Class / Patent application number | Description | Number of patent applications / Date published |
310120170 | Stepping or linear pulse type | 10 |
20090152960 | MICRO ACTUATOR - Disclosed is a micro actuator capable of being formed in compact as a whole, such as 10 mm in diameter by diminishing a difference between a stroke distance of a moving member and an overall length, and by reducing a sectional area taken in a direction orthogonal to a stroke direction. The micro actuator includes: a spline shaft formed as a cylinder with a hollow part and having an axially extending slit opening; a spline nut fit-engaged with the spline shaft and axially guiding the spline shaft; a pair of end caps fixed to openings at both ends of the spline shaft; a magnet rod supported at both ends within the hollow part of the spline shaft by the end caps; and a forcer loosely fit-engaged with a periphery of the magnet rod within the hollow part of the spline shaft to constitute a linear motor together with the magnet rod and connected with the spline nut through the slit opening. | 06-18-2009 |
20090179505 | POLYGONAL ELECTRICAL MACHINE - The invention relates to a polygonal electric linear motor. In said motor, a primary part that is provided with transversal flux windings ( | 07-16-2009 |
20090195087 | LINEAR ACTUATOR - There is provided a linear actuator, which is provided with a multipolar magnet arranged with a plurality of S-poles and N-poles alternately along an axial direction thereof; and a coiled body arranged to be relatively movable in the axial direction face to face with respect to the multipolar magnet. In this configuration, the multipolar magnet comprises an integrally formed isotropic magnet material which is magnetized into S-poles and N-poles alternately along the axial direction thereof. | 08-06-2009 |
20100109448 | MAGNETIC LEVITATION SYSTEM - A magnetic levitation system includes a levitation-actuator movable element which generates a levitation force applied to a control object; and a levitation-actuator stator which receives a reactive force while the control object is being operated, the levitation-actuator stator being attached to a fixed or movable structure. The levitation-actuator stator includes levitation-actuator stator units connectable to each other in a travelling direction. Each levitation-actuator stator unit includes a coil and an iron core for generating a levitation force between the levitation-actuator stator unit and the levitation-actuator movable element. A length of an end portion of each iron core is equal to or larger than a length of each coil between the ends of the coil so that the cores are continuously arranged without gaps therebetween when the levitation-actuator stator units are connected to each other in the travelling direction. | 05-06-2010 |
20100171374 | LINEAR MOTOR - A mover includes a permanent magnet array having a plurality of permanent magnets that are magnetized in a direction perpendicular to a motion direction of the mover such that magnetic poles having different polarities alternately appear on magnetic pole surfaces of the plurality of permanent magnets in the motion direction. A stator includes first and second magnetic pole portion arrays and three excitation windings. Each of the magnetic pole portion arrays include a plurality of plate-like magnetic pole portions disposed on both sides of the permanent magnet array in the perpendicular direction. Each of the excitation windings is hollow-structured whereby two magnetic pole portions included in the first magnetic pole portion array and two magnetic pole portions included in the second magnetic pole portion array are located in an internal space of the coil and are excited by the corresponding one of the excitation windings. | 07-08-2010 |
20120098355 | MULTIPLE-PHASE LINEAR SWITCHED RELUCTANCE MOTOR - A linear switched reluctance motor comprises a movable coil bracket including first and second coil assemblies. Each of the first and second coil assemblies further comprises a plurality of coils separately wound around a plurality of motor coil cores, each of the coils being configured to receive a sinusoidal current at a different phase from other coils comprised in the same coil assembly. Tooth members of a stator track are located adjacent to the motor coil cores such that a magnetic flux path is created which passes through the motor coil core, the stator track and an air gap between the motor coil core and the stator track. A multiple-phase motor driver electrically connected to the first and second coil assemblies generates symmetric multiple-phase sinusoidal currents for driving the motor. | 04-26-2012 |
20140111033 | Inchworm Motion Llinear Motor Based On Electromagnetic Clamping Mechanism - An inchworm motion linear motor based on an electromagnetic clamping device in a technical field of electromagnetic motors includes more than two electromagnetic clamping mechanisms which are arranged in pairs and mutually symmetrically connected. The electromagnetic clamping mechanism includes magnetic field generation devices, rolling bodies, an output shaft and a shell body, wherein the magnetic field generation devices are fixedly arranged outside the shell body; and the shell body and the rolling bodies are sleeved outside the output shaft in sequence. The inchworm motion linear motor based on the electromagnetic clamping device can be manufactured into an electric control super-large clamping force device by sensitively controlling mechanical rigid locking and releasing states with electromagnetically. The clamping device can be manufactured into a driving device or the linear motor with super-large load and precise movement. | 04-24-2014 |
20140300211 | Discrete Motion System - Discrete motion systems move relative to a lattice, using bistable mechanisms to snap between lattice locations. A discrete motion system includes a lattice having a regular configuration of attachment points, one or more motion modules that move across the lattice in discrete increments, and controllers that direct the modules. A module includes a body, actuators, and feet having mechanisms for attaching and detaching the module from the lattice. The module may include actuated joints that cause movement of arm structures to engage and disengage the feet from the lattice. The module may be a digital inchworm, and may be a relative assembler having at least one assembler arm. A method for discrete extensible construction includes creating a lattice having a regular configuration of attachment points, causing a discrete motion relative assembler to systematically move across the lattice in discrete increments, and causing placement of materials by the assembler arm. | 10-09-2014 |
20160141945 | MAGNETIC JACK TYPE CONTROL ELEMENT DRIVE MECHANISM FOR PRECISION POSITION CONTROL OF CONTROL ELEMENT ASSEMBLY - A magnetic jack type control element drive mechanism for precision position control of a control element assembly, satisfies the following conditions: | 05-19-2016 |
20160164394 | Electropermanent Magnet-based Motors - An electropermanent linear actuator has a stator, forcer, drive circuitry, and feedback control mechanism. The stator includes at least one electropermanent magnet with a coil that passes current pulses that change the magnetization of the magnet, which change persists after current is removed. The forcer moves with respect to the stator in response to the persistent changes in magnetization. Drive circuitry controls the position or speed of the actuator by controlling the timing, magnitude, and/or shape of the current pulses. The voltage and duration of pulses are of sufficient magnitude to cause the magnetization change to persist after cessation of current, with voltage and current returning substantially to zero between pulses. The feedback control mechanism determines, based on actuator velocity or position, when the next current pulse should be issued, pulse issuance being timed so that the actuator will continue to move throughout the absence of applied current between pulses. | 06-09-2016 |