87results about "DC motor rotation control" patented technology

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 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 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 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 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.

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 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.

The utility model discloses a high-voltage detection and timing H-bridge driving circuit, and belongs to the technical field of motor driving. The high-voltage detection and timing H-bridge driving circuit comprises a high-voltage detection unit, a gate driving unit and an H-bridge circuit, the high-voltage detection unit is connected with the four comparators through voltage division output, and the two groups of comparators are respectively used for comparing different voltage sources to realize accurate high-voltage detection. The grid driving unit comprises a first trigger, a second trigger, a first grid driver and a second grid driver, and effective control over the grid of the H-bridge circuit is achieved through cooperative work of the triggers and the grid drivers. And the grid electrode of the H-bridge circuit is connected to the output end of the grid electrode driver and is used for being connected with an external load driver. According to the utility model, the problem that the motor driving circuit in the prior art is difficult to realize the accurate management of the steering of the motor under the condition that long-time accurate timing control is required is effectively solved.

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.

The utility model discloses an integrated circuit, which belongs to the technical field of semiconductors, comprises a logic gate circuit Gata, a dead zone control unit, an over-current protection unit and a driving output unit, solves the technical problems of providing stable dead zone control, quickly responding to over-current protection and preventing simultaneous conduction of HO and LO in the process of driving an H bridge, does not need to be controlled by an MCU (Microprogrammed Control Unit), and is convenient to use. The system independence is improved, the hardware circuit response speed is high, RC delay and a Schmitt trigger are adopted, stable and reliable dead time is ensured, efficient dead time control is achieved, a current sampling resistor, a comparator and a D trigger are adopted for over-current detection, the response speed is high, an H-bridge driving signal is cut off immediately during over-current, damage is prevented, the logic gate design ensures that no driving signal exists when A = 1 and B = 1 or A = 0 and B = 0, and the system reliability is improved. H-bridge direct connection is avoided, overcurrent alarm is provided through an ALRM pin, and fault detection of the system is facilitated.

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.

To make it possible to give a drive command and a brake command to a motor using a small number of control signals. For this purpose, a motor control apparatus for controlling a motor via a drive circuit includes a generation unit for generating a short-circuit brake signal for applying a short-circuit brake to the motor in a case where a control signal for controlling the motor instructs a stop of the motor, and an instruction unit for outputting an instruction for the short-circuit brake to the drive circuit in a case where the short-circuit brake signal is being generated, and outputting an instruction based on the control signal to the drive circuit in a case where the short-circuit brake signal is not being generated.

Motor driver circuitry including an H-bridge circuit having first and second outputs. The circuitry further includes a first transistor, having a first terminal, a second terminal coupled to the first output, and a control terminal, and a second transistor, having a first terminal coupled to the first terminal of the first transistor, a second terminal coupled to the second output, and a control terminal. A common mode circuit has an enable input and an output coupled to the H-bridge circuit. Transistor driver circuitry has an enable input and an output coupled to the control terminals of the first and second transistors. A comparator has an input coupled to the first output, and an output coupled to the enable input of the common mode circuit and the enable input of the transistor driver circuitry.

An apparatus and method for controlling a motor are provided. The apparatus includes: a switch connected to a power source and configured to close and open a circuit; a relay connected to the motor and configured to switch the polarity of the motor by switching the connection of its contacts; and a controller connected to the switch and the relay and configured to control the closing and opening of the switch and control the connection of the relay with the contacts. Therefore, the solution for controlling a motor according to embodiments of the present invention has a simple structure and low cost.

A drive circuit for a roof assembly, the roof assembly comprising a roof panel movable between a closed position and an opened position by a motor, the drive circuit comprising an H-bridge comprising switch elements for controlling the speed of the motor; a reverse polarity protection switch, such as a MOSFET; and at least one measurement circuit. The drive circuit is configured for receiving a PWM-signal with a duty cycle for operating the H-bridge. The at least one measurement circuit is configured for performing a current measurement of at least one of the switch elements of the H-bridge and / or the reverse polarity protection switch, respectively.

A sliding-door drive unit for a vehicle is capable of transferring or blocking drive power required to pull or push a cable to open or close a sliding door. The sliding-door drive unit includes a worm wheel rotatable by a drive motor, a stationary disc coupled to an output shaft, and a movable disc rotatably installed between the worm wheel and the stationary disc along an axial direction of the output shaft. The movable disc is engaged with the worm wheel and is selectively engaged with the stationary disc.

The application discloses a DC motor negative power driving circuit, and particularly relates to the technical field of motor driving, which has the technical features that a power input unit is used for reducing the voltage of a power supply and monitoring the voltage of the power supply, and the voltage input of the power supply is stopped when the voltage exceeds a preset threshold; a motor adjustment detection unit is used for receiving the voltage output by the power input unit, identifying and detecting the positive and negative rotation of the voltage, and outputting an adjustment action signal; a motor adjustment locking unit is used for receiving and locking the adjustment action signal output by the motor adjustment detection unit, and controlling the signal locking time; a motor driving and monitoring unit is used for receiving the adjustment action signal output by the motor adjustment locking unit, driving and controlling the motor based on the adjustment action signal, and monitoring the running current of the motor and the in-place state, and triggering the motor adjustment to stop when the overcurrent condition and the in-place condition are reached.

The invention relates to an electric motor control circuit for an electromechanically adjustable steering column (10) of a vehicle, comprising: a bridge circuit (12) for controlling an electric motor, wherein one side of the bridge circuit (12) is electrically connected to a supply voltage (20); a switching element (14) which is electrically connected to ground (22) and to the bridge circuit (12); a voltage divider (16) between the supply voltage (20) and ground (22), in parallel to the bridge circuit (12) and the switching element (14), wherein a control point (A), at which a divided voltage of the voltage divider (16) is present, is electrically connected to the switching element (14); and a control unit (18) which is configured to control the bridge circuit (12) and the switching element (14) such that a potential is established at the control point (A) from which defects in the bridge circuit (12) and / or the switching element (14) can be detected.Furthermore, a method for determining an operating state of the electric motor control circuit and a steering column are proposed.

To provide a semiconductor element capable of suppressing occurrence of latch-up at current off operation while suppressing increase in mounting area by layout improvement.SOLUTION: A semiconductor element includes: first to fourth transistor formation regions (1, 2, 3, 4) formed mutually apart on a semiconductor substrate (S1) of a first conductivity type; a first impurity region (R1) of the first conductivity type with higher impurity concentration than the semiconductor substrate and formed between the first transistor formation region (2) and the second transistor formation region (3); and a second impurity region of the first conductivity type with higher impurity concentration than the semiconductor substrate and formed between the third transistor formation region (4) and the fourth transistor formation region (1), wherein the first to fourth transistor formation regions are arranged in line along a first direction (X direction).SELECTED DRAWING: Figure 4

An electric drive unit (100) for an electric hand-held power tool (1), having an electric motor (7) with a stator winding (12) and a rotor winding (14), a control circuit (4) for controlling the electric motor (7) and a connection unit (6, 8) for coupling an energy source (2) for driving the electric motor (7), wherein the stator winding (12) is connected, via a first node (10), to a first stator-side half bridge comprising a first semi-conductor component (T1) and a second semi-conductor component (T2), and is connected to the rotor winding (14) via a second node (16), the rotor winding (14) being connected to a third node (18) which is connected to the connection unit (6, 8) via a conductive component (T4), and wherein the control circuit (4) comprises a third semi-conductor component (T3) which is connected to the rotor winding (14) and the stator winding (12) via the second node (16) and which is connected directly to the connection unit (6, 8) via a fourth node (20).

This application provides a DC-driven cleaning system, including: a power board, a control board, an image acquisition unit, a drive unit, and cleaning components; the power board, control board, and image acquisition unit are electrically connected; the control board is equipped with an H-bridge motor drive chip, which is electrically connected to and controls the drive unit; the power board receives digital switch output signals related to image acquisition from the image acquisition unit, thereby controlling the power supply to the H-bridge motor drive chip, and thus controlling the start or stop of the drive unit; the drive unit is connected to and drives the cleaning components to perform rotation and cleaning operations. This application uses a motor-driven air brush to clean the cabinet glass, thereby achieving automatic dust removal, realizing timed cleaning of the cabinet glass in front of the camera, reducing reliance on manual cleaning, and ensuring that the camera can clearly capture road traffic conditions, improving the accuracy and quality of captured images.