142results about "AC motor accelaration/decelaration control" patented technology

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.

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.

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 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 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.

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 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.

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.

According to one aspect of the present invention, an electric working machine is provided with a brushless motor, a drive circuit, and a control circuit. The control circuit performs a driving operation, a braking operation, and a switching operation. During the driving operation, the brushless motor rotates on the basis of the induced voltage of the brushless motor. In a braking operation, a pair of switches among the 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 action comprises switching the switch pair. In the switching operation, the switch to be turned off is turned off on the basis of the current flowing through the switch to be turned off satisfying the turning-off requirement.

The present application relates to a massage chair motor speed regulation method, device and medium, belong to motor control technology field, including the following steps: obtaining the acceleration data of massage chair motor;Construct three-axis acceleration synthesis model and the acceleration data is as three-axis acceleration synthesis model input, output comprehensive acceleration;Based on the comprehensive acceleration obtains the motor speed of massage chair motor;Calculate the speed deviation of the motor speed and the reference speed, based on the deviation obtains the sliding mode surface;Based on the sliding mode surface adopts PID algorithm to obtain the PWM duty ratio of massage chair motor.The present application combines sliding mode variable structure control and adaptive PID algorithm, can real-time adjust control parameter according to the speed deviation, ensure that the motor speed is stable under various load conditions.

The application provides a GA-RK-based quick vertical lifting method of an electric cylinder, which divides the vertical lifting process of the electric cylinder into four stages: a constant torque control electric cylinder is used for vertical lifting in the vertical lifting starting stage; the initial vertical lifting angle and the vertical lifting angular velocity are the vertical lifting angle and the vertical lifting angular velocity corresponding to the last point of the constant torque stage, the motor rotating speed is calculated, when the motor power reaches the rated power of the motor, a constant power control electric cylinder is used for vertical lifting, when the motor rotating speed reaches the rated rotating speed of the motor, a constant rotating speed control electric cylinder is used for vertical lifting, then a uniform deceleration mode is used to control the electric cylinder for deceleration until the electric cylinder stops, and the time of the deceleration stage is obtained. In the whole planning process, the electric cylinder pushes the load according to the four stages of constant torque, constant power, constant rotating speed and uniform deceleration, and fitting transition stages are added in each stage, so that the shaking and impact of the load are reduced, and the total vertical lifting time can be reduced under the same motor condition.

The utility model belongs to the field of electric vehicles, and relates to an anti-interference Hall circuit for an acceleration handle of an electric vehicle, which comprises a power input circuit, an LC filter circuit, a first capacitor filter circuit, an electrostatic protection circuit, a voltage stabilizing circuit, a high-frequency noise suppression circuit and a second capacitor filter circuit which are electrically connected in sequence, the voltage stabilizing circuit is further electrically connected with the second capacitor filter circuit, the LC filter circuit is further electrically connected with the high-frequency noise suppression circuit, the power input circuit is used for introducing battery voltage of the electric vehicle, and the LC filter circuit is used for filtering high-frequency noise and ripples in power input. The first capacitor filter circuit is used for further filtering high-frequency noise and ripples in the power supply, the electrostatic protection circuit is used for preventing damage caused by electrostatic discharge, and the voltage stabilizing circuit is used for keeping output voltage stable. The accuracy and the reliability of the signal are improved; and the output voltage is further smoothed, and ripples and noise are remarkably reduced, so that the anti-interference capability and the stability of the whole circuit are improved.

Enhanced network power factor corrective designs are presented that can use corrective devices that achieve long-term, operationally stable mechanical work. Embodiments can utilize reverse-winding induction motor designs with engineerable parameters and configurations for the reverse winding (13) in systems and through methods where an inductive motor (1) can present a current that leads voltage and a leading power factor (16) to correct other existing induction motors (8) in an initial network (9) or be optimized for a particular application. Designs also present a power factor correction that can present a variable correction without altering the character or physical capacitive value of an electrical correction component. Individual induction motors that have leading current and a leading power factor (16) can be provided to improve reverse winding induction motors. Progressive start controls (23) can also be used in a manner that limits inrush current to operational levels with passive current establishment control where reverse winding (13) effects can be used and perhaps even delayed to passively limit and even effect a current decrease while rotational acceleration continues after initial start transition.

A fastening tool includes a driving mechanism that is connected to perform rearward movement and forward movement, a position obtaining part that is configured to obtain a relative position of the driving mechanism, and a motor controlling part that is configured to change a moving direction and a moving speed of the driving mechanism. The motor controlling part starts the forward movement of the driving mechanism such that the moving speed reaches a first speed; reduces the moving speed to a second speed lower than the first speed by PWM control for changing a duty ratio outputted to the motor, when the obtained relative position reaches a deceleration position rearward of the initial position in the forward movement, and stops driving of the motor when the obtained relative position reaches a predetermined braking position forward of the deceleration position and rearward of the initial position.

The invention discloses a driving method for reducing pause sense of a scooter, and aims to provide a driving method for reducing pause sense of a scooter by monitoring the rotating position of a rotating handle and the angle of the rotating handle rotating at a target position as a monitoring standard and changing the output current to control the rotating speed of a motor. According to the technical scheme, the driving method is characterized in that the power, the accelerated speed and the rotating speed are set and serve as comparison bases, the rotating speed of a motor of the scooter is controlled through current output, or the position of a Hall element in a rotating handle assembly is monitored, so that the stability of the scooter is improved. Whether the acceleration needs to be controlled or not is judged by monitoring the rotating angle of the rotating handle, starting and stopping of the motor can be achieved by rotating the rotating handle, however, the acceleration of the motor is controlled by the set acceleration, the pause feeling caused by driving is reduced to a great extent, and the electric vehicle control method and device are suitable for the technical field of electric vehicle control.

The invention relates to an electric clipper motion control device and method with jitter removal and precise brake control. The electric clipper motion control device comprises a motor drive control module, a position detection module (ADC feedback), a multi-stage speed subsection control module, a jitter removal control module and a precise brake module. Through multi-stage dynamic speed segmentation, feedback position judgment and a self-adaptive acceleration compensation mechanism, the whole movement process of the electric clipper is smooth and free of jitter, self-adaptive jam release is supported, the braking action is accurate when the electric clipper passes through a jam area in an acceleration mode, the stop position error is smaller than one position value, the problems of overshoot and rebound of the clipper are solved, the user experience is remarkably improved, and the user experience is improved. And the control logic is high in universality and can be transplanted to a multi-channel fader array system.

A method of operating a power tool includes identifying a performance factor of a battery pack operably connected to the power tool using a controller of the power tool based on coded data received from the battery pack. The method also includes operating an electric motor of the power tool, using the controller, at a first maximum speed when the identified performance factor is greater than or equal to a threshold value, and operating the electric motor, using the controller, at a second maximum speed when the identified performance factor is less than the threshold value. The second maximum speed is less than the first maximum speed.

The invention discloses a rapid storage warning fence integrated trolley for a transformer substation and a control system, and relates to the technical field of power system safety, and the trolley comprises a structure sensing analysis module which is used for collecting the physical characteristics of a fence and the structural parameters of a storage box, and determining the spatial constraint condition of storage path planning; and the kinematics modeling module is used for establishing a kinematics model of the fence in the storage process based on the determined spatial constraint condition, and determining an optimal storage path in combination with an A * algorithm. According to the method, the physical characteristics of the fence and the structural parameters of the storage box are accurately collected, the kinematics model is established in combination with the kinematics modeling module, the optimal storage path is planned through the A * algorithm, the problems of winding, jamming and the like caused by undefined path planning in a traditional storage mode are effectively solved, the storage time of the fence is remarkably shortened, and the storage efficiency of the fence is improved. The fence arrangement and recovery efficiency in the maintenance and emergency operation of the transformer substation is improved, and the manpower and time cost consumed by equipment carrying and arrangement is reduced.

The invention belongs to the field of food industry automation, and relates to a device and a method for improving the precision of an euphausia superba meter. Uncertain factors such as external disturbance and friction force in the system are inhibited by adopting a self-adaptive jerk controller, the robust gain is converged in a bounded range by adopting a self-adaptive law, and the robustness of the system is improved; a feedback control law is formed after integration of output signals of the self-adaptive jerk and acceleration controller, and stability and continuity of the control signals are guaranteed. Therefore, the positioning precision is improved, a stable control signal can be generated, the control performance of the system is obviously improved, the tracking error is reduced, high-frequency oscillation is avoided, and the control precision of the linear motor servo system is improved. Besides, the high-performance Hall sensor and the grating ruler are adopted, the precision of signal acquisition is improved, the TMS320F28379D chip is used as a core processor, the data processing capability of the servo system is improved, and the tracking precision is improved.

The invention provides a bidirectional long-short-term memory neural network track point interpolation model (Bi-LSTM-Att) based on an attention mechanism, and the operation period of a numerical control system is much longer than the control period of a permanent magnet synchronous motor (PMSM), so that high-precision interpolation of the rotation angle of a PMSM rotor needs to be carried out on a position instruction sequence given by the numerical control system. And meanwhile, smooth acceleration transition of the PMSM is ensured. In order to solve the problem, the method utilizes Bi-LSTM to simultaneously analyze sequence data from front and back directions, so that a model is helped to understand the global trend of acceleration change and is prevented from falling into local optimum, and meanwhile, the Att-based model can automatically identify and distribute more weights to time points or features beneficial to acceleration smooth transition, so that the accuracy of acceleration smooth transition is improved. And finally predicting to obtain the rotor rotation angle and the rotor rotation speed of the PMSM in the next period. According to the method, the interpolation precision of the PMSM track points can be improved, and a more stable control effect can be obtained.