24results about "Linear DC motor control" patented technology

The invention discloses a high-precision closed-loop force control linear rotating motor and a force control method thereof, and relates to the technical field of motors, the linear rotating motor comprises a shell, a linear motor, a rotating output shaft part, a constant force spring device, a force sensor and a controller, the rotary output shaft part comprises a rotary motor, a rotary connecting piece and an output rotating shaft, and can realize composite motion of axial reciprocating and angular rotation; the constant-force spring device provides constant balance force in the linear direction to compensate for gravity loads. The force sensor detects output thrust in real time and generates a feedback signal; the controller performs closed-loop force control adjustment according to the feedback signal; according to the motor, through the built-in high-precision force sensor and the constant-force spring structure, high-precision, low-force-value and stable force control performance is achieved, output fluctuation can be effectively reduced, and the system response speed and control precision can be improved.

The invention discloses a driving waveform gain adjustment method and device, a controller, a chip and electronic equipment. The method comprises the following steps: acquiring a battery voltage; comparing the battery voltage with a predetermined total voltage protection threshold value; under the condition that the battery voltage is lower than the total voltage protection threshold value, the gain of a driving waveform output to a linear motor is adjusted according to the battery voltage and a preset gain and voltage mapping relation; wherein the gain and voltage mapping relation defines a corresponding rule between a battery voltage interval below the total voltage protection threshold value and the driving waveform gain. According to the invention, the driving current peak value can be actively inhibited when the battery voltage is low, so that the collapse of a system power supply network caused by the impact of a large load current is avoided, the technical problem that the system is easy to reset or crashed under a low electric quantity is effectively solved, and the power supply integrity, stability and reliability of the electronic equipment are remarkably improved.

A valve control system and method can include: a control logic configured to couple to a conductor and to a movable mechanism such that a back electromotive force (BEMF) peak is created within the conductor based on the movable mechanism being moved, the control logic further configured to: apply a control voltage to the conductor; detect the BEMF peak; determine a peak timing for the BEMF peak, and adjust a control voltage timing for the control voltage based on the peak timing.

A method may include receiving topology information associated with a linear motor system that includes multiple track modules. Each track module may include one or more motors. The topology information may include one or more media access control (MAC) addresses associated with the motors. The method may also include associating one or more IP addresses with the MAC addresses associated with the motors, generating a configuration file associated with the linear motor system based on the topology information and the IP addresses, and transmitting one or more commands to the motors to control or adjust one or more operations of the motors based on the configuration file.

The utility model discloses a control mechanism of a sliding massager, which relates to the field of massagers and comprises a frame body, a sliding rail arranged in the frame body, a sliding block arranged on the sliding rail and a connecting block fixed on the sliding block, the connecting block penetrates through a through groove arranged on the frame body and is fixedly provided with a massaging part, and the massaging part is fixed on the frame body. The massage head is assembled with the massage part; the belt displacement control mechanism is arranged in the frame body; the driving wheel and the driven wheel are arranged on the left side and the right side of the frame body, the transmission belt is in meshing transmission with the driving wheel and the driven wheel, and the transmission belt located below the sliding block penetrates through the sliding block, is fixedly connected with the sliding block and is used for driving the driving wheel to operate. The stroke and the speed of the massage part where the sliding block is located are controlled through the servo motor, so that various massage modes can be switched, and different parts of the body can be massaged to different degrees.

The application relates to the technical field of electromagnetic driving, and discloses an electromagnetic driving device, a motor and a control method of the electromagnetic driving device.The electromagnetic driving device comprises a permanent magnet, at least two magnetic cores and at least two coils; the magnetic core has a C-shaped structure; the at least two magnetic cores are oppositely arranged, the openings are opposite, and a magnetic circuit space is formed around the end of the magnetic core; the permanent magnet is arranged in the magnetic circuit space, and the permanent magnet moves in the horizontal direction in the magnetic circuit space; and the at least two coils are wound on the at least two magnetic cores respectively.The application can realize higher energy density and efficiency, and the C-shaped structure of the magnetic core enables the magnetic core to be more compactly arranged, effectively utilizes the space, and thus reduces the overall size of the device.The application can also realize accurate control of the position of the permanent magnet by adjusting the magnetization state of the magnetic core.

The invention relates to the technical field of motor control, and discloses a sensorless position estimation method applied to a swing motor of an electric hair clipper, and the method comprises the following steps: firstly constructing a position current linear mapping model based on quasi-static physical field hypothesis; in the conduction driving stage, the current of the motor is sampled in real time and substituted into the model to calculate the swing angle, and the current error is utilized to judge whether the target maximum swing angle is reached or not; and in a reset stage after driving revocation, identifying the original point of the rotor by monitoring a back electromotive force zero crossing point. In addition, the method further comprises the steps of excitation starting and dual-current threshold safety self-checking. The electromechanical coupling model is simplified, complex differential operation is converted into simple algebraic calculation, the requirement for the computing power of the microcontroller is lowered, full-period position closed-loop control and fault protection are achieved in combination with starting self-inspection and back electromotive force detection, and the electromechanical coupling control method has the advantages of being low in cost, high in real-time performance and high in reliability.

The invention relates to the technical field of planar motors, and provides a transition module for a planar motor system, a control method of the transition module and the planar motor system.The planar motor system comprises a stator platform formed by splicing a plurality of stators and a rotor running above the stator platform in a suspended mode, and a through hole is formed in the stator platform in the thickness direction; the transition module is arranged below the through hole and comprises a driving part and a transition plate, the driving part is connected with the transition plate, the transition plate can be driven by the driving part to ascend and descend in the direction close to or away from the through hole, and a transition coil array is arranged on the side, close to the through hole, of the transition plate. The position of the transition module can be adjusted along with the change of the position of the through hole in the stator, the flexibility is high, the response speed is high, and under the scene that the vacant position of the through hole in the stator is frequently changed, compared with changing of the path of the rotor, the arrangement of the transition module can save time, improve efficiency and reduce cost.

This disclosure provides a method, apparatus, and actuator driving system for generating a drive waveform. The method includes: calibrating the actuator's reference sampling rate based on the actuator's actual and ideal resonant frequencies to obtain a calibrated sampling rate; performing data acquisition based on the calibrated sampling rate to obtain various drive data; performing linear interpolation on each drive data based on the reference sampling rate to obtain interpolated data; and converting the interpolated data into a drive waveform for the actuator. Therefore, this disclosure generates a drive waveform with a fixed frequency based on the coordinated operation of frequency conversion sampling and linear interpolation, enabling adaptive frequency calibration of the drive waveform without adjusting the oscillator frequency, thereby improving the actuator's vibration performance.

The invention relates to the technical field of magnetic suspension systems, and particularly discloses a magnetic suspension rotor speed control system based on a neural network, which comprises an embedded controller, an instruction unit, a speed unit, an execution unit, a judgment unit and a control unit, the control unit adaptively adjusts PID parameters through a BP neural network, performs speed adjustment and updating in real time, then enters the execution unit for actual execution verification, judges whether to enter the speed unit again through the judgment unit, and performs a new round of execution verification and recursive execution until the judgment unit meets the requirements. The method is applied to the field of magnetic suspension rotor speed control, overcomes the defects that parameters in a conventional PID controller adopted in a control system of a magnetic suspension rotor are difficult to adjust, and the parameters are fixed and are difficult to face a complex time-varying system, automatically sets the parameters of the PID controller by adopting the self-learning capability of a BP neural network, adaptively adjusts the PID parameters, and improves the speed of the magnetic suspension rotor. And the robustness and reliability of the control system are improved.

The utility model provides a control circuit and an electric toothbrush, which are applied to the electric toothbrush, and the control circuit comprises a power supply circuit, an information acquisition circuit, a motor driving circuit, a main control circuit, a pressure sensing lamp circuit and a Bluetooth communication circuit. The operation state of the electric toothbrush is monitored in real time, the operation state comprises the pressure applied during tooth brushing, when it is detected that the pressure exceeds the safety threshold value, a user is prompted to adjust the force through tactile feedback and optical warning, and gingival injury and tooth hard tissue abrasion caused by excessive pressure are avoided. Meanwhile, a motor driving circuit is adopted to drive a motor to form sound wave vibration, so that water flow and toothpaste foam form micro jet flow which permeates into blind areas such as tooth slits and gingival sulcus which are difficult to cover by a traditional vibration type scheme, the dental plaque removal rate is increased, and the risk of caries and periodontal diseases is reduced. In addition, the operation state information of the electric toothbrush is synchronized to the mobile terminal through the Bluetooth communication circuit, and the user is helped to establish a scientific tooth brushing habit.

The invention relates to a linear motor transducer. The linear motor transducer comprises a driving vibration unit, a control and energy supply unit and a pressure balance unit which are sequentially arranged in the axial direction. The drive vibration unit includes: a head housing; the linear motor is arranged in the head shell; the front cover plate is connected with a rotor of the linear motor, so that the front cover plate can move along with the rotor; the front cover plate is formed by bonding a pressing ring, a rubber ring and a radiation cover plate through a vulcanization process. The linear motor is used as a driving source, the vibration frequency and displacement of the radiation surface can be accurately controlled, and the current actual frequency and vibration displacement can be mastered in real time.

The utility model provides a control circuit and an electric toothbrush, which are applied to the electric toothbrush, and the control circuit comprises a power supply circuit, a pressure sensing circuit, a motor driving circuit, a main control circuit and a pressure sensing lamp circuit. The pressure sensing circuit is arranged to monitor the pressure applied during tooth brushing in real time, when it is detected that the pressure exceeds the safety threshold value, the main control circuit triggers the motor to enter the preset overpressure mode on one hand and triggers the pressure sensing lamp circuit to give out the warning light effect on the other hand, in the process, a user is prompted to adjust the force through tactile feedback and optical warning, and the user experience is improved. Gingival injury and tooth hard tissue abrasion caused by excessive pressure application are avoided. Meanwhile, a motor driving circuit is adopted to drive a motor to form sound wave vibration, so that water flow and toothpaste foam form micro jet flow which permeates into blind areas such as tooth slits and gingival sulcus which are difficult to cover by a traditional vibration type scheme, the dental plaque removal rate is increased, and the risk of caries and periodontal diseases is reduced.

The invention relates to the technical field of electromagnetic vibrators, and discloses an electromagnetic vibrator SPWM (sinusoidal pulse width modulation) control method, which comprises the following steps: S1, building a control system: the control system comprises an MCU (microprogrammed control unit) control module, the MCU control module is connected with a FLASH module and a CPLD (complex programmable logic device) editor, the MCU control module is connected with the CPLD editor through an SPI (serial peripheral interface) module, and the MCU control module is connected with the CPLD editor; the MCU control module is provided with a CAN interface module used for receiving a control instruction and a UART communication module used for outputting information. A closed-loop feedback control mode is adopted, and the defects that the actual amplitude of a vibration tray of the vibrator cannot be judged, the amplitude of the vibration tray of the vibrator cannot be accurately adjusted, and the discharging speed and the yield cannot be judged due to the fact that no feedback exists in open-loop control of a traditional vibrator are overcome. The amplitude of the vibrator can be adjusted, a vibrator tray can be adjusted, and discharging can be accurately controlled; and an SPWM control mode is adopted, so that the current of the vibrator tends to be in a sine wave form, the ascending and descending processes become slow, the jumping phenomenon of materials on the tray is reduced, and the discharging effect is improved.

The invention discloses a push rod motor stretching in-place judgment method and a judgment system thereof, which are used for judging the in-place of a push rod motor by detecting the current of the push rod motor and acquiring, detecting and judging the change so as to realize the in-place stop execution control of the push rod motor. A Hall sensor does not need to be installed in the push rod motor, wiring and wire outgoing in the push rod motor are simple, an in-place sensor does not need to be additionally arranged on the whole vehicle structure, and the structure is simple. Whether the collected current of the push rod motor under different conditions meets the judgment condition mode that I is equal to 0A or not is judged through sampling detection, and then corresponding different control modes are executed, so that the situation that the electric push rod under different electric quantities of a power supply is different in unfolding or stretching time can be avoided; and the situation that the electric push rod is different in unfolding or stretching time due to different weights of the frame can be better avoided, and whether the push rod motor stretches in place or not can be better judged by directly judging a set fixed current judgment value.

The embodiment of the present application discloses a position tracking method for a linear direct drive motor. The method comprises: obtaining an error state prediction model and an input state prediction model pre-constructed for the linear direct drive motor, and determining a control law parameter solution space of a control law with respect to an error state, wherein the control law is a parameter to be determined in the error state prediction model and the input state prediction model; for each constraint term based on the linear direct drive motor, determining a target model corresponding to the constraint term in the error state prediction model and the input state prediction model, and determining a function expression of the constraint term based on the target model; and determining a target parameter of the control law from the control law parameter solution space based on all the determined function expressions, so as to track the position of the linear direct drive motor based on the target parameter. The technical scheme of the embodiment of the present application can improve the flexibility of position tracking of the linear direct drive motor.

The invention relates to a sensorless adaptive valve control system. A valve control system and method may include control logic configured to couple to a conductor and a movable mechanism such that a back electromotive force (BEMF) peak is generated within the conductor based on movement of the movable mechanism, the control logic further configured to: apply a control voltage to the conductor; detecting a BEMF peak value; determining a peak timing of the BEMF peak; and adjusting a control voltage timing of the control voltage based on the peak timing.

The invention discloses a linear motor thrust ripple feedforward suppression system based on disturbance energy observation, and belongs to the field of linear motor control, the system calculates disturbance energy caused by thrust ripple by electromagnetic energy, load consumption energy and rotor kinetic energy variation according to an energy balance relation in a control period; calculating equivalent disturbance current according to the disturbance energy and the rotor speed; and finally, superposing the disturbance current and the collected bus current to generate a synthetic current, and injecting the synthetic current into the linear motor in a feedforward manner. According to the invention, the use of inductors, capacitors and other devices is avoided, so that the circuit design is simplified, the size, weight and cost of the system are reduced, and the stability and reliability of the system are improved. In addition, through a feedforward control method, bandwidth limitation and response lag caused by a PID controller are avoided, the dynamic response speed and the adjustment precision of the system are remarkably improved, the motor control performance is improved, and the overall efficiency of the system is improved.

The invention relates to a motor driving method, electronic equipment and a driving chip, and relates to the technical field of motors. The motor driving method comprises the following steps: acquiring the real-time temperature of the motor; acquiring a temperature scale factor, wherein the temperature scale factor is a ratio between the real-time temperature and a preset reference temperature; acquiring a compensation parameter of the driving signal of the motor according to the temperature scale factor, wherein the compensation parameter is used for compensating the offset of a reference driving parameter of the driving signal of the motor along with the temperature change; generating a target driving signal of the motor at the real-time temperature according to the compensation parameter and the reference driving parameter corresponding to the compensation parameter; the target driving signal is used for driving the motor. By adopting the method, temperature drift compensation can be realized so as to improve the motor driving control precision.

Embodiments of the present application relate to the technical field of imaging, and disclose a focus motor, a closed-loop control method for a focus motor, and an imaging device. 【Solution means】The focus motor includes a first pole plate (10), a second pole plate (20), a hovering conductor plate (30), a mover holder (40), and a processing unit. The first pole plate (10) and the second pole plate (20) are fixedly installed and arranged perpendicular to the focusing direction. The hovering conductor plate (30) is installed opposite to the first pole plate (10) and the second pole plate (20) respectively. The hovering conductor plate (30) is provided on the mover holder (40). The mover holder (40) is movable in the focusing direction. The projection area between the hovering conductor plate (30) and the first pole plate (10), and the projection area between the hovering conductor plate (30) and the second pole plate (20) both change according to the movement of the mover holder (40). A reference capacitance is formed between the first pole plate (10) and the second pole plate (20). The processing unit controls the movement of the mover holder (40) in the focusing direction based on the reference capacitance.

The application discloses a high-precision linear vibration feedback motor system and relates to the technical field of precise electromagnetic driving, which comprises the following steps: a moving-magnet linear motor with a Halbach array magnetic circuit structure is adopted as a core driving module, and a plurality of physical field sensing units are integrated; a dynamic parameter tracking module is adopted to collect spring stiffness coefficients, damping coefficients and magnetic force constants in real time when the motor is running, and a dynamic displacement model is established based on a recursive least square method; a double closed-loop control architecture is adopted, a magnetic field oriented control is adopted in an inner loop, and model predictive control is adopted in an outer loop; an aging prediction unit is adopted, when the cumulative vibration frequency is greater than a predetermined threshold, a temperature rise compensation algorithm is activated; an adaptive calibration engine is adopted, a sweep excitation signal is injected when the system is started, and individual difference parameters are automatically compensated according to resonance peak offset; a digital twin mapping unit is adopted to establish a real-time mapping relationship between motor physical parameters and a virtual model, and model parameters are dynamically corrected by comparing actual displacement and model displacement.

SUMMARY OF THE PRESENT EMBODIMENT A direct drive transmission system and control method is provided. [Solution] The direct drive transmission system includes a substrate, a guide rail, a plurality of stators, a mover, a plurality of drivers, and a controller, the stators are used to drive the mover to slide on the guide rail, the transmission lines on which each stator is located are arranged as a low-precision segment and a high-precision segment connected to each other, the direct drive transmission system includes a first switching signal device and a plurality of second switching signal devices, the first switching signal device and the second switching signal device are installed correspondingly, and each second switching signal device is electrically connected to a corresponding driver or both are electrically connected to a controller. The present invention can reduce the usage of the position feedback device and reduce the cost of the device by adopting the switching signal device instead of the expensive position feedback device in the low-precision segment. At the same time, the motion control in the low-precision segment of the mover is simple, so that the control cost can be reduced and the cost can be further significantly reduced.

The invention belongs to the technical field of electromagnetic emission, and discloses an enhanced electromagnetic track emission device and method based on parallel coils, the device comprises tracks and an armature, the tracks are arranged on two sides of the armature in parallel, the tracks and the armature are used for conducting current, one side of each track is provided with a coil, and the coils are independently connected with the tracks. The head end and the tail end of the coil are electrically connected with the output end of the power control unit, a magnetic field generated after the coil is powered on is used for enhancing the magnetic field of the track and the electromagnetic driving force of the armature, the chamber-out speed and the launching efficiency of the electromagnetic launching device are improved, and the electrical contact performance of the armature and the track is remarkably improved by restraining a damage mechanism of a low-speed section. The service life of the rail is prolonged, the reliability and launching times of the whole electromagnetic launching device are fundamentally improved, the armature abrasion loss and the instantaneous peak temperature of the rail are accurately predicted through the enhanced rail gun launching performance prediction model, and the performance of the electromagnetic rail launching device under different working conditions can be pre-judged in advance.

The invention relates to the technical field of tactile feedback, and discloses a music vibration real-time mapping generation method fusing emotion input and tactile feedback, and the method comprises the steps: measuring an absolute tactile perception threshold value of a user; audio and physiological signals are collected to solve the emotion awakening degree and titer; the audio is decoupled into transient and steady-state components by using a recursive least square filter modulated by the wake-up degree; generating deterministic stochastic resonance noise based on the sensing threshold and shunting; combining the wake-up degree to synthesize a driving signal and superposing noise to drive an actuator; and constructing a Kalman observer containing noise feedforward, and calculating a virtual damping coefficient according to the emotion titer at the end of a transient state to implement active braking. Signal separation parameters and physical damping characteristics are adjusted through physiological signals, weak detail perception is enhanced through stochastic resonance, and deep fusion and real-time mapping of tactile feedback and user emotional states are achieved.