160results about "DC motor rotation control" patented technology

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 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 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 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.

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.

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.

A switching module (10p) is described. The switching module (10p) comprises an H-bridge circuit (16) with bidirectional switches (S1-S4) and an active clamp (18) with switches (S5-S8) that are also arranged as an H-bridge. A process of commutating the switching module (10p) comprises a sequence of alternating first and second commutation events. The timing signals used to control the switches (S1-S8) during each commutation event are varied according to closed loop control of the voltage across the energy storage device (C) of the active clamp (18).

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 invention relates to a circuit for realizing H-bridge driving by using low-side switch driving and a control method, and solves the problem of high cost of H-bridge driving. The control method comprises the following steps: in the H-bridge driving circuit, designing two five-pin relays, namely a relay A and a relay B, designing pins Pin1 and Pin2 of the ECU controller as low-side driving pins, designing pins Pin3 and Pin4 to supply power and ground to the ECU controller, and realizing that the pins Pin1 and Pin2 of the BDC are positive and negative driving control pins. The circuit comprises an ECU controller with four pins, a BDC with two pins, a five-pin relay A and a five-pin relay B. Two pins of the ECU controller are low-side drive control pins, the other two pins of the ECU controller are respectively connected with a KL30 power supply and a GND power supply, the other control end 85 of the high-frequency relay A and the other control end 85 of the high-frequency relay B are connected with the KL30 power supply, and the other control end 85 of the high-frequency relay A and the other control end 85 of the high-frequency relay B are connected with the GND power supply. The output end 30 of the high-frequency relay A is connected with one control pin of the BDC, and the output end 30 of the high-frequency relay B is connected with the other control pin of the BDC. According to the invention, the design cost and the production cost of the ECU can be greatly reduced.

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.

The invention discloses a multi-position operation motor control circuit and a motor vehicle, and is applied to the field of motor design. Wherein N sets of combination switches are included, and each combination switch comprises two single-pole double-throw switches; the fixed ends of the two single-pole double-throw switches in the first set of combined switch are respectively connected with the two ends of the motor; the fixed ends of the two single-pole double-throw switches in the Xth set of combination switch are respectively connected with the normally closed ends of the two single-pole double-throw switches in the (X-1) th set of combination switch; the normally closed ends of the two single-pole double-throw switches in the Nth set of combination switch are connected and are connected with the detection control circuit; the normally open ends of the two single-pole double-throw switches in each combined switch are connected and are connected with a first power supply; and when the fixed end of any single-pole double-throw switch and the corresponding normally open end are closed, the corresponding combined switch and the other sets of combined switches form a loop. According to the invention, motor control of multi-position operation is realized through N sets of combinations, the circuit structure is simple, the operation is simple, and the cost is low.

The invention relates to an arrangement for operating an electric motor, for example an electric motor for actuating a roof component, in a vehicle. Therein, the electric motor is electrically connected via at least two control lines with a motor control unit. The motor control unit is configured to control the electric motor by means of pulse width modulation. The motor control unit is configured to operate a first one of the two drive lines as an inactive line, and to operate a second one of the two drive lines as an active line during control of the electric motor. A switching module associated with the electric motor is configured to connect a terminal of the pole housing of the electric motor with the drive line which is operated as the inactive line during operation of the electric motor. The invention further relates to an electric motor as well as to a method of operating an electric motor, for example an electric motor for actuating a roof component, in a vehicle.