207results about "AC motor accelaration/decelaration control" patented technology

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.

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 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.

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.

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.

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.

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.

To provide a fastening tool capable of restraining or preventing dispersion of a stop position when a driving mechanism stops.SOLUTION: The fastening tool includes a motor having a motor shaft, a housing, a pin-gripping part, a driving mechanism connected to the pin-gripping part and configured to perform rearward movement and forward movement, a position acquisition part configured to acquire a relative position of the driving mechanism, and a motor control part configured to switch a moving direction and a moving speed of the driving mechanism. The motor control unit starts forward movement of the shaft such that the movement speed becomes a first speed, decelerates the movement speed to a second speed slower than the first speed by PWM control for changing a duty ratio output to the motor when the acquired relative position reaches a deceleration position behind the initial position in the forward movement, and stops driving of the motor when the acquired relative position reaches a predetermined braking position in front of the deceleration position and behind the initial position.SELECTED DRAWING: Figure 11

A hand-held electrically powered cut-off tool (100) for cutting concrete and stone by a rotatable cutting disc (105), the cut-off tool (100) comprising an electric motor (130) arranged to be controlled by a control unit (110) via a motor control interface (120), wherein the control unit (110) is arranged to obtain data indicative of an angular velocity of the cutting disc (105), and to detect a kickback condition based on a decrease in angular velocity, wherein the control unit (110) is arranged to control an electromagnetic braking of the electric motor (130) in response to detecting a kickback condition, wherein the control unit (110) is arranged to determine an angular acceleration associated with the electric motor (130), and to detect the kickback condition based on a comparison between the determined angular acceleration and a configurable detection threshold.

The utility model discloses a motor control circuit and a pedestal pan. The motor control circuit comprises a control module, a first switch module, a second switch module and an impedance module. The control module, the motor, the first switch module, the second switch module and the impedance module are electrically connected to the first node and the second node. The control module outputs a first voltage signal or a second voltage signal. The first switch module responds to the first voltage signal and establishes a path for current to flow from the first node to the second node, so that the motor rotates in the first direction. And the first switch module responds to the second voltage signal and establishes a path for the current to flow from the second node to the first node, so that the motor rotates in the second direction. The second switch module is turned on in response to the motor outputting back electromotive force to the first node to establish an electrical connection between the second end of the impedance module and the second end of the motor. By means of the mode, the closestool cover can be controlled to be normally closed and opened, and meanwhile slow descending of the closestool cover when the closestool cover is closed is achieved.

This invention discloses a pressure regulation and alarm method for a dual-piston pump type medical water jet, relating to the field of control technology, which can solve the problem of existing water jets having difficulty in automatic pressure regulation. The embodiments of this invention disclose a pressure regulation method for a dual-piston pump type medical water jet, including the following steps: adjusting the motor speed to a preset speed V0, obtaining the effective current value I of the motor; obtaining the target current I0 corresponding to the preset speed V0 based on several sets of relationships f(V, I); calculating the difference between the target current I0 and the effective current value I, and comparing it with a preset threshold; if the absolute value of the difference is less than the preset threshold, maintaining the motor speed; if the absolute value of the difference exceeds the preset threshold, and I is greater than I0, reducing the motor speed; if the absolute value of the difference exceeds the preset threshold, and I is less than I0, increasing the motor speed; using the changed motor speed as the new preset speed V0, repeating steps S1 to S3 until the difference between the target current I0 and the effective current value I is less than the preset threshold.

The present application relates to the technical field of motor parameter estimation, and discloses a system optimization method based on motor parameter estimation and a motor tactile feedback system, wherein the method includes: calculating the damping motion frequency of the motor according to the detected back electromotive force of the motor in the aftershock stage; calculating the damping ratio of the motor in the aftershock stage according to the attenuation curve of the back electromotive force and the damping motion frequency; calculating the magnetic induction intensity coefficient of the motor according to the damping ratio and the maximum value of the back electromotive force; and adjusting the excitation signal and braking signal of the motor using the magnetic induction intensity coefficient of the motor and the damping ratio of the motor in the aftershock stage.

The invention discloses a cutting machine power-off control method and device, a program product and a storage medium, and is applied to the technical field of fault protection. The method comprises the steps that in the operation process of a cutting machine, the speed of a virtual main shaft is configured as the main speed; for any motor participating in wire net motion control, the target speed of the motor is determined based on the main speed and the speed following proportion of the motor, and the speed of the motor is controlled based on the target speed of the motor; when it is detected that the cutting machine is powered off, the target voltage of the direct-current bus is obtained; and reducing the main speed to a preset threshold value, and in the reducing process, taking the fact that the actual voltage of the direct-current bus is equal to the target voltage as a target of feedback control, and adjusting the deceleration of the main speed. By means of the scheme, the situation that the wire net is broken when the cutting machine is powered off can be avoided.

The utility model belongs to the technical field of acceleration control, and relates to an anti-interference Hall circuit of an acceleration rotating handle, which comprises a Hall element, a signal conditioning unit, a filtering unit, an output driving unit, a power input, a voltage stabilizing circuit and an electrostatic discharge protection circuit which are electrically connected, an output end of the signal conditioning unit is connected with a signal input end of the filtering unit, an input end of the filtering unit is connected with an output end of the signal conditioning unit, an output end of the filtering unit is connected with a signal input end of the output driving unit, and a ground wire of the filtering unit is connected with a ground wire of power input. The input end of the output driving unit is connected with the output end of the filtering unit, and the output end of the output driving unit is connected with the driving end of the motor. Noise interference in original signals is effectively suppressed, and stability and accuracy of the signals are ensured; the circuit can still work stably under different voltage fluctuations, and the robustness and reliability of the whole system are improved.

The invention provides a cutting speed regulation device for a two-speed motor coal mining machine and the two-speed motor coal mining machine, the coal mining machine comprises a two-speed motor used for driving a cutting roller to rotate, the cutting speed regulation device comprises an isolation switch, a power supply, a power supply, a power supply, a power supply, a power supply, a power supply, a power supply and a power supply control device, and the isolation switch is connected to a main power supply through a wire inlet device of the coal mining machine; and the two contactors are respectively connected between the isolating switch and the high-speed winding and the low-speed winding of the double-speed motor, and the double-speed motor is controlled to operate at a low gear or a high gear by switching the on-off states of the contactors. The speed regulation of the roller is realized by using the two contactors and the two-speed motor, the structure is relatively simple, and compared with a cutting variable-frequency speed regulation scheme, the cost is low, and the reliability is high; even if one contactor is damaged, the other contactor can be applied to operate in a single-speed mode, and the reliability is higher.

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 application provides a position change calculation method of a torque gun, comprising: acquiring a first multi-turn number N t1 and a first single-turn position St1 at a first time t1 and a second multi-turn number N t2 and a second single-turn position St2 at a second time t2 within a time interval less than a time of one rotation of a servo motor; judging whether a single-turn absolute value encoder is in a non-jump state, a positive rotation jump state or a reverse rotation jump state; obtaining a corrected turn number N mod at the second time t2 according to the state of the single-turn absolute value encoder at the second time t2 judged in the previous step; and obtaining a position change of the torque gun in the interval time according to the first single-turn position St1 and the second single-turn position St2 and the corrected turn number N mod. The application can quickly and accurately calculate the position change of the rotation of the torque gun. The application also provides a control method of the torque gun and a torque gun using the control method.

The invention discloses a control method and device of a servo system, equipment and a storage medium. The control method comprises the following steps: acquiring a current acceleration of the servo system at a current moment and one or more previous accelerations related to a previous time period adjacent to the current moment; determining whether the servo system vibrates or not based on the current acceleration and the one or more previous accelerations; if yes, an expected given value of a current loop of the servo system is determined based on the current acceleration and the dispersion of the one or more previous accelerations, and the expected given value is an input signal of the current loop of the servo system. According to the method, whether the servo system vibrates or not can be quickly recognized in a self-adaptive mode, effective suppression is carried out when the servo system vibrates, and good adaptability and stability are achieved.

The invention discloses a motor smooth linear acceleration and deceleration system and a control method, which are applied to the fields of robots, industrial automation, machine tool processing, transportation, metering detection, aerospace, energy production, industrial manufacturing and elevators. The problems that an existing S-shaped acceleration and deceleration algorithm cannot respond quickly, overshoot oscillation exists in a linear control algorithm, and obvious grading echelon acceleration and deceleration are not smooth due to existing fixed grading grade acceleration and deceleration are solved. Fixed-period linear smooth acceleration and deceleration parameters are obtained through scanning period optimization calculation, a driver receives precise control pulse signals of a control system in each scanning period, the driver drives a motor, the control system precisely collects motor encoder information and the motor through an encoder, and according to set target speed data and target acceleration and deceleration time data, the acceleration and deceleration parameters of the motor are calculated according to the set target speed data and target acceleration and deceleration time data. Scanning cycles are collected, reliable scanning cycles are optimized, ideal graded acceleration and deceleration parameters based on reliable scanning cycle data are judged, and speed control of each scanning cycle is accurately achieved.

The invention relates to the technical field of motor control, and provides a power-assisted control method and system applied to a motor, and the method comprises the steps: collecting a rotating speed sequence of the motor on a microcontroller of the motor, carrying out the differential operation of the rotating speed sequence, obtaining an acceleration sampling value, carrying out the chi-square test of the acceleration sampling value, and obtaining a credible acceleration; based on the credible acceleration, setting a gain coefficient value of the motor, and determining a reference current coefficient and a reference current; based on the credible acceleration, the gain coefficient value, the reference current coefficient and the reference current, calculating a power-assisted current value of the motor; based on the power-assisted current value, outputting power-assisted current of the motor through a driver; and performing power-assisted control on the motor according to the power-assisted current. All control algorithms and function modules can be integrated in the motor, and plug and play is achieved.

Provided is a construction machine capable of charging an electricity storage device using regenerative power of an electric motor, and capable of suppressing deterioration of the electricity storage device. This excavator is provided with: a motor; the controller outputs a rotating speed instruction; an inverter that controls the rotational speed of the motor in accordance with a rotational speed command from the controller; and a power storage device that outputs drive power to the inverter when the motor accelerates and inputs regenerative power from the inverter when the motor decelerates. When the motor decelerates, the controller outputs a rotation speed command to the inverter such that the reduction rate of the rotation speed of the motor is equal to or less than a predetermined limit value.

The invention provides a servo motor acceleration and deceleration curve implementation method and a servo motor control system, and belongs to the technical field of motor control. The method comprises the following steps: acquiring a target final speed value, a current actual speed value, a target acceleration value and an acceleration efficiency coefficient of the motor servo driver; constructing a smooth speed curve function based on the target final speed value C; calculating the difference value between the target speed and the actual speed, determining the motion direction according to the plus or minus of the difference value, and calculating the theoretical acceleration time T and the smoothing parameter b according to the acceleration; generating a continuous speed reference curve according to the smoothing parameter b and the target final speed C; the speed reference curve serves as a set value of a speed loop, closed-loop control is conducted on the motor through the PID controller, mechanical vibration and noise in the start-stop process are remarkably reduced, the service life of equipment is prolonged, and motion positioning precision and tracking stability are improved.