is reduced by 40%; a heat dissipation path is innovatively designed on the structure side through a thermal resistance equation, G1 is in dynamic balance (residual unbalance lt; 15 mg.mm / kg), the vibration acceleration is reduced to 0.3 m / s < 2 >; the control side HFI / SMO smooth switching (angle error lt; the dynamic PWM frequency modulation avoids the sensitive frequency band, and the load abrupt change responds to the lt; and 10ms. According to the invention, noise at 3000rpm is less than or equal to 32dB, and working condition fluctuation at 60 DEG C is achieved; the ultra-silence high-reliability motor is especially suitable for the requirements of household appliances such as a washing machine and the like on ultra-silence and high-reliability motors.

The invention discloses a brushless motor rotor angle determination method and device, equipment and a storage medium. The method comprises the following steps: synchronously acquiring original angle data of a Hall sensor, an incremental encoder and a back electromotive force observation module; respectively determining confidence coefficients of the Hall sensor, the incremental encoder and the back electromotive force observation module according to the rotating speed of the rotor, and performing weighted fusion on the original angle data of the Hall sensor, the incremental encoder and the back electromotive force observation module to obtain an initial fusion angle; based on the motor temperature, the motor phase current and the rotor speed, calculating a temperature drift compensation angle through a segmented temperature drift coupling model, and compensating the initial fusion angle according to the temperature drift compensation angle to obtain a temperature drift compensated angle; and inputting the temperature drift compensated angle into an extended Kalman filter for state estimation and filtering to obtain a rotor angle estimation value at the current moment. By means of the method, high-precision real-time calculation of the rotor angle within the wide temperature range and the full rotating speed range can be achieved.

An electrically powered aircraft is configured to reboot its motor(s) while in flight when the motor(s) are deenergized and / or stop spinning. A controller may receive one or more measurements associated with the motor, such as phase voltage measurements. The phase voltage measurements may be used to determine a position or angle of the motor, such as the position of the rotor of the motor to the stator of the motor. The phase voltage of the motor arises due to back-EMF from the spinning, but unpowered, motor. The motor position can then be used to by the controller to synchronize an inverter and provide synchronized command signals to the motor to restart the motor. If the motor is not spinning or not spinning fast enough to reliably determine its position, then an open-loop start may be used to spin up the motor prior to measuring the phase voltages for synchronization.

The invention discloses a permanent magnet motor initial position obtaining method and system, and relates to the technical field of permanent magnet motor control, and the method comprises the following steps: collecting a three-phase current of a permanent magnet motor in a state of injecting a high-frequency square wave voltage signal, converting the three-phase current through a CLARK coordinate conversion method, and extracting a high-frequency response current based on the difference of adjacent sampling points; outputting an envelope signal of the high-frequency response current according to the high-frequency square wave voltage signal and the high-frequency response current; processing the envelope signal through an LTI-EPLL differential equation, outputting an estimated position and an estimated amplitude of a high-frequency response current, and identifying NS polarity; according to the NS polarity discrimination result, the estimated position is corrected, and final rotor position information is output; according to the invention, through the high-frequency injection and LTI-EPLL method, the initial position identification precision and polarity discrimination of the permanent magnet motor are improved.

The invention relates to the field of magnetic suspension motor driving control, and discloses a high-reliability motor commutation method based on same-frequency displacement conversion of a magnetic suspension rotor, and the method comprises the following steps: collecting a multi-channel rotor displacement signal of a magnetic suspension bearing system; carrying out same-frequency positive-sequence component extraction and phase locking calculation to obtain a rotor space angle position estimation value; multiple paths of redundant rotor angular position signals are constructed, and main rotor space angular position signals are generated; executing initial alignment and error correction of a motor rotor angle, and locking an angle compensation value in a closed loop mode based on the waveform change rate of the direct current bus current at the pre-estimated commutation moment; synthesizing the motor commutation angle, and generating a pulse width modulation signal to drive the motor to operate. A magnetic suspension rotor displacement signal is processed through a second-order generalized integrator cascade instantaneous symmetric component method, so that the effect of high signal-to-noise ratio rotor position detection is realized by directly utilizing an existing magnetic bearing displacement sensor under the condition that a Hall element or a photoelectric encoder does not need to be additionally arranged.

Systems and methods provided herein relate to optimization of the motor of a pump system. Voltage-frequency ratios are adjusted while maintaining pumps speed in a systematic manner to lower power usage. Oscillations of the motor speed are detected, and voltage-frequency ratios adjusted to maintain low levels of oscillations while lowering power usage. Savings resulting in the optimization of the pump system are estimated.

The invention discloses a sensorless control method for an electrically excited synchronous motor based on a rotor switching signal, and relates to the technical field of motor control, the inherent high-frequency modulation switching signal of an EESM rotor circuit (in a buck converter form) is utilized, and an effective stage (AS) and an ineffective stage (IAS) are divided based on the unipolarity characteristic of a rotor modulation voltage; a stator current gradient is directly calculated at the AS to extract position information, a fundamental current component is estimated at the IAS to be used for compensation, magnetic coupling saturation compensation and rotor PWM frequency optimization are combined, and full-rotating-speed sensorless control is achieved.

The invention discloses an efficient brushless motor cogging tension compensation method, which comprises the following steps of S1, performing compensation initialization on a motor, and setting a target electrical angular velocity of the motor; s2, recording initial position information of the motor during rotation through an encoder for performing compensation process state judgment; s3, a PID controller is used for calculating a target voltage value needed for enabling the motor to rotate according to the target electrical angular speed, encoder data is used as an index, and the motor voltage needed for compensating the cogging tension in the lowest operation state of the motor is recorded and stored; according to the method, external equipment is not needed, data are obtained completely by means of a control system and an internal sensor of the motor, such as an encoder of the motor, and compensation is achieved through an optimized algorithm and control logic through a tooth groove tension calibration method. The whole compensation process can be completed in the motor control system, and expensive and complex external equipment does not need to be additionally added.

A method for rotor angle estimation for a 3-phase BLDC or stepper motor with a saliency ratio different from 1 includes receiving a requested duty cycle per motor phase from a motor control algorithm or deriving it from an output voltage per motor phase. The method involves providing a PWM pattern to each motor phase during operation, where the PWM pattern per motor phase matches the requested duty cycle or includes an equal fixed additional duty cycle. Current slopes in each motor phase are measured during active PWM pulses, and these measured current slopes or their average are compared to estimate the rotor angle.

The invention discloses a motor commutation method, a control processing unit and a motor driving circuit, and the motor commutation method comprises the steps: obtaining a bus voltage and a suspension phase voltage in a motor, and in a three-phase bridge inverter circuit, switching tubes electrically connected with the suspension phase are all turned off; determining whether a zero-crossing event occurs or not according to a first difference value between the suspension phase voltage and one half of the bus voltage; determining a first compensation amount according to a first duration of two adjacent commutation, the bus voltage and a first difference value when a zero-crossing event occurs; according to a second difference value between one half of the first duration and the first compensation amount, determining a commutation duration; and starting to delay the commutation duration from the moment when the zero-crossing event occurs, and controlling the commutation of the motor when the commutation duration ends. Accurate commutation can be realized, the operation efficiency of the motor is improved, and the operation out-of-step risk of the motor is reduced.

The invention discloses a whole vehicle electric drive resolver zero position identification and whole vehicle electric drive resolver zero position self-inspection method, and relates to the field of new energy electric drive control systems.The whole vehicle electric drive resolver zero position identification method comprises the steps that a direct-axis current instruction and a quadrature-axis current instruction are generated by receiving a torque instruction of a whole vehicle controller; sampling a motor phase current and performing coordinate transformation to obtain a feedback current; inputting the current instruction and the feedback current into a current regulator, and outputting direct-axis and quadrature-axis voltage components; injecting a high-frequency square-wave voltage signal into the direct-axis voltage component to generate a synthesized direct-axis voltage component, and performing PWM (Pulse-Width Modulation) to generate a driving signal; sampling the phase current again, extracting the high-frequency quadrature-axis response current, calculating the rotor position deviation, and inputting the rotor position deviation into the position observer to obtain the absolute position information of the rotor; wherein the PWM wave sending time sequence is aligned with the phase current sampling time sequence. According to the invention, the precision and efficiency of whole vehicle electric-drive rotary transformer zero position identification can be improved.

The application discloses a kind of accurate positioning method and device of robot joint, method includes: obtaining the first position signal of permanent magnet motor collected by resolver and the second position signal of permanent magnet motor collected by hall sensor, and first position signal and second position signal are respectively stored in the form of N-bit binary number;The low M bit of second position signal is used to the low M bit of first position signal is weighted replacement, obtain the motor weighted position signal after synthesis, in order to realize accurate positioning to robot joint, wherein, M < N.The application replaces the data of part of precision of resolver by part of high-precision data of hall sensor, obtains the motor weighted position signal after synthesis, to obtain accurate motor position signal, and then realize accurate positioning of robot joint.

The present invention provides a control system for a power generation system, comprising a generator coupled to a turbine via a shaft. The control system includes a memory storing instructions. The control system also includes a processor coupled to the memory and configured to execute the instructions. When the instructions are executed, the processor receives a direct current (DC) bus voltage from an automatic voltage regulator (AVR), wherein the AVR is configured to control the voltage characteristics of the generator and determine the speed of the generator based on the DC bus voltage.

The invention discloses a control method, a circuit and a driving mechanism of an underground three-phase brushless motor, and the control method achieves the high-adaptability control of an underground extreme working condition through fuzzy intelligent decision, directly generates a PWM duty ratio through the fuzzy reasoning taking the current deviation and change rate as the input, can rapidly inhibit the sudden change of a load, improves the response speed, and improves the reliability of the system. PID is combined with fuzzy control, so that a good control effect on nonlinearity, time-varying property and uncertainty of a controlled object can be achieved; in the driving mechanism, a driving combination composed of a three-phase brushless motor and a planetary gear reducer is connected with a transmission shaft through a flexible coupler, so that violent vibration impact of the driving mechanism in an oil well is reduced, the peak load of the driving mechanism is reduced, and the reliability of the driving mechanism is improved; and the wires are prevented from being broken in the assembly process.

Control device (3) for controlling an electric power steering device (4) which uses a three-phase synchronous motor (2) as a power assistance during a steering operation, comprising the following a rotation position estimation unit (16) that estimates a position of a rotor of the three-phase synchronous motor (2) on the basis of a neutral point potential or a potential of a virtual neutral point of the three-phase synchronous motor (2), and a command signal calculation unit (17) which calculates a command signal to the three-phase synchronous motor (2) on the basis of the position of the rotor which is estimated by the rotation position estimation unit (16), wherein a position signal, detected by a rotary position detector (21) which detects the position of the rotor of the three-phase synchronous motor (2), is input to the control device (3), the command signal calculation unit (17) calculates a command signal to the three-phase synchronous motor (2) either on the basis of the position of the rotor detected by the rotation position detector (21) or the position of the rotor estimated by the rotation position estimation unit (16) and The command signal calculation unit (17) then, when the position signal is abnormal, calculates the command signal to the three-phase synchronous motor (2) on the basis of the position of the rotor, which is estimated by the rotation position estimation unit (16), and wherein Then, when the position of the rotor detected by the rotary position detector (21) generally matches the position of the rotor estimated by the rotary position estimation unit (16), a calculation of the command signal to the three-phase synchronous motor (2) based on the position of the rotor detected by the rotary position detector (21) and a calculation of the command signal to the three-phase synchronous motor (2) based on the position of the rotor estimated by the rotary position estimation unit (16) are exchanged.

The invention relates to a drive control with a motor encoder (DSR) and a converter (CVT), wherein the motor encoder (DSR) is configured to determine raw measured values ​​(RSG) of an angular position (AGL) of a rotor shaft (DRS) of a drive (DRV). It is proposed that the motor encoder (DSR) has an integrated memory (MEM) in which correction parameters (CRP) for correcting the angular position (AGL) are stored, the drive control (DCR) has a processor (CPU), the memory (MEM) and the processor (CPU) together form a functional module (FMD), the functional module (FMD) being designed and prepared such that the processor (CPU) converts the raw measured values ​​(RSG) of the motor encoder (DSR) to corrected angular positions (AGL) using the correction parameters (CRP) and a correction function (CRF), and the drive control (DCR) controls the drive (DRV) on the basis of the corrected angular positions (AGL).