233results about "Current controllers" patented technology

A self-excitation motor disclosed by the present invention comprises a rotor, a first end of the rotor is equipped with a rectification circuit, the rotor comprises a rotor iron core and a plurality of harmonic windings and excitation windings, the rotor iron core is provided with rotor teeth, and each harmonic winding and each excitation winding are respectively wound on the corresponding rotor teeth. Each harmonic winding comprises a first harmonic winding and a second harmonic winding, the winding directions of the first harmonic winding and the second harmonic winding are the same, star connection is adopted, one ends of the first harmonic winding and the second harmonic winding are connected in series in a one-to-one mode, and the other ends of the first harmonic winding and the second harmonic winding are jointly connected to form a star neutral point; the other end of each second harmonic winding is connected with the midpoint of each bridge arm in the rectifying circuit in a one-to-one manner; the winding directions of the excitation windings on every two adjacent rotor teeth are opposite, and the two ends of each excitation winding are electrically connected with the direct current output end of the rectification circuit. This induces and rectifies the current for excitation more efficiently. The invention further provides a motor control strategy based on high-frequency harmonic current phase optimization.

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

The invention discloses a brushless motor control system and control method, and belongs to the technical field of motor control and driving. Comprising a real-time detection module, a control, regulation and control analysis module and a self-adaptive compensation module, multi-source operation data of the brushless motor are collected in real time, the control, regulation and control analysis module carries out depth correlation analysis, potential characteristics such as parameter sensitivity, observer coupling degree and stability attenuation index are mined, potential influences are quantified through analog simulation, and a comprehensive influence value is obtained. And the self-adaptive compensation module intelligently selects a compensation type according to the numerical value, calculates an accurate compensation data value, and performs dynamic closed-loop correction on controller parameters. According to the method, the problems of insufficient adaptive capacity and compensation lag caused by difficulty in coping with parameter time variation and potential coupling in the prior art are solved, the conversion from passive response to active prevention is realized, and the robustness, the control precision and the long-term operation stability under complex working conditions are improved.

The invention discloses an energy-saving operation control method and system for a permanent magnet direct current pump motor, and relates to the technical field of motor control, and the method comprises the steps: collecting a first drive current signal and a back electromotive force signal of the permanent magnet direct current pump motor; if a periodic peak and an electrical angle concentration phenomenon exist in the first driving current signal, performing quality evaluation on the back electromotive force signal to obtain back electromotive force credibility; if the back electromotive force credibility is greater than a preset credibility threshold value, applying operation parameter disturbance to the permanent magnet direct current pump motor; acquiring a second driving current signal of the permanent magnet direct current pump motor; performing disturbance response feature extraction on the permanent magnet direct current pump motor to obtain disturbance response features; identifying a disturbance source; and adjusting the operation strategy of the permanent magnet direct current pump motor to control the motor to operate. According to the method, the disturbance source can be recognized by combining the operation parameter disturbance and the disturbance response characteristics, the operation strategy is adjusted, motor operation control is achieved, and accuracy and reliability are improved.

A transfer system includes a drive unit that supplies drive currents to coils disposed along a transfer path, a thrust command generation unit that generates a thrust command that is the command value of a thrust to be produced by a mover, based on a motion target value that is a time-series motion target value, and a current command generation unit that generates, as current commands, current target values that are the target values of the drive currents to be provided to coils so that the thrust produced by the mover follows the thrust command. The current command generation unit generates the current target values to be provided to coils, using part of an actual thrust characteristic determined by the characteristics of the plurality of coils and the mover, so as to reduce the number of the coils through which the drive currents flow.

The present disclosure relates to a motor assembly, and more particularly, to a motor having a two-phase input power source and a power conversion device for driving a two-phase motor. The present disclosure relates to the motor assembly for driving the two-phase motor, the motor assembly configured to comprise: a motor including a first winding and a second winding having an electrically insulated parallel structure; a DC-link circuit for supplying a direct-current voltage; and an inverter connected to the DC-link circuit to convert the direct-current voltage into an alternating-current voltage to drive the motor, and including a first switching element set connected to the first winding and a second switching element set connected to the second winding.

The application discloses a high-precision model prediction current control system and control method of a double three-phase motor, and relates to the technical field of multiphase motor control. The application extends the traditional 12 virtual voltage vector control set, designs 24 virtual voltage vectors with equal amplitude and uniform phase angle under the premise of not losing voltage utilization rate, and improves control precision. A duty cycle calculation method based on minimum error is proposed, which can track the currents of d-axis and q-axis at the same time even in the case of a single effective virtual voltage vector, and guarantees optimal output duty cycle. In addition, the process of traversing all voltage vectors in the prediction control is simplified, and the calculation burden of the algorithm is reduced. The application improves the precision of model prediction control by extending the control set and reducing the calculation error of the duty cycle, reduces 5th and 7th harmonics, and improves torque ripple. Moreover, even under the action of 24 voltage vectors, the calculation amount is still low, and the execution efficiency of the algorithm is improved.

Disclosed are systems and methods for motor control using optimal efficiency reference generation. An electronic controller can determine current values of a motor in a rotating reference frame. Each current value can be associated with a dimension of a set of dimensions of the rotating reference frame. The electronic controller can further determine flux linkage values for each dimension of the set of dimensions of the rotating reference frame based on the current values using an optimization cost function that accounts for motor speed, copper loss, and core loss. The electronic controller can further determine target flux linkage values for each dimension of the set of dimensions of the rotating reference frame. The electronic controller can then control a power switch network coupled between a power source and the motor based on the flux linkage values and the target flux linkage values.

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

This invention discloses a torque-stable two-phase brushless DC motor and its control method. The two-phase brushless DC motor includes a stator and a rotor. The stator includes a stator core and 4*n stator windings surrounding the stator core. The rotor includes a rotor core and 6*n permanent magnet poles surrounding the rotor core, where n is a positive integer, and adjacent permanent magnet poles have opposite polarities. This invention features high stator winding utilization efficiency, reduces the weight of the brushless DC motor, and exhibits low torque ripple, making it suitable for applications requiring continuous power output.

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.

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 relates to a gantry double permanent magnet servo motor cross coupling sliding mode synchronous control method based on beam mover part information, and belongs to the technical field of electromechanical control. The method comprises the following steps: calculating a double-motor mover displacement tracking error, a cross coupling error and a cross coupling speed error; calculating a sliding mode surface and a sign function thereof; based on the relative displacement of the cross beam rotor, the dual-motor current is redistributed to compensate the deflection influence of the cross beam; the cross beam rotor q-axis net current, the synchronous displacement error and the speed error serve as input, and the sliding mode gain coefficient is dynamically adjusted through fuzzy reasoning; and finally, outputting the reconstructed q-axis current to realize closed-loop control. According to the method, current redistribution and sliding mode variable gain control are carried out by using part of information of the cross beam rotor, the adverse effects of the non-central position and acceleration motion of the cross beam rotor on the synchronization precision are effectively reduced, the synchronization precision and the response speed of the double-drive gantry platform during dynamic operation are remarkably improved, and the method has important engineering application value.

The invention discloses a novel electric compressor control circuit, which comprises an IGBT (Insulated Gate Bipolar Transistor), a driving circuit, a master control single chip microcomputer and an external safety circuit, the output ends of the IGBT and the driving circuit are connected with an OPAMP (Operational Amplification Multi-Point) operational amplifier module, and an amplified signal is sent to an ADC (Analog-to-Digital Converter) module of the master control single chip microcomputer for current closed-loop control of a permanent magnet synchronous motor on one hand; on the other hand, the current is sent to the COMP comparison module for detecting whether overcurrent occurs; when overcurrent occurs, an error signal generated by the COMP comparison module is sent to the Timer timer module, so that the PWM stops sending waves, and the IGBT is protected; and the external safety circuit is used for monitoring the execution of the ADC interrupt service function of the master control single chip microcomputer. According to the invention, the high and low levels of the IO port are overturned in the ADC interruption service function, and the half-wave rectification circuit is utilized to output the voltage to judge whether the single-chip microcomputer normally operates the motor control loop, so that the reliability of abnormal conditions is improved.

The application discloses a kind of robot joint adaptive super-spiral observation methods based on barrier function, belong to robot joint drive and motor non-inductive control technical field.This method faces the robot joint module using permanent magnet synchronous motor, constructs super-spiral observer, and designs the segmented adaptive gain law based on barrier function, on-line adjustment is carried out to observer parameter, so that position, speed estimation error can quickly converge to preset area in finite time, and disturbance upper limit does not need to be known in advance;Wherein, in the stage of greater error, observation gain is improved to speed up convergence speed, and gain is adaptively reduced after error enters boundary region to suppress chattering, so that rapidity and smoothness are considered.This method can reduce the dependence of robot joint module on position sensor, improve the compactness and reliability of module structure, reduce observation chattering, and improve the position and speed estimation accuracy under the condition of sudden load and parameter perturbation.

The invention discloses a high-precision telescopic thrust servo motor special for woodworking trimming and a control method of the high-precision telescopic thrust servo motor, and belongs to the technical field of servo motors. The motor comprises a casing, a brushless permanent magnet stator assembly, a rotor assembly, a specially-made lead screw nut with a spiral lubricating groove in the inner wall, and a push rod. Angular contact ball bearing supporting transmission parts are arranged at the two ends in the casing, and a fluororubber Y-shaped sealing ring and a transparent PC rear protective cover are embedded in the rear end of the casing. The device further comprises a high-precision incremental photoelectric encoder, a force sensor, a control module with a PID double-closed-loop control unit and a servo driver. The control method comprises the steps of power-on stroke detection, target current calculation, position boundary protection, PID double-closed-loop cooperative regulation and control, and real-time feedback of actual pressure and stroke percentage until the process is finished. The trimming displacement and thrust precision is improved, the service life of equipment is prolonged, the remodeling debugging difficulty is reduced, and the high-end trimming process requirement of woodworking is met.

Provided is a servo driver capable of coping with motors of various capacities. This servo driver includes: a supply unit that supplies a drive current to a motor; a detection unit that detects a current value of the drive current at a resolution corresponding to a clock frequency of a supplied clock signal; and a control unit that supplies the clock signal to the detection unit, the control unit being capable of changing the clock frequency.

A nonlinear and adaptive alternating-current servo electric motor angular position control method and system includes: acquiring original electric motor rotor angular position data; inputting the original electric motor rotor angular position data into a rotor angular position control module; performing second-order time differentiation on the electric motor rotor position data, so as to generate electric motor rotor angular acceleration data; inputting the electric motor rotor angular acceleration data and an output from the rotor angular position control module into an incremental inverse dynamic control module at the same time; and inputting the output from the incremental inverse dynamic control module into an electric motor current control module.

Disclosed are systems and methods for motor control using piecewise affine modelling. An electronic controller may determine current values for a motor in a rotational reference frame. Each current value may be associated with a dimension of a set of dimensions of the rotational reference frame. The electronic controller may further determine, based on the current values, a flux linkage value for each of the set of dimensions of the rotational reference frame using a piecewise affine map. The electronic controller may further determine a target flux linkage value for each of the set of dimensions of the rotational reference frame. The electronic controller may then control a power switching network coupled between a power supply and the motor based on the flux linkage values and the target flux linkage values.

Provided are an adaptive control method for a load of a motor and an outdoor working vehicle. According to the control method, by pre-storing a correspondence between an operating parameter and the load of the motor, a correspondence between the operating parameter and a performance parameter of the motor, and an upper boundary threshold and a lower boundary threshold corresponding to the load, and by comparing a matching situation between a real-time operating parameter and a load parameter, the performance parameter of the motor is adjusted through straight line fitting or curve fitting to adapt to the load. Adjusting the performance parameter of the motor includes increasing / decreasing a power of the motor, increasing / decreasing a rotating speed of the motor, increasing / decreasing a current of the motor, and increasing / decreasing a torque of the motor.

A motor control device includes: an inverter that supplies an alternating current to a motor mounted on a vehicle; a current detection unit that detects the alternating current; a position detection unit that detects a rotor phase angle of the motor; and an inverter control unit that controls the inverter based on a current value detected by the current detection unit and the rotor phase angle detected by the position detection unit, wherein the inverter control unit, in response to a timing at which vibration of the vehicle is generated, changes a current phase angle of the motor, and makes a cycle of a waveform of a resultant current of the alternating current irregular.

The present invention discloses a brushless motor and a positioning and steering control method thereof, and an aerial work vehicle. The brushless motor comprises a motor controller, a brushless motor body, a steering cylinder, a Hall sensor, a first micro limit switch and a second micro limit switch. The first and second micro limit switches are disposed at first and second stroke positions of a ball screw in the steering cylinder, respectively, and are both communicatively connected with the motor controller. Upon receiving the switch signals output by the first and second micro limit switches, the motor controller respectively controls the brushless motor body to stop driving the ball screw to move in a first direction or a second direction. The Hall sensor detects a revolution of the brushless motor body in real time, and sends the revolution to the motor controller. The motor controller also controls the brushless motor body to stop driving the ball screw to move in the first direction or second direction when the revolution reaches a first preset revolution or a second preset revolution, wherein the first preset revolution is determined according to the first stroke and a preset ball screw motion relationship, and the second preset revolution is determined according to the second stroke and the preset ball screw motion relationship.

A motor drive controller for driving a brushless direct current motor includes a motor drive unit; a magnetic sensor for detecting a magnetic field generated by rotation of the motor and outputting the magnetic field as each of magnetic signals; and a bias adjuster for adjusting and outputting a bias voltage used in magnetic field detection by the magnetic sensor. The bias adjuster adjusts the bias voltage to a second voltage value lower than a first voltage value that allows the magnetic sensor to detect the magnetic field in a first period after a phase change of the magnetic signals. The bias adjuster also adjusts the bias voltage to a first voltage value in a second period from an end of the first period until a subsequent phase change of the magnetic signals.

The application discloses a motor phase current lead angle control circuit, a direct current inner fan controller and an air conditioner. The motor phase current lead angle control circuit comprises a first resistor, a switching device, a second resistor and a third resistor. The first end of the first resistor is connected with a speed regulation signal input end. The first end of the switching device is connected with the second end of the first resistor, and the second end of the switching device is connected with the speed regulation signal input end. The first end of the second resistor is connected with the first end of the switching device and the second end of the first resistor, and the second end of the second resistor is grounded. The first end of the third resistor is connected with a lead angle signal input end and the third end of the switching device, and the second end of the third resistor is grounded. Thus, the switching state of the switching device can be controlled by changing the VSP input voltage, so that the LA input voltage V LA is changed, the motor is operated at different lead angles under different V sp , and the problem that the electromagnetic noise is large during the operation of the motor at a low speed stage is solved.

This invention provides a motor control method, a motor control device, a readable storage medium, and a motor. The motor control method includes: setting a set speed and a set direction of rotation for the motor; acquiring the rotor position, operating speed, and operating direction of the motor while it is running; acquiring a first input value for the set speed and a second input value for the operating speed based on the operating direction, operating speed, set speed, and set direction of rotation; acquiring a target current based on the first and second input values; acquiring the actual current of the motor; acquiring a first control value based on the target current and the actual current; acquiring the chopping direction and duty cycle of the three-phase inverter bridge based on the first control value; acquiring the energizing phase sequence of the three-phase inverter bridge based on the operating direction of rotation; and controlling the motor operation using the three-phase inverter bridge based on the chopping direction, duty cycle, rotor position, and energizing phase sequence.

The invention discloses a novel auxiliary control system of a gas water heater. The novel auxiliary control system comprises a direct current motor and an auxiliary control panel, the auxiliary control board comprises an AC-to-DC unit, a DC motor control unit and a protection switch signal output unit. The AC-to-DC unit is used for converting an input 220V AC power supply into DC and supplying the DC to the DC motor control unit; the direct current motor control unit is used for controlling rotation of the direct current motor and monitoring the running state of the direct current motor, and the MCU drives the direct current motor in a constant-current mode and conducts high-dynamic-response motor rotating speed closed-loop control. The auxiliary control system of the gas water heater is formed only by replacing an alternating-current motor with a direct-current fan, cancelling a wind pressure switch and assembling an auxiliary control panel under the condition that the whole structure and the main control system of the existing alternating-current gas water heater are not changed, so that the fault rate of the gas water heater is reduced, the performance is more stable, and energy is saved; and meanwhile, the wind pressure resistance of the fan is enhanced.

This invention discloses a predictive current control method and system for a GaN-based permanent magnet synchronous motor. The method includes: predicting the current of each voltage vector among multiple voltage vectors of the inverter based on a predictive current model to obtain multiple predicted currents; filtering the multiple voltage vectors according to the multiple predicted currents and a first cost function to obtain candidate voltage vectors; determining the duration of action of the candidate voltage vectors; if there are multiple candidate voltage vectors, filtering them according to the duration of action of the multiple candidate voltage vectors and a second cost function to obtain the optimal voltage vector; and controlling the inverter according to the optimal voltage vector and its duration to control the operation of the permanent magnet synchronous motor. This improves the overall steady-state performance of the motor while reducing the computational load, thus lowering the complexity of the control method.