184results 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 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.

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 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.

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.

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.

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 utility model discloses a ground starting device which comprises a frame, an upper box body, a steering gear, a trolley front axle, a trolley rear axle, a direct current power supply module, a brushless direct current motor control module and a ground starting control module, the upper box body is arranged on the frame, the steering gear is arranged on the frame, and the steering gear is used for steering. The car front axle is arranged on the lower side of the car frame and connected with the car frame and the steering gear, the car rear axle is arranged on the lower side of the car frame and connected with the car frame and the car front axle in a matched mode, the direct-current power module is arranged in the upper box body, the brushless direct-current motor control module is arranged in the upper box body, and the ground starting control module is arranged in the upper box body. The direct-current power supply module is connected with the brushless direct-current motor control module and the ground starting control module respectively, and the direct-current power supply module is used for supplying power to the brushless direct-current motor control module and the ground starting control module. The utility model has the advantages of fast response speed, environmental protection, no pollution and the like.

The application provides a direct-current brush motor starting control method and related equipment, and the method comprises the following steps: sampling the current value of the motor at a preset position of the high level of each cycle of a pulse width modulation signal to obtain a sampling current value, wherein the pulse width modulation signal is a starting signal sent by a starting circuit of the motor; adjusting the pulse width of the pulse width modulation signal according to the sampling current value, and stopping increasing the pulse width of the pulse width modulation signal in the case that the sampling current value is greater than or equal to a preset safe starting current threshold, wherein the current value of the motor dynamically changes with the pulse width of the pulse width modulation signal. Therefore, the pulse width of the PWM signal during starting can be controlled by judging the size of the current value of the motor, the current value of the motor can be periodically sampled, and the reasonable motor starting current can be determined in a gradual form, so that the starting current of the motor is effectively limited and reduced.

The invention discloses a method, a device and a system for controlling a brush motor. The method comprises the following steps: acquiring a target distance of target equipment moving from an initial position to a target position; calling a preset trajectory generation algorithm to process the target distance to obtain an expected position sequence, an expected speed sequence and an expected acceleration sequence; acquiring real-time current of the brush motor, and generating a real-time control signal of the brush motor according to the real-time current, the expected position sequence, the expected speed sequence and the expected acceleration sequence; and controlling the brush motor to move according to the real-time control signal so as to drive the target equipment to move. According to the method, the target distance is converted into the expected position sequence, the target distance is discretized into the smooth track, sudden change is avoided, the operation stability is improved, the real-time current of the brush motor is added in the generation of the real-time control signal, the real-time control signal can be dynamically generated according to the real-time load state of the brush motor, and the response capability is improved.

The invention discloses a motor control method based on H-bridge driving and related equipment, relates to the technical field of motor control, and discloses a motor control method based on H-bridge driving, comprising: acquiring a first current of a corresponding load of a target motor driving circuit at a previous sampling moment; predicting a current symbol of a corresponding load of the driving circuit at the current sampling moment through a preset current prediction algorithm model based on the first current at the previous sampling moment; determining a target load current of the driving circuit at the current sampling moment based on the current symbol at the current sampling moment; and controlling the driving circuit based on the target load current. According to the invention, the real direction of the load current and the target load current are determined through a software algorithm instead of adding an external sampling circuit, so that the hardware cost of the driving motor is reduced.

A motor drive controller for driving a brushless direct current motor includes a motor drive unit; a magnetic sensor for detecting a magnetic field generated by rotation of the motor and outputting the magnetic field as each of magnetic signals; and a bias adjuster for adjusting and outputting a bias voltage used in magnetic field detection by the magnetic sensor. The bias adjuster adjusts the bias voltage to a second voltage value lower than a first voltage value that allows the magnetic sensor to detect the magnetic field in a first period after a phase change of the magnetic signals. The bias adjuster also adjusts the bias voltage to a first voltage value in a second period from an end of the first period until a subsequent phase change of the magnetic signals.

The invention discloses a novel auxiliary control system of a gas water heater. The novel auxiliary control system comprises a direct current motor and an auxiliary control panel, the auxiliary control board comprises an AC-to-DC unit, a DC motor control unit and a protection switch signal output unit. The AC-to-DC unit is used for converting an input 220V AC power supply into DC and supplying the DC to the DC motor control unit; the direct current motor control unit is used for controlling rotation of the direct current motor and monitoring the running state of the direct current motor, and the MCU drives the direct current motor in a constant-current mode and conducts high-dynamic-response motor rotating speed closed-loop control. The auxiliary control system of the gas water heater is formed only by replacing an alternating-current motor with a direct-current fan, cancelling a wind pressure switch and assembling an auxiliary control panel under the condition that the whole structure and the main control system of the existing alternating-current gas water heater are not changed, so that the fault rate of the gas water heater is reduced, the performance is more stable, and energy is saved; and meanwhile, the wind pressure resistance of the fan is enhanced.

The utility model discloses a novel control system for an AC voltage-stabilized power supply. The novel control system comprises a master control MCU module, a DC motor control circuit, a signal measurement circuit, a power conversion circuit, a man-machine interaction module, a communication module, a storage module and a protection module. The master control MCU module is connected with the signal measuring circuit, the man-machine interaction module, the communication module and the storage module through an SPI bus. The direct current motor control circuit adopts a full-bridge topological structure, is connected with the main control MCU module through an optical coupling isolator, and receives a PWM signal to control the positive and negative rotation and rapid braking of a motor; the power conversion circuit adopts a two-stage voltage reduction structure, the voltage of the first stage is reduced to 8V from + 12V, and the output of the second stage is 5V and 3.3 V. According to the utility model, a full-bridge topological structure and a + 12V single power supply are adopted for power supply, flexible forward rotation, reverse rotation and rapid braking control are realized, and the dynamic response capability of the system is improved.

This invention relates to the field of motor control technology and discloses a sensorless brushed DC motor control method. The method includes calculating the optimal tracking angle of the control panel and obtaining the current angle of the control panel; acquiring the current signal of the brushed DC motor through a ripple current conversion circuit, converting the current signal into a PWM pulse signal and inputting it to an MCU; the MCU counting the number of ripples per unit time and calculating the motor speed based on the number of ripples; controlling the brushed DC motor to start running based on the current angle and the optimal tracking angle of the control panel; during the operation of the brushed DC motor, calculating the optimal stopping angle based on the motor current and motor speed, while simultaneously acquiring the current angle of the control panel in real time, and controlling the brushed DC motor to stop running when the current angle of the control panel reaches the optimal stopping angle. The advantages of this invention are that it can achieve precise speed control of a brushed DC motor without sensors and effectively reduce implementation costs.

A device for the regulation of devices which can be regulated with a 0-10 Vdc and / or PWM command is herein disclosed, the device having at least one power supply input, at least one regulation input adapted to receive external regulation signals, a potentiometer comprising a selector element, the potentiometer being configured to provide a manual voltage regulation, and at least one command output configured to output a command signal towards the devices to be regulated. The device further comprises a switching element configured to cause a switching of said device between a first regulation mode, in which the command signal is generated by said device and is manually adjustable through the selector element of said potentiometer, and a second regulation mode, which allows a regulation of the devices to be regulated via the command signal from the command output based on an external device connectable to the regulation input. A system comprising the above device is also disclosed.

The invention discloses a motor control method, device and system of a photovoltaic tracking support and a storage medium. The method comprises the steps that motor parameters of a motor and transmission parameters of a transmission mechanism are obtained, the motor parameters at least comprise the Hall pulse number corresponding to the unit rotation angle of the motor, and the transmission parameters at least comprise the transmission ratio between a motor output shaft and a torque tube; based on the Hall pulse number and the transmission ratio corresponding to the unit rotation angle of the motor, establishing a mapping relation between the rotation angle of the motor and the rotation angle of the torque tube, and based on the mapping relation, converting the target rotation angle of the torque tube into a target rotation angle of the motor and a target Hall pulse number corresponding to the target rotation angle of the motor; and obtaining a torque tube target rotation angle parameter, converting the torque tube target rotation angle parameter into an operation condition instruction including a motor target rotation angle and a target Hall pulse number according to the mapping relation, adjusting a driving parameter of the motor based on the operation condition instruction, and driving the motor to rotate. According to the invention, the accuracy of photovoltaic tracking support motor control can be improved.

The invention discloses a motor driver upper and lower tube logic interlock circuit, which comprises a first current-limiting resistor, a second current-limiting resistor and a triode, and is characterized in that the first current-limiting resistor and the second current-limiting resistor are connected in series between the PWM output of a motor driver and the input of a driving chip; the input end of the first current-limiting resistor is connected with a base electrode B of a triode through a first resistor, a collector electrode C of the triode is connected to the output end of a second current-limiting resistor, and an emitter electrode E of the triode is connected with a ground wire DGND. The circuit is simple and reliable, a complex sequential circuit is not needed, the logic interlocking function can be achieved through conduction of the triodes or not, the upper tube and the lower tube cannot be in high level, it is guaranteed that the driver power tube cannot be in a straight-through condition, the reliability of the driver power tube is improved, and the circuit is suitable for driver scenes using DSP, FPGA or CPLD devices.

The utility model belongs to the technical field of electric lifting, and discloses a self-locking circuit which is applied to a lifting system and comprises a power supply, a driving motor, a switch control unit and a steering control circuit. The power supply and the steering control circuit are respectively connected with the driving motor through the switch control unit, the steering control circuit is grounded, and the switch control unit is used for controlling the steering and / or locking state of the driving motor. Therefore, the driving motor can be self-locked during power failure through the switch control unit, the risk that personnel below are injured and articles are damaged due to the fact that the lifting system loses power and a platform or a borne object suddenly descends is avoided, meanwhile, the lifting system can maintain the original position, the whole lifting system still maintains the bearing capacity, and the safety of the lifting system is improved. And the reliability and the safety of the whole lifting system are improved.

An outdoor power tool and a method of operating the outdoor power tool are provided. The outdoor power tool includes a tool assembly, a drive assembly, a handle assembly, a control system comprising a control circuit, a first trigger and a second trigger. The first trigger and the second trigger are each electrically connected to the control circuit. The control system is configured to initiate supply of electric power to the drive assembly when an input is received at the control circuit from both the first trigger and the second trigger.

Power supply unit (10), comprising: an output semiconductor element (11) provided between a power supply line (Vcc) and an output terminal (OUT), and which is controlled and switched to supply electrical energy to an inductive load connected to the output terminal (OUT); and a clamping circuit (15) which clamps a voltage applied between the power supply line (Vcc) and the output terminal (OUT) due to a counter-electromotive force with respect to an operating reference voltage of the output semiconductor element (11), wherein: the counter-electromotive force is generated in the inductive load when the output semiconductor element (11) switches OFF, the output semiconductor element (11) consists of a semiconductor element with an insulated gate electrode that can switch high electrical energy, the clamping circuit (15) comprises a switching semiconductor element (14) and an operating voltage adjusting diode, the switching semiconductor element (14) is connected by a backflow blocking diode between a gate of the semiconductor element with insulated gate electrode and the power supply line (Vcc), and The operating voltage setting diode determines an ON operating voltage of the switching semiconductor element (14) with respect to the operating reference voltage of the semiconductor element with insulated gate electrode.

Simulated bog-down system and method for power tools. One power tool according to an example embodiment includes a power source and a motor selectively coupled to the power source. The motor includes a rotor and stator windings. The power tool includes an actuator configured to generate a drive request signal and a power switching network configured to selectively couple the power source to the stator windings of the motor. The power tool includes an electronic processor coupled to the power source, the actuator, and the power switching network. The electronic processor is configured to detect a load on the power tool and compare the load to a threshold. The electronic processor is configured to determine that the load is greater than the threshold, and to control the power switching network to simulate bog-down in response to determining that the load is greater than the threshold.