371results about "Field or armature current control" patented technology

The invention relates to the technical field of electric tool control, in particular to a motor control method of a target electric tool and a motor control circuit executing the motor control method, and the method comprises the steps: obtaining peak current at a detection resistor and a current PWM signal duty ratio, calculating real-time average current according to the peak current and the current PWM signal duty ratio, and comparing the real-time average current with an average current threshold value; and adjusting the duty ratio of the PWM signal according to the result, and outputting the PWM signal to drive the motor according to the adjusted duty ratio. By dynamically adjusting the duty ratio, the stability and safety of the electric tool under high load are effectively improved, the operation experience is optimized, the hardware upgrading requirement can be met, and the use bottleneck is broken through.

The invention relates to a motor control technology, and discloses a current sampling method of a DC brush motor, electromechanical equipment and a storage medium, and the method comprises the steps: configuring a plurality of sampling points in a single carrier period of a PWM signal; controlling the started DC brush motor to operate based on the configured PWM signal; carrying out multi-point sampling of carrier period synchronization on the motor current based on an ADC (Analog to Digital Converter) sensor; automatically storing the sampled data into a buffer area based on DMA (Direct Memory Access); when it is detected that the buffer area is full, sampling interruption is triggered, and current data of the buffer area are read for filtering processing; the filtered current data are input into a current loop PID controller, and the duty ratio of a PWM signal is adjusted; and based on the adjusted PWM signal, returning to execute the step of controlling the started DC brush motor to operate based on the configured PWM signal. The invention further discloses a control device. The invention aims to improve the current sampling precision of the DC brush motor, and further improve the control response speed and stability of the system.

The invention discloses a power plant direct-current oil pump motor control loop low-oil-pressure self-starting pressing plate adjusting system, particularly relates to the field of direct-current oil pump pressing plate adjustment, and comprises a pressing plate state monitoring module, a working condition decision module, a soft start execution module, a hard start straight-through module and a transient protection module. According to the low-oil-pressure self-starting pressing plate adjusting system of the power plant direct-current oil pump motor control loop, forced locking is achieved through the pressing plate state monitoring module when a pressing plate does not exit, and the risk that an armature winding bears full-pressure impact and counter electromotive force impact when an IGBT is not ready is avoided; soft start and hard start are distinguished through the working condition decision module, and response delay of a single soft start strategy in an emergency is avoided; the IGBT conduction angle climbing rate is dynamically adjusted through a PID control algorithm by means of a soft start execution module, a programmable timer controls time sequence switching of a contactor, smooth progressive climbing of motor current is achieved, bus voltage is stabilized, and current impact and back electromotive force influence in the starting process are reduced.

The invention discloses an energy-saving control method for a new-energy high-low-voltage direct-current relay. The energy-saving control method comprises the steps of analyzing a mapping relation between a silicon steel sheet stacking angle and a magnetic flux path deviation, calculating magnetic domain wall moving resistance according to magnetic domain boundary stress, determining a magnetic domain overturning speed by combining a magnetic field change rate, and measuring a hysteresis loop width parameter. Adjusting the width and frequency of the excitation current pulse according to the magnetic domain overturning frequency and the hysteresis loop offset and width to obtain an optimized excitation current pulse sequence, and determining the hysteresis loop expansion speed according to the hysteresis loop area change rate; the local high-temperature area temperature is analyzed through the iron core temperature rise rate, the local high-temperature area distribution and the magnetic domain energy dissipation data, if the local high-temperature area temperature exceeds the preset threshold value, the excitation current pulse is adjusted, stable iron core temperature rise control data is obtained, the coercive force change amplitude is determined, the magnetic hysteresis loss and the temperature rise are reduced, the stability of the relay under high-frequency switching is improved, and the reliability of the relay is improved. And the operation efficiency and reliability of the system are greatly improved.

A method for controlling a DC brush motor includes: determining a speed difference signal based on a difference between a speed command signal and a motor speed; determining an initial voltage command based on the speed difference signal; determining a final voltage command based on the initial voltage command; applying a DC voltage based on the final voltage command to cause the DC brush motor to rotate a lead screw and move a load along a path; determining a disturbance torque; and compensating for the disturbance torque by at least one of: determining a feedforward voltage command based on a position of the load along the path and determining the final voltage command as the sum of the initial voltage command and the feedforward voltage command;or determining a speed compensation signal based on the disturbance torque and determining the speed difference signal further based on the speed compensation signal.;

The invention relates to the technical field of motor performance evaluation, in particular to a permanent magnet direct current pump motor performance evaluation method and system based on cloud computing. Comprising the steps of obtaining current waveform data and vibration waveform data, and obtaining a first criterion based on the current waveform data and the vibration waveform data; obtaining a second criterion according to the vibration waveform data; obtaining a third criterion according to the vibration waveform data; obtaining a fourth criterion according to the current waveform data and the vibration waveform data; judging the causal correspondence between the current step and the output change of the control loop to obtain a fifth criterion; continuously observing the change trend of high-frequency components in the vibration waveform data to obtain a sixth criterion; based on the first criterion, the second criterion, the third criterion, the fourth criterion, the fifth criterion and the sixth criterion, obtaining a classification result; and confirming measures according to a classification result. The problems of repeated false alarm, invalid maintenance and system reliability evaluation deviation caused by the fact that a permanent magnet direct current pump motor performance evaluation system cannot distinguish real mechanical faults under a low-speed cruise working condition in the prior art are solved.

The utility model discloses a motor rotating speed adjusting structure of an ice cream machine, which belongs to the technical field of ice cream machines and comprises a compressor, an evaporator, a stirrer, a motor, a control panel and a display panel. The control panel is in electric control connection with the compressor, the motor and the display panel, an adjustable direct-current voltage circuit is arranged on the control panel, different voltage signals are output through the adjustable direct-current voltage circuit, and the motor is controlled to output different rotating speeds through the different voltage signals. According to the structure, the motor can at least rotate at a high speed and a low speed, so that the stirrer can stir ice cream at least at a high rotating speed and a low rotating speed, the stirring speed of the ice cream can be increased by the stirrer rotating at a high speed, the discharging speed of the ice cream can be reduced by the stirrer rotating at a low speed, and the use experience of a user is greatly improved.

The invention discloses an active and passive mode conversion system and method suitable for active and passive rehabilitation training. The system comprises a current collector, an encoder, a motor driver, a direct current motor and a main controller. The motor driver obtains the real-time current and the output real-time rotating speed of the direct current motor according to the output signals of the current collector and the encoder; the main controller determines the active / passive intention or spasm condition of a current user according to the real-time current, the real-time rotating speed information and the speed value information set by the user, calculates a driving instruction and sends the driving instruction to the motor driver; the torque self-adaption driving device is used for driving the direct-current motor to adaptively carry out dynamic switching of active / passive states or enter a spasm protection program through double closed-loop control timely output torque. The method has the effects that the rigidity of the direct-current motor is large in the passive mode when the rotating speed of the motor is smaller than the expected value, the resistance of the motor is adjustable in the active mode when the rotating speed is higher than the expected value, and active and passive intention recognition and spasm detection can be carried out.

Technical solutions for diagnosing a sensor fault in an actuator incorporating a permanent magnet direct current (PMDC) motor are described, including: measuring, by means of a position sensor, the position of the PMDC motor; determining, based on the measured position, an estimated motor speed; measuring, by means of a current sensor, the current in the PMDC motor; determining, based on the measured current in the PMDC motor, a voltage command for the PMDC motor; determining, based on the measured current and the voltage command and using a motor speed observer, an observed speed of the PMDC motor; determining a differential speed as the difference between the estimated motor speed and the observed speed; determining, based on the differential speed, the sensor fault; and performing an action in response to the determination of the sensor fault.

The invention provides a headlamp position adjusting system based on ripple waves of a brush direct-current motor. The headlamp position adjusting system comprises a whole vehicle height sensor and a steering angle sensor, wherein the whole vehicle height sensor and the steering angle sensor are used for collecting vehicle height and steering data in real time; the MCU control unit receives data of the whole vehicle height sensor and the rotation angle sensor and calculates the number of target rotation turns of the motor and the number of corresponding ripple pulses; the motor driving unit drives the brush direct current motor to operate; the current acquisition circuit acquires a ripple signal in the running current of the motor; the direct-current filter circuit filters direct-current components in the current signals; the ripple amplifying circuit amplifies the filtered alternating current ripple signal; and the ripple conversion circuit converts the amplified ripple signal into a pulse signal which can be identified by the MCU. The brush direct current motor is adopted to replace a traditional stepping motor, a drive circuit only needs a single full bridge, and the hardware cost is reduced by about 50%; a control circuit and a shielding wire harness in the motor are omitted, and the number of wire harnesses and connectors and the manufacturing cost are reduced.

As first aspect provides, in an electronic control circuit, a method of controlling an electromotor of an actuator for controlling a position of an actuatable object of a vehicle. The method comprises receiving an instruction to hold position of the actuatable object, obtaining an initial hold voltage pattern for the electromotor and applying the initial hold voltage pattern to the electromotor. The method further comprises determining movement data on movement of the actuatable object, determining an adjusted hold voltage pattern based on the movement data and applying the adjusted hold voltage pattern to the electromotor. By applying a particular voltage to the electromotor—stator, rotor or both, depending on the type—, a magnetic force between rotor and stator may be created to counteract any external force. The voltage applied for holding the stator is determined on detection of any movement of the rotor.

The present application discloses a motor control circuit, a motor control chip, and a motor control system. The motor control circuit comprises a boost-buck controller, a motor gate driver, a first switch transistor, a second switch transistor, and a third switch transistor. When detecting that a charging device is inserted and receiving a request for entering a driving working mode, the boost-buck controller controls the second switch transistor and the third switch transistor to charge a battery and distribute a power supply current to a motor; further, when detecting that the charging device is inserted and receiving a charging instruction signal, the boost-buck controller controls the second switch transistor and the third switch transistor to step down the voltage at a system voltage node to a target step-down voltage; in addition, when detecting that no charging device is inserted and receiving the request for entering the driving working mode, the boost-buck controller turns off the first switch transistor, and controls the second switch transistor and the third switch transistor to step up the voltage at the system voltage node to a target step-up voltage.

The invention provides an air energy heat pump direct current motor intelligent speed regulation method and system based on self-adaptive fuzzy control. The method comprises the steps of obtaining original operation data; extracting dynamic characteristics of a short-time window from the original operation data set, and calculating to obtain a thermal load trend index; constructing a fuzzy controller, wherein the fuzzy controller comprises fuzzification, rule reasoning and defuzzification output; in the fuzzification, a thermal load trend index is mapped into a five-level fuzzy level by adopting a triangular membership function; combining the thermal load trend index with an operation mode to calculate a target wind speed; and the target wind speed is converted into a control signal, feedback data is collected after each regulation and control period is finished, a performance deviation index is constructed based on the feedback data, and correction parameters are output. According to the invention, a resonance frequency point avoidance mechanism and a voltage margin correction strategy are embedded, so that the system is kept stable, low in noise and high in efficiency under high-speed, low-speed or medium-speed operation conditions.

The utility model relates to the technical field of motor speed regulation, in particular to a direct current motor speed regulation circuit. The speed regulation circuit comprises an input connector CON1 used for accessing a DC input voltage; the output connector CON2 is used for connecting a direct current motor; the step-down chip ME3148 is used for converting the direct-current input voltage into adjustable output voltage, and the step-down chip comprises a VI N pin 8, an SW pin 2, an FB pin 4, a VC pin 7, a CS pin 5 and a GND pin 3. The direct-current motor speed regulation control circuit is simple in structure, can realize wide-range and high-precision speed regulation control only by adjusting a single potentiometer, has the characteristics of low cost and high reliability while ensuring the speed regulation performance, and is suitable for direct-current motor control scenes with higher requirements on speed regulation range and precision.

A single-wire control device for brushless DC (BLDC) motor is disclosed, applicable to the usage between a controller and a pre-drive stage of the BLDC motor, including an encoding modulation unit, a transmission wire, and a demodulation decoding unit; wherein, the encoding modulation unit is connected to the controller to receive a plurality of control signals from the controller, and encodes and modulates the control signals to generate a modulated signal; the transmission wire is connected to the encoding modulation unit for transmitting the modulated signal to the demodulation decoding unit; the demodulation decoding unit is connected to the transmission wire for receiving, demodulate and decoding the modulated signal to generate the original control signal, which is then passed to the pre-driver stage.

The utility model discloses a driving circuit, an electric toothbrush body and an electric toothbrush, the driving circuit comprises a first switch circuit and a second switch circuit, the input end of the first switch circuit is connected with a battery, and the output end of the first switch circuit is respectively connected with the input end of the second switch circuit and a first electrode of a motor; the output end of the second switching circuit is grounded; the input end of the third switching circuit is connected to the battery, the output end of the third switching circuit is connected with the input end of the fourth switching circuit and the second electrode of the motor, and the output end of the fourth switching circuit is grounded; the main control circuit is respectively connected with the controlled end of the first switching circuit, the controlled end of the second switching circuit, the controlled end of the third switching circuit and the controlled end of the fourth switching circuit; the electric toothbrush aims at solving the technical problem that an existing electric toothbrush is single in movement mode.

Method for controlling the operation of an electromechanical actuator, associated electromechanical actuator and occultation device comprising such an actuator The invention relates to a method for controlling the operation of an electromechanical actuator comprising an electric motor controlled in response to a command (Cmd) by a motor voltage (V_mot), as a function of a bus voltage value (Vbus).The method comprises the following steps: monitoring (E10) the amplitude of a current (Imot) flowing through the motor; determining (E20) a maximum permissible motor voltage threshold value (Vmot_max) for the motor as a function of the amplitude of the current (Imot) flowing through it and a predetermined maximum power threshold value (Pmax); limiting (E40) the motor voltage value to the maximum motor voltage threshold value if the motor voltage value reaches or exceeds the maximum motor voltage threshold value (Vmot_max) and maintaining the motor voltage value at the corrected motor voltage value (Vmot_cor) if the motor voltage value is lower than the maximum motor voltage threshold value. Figure for abstract: Fig 4.

This prevents malfunctions caused by negative voltage. [Solution] The semiconductor device 10 includes, for example, a connection terminal BR, a ground terminal GND, a pull-down circuit 13 that conducts between the connection terminal BR and the ground terminal GND, and a cutoff circuit 30 that cuts off the current path from the ground terminal GND to the connection terminal BR via the pull-down circuit 13 when the voltage of the connection terminal BR is lower than that of the ground terminal GND.

The invention discloses a high-performance motor driving method based on a motor control algorithm, and the method comprises the steps: carrying out the power connection, inputting a power supply, determining a current requirement according to a motor load, connecting a motor, accessing a communication interface, opening a project directory, entering a development environment, compiling a project, adding a motor control algorithm, burning a program, and carrying out the software burning and communication burning. LIN interface connection is carried out, correct connection is ensured, a corresponding control instruction is sent, instruction format description is carried out, a motor is controlled, electrical parameters during motor control are monitored in real time, and resistance, voltage and capacitance are monitored. According to the high-performance motor driving method based on the motor control algorithm, the MCU is matched with the direct-current brush motor, position detection is carried out through the Hall sensor, the motor control algorithm is input, burning is carried out through LIN communication, multiple working modes are supported, and the high-performance motor driving method has the advantages of being high in precision, high in efficiency and high in reliability.

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.

This application relates to an electronic valve control method, apparatus, computer equipment, and storage medium. It includes: determining the electronic valve supply voltage of a target electronic valve, and determining a filtered supply voltage for the target electronic valve based on the electronic valve supply voltage; adjusting the target supply voltage of the target electronic valve based on the filtered supply voltage and the brushed motor supply voltage of the target electronic valve; and controlling the operation of the motor in the target electronic valve based on the target supply voltage. This solution determines the desired supply voltage of the target electronic valve, i.e., the target supply voltage of the target electronic valve, based on the electronic valve supply voltage and a pre-set brushed motor supply voltage, avoiding the resource waste caused by directly controlling the motor operation of the target electronic valve based on the electronic valve supply voltage, and reducing resource consumption during the operation of the electronic valve.

The application discloses a kind of wall breaking machine driving motor AC-DC conversion circuit, belong to conversion circuit technical field, comprising: power input connector is connected with low-loss synchronous rectifier bridge by synchronous rectification controller;Low-loss synchronous rectifier bridge is connected with PWM controller, wall breaking machine driving motor control subcircuit respectively;Wall breaking machine driving motor control subcircuit further includes across wall breaking machine driving motor's first sampling resistance and second sampling resistance, to carry out voltage sampling to wall breaking machine driving motor, output voltage sampling signal;Low-loss synchronous rectifier bridge and PWM controller are connected with wall breaking machine driving motor control subcircuit by switch MOSFET;PWM controller is used to control the duty cycle of switch MOSFET according to voltage sampling signal;PWM controller maintains the stability of wall breaking machine driving motor DC input voltage by adjusting duty cycle, to avoid wall breaking machine driving motor under different loads appears overvoltage or under voltage.

To enable a control device to contain a dispelling range within an intended range by controlling overrun by relatively simple control in a wiper system.SOLUTION: A control device (100) comprises a drive unit (110) which oscillates a wiper arm (3) by turning a revolving shaft (4) by supplying electric power to a motor (5) and a control unit (120) which controls the drive unit and then switches from a first mode in which the angular velocity of the revolving shaft is set at a first speed to a second mode in which the angular velocity of the revolving shaft is set at a second speed in a first time point before a first period from a reverse time point when the wiper arm reaches a reverse position and switches from the second mode to the first mode in a second time point before a second period shorter than the first period from the reverse time point.SELECTED DRAWING: Figure 4

The embodiment of the invention provides a driving device which comprises three phases of bridge arms, each phase of bridge arm comprises an upper switch tube and a lower switch tube which are connected in series, the source end of the upper switch tube is connected to a power supply voltage end, and the drain end of the lower switch tube is connected to a grounding end through a sampling resistor. The drain end of the upper switch tube is connected with the source end of the lower switch tube and is used for being connected to a motor, and the gate end of the upper switch tube and the gate end of the lower switch tube are used for receiving control signals; at least one first capacitor is connected between the source end of the upper switch tube and the drain end of the lower switch tube.

A decompression system includes: an electric pump configured to decompress a primary-side space with respect to a secondary-side space; and a control device configured to control a motor of the electric pump, wherein the control device includes: a torque command generation unit configured to generate a torque command to operate the motor in accordance with an operation command; a limiter configured to limit the torque command to a limit value or less; a power conversion circuit configured to generate driving power corresponding to the torque command passed through the limiter and supply the driving power to the motor; and a limit changing unit configured to temporarily increase the limit value in response to opening of the decompressed primary-side space with respect to the secondary-side space.

The application relates to the technical field of motor driving control, in particular to a diagonal synchronous PWM control method and system for an H-bridge motor, which can simplify control logic, reduce dependence on MCU resources, improve low-speed performance, and improve the reliability of the system; a pulse width modulation signal and a direction control signal are acquired, wherein the direction control signal is used for indicating a target current direction; when the direction control signal indicates a first direction, the switching states of a first upper tube and a second lower tube of the H-bridge are controlled to be synchronous with the pulse width modulation signal, and the switching states of a first lower tube and a second upper tube are controlled to be synchronous with a complementary signal of the pulse width modulation signal; when the direction control signal indicates a second direction opposite to the first direction, the switching states of the first upper tube and the second lower tube of the H-bridge are controlled to be synchronous with the complementary signal of the pulse width modulation signal, and the switching states of the first lower tube and the second upper tube are controlled to be synchronous with the pulse width modulation signal.

The invention discloses a high-precision linear motion direct-current driving system for spaceflight and a control method of the high-precision linear motion direct-current driving system, and relates to the technical field of spacecraft attitude driving control. The high-precision linear motion direct current driving control method for spaceflight comprises the steps of linear direct current motor response aging judgment, spacecraft driving load evaluation and spacecraft driving signal optimization. According to the method, the driving load influence evaluation requirement is determined through command signal response timeliness judgment, if the driving load influence evaluation requirement does not exist, the spacecraft attitude adjustment process continues to be monitored, otherwise, the driving load optimization requirement continues to be determined, and finally if the driving load optimization requirement exists, the oscillation signal influence quantification requirement continues to be determined. Otherwise, the oscillation signal optimization requirement is directly determined after the oscillation signal influences quantification, the spacecraft linear motion direct current driving stability is improved, and the problem that in the prior art, spacecraft linear motion direct current driving is not stable due to the spacecraft attitude adjustment load requirement difference is solved.

The invention discloses a rotary excitation current control circuit, which belongs to the field of automatic control systems and mixed signal integrated circuits, and is characterized in that current flowing through an H bridge must flow through a resistor Rshunt, an amplifier circuit A amplifies voltage at two ends of the resistor Rshunt, a peak detection circuit detects the maximum voltage within a period of time, and the peak detection circuit detects the maximum voltage within a period of time. The ADC quantizes peak voltage in a period of time and quantizes temperature voltage transmitted by the temperature sensor in another period of time, the peak voltage quantized by the ADC adjusts the amplitude of sine waves through a PID algorithm, so that the duty ratio of SPWM waves is changed, connection or disconnection of M1, M2, M3 and M4 is controlled after H-bridge driving, the rotating excitation current peak value is controlled, in addition, the ADC quantizes the temperature voltage in another period of time, and the rotating excitation current peak value is controlled. The real-time temperature is sent to the digital control circuit, and the digital control circuit sends a proper control code to each module according to the current temperature, so that each part in the system is not influenced by the temperature as far as possible.

The application provides a H-bridge motor driver with adjustable same-bridge interlocking dead time, which has the advantages of small circuit loss, no same-bridge arm conduction of the H-bridge circuit, small product volume and adjustable dead time function.

The invention discloses a three-phase full-bridge series motor driving system based on bypass switches, which comprises a three-phase full-bridge motor control circuit, each phase of full-bridge control circuit of the three-phase full-bridge motor control circuit is provided with a parallel bypass, a switch module Pa is connected in series with a current-limiting resistor Ra to form an A-phase bypass, a switch module Pb is connected in series with a current-limiting resistor Rb to form a B-phase bypass, and the A-phase bypass and the B-phase bypass are connected in parallel. The switch module Pc is connected in series with the current-limiting resistor Rc to form a C-phase bypass, and in the operation process of the motor, the bridge arm dead zone time is set when the winding current is commutated by each phase of full bridge; the invention relates to the technical field of motor driving systems, through a bypass switch module, a bypass switch is turned on within the dead zone time of any phase of bridge arm, current paths of the other two phases of windings are maintained, torque sudden change caused by instantaneous power failure is effectively avoided, and compared with a traditional dead zone scheme, remarkable improvement is achieved. And the stability and precision of motor operation are greatly improved, the energy utilization efficiency is improved, heating of equipment is reduced, and the service life of the equipment is prolonged.