345results about "AC motor accelaration/decelaration control" patented technology

A motor control apparatus includes: a motor configured to drive a load; and a control unit configured to control the motor. The control unit is configured to, when activating the motor, determine whether a predetermined condition for determining that fluctuation in magnitude of the load occurs is satisfied, activate the motor in a first mode when the predetermined condition is satisfied, and activate the motor in a second mode when the predetermined condition is not satisfied, and the first mode is a mode in which an increase in rotation speed of the motor is gentler than an increase in rotation speed of the motor in the second mode.

The invention discloses a feedforward torque compensation control method and system for a photoelectric pod. The method belongs to the technical field of photoelectric pod real-time control. The technical problem that the requirement for high dynamic performance of the photoelectric pod is difficult to meet in photoelectric pod control is solved. The method comprises the following steps: sensor arrangement: arranging accelerometers at each motion axis of the photoelectric pod; signal acquisition and calculation: calculating the angular acceleration of each motion axis through acceleration data output by an accelerometer; calculating the disturbance torque: calculating the disturbance torque of each motion axis through the angular acceleration of each motion axis; calculating a current value of a feed-forward path: calculating a current value required by a motor of each motion shaft to resist the disturbance torque through the disturbance torque of each motion shaft; feed-forward path current and feedback path integration: injecting the current value as a feed-forward signal into a current loop given link in the servo control system, and resisting disturbance of each motion axis by controlling motor current of each motion axis.

A controller 1 is provided with: a motor controller (10, 11, etc.) that supplies a drive current to a motor 3, which is a power source of a processing device so as to place the motor 3 in a normal operating state, and, in response to multiplexed commands (S1, S2) that are sent from outside and relate to a safety function operation of the processing device, controls the drive current so as to place the motor 3 and the processing device in a safety stop state; and a command monitoring unit 16 that monitors whether or not the commands (High / Low of S1, S2) match each other. If a period during which the commands do not match exceeds an allowable value, the command monitoring unit 16 generates a safety stop signal Sd (High) for safely stopping the motor 3, and continuously sends the safety stop signal Sd (High) to the motor controller. This configuration makes it possible to facilitate construction of a safety system that uses the controller.

The invention provides a control method and system for a continuous mixer model pre-control algorithm, and the method comprises the steps: obtaining the variables of near-infrared numerical filtering through learning equipment operation condition information in advance, collecting the data of time, servo motor rotation speed and near-infrared filtering numerical values under different mixing degrees, and feeding back the information to a processor, the controller establishes a time-mixing uniformity data model and a time-speed data model according to the learned working condition information, processes the two models and then establishes a time-mixing uniformity-speed digital model; and according to the established digital model and the mixing uniformity controller for near-infrared measurement, the rotating speed is calculated and is transmitted to the servo driver to change the running speed of the motor, so that the purpose of effective control is achieved. The method has the beneficial effects that the hysteresis, the delay and the volatility of the PID algorithm in the prior art are solved. And the accuracy, the stability and the reliability of the existing equipment are greatly improved. The service life of equipment is ensured, and the power consumption is reduced.

The invention discloses an electric cylinder running speed control method and device based on trajectory planning and a storage medium, and belongs to the technical field of electric cylinders, the method comprises the steps that an initial speed curve of an electric cylinder is obtained, and the initial speed curve comprises a constant speed stage, an elastic stage and a determination stage; the elastic stage comprises a uniform acceleration stage and a uniform deceleration stage; the determination stage comprises an acceleration acceleration stage, an acceleration reduction stage, an acceleration and deceleration stage and a deceleration and deceleration stage; according to the initial working state and the expected working state of the electric cylinder, the assumed operation time of each section in the initial speed curve is obtained; whether an elastic stage and a constant speed stage exist or not is judged, so that a target speed curve and target running time of all the stages in the target speed curve are determined; and based on the target operation time of each section, the target speed curve of the electric cylinder is converted into a rotating speed control signal of a driving motor of the electric cylinder, and control over the electric cylinder is achieved. The method can avoid sudden change of the loading force of the electric cylinder, effectively reduces system vibration, and improves the position control precision of the electric cylinder.

The purpose of the present invention concerns a control command for a machine tool, and is to make it possible to adopt a high-frequency repetitive oscillation command, without restrictions on communication capacity, when acquiring a control command created by superimposing a command with repeatability on a normal move command such as a move command having no repeatability. The purpose can be achieved by: acquiring, from an higher-order control device, only information about the form of a command, and parameter information on numerical information relating to an amplitude, a period, and other feature amount; creating a repetitive movement command that is a command with repeatability only from the parameter information; and superimposing the repetitive movement command on a normal move command such as a move command having no repeatability.

The invention relates to a motor motion control method, a motor motion controller and a storage medium. The method comprises the following steps: acquiring a selected target working mode; the target working mode comprises a speed mode or a displacement mode; acquiring a selected target speed regulation rule; the target speed regulation rule comprises a trapezoidal speed regulation rule and an S-shaped speed regulation rule; acquiring a motion parameter value of the motor; the motion parameter values comprise an initial speed, an acceleration parameter value, a target speed, a deceleration parameter value and a stop speed; and performing motion control on the motor based on the target speed regulation rule and the motion parameter value in the target working mode. By adopting the method, the configuration parameters are simple, the speed regulation algorithm is selectable, and various application scenes can be met.

An electric working machine includes an electric motor to use electric power received from a battery via an inverter to drive a hydraulic pump to deliver hydraulic fluid to actuate a hydraulic device. A controller to control driving of the inverter and the electric motor is configured or programmed to gradually increase a rotation speed of the electric motor such that the rotation speed of the electric motor reaches a target rotation speed in a longer time when the electric motor is started in a state in which a temperature of hydraulic fluid detected by a fluid temperature detector is lower than or equal to a predetermined temperature than when the electric motor is started in a state in which the temperature of hydraulic fluid is higher than the predetermined temperature.

A patient transport apparatus for transporting a patient over a floor surface is described herein. The patient transport apparatus includes a throttle assembly, an auxiliary wheel assembly including an auxiliary wheel, an auxiliary wheel drive system, and a control system for operating the auxiliary wheel drive system based on user commands received from the throttle assembly. The control system includes a controller configured to detect a position of the throttle assembly, determine a desired rotational speed value associated with a current operating throttle position, determine a current rotational speed of the auxiliary wheel, select an acceleration rate based on the current rotational speed of the auxiliary wheel, generate an output signal based on the selected acceleration rate, and transmit the generated output signal to the motor control circuit to operate the motor to rotate the auxiliary wheel at the selected acceleration rate.

The invention discloses a current rotating speed mapping control method of a liquid cooling system, and relates to the technical field of liquid cooling systems, and the control method comprises the steps: constructing a double-domain model of a motor domain and a thermal load domain, carrying out the online identification of a liquid path impedance parameter in an operation process, and obtaining a current rotating speed mapping model; a target rotating speed instruction is generated in combination with a current-rotating speed mapping reference result and a thermal load flow estimation result, self-adaptive pump speed control is achieved through weight adjustment and smooth constraint driven by residual errors, and meanwhile baseline mapping and a pump family curve are dynamically updated through a memory buffering and batch reestimation mechanism; according to the invention, the self-adaptive capability and the cooling control stability of the liquid cooling system under complex working conditions are obviously improved, and the contradiction between insufficient cooling and energy consumption increase is effectively avoided.

The proposed solution relates to a drive device (1A, 1B), in particular for a vehicle seat (2), having a brushless DC motor, BLDC motor (10A, 10B), and a control unit (11A, 11B), wherein the control unit (11A, 11B) is configured: in a normal operating mode of the control unit (11A, 11B), by means of communication with a communication node (30, 11B) via an interface (110) of the control unit (11A, 11B), to receive control commands (410) and to control the BLDC motor (10A, 10B) on the basis of the received control commands (410); to recognize a disturbance of the communication with the communication node (30, 11B) via the interface (110) and / or a predefined input, and to switch to a maintenance mode in reaction to the recognized disturbance and / or the predefined input; and in the maintenance mode, to control the BLDC motor (10A, 10B) independently of communication with the communication node (30, 11B).

The invention discloses an intelligent low-voltage servo system based on three-ring control, and relates to the technical field of servo control, and the system comprises a double-shaft servo driver, an azimuth servo motor, a pitching servo motor, an azimuth angle sensor and a pitching angle sensor. The double-shaft servo driver comprises a control board assembly and a driving board assembly. The control panel assembly comprises a position loop controller, a speed loop controller and a current loop controller, and a three-ring cascaded closed-loop control structure is formed based on the position loop controller, the speed loop controller and the current loop controller; and the driving board assembly comprises a power amplification circuit and is used for driving an azimuth servo motor or a pitching servo motor to operate according to the pulse width modulation signal output by the current loop controller. According to the invention, a three-loop control structure of a position loop, a speed loop and a current loop is adopted, and feedforward compensation, disturbance observation and an intelligent management strategy are integrated to improve the dynamic performance and robustness of the system.

A power tool includes a trigger module, a motor unit, and a controller electrically connected to the trigger module and the motor unit. The controller stores parameter data that define a common control curve that represents a corresponding relationship between a reference pressed depth and a reference rotation speed. The controller obtains a pressing value from the trigger module, and outputs a control signal at least based on the common control curve and the pressing value to the motor unit. The common control curve has a low-speed curve segment and a high-speed curve segment. In a low speed mode, the controller outputs the control signal based on the low-speed curve segment. In a high speed mode, the controller outputs the control signal based on a high-speed control curve composed at least of the low-speed curve segment and the high-speed curve segment.

The invention discloses a remote control car motor rotating speed intelligent control method and system based on an efficient response driving algorithm, and the method comprises the steps: employing a multi-objective optimization algorithm, analyzing the road condition, the car speed and environment data in real time, optimizing the operation state of a motor, and balancing the rotating speed precision, the response time and the energy consumption; a reinforcement learning algorithm is combined, and a control strategy is dynamically adjusted according to real-time feedback; the vehicle state is evaluated through a vehicle-mounted sensor, and the motor rotating speed and power output are automatically adjusted; in the low-power-consumption mode, the battery efficiency is automatically optimized, and energy recovery is carried out during braking; the system has sensor fault detection and automatic switching functions, predicts future road conditions in combination with machine learning, and optimizes a driving strategy; according to the remote control car motor rotating speed intelligent control method and system based on the efficient response driving algorithm, quick response is achieved under operation in different environments, accurate rotating speed control is provided, energy consumption is reduced through the intelligent algorithm, and the cruising ability is improved.

One aspect of the present disclosure provides an electric work machine including a brushless motor, a drive circuit, and a control circuit. The control circuit executes a driving operation, a braking operation, and a switching operation. In the driving operation, the brushless motor is rotated based on a back-EMF of the brushless motor. In the braking operation, a switch pair of six switches in the drive circuit is turned on, and the other four switches are turned off. The switching operation is performed during the braking operation. The switching operation includes switching the switch pair. In the switching operation, an off-target switch is turned off based on an electric current flowing through the off-target switch satisfying an off-requirement.

A motor control system for use in an electric vehicle includes an accelerator lever operable by a user, a controller configured or programmed to control an electric motor to generate a drive power to drive the electric vehicle, wherein a rotation speed of the electric motor is increased in response to an increase in a first rotation angle in a first rotation direction of the accelerator lever from a reference position of the accelerator lever, and a first torsion spring including a coil portion inside of which a rotation shaft of the accelerator lever extends to apply a first elastic force in a second rotation direction opposite to the first rotation direction. The controller is configured or programmed to perform a control to stop the electric motor upon detecting that the first rotation angle is equal to or greater than a first predetermined rotation angle.

The invention relates to a refrigeration stirring mechanism, an operation method and system thereof and a storage medium, and relates to the technical field of refrigeration, and the method comprises the steps that in response to mode selection operation of the refrigeration stirring mechanism, the operation mode and manufacturing completion conditions of the refrigeration stirring mechanism are determined; a motor rotation scheme of the refrigeration stirring mechanism is set according to the operation mode, the motor rotation scheme comprises the motor rotation speed, the forward rotation duration and the reverse rotation duration, and the ratio of the reverse rotation duration to the forward rotation duration is located in a preset interval; determining a set temperature of the refrigeration stirring mechanism from the operation mode; a stirring motor in the refrigeration stirring mechanism is controlled to operate according to the motor rotation scheme, an evaporator in the refrigeration stirring mechanism is controlled to operate according to the set temperature, and each rotation of the stirring motor at least comprises one-time forward rotation and one-time reverse rotation; a fabrication completion signal is generated in response to the fabrication completion condition being satisfied. The refrigeration stirring mechanism has the effects that stirring is more sufficient, and the refrigeration efficiency is improved.

The invention relates to the technical field of electronics, in particular to a motor driving method, a chip, electronic equipment and a storage medium. The embodiment of the invention provides a motor driving method, a chip, electronic equipment and a storage medium. The current measurement resistance of a motor at the current temperature and the current standard resonant frequency of the motor at the current temperature and the standard working voltage of the motor are obtained; according to an acceleration frequency response curve of the motor and the current standard resonant frequency, obtaining a relation curve of an acceleration compensation coefficient and a working frequency of the motor at the current temperature; obtaining the temperature compensation gain of the motor at the current temperature according to the relation curve of the acceleration compensation coefficient and the working frequency and the current measurement resistance; through the mode, the acceleration amplitudes of the driving motor at different temperatures are more consistent, the vibration consistency at different temperatures is realized, and the consistency of the touch experience of a user is ensured.

A new method and circuit arrangement for operating an electric motor, such as a stepper motor, in a control loop for preventing motor stall, the electric motor comprising at least a first motor coil and a second motor coil, the method comprising: operating the electric motor at a velocity equal to the target velocity; receiving a load value associated with an electric motor load; and determining whether the load value is greater than a load value threshold. Based on a determination that the load value is greater than the load value threshold decreasing the velocity of the electric motor to a velocity less than the target velocity.

The present invention provides an intelligent package-handling system for large-scale packaging production lines. The system comprises a first detection unit connected to a control unit for detecting the position information of a first item; a second detection unit connected to the control unit for detecting the position information of a second item; a control unit connected to a drive adjustment unit for generating a control instruction based on the received first and second item position information and transmitting the control instruction to the drive adjustment unit; a drive adjustment unit connected to a drive unit for adjusting and controlling the drive unit according to the instruction of the control unit; and a drive unit configured to drive a transmission system connected to the first item and adjust the transmission speed of the transmission system according to the control information from the drive adjustment unit. The present invention has the advantages of preventing package overlap, increasing the success rate of package handover, and saving time and effort.

The invention discloses an acceleration and deceleration control method for a servo motor of a press machine, and relates to the technical field of servo motor control, and the method comprises the following steps: obtaining a historical acceleration and deceleration control scheme of the servo motor of the press machine in a historical work period; performing corresponding correlation coefficient analysis on the influence factors after the implementation of the sub-control factor set in the historical pressure acceleration and deceleration control scheme and the control factor set for each historical acceleration and deceleration control scheme to obtain a preprocessing coefficient set; acquiring a current acceleration and deceleration control scheme implemented by the press machine in the current working period, and counting correlation coefficients among influence factors generated by the current acceleration and deceleration control scheme according to the preprocessing coefficient set to obtain a target preprocessing coefficient set; the effect is that the acceleration and deceleration control of the servo motor is more adaptive to the production requirements of the press.

The present invention discloses a motor control method, device, equipment and computer-readable storage medium, the method comprising: sampling a target acceleration waveform to obtain first acceleration data; calculating first drive voltage data according to the first acceleration data; adjusting the first drive voltage data according to the output voltage peak value of the hardware drive circuit of the motor to obtain second drive voltage data, and driving the motor to vibrate based on the second drive voltage data, wherein the absolute value of the voltage value in the second drive voltage data is not greater than the output voltage peak value. The present invention can avoid the large difference between the actual vibration waveform and the expected vibration waveform caused by the drive voltage required for the acceleration waveform exceeding the output voltage peak value of the hardware drive circuit, thereby ensuring that the actual vibration effect of the motor is less different from the expected vibration effect when the drive voltage required for the acceleration waveform exceeds the output voltage peak value of the hardware drive circuit.

A rapid detection and automatic release control system for cloth twining on a roller and a dyeing machine thereof relate to the technical field of dyeing machines, overcome the defects that a traditional dyeing machine lifting system is controlled by a frequency converter, and comprise a lifting roller, a servo motor and a servo driver, the servo motor is a non-band-type brake servo motor and is in transmission connection with the lifting roller through a synchronous belt; the servo driver is connected with and controls the speed of the servo motor, and the servo driver further comprises a brake resistor which enables a rotor of the servo motor to generate reverse electromagnetic brake torque and controls the free rotation speed of the rotor of the servo motor. The system can effectively reduce accidents that the fabric is tangled in the roller, reduce fabric wiping marks and improve the fabric quality, and after the system is introduced, a mechanical tangling detection device can be omitted, the machine design can be simplified, the machine cost can be effectively reduced, and the competitiveness is improved.

A motor control apparatus includes: a motor configured to drive a load; and a control unit configured to control the motor. The control unit is configured to, when activating the motor, determine whether a predetermined condition for determining that fluctuation in magnitude of the load occurs is satisfied, activate the motor in a first mode when the predetermined condition is satisfied, and activate the motor in a second mode when the predetermined condition is not satisfied, and the first mode is a mode in which an increase in rotation speed of the motor is gentler than an increase in rotation speed of the motor in the second mode.

The present application provides a control device of an electric motor, which can quickly and effectively stop at a specific position, thereby achieving further high-speed positioning. The control device of the electric motor is used for stopping a rotating shaft rotating at a specified speed at a specific position after a stop instruction, and comprises: a first time calculation unit, which calculates a first time for stopping the rotating shaft at a target stop position without changing the rotating direction according to a current speed, the target stop position and an acceleration at the time of positioning; a second time calculation unit, which calculates a second time for stopping the rotating shaft at the target stop position by rotating the rotating shaft in the reverse direction after temporarily stopping the rotation of the rotating shaft according to the current speed, the target stop position and the acceleration at the time of positioning; a comparison unit, which compares the first time with the second time; and a directional stop control unit, which performs stop control of the electric motor in a manner of shortening the time until the rotating shaft is stopped at the target stop position based on the comparison result of the comparison unit.

To provide a power converter and a variable frequency drive that achieve more excellent stabilization effect and filtering effect.SOLUTION: A power converter 100 for receiving an AC input voltage VAC and converting AC to DC, comprises: a power storage unit; a plurality of silicon controlled rectifiers 1; and a first control unit 3. The silicon-controlled rectifier 1 becomes a full-bridge rectifier, being electrically connected to the power storage unit, being switched between a conductive state and a non-conductive state based on a received control signal S, and being capable of converting the AC input voltage VAC into a DC output voltage VO1 to output a DC voltage VO1 to the power storage unit. The first control unit 3 detects a zero-crossing point of the AC input voltage VAC and the DC output voltage VO1, and generates a control signal S based on the zero-crossing point and the DC output voltage VO1, so that the DC output voltage VO1 can be set to a predetermined voltage.SELECTED DRAWING: Figure 2

Provided is a control device and program capable of easily outputting the state of mechanical loss in an induction motor. A control device that controls an industrial machine having an induction motor includes: a power cutoff section that cuts off power supply to the induction motor; a speed acquisition section that acquires the rotational speed of the induction motor; an acceleration calculation section that calculates acceleration based on the acquired rotational speed; a moment of inertia acquisition section that acquires the moment of inertia of the main shaft of the induction motor; a mechanical loss calculation section that calculates the mechanical loss of the induction motor based on the acquired rotational speed, the calculated acceleration, and the acquired moment of inertia; and an output section that outputs the calculated mechanical loss.

The invention relates to the technical field of motor fault identification, in particular to a permanent magnet synchronous motor fault identification and analysis method for a belt conveyor, which comprises the following steps of: extracting a characteristic change rule of a stator current signal and a vibration acceleration signal of a permanent magnet synchronous motor under a typical fault condition; collecting a vibration signal and a current signal of the fault motor; carrying out noise reduction processing on the collected vibration signals and current signals; converting the vibration signal and the current signal after noise reduction into a two-dimensional image data set; vertically splicing and fusing the vibration signal image and the current signal image; dividing the fused image data into a training set and a test set according to a preset proportion; establishing a convolutional neural network model; and inputting the training set into the convolutional neural network model. According to the permanent magnet synchronous motor fault diagnosis method based on the data layer fusion strategy, the feature information of multiple fault modes of the permanent magnet synchronous motor is comprehensively captured, and the accuracy and robustness of fault recognition are remarkably improved.

A water pump electronic device capable of automatically adjusting the rotating speed in a timing mode and the water pump are characterized in that the electronic device comprises a speed adjusting module, a control module, a storage module and a communication module, the speed adjusting module comprises a relay set, a starting capacitor set and a coil set, and the relay set comprises a first relay, a second relay and a third relay; the starting capacitor set comprises a first starting capacitor, a second starting capacitor and a third starting capacitor, the coil set comprises a first main coil, a second main coil, a first auxiliary coil and a second auxiliary coil, the water pump comprises the electronic device, the rotating speed of multiple water pumps can be automatically adjusted in a timing mode, work of the water pumps is controlled, and the water pumps have multiple sets of control modes. The cost is low, the operation is simple, and the user experience is further improved.