530 results about "Motor Drive Unit" patented technology

The invention belongs to the technical field of motor control, and discloses a control method of a motor for an inverter compressor, which comprises the following steps: embedding a distributed thermocouple array in a motor stator slot to acquire temperature data of the motor, synchronously acquiring operation parameters of the motor, generating a dynamic thermal field characteristic spectrum through a data fusion algorithm, coordinates of the hot spot areas with the temperature abnormally increased are marked, a dynamic correlation model is established, and heat conduction characteristic parameters in the dynamic correlation model are updated through a sliding window algorithm; outputting a predicted temperature rise curve through the dynamic correlation model, adjusting a PWM control strategy of the inverter, inputting the PWM control strategy to a motor driving unit to execute preliminary regulation and control, collecting feedback data to generate a multi-dimensional feedback feature vector, iteratively optimizing a combined weight of a switch interval compensation amount and a harmonic injection strategy through a gradient descent algorithm, and performing harmonic injection control. And a global optimal strategy considering the heat dissipation efficiency and the operation stability is formed, and the operation stability and the energy efficiency level of the inverter compressor under various working conditions are remarkably improved.

The present disclosure provides a hair clipper capable of reducing noise during use, and a motor block used in the hair clipper. The hair clipper according to the present disclosure includes rotary motor including motor drive unit and rotary shaft extending in a first direction, and motor drive unit includes bearing that supports rotary shaft in a state where clearance is provided between the bearing and peripheral surface of rotary shaft. The hair clipper also includes: shaft stopper that presses rotary shaft in at least one direction in directions intersecting the first direction to restrict shaft shaking during rotation of rotary shaft caused by clearance while allowing rotation of rotary shaft; and support part that supports shaft stopper.

The assisted steering unit includes a motor drive unit and a ring assembly constructed and arranged to couple to and rotate a steering wheel. The assisted steering unit may include a ring assembly where the ring assembly includes a housing, a ring gear disposed within the housing, an anti-rotation pin operatively engaged with the housing. The assisted steering unit may also include a motor drive unit (MDU) including a motor and a drive gear rotatably engaged with the motor. The ring assembly and motor drive unit are constructed and arranged to be releasably engaged to each other.

A motorized window treatment system may include a roller tube, a flexible material, a motor drive unit, and mounting brackets. The mounting brackets may include a stationary portion configured to be attached to a structure surrounding a window. The mounting brackets may include a movable portion configured to receive an end portion of a housing of a motor drive unit. The movable portion may be configured to operate the motorized window treatment between the operating position and the extended position in a circular-shaped path. A portion of the motor drive unit may be accessible when the motorized window treatment is in the extended position. The mounting brackets may include a stopping mechanism that is configured to prevent the motorized window treatment from extending beyond the extended position.

A power converting apparatus includes a rectifier unit that rectifies first alternating-current power supplied from a commercial power supply, a capacitor connected to an output end of the rectifier unit, an inverter connected across the capacitor to generate second alternating-current power and output the second alternating-current power to a motor, and a control unit that controls an operation of the inverter and an operation of the motor using a dq-rotational coordinate system rotating in synchronization with a rotor position of the motor. The control unit extracts multiple frequency components from a q-axis current pulsation, which is a pulsatile component of a q-axis current, and limits the amplitude value of each of the extracted frequency components to control the amplitude of the q-axis current pulsation.

An electronic device having a first housing, a second housing movable with respect to the first housing, a flexible display mounted on the second housing that is configured to be inserted into or ejected from the first housing. The electronic device also includes a motor driving unit for moving the second housing, a memory for storing executable instructions, and at least one processor accessing the memory to execute the instructions. The processor outputs a control signal to the motor driving unit upon receiving a first signal, compares a measurement value related to the movement of the motor driving unit with a preset reference value, determines whether calibration of the motor driving unit is necessary based on the comparison, and provides a user notification if calibration is needed.

A gripping device includes a motor, a detector configured to detect a position and a speed of a rotary shaft of the motor, a motor drive unit configured to supply power by which the motor is driven based on a current control value and to detect a magnitude of a current provided to the motor, a grasper configured to grip an object with a first finger and a second finger by changing a distance between the first finger and the second finger in accordance with rotation of the motor, a force detector configured to detect a grip force that enables the object to be gripped by the first finger and the second finger, and a controller configured to control the current control value such that a value of the detected grip force matches a force command value.

The utility model relates to the technical field of new energy automobile charging, and discloses a mobile energy storage charging robot, which comprises a robot body, a charging pile and a platform dispatching system, and is characterized in that the robot body is provided with a high-capacity energy storage battery pack, a motor driving unit and an electric drive chassis; a charger, a charging and discharging switching controller and an anti-backflow terminal are arranged in the charging pile, the robot body is used for charging a new energy automobile, the charging pile is used for automatically switching to charge the robot body and receiving discharging of the robot body, and the platform dispatching system is used for managing resource distribution of the robot body and the charging pile of each city; according to the invention, the charging convenience and user experience are greatly improved, the problem of insufficient charging facilities is effectively relieved, the utilization rate of electric power resources is improved, deep fusion of new energy vehicles and smart grids is promoted, and an innovative solution is provided for promoting green travel and constructing a smart energy ecological system.

A motorized window treatment may include a roller tube, a motor drive unit, a mounting bracket, and a connector. The roller tube may have a flexible material attached thereto. The roller tube may have first and second ends. The roller tube may be configured to rotate about a longitudinal axis that defines a longitudinal direction. The motor drive unit may be configured to rotate the roller tube to adjust the flexible material between a raised position and a lowered position. The motor drive unit may include an end portion that is accessible via the first end of the roller tube. The connector may be configured to be disposed in the channel. The connector may be configured to electrically connect the motor drive unit to electrical wiring for powering the motor drive unit when the end portion of the motor drive unit is received within the channel.

A power conversion apparatus includes a converter that rectifies a first AC voltage supplied from an AC source, a capacitor that is connected to an output end of the converter and smooths a first DC voltage rectified by the converter into a second DC voltage including a first ripple, an inverter that is connected across the capacitor and converts the second DC voltage into a second AC voltage corresponding to a desired frequency, and a voltage detection unit that acquires a physical quantity correlated with the second DC voltage, and controls the second AC voltage to superimpose a second ripple correlated with the first ripple on an output voltage of the inverter.

A power converting apparatus includes a rectifier unit that rectifies a supply voltage applied from a commercial power supply, a capacitor connected to an output end of the rectifier unit, an inverter that converts direct-current power output from the capacitor into alternating-current power and outputs the alternating-current power to a device including a motor, current detection units that detect a power state of the capacitor, and a control unit that performs, by controlling the inverter, load pulsation compensation and power-supply pulsation compensation and adjusts a degree of at least one of the load pulsation compensation and the power-supply pulsation compensation on a basis of detection values of the current detection units. The load pulsation compensation is performed to compensate a load pulsation in a load unit including the inverter and the device. The power-supply pulsation compensation is performed to compensate a power-supply pulsation in the load unit.

Steering wheel control device of an SBW (steer-by-wire) system (20), comprising: a dominant control (10) configured to generate a start-up signal while a vehicle's ignition switch is off; a motor drive unit (27) configured to generate a steering reaction force against a steering wheel (22) by means of a motor; and a steering wheel control configured to generate the steering reaction force to affect the steering wheel rotation by controlling the motor drive unit (27) according to the start-up signal, wherein the steering wheel control short-circuits a phase of the motor via the motor drive unit (27) to generate an electromotive counterforce against the motor when the steering wheel (22) is turned by an external force, characterized in that that the dominant control (10) generates the start-up signal when a smart key is pressed while the ignition switch is off, or when a vehicle door handle is pressed to open a door while the ignition switch is off.

A power conversion device includes a rectification unit that rectifies first alternating current (AC) power supplied from a commercial power supply, a capacitor connected to an output end of the rectification unit, an inverter that converts power output from the rectification unit and from the capacitor into second AC power, and outputs the second AC power to a load including a motor, which inverter is connected to both ends of the capacitor, and a control unit that controls operation of the inverter to output the second AC power from the inverter to the load to reduce current flowing to the capacitor, which second AC power includes a pulsation that depends on a pulsation of power flowing from the rectification unit to the capacitor. No discharge circuit and no overvoltage protection circuit are provided for the capacitor.

The present invention relates to a dual-motor two-speed non-power-interruption electric drive bridge, comprising a differential, an output shaft, and a motor drive unit; the output shaft comprises a left output half shaft and a right output half shaft, the differential has an input end and two output ends, one of the output ends is connected to the left output half shaft, and the other output end is connected to the right output half shaft, and the input end of the differential is connected to an intermediate shaft gear; the motor drive unit comprises two motor drive assemblies arranged in parallel on both sides of the output shaft, the motor drive assembly comprises a drive motor, a compound planetary gear, and a high-low gear reduction mechanism; the two high-low gear reduction mechanisms are both meshed with the intermediate shaft gear. Two sets of motor drive units respectively arranged on both sides of the output shaft are used to realize the input to the output shaft, and the two sets of motor drive units are independently operated. When one set of the motor drive units shifts gears, the other set still maintains the input to the output shaft, and sequential shifting is performed, thereby realizing the purpose of non-power interruption during the shifting process.

The invention relates to the technical field of 3D printing equipment monitoring, and discloses a flow monitoring method and system for a wire feeding mechanism of a 3D printer, and the method comprises the steps: collecting current signal data of a wire feeding motor drive unit, and carrying out the preprocessing of the current signal data; performing time-frequency analysis on the standardized current characteristic data by using a multi-scale signal analysis algorithm, outputting a high-dimensional current characteristic set, and establishing a characteristic fault mapping relation; a multi-model fault analysis system is adopted to process the high-dimensional current feature set, and fault analysis and positioning are carried out; a progressive three-level early warning mechanism and flow monitoring are realized, and a current flow mapping model is established; continuously optimizing the flow model and the fault identification model, and establishing a dynamically updated fault feature library; wire feeding flow monitoring can be achieved without an additional sensor, and system cost and complexity are reduced.

The present application relates to an intelligent knee joint for human lower limb exoskeleton, prosthesis, or orthosis. The intelligent knee joint reproduces part or all of the biomechanical characteristics of the human knee joint by adopting a motor drive unit in combination with a controllable spring energy storage unit based on a magnetorheological damper, or adopts a controllable resistance unit in combination with a controllable elastic energy storage unit based on a magnetorheological damper, thereby helping the wearer to better reduce the burden of walking and regain or repair the walking function. The motor drive unit operates in generator mode and driver mode, and the energy recovery technology is used to reduce the power consumption of the intelligent knee joint and extend the working time of the device. In addition, the use of a controllable elastic energy storage unit based on a magnetorheological damper further reduces the energy consumption of the intelligent knee joint, while also simplifying the control difficulty of the knee joint.

The invention provides a headlamp position adjusting system based on ripple waves of a brush direct-current motor. The headlamp position adjusting system comprises a whole vehicle height sensor and a steering angle sensor, wherein the whole vehicle height sensor and the steering angle sensor are used for collecting vehicle height and steering data in real time; the MCU control unit receives data of the whole vehicle height sensor and the rotation angle sensor and calculates the number of target rotation turns of the motor and the number of corresponding ripple pulses; the motor driving unit drives the brush direct current motor to operate; the current acquisition circuit acquires a ripple signal in the running current of the motor; the direct-current filter circuit filters direct-current components in the current signals; the ripple amplifying circuit amplifies the filtered alternating current ripple signal; and the ripple conversion circuit converts the amplified ripple signal into a pulse signal which can be identified by the MCU. The brush direct current motor is adopted to replace a traditional stepping motor, a drive circuit only needs a single full bridge, and the hardware cost is reduced by about 50%; a control circuit and a shielding wire harness in the motor are omitted, and the number of wire harnesses and connectors and the manufacturing cost are reduced.

The invention provides an intelligent infusion flow rate accurate control system and method special for children, and relates to the technical field of clinical treatment. The intelligent flow rate accurate control system special for child infusion comprises an infusion control module used for controlling the flow rate of an infusion pump and comprising a motor driving unit and a flow rate sensor; the data acquisition module is used for acquiring relevant parameters of the body weight, age and illness state of the child and monitoring the infusion flow rate and the residual liquid amount in real time; the intelligent calculation module is used for calculating the optimal infusion flow rate according to the collected data in combination with preset infusion rules and algorithms; the user interface module provides a human-computer interaction interface for medical staff to input parameters and check infusion states; and the alarm module is used for sending out an alarm signal when an abnormal condition occurs in the infusion process. Through the automatic control process, the medical staff can concentrate on other important nursing work, the working efficiency is improved, the workload of manually adjusting the flow rate by the medical staff is reduced, and the risk of human errors is reduced.

Photovoltaic electric control shutter hollow glass externally connected with a control box comprises a window body, a shutter blind, an electric driving device, a photovoltaic assembly and a receiver, the shutter blind is arranged in the window body, the electric driving device is arranged in an upper frame of the window body and used for driving the shutter blind to complete lifting and overturning, and the electric driving device is electrically connected with the wireless receiver; the receiver comprises a bottom box, a box cover and a main control circuit board, the main control circuit board is provided with a microprocessor, a power management unit, a photovoltaic charging management unit, a motor driving unit, a wireless signal receiving and processing unit, a key unit and an indicator light unit, and the photovoltaic charging management unit is electrically connected with the photovoltaic module; the wireless receiving device is installed in the upper frame of the hollow glass, the control key box which is externally connected and installed in a lower mode is adopted, the appearance of the hollow shutter glass can be neat, the key control box can be disassembled and assembled according to needs to be debugged and operated, the set height of the control key box better conforms to the using habit of a user, and operation is more convenient.

The invention discloses a pipeline booster compressor inlet guide vane self-adaptive control method which comprises a compressor, the compressor is driven by a main motor, the main motor is controlled by a motor driving unit, an inlet guide vane, a flow sensor and an inlet pressure sensor are installed on an inlet pipeline of the compressor, and the inlet guide vane is controlled by a guide vane driver. An outlet pipeline of the compressor is provided with an outlet pressure sensor; the motor driving unit, the inlet flow sensor, the inlet pressure sensor, the outlet pressure sensor and the guide vane driving unit are all connected with a control unit; according to the method, the principle that when provided steam pressure and pipeline back pressure are not changed, the opening degree of a guide vane is increased, and the flow of a compressor is reduced is utilized. The mode of controlling the opening degree of the inlet guide vane is adopted, when external interference occurs, the working point is automatically changed, self-adaption to constant flow adjustment, overload adjustment and anti-surge adjustment can be achieved, operation of operators is reduced, the shutdown frequency of the compressor is effectively reduced, and the service life of the compressor is prolonged.

The invention relates to a liquid cooling cabinet and a server lifting control method.The liquid cooling cabinet comprises a cabinet body, the cabinet body is provided with a lead screw assembly and a motor driving unit, the lead screw assembly comprises a lead screw nut and a lead screw rod which are matched with each other, an output shaft of the motor driving unit is connected with the lead screw rod, and the motor driving unit is connected with the lead screw nut. A lead screw nut is arranged on the cabinet body, a lifting support is arranged on the lead screw nut, a sub-server is arranged on the lifting support, a containing cavity is formed in the cabinet body, and the sub-server is driven by the lifting support to move towards the interior of the containing cavity or move out of the containing cavity. According to the invention, automatic lifting of the sub-server is realized, maintenance personnel do not need to manually take out the sub-server from the liquid cooling cabinet and do not need to manually place the sub-server into the liquid cooling cabinet, and the maintenance efficiency is effectively improved for the sub-server with large size and heavy weight.

The invention discloses an unmanned aerial vehicle parachute throwing device, and belongs to the technical field of unmanned aerial vehicle equipment. Comprising a fault detection module, a trigger control module, a dual-power release module, a parachute storage module, a flight control cooperation module and a parachute ejection mechanism which are installed in an unmanned aerial vehicle body. A fault judgment algorithm is built in the trigger control module; the parachute ejection mechanism comprises an ejection shaft, the lower end of the ejection shaft is connected with a force storage assembly, the ejection shaft is sleeved with a limiting protruding ring, and a limiting column is arranged on one side of the limiting protruding ring and matched with the motor driving unit. The three-axis acceleration sensor, the air pressure sensor, the motor rotating speed sensor and the current sensor are integrated, a synchronous acquisition and automatic switching mechanism of the main sensor and the standby sensor is matched, acquisition interruption caused by faults of a single sensor is avoided, and data acquisition continuity is high. Instantaneous impact force is provided through compressed gas driving, the push rod is driven to be accurately unlocked through gear transmission, and the problems that traditional single power thrust is insufficient and release is slow are solved in cooperation with the double-spring force storage assembly.

The invention relates to a multi-functional shaft adapter (16) for a locking device (SV) provided for mounting at a motor power unit (EM-AE). In this case, the shaft adapter (16) can be connected to a lockable shaft (W) of the motor drive unit (EM-AE) and is essentially made of plastic, in which shaft adapter contact elements for externally exciting a rotor of a synchronous motor of the motor drive unit (EM-AE) connected to the shaft (W) are embedded, and in which shaft adapter contact elements for externally exciting a rotor of a synchronous motor of the motor drive unit (EM-AE) connected to the shaft (W) are inserted. The shaft adapter is also integrally connected to a form-fitting element (6) for connection to a shaft (W). The invention further relates to a locking device (SV) having such a multifunctional axle adapter (16), to an electric motor drive unit (EM-AE), in particular for driving a vehicle having such a locking device (SV), and to a vehicle having such an electric motor drive unit (EM-AE).

A motorized window treatment system includes a motor drive unit physically coupled to a lift assistance subsystem. The lift assistance subsystem provides variable lift assistance to the motor drive unit for raising and lowering a covering material. The lift assistance subsystem includes a gradient spring that travels between a drive drum coupled to the motor drive unit and a storage drum disposed in a housing. A gradient spring travels between the drive drum and the storage drum to provide lift assistance and reduce the input power requirement for the motor drive unit. The housing includes a plurality of spring guide features disposed on an internal surface of the housing.

A power swivel device for a vehicle seat is configured to perform both swivel and monopost functions of the vehicle seat. The power swivel device includes a motor configured to swivel the seat and a reduction gear device configured to increase output torque of the motor, which are stacked in a vertical direction on a bottom of the seat. The power swivel device includes a lower housing; an upper housing stacked on and assembled to the lower housing; an eccentric shaft rotatably disposed relative to the lower housing and the upper housing; a motor driving unit mounted between the lower housing and the eccentric shaft; the reduction gear device installed between the upper housing and the eccentric shaft; and a swivel plate rotatably mounted on the reduction gear device and connected to a seat cushion frame.

A motorized window treatment may include a covering material, a motor drive unit, a headrail, a cover, and one or more mounting brackets. The cover may be configured to enclose at least an upper portion and a rear portion of the headrail. The mounting brackets may be configured to secure the motorized window treatment to a structure. The mounting brackets may include a biasing member that is configured to engage a lower lip of the cover to bias the respective mounting bracket toward the top plate of the cover. The mounting brackets may include a release button that is configured to extend through a gap between the headrail and the top plate of the cover. The release button may be configured to be operated to adjust the motorized window treatment into a service position in which access is provided to at least one battery within the headrail.

The present disclosure provides a stepping motor abnormality detection device capable of detecting an abnormality of a stepping motor. The stepping motor abnormality detection device (100) includes a power supply unit (1), a stepping motor (4), a stepping motor drive unit (3), a determination unit (5), and a control unit (6). The stepping motor drive unit (3) causes the stepping motor (4) to operate by the control unit (6). A current level detection unit (2) acquires a current level during driving of the stepping motor (4) and compares the acquired current level with a threshold value determined in advance by the determination unit (5) to detect an abnormality of the stepping motor (4).

The present invention discloses an electro-hydraulic hybrid driving method, system, power head and rotary drilling rig, the system comprising: a motor drive unit and a hydraulic motor drive unit are respectively mechanically connected to the power head transmission box, the motor drive unit and the motor floating control unit are connected by wires, and the hydraulic motor drive unit and the hydraulic motor floating control unit are connected by hydraulic pipelines. Generally, only the hydraulic motor drive unit is in a floating state, and the power head transmission box is independently driven by the motor drive unit; when the power head needs to output a large torque, the floating states of the two drive units are released, and the power head transmission box is compositely driven by the motor drive unit and the hydraulic motor drive unit; when the power head needs to dump soil, only the motor drive unit is in a floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit. This system enables the power head to have the characteristics of high efficiency of motor drive, large torque of hybrid drive, and good soil dumping performance of hydraulic drive.

The utility model discloses a light electric single-wheel balance car driven by an external motor. The light electric single-wheel balance car comprises an electric control and seat cushion unit, a suspension lower movable unit, a motor driving unit, a shock absorber, a battery pack unit, a wheel set unit, a pedal and the like. A high-speed motor is used for speed reduction through a gear and power transmission through a constant velocity universal joint, and finally a belt speed reducer is used for driving a wheel set to rotate, so that modular power layout is achieved. Due to the fact that the power / weight ratio of the high-rotating-speed motor is larger, the total weight of the vehicle can be effectively reduced. The suspension structure of the triangular double shock absorbers can reduce the number of components. The upper half part of the universal coupling is fixed in the shell of the driving unit, the lower half sliding part of the universal coupling is positioned below the damping system spring, and the motor is fixedly mounted through the expansion joint of the universal coupling, so that the power unit does not move along with the suspension. Due to the adoption of the modularized structure, the disassembly and maintenance are convenient, and the reassembly and combination are simple and convenient. The last stage adopts belt transmission, noise is reduced, and maintenance is convenient.