4001 results about "Rotor (electric)" patented technology

The invention discloses a detection system for operation abnormity of an electric drive axle motor of a new energy commercial vehicle, and belongs to the technical field of motor abnormity detection. The system comprises a multi-source sensing module, a dynamic coupling analysis module, a harmonic distortion traceability module, a dynamic stability analysis module, an anomaly fusion decision module, a self-adaptive threshold generation module and a fault tree reasoning module. Multi-dimensional signals such as current, vibration, temperature and a rotor position angle are synchronously acquired through the multi-source sensing module, and multi-physics field collaborative analysis is performed through the dynamic coupling analysis module and the harmonic distortion traceability module, so that the fault diagnosis accuracy of operation abnormity of the electric drive axle motor of the new energy commercial vehicle is improved; the problem that in the prior art, detection only depends on a single physical quantity, and misjudgment or missing detection is easily caused by interference is solved.

An autonomous flying device achieving a large payload and a long continuous flight time and also accurately adjust position and orientation while flying. The device includes: a main rotor and the like that provide main thrust; a sub rotor and the like that controls the orientation; an engine that generates energy for rotating the main rotor and the like and the sub rotor and the like; and an arithmetic control device that controls rotation of the sub rotor and the like. Also, the main rotor and the like are rotated by being drivingly connected to the engine, whereas the sub rotor and the like are rotated by motors driven by electric power generated from generator and the like operated by the engine. Further, when orientation control to tilt the fuselage is performed, the arithmetic control device increases the output distribution ratio of the sub rotor to above the output distribution ratio of the sub rotor when hovering is performed.

The invention relates to the technical field of electric vehicle transmission and control, in particular to an electric vehicle speed reducer parking motor position feedback system. The system aims at solving the problems that the position feedback precision is reduced, the reliability is insufficient and the redundancy is deficient in a severe environment in the existing scheme. According to the system, through redundancy design of a main position sensing module (a magnetoelectric encoder) and an auxiliary position sensing module (an inductive sensor) and in combination with a multi-source data fusion module (based on Kalman filtering), anomaly detection and fault tolerance, position prediction and compensation and a temperature compensation and self-adaptive calibration mechanism, accurate feedback of the position of the parking motor rotor is achieved. According to the system, the accuracy and robustness of position feedback and the reliability of the system can be remarkably improved, the service life of a parking mechanism is prolonged, and the parking safety is improved.

An unmanned aerial vehicle includes a plurality of rotors, a plurality of electric motors each configured to drive a respective one of the plurality of rotors, a power source, and a controller configured or programmed to control supply of first electric power from the power source to the plurality of electric motors and supply of second electric power from the power source to an external implement, and control operation of the plurality of electric motors. Upon detecting an abnormality in equipment included in the unmanned aerial vehicle, the controller is configured or programmed to stop the supply of the second electric power to the implement and maintain the supply of the first electric power to the plurality of electric motors to execute flight using the plurality of rotors.

The present application provides a reverse-type integrated miniature linear servo electric cylinder. An open end of a rotor housing in a power transmission mechanism is fixedly connected to a planetary carrier by means of a coupling, the planetary carrier is directly driven by means of integration of the motor rotor housing and the planetary carrier, and after power transmission via the planetary carrier, an output end is directly driven to achieve linear motion without adding a gear reduction mechanism to a power transmission system of the electric cylinder, thereby significantly reducing the internal space of the electric cylinder occupied by the power transmission mechanism, allowing the electric cylinder to develop to have a more miniaturized and compact structure, saving costs; moreover, the energy utilization rate of the electric cylinder is improved, the electric energy consumption of the electric cylinder is reduced, and relatively good economic benefits can be yielded.

The invention provides a dual-motor synchronous coordination control method of an electric helicopter, which comprises the following steps: taking a first controller as a main control motor driving system, and establishing a rotor rotating speed reference by adopting a rotating speed loop control strategy; and the second controller serves as a slave control motor driving system, a torque loop control strategy is adopted, and load disturbance is estimated and compensated in real time through the extended state observer. According to the dual-redundancy motor driving system, mechanical coupling interference is effectively inhibited, the fault tolerance of the system is enhanced, a feasible technical scheme is provided for safe flight of the electric helicopter, and the dual-redundancy motor driving system has important application value.

The invention belongs to the technical field of aircraft design, and particularly relates to an integrated tilting power system integrated with hydrogen fuel cell motor electric control and an aircraft. Comprising a tilting mechanism connected with a machine body; the integrated motor and controller is fixedly connected with the tilting mechanism and located at the end, close to the upstream of the incoming flow, of the tilting mechanism; the tilting rotor wing is mounted at one end, close to the incoming flow upstream, of the integrated motor and controller; the hydrogen fuel cell is fixedly connected with the tilting mechanism and is positioned at one end, close to the downstream of the incoming flow, of the tilting mechanism; the nacelle shell wraps the tilting mechanism, the integrated motor, the controller and the hydrogen fuel cell; the nacelle outer heat dissipation fins wrap the nacelle in the circumferential direction; and the tilting mechanism, the integrated motor and controller and the liquid cooling radiating pipeline of the hydrogen fuel cell exchange heat with the radiating fins outside the nacelle.

Apparatus, systems, and methods are contemplated for electric powered vertical takeoff and landing (eVTOL) aircraft. Such are craft are engineered to carry safely carry at least 500 pounds (approx. 227 kg) using a few (e.g., 2-4) rotors, generally variable speed rigid (non-articulated) rotors. It is contemplated that one or more rotors generate a significant amount of lift (e.g., 70%) during rotorborne flight (e.g., vertical takeoff, hover, etc), and tilt to provide forward propulsion during wingborne flight. The rotors preferably employ individual blade control, and are battery powered. The vehicle preferably flies in an autopilot or pilotless mode and has a relatively small (e.g., less than 45′ diameter) footprint.

The invention relates to an automatic press-fitting system for a rotor and a spline shaft, which is characterized in that a laser sensor is used for detecting the reflected light intensity difference of a tooth crest and a tooth groove, and a PLC (Programmable Logic Controller) calculates the angular deviation of the spline shaft in real time based on a difference signal and generates a rotation instruction; after receiving the instruction, the servo motor drives the spline shaft to adjust at a certain increment angle; the suction cup tool sucks the rotor end face through a vacuum suction cup and moves to the position coaxial with the spline shaft; and the servo press drives the rotor to press with constant pressure, the PLC synchronously analyzes the press-in force and displacement, when the displacement reaches a preset range, it is judged that meshing succeeds, and when the displacement does not reach the preset range, it is judged that tooth crest interference occurs, and a reverse rotation correction process is triggered. The system can realize high-precision angle detection and dynamic correction, improves the one-time success rate of engagement of the spline shaft and the rotor, is suitable for precision assembly scenes such as a new energy automobile electric drive system and an industrial speed reducer, effectively reduces the manual intervention cost, and improves the production takt time stability.

The invention discloses a magnetic adjusting assembly, a motor, an electric drive system and a vehicle, and the magnetic adjusting assembly comprises a magnetic conductive part which is suitable for being movably disposed on one side of a rotor in the radial direction, so as to adjust the magnetic flux passing through the rotor. According to the magnetic adjusting assembly, the magnetic flux passing through the rotor is adjusted to change the magnetic flux of the magnetic flux short-circuit loop formed by the magnetic conductive piece and the rotor, so that the adjustment of the magnetic flux of the main magnetic field is realized, the adjustment is convenient, and the motor applying the magnetic adjusting assembly has the advantages of a constant torque area and a constant power area; and a constant-power operation region and a high-efficiency region are effectively widened while high torque density and power density are ensured.

An electromechanical stretching apparatus of a convertible sofa consisting of a mechanical stretching apparatus and an electric actuator, the mechanical stretching apparatus provided with an electrically-driven connecting rod, where the electric actuator consists of a motor, a motor connecting tube, a motor movable slider, and a motor head fixing part, the motor adopted is a motor with a guide rail, the motor movable slider is installed on the guide rail of the motor, the motor head is rotationally connected through a second rotor shaft to the motor head fixing part fastened on the electrically-driven connecting rod, the motor connecting tube is connected to the motor movable slider through a first rotor shaft and the motor connecting tube is fastened on the mechanical stretching apparatus. The motor connecting tube is fastened on a linkage part of the mechanical stretching apparatus. The first and second rotor shaft are both a bolt.

A self-excitation motor disclosed by the present invention comprises a rotor, a first end of the rotor is equipped with a rectification circuit, the rotor comprises a rotor iron core and a plurality of harmonic windings and excitation windings, the rotor iron core is provided with rotor teeth, and each harmonic winding and each excitation winding are respectively wound on the corresponding rotor teeth. Each harmonic winding comprises a first harmonic winding and a second harmonic winding, the winding directions of the first harmonic winding and the second harmonic winding are the same, star connection is adopted, one ends of the first harmonic winding and the second harmonic winding are connected in series in a one-to-one mode, and the other ends of the first harmonic winding and the second harmonic winding are jointly connected to form a star neutral point; the other end of each second harmonic winding is connected with the midpoint of each bridge arm in the rectifying circuit in a one-to-one manner; the winding directions of the excitation windings on every two adjacent rotor teeth are opposite, and the two ends of each excitation winding are electrically connected with the direct current output end of the rectification circuit. This induces and rectifies the current for excitation more efficiently. The invention further provides a motor control strategy based on high-frequency harmonic current phase optimization.

The invention relates to the technical field of motor control, discloses a direct current brushless motor control method and system based on current prediction, and aims to solve the problems of large torque ripple, low efficiency and poor stability caused by current loop lag in the prior art. The method comprises the following steps: acquiring a motor operation state signal in real time; determining a sector and an electrical angular velocity based on the rotor position and the rotational speed; inputting related parameters into the mixed current prediction model to obtain a three-phase current prediction value of the next period; a prediction error is calculated in combination with a current instruction, and an optimal voltage vector enabling a cost function to be minimum is solved through a model prediction control algorithm; and finally, a space vector pulse width modulation signal is generated to drive an inverter. According to the method, advanced control is realized by fusing a physical model and a data-driven prediction mechanism, the torque ripple is remarkably reduced, and the energy efficiency and robustness are improved.

An electric propulsion system includes a fan rotor assembly having a first fan portion and a second fan portion. A fan cowling defines a first flow passage and a second flow passage. An electric drive mechanism drives the fan rotor assembly. An electric drive cooling system includes a liquid coolant that provides cooling to at least a part of the electric drive mechanism, and a heat exchanger through which the liquid coolant flows is arranged within the second flow passage. The first fan portion provides a first flow of air through the first flow passage to provide at least one of a lifting force or a thrust force to the electric propulsion system, and the second fan portion provides a second flow of air through the second flow passage to provide a flow of cooling air therethrough that is in thermal communication with the heat exchanger.

The invention relates to the technical field of fireproof equipment, in particular to an electrically-driven translation type heavy fireproof door which comprises a door body, a driving mechanism and a translation mechanism. The translation mechanism comprises a translation base and a nut sleeve, a mounting hole and a guide hole which penetrate through the two sides of the translation base are formed in the translation base, the nut sleeve and the lead screw form a thread transmission pair, the nut sleeve is rotatably mounted in the mounting hole, the guide rod is slidably connected in the guide hole, and a synchronous assembly is arranged in the translation base; when the door body moves to the tail end of the stroke, the circumferential constraint of the synchronous assembly on the nut sleeve is automatically relieved, so that the nut sleeve can freely rotate relative to the translation base. Therefore, the motor and the transmission system do not need to overcome the huge inertia of the door body to achieve forced stopping, the instantaneous load and locked-rotor risk of the motor are remarkably reduced, and meanwhile the impact stress borne by a mechanical transmission part at the terminal is greatly relieved.

The invention relates to a machining tool, in particular to a combined machining tool for helicopter spare and accessory part production. Comprising a machine frame, a shell and a drilling mechanism, the outer side of the machine frame is connected with the shell, the drilling mechanism is installed in the middle of the top of the machine frame, the grinding mechanism is connected to one side of the machine frame and used for grinding the inner wall of the rotor wing shaft, and the electric guide rail is installed on the upper portion of the machine frame; an adjustable clamp is installed on a moving part of the electric guide rail and used for clamping a rotor shaft and can drive the rotor shaft to rotate so as to adjust the drilling angle, the electric guide rail is used for driving the rotor shaft to move to conduct drilling and inner wall polishing operation in sequence, and a chip removal assembly is arranged between the rack and the adjustable clamp. The drilling mechanism, the polishing mechanism, the electric guide rail and the adjustable clamp are integrated in the same rack and shell structure, and integrated continuous operation of drilling of the rotor shaft and polishing of the inner wall is achieved.

A rotary drive assembly of an electric nail gun, comprising a support seat configured on a gun frame, an inner-rotor brushless DC motor and a flywheel configured inside the support seat in a coaxial manner. Along an assembly axial direction, the support seat is formed with a motor housing chamber to house the brushless DC motor and a flywheel housing chamber to house the flywheel, the two chambers being separated from each other. The motor housing chamber is formed with an axial port for assembly and heat dissipation of the brushless DC motor. The flywheel housing chamber is formed with a radial port to expose part of the flywheel outside the support seat. The axial port is perpendicular to the radial port. The invention can simplify the structure of the rotary drive assembly and facilitate its assembly and heat dissipation.

A bearing assembly includes an annular carrier, an outer ring disposed within the carrier, the outer ring having an outer raceway and a transmitter coil spaced axially from the outer raceway. The transmitter coil is electrically connectable with a battery and is configured to generate an electromagnetic field when current flows through the transmitter coil. An inner ring is disposable about a rotor shaft and has an inner raceway and a receiver coil spaced axially from the inner raceway so as to be located proximal to and inductively coupled with the transmitter coil such that electric current is generated within the receiver coil when current flows through the transmitter coil. The receiver coil is connected to electromagnetic coils of a motor rotor such that electric current flows from receiver coil to the coils. A plurality of rolling elements are disposed between rotatably couple the outer ring with the inner ring.

The invention discloses an energy-saving air conditioner fan circulating water pump and a control method, and relates to the technical field of energy-saving household appliances, and the energy-saving air conditioner fan circulating water pump comprises a motor, a peristaltic pump shell, a peristaltic pump rotor and a centrifugal pump shell. The front end of the motor output shaft is connected with a fan; a plurality of extrusion wheels are arranged on the peripheral side of the peristaltic pump rotor, when the peristaltic pump rotor is in a first state, the extrusion wheels are matched with the peristaltic pump shell to extrude the elastic hose, the peristaltic pump rotor is in transmission connection with the output shaft, and when the peristaltic pump rotor is in a second state, the peristaltic pump rotor is separated from the output shaft; the extrusion wheel is separated from the elastic hose, the centrifugal pump shell is connected to the rear end of the peristaltic pump shell, an impeller is arranged in the centrifugal pump shell and connected to the rear end of the output shaft, the centrifugal pump shell is connected with a first water inlet pipe and a first water outlet pipe, and the first water outlet pipe is communicated with the water inlet end of the elastic hose. According to the centrifugal pump, one motor can be used for driving the fan and the impeller in the centrifugal pump shell, and energy consumption is reduced.

There is disclosed a multirotor UAV in which electric motors are arranged to drive propellors under the control of an on-board flight controller. The UAV has a plurality of sensors and a first processor for providing sensor signals to the flight controller in normal mode of in-flight operation. The UAV has a three-dimensional depth scanner and a further data processor for processing the three-dimensional depth scanner, wherein the further data processor is selectively activated to process the three-dimensional depth scanner data in a second mode of in-flight operation when fling in close proximity to an external structure. The further data processor creates a three-dimensional map of the external structure for control of the flight of the UAV proximate thereto. The UAV can operate in a GPS-denied and / or compass-denied mode. One or more sensor can detect a profile of an external structure within a predetermined vicinity of the UAV. A depth sensor can detect a visible feature in the environment. The control system is operable to log the visible feature as reference point and to determine yaw readings for use by the flight controller relative to said reference point. The control system comprising can receive the outputs of the distance scanning sensor and the location determining system and can define a mapping boundary around a current position of the UAV. The mapping boundary is of a defined size that is smaller than the scanning range of the position scanning sensor. The data processor generates a map of any surfaces within the mapping boundary and the flight controller is arranged to output control instructions for control of the propulsive rotors based upon the map.

The invention relates to the technical field of motor detection, in particular to a generator set fault diagnosis and detection method based on deep learning, and the method comprises the steps: firstly, synchronously collecting three-phase voltage, current and rotating speed signals, and constructing a multi-dimensional time sequence matrix through data cleaning and sliding window segmentation; then, carrying out multi-scale decomposition on the matrix by adopting adaptive wavelet packet transformation, combining each frequency band reconstruction coefficient with an original signal channel, and constructing an enhanced feature tensor; then, a CNN-BiLSTM parallel network is constructed; and finally, dynamically fusing the features of the two branches through a self-adaptive weighted fusion strategy, and inputting a multi-layer full-connection classifier to output a fault type. According to the method, early weak fault features are effectively enhanced, bearing faults, rotor eccentricity, electrical imbalance and composite faults thereof can be accurately recognized, the intelligent level and accuracy of fault diagnosis of the generator set are remarkably improved, and the method can be widely applied to online monitoring and health management of power generation equipment of a power system.

A power closure actuator for powering a movable closure includes a shaft situated between an electric motor and an output member. A brake device along the shaft is configured for actuation via an electric brake actuator to apply braking. An active brake clamp is movable by the electric brake actuator. An axially floating rotor is rotatable with the shaft and has a first axial side facing the active brake clamp a second axial side providing a second braking surface. A passive backing brake clamp is positioned adjacent the second braking surface. The axially floating rotor is biased away from the passive backing brake clamp by a first biasing member. Deflection of the first biasing member coupled with axial movement of the active brake clamp and the axially floating rotor enables braking by pinching action of the axially floating rotor between the active brake clamp and the passive backing brake clamp.

According to the reverse type integrated miniature linear servo electric cylinder, the open end of a rotor shell in a power transmission mechanism is fixedly connected with a planet retainer through a coupler, and the planet retainer is directly driven by adopting integrated treatment of the motor rotor shell and the planet retainer; after power transmission of the planet retainer, the output end is directly driven to realize linear motion without adding a speed reducing mechanism in a power transmission system of the electric cylinder, so that the internal space, occupied by the power transmission mechanism, of the electric cylinder is greatly reduced, the electric cylinder can be developed to a smaller and more compact structure, and the cost can also be saved; and moreover, the energy utilization rate of the electric cylinder is improved, the electric energy consumption of the electric cylinder is saved, and better economic benefits can be generated.

Systems and methods for cooling an externally excited electric machine. An externally excited electric machine cooling system, in one example, includes rotor windings positioned radially outward from a rotor shaft and including a plurality of gaps between metal wire bundles. The externally excited electric machine cooling system further includes a cooling device positioned in the plurality of gaps and configured to directly cool the rotor windings.

A bearing assembly includes an outer ring connectable with a housing, the outer ring having an outer ring raceway and a transmitting coil axially spaced from the outer ring raceway. The transmitting coil can be electrically connected to a battery and is configured to generate an electromagnetic field when a current flows therethrough. The inner ring can be arranged around a rotating shaft of the rotor and is provided with an inner ring raceway and a receiving coil which is spaced from the inner ring raceway in the axial direction. And the receiving coil is close to the transmitting coil and is in induction connection with the transmitting coil, so that current is generated in the receiving coil when the current flows through the transmitting coil. The receiving coil is connected with an electromagnetic coil of the motor rotor, so that current flows to the electromagnetic coil from the receiving coil. A plurality of rolling bodies are disposed between the outer ring raceway and the inner ring raceway to rotatably connect the outer ring and the inner ring together.

An autonomous flying device achieving a large payload and a long continuous flight time and also accurately adjust position and orientation while flying. The device includes: a main rotor and the like that provide main thrust; a sub rotor and the like that controls the orientation; an engine that generates energy for rotating the main rotor and the like and the sub rotor and the like; and an arithmetic control device that controls rotation of the sub rotor and the like. Also, the main rotor and the like are rotated by being drivingly connected to the engine, whereas the sub rotor and the like are rotated by motors driven by electric power generated from generator and the like operated by the engine. Further, when orientation control to tilt the fuselage is performed, the arithmetic control device increases the output distribution ratio of the sub rotor to above the output distribution ratio of the sub rotor when hovering is performed.

The invention discloses a rotor for a rotary electric machine. The rotor comprises a rotor core; a first-layer permanent magnet disposed in the first-layer magnet hole; and a second-layer permanent magnet disposed in the second-layer magnet hole. The magnet angle of one magnet sheet is an angle formed by a reference line extending in a direction perpendicular to the d-axis from an intersection point between the d-axis and the extending direction of the side surface in the main magnetic flux direction in the one magnet sheet when viewed in the axial direction, and the extending direction of the side surface. When the side closer to the radial inner side than the reference line when viewed in the axial direction is set as the positive side of the magnet angle, the first magnet angle of a first magnet piece on the d axis or closest to the d axis of the permanent magnets forming the first layer is smaller than the second magnet angle of a second magnet piece on the d axis or closest to the d axis of the permanent magnets forming the second layer.

This invention relates to the field of vacuum pump testing technology, specifically to a rotor temperature control system and method for a Roots vacuum pump, comprising a pump body, a rotor assembly, a temperature measurement system, a heating system, a cooling system, and an electronic control system. The temperature measurement system includes a wireless temperature sensor that measures the temperature of the rotor assembly and transmits the temperature signal to the electronic control system. The heating system is located at the pump body's inlet. The inner cavity of the rotor shaft of the rotor assembly is connected to the cooling system. The cooling system is electrically connected to the electronic control system. By adding a cooling system, and connecting it to the hollow rotor shaft, more heat can be removed. Simultaneously, a heating system is provided to heat the medium entering the pump body. Both the heating and cooling systems are connected to the electronic control system, which allows for precise temperature control of the rotor assembly and the internal temperature of the Roots pump cavity.

A centrifugal separator arrangement includes: an energy converter positioned in proximity to a rotor of the centrifugal separator and configured to collect and convert the non-electrical energy generated by the rotor of the centrifugal separator into electrical energy; and a sensor configured to obtain a parameter associated with the operation of the centrifugal separator, wherein the sensor includes a processor configured to produce corresponding data, and wherein the sensor is in electrical connection with the energy converter to be powered by the electrical energy collected and converted by the energy converter. A method and a system for energy harvesting in the centrifugal separator arrangement is also provided.

The invention discloses an insulation state monitoring system and method for a rotor winding of a pumped storage unit, and relates to the technical field of insulation state monitoring. Electrical performance parameters and environmental parameters of the rotor winding are analyzed, an insulation resistance model is constructed, and the insulation resistance of the rotor winding is output through an insulation resistance model expression; according to the mode, online monitoring of the insulation state can be achieved, meanwhile, the accuracy of insulation state monitoring is effectively improved through multi-parameter coupling analysis, then the monitored insulation state corresponds to fault characteristics of the pumped storage unit, and when the pumped storage unit breaks down, the fault of the pumped storage unit can be monitored. According to the method, fault causes can be accurately positioned, the monitored insulation resistance values are fitted to obtain an insulation state change curve, the insulation deterioration trend is warned in advance, and therefore the sudden fault risk is reduced.