367results about "DC motor speed/torque control" patented technology

The embodiment of the invention discloses a brush direct current motor control method and device, equipment and a medium. The brush direct current motor control method comprises the following steps: determining the partial voltage of the brush direct current motor; detecting the real-time current of the brush direct current motor; the induced electromotive force is calculated based on the voltage division law by adopting the divided voltage, the real-time current and the impedance characteristic of the brush direct current motor; calculating the real-time rotating speed of the brush direct current motor by adopting the induced electromotive force based on the law of electromagnetic induction; and under the condition that the real-time rotating speed of the brush direct current motor is smaller than a rotating speed threshold value, determining that the brush direct current motor is in a locked-rotor working condition. According to the method for judging whether the brush direct current motor is locked or not, a Hall sensor does not need to be arranged, a connecting pin used for being connected with the Hall sensor and a corresponding signal processing circuit do not need to be arranged in a circuit board used for data processing, the limited surface area of the circuit board is saved, and the utilization rate of the circuit board is improved.

The present disclosure provides a multi-actuator haptic feedback device comprising an array of linear resonant actuators (LRAs) arranged in multiple directions to produce advanced haptic effects through coherent phase control. The device utilizes phase switching and phase modulation techniques with specific timing to control haptic outputs in multiple spatial directions. Methods are disclosed for optimizing energy consumption by storing energy in the mechanical inertia of the LRAs and efficiently releasing it during haptic events. Additionally, techniques for concealing internal state transitions using a spinning reserve mode are provided, enhancing user experience by preventing undesired haptic sensations during transitions. Applications include touchpads, touchscreens, mobile phones, game controllers, wearable devices, and automotive interior touch surfaces.

The utility model provides a motor controller integrated module, a power supply device and an electric vehicle, the motor controller integrated module integrates a bus capacitor, a radiator and two groups of power modules, the bus capacitor comprises a shell and a capacitor core package, the shell comprises an accommodating groove, the accommodating groove is used for accommodating the capacitor core package, and the capacitor core package is arranged in the accommodating groove. The length of the capacitor core bag in the width direction is smaller than the length of the capacitor core bag in the length direction, and the groove peripheral wall of the containing groove comprises two first side walls opposite to each other in the width direction of the capacitor core bag. The two groups of power modules are laminated with a heat dissipation plate of the heat sink along the width direction of the capacitor core package and are arranged on one side, deviating from the other first side wall, of one first side wall, each group of power modules comprises three power modules, and the thickness direction of each power module is parallel to the width direction of the capacitor core package; the bus capacitor and the two groups of power modules are stacked, so that the size of the motor controller integrated module is reduced, the size of the power supply device is further reduced, and the layout of the whole vehicle is optimized.

The invention discloses a robust Bayesian identification method for a state space model of a DC motor motion system, and relates to the technical field of industrial automation. The invention aims to solve the problem of poor model parameter estimation precision under the conditions of non-Gaussian noise and unknown system state in the prior art. The method comprises the following steps: establishing a mathematical description of a parameter identification problem of a state space model of a direct current motor motion system to determine to-be-identified parameters of the state space model of the direct current motor motion system; constructing posterior distribution of the to-be-identified parameters; constructing an augmented state space model having the same form as the logarithmic posteriori distribution of the to-be-identified state vector, and optimizing the to-be-identified state vector according to the augmented state space model; and carrying out iterative calculation by utilizing an optimization result and the posterior distribution of the other to-be-identified parameters except the to-be-identified state vector to obtain parameters of the state space model of the direct current motor motion system until a convergence condition is met, and completing parameter identification of the state space model of the direct current motor motion system.

The invention relates to the technical field of motor position control, in particular to a direct-current servo motor position control method and system based on operation analysis, and the method comprises the steps: obtaining a target direct-current servo motor, obtaining a target model according to the target direct-current servo motor, obtaining a moving position parameter, and obtaining a plurality of parameter adjustment intervals, obtaining a plurality of parameter combinations based on a plurality of parameter adjustment intervals, obtaining an optimal operation state of a target direct current servo motor, obtaining a moving target site, obtaining a current site of the target direct current servo motor, constructing a moving path based on the current site and the moving target site, obtaining curve characteristics of the moving path, dividing the moving path, and obtaining the target direct current servo motor. The method comprises the steps of obtaining multiple sections of divided paths, simulating the divided paths, confirming energy-optimal parameter combinations, summarizing the energy-optimal parameter combinations, obtaining an energy-optimal parameter combination set, and completing direct current servo motor position control based on operation analysis on the basis of the energy-optimal parameter combination set. According to the invention, efficient energy consumption management and accurate position control can be realized.

The invention discloses a motor phase current acquisition method and system, and the method comprises the steps: obtaining the duty ratio of a drive signal of a motor drive circuit for one bridge arm in the motor drive circuit; if the duty ratio is greater than or equal to a preset threshold value, recording a first voltage sampling signal when a switching tube of a lower bridge arm in the bridge arms is switched on, and determining a motor phase current according to the first voltage sampling signal; and if the duty ratio is smaller than the preset threshold value, recording a second voltage sampling signal when the switching tube of the lower bridge arm in the bridge arms is switched off, and determining the phase current of the motor according to the second voltage sampling signal.

The invention discloses an automatic zoom lens control system and method, and belongs to the technical field of semiconductor packaging test automation equipment. Wherein the lens module comprises a lens structure assembly and a motor structure assembly, the lens structure assembly comprises a lens, the motor structure assembly comprises a rotor, a coil and a stator, and the rotor, the coil and the lens are rigidly connected together and do axial movement at the same time; the control module comprises an industrial personal computer, a motion control card and a driver, the motion control card and the driver are in communication connection with the industrial personal computer, and the motion control card is used for executing motor motion planning and calculating the output quantity of the position loop improved two-order reduction linear active disturbance rejection controller. According to the automatic zoom lens control system and method, the lens is controlled to zoom automatically, clear images of chips with different heights on the weldment are obtained, and it is guaranteed that the zoom device is high in precision and high in automatic zoom speed while automatic zoom is achieved.

A voice coil motor (VCM) in a hard disk drive is operated in a discontinuous mode with an alternation of on and off times. A drive current to the VCM is facilitated and countered with a variable voltage across the during the on-times and off-times. The intensity of the drive current is controlled as a function of a Back ElectroMotive Force (BEMF) of the VCM. A method includes sampling during the alternation of on-times and off-times first and second values of the voltage across the VCM. The first value is sampled at a first time in response to the end of the off-time. The second value is sampled at a second time in response to the drive current of the VCM zeroing following the supply of drive current to the VCM being countered during the off-time. The BEMF is calculated as a function of first and second values.

The invention provides a voice coil motor control system and method. The voice coil motor control system comprises a voice coil motor, a laser light source, an interferometer, a square wave circuit and a processing unit. The laser light source is used for transmitting a laser signal to the interferometer; the interferometer is used for generating an interference signal based on the laser signal; the square wave circuit is used for generating n square wave signals based on the interference signal and n voltage thresholds; the processing unit is used for acquiring a moment sequence, and traversing each moment from the (2n + 1) th moment of the moment sequence as a current moment; determining a target duration based on the current moment and a reference moment before the current moment; determining a speed feedback value based on the target duration and the reference distance; and the processing unit is used for determining a speed deviation value based on the speed feedback value and the obtained target speed value, and controlling the movement speed of the voice coil motor based on the speed deviation value. According to the technical scheme, the feedback period of the speed feedback value is short, and the accuracy of motion speed control is improved.

The present invention relates to the field of motor speed control, and in particular to a method for controlling the speed of a brushed motor, comprising a motor control unit, a motor speed signal detection unit, and an interface M+, an interface M‑, and an interface S; the motor control unit is connected to the interface M+ and the interface M‑, the motor speed signal detection unit is connected to the interface S, and the output end of the motor speed signal detection unit is connected to a MOTO_CH port; the specific steps include: in an initial stage, a constant voltage method is used to control the brushed motor, and after the brushed motor is quickly accelerated to approach a target speed value of the brushed motor, constant speed control is switched to, and a pulse time between the interface S and the interface M+ and the interface M‑ of the brushed motor is increased to obtain a speed at which the brush of the brushed motor rotates one circle, thereby accurately obtaining a speed value of the brushed motor, and accurately regulating the speed of the brushed motor through the motor control unit, thereby avoiding the problem of poor motor speed control accuracy caused by differences in internal resistance inside the motor.

The present invention belongs to the field of motors, and particularly relates to a voice coil motor, comprising: a mounting housing; a permanent magnet structure, which is mounted on the mounting housing; a coil mounting structure, which is mounted on the mounting housing; a bearing structure, which is mounted on the mounting housing; an elastic structure, which is mounted on the mounting housing; a fixing structure; and a voice coil motor control system for controlling the parameters of the voice coil motor. By adjusting the fixing structure, the elastic structure can be fixed on the mounting housing after the elastic structure is placed. When the elastic structure needs to be replaced, the elastic structure can be taken out and replaced by adjusting the fixing structure again. Therefore, when the elastic structure is damaged, it is not necessary to replace the whole. Moreover, the bearing structure makes the movement of the coil mounting structure more stable. Through the voice coil motor control system, the control parameters can be automatically adjusted to adapt to the unknown environment and system nonlinearity, improving the system performance and robustness.

The invention relates to the field of motor control, in particular to a three-closed-loop voice coil motor control method based on a sliding mode-active disturbance rejection technology, and the three-closed-loop voice coil motor control method comprises a position loop, a speed loop and a current loop. Wherein the position loop adopts an active disturbance rejection control (ADRC) method, the internal uncertainty and external disturbance of the system are estimated and compensated in real time through an extended state observer, and meanwhile, control output is quickly adjusted by using an error feedback control strategy, so that high-precision position tracking is realized; the speed ring adopts a sliding mode control strategy, and the speed signal is accurately controlled by using the characteristics of high robustness and quick response of sliding mode control, so that the dynamic performance and the anti-interference capability of speed control are enhanced; the current loop adopts a classic PI control method, so that the current of the motor can be quickly and accurately adjusted; a temperature compensation mechanism is added, electrical parameters in a system state equation are updated through a temperature-parameter model, and errors of three-closed-loop control are reduced.

The invention relates to a method for absorbing energy in an electric drive system (1), in particular a drive system for operating an entry system or door system of a vehicle, the system comprising: an electric drive motor (M) for driving a drive body (2); and a motor control circuit (3) for controlling the drive of the drive motor (M). In said method: electric energy is supplied in a controlled manner to the drive motor (M) via the motor control circuit (3) in a driving operating mode and electric energy is absorbed by the drive motor (M) via the motor control circuit (3) in a braking operating mode; and optionally at least one part of the absorbed energy is converted into heat in a controlled manner by an ohmic resistor of the drive system (1) by injecting an alternating current into the drive system (1). The invention also relates to an electric drive system (1), in particular a drive system for operating an entry system or door system of a vehicle, which is controlled by means of such a method.

The utility model provides a voice coil motor driving circuit capable of switching working modes and a gamepad, which comprise an audio power amplification sub-circuit, an H-bridge driving sub-circuit, a change-over switch sub-circuit and an MCU (Microprogrammed Control Unit) control sub-circuit, and is characterized in that the input end of the audio power amplification sub-circuit is electrically connected with the audio signal output end of the MCU control sub-circuit; the output end of the audio power amplification sub-circuit is electrically connected with the first input end of the change-over switch sub-circuit; the input end of the H-bridge driving sub-circuit is electrically connected with the PWM signal output end of the MCU control sub-circuit, and the output end of the H-bridge driving sub-circuit is electrically connected with the second input end of the change-over switch sub-circuit; the control end of the change-over switch sub-circuit is electrically connected with the control signal output end of the MCU control sub-circuit, and the output end of the change-over switch sub-circuit is electrically connected with the voice coil motor. According to the utility model, an audio driving mode and a PWM driving mode can be adopted, and the driving modes can be switched, so that different vibration sense experiences can be realized in different scenes.

DC motor (1) for operation in an external magnetic field comprising: a rotor (2) which is rotatable about an axis of rotation (5) and has at least two windings (10, 11), at least four continuous rotary transformers (3), two rotary transformers (3) being assigned to each of the windings (10, 11) and being designed to supply the respectively assigned winding (10, 11) with direct current, an angle sensor (4) designed to determine the angular position of the rotor (2), and a control unit (15) designed to control the current supply to at least one of the windings (10, 11) as a function of the angular position of the rotor (2), wherein the motor (1) is aligned with an external magnetic field during operation such that the axis of rotation (5) extends transversely to the external magnetic field.

The utility model discloses a building block type development board based on an ARM (Advanced RISC Machines) platform, which is characterized by comprising a core board and an expansion board electrically connected with the core board, and the core board is provided with a minimum system circuit, a USB (Universal Serial Bus) to serial port circuit, a USB functional port circuit and a serial port one-key downloading circuit, the minimum system circuit is respectively and electrically connected with the USB function port circuit and the serial port one-key downloading circuit, the serial port one-key downloading circuit is electrically connected with the USB to serial port circuit, the expansion board is provided with a power supply switching circuit, a voltage conversion circuit and an expansion circuit, the power supply switching circuit is electrically connected with the voltage conversion circuit, and the voltage conversion circuit is electrically connected with the expansion circuit. The size of the development board is reduced, the customization convenience is improved, the expansibility is enhanced, the cost is reduced, an external USB to serial port line and a downloader downloading program are not needed, and the convenience is improved.

The utility model relates to the technical field of electrical control, in particular to a mobile square cabin electrical control box, which comprises a power supply module, a motor driving module, a control module and a connecting module, and is characterized in that the power supply module is respectively connected to the motor driving module and the control module through the connecting module; the power supply module comprises a battery pack, a mains supply access interface, an inverter and a switching power supply, the connection module comprises a power supply interlocking change-over switch, a grounding terminal strip and an air conditioner, the mains supply access interface is connected to the inverter, one path of output end of the inverter is connected with the base station equipment, and the other path of output end of the inverter is connected with the power supply interlocking change-over switch. According to the utility model, through the first interlocking change-over switch and the second interlocking change-over switch, the flexible switching between the commercial power and the power supply of the battery pack is realized, and the working continuity of the mobile square cabin in various environments is improved.

The invention provides an acceleration dynamic control method and system for a slotless armature direct-current servo motor, and the method comprises the steps: detecting and analyzing the actual motion data of the slotless armature direct-current servo motor in a process of driving a load to move, and determining a speed unstable motion interval of an output shaft of the servo motor; acquiring and analyzing working current data corresponding to the servo motor on the basis of a motion passing time interval corresponding to the motion interval with unstable speed, and determining an ideal motion speed change condition of the output shaft under the action of corresponding working current, so as to generate ideal motion speed change data and provide an adjustment target for follow-up compensation of the motion speed of the servo motor; and the actual speed data and the ideal movement speed change data are compared to determine the speed insufficient interval of the output shaft, so that the working current of the servo motor is adjusted, acceleration compensation is performed on the servo motor, the problem of abnormal operation speed caused by unstable placement of the servo motor is solved, and the operation stability of the servo motor is improved.

This invention discloses a control method, device, and system for suppressing current ripple in a coreless brushed DC motor, belonging to the field of DC motor control. The method includes: using an H-bridge Buck converter as the driving topology to provide smooth voltage; designing a state feedback controller based on its state-space model to adjust the dynamic current response; simultaneously designing nonlinear disturbance observers to compensate for matched disturbances in the inductor branch and unmatched disturbances and their derivatives in the capacitor branch; innovatively designing a multi-channel quasi-resonant proportional-integral resonant observer to observe and compensate for the unmatched periodic disturbances caused by motor component commutation, with higher precision; and finally synthesizing a composite control law to drive the motor. The device and system correspondingly implement the above method. Compared with higher-order disturbance observers, the multi-channel quasi-resonant proportional-integral resonant observer proposed in this invention significantly improves the compensation capability for unmatched periodic disturbances, effectively suppressing current ripple in the coreless motor and improving torque stability.

A gas turbine engine having a first pressure spool and a second pressure spool includes a power transfer system to transfer mechanical power between the first pressure spool and the second pressure spool. The first pressure spool can include a first electric machine to convert mechanical power from the first pressure spool to a first electric power. A coupled electric machine having a first coupled rotor and a second coupled rotor can be rotatingly coupled to the first pressure spool and the second pressure spool, respectively. The coupled electric machine is configured to receive an output power (e.g., an output power from an AC / AC converter) to drive a winding of the coupled electric machine to enable power transfer between the first pressure spool and the second pressure spool. An AC / AC converter can be electrically disposed between the first pressure spool and the second pressure spool.

The utility model discloses a rectification adjusting system for an excitation winding of an electric shovel direct current motor, a motor armature Hall current sensor inputs a collected main loop current signal of the electric shovel direct current motor to a CPU control board through a signal interface, and a data processing unit of the CPU control board performs data processing on the main loop current signal; a motor excitation Hall current sensor integrated in the CPU control board collects excitation current signals of an electric shovel motor and carries out data processing through a data processing unit. After data processing is completed, the CPU control panel controls the IGBT rectification circuit module to conduct rectification through the IGBT trigger circuit, the IGBT rectification circuit module is made to conduct sectional type excitation current control in an excavation mode and a descending mode respectively, the purpose of saving electric energy with the best characteristics is achieved, and remote real-time transmission is conducted through the 5G module.

The invention provides a control device capable of improving control accuracy at low cost. The control device is provided with: a prescribed value information storage unit that stores, as prescribed value information, a prescribed value that defines the oscillation frequency of the synchronization signal generated by the command device; a clock signal generation unit that generates a clock signal having a predetermined oscillation frequency; a measured value information acquisition unit that acquires, as measured value information, a measured value obtained by measuring the oscillation frequency of the synchronization signal transmitted from the command device, on the basis of the clock signal; a correction value calculation unit that calculates, on the basis of the prescribed value information and the measured value information, a correction value for correcting the command value information transmitted from the command device; a command value information acquisition unit that acquires command value information indicating a command value for a control object from a command device; a corrected command value calculation unit that calculates a corrected command value obtained by correcting the cycle of the command value information on the basis of the correction value; and a control unit that controls the driving of the control object on the basis of the corrected command value.

The invention relates to an electric tool (1), in particular a hand-held electric tool, e.g. a polisher (1A), a grinder and / or a saw (1B), comprising a tool (2), an electric motor (3) for driving the tool (2), and a control unit (4) for controlling the electric motor (3), the electric tool (1) being designed to be connected to a mains voltage (V1) and comprising a rectifier assembly (12) with a DC link (15) for supplying a DC link voltage (V2) on the basis of the mains voltage (V1), wherein the DC link voltage (V2) includes a plurality of successive voltage half-waves (16), and the control unit (4) is configured to provide, for each voltage half-wave (16), a torque half-wave (36) for controlling the electric motor (3), the shape of the torque half-wave (36) being flatter than the shape of the voltage half-wave (16).

Provided is an electrical machine that includes first machine terminals electrically connectable to first loads and second machine terminals electrically connectable second loads. A stator of the electrical machine includes first stator coil groups, each first stator coil group defining a stator phase and having interconnected first stator coils, and second stator coil groups, each second stator coil group defining a stator phase and having interconnected second stator coils. A power electronic switching assembly that includes first switching module assemblies electrically connected to or between the first machine terminals and second switching module assemblies electrically connected to or between the second machine terminals. Each first switching module assembly includes interconnected first switching modules. Each first switching module is electrically connected to a first stator coil group. Each second switching module assembly includes interconnected second switching modules. Each second switching module is electrically connected to a second stator coil group.

This invention discloses a method for calculating the back electromotive force (EMF) of a multi-element winding in a hollow cup armature brushed motor and a motor system thereof. The method includes: obtaining the parameters of a parallel magnetized permanent magnet and calculating the fundamental amplitude of the radial air gap magnetic flux density; obtaining the winding parameters and calculating the flux amplitude linked by a single-turn coil rotating in a magnetic field; calculating the back EMF amplitude per unit element based on the total number of turns and elements, and the coil rotation angular velocity; and vector-combining the back EMF generated by each element according to the electrical angle of the back EMF generated by each element to obtain the magnitude of the synthesized back EMF of the entire coil winding; integrating the waveform of the back EMF based on the magnitude of the back EMF amplitude and the number of commutations of the motor to obtain the average value of the motor's back EMF and the constant value of the motor's back EMF. This invention obtains the analytical formula for calculating the radial air gap magnetic flux density and the fundamental amplitude of the radial air gap magnetic flux density by analyzing the magnetomotive force and air gap permeability, ensuring the accuracy of the motor's back EMF calculation.

The invention relates to a predictive torque management method comprising the following steps: selecting a torque range having an upper boundary torque and a lower boundary torque, the upper boundary torque being selected to be higher than an optimal torque and / or the lower boundary torque being selected to be lower than the optimal torque, the optimal torque is the torque with the lowest oil consumption at a certain engine rotating speed during engine operation; and performing engine torque limiting based on the torque range wherein the engine torque is limited to an upper boundary torque when the torque demand exceeds the upper boundary torque; the engine torque is limited to zero when the torque demand is below the lower boundary torque.

This invention belongs to the field of cooling technology, and particularly relates to a temperature measurement and automatic cooling system for power distribution rooms, including a cooling device and a control device. The cooling device includes a housing with a connecting component on it, and an exhaust fan mounted on the connecting component. One side of the housing is open, and the other side has a circular through hole, with a temperature sensor installed inside. The connecting component includes a mounting platform located at the center of the circular through hole and connected to a vortex ring. A fixing ring is provided at the top, with a first groove on its lower surface that fits against the vortex ring. One end of the fixing ring is inside the circular through hole, and the other end is outside. A first reinforcing plate is provided at the upper end of the fixing ring, and a second reinforcing plate is provided at the lower end of the vortex ring. A second groove is provided on the upper surface of the second reinforcing plate that fits against the vortex ring. The first reinforcing plate is located inside the circular through hole, and the second reinforcing plate has the same dimensions as the first reinforcing plate. This system can reduce resonance, lower the failure rate of the exhaust fan after long-term use, increase the service life of the exhaust fan, and improve the cooling effect of the power distribution room.

According to the embodiment of the invention, the motor driver comprises a first channel module, a second channel module and a switch module connected between the first channel module and the second channel module, wherein the switch module is used for starting the first channel module and the second channel module according to level signals output by the micro-control unit to form corresponding current channels, and for different level signals, the first channel module forms different current channels, and the second channel module forms different current channels; and the first channel module and the second channel module are used for cooperating with an upper machine controller and sending pulse signals to the micro-control unit through corresponding current channels of the first channel module and the second channel module, so that the micro-control unit controls the movement of the motor according to the pulse signals. The motor driver as provided in the present invention is compatible with single-ended PTI signals of different voltages.

The utility model relates to a voice coil motor of a die bonder, in particular to a drive and current detection circuit for the voice coil motor of the die bonder, which comprises an isolation optocoupler circuit and a circuit for isolating and protecting a control signal sent by an MCU (Microprogrammed Control Unit) from the voice coil motor. The DAC module is used for programming input voltage, digitally controlling the voltage of the voice coil motor so as to control the current of the voice coil motor, and inputting the output voltage to the precise operational amplifier circuit; the precise operational amplifier circuit is used for conditioning the output voltage of the DAC module by taking a reference source as a reference voltage and inputting the output voltage to the power driving circuit; the power driving circuit is used for providing voltage suitable for driving for the voice coil motor according to the output voltage of the precise operational amplifier circuit and the current of the voice coil motor; according to the technical scheme provided by the utility model, the defects that the output stability of the voice coil motor is poor and the current of the voice coil motor is difficult to effectively and quantitatively detect in the prior art can be effectively overcome.

Device for driving electric vehicles / means of transport according to the principle of the series-wound / double-wound motor, characterized in that the commutation / reversal of the current is carried out by electronic semiconductor switches / circuits.