543results about "Electronic commutators" patented technology

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 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 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 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.

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.

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 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 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.

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).

Various methods, controllers, and motor systems are described that facilitate pulse control of a motor to increase the energy efficiency of the motor when conditions permit. Selected transitions between pulse output levels are controlled to provide a cubic or higher order transition torque profile. In various embodiments, a cubic, quintic, or higher order transition profile is used. Using such a transition torque profile can improve the NVH characteristics of the motor while providing energy saving pulse transitions.

To provide a motor control device which can accurately perform predetermined processing.SOLUTION: According to one embodiment, there is provided a motor control device comprising a sensor, a detection circuit and a controller. The sensor is placed at a position corresponding to the one between a winding in a first phase and a winding in a second phase in a motor. The motor comprises the winding in the first phase, the winding in the second phase and a winding in a third phase. The detection circuit detects timing in which a magnitude relation between induction voltage amplitude in the first phase and induction voltage amplitude in the second phase is exchanged. The controller performs predetermined processing for the motor on the basis of a signal of the sensor and a detection result of the detection circuit.SELECTED DRAWING: Figure 1

A method is provided for controlling a power tool that includes a motor having a rotor, a power switch circuit coupled to the motor, a trigger switch, and a controller configured to control a switching operation of the power switch circuit. The method includes providing drive signals for driving the power switch circuit by controlling a switching operation of the power switch circuit over a plurality of switching vectors, measuring a first current value of a single shunt element at a first time during a first vector and a second current value of the shunt element at a second time during a second vector, calculating phase currents of the motor based on the first and second current values, determining an angular position of the rotor based on the phase currents, and controlling a pulse-width modulation of the plurality of drive signals based on the angular position of the rotor.

The invention relates to a brushless motor drive circuit, in particular to a brushless motor control drive circuit with high withstand voltage isolation strength, which comprises a control circuit for receiving and processing voltage signals fed back by a sampling circuit and a detection circuit and outputting control signals to the drive circuit; the driving circuit outputs a driving signal under the action of the control signal so as to drive the brushless motor to commutate or start and stop; the sampling circuit detects a current signal when the driving circuit works, converts the current signal into a first voltage signal and sends the first voltage signal to the control circuit, so that the control circuit monitors the three-phase current of the brushless motor in real time; the detection circuit is used for detecting a Hall signal of the brushless motor with a Hall sensor, converting the phase change state of the brushless motor into a second voltage signal and sending the second voltage signal to the control circuit, so that the control circuit can detect the position of the rotor in real time; according to the technical scheme, the defects that in the prior art, environment adaptability is poor, and precise driving of the brushless motor is difficult to achieve can be overcome.

The invention discloses a rotor position detection method for multiplexing a synchronous motor body as a rotary transformer, and the method comprises the following core steps: a, independent detection windings (2) are embedded in grooves of a stator (3), the number of detection coils contained in each phase of independent detection winding (2) is equal to 1 / 2n of the number of rotor salient poles (4), and n is a natural number smaller than 10; b, detection coil parameters of all the independent detection windings (2) are completely consistent, the electrical phase difference between the independent detection windings (2) of each phase is equal to 360-degree electrical angle divided by the phase number of the independent detection windings, and the independent detection windings (2) are uniformly distributed on the inner circumference of a stator slot; c, the independent detection windings (2) of all phases are sequentially connected in series end to end and then connected into a carrier signal generated by a carrier generator, and the real-time angle position of the rotor salient pole (4) is calculated through a precise full-wave rectifier, a potential translation circuit and a position conversion module. A solid rotor position sensor is abandoned, a synchronous motor body is reused as a core component of a rotary transformer, and sensorless rotor position detection is achieved; the device adapts to special working conditions such as high temperature, strong electromagnetic interference and full sealing; according to the invention, excitation current interference is eliminated, the detection precision is improved, position closed-loop control in a zero-speed-full-speed range is realized, the response speed is high, the control precision is high, the production cost is low, and the synchronous motor is suitable for various synchronous motors with rotor magnetic resistance anisotropy and circumferential uniform distribution, such as a new energy automobile dragging motor, a linear motor and a household appliance totally-enclosed compressor.

A power converter is configured to measure an output current and to determine a multiphase voltage reference as a function of the output current. Within the same switching period the voltage reference is determined, a modulation routine determines a modulation index for each phase of the output voltage. In some instances, one or more phases must start modulation during the switching period before the new modulation index is determined. The modulation routine stores the value of the modulation index generated from the prior switching period and uses the stored value when a new value is not yet ready. An offset value for the phase voltage which used a modulation index from the prior switching period is determined in order to compensate the phase voltages of the other phases and to maintain a desired line-to-line voltage output from the power converter.

To reduce vibration caused by switching energization to a coil.SOLUTION: A drive control device 1 includes: a rotational speed calculation unit 42 that calculates a rotational speed of a motor 20 on the basis of a rotational position detection signal of the motor 20; an energization stop time calculation unit 43 that calculates an energization stop time for stopping energization to all phases of coils Lu, Lv, and Lw of the motor 20 on the basis of a target rotational speed Stg and the rotational speed of the motor 20; and an energization signal generation unit 44 that switches the energization to the coils Lu, Lv, and Lw of the motor 20, and generates an energization signal for controlling the energization of the coils Lu, Lv, and Lw of the motor 20 in order to stop the energization of all the coils Lu, Lv, and Lw of the motor 20 during the energization stop time.SELECTED DRAWING: Figure 1

A method of estimating motor speed includes: calculating a first estimate of rotor mechanical frequency of a motor based on measured time between successive counter pulses, each of the counter pulses corresponding to a fixed number of counts per revolution of the motor; calculating a second estimate of the rotor mechanical frequency based on the number of counter pulses over a fixed period of time; and dynamically revising an official estimate of the rotor mechanical frequency, by weighting the first and second estimates inversely proportional to one another based on the rotor mechanical frequency. A corresponding motor control system is also described.

The invention discloses an intelligent control system and method for a permanent magnet synchronous brushless motor, and the method comprises the steps: measuring a rotation position signal of a secondary magnetic wheel of a motor rotor through a high-resolution position sensor, and measuring a rotation position signal of a main magnetic wheel of the motor rotor through a low-resolution sensor; detecting whether the position signal increment synchronization between the rotation position signal of the secondary magnetic wheel of the motor rotor and the rotation position signal of the main magnetic wheel of the motor rotor is completed within a set time or not; when the rotation position signal of the secondary magnetic wheel of the motor rotor and the rotation position signal of the main magnetic wheel of the motor rotor complete position signal increment synchronization within a set time, the motor enters a closed-loop control operation mode; the actual rotation position of the motor is determined according to the initial position of the motor and the rotation position signals of the motor rotor secondary magnetic wheel and the motor rotor main magnetic wheel, and the actual rotation position of the motor is adjusted according to the difference value between the actual rotation position of the motor and the target rotation position of the motor to reach the target rotation position of the motor.

The invention provides a motor control method and system based on parameter identification, a vehicle-mounted refrigerator and a computer program product. The method comprises the following steps of: injecting a high-frequency sinusoidal voltage signal into an output end of a current loop when a motor runs, and identifying a current motor parameter; and controlling the motor based on the current motor parameter. Therefore, the technical problem that vibration and noise are introduced into a system while high-precision motor parameter identification is achieved through high-frequency sinusoidal voltage signal injection is solved; the current changed actual value of the motor parameter is correctly and accurately identified / recognized to accurately calculate and control the motor, so that the conditions of low efficiency and shutdown caused by misalignment of control due to deviation between the controller and the actual value when the controller is controlled based on the preset value of the motor are effectively avoided; the operation reliability and stability of equipment such as the compressor can be improved under extreme working conditions, and the user experience is improved.

Electric motors and methods of controlling electric motors are described herein. The electric motors include a mobile component having at least one permanent magnet coupled thereto and a stator spaced apart from the mobile component. The stator includes at least one stator pole having a ferromagnetic core and a coil wrapped around the ferromagnetic core. The ferromagnetic core is naturally attracted to the at least one permanent magnet. The motors also include a magnetic position control system configured to monitor a position of the at least one permanent magnet relative to the stator and controllably deliver an electric pulse to the coil of each stator pole to generate a repulsive magnetic flux on the ferromagnetic core to cancel an attraction force between the ferromagnetic core and the at least one permanent magnet to control movement of the mobile component.

The invention provides a motor control method and system based on a fan impeller fluid kinetic model, relates to the technical field of motor control, and aims to simulate airflow states of breathing machine turbine information, analyze index states of efficiency, noise and response data according to each kind of airflow state simulation data, and obtain a motor control result. Performing index collaborative analysis on the index state analysis data, performing index control instruction triggering according to the index comprehensive coefficient, and constructing a linkage adjustment database; collaborative weight coefficients of the three collaborative comprehensive coefficients are obtained and compared with the index comprehensive coefficient, a positive collaborative weight coefficient and a negative collaborative weight coefficient are obtained, then an influence collaborative coefficient is obtained, and an influence system adjusting instruction is triggered; actual data analysis and control operation influencing a system adjusting instruction are carried out on the breathing machine turbine airflow demand data, motor control data are obtained, and the motor control precision and intellectualization are improved.

To provide a controller for a rotary electric machine and an electric power steering apparatus which can suppress the error increase of the rotational angle due to the high frequency noise component included in the current detection value, while reducing the AC component error included in the sensor detection value of rotational angle, at high rotational speed. A controller for a rotary electric machine estimates an estimation actual angle deviation; calculates a detection angle deviation; calculates a control angle deviation by dividing internally between the estimation actual angle deviation and the detection angle deviation; calculates a rotational angle for control by performing feedback control so that the control angle deviation approaches 0; and makes the ratio of the estimation actual angle deviation higher than the ratio of the detection angle deviation, when the rotational speed is higher than a speed threshold value.