375 results about "Electric machine" patented technology

An electric, inductively-energized, multi-bladed, controllable-pitch propeller hub is configured with an internal battery, electronic control unit and electric internal reversible hubmotor, when energized by a voltage inducted across an air gap into an annulus of receiver coils that is mounted onto said propeller hub and when said propeller hub is attached to and operated with complementary electrical, electronic and mechanical components that enable wireless command signals, together forming a novel and versatile device whose operation can provide near-instantaneous modulation of aircraft thrust, lift and drag by the action of said propeller hub to actuate precise and equal changes to the pitch of each propeller blade through a full range of useful pitch settings, both during rotation of said propeller hub and when said propeller hub is stationary, with an innovation including a coaxial driveshaft that facilitates the removal and installation of said propeller hub from a propmotor.

A circuit configuration for an electric machine, e.g., a starter motor for starting an internal combustion engine in a motor vehicle, includes a current limiting device for limiting a starting current of the electric machine. The circuit configuration includes a bridging device for bridging the current limiting device.

The invention discloses a fuel cut sliding shift control method for a hybrid vehicle. The hybrid vehicle comprises a hybrid vehicle controller, an engine controller, a transmission controller, a motor controller and a battery controller which are mutually coupled and communicated. When the hybrid vehicle is free from faults and is in a fuel cut sliding mode, the hybrid vehicle controller receives signals from other controllers to judge whether the fuel cut sliding shift process control is carried out, determines the target revolving speed of the engine and the motor, calculates a practical requirement torque of the motor on the basis of the difference value of the current revolving speed and the target revolving speed of the motor, calculates the practical output torque of the motor on the basis of a motor torque limitation value and the practical requirement torque of the motor, sends the practical output torque of the motor to the motor controller and judges whether the fuel cut sliding shift process control is kept. The method has the characteristics that the motor revolving speed is controlled to successively regulate the current revolving speed of the engine in the shift process, and therefore, a lock-up clutch can be quickly locked up again after shift is finished.

The invention discloses an electric static liquid actuator for deep sea. An integrated-type integrated structure is adopted. The movement of a hydraulic cylinder is controlled by a two-way hydraulic pump. The forward and reverse of a motor is adjusted and controlled, and the displacement and accelerated speed of a piston rod of the hydraulic cylinder are controlled through speed regulation operation; and a hydraulic direction-changing valve, a reducing valve and other control valves are cancelled, and an arranged sensor monitors and adjusts the working condition of a system. A pressure compensator is arranged outside the system and used for compensating system pressure and adapting high pressure environment of the deep sea. A hydraulic circuit adopts a plate-type connection without external connection pipelines, only an interface for power supply and signal transmission is arranged on the exterior of the hydraulic circuit, the advantages of a hydraulic actuating system and an electricactuating system are both had, system composition is simplified greatly, and the equipment volume is greatly reduced. Therefore, the electric static liquid actuator for the deep sea has a wide application prospect in deep-sea operating equipment and shipping equipment.

A continuously variable transmission (1) for transmitting a driving force of an engine (VE) to a load (DW) to be driven, in particular in a vehicular drive line, provided with two hydraulic pumps (10, 11) for realising a pressurised supply of hydraulic transmission fluid for the actuation of the transmission (1), whereof a first pump (10) is driven by the engine (VE) and whereof a second pump (11) is driven by an electric motor independently from the engine (VE), and with a main hydraulic line (13), an auxiliary hydraulic line (15) and a line pressure valve (14) that control a pressure (Pline) in the main line (13) by allowing a surplus of transmission fluid to flow from the main line (13) into the auxiliary line (15), wherein the first pump (10) is connected to the main line (13) and wherein the second pump (11) is connected to the auxiliary line (15).

The invention provides a photoetching machine worktable with a driving device capable of balancing torque, comprising a coarse motion part and an inching part. The coarse motion part comprises an X-direction part and a Y-direction part which is arranged at the bottom of the X-direction part, the X-direction coarse motion part is provided with an X-direction driving motor and an X-direction comprehension motor, and the Y-direction coarse motion part is provided with a Y-direction driving motor. The photoetching machine worktable with the driving device capable of balancing the torque, which is proposed by the invention, adopts a motor as a main driving motor of the worktable and another motor to be in parallel with the former motor so as to eliminate additional torque, i.e. the two motors are combined to eliminate the additional torque which is generated by the driving force and the centroid mismatching of the motors.

The invention relates to a control system and a control method for the rotating speed of a motor spindle of a numerical control system. The control system comprises an embedded Linux numerical control system master station and a numerical control system slave station which are in communication connection through an Ethernet control automation technology (EtherCAT) communication protocol bus, wherein the embedded Linux numerical control system master station periodically sends a speed command value to a servo device of the numerical control system slave station through a soft circuit layer to control the motor to rotate according to the speed command value; and the servo device of the numerical control system slave station periodically feeds a speed feedback value back to the embedded Linux numerical control system master station, so that a full closed loop control system is formed. A closed loop control method is adopted, the system and the method are basically free from interference, high in stability and transmission speed and low in failure rate, the circulation time of full closed loop control reaches 1mu s, control accuracy can reach 1nm, the rotating speed of the motor spindle reaches 16,000rpm, and stability and reliability are ensured.

The invention discloses a method for controlling a non-radial displacement transducer of a multi-phase and single-winding bearingless motor. The control for torque and suspension of the multi-phase and single-winding bearingless motor is finished in two planes which are orthorhombic mutually; and a multi-phase inverter is utilized to simultaneously introduce two groups of currents with different phase differences to the motor, thus respectively realizing the torque drive and the rotor suspension of the motor. With respect to the multi-phase and single-winding bearingless motor with the phase number of more than or equal to 7, displacement signals are extracted from another plane different from a torque plane and a suspension plane according to the the characteristics of MDOF (multiple degree of freedom) of the multi-phase motor by utilizing the relationship between mutual inductance and eccentricity among different planes in an eccentric state, so as to research the non-displacement transducer control technology of the motors. In the method, the multi-control DOF of the multi-phase and single-winding bearingless motor is utilized to extract radial displacement information of a rotor under fundamental frequency, thus reducing the system cost, shortening the radial length of a system and improving the system reliability.

The invention relates to a direct-drive composite permanent magnet motor with a magnetic transmission and dual-stator structure. According to the direct-drive composite permanent magnet motor with the magnetic transmission and dual-stator structure, a novel permanent magnet motor with a dual-stator hollow-rotor structure and a magnetic gear transmission technology are integrated so as to directly realize the mutual conversion of electric energy and low-revolving-speed large-torque mechanical energy, and the novel direct-drive composite permanent magnet motor can be widely applied to the wind power generation, hydraulic power generation, electric automobiles, ship drive and the field of transmission of other industries needing direct drive. The direct-drive composite permanent magnet motor is characterized in that an integrated structure is formed in a manner that a disk-shaped magnetic transmission gear pair I and a dual-stator-structure permanent magnet motor II are combined, the variable-speed transmission of high-speed and low-speed mechanical kinetic energies is realized by using the magnetic transmission gear pair I with transverse magnetic fields, the electromechanical energy conversion is realized by using the dual-stator-structure permanent magnet motor II with radial magnetic fields, a magnetic circuit structure is of a closed magnetic circuit which is formed in a manner that an inner stator and an outer stator are directly connected between two hetero-polarity permanent-magnet poles of a hollow rotor in series, the inner stator, the outer stator and the rotor are of a radial concentric structure, and two air gaps exist.

An electric vehicle three-system integrated test platform belongs to the field of electric vehicles. The electric vehicle three-system integrated test platform is composed of a battery and battery management system, a motor and motor control system, and an industrial personal computer. The battery and battery management system comprises a battery cooling/heating system, a battery management system, and a battery pack. The motor and motor control system comprises a current sensor, a voltage sensor, a motor, a speed/torque sensor, an inertia disc, a dynamometer, a motor controller, and a tension controller. The battery cooling/heating system makes the batteries work within an optimal temperature range. Through the battery management system, the voltage and current of the battery can be monitored, and functions like battery equalization can be achieved. Through the motor and motor control system, the performance and properties of the motor under various conditions can be tested and analyzed. A finished vehicle control system simulates different driving conditions of an electric vehicle so as to test and optimize the regenerative braking control effect.

A vehicle including a movable element and an electric machine either driving or being driven by the movable element. The electric machine having first and second housing portions and a stator. The second housing portion is engaged with the first housing portion. The stator being coupled to the first housing portion and the second housing portion by way of compressive force applied to the stator by and between the first housing portion and the second housing portion.