458results about "Stopping arrangements" patented technology

An electric window covering has a covering material, a driving device, a microcontroller, a position detecting module and a trigger detecting module. The position detecting module detects a position of a lower end of the covering material to generate a position information. The microcontroller compares the position information with a reference position to generate a position relationship with respect to the reference position. The trigger detecting module detects whether the covering material is moved by an external force for generating a detecting result. When the microcontroller determines that a trigger event is received according to the detecting result, the microcontroller configures the driving device to move the covering material according to the position relationship and the trigger event.

The invention relates to the field of mechanical oil extraction of oil fields, and discloses an energy consumption braking anti-reverse device and method for an electric submersible centrifugal pump directly driven by a permanent magnet motor. The control cabinet is arranged on the ground, is connected with the permanent magnet synchronous motor in the submersible permanent magnet motor direct-drive electric submersible centrifugal pump oil extraction system through a cable, and can monitor and respond to the working state of the permanent magnet synchronous motor in real time, so that the permanent magnet synchronous motor drives the electric submersible centrifugal pump to work; an energy consumption braking circuit and a motor monitoring protection circuit are arranged in the control cabinet; the motor monitoring protection circuit is used for monitoring and responding to the working state of the permanent magnet synchronous motor in real time; the energy consumption braking circuit is used for being connected when the permanent magnet synchronous motor loses power and consuming reverse electric energy generated by the permanent magnet synchronous motor in time when the permanent magnet synchronous motor rotates reversely. The problem that the service life of the motor is shortened due to the fact that electric energy generated by reverse rotation of the permanent magnet motor under the power-off condition is converted into heat energy to be consumed in the motor can be effectively prevented.

An impact tool includes: an impact mechanism, where the impact mechanism includes an impact block driven by a drive shaft and a hammer anvil receiving an impact from the impact block, and the hammer anvil is connected to an output shaft; and a controller configured to control an electric motor. The controller is configured to, when the impact tool is in a low-speed mode and it is detected that the impact mechanism applies an impact force to the output shaft, perform the operations periodically: determining that the impact mechanism impacts a preset number of times and controlling the electric motor to shut down for a preset period and then restart.

In one aspect, the present disclosure provides a robot gripper with a closing mechanism that while providing a desirable closing speed avoids exerting a force on the rigid object which is greater than the holding force required to hold the rigid object in the gripper. In another aspect, the present invention provides a robot gripper capable of detecting a slip or loss of an object held by the gripper. In an alternative aspect, the present invention provides a robot gripper capable of being hand guided. In another aspect, the invention provides a robot gripper brake drive circuit with faster operation. In one other aspect, the invention provides a connector for connecting a robot end effector to a robot arm with an adjustable cable.

Provided is an electric drum brake system, including: an electric drum brake configured to be driven by an electric motor; a current sensor configured to detect a current input to the electric motor; and a controller configured to, when parking is released, determine a parking release time based on a temperature of the electric drum brake, and when a maintenance time reaches the determined parking release time, end a parking release operation by stopping the electric motor, the maintenance time being a period of time while a state where a motor current detected by the current sensor reaches a target current is maintained.

A technical field of motor control, and a motor rotation control method and device. The method includes conducting inverse Park transformation and inverse Clark transformation to control output results of a position loop, a speed loop and a current loop to obtain SVPWM signals of a present cycle; decoupling an interrupt control cycle from a PWM signal reference channel; acquiring present position sampling information of a motor, and predicting the position sampling information to obtain position result information of a motor rotor in predicted cycles. In the motor rotation control method, an interrupt function trigger signal is added to realize decoupling from the PWM signal reference channel, so that SVPWM signal update frequency of motor control will not be affected when CPU load is reduced by adding an interrupt function scheduling cycle.

The utility model provides a mechanical arm power-down protection circuit and a sweeping robot, and relates to the technical field of motor control, the mechanical arm power-down protection circuit comprises a power supply module, a micro-control module, a relay and a mechanical arm control module, when the power supply module supplies power, a control end of the relay is electrified to control a common end to be conducted with a second connecting end, and the mechanical arm control module controls the micro-control module. The micro-control module controls the power supply module to be connected with the input end of the motor. When the power supply module is powered off, the control end of the relay is powered off, the common end is connected with the first connecting end, the input end of the motor is connected with the grounding end, and a coil of the motor forms loop current and generates resistance to slow down descending of the mechanical arm. By means of the automatic switching function of the relay, the connection state of the motor is rapidly switched when a power source is cut off, resistance is generated through the physical characteristics of the motor so as to slow down descending of the mechanical arm, the circuit structure is simple, cost is low, large installation space does not need to be occupied, and the circuit can be applied to mechanical arms of various sizes and models; and the method has a relatively wide application range.

A power tool is provided including: a tool housing; a motor disposed within the tool housing; a battery receptacle arranged to be coupled to a battery pack having a rated capacity; a power switch circuit disposed between the battery receptacle and the motor; and a controller that controls the power switch circuit to drive the motor. The controller is configured to: determine or receive a pack ID associated with the rated capacity of the battery pack; set a braking profile for electronically braking the motor based on the pack ID; and apply an electronic brake to the motor in accordance with the set braking profile upon detection of an event associated with stoppage of the motor.

A motor drive control device includes: a first input unit to which first current from the power source to the control unit is input; a first output unit that outputs the first current input from the first input unit to the control unit; a shutoff unit that is provided between the first input unit and the first output unit, and switches an output state of the first output unit; a second input unit to which second current from the control unit to the motor is input; a second output unit that outputs the second current input from the second input unit to the motor; and an arithmetic unit that is provided between the second input unit and the second output unit, and calculates a rotation speed of the motor.

In one aspect, the present disclosure provides a robot gripper with a closing mechanism that while providing a desirable closing speed avoids exerting a force on the rigid object which is greater than the holding force required to hold the rigid object in the gripper. In another aspect, the present invention provides a robot gripper capable of detecting a slip or loss of an object held by the gripper. In an alternative aspect, the present invention provides a robot gripper capable of being hand guided. In another aspect, the invention provides a robot gripper brake drive circuit with faster operation. In one other aspect, the invention provides a connector for connecting a robot end effector to a robot arm with an adjustable cable.

Bi-directional motor (36) for gas engine replacement device (10). One embodiment provides a gas engine replacement device (10) including a housing (14), a battery receptacle (54), a motor (36), a power take-off shaft (38) receiving torque from the motor (36), a power switching network (310) configured to selectively provide power to the motor (36), and an electronic processor (302) coupled to the power switching network (310). The electronic processor (302) is configured to rotate the motor (36) in a first direction and receive an input to switch a rotation direction of the motor (36). The electronic processor is also configured to control the power switching network (310) to stop the motor (36) and rotate the motor (36) in a second direction after controlling the power switching network (310) to stop the motor (36).

According to the brushless motor regenerative braking energy recovery circuit, after a motor is braked, energy is stored to a large capacitor with the capacity large enough, then the large capacitor is discharged for expiration of the motor, low-rotation-speed consumption use and inspiration consumption use in the next respiratory cycle are kept, the recovered energy is fully utilized, the energy is stored and used immediately, intermediate loss is avoided, and the energy recovery efficiency is improved. The power supply chip of the DC-DC power supply circuit of the motor does not work continuously but works intermittently, so that heat can be reduced, excessive heat of a board card chip, an inductor, an MOS and the like is avoided, and the problems that the conventional energy recovery in the market charges a battery after circuit conversion, the circuit is complicated, the conversion efficiency is low, and energy loss is caused, and the power supply chip needs to work continuously are solved. And the heating loss is large.

There is provided a control method of a household appliance (100), the household appliance (100) comprising a motor (120) driven by a driving current, the method comprising the steps of: receiving a stop signal for stopping the motor (120); executing an open brake control for stopping the supply of the drive current to the motor (120) on the basis of receiving the stop signal; estimating an initial motor speed of the motor at the start of the open brake control based on a motor phase current of the motor at the start of the open brake control; determining a start time of short-circuit brake control for applying torque in a direction opposite to a rotation direction of the motor based on the estimated initial motor speed; and executing short-circuit brake control at the determined short-circuit brake control start time.

In accordance with some embodiments, the present disclosure provides A brake system for braking a vehicle using one or both of a main braking system and a redundancy braking system, the brake system comprising: a brake demand detecting unit configured to detect a driver's brake demand; an electronic control unit comprising: a pressure controller configured to control a pressure inside a master cylinder in response to a value detected by the brake demand detecting unit, wherein the internal pressure of the master cylinder is controlled by generating an electrical signal for a first demand current; a motor position controller configured to control a position of a motor by generating an electrical signal for a second demand current; and a current controller configured to control the current of the motor in response to an electrical signal received from one of the motor position controller and the pressure controller; a position detecting unit configured to detect a position of a rotor of the motor; and a pressure detecting unit configured to sense the internal pressure of the master cylinder.

The invention discloses a method for safely controlling the braking torque of a driving system with a permanent magnet synchronous motor, the driving system is provided with the permanent magnet synchronous motor and a frequency converter, and the method is characterized by comprising the following steps: on the premise that a driving signal of an upper bridge arm switch tube is blocked, starting the frequency converter; a driving signal of a corresponding lower bridge arm switch tube when the phase current of the permanent magnet motor flows to a frequency converter is turned off in advance, and a driving signal of a corresponding upper bridge arm switch tube when the phase current of the permanent magnet motor flows out of the frequency converter is turned off in advance on the premise that the driving signal of the lower bridge arm switch tube is blocked. And the phase current of the permanent magnet synchronous motor is controlled. By alternately blocking the switch tubes of the upper bridge arm and the lower bridge arm, larger braking torque and smaller torque pulsation can be provided, heat dissipation of the IGBT / diodes is balanced, and meanwhile power supply from an intermediate circuit of the frequency converter to the permanent magnet motor is prevented.

The proposed solution relates to a drive device (1A, 1B), in particular for a vehicle seat (2), having a brushless DC motor, BLDC motor (10A, 10B), and a control unit (11A, 11B), wherein the control unit (11A, 11B) is configured: in a normal operating mode of the control unit (11A, 11B), by means of communication with a communication node (30, 11B) via an interface (110) of the control unit (11A, 11B), to receive control commands (410) and to control the BLDC motor (10A, 10B) on the basis of the received control commands (410); to recognize a disturbance of the communication with the communication node (30, 11B) via the interface (110) and / or a predefined input, and to switch to a maintenance mode in reaction to the recognized disturbance and / or the predefined input; and in the maintenance mode, to control the BLDC motor (10A, 10B) independently of communication with the communication node (30, 11B).

The invention provides a mechanical arm power-down protection circuit and a sweeping robot, and relates to the technical field of motor control, the mechanical arm power-down protection circuit comprises a power supply module, a micro-control module, a relay and a mechanical arm control module, when the power supply module supplies power, a control end of the relay is electrified to control a common end to be conducted with a second connecting end, and the mechanical arm control module controls the micro-control module; the micro-control module controls the power supply module to be connected with the input end of the motor. When the power supply module is powered off, the control end of the relay is powered off, the common end is connected with the first connecting end, the input end of the motor is connected with the grounding end, and a coil of the motor forms loop current and generates resistance to slow down descending of the mechanical arm. By means of the automatic switching function of the relay, the connection state of the motor is rapidly switched when a power source is cut off, resistance is generated through the physical characteristics of the motor so as to slow down descending of the mechanical arm, the circuit structure is simple, cost is low, large installation space does not need to be occupied, and the circuit can be applied to mechanical arms of various sizes and models; and the method has a relatively wide application range.

A vacuum pump system (300), comprising at least one vacuum pump (330, 360) each comprising: a rotor (331, 361); a motor (332, 362) configured to drive the rotor (331, 361); and a converter (333, 363) configured to supply electrical power to the motor (332, 362) to accelerate and decelerate the rotor (331, 361). Each converter (333, 363) is further configured to: operate the motor 10 (332, 362) in a generator or braking mode for a deceleration of the rotor (331, 361); and capture as a regenerated energy at least a portion of the kinetic energy of the rotor (312, 361) during the deceleration.

A motor control device includes a torque command calculation unit that calculates a torque command value, a current command calculation unit that calculates a current command value, a power converter, and a stop position adjuster. The stop position adjuster executes a stop position adjustment process that adjusts the rotation stop position within a specified position adjustment range when a lock current is applied while the rotation of the multiphase motor is stopped, except in cases where specified exemption requirement is met. In the stop position adjustment process, the stop position adjuster adjusts the rotation stop position so as to bias the current to one or more high heat dissipation phases having a relatively high heat dissipation property among the phases. The torque command calculation unit or the current command calculation unit calculates a torque command value or a current command value reflecting an adjusted rotation stop position.

The invention discloses a push rod limiting control device which comprises a motor and further comprises two Hall sensors, a motor control module and a magnet arranged on a push rod, the motor controls the push rod to move between the two Hall sensors, and when the push rod is close to a certain Hall sensor, the magnet on the push rod triggers the Hall sensors to change signals. The motor control module is triggered to work through change of signals of the Hall sensor, and the motor is controlled to stop running. A traditional switch is replaced with a Hall sensor induction mode, so that the push rod is simpler in overall structure, smaller in size and still applicable to some occasions with limited sizes.

A motor control device includes a torque command calculation unit that calculates a torque command value, a current command calculation unit that calculates a current command value, a power converter, and a stop position adjuster. The stop position adjuster executes a stop position adjustment process that adjusts the rotation stop position within a specified position adjustment range when a lock current is applied while the rotation of the multiphase motor is stopped, except in cases where specified exemption requirement is met. In a stop position adjustment process, the stop position adjuster adjusts the rotation stop position so as to reduce a current absolute value of a maximum current phase having a maximum current absolute value among the phases. The torque command calculation unit or the current command calculation unit calculates a torque command value or a current command value reflecting an adjusted rotation stop position.

The invention relates to a motor control circuit, method and module, a storage medium, a controller and a vehicle, and the motor control circuit comprises a detection circuit and a protection circuit. The detection circuit is used for detecting a detection parameter generated by the counter electromotive force generated by the motor; and the protection circuit is used for disconnecting the motor and the motor driving circuit when the detection parameter meets a first condition, so as to at least partially solve the problem that the ASC scheme cannot be directly executed, and the bus capacitor and the battery pack are reversely charged by overhigh counter electromotive force through the fly-wheel diode of the switching tube.

The invention discloses a DC motor anti-pinch control system and method based on PWM slope, and belongs to the technical field of motor control, and the system comprises an information collection module, a PWM slope calculation module, a PWM slope monitoring module, a current monitoring module, a speed monitoring module and a clamping state judgment module. The information acquisition module acquires a PWM signal, a current signal and a motor operation rotating speed for controlling the direct current motor; the PWM slope calculation module calculates the slope value of the PWM signal; the PWM slope monitoring module, the current monitoring module and the speed monitoring module are used for setting threshold values and monitoring data changes in real time; the clamping state judgment module judges whether the push rod is in a clamping state or not by analyzing monitoring results of the three data; the instantaneous change of the motor load is reflected by combining and analyzing current, rotating speed and PWM signal slope monitoring, the load change can be quickly detected, anti-pinch protection measures can be triggered in time, and the response speed and safety of the system are improved.

One aspect of the present disclosure provides an electric work machine including a brushless motor, a drive circuit, and a control circuit. The control circuit executes a driving operation, a braking operation, and a switching operation. In the driving operation, the brushless motor is rotated based on a back-EMF of the brushless motor. In the braking operation, a switch pair of six switches in the drive circuit is turned on, and the other four switches are turned off. The switching operation is performed during the braking operation. The switching operation includes switching the switch pair. In the switching operation, an off-target switch is turned off based on an electric current flowing through the off-target switch satisfying an off-requirement.

The invention discloses an electric tool and a control method thereof. The electric tool includes: a motor; the power supply device comprises a power supply and is arranged to at least supply power to the motor; the driving device is arranged to drive the motor to operate; the operation device is set to be operated by a user to switch the on-off state of the electric tool and output a corresponding on signal or off signal; the first controller is set to output a driving signal to the driving device when receiving the opening signal; the second controller is set to output a driving enable signal to the driving device when the starting signal is received; and the driving device is further arranged to drive the motor to operate when receiving the driving signal and the driving enable signal. Double guarantees are achieved through the double controllers, and the tool safety is improved.

The invention relates to the technical field of electro-hydrostatic actuators, and discloses an EHA driving and control integrated device based on a three-in-one integrated framework, which comprises a power conversion main loop part, a control auxiliary part and a motor M which are connected with one another, the power conversion main loop part comprises a soft start + capacitor, a SiC power component and a common mode inductor, the soft start + capacitor, the SiC power component and the common mode inductor are sequentially connected and are all connected with the control auxiliary part, and the common mode inductor is connected with the motor M; the control auxiliary part comprises an upper computer, an auxiliary power supply, an EHA controller and an actuator; the EHA controller is respectively connected with the upper computer, the auxiliary power supply, a soft start + capacitor, a SiC power assembly, the actuator and a motor M; according to the invention, the motor driving module, the EHA controller and the state monitoring module are integrated in a single shell, precise regulation and control from outside to inside are realized by adopting a three-closed-loop control architecture, the response delay of the system is reduced, and the advantages of compactness, high power density and quick response brought by integration, standardization and efficient heat dissipation design are highlighted.

DC motor (1) for operation in an external magnetic field comprising: a rotor (2) which is rotatable about an axis of rotation (5) and has at least two windings (10, 11), at least four continuous rotary transformers (3), two rotary transformers (3) being assigned to each of the windings (10, 11) and being designed to supply the respectively assigned winding (10, 11) with direct current, an angle sensor (4) designed to determine the angular position of the rotor (2), and a control unit (15) designed to control the current supply to at least one of the windings (10, 11) as a function of the angular position of the rotor (2), wherein the motor (1) is aligned with an external magnetic field during operation such that the axis of rotation (5) extends transversely to the external magnetic field.

A vacuum pump system (300), comprising at least one vacuum pump (330, 360) comprising: a rotor (331, 361); a motor (332, 362) configured to drive the rotor (331, 361 ); and a converter (333, 363) configured to supply electrical power to the motor (332, 362) to accelerate and decelerate the rotor (331, 361). The converter (333, 363) is further configured to: operate the motor (332, 362) in a generator or braking mode for a deceleration of the rotor (331, 361 ); and capture as a regenerated energy at least a portion of the kinetic energy of the rotor (312, 361) during the deceleration.

A method is provided for controlling a power tool that includes a motor having a rotor, a power switch circuit coupled to the motor, a trigger switch, and a controller configured to control a switching operation of the power switch circuit. The method includes providing drive signals for driving the power switch circuit by controlling a switching operation of the power switch circuit over a plurality of switching vectors, measuring a first current value of a single shunt element at a first time during a first vector and a second current value of the shunt element at a second time during a second vector, calculating phase currents of the motor based on the first and second current values, determining an angular position of the rotor based on the phase currents, and controlling a pulse-width modulation of the plurality of drive signals based on the angular position of the rotor.

The present application provides a control device of an electric motor, which can quickly and effectively stop at a specific position, thereby achieving further high-speed positioning. The control device of the electric motor is used for stopping a rotating shaft rotating at a specified speed at a specific position after a stop instruction, and comprises: a first time calculation unit, which calculates a first time for stopping the rotating shaft at a target stop position without changing the rotating direction according to a current speed, the target stop position and an acceleration at the time of positioning; a second time calculation unit, which calculates a second time for stopping the rotating shaft at the target stop position by rotating the rotating shaft in the reverse direction after temporarily stopping the rotation of the rotating shaft according to the current speed, the target stop position and the acceleration at the time of positioning; a comparison unit, which compares the first time with the second time; and a directional stop control unit, which performs stop control of the electric motor in a manner of shortening the time until the rotating shaft is stopped at the target stop position based on the comparison result of the comparison unit.