Patent application number | Description | Published |
20080211354 | Bearingless Step Motor - There is provided a bearingless step motor in which a rotating shaft can rotate while rising from a main body by a magnetic force without using a mechanical bearing. The bearingless step motor comprises a stator including stator cores having winding portions and a rotor including a rotating shaft and rotor cores. The rotor rotates by a magnetic interaction between the rotor cores and the stator cores. A first permanent magnet is mounted to the rotor and a second permanent magnet is mounted to the stator. The first permanent magnet and the second permanent magnet are arranged so that a repulsive force is generated between magnetic poles. There is little power consumption for raising the rotating shaft and a complicated system for controlling the rise of the rotating shaft is unnecessary. Thus, the motor can be manufactured with a light and compact structure. | 09-04-2008 |
20090108711 | HYBRID STEPPING MOTOR HAVING HIGH TORQUE DENSITY - There is provided a hybrid stepping motor comprising the following: a first rotor yoke and a second rotor yoke, each of the rotor yokes having a plurality of rotor teeth on a periphery thereof; a rotating shaft located between the first and second rotor yokes and supporting the first and second rotor yokes on a same axis, the rotating shaft including at least one permanent magnet magnetized in a direction of the axis; and a plurality of stator yokes, each of the stator yokes having a core portion, a coil wound around the core portion, and a plurality of stator teeth extending parallel to the axis from opposed end portions of the core portion, the stator yokes being disposed at regular intervals around the rotating shaft so that a constant air gap is maintained between radially inward surfaces of the stator teeth and radial end surfaces of the rotor teeth. A positive current is applied to the opposed and paired coils of said coils and a negative current is applied to the rest coils of said coils. The positive current and the negative current are applied at the same time and magnitude. | 04-30-2009 |
20090302786 | LINEAR STEPPING MOTOR - A linear motor includes a stator having teeth symmetrically formed on upper and lower surfaces thereof at regular pitch; a movable member including upper cores disposed above the stator, lower cores disposed below the stator in symmetrical with the upper cores, and yoke parts connecting the upper and the lower cores around the stator, wherein the upper and lower cores have upper and lower coils wound therearound, respectively; at least one gap sensor to detect the gap between the stator and the upper or lower core and the inclination of the movable member; a controller performing the levitation control by adjusting the amplitudes of currents applied to the upper and lower coils, based on the gap variation, and driving the linear motion by changing the current phases; and a multichannel voltage-to-current power amplifier of which each channel is connected to each coil of the upper and lower cores. | 12-10-2009 |
20100192719 | DEVICE FOR GENERATING STIFFNESS AND JOINT OF ROBOT MANIPULATOR COMPRISING THE SAME - The present invention provides a device for generating and varying stiffness, which may be applied to a joint of a robot manipulator. The stiffness generating device of the present invention, comprises: a rotating shaft connected to a driven member; a rotor fixed to the rotating shaft and having arms comprising a magnetic element; a stator disposed to surround the rotor outside the arms and being connected to a drive motor; electromagnets fixed to an inner periphery of the stator and being opposed to each other about the rotating shaft, each having a core and a coil wound around the core; and means for applying current to the coils. One half of the electromagnets has N-poles at their inward ends and the other half of the electromagnets has S-poles at their inward ends. Current regulating means regulates the current being applied to the coils. | 08-05-2010 |
20100247010 | AIRFOIL-MAGNETIC HYBRID BEARING AND A CONTROL SYSTEM THEREOF - The present invention relates to an airfoil-magnetic hybrid bearing, which is a combination of a magnetic bearing and airfoil bearing. An airfoil-magnetic hybrid bearing of the present invention comprises: a housing around a rotating shaft of a rotation device; an airfoil bearing positioned between the housing and the rotating shaft for forming dynamic pressure to levitate the rotating shaft during rotation of the rotating shaft; a magnetic bearing including a plurality of cores positioned radially between inner surface of the housing and outer surface of the airfoil bearing, the cores being projected to the center of the rotating shaft, and coils wound to the cores to levitate the rotating shaft using a magnetic attractive force generated by a current application thereto; and a coupling segment for coupling the airfoil bearing to the magnetic bearing directly. | 09-30-2010 |
20100271540 | EYEBALL DEVICE FOR USE IN ROBOTS - Various embodiments of an eyeball device for use in robots are provided. In one embodiment, the eyeball device has an eyeball, a main part having a camera, a frame having first and second sections, first and second actuators, a first connecting member and a second connecting member. The first section is horizontally pivotally coupled to the main part relative to the main part, while the second section vertically pivotally supports the eyeball. The first and second actuators produce rotary motions. The first connecting member is coupled to the first section and the first actuator to connecting the rotary motion of the first actuator to the first section. The second connecting member is coupled to the eyeball and the second actuator to transmit the rotary motion of the second actuator to the eyeball. The eyeball horizontally pivots through the first connecting member and vertically pivots through the second connecting member. | 10-28-2010 |
20100286828 | LIP MOVING DEVICE FOR USE IN ROBOTS - Various embodiments of a lip moving device for use in robots are provided. A lip moving device has first and second lip members. The first and second lip members are made from a flexible material. First and second driving parts apply torques to both ends of the first lip member, while third and fourth driving parts apply torques to both ends of the second lip member. The first and third driving parts are mounted in a first frame. The second and fourth driving parts are mounted in a second frame. The first and second frames are pivotally coupled to a supporting part. An adjusting part pivots the first and second frames relative to the supporting part to adjust a distance between the first and second frames. | 11-11-2010 |
20130061709 | MANIPULATOR WITH WEIGHT COMPENSATION MECHANISM AND FACE ROBOT USING THE SAME - This disclosure relates to a face robot which is operated similarly to the motion of a human head and a multi-joint manipulator which supports a robot's face, and more particularly, to a structure which may compensate an influence caused by the gravity and exerted on rotation parts rotating about its axes. A manipulator with a weight compensation mechanism of the disclosure is provided, the manipulator having rotation parts connected to a plurality of axes rotating about their axes, the manipulator including: a weight compensation mechanism that supports wires connected to the rotation parts receiving gravity in a rotation state by a spring and compensates an influence of gravity exerted on the rotation parts. | 03-14-2013 |
20140024981 | WEARABLE VIBRATORY STIMULATION DEVICE AND OPERATIONAL PROTOCOL THEREOF - The wearable vibratory stimulation device includes: a measuring instrument for obtaining data relating to a body motion of a user who wears the vibratory stimulation device; a walking pattern database for storing normal walking pattern data collected by measuring general persons having normal walking patterns and information about an inherent walking pattern analysis result of a specific user; a controller for analyzing the body motion information of the user, transmitted from the measuring instrument, by comparing with the walking pattern data stored in the walking pattern database, and generating a stimulation signal to be applied to a specific body portion of the user; and an exciting unit for applying a vibratory stimulation to the specific body portion in response to the stimulation signal transmitted from the controller. | 01-23-2014 |
20140039387 | GUIDE TUBE FOR MICROSURGICAL INSTRUMENTS - A guide tube for microsurgical instruments has a linear tube having a hollow formed in the length direction thereof, a curved tube mounted to the front end of the linear tube and having unit bodies connected to allow bending, an elastic body for giving an elastic force so that a gap between the unit bodies increases, and a tension control unit mounted to the rear end of the linear tube to bend the curved tube by controlling tensions of a plurality of wires extending from the curved tube, wherein the tension control unit controls the tensions of the wires in a state where the curved tube is curved so that the rigidity of the curved tube increases to support a surgical instrument located in the linear tube and the curved tube. | 02-06-2014 |
20140276266 | GAIT REHABILITATION APPARATUS HAVING LATERAL ENTRY MECHANISM AND LATERAL ENTRY METHOD USING THE SAME - Disclosed herein is a gait rehabilitation apparatus including a first frame having a bottom surface which is movable at predetermined speed; a second frame extending upwards from a tip of the first frame; a load support unit which is mounted to an upper end of the second frame and is rotatable about a rotation axis thereof; a connection string, one end of which is connected to the load support unit, and the other end of which is connected to an upper body of a rehabilitant; a safety bar which is connected to the second frame and is rotatable so as to be tilted upwards; and a gait assistance link member which has a structure able to be tilted upwards, and is connected to each leg of the rehabilitant entering onto the first frame to assist rehabilitation training of the rehabilitant through mechanical movement of the gait assistance link member. | 09-18-2014 |
20140333143 | ELECTROMAGNETIC COIL SYSTEM FOR DRIVING CONTROL OF MICRO-ROBOT - An electromagnetic coil system for driving control of a micro-robot includes pairs of X-axis and Y-axis Helmholtz coils whose winding central axes are placed on an X axis and Y axis respectively, a position recognition system that detects a position and direction of the micro-robot in a workspace, a controller that controls an amount of supply of electric currents flowing to the X-axis or Y-axis Helmholtz coils in order to control movement of the micro-robot based on information about the movement of the micro-robot and previously input information about a path of the micro-robot, and a current amplifier that supplies the electric currents to the respective Helmholtz coils. The pairs of X-axis and Y-axis Helmholtz coils are disposed so as to face each other, and the X-axis Helmholtz coils and the Y-axis Helmholtz coils are vertically crossed and installed so as to form the workspace of the micro-robot. | 11-13-2014 |
20140343465 | GAIT REHABILITATION ROBOT HAVING PASSIVE MECHANISM FOR SHIFTING CENTER OF GRAVITY - The gait rehabilitation robot having a passive mechanism includes: a first auxiliary link member connected to a portion between the pelvis and the knee of a rehabilitating person; a joint coupled to a lower end of the first auxiliary link member; a second auxiliary link member coupled to the lower end of the joint and connected to a portion between the pelvis and the knee of the rehabilitating person; a first spring coupled to an upper end of the first auxiliary link member to prevent introversion and extroversion of a hip point from occurring when the rehabilitating person is walking; a foot support which comes into contact with the foot of the rehabilitating person; an ankle joint for connecting the foot support and the second auxiliary link member; and a second spring coupled to a side of the foot support to compensate an entropion angle. | 11-20-2014 |