10735 results about "Linear motor" patented technology

An apparatus and method for controlling driving of a linear motor, which is configured to increase efficiency of a linear compressor and stably drive the linear motor when the linear motor is overloaded. The apparatus includes a detector that detects a current applied to a motor, a controller that outputs a control signal based on the detected current and a switch that varies the number of windings of the linear motor coil on the basis of the control signal.

An oilfield pump employing a linear electric motor. The linear electric motor replaces a conventional crankshaft or hydraulic techniques for driving a plunger of the pump. This may reduce the number of equipment parts and amount of maintenance expenses associated with the operation of oilfield pumps. Furthermore, the use of a linear electric motor may also increase the precision and control over the fluid delivery provided by the pump assembly.

A linear light system, and a linear luminaire used in the system, for lighting a traffic surface. The linear luminaire has a plurality of light emitting diodes (LEDs) disposed in a linear matrix along the length of the traffic surface, and a plurality of refractive lenses for directing the emitted light from the LEDs at the traffic surface. The traffic surface is typically the roadway of a tunnel. A refractor lens is used to direct the emitted light from the LEDs predominantly toward at least the traffic surface.

A door actuator system includes a linear motor, electromagnetically coupled between a moveable door and an adjacent non-moving structure, and a controller, interconnected to the linear motor, configured to power the linear motor to cause motion of the door, and to detect motion of the door from induced current produced in the linear motor.

An apparatus and method for mixing fluids and/or solids in a manner that can be varied from maintaining the integrity of fragile molecular and biological materials in the mixing vessel to homogenizing heavy aggregate material by supplying large amounts of energy. Variation in the manner of mixing is accomplished using an electronic controller to generate signals to control the frequency and amplitude of the motor(s), which drive an unbalanced shaft assembly to produce a linear vibratory motion. The motor may be a stepper motors a linear motor or a DC continuous motor. By placing a sensor on the mixing vessel platform to provide feedback control of the mixing motor, the characteristics of agitation in the fluid or solid can be adjusted to optimize the degree of mixing and produce a high quality mixant.

A system and device for providing a beneficial effect to the oral cavity of a mammal, the system including means for directing a fluid effective to provide the beneficial effect onto a plurality of surfaces of the oral cavity; and the hand-held device, the hand-held device being suitable for providing the fluid to the directing means, and including means for providing reciprocation of the fluid, means for controlling the reciprocation of the fluids, means for conveying the fluid through the device system, a reservoir for containing the fluid, a power source and a linear motor.

An ultrasonic probe assembly comprises a housing defining a longitudinal axis and having a linear motor assembly, a swivel base, and an extension arm disposed therewithin. An imaging transducer is mounted on a free end of the extension arm and is specifically adapted to be moved along an arcuate path as a result of mechanical interconnection of the swivel base to the linear motor assembly. The swivel base upon which the extension arm is mounted is configured to be pivotable about a pivot axis oriented transversely relative to the longitudinal axis such that reciprocative motion of the linear motor assembly is converted in swiveling motion of the swivel base and oscillating translation of the transducer along an arcuate path such that the transducer axis is oriented generally perpendicularly relative to an anatomical structure having a convexly shaped outer surface.

A driving apparatus of a linear motor which reciprocally drives a movable element supported by an elastic member, includes an inverter that converts a direct current power into an alternating-current power with a specified frequency to drive the linear motor, a current detector that detects the output current of the inverter, a voltage detector that detects the output voltage of the inverter, an amplitude detector that detects an amplitude of the movable element of the linear motor, an amplitude controller adjusts the output current or output voltage in a first control cycle so that the amplitude of the movable element is a desired constant value, and a resonant controller that adjusts the output frequency of the inverter in a second control cycle which is larger than the first control cycle so that the output current of the inverter is substantially minimum on condition that the amplitude is substantially constant.

The present invention relates to picking robot technology, and is especially one kind of linear motor driven terminal executor of picking robot. The linear motor driven terminal executor consists of fingers, link rod and crank, gears, linear motor, air bag, push plate, casing, vacuum generator, sucking disc, fixing clip and other parts. The mover of the linear motor moves linearly to drive the sucking disc back and forth for sucking the fruit, to make the fingers open or close to hold the fruit via the transmission of the gears, crack and the four-rod mechanism, and to drive the push plate forwards for compressing the air bag to blow out leaves and facilitating picking. The present invention needs only one motor, and has compact structure, high precision and smooth and reliable motion.

A sensor mounting system for enabling image stabilization in a digital camera is described. An electronic array light sensor is moved in relation to other parts of the camera in response to camera motion. In one embodiment, the sensor is moved by at least one linear motor having a ferrofluid in a gap of the linear motor. Other aspects of the system are described, including methods of heat sinking the sensor, a suspension system, methods of compensating for an effect of temperature on the ferrofluid, and a compact magnet configuration for forming the linear motor and providing feedback as to the position of the sensor.

The invention discloses a plunger pump driven by a linear motor. The plunger pump is driven by the linear motor, and a motion rule of an assembly is controlled by controlling a motion rule of the linear motor, so that the disadvantages of an existing plunger pump are overcome, and the advantage of the plunger pump is exerted to the maximum extent.

The invention discloses a medical appliance carrying apparatus which comprises a working table. A vertical slide rail is arranged on one side of the upper surface of the working table; an electric trolley is arranged on the vertical slide rail and provided with a mount on the upper surface; a circular groove is formed in the center of the upper surface of the mount; a rotating motor with an upward rotating end is arranged in the circular groove; the rotating end of the rotating motor is provided with a circular supporting plate matched with the circular groove; a first installation box is arranged on the upper surface of the circular supporting plate; a controller is arranged on the front surface of the working table; a mains supply interface is arranged on the back surface of the working table; a power terminal of the controller is connected with a mains supply interface via a conductor wire; an output end of the controller is connected with the electric trolley, the rotating motor, a hydraulic cylinder, an electric pusher and a micro linear motor via conductor wires respectively. The medical appliance carrying apparatus has the advantages of high carrying capacity, high carrying speed, capability of liberating manpower and improving work efficiency, small size, and high movability.

A motion platform device includes a moving platform which is coupled to a base platform by three pedestals and three linkages. Three actuators are disposed on the base platform and are synchronously movable relative to the base platform along three linear sliding paths, and are connected respectively to the pedestals. The linkages are linked with the moving platform and are respectively coupled to the pedestals so as to transmit movement of the actuators to turn the moving platform. The linkages are controlled by a simulated movement controller to be moved relative to the pedestals along the respective lengths so as to perform flight motion simulation, particularly in spatial disorientation training. This three-leg six DOF linear motor based parallel manipulator has been proved to be excellent in simulation performance, especially in the working space.

The present invention relates to an electrically operable resuscitation device comprising a pump including a rigid cylinder including at least one gas inlet and at least one gas outlet, a piston to travel in said cylinder, and at least one valve, the or each valve configured to allow gas to be displaced into said cylinder through said at least one gas inlet during at least one of a first stroke direction and second stroke direction of said piston in said cylinder, and for allowing gas to displaced through said at least one gas outlet during an opposite of said at least one of the first stroke direction and second stroke direction of said piston in said cylinder; a motor, selected from one of a stepper motor and feedback motor and stepper motor with feedback and linear motor, operatively connected to said piston to move said piston in said cylinder; a patient interface in ducted fluid connection with said pump to receive gas via said at least one gas outlet and to deliver said gas to said patient.

A reciprocating compressor driven by a linear motor, comprising a shell, within which are mounted: a reference assembly formed by a motor and a cylinder (1); a resonant assembly formed by a piston (2) reciprocating inside the cylinder (1), and by an actuating means (3) operatively coupling the piston (2) to the motor; two spring means (10) mounted to the resonant assembly and to the reference assembly and which are elastically and axially deformed in the displacement direction of the piston (2); a mounting element (40) coupling an end of one spring means (10) to an end of the other spring means (10); and a coupling element (50) mounted to the piston (2) and to the mounting element (40), which is axially displaced together with the piston (2) and displaced freely and transversally to the displacement direction of the piston (2), said coupling element (50) transmitting the axial forces between the piston (2) and the mounting element (40) and minimizing the application of radial forces to the piston (2).

A system for adjusting resonant frequencies in a linear compressor comprising, in the interior of a shell: a linear motor: a cylinder; a piston reciprocating inside the cylinder; and an actuating means operatively coupling the piston to the linear motor, said system comprising: a detecting means to detect a load imposed to the linear motor, in an operational condition of the latter related to the gas pressure in the discharge thereof; and a frequency adjusting means operatively associated with the detecting means and with the resonant assembly, in order to define, as a function of said operational condition, a frequency adjustment, by varying at least one of the values related to the mass of the resonant assembly and to the average stroke of the piston, to a value of the mechanical resonance frequency corresponding to the electrical supply frequency.

A track and carriage system that includes a pair of spaced apart parallel rails and a carriage rollingly mounted on the rails. The carriage is a rectangular, in plan view, structural unit having a pair of opposite parallel marginal edges with a frame side rail secured to each of the marginal edges. Rollers journalled on the side rails rollingly support the carriage on the rails. A motor mounting subassembly carried by the carriage provides a downwardly facing channel that receives therein a portion of one of the rails. A plurality of rollers on the motor mounting subassembly maintains a minium air gap between a linear motor mounted on the subassembly and a magnetic strip on an adjacently disposed side face of one of the rails. The carriage structural portion maybe a plurality of beams disposed side-by-side or one or more extruded monolithic cast structures. A structural plate like member maybe mounted on the load carrying frame. If desired a power driven roller conveyor maybe mounted on the carriage for loading and off loading goods. Also the motor mounting subassembly and a frame side rail secured thereto running on a single rail provides a mono rail transfer vehicle.

The invention discloses a closed loop planar linear motor which includes a stationary stator (or platen) of arbitrary extent, and a moving forcer which is a single rigid body that can move over the planar stator surface on an air bearing with high speed and high precision in two orthogonal translational directions and a small rotation (or combinations thereof). An important distinguishing feature is a monolithic position and orientation sensor based on alternating current (AC) magnetic techniques which is an integral part of the forcer and occupies otherwise unused space in the forcer body. Also incorporated within the forcer is a special electronic processing element which converts weak AC signals from the sensor into usable high precision position and orientation information relative to the stator surface. A unique controller which is part of the closed-loop linear motor acts to combine information from the AC magnetic sensor with input from a user to provide precise, high-performance closed-loop control of the forcer, thereby enabling the forcer to be positioned with sub-micrometer precision and oriented with sub-millidegree precision on the stator surface. Additionally, owing to its closed-loop nature, the forcer can maintain its position and orientation even in the presence of disturbance forces and torques, and can emulate the operation of a mechanical spring and damper.

A wind power generation system 10 comprising a frame, an impeller 12 rotatably supported by the frame, plural permanent magnets 31 aligned at equal intervals from the rotation center, and coils 32 aligned annularly on the frame. The relative motion of the permanent magnets 31 and the coils 32 in close vicinity generates electric powers by the inverse action of a linear motor. The coils 32 are mounted on the ring provided on the frame, and the permanent magnets 31 are provided on the lower end of the longitudinal blades 26 of the impeller.