224results about "DC motor rotation control" patented technology

The invention relates to the technical field of direct current motor driving, and provides a high-speed direct current motor driving system which comprises a control module, a driving module and a feedback module and is based on an analog switch and an FPGA. By implementing the scheme, in the first aspect, the two sides of the direct current motor of the middle bridge arm of the full-bridge power circuit are each connected with a sampling resistor in series, and high-precision bidirectional current measurement of the direct current motor is achieved and the reliability of a driving system is improved through full-path detection and common-mode rejection under the condition that the power extension time and power consumption are not increased; and on the second aspect, the common-mode input voltage of the operational amplifier is relatively small through the use of the analog switch and the amplitude limiting diode, and the operational amplifier is not required to be limited by high common-mode voltage, so that the type of the operational amplifier with higher response speed can be selected. And thirdly, a fault detection unit and a redundancy check unit are arranged in the FPGA, and the safety and the reliability of the system are improved through cooperative work of the FPGA, a double-sampling resistor, an amplitude limiting diode and an analog switch.

The invention discloses a direct current motor control and automatic detection system and method, the system comprises an upper computer, a lower computer and a CAN bus communication unit, the upper computer comprises a calibration module, a position control module, a self-inspection module and a communication interface, and the calibration module is used for initiating an automatic calibration instruction and receiving and displaying a calibration result; the position control module is used for generating a target position instruction and receiving and dynamically displaying the real-time position of the motor; the self-checking module is used for initiating a one-key self-checking instruction and displaying a self-checking result; the lower computer comprises a main control chip, the main control chip is provided with an H-bridge driving circuit and an encoder acquisition circuit, the H-bridge driving circuit is used for driving the direct current motor to rotate forwards and backwards, and the encoder acquisition circuit is used for acquiring motor position signals; the CAN bus communication unit is connected with the communication interface of the upper computer and the main control chip of the lower computer through the USB to CAN module; according to the invention, faults can be automatically detected in the production and use processes of the DC motor, and the efficiency of production personnel and the product quality are improved.

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.

An electric apparatus includes: an electricity storage device; a rotary electric machine including an α-phase first coil and an α-phase second coil; and an electric power control unit that controls electric power transfer of each of the electricity storage device and the rotary electric machine. The electric power control unit includes: a first full-bridge circuit connected to both ends of the α-phase first coil; and a second full-bridge circuit connected to both ends of the α-phase second coil. When electric power is transmitted via the α-phase first coil and the α-phase second coil between the first full-bridge circuit and the second full-bridge circuit, the electric power control unit controls a phase difference between the first full-bridge circuit and the second full-bridge circuit in a range that includes 90° to 180°.

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.

The application discloses a control method of a scrubber booster wheel and the scrubber, a booster motor is connected to the booster wheel, the control method of the scrubber booster wheel comprises the following steps: judging whether the booster motor poles generate electric potential or not; if the booster motor poles generate electric potential, acquiring the electric potential direction; and controlling the booster motor to work according to the electric potential direction generated by the booster motor. According to the control method of the scrubber booster wheel, the user is provided with power assistance when operating the scrubber, the user is facilitated to operate, and the user's physical strength is saved. Meanwhile, no additional sensing device is needed, the structure is simplified, and the cost is reduced.

An integrated circuit (100A) includes an H-bridge circuit (102) having a first output node (OUT1) for coupling to the high-side terminal of an inductor (103) and a second output node (OUT2) for coupling to the low-side terminal of the inductor. A current-sensing FET (SNS-DRV) is coupled between a current source (110) and a lower supply voltage to provide a reference current (Itrip), including a peak current limit at the sensing node. A current-sensing comparator (104) has a first input coupled to the sensing node, a second input coupled to the second output node, and an output (113) coupled to send an output signal to a driver control circuit. A FET linearity detection circuit (112) is coupled to receive the gate voltage (LS2) of an active low-side power FET (Mls2) and has an output (CMP EN) coupled to enable the current-sensing comparator when the active low-side power FET operates in the linear region.

The invention discloses a motor forward and reverse rotation driving circuit and system, and the circuit comprises a reference voltage supply circuit which is provided with a reference voltage output end; the first reference voltage providing circuit is provided with a first reference voltage output end; the reference voltage output end and the first reference voltage output end are respectively connected with the first comparator circuit; wherein the reference voltage is gradually changed from the first reference voltage to the second reference voltage, the first reference voltage is located between the first reference voltage and the second reference voltage, so that the reference voltage is smaller than the first reference voltage in a first time period and larger than the first reference voltage in a second time period, and the first time period and the second time period are not overlapped; and the first comparator circuit is connected with the motor driving circuit. When the motor rotates positively and negatively, a single chip microcomputer is not needed, the cost is reduced, software burning is not needed, and the process is simple during mass production.

The embodiment of the utility model provides a motor positive and negative rotation control circuit and system and a clothes airing machine, and relates to the technical field of electronic circuits. The circuit comprises a first module which comprises an H-bridge circuit composed of MOS tubes, and the H-bridge circuit is respectively connected with two ports of a motor; the second module comprises a bypass capacitor and a first resistor which are connected in parallel; wherein the first module is respectively connected with the control chip, the power supply, the ground and a port for providing working voltage; the positive electrode end of the second module is connected to a branch where the first module is connected with the power supply and the port for providing the working voltage, and the other end is grounded. The precision and stability of motor control can be improved, and the cost is reduced.

The embodiment of the application provides a window-cleaning robot motor rotation direction detection method and related device, and relates to the cleaning technical field.The method comprises the following steps: obtaining a pulse signal of a detection sensor; the detection sensor comprises a single-phase Hall sensor and / or a single-phase photoelectric sensor; and the rotation direction of the motor is determined according to the characteristics of the pulse signal.The above method replaces the traditional dual-phase Hall sensor or dual-phase photoelectric sensor with the single-phase Hall sensor and / or the single-phase photoelectric sensor, uses the time sequence characteristics of the pulse signal output by the single-phase Hall sensor and / or the single-phase photoelectric sensor to realize high-precision and high-reliability detection of the motor rotation direction, and effectively reduces the complexity of the cost system of the window-cleaning robot.

The application provides a motor braking device, which comprises a frame, a first solenoid for controlling the forward rotation of the motor and a second solenoid for controlling the reverse rotation of the motor are arranged in the frame respectively; the first solenoid and the second solenoid each comprise a coil, a moving iron core and a static iron core, the static iron core is sleeved on one end of the moving iron core, and the coil is arranged on the outer side of the moving iron core and the static iron core; one end of the moving iron core is arranged outside the static iron core and connected with a first driving element, the other end of the moving iron core is connected with a second driving element, the first driving element is connected with a driving switch, and the second driving element is connected with a limit switch through a third driving element. The two solenoids are arranged to control the forward and reverse rotation of the motor respectively, the coils of the two solenoids are electrified to control the forward and reverse rotation of the motor respectively, and the coils are automatically connected with a standby braking circuit after losing electricity; when a switch SL3 in the electric circuit is actuated, the motor is instantaneously braked, and the braking is rapid and reliable.

The utility model provides a three-station motor control system. The three-station motor control system comprises a power supply module, a station detection module, a main control module, a first driving module, a second driving module and a man-machine interaction module, the power supply module is used for supplying power; the station detection module is used for detecting the station state of the three-station main switch and sending a station detection signal to the main control module; the main control module controls the corresponding action of the motor through the first driving module and controls the corresponding action of the electromagnetic brake through the second driving module according to the station detection signal; the motor is used for driving the three-station main switch to perform station switching; the electromagnetic brake is used for braking the motor; according to the utility model, the station state of the three-station main switch can be detected in real time, so that the main control module can control the motor and the electromagnetic brake to perform corresponding actions, and the station state of the three-station main switch can be displayed.

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 belongs to the technical field of motor driving, and particularly relates to a motor control circuit and an overcurrent protection control method, and the motor control circuit comprises the components of a first control circuit of which the input end is connected with a first pin for receiving a first control signal and the output end is connected with a first electrode; the input end of the second control circuit is connected with the second pin for receiving a second control signal, and the output end of the second control circuit is connected with the second electrode; the overcurrent protection circuit is respectively connected with the first control circuit, the second control circuit and the motor driving chip; the first control circuit and the second control circuit can control forward rotation and reverse rotation of the motor according to the first control signal and the second control signal respectively; the overcurrent protection circuit can output a control signal to the motor driving chip when the motor is in a forward / reverse rotation state so as to control the working state of the motor according to the control signal. According to the scheme, the working state of the motor can be controlled according to the current in the forward / reverse rotation control circuit, motor overcurrent is avoided, and the motor is protected.

The utility model discloses a motor control system of an automobile seat. The motor control system comprises a control module, a relay driving module, a speed regulation driving module and a motor driving module, the relay driving module comprises a plurality of relays; the positive electrodes of the motors of the multiple automobile seats are all connected with the same relay, and the negative electrodes of the motors of the automobile seats are connected with the relays in a one-to-one mode. According to the motor control system of the automobile seat, one relay is used for controlling the positive electrodes of the motors of all the automobile seats, other relays independently control the negative electrodes of the motors of the automobile seats, a parallel relay driving circuit of the motors of the automobile seats is achieved, and then the motors of the automobile seats can be connected in series and in parallel through special series-parallel connection of the relays. The use number of relays is effectively reduced, and the cost of the motor driving circuit of the automobile seat is reduced; and meanwhile, the speed regulation of the motor can be realized while the positive and negative rotation of the motor is ensured, and the problem that the traditional relay control circuit cannot regulate the speed is solved.

This disclosure provides a method, device, and circuit for controlling motor operation. The method includes: acquiring a signal flowing through the motor; generating a state control signal for controlling the motor's rotation state based on the acquired signal; receiving a direction control signal for controlling the motor's rotation direction; performing a first logical operation on the direction control signal and the state control signal to generate a first control signal; performing a second logical operation on the direction control signal and the state control signal to generate a second control signal; and controlling the motor's rotation state and direction based on the first and second control signals. Applying this method, the motor can be determined to be in normal operation or a blocked state based on the acquired signal flowing through it. State control signals are generated according to different states. Based on the state control signal and the direction control signal, damage to the motor and drive circuit due to overheating caused by blockage is effectively prevented, improving the motor's anti-interference capability and stability.

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 present application relates to an electric-motor control system for a movable furniture unit. The electric-motor control system comprises an electric motor, a power source, a manually controlled switch and a pinch protection execution switch, wherein the pinch protection execution switch may be switched between a first execution position and a second execution position; at the first execution position, the electric motor is connected to the manually controlled switch by means of the pinch protection execution switch, and the polarity of a voltage that the power source applies to the electric motor is changed by means of switching the manually controlled switch; and at the second execution position, the electric motor is connected to the power source by means of the pinch protection execution switch, and the electric motor rotates and drives the furniture unit to extend so as to realize pinch protection. The present invention further relates to a pinch protection apparatus and a pinch protection system for a movable furniture unit, and the movable furniture unit.

The invention discloses a transmission circuit and a transmission method for steering and rotating speed signals of a three-wire direct current motor, and the circuit comprises a motor power supply positive electrode end, a motor speed regulation negative electrode end, a grounding transmission end and a Hall sensor, the motor power supply positive electrode end and the motor speed regulation negative electrode end are electrically connected with a Hall positive voltage end through a rectification filter circuit and a voltage stabilizing circuit; the grounding transmission end is electrically connected with the Hall grounding end; and the direction and speed signal output pin is electrically connected with the Hall grounding end through the signal superposition circuit, so that a direction signal and a speed signal generated by the Hall sensor are superposed with quiescent currents of the voltage stabilizing circuit and the Hall sensor and are transmitted out through the grounding transmission end. On the basis of three wires of an original direct current motor, two wires are used for supplying power to the motor and the Hall sensor, and the other wire can be used for transmitting a direction signal, a speed signal and a quiescent current of the Hall sensor and a quiescent current of a voltage stabilizing circuit besides being used for anti-interference grounding.

A stepless regulation fan includes a fan main body, a main control circuit, a stepless regulation element electrically connected with the main control circuit and a first driving circuit. The fan main body is equipped with a first motor and fan blades connected to the first motor. The control circuit board integrates the main control circuit, a stepless regulation element electrically connected with the main control circuit and a first driving circuit. The stepless regulation element is configured for user operation. The first driving circuit is electrically connected to the first motor. The stepless regulation element includes an encoder switch, the encoder switch includes a first pin and a second pin, the first pin and the second pin are electrically connected with the main control circuit.

[Subject Matter] To provide a positioning device that enables highly accurate positioning control. [Solution(s)] A positioning device consists of an actuator composed of a DC motor 200, a deceleration mechanism, and a single-phase rotation sensor 20 for detecting the amount of rotational displacement of the deceleration mechanism, and an electronic control unit 1 that electrically drives the DC motor. The electronic control unit 1 learns the time T2 required for the motor to stop after turning off the power, and decelerates and controls the DC motor 200 to stop at a target rotation stop position MP, which is approximately midway between the rising edge N+4f and the falling edge N+4r of the output pulse of the rotation sensor.

The invention discloses a motor driving circuit, a motor assembly, a camera module and electronic equipment, and belongs to the technical field of optical anti-vibration. A motor drive circuit comprises an acceleration circuit and an H bridge, the input end of the acceleration circuit is electrically connected with the output end of a controller, the output end of the acceleration circuit is electrically connected with the input end of the H bridge, and the output end of the H bridge is electrically connected with a motor. The acceleration circuit is used for outputting a superposed signal based on a control signal output by the controller, and the superposed signal is obtained by superposing a pulse signal and a step signal; and the H bridge is used for outputting a driving current, and the driving current has the same shape as the superposed signal in the time domain.

Provided is a switching module and a process of commutating the switching module. The switching module includes an H-bridge circuit with bidirectional switches and an active clamp with switches that are also arranged as an H-bridge. The process of commutating the switching module includes a sequence of alternating first and second commutation events where timing signals used to control the switches during each commutation event are varied according to closed loop control of the voltage across the energy storage device of the active clamp.

A wearable device may include a motor, a motor driver circuit, a frame connected to the motor, where the frame is worn on a body of a user to support the body, a processor configured to generate control signals for controlling electrical connections in the motor driver circuit, and a sensor configured to sense body motion of the user. The processor is further configured to provide an exercise load through the frame in accordance with the sensed speed of the body movement by controlling each change ratio based on the speed of the body movement between a first control state in which the electrical connections in the motor driver circuit are closed-loop and a second control state in which the electrical connections in the motor driver circuit are closed-loop based on the speed of the body movement. In the second control state, the electrical connections in the motor driver circuit are open-loop.

The invention provides a direct current motor driving system integrating remote measurement and safety control, and relates to the technical field of motor driving and control, and the system comprises a PWM signal conditioning circuit which receives and conditions a PWM signal and is originally compatible with Pixhawk; the bidirectional polarity control circuit realizes positive and negative rotation of the motor through an optical isolation solid-state relay; the H-bridge driving circuit modulates the current of the motor; the current and voltage sensing circuit is used for generating current and voltage analog signals; the step-down conversion circuit supplies power to the flight controller; the logic level conversion interface is used for realizing 3.3 V / 5V level conversion; the telemetering output circuit outputs the analog signal to a flight controller ADC and transmits the analog signal to a ground station through MAVLink; and the fault protection circuit is used for triggering protection during overcurrent, overvoltage or undervoltage. Through the integrated design, the problems that a traditional driving module is poor in compatibility and lacks telemetering and protection are solved, and plug-and-play, state sensing, safe and reliable integrated driving is achieved.

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

The 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.

Disclosed in the present disclosure is a bidirectional freewheeling circuit for a direct current motor. Two unidirectional freewheeling circuits are connected in parallel between a power supply and the direct current motor, the two unidirectional freewheeling circuits are a unidirectional freewheeling circuit I and a unidirectional freewheeling circuit II in sequence, and the unidirectional freewheeling circuit includes a diode and an equivalent switch connected in series to the diode. Conduction directions of the diodes in the two the unidirectional freewheeling circuits are opposite, when a voltage applied to both ends of the motor satisfies Ua>Ub, the equivalent switch I is turned on, the equivalent switch II is turned off, and when the voltage applied to both ends of the direct current motor satisfies Ua<Ub, the equivalent switch II is turned on, and the equivalent switch I is turned off.

The embodiment of the invention provides a PID self-adaptive control ultrasonic imaging method and system based on direct-current motor constant-speed driving. The method comprises the steps that an acquisition signal of a target position is acquired; wherein the target position is a target blood vessel in peripheral blood vessels; based on the acquired signal, controlling an ultrasonic probe of the catheter to perform rotary scanning through a motor to obtain ultrasonic echoes; processing the ultrasonic echo through a preset ultrasonic imaging module to obtain an ultrasonic signal image; and performing coordinate transformation on the ultrasonic signal image to obtain a cross section image and a longitudinal section image of a target blood vessel corresponding to the target position. According to the scheme, the ultrasonic imaging stability of the system can be improved, so that the image quality of the cross section image and the longitudinal section image of the target blood vessel is improved.

The application discloses a single-power-supply double-input-end digital isolated brush motor servo driving device, and belongs to the technical field of motor driving. The device comprises a double-end input isolation control interface circuit, a control driving circuit, a power output H-bridge circuit, a current-limiting protection circuit and a system power supply circuit. The double-end input isolation control interface circuit is connected with a signal source. The system power supply circuit is connected with an external power supply. The system power supply circuit is connected with the double-end input isolation control interface circuit and the control driving circuit. The power output H-bridge circuit is electrically connected to the external power supply. The power output H-bridge circuit is connected with a direct-current brush motor. The double-end input isolation control interface circuit comprises an optical coupler O1 and an optical coupler O2, and outputs signals to the control driving circuit. The power output H-bridge circuit is controlled according to the output signals to drive the direct-current brush motor. The application has the effects of being capable of regulating and controlling various states of the motor through a simple circuit, low cost and small space occupation.