91results about "AC motor direction control" patented technology

The invention provides a carrier rocket engine stage-switching motor redundancy control system, which is combined with a multi-input instruction redundancy voting method, a voting path software and hardware arbitration method and the like to complete high-reliability carrier rocket engine stage-switching motor control. According to the system, two-out-of-three voting is carried out by using a triple-redundancy input control instruction and interactive heartbeat, software and hardware joint arbitration is carried out on voting results of three modules, and an instruction control channel is determined to complete phase sequence control of the stage conversion winding. The method has strong fault capability, has no single-point failure link, and can ensure the normal operation of the engine conversion motor in the flight process of the carrier rocket.

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.

To provide a fastening tool capable of restraining or preventing dispersion of a stop position when a driving mechanism stops.SOLUTION: The fastening tool includes a motor having a motor shaft, a housing, a pin-gripping part, a driving mechanism connected to the pin-gripping part and configured to perform rearward movement and forward movement, a position acquisition part configured to acquire a relative position of the driving mechanism, and a motor control part configured to switch a moving direction and a moving speed of the driving mechanism. The motor control unit starts forward movement of the shaft such that the movement speed becomes a first speed, decelerates the movement speed to a second speed slower than the first speed by PWM control for changing a duty ratio output to the motor when the acquired relative position reaches a deceleration position behind the initial position in the forward movement, and stops driving of the motor when the acquired relative position reaches a predetermined braking position in front of the deceleration position and behind the initial position.SELECTED DRAWING: Figure 11

The utility model discloses a motor driving circuit, a PCB and a motor. The motor driving circuit comprises a three-phase H-bridge circuit unit and a driving unit. The three-phase H-bridge circuit unit comprises a U-phase H-bridge circuit, a V-phase H-bridge circuit and a W-phase H-bridge circuit, and each phase of H-bridge circuit comprises an upper bridge arm switch tube and a lower bridge arm switch tube; the drain electrode of the upper bridge arm switch tube of each phase H-bridge circuit is connected with the positive electrode of a power supply, the source electrode is connected with a CON point, the drain electrode of the lower bridge arm switch tube is connected with the CON point, and the source electrode is grounded; the driving unit comprises six paths of driving signal lines which are respectively connected with grid electrodes of the H-bridge circuit switch tubes of all phases and are used for switching and outputting conduction levels of the bridge arm switch tubes of all phases according to chip signals. Stable switching of forward rotation and reverse rotation of the motor can be achieved, fan blades can be driven to periodically and reversely rotate, accumulated dust is promoted to be separated from the surfaces of the blades, and long-term efficient heat dissipation of the fan is maintained.

The utility model discloses a motor control circuit and a pedestal pan. The motor control circuit comprises a control module, a first switch module, a second switch module and an impedance module. The control module, the motor, the first switch module, the second switch module and the impedance module are electrically connected to the first node and the second node. The control module outputs a first voltage signal or a second voltage signal. The first switch module responds to the first voltage signal and establishes a path for current to flow from the first node to the second node, so that the motor rotates in the first direction. And the first switch module responds to the second voltage signal and establishes a path for the current to flow from the second node to the first node, so that the motor rotates in the second direction. The second switch module is turned on in response to the motor outputting back electromotive force to the first node to establish an electrical connection between the second end of the impedance module and the second end of the motor. By means of the mode, the closestool cover can be controlled to be normally closed and opened, and meanwhile slow descending of the closestool cover when the closestool cover is closed is achieved.

The utility model discloses a lubricating pump of a progressive lubricating system. The lubricating pump comprises a plunger pump component, an electric control board component, a plunger driving component and an oil storage barrel. The plunger pump component comprises a pump body, a plunger and an oil outlet one-way valve, a plunger hole, an oil suction hole and an oil outlet hole are formed in the pump body, one end of the oil suction hole is connected with the inner wall of the plunger hole, the other end of the oil suction hole is connected with the oil storage barrel, and the oil inlet side and the oil outlet side of the oil outlet one-way valve are connected with the plunger hole and the oil outlet hole respectively; the electric control plate component is electrically connected with the plunger driving component, and the plunger driving component is connected with the plunger, so that the electric control plate component controls the plunger driving component to drive the plunger to axially reciprocate along the plunger hole. The utility model not only has large oil output, but also has the advantages of simple structure, reliable work, compact layout and the like.

This invention provides a motor control method, a motor control device, a readable storage medium, and a motor. The motor control method includes: setting a set speed and a set direction of rotation for the motor; acquiring the rotor position, operating speed, and operating direction of the motor while it is running; acquiring a first input value for the set speed and a second input value for the operating speed based on the operating direction, operating speed, set speed, and set direction of rotation; acquiring a target current based on the first and second input values; acquiring the actual current of the motor; acquiring a first control value based on the target current and the actual current; acquiring the chopping direction and duty cycle of the three-phase inverter bridge based on the first control value; acquiring the energizing phase sequence of the three-phase inverter bridge based on the operating direction of rotation; and controlling the motor operation using the three-phase inverter bridge based on the chopping direction, duty cycle, rotor position, and energizing phase sequence.

The invention discloses a push rod limiting circuit, a push rod limiting method, a push rod device and an aerostat, and relates to the technical field of push rod limiting. A first solid-state relay and a second solid-state relay of a solid-state relay control module are each provided with a control end and a controlled access; a first limit switch of the limit switch module is connected in series in a loop between the rectification power supply module and the control end of the first solid-state relay, and a second limit switch is connected in series in a loop between the rectification power supply module and the control end of the second solid-state relay; the PWM driving module is used for receiving PWM power supply and selectively supplying power to the push rod motor through a controlled access of the first solid-state relay and the second solid-state relay so as to control forward and reverse rotation and speed regulation of the push rod motor; according to the push rod limiting circuit, contactless switching of the solid-state relay is combined with PWM speed regulation, power supply of the motor is cut off instantaneously at the limiting position, meanwhile, mechanical abrasion, contact oxidation and electromagnetic interference are avoided, and long-service-life and high-reliability limiting under the high-altitude severe environment is achieved.

The invention provides a motor driving device for generating sampling resistors based on lead bonding, a motor driving circuit comprises a driving unit U1, a motor interface unit, a first switch assembly, a second switch assembly, a first sampling resistor Rs1 and a second sampling resistor Rs2, and the first sampling resistor Rs1 and the second sampling resistor Rs2 are generated by a metal wire structure in a lead bonding mode. The first switch assembly and the first sampling resistor Rs1 form a first current path, the second switch assembly and the second sampling resistor Rs2 form a second current path, and the motor interface unit is communicated with the first current path and the second current path; when the first switch assembly is switched on under the control of the driving unit U1, current flows through the first current path, and the motor rotates in the first direction. When the second switch assembly is switched on under the control of the driving unit U1, the current flows through the second current path, and the motor rotates in the direction opposite to the first direction.

According to the electronic switch used for controlling the slot control motor, one end of a box body is provided with a main power supply input end, the other end of the box body is provided with a main power supply output end, a U-phase power supply, a V-phase power supply and a W-phase power supply in the main power supply input end are respectively connected with a main loop, and meanwhile, safety devices are arranged on the U-phase power supply and the V-phase power supply; the main loop is provided with four alternating current reversing switches used for being connected with a slot control motor, the main loop is connected with a voltage detector and a current detector, the voltage detector and the current detector are respectively connected with a data processor, the data processor is connected with a controller, and the controller is connected with an optoelectronic isolator, a state indicating lamp, a thyristor and a control input end. The invention has the characteristics of long service life, large controllable power, small volume and no mechanical wear and arc corrosion risk.

A method for manufacturing a power inverter may include determining several electrical properties of both a first and a second power switch chip. These several electrical properties include at least a conduction loss and a switching loss. Furthermore, the method may include manufacturing the power inverter at least partially using both the first and second power switch chips based on the several electrical properties of both.

The invention provides a permanent magnet synchronous motor rapid direction response control device based on position prediction and an implementation strategy, belongs to the technical field of permanent magnet synchronous motor control, and aims to solve the problems that a traditional control scheme is lagged in response, the precision is easily interfered by working conditions, and the fault tolerance is insufficient. The device comprises a position / current acquisition unit, a position prediction calculation unit, a speed calculation unit, a fast direction response control unit, a PWM generation unit, a driving unit and a fault diagnosis unit, and cooperation of signal acquisition, prediction calculation, control generation and driving feedback is realized through a closed-loop link. According to the method, optimal control is carried out through position prediction, feed-forward compensation, load adaptive weight adjustment and fault dynamic correction. The method can improve the direction response speed and stability of the motor, enhances the control precision under different working conditions, optimizes the resource utilization rate, improves the fault tolerance of the system, and is suitable for industrial servo, precision transmission and other scenes.

Enhanced network power factor corrective designs are presented that can use corrective devices that achieve long-term, operationally stable mechanical work. Embodiments can utilize reverse-winding induction motor designs with engineerable parameters and configurations for the reverse winding (13) in systems and through methods where an inductive motor (1) can present a current that leads voltage and a leading power factor (16) to correct other existing induction motors (8) in an initial network (9) or be optimized for a particular application. Designs also present a power factor correction that can present a variable correction without altering the character or physical capacitive value of an electrical correction component. Individual induction motors that have leading current and a leading power factor (16) can be provided to improve reverse winding induction motors. Progressive start controls (23) can also be used in a manner that limits inrush current to operational levels with passive current establishment control where reverse winding (13) effects can be used and perhaps even delayed to passively limit and even effect a current decrease while rotational acceleration continues after initial start transition.

The invention relates to a miniaturized high-detection-rate IDA motor drive circuit and a control system, and relates to the field of aero-engine control. Aiming at the defects that a traditional motor driving circuit cannot meet the requirement for high performance of an aero-engine and is large in size, high in cost, low in reliability and the like, the invention provides the low-cost and high-reliability micro IDA motor driving circuit, the 100% localization driving function is achieved, the size is remarkably reduced, the cost is reduced, the reliability and the safety are improved, and the application range is wide. The electric arc risk can be avoided in a large current transient state, the loss is lower, and the heat dissipation is better; a CPU and an FPGA cooperatively control an MOS tube, and a BIT detection mechanism for parallel load voltage acquisition is matched, so that faults can be accurately judged, the driving capability and the control precision can be improved, motor protection and monitoring can be realized, the BIT detection rate is high, and the response is fast; and meanwhile, the device is flexible to place, high in integration level, convenient for system design, capable of improving the production efficiency and optimizing the cost performance, and remarkable in industrial application value.

A fastening tool includes a driving mechanism that is connected to perform rearward movement and forward movement, a position obtaining part that is configured to obtain a relative position of the driving mechanism, and a motor controlling part that is configured to change a moving direction and a moving speed of the driving mechanism. The motor controlling part starts the forward movement of the driving mechanism such that the moving speed reaches a first speed; reduces the moving speed to a second speed lower than the first speed by PWM control for changing a duty ratio outputted to the motor, when the obtained relative position reaches a deceleration position rearward of the initial position in the forward movement, and stops driving of the motor when the obtained relative position reaches a predetermined braking position forward of the deceleration position and rearward of the initial position.

The invention relates to a PLC-controlled frequency conversion control device for a ball mill, which realizes the automatic operation of the ball mill through the cooperative work of a programmable controller, a frequency converter and a peripheral circuit. The core of the method is that a PLC executes a preset program, and a motor is controlled to complete a complete cycle of power-on, time delay, forward soft start and operation, stop, time delay, reverse soft start and operation, stop and power-off in sequence. In a key circuit, output points Y02 and Y03 of the PLC are connected with a forward rotation control terminal and a reverse rotation control terminal of the frequency converter respectively, smooth starting and stopping of the motor are achieved by setting acceleration time (300 seconds) and deceleration time (10 seconds) of the frequency converter, and mechanical and current impact is effectively reduced. The forward and reverse rotation time is flexibly set through a PLC parameter interface, grinding medium segregation is eliminated through automatic alternate operation, and the grinding uniformity and the product quality are improved. Double safety protection of program normal stop and hard wire sudden stop is integrated, and safety, high efficiency and automation of ball mill control are achieved.

A motor steering changer, to be electrically connected to a digital control motor, includes: a wiring unit having a first contact and a second contact; and a switching unit having an AC contact, a determination contact, a control end and an electrical control switch. Electrically connecting the determination contact to the first contact causes the control end to controllably cause the electrical control switch to cause a closed circuit and thus connection, allows a single-phase controller on the digital control motor to receive positive power signals, and causes the single-phase controller to controllably cause the digital control motor to undergo clockwise rotation. Electrically connecting the determination contact to the second contact causes the control end to controllably cause the electrical control switch to cause an open circuit and thus disconnection, and causes the single-phase controller to controllably cause the digital control motor to undergo counter-clockwise rotation.

The invention provides an ultra-short period reciprocating motion control system and method for a cutter head of a planer. The system comprises a main control module, a driving control module and a signal feedback module which are connected in sequence, the driving control module and the signal feedback module are respectively connected with a motor for controlling the planer tool bit to reciprocate; the signal feedback module is used for acquiring real-time motion information of the motor and feeding back the real-time motion information to the main control module; the main control module is used for calculating the current speed of the motor according to the real-time motion information and determining a driving control strategy based on the current speed and a reciprocating motion instruction from a user; the drive control module is used for executing speed control and forward and reverse reciprocating motion on the motor based on the drive control strategy. When the planer is applied to an orthopaedic arthroscopic surgery, the cutting frequency in unit time can be effectively increased, so that the medical care requirement of efficiently cutting damaged tissues is met, the movement stability and accuracy of the planer tool bit can be ensured, and the surgery efficiency is greatly improved.

The utility model discloses a high-integration, high-precision and high-safety electronic limiting curtain drawing motor, and relates to the technical field of curtain drawing motors. The motor comprises a motor body, and further comprises a motor controller which is used for controlling the motor body to move; the motor controller comprises a single-chip microcomputer control unit, an open-phase judgment circuit, a phase sequence protection circuit, a reversing circuit, an intelligent voice broadcast circuit, a remote controller circuit, a key circuit, a position control magnetic encoder module, a mechanical limiting module and a power supply system circuit. The motor is controlled by a magnetic encoder and a chip, rotation information of a main shaft of the curtain drawing motor is converted into an electric signal, and high-precision positioning and free stroke are achieved. Phase sequence judgment is realized, and a phase sequence protection function unit is additionally arranged, so that a worker can perform wiring at will without judging the phase sequence, and the problem of complicated installation is solved; the self-developed stable power supply system avoids the risk of a switching power supply, solves the problem of power-off coordinate offset, and greatly reduces the failure rate.

The utility model provides a motor reverse rotation braking circuit and an electric kart, and the motor reverse rotation braking circuit comprises an acceleration control circuit, a braking control circuit, a relay control circuit, and a motor controller. Wherein the acceleration control circuit is used for generating an acceleration control signal; the brake control circuit is used for generating a brake control signal; the relay control circuit is used for detecting a brake control signal and correspondingly outputting an acceleration control signal and a forward rotation signal or the brake control signal and a reverse rotation signal according to a detection result; the forward and reverse rotation control end of the motor controller detects a forward rotation signal or a reverse rotation signal to control the motor to rotate forwards or reversely, and the speed regulation control end detects an acceleration control signal or a brake control signal to control the torque of the motor. According to the utility model, a braking scheme based on reverse rotation of the motor is realized, kinetic energy conversion is automatically realized through an existing motor control system, rapid braking is realized, and the core requirements of economy, reliability and rapid response in a low-speed scene are met.

The invention provides a collision protection system and method for a servo control device, and a computer readable medium, which can limit a collision peak force within a range in which damage is not caused even in a high-speed mode, can realize flexible buffering, and can improve system stability. The collision protection system for the servo control device comprises a servo motor which drives the servo control device based on a torque control signal and outputs position feedback through a servo motor encoder; a servo drive device that generates a speed feedback on the basis of a differential value of the position feedback, and outputs a torque control signal to the servo motor on the basis of a reverse command torque when a collision occurs to the servo control device; and a collision protection device that generates a reverse command torque on the basis of the position feedback, the speed feedback, and the servo motor characteristics, and in a time range corresponding to the number of reverse torque duration cycles generated on the basis of the number of command position execution cycles corresponding to the servo drive device and the servo motor. The reverse command torque is supplied to the servo drive device.

The application relates to the motor technical field, in particular to a friction torque self-locking speed reduction motor, which comprises a motor and a speed reduction box, the motor is detachably arranged on the speed reduction box, a torque shaft is rotationally arranged on the speed reduction box, a clamping plate is arranged on the torque shaft, a worm wheel is coaxially arranged on the torque shaft, a worm is rotationally arranged on the speed reduction box and is in mesh with the worm wheel, a gear set for speed reduction is arranged between the worm and an output shaft of the motor, and a load protection assembly is arranged in the speed reduction box; when the torque shaft stops rotating, the load protection assembly controls the motor to stop rotating. The application has the effects of self-locking, overload prevention and adaptation to different working scenes.

The utility model particularly relates to a bidirectional motor positive and negative rotation mutual exclusion circuit and a household electrical appliance with the same, comprising a normally open relay K1, a normally open contact of which is connected in series with a motor power supply loop; a contact of the double-pole double-throw relay K2 is connected with the power supply and the motor so as to switch forward and reverse rotation directions; the output end of the single chip microcomputer U1 is respectively connected with a first triode Q1 and a second triode Q2, the first triode Q1 and the second triode Q2 are respectively connected with the control end of the normally open relay K1 and the control end of the double-pole double-throw relay K2, and the on-off of the normally open relay K1 and the switching of the double-pole double-throw relay K2 are controlled through the single chip microcomputer U1; and the switching ends of the motor M and the double-pole double-throw relay K2 are respectively connected with a directional excitation coil of the motor M. According to the circuit, through combination of the single-chip microcomputer U1, the first triode Q1 and the second triode Q2, switching or on-off of the normally open relay K1 and the switching double-pole double-throw relay K2 is controlled, and safety and reliability are enhanced.

This utility model discloses a dual MOSFET drive motor forward and reverse rotation circuit, comprising: a signal input module, a signal processing module, a drive module, and a motor module; the output terminal of the signal input module is connected to the input terminal of the signal processing module, the output terminal of the signal processing module is connected to the input terminal of the drive module, and the output terminal of the drive module is connected to the input terminal of the motor module. Utilizing the low internal resistance of the MOSFETs, energy loss during current transmission is greatly reduced, resulting in a significant decrease in power consumption. Furthermore, the low temperature drift coefficient of the MOSFETs makes their performance more stable and reliable, with minimal impact from temperature fluctuations, reducing equipment failures caused by temperature changes, effectively extending the equipment's service life and maintenance cycle, and providing strong support for the efficient and stable operation of the galvanometer drive.

The utility model discloses a kind of power semiconductor motor drive module, including multiple drive chips, multiple power switch tubes, current sensor, every drive chip controls n power switch tube, the current sensor is installed in the circuit of monitoring facility power semiconductor device current;The application is arranged on the circuit of the semiconductor power device by the current sensor, monitors the current value of the failure condition such as the thermal effect of semiconductor power device, when current value exceeds threshold value or exceeds threshold value predetermined time, semiconductor power device is turned off or adjusted, and can cooperate temperature sensor, inductance short-circuit protection sensing component, anti-electromagnetic interference protection component, current noise control component etc. Any one or any several combinations, corresponding parameter in common monitoring module, when exceeding expected threshold value, turn off or adjust power semiconductor state, avoid failure or damage etc.

The invention provides a fastening tool. The fastening tool includes a motor including a motor shaft, a housing, a pin gripping portion, a drive mechanism connected to the pin gripping portion and configured to be capable of moving rearward and forward, a position acquisition portion configured to be capable of acquiring a relative position of the drive mechanism, and a motor control portion configured to be capable of switching a moving direction and a moving speed of the drive mechanism. The motor control unit starts forward movement of the drive mechanism so that the movement speed becomes a first speed, and decelerates the movement speed to a second speed slower than the first speed by means of PWM control that changes the duty ratio output to the motor when the acquired relative position reaches a deceleration position rearward of the initial position during forward movement. When the acquired relative position reaches a predetermined braking position forward of the deceleration position and rearward of the initial position, the driving of the motor is stopped. Therefore, the moving speed of the driving mechanism can be switched with high precision.

The invention discloses an automatic intelligent rubber tapping machine which comprises a first hanging assembly, a second hanging assembly and a rubber tapping assembly. The first hanging assembly comprises a first sliding column, a second sliding column and a first hoop sleeve unit; the second suspension assembly comprises an electric lock unit and a second hoop sleeve unit; the moving assembly is in sliding connection with the second hoop sleeve unit; the glue lifting needle assembly comprises a first lifting unit and a glue lifting needle; the rubber tapping knife assembly comprises a second lifting unit, a first shell and a rubber knife unit. Under the combined action of the first lifting unit and the second lifting unit, the rubber lifting needle can be driven to ascend and descend, so that the rubber line is automatically removed, and the phenomenon that the rubber knife unit slips or winds during rubber tapping is avoided; meanwhile, under the combined action of an electric lock unit, a second lifting unit, a first shell, a first sliding column and a second sliding column, automatic descending of the height of the rubber knife unit can be achieved, and therefore the moving assembly can conveniently drive the rubber knife unit to conduct circulating and reciprocating rubber tapping motion, automatic rubber tapping operation is achieved, and the rubber tapping efficiency is greatly improved.

A method for estimating and compensating interference torque in a lifting system is applied to the motor driving the lifting system. The estimation and compensation method includes: First, controlling the car's movement up and down between the top and bottom of the shaft from its initial position, continuously integrating the motor speed. If the integral value obtained from the speed calculation is negative, the integral value is set to zero to obtain the maximum travel position of the car within the shaft. When the motor is running at a constant speed, the cable load constant is estimated based on the initial position and the maximum travel position, and the cable load torque is calculated based on the maximum travel position, the cable load constant, and the current position of the motor. When the motor is running at zero speed, the load torque of the car and counterweight is estimated based on the weight of the car and the counterweight. Based on the cable load torque and the load torque of the car and counterweight, the interference torque is estimated, and feedforward compensation is performed on the motor based on the interference torque.

The invention discloses a zero-waste-yarn bottoming control method, which is characterized in that a bottoming lifting plate and a flexible steel wire are driven and controlled by a servo motor to provide a controllable traction force when a fabric cannot be pulled at the initial stage of a roller, so that a zero-waste-yarn bottoming effect is realized; meanwhile, magnetized magnetic steel is embedded in the tail of a motor shaft of the wire feeding motor, a magnetic angle sensing chip of the wire feeding motor driving plate is in coupling connection with the magnetic steel, when the wire feeding motor rotates, the magnetic steel at the tail of the motor shaft synchronously rotates along with the motor shaft, and when the magnetic steel rotates, a magnetic field also rotates along with the motor shaft; the change of the magnetic field is sensed and detected through the magnetic angle sensing chip, and the number of rotation turns and the position of the wire feeding motor are recorded. According to the invention, the control precision is improved, the risk of wire harness breakage is significantly reduced, the installation is simplified, and the overall cost is effectively reduced; meanwhile, a control line and a feedback line of the wire feeding motor are saved, and installation is further simplified.

The utility model relates to the technical field of agricultural greenhouse automation equipment, in particular to a greenhouse roller shutter alternating current motor controller which comprises a shell and a circuit assembly. The circuit assembly is integrated with a motor protector, a first alternating current contactor and a second alternating current contactor. The two alternating current contactors adopt a parallel reversing design, and the lifting of the roller shutter of the greenhouse can be controlled by controlling the forward rotation and the reverse rotation of the motor. The system supports a manual control mode and an automatic control mode, can be connected with an environment controller to realize intelligent operation, and can also be operated manually. The utility model has strong applicability, and can be adapted to AC single-phase and three-phase motors. The device also has an overload and short circuit protection mechanism, so that the motor is effectively prevented from being damaged, and the safety and durability of the device are improved. Meanwhile, the device can automatically identify the end point of the stroke of the roller shutter and stop the motor in time, so that mechanical over-winding or loosening is prevented, and reliable operation is guaranteed.