Patent application number | Description | Published |
20080238592 | TWO-AXIS DRIVING ELECTROMAGNETIC MICRO-ACTUATOR - Provided is a two-axis driving electromagnetic actuator that includes a stage that is operative to be actuated about a first axis; an inner frame that that is disposed outside the stage and supports the stage by the first axis; an external frame that is disposed outside the inner frame and supports the inner frame by a second axis which is perpendicular to the first axis; a magnet that provides an electric field between the first axis and the second axis; a first driving coil that is formed on the inner frame and to which a first signal that actuates the stage in a direction of the second axis is applied; and a second driving coil that is formed on the inner frame and to which a second signal that actuates the stage and the inner frame in a direction of the first axis is applied, wherein the first driving coil and the second driving coil are electrically separated from each other. | 10-02-2008 |
20090080049 | 2-AXIS DRIVING ELECTROMAGNETIC SCANNER - A 2-axis driving electromagnetic scanner, having a structure in which a mirror is separated from a driving unit and directly driven, is provided. The electromagnetic scanner includes: an outer driving unit which is capable of rotating around a first axis; an inner driving unit which is suspended from the outer driving unit so as to rotate around a second axis perpendicular to the first axis; and a stage which is located on an upper surface of the inner driving unit so as to rotate together with the inner driving unit. In the electromagnetic scanner, the stage is connected to the inner driving unit by a link unit protruding from a center of a lower surface of the stage. | 03-26-2009 |
20100033056 | ULTRASONIC MOTOR HAVING LIGHTWEIGHT VIBRATING ELEMENT - An ultrasonic motor includes a vibrating element having a piezoelectric body attached thereto to produce a traveling wave when the piezoelectric body is supplied with an electric power, and a contacting element to come in friction contact with the vibrating element when the vibrating element is vibrated by the traveling wave. The vibrating element is formed of a Mg-based alloy having a Mg content of more than 85% by weight. | 02-11-2010 |
20100072861 | VIBRATING ELEMENT, FABRICATION METHOD THEREOF, AND ULTRASONIC MOTOR HAVING THE SAME - A vibrating element of an ultrasonic motor includes a vibrating member, and a piezoelectric body to produce a traveling wave thus to vibrate the vibrating member when electric power is applied to the piezoelectric body. The piezoelectric body includes a first piezoelectric layer attached to the vibrating member and in which positive poles and negative poles are alternately polarized, a second piezoelectric layer attached to the first piezoelectric layer and in which positive poles and negative poles are alternately polarized, a plurality of electrodes formed on opposite surfaces of the first and second piezoelectric layers, and an electrode connecting part formed on outer circumferential surfaces of the first and second piezoelectric layers to selectively connect the plurality of electrodes to one other. | 03-25-2010 |
20100084946 | ULTRASONIC MOTOR AND CONVEYING APPARATUS HAVING THE SAME - An ultrasonic motor includes a fixed member including a surface, a movable member positioned to face the surface of the fixed member, and an actuator to cause at least a portion of the movable member to contact the surface of the fixed member and cause the movable member to move relative to the fixed member. | 04-08-2010 |
20100194242 | PIEZOELECTRIC ULTRASONIC MOTOR AND METHOD OF MANUFACTURING THE SAME - A piezoelectric ultrasonic motor and a method of manufacturing the piezoelectric ultrasonic motor. The piezoelectric ultrasonic motor includes: a piezoelectric body that generates a traveling wave according to an applied voltage signal; a vibrator that is attached to the piezoelectric body and vibrates; and a rotator that contacts the vibrator and is rotated by friction with the vibrating vibrator, wherein the rotator includes a plate spring member having a contact portion that contacts the vibrator, a support member that is coupled to the plate spring member and supports the plate spring member, and a buffer space defined by the plate spring member and the support member. | 08-05-2010 |
20100304517 | MEMS DEVICE AND FABRICATION METHOD OF THE SAME - A microelectromechanical systems (MEMS) device includes a frame, an actuator formed on the same layer as the frame and connected to the frame to be capable of performing a relative motion with respect to the frame, and at least one stopper restricting a displacement of the actuator in a direction along the height of the actuator. The MEMS device is fabricated by bonding a second substrate to a first substrate, forming the frame and the actuator by partially removing the first substrate, and forming the at least one stopper by partially removing the second substrate. | 12-02-2010 |
20110168224 | THERMOELECTRIC DEVICE AND THERMOELECTRIC DEVICE ARRAY - Disclosed is a thermoelectric device. The thermoelectric device may include a thermoelectric object disposed as a horizontal structure between a high-temperature region and a low-temperature region. Also, disclosed is a thermoelectric device array where a plurality of thermoelectric objects are disposed between the high-temperature region and the low-temperature region. | 07-14-2011 |
20110185755 | Cooling apparatus and frost detecting method thereof - A cooling apparatus including a frost sensor to sense frost, a multiplexer having a first input terminal, to which the frost sensor is connected, and a second input terminal as a non-connected input terminal, a signal processor to subtract a signal input through the second input terminal from a signal input through the first input terminal, and to output a signal obtained by the subtraction, and a controller to detect an amount of frost sensed by the frost sensor, based on the output signal from the signal processor. It is possible to easily and accurately determine noise contained in a signal received from the frost sensor by determining, as noise, the signal received from the input terminal, to which the frost sensor is not connected, and subtracting the noise from the signal received from each input terminal, to which the frost sensor is connected. | 08-04-2011 |
20120064265 | Double Window/Door System for Blocking Infrared Light - There is provided a double window/door system for blocking infrared rays which includes a first glass member, a second glass member, and a spacer positioned between the first glass member and the second glass member for maintaining the space between the first glass member and the second glass member, characterized in that one of the surfaces of the first glass member is coated with a nano substance film for blocking near infrared rays and one of the surfaces of the second glass member is coated with a thermochromic substance film. | 03-15-2012 |
20120111387 | THERMOELECTRIC DEVICE AND METHOD OF MANUFACTURING THE SAME - A thermoelectric device and a method for manufacturing the same are provided. The thermoelectric device includes a middle substrate, electrodes, N-type thermopiles, and P-type thermopiles, in which the N-type thermopile and the P-type thermopile are electrically connected to each other by the electrodes in series. The thermoelectric device includes further includes an upper substrate bonded to an upper surface of the middle substrate and a lower substrate bonded to a lower surface of the substrate, such that a temperature difference is provided between opposite sides of each of the N-type thermopiles and the P-type thermopiles. | 05-10-2012 |
20120143174 | SURGICAL INSTRUMENT - A surgical instrument utilized in a minimally invasive surgery is provided. The surgical instrument includes an end effecter configured to conduct a surgical operation, a piezoelectric driver configured to generate motive power, a power transmitting unit configured to transmit the motive power generated by the piezoelectric driver to the end effecter to operate the end effecter, and a housing which encloses the power transmitting unit and the at least one piezoelectric driver. | 06-07-2012 |
20120299429 | ROTOR AND MOTOR - A rotor and a motor are provided in which the q-axis inductance is increased and the leakage of magnetic flux is prevented to ensure high power operation at high level driving speeds. The rotor includes a rotor core, which is formed at the center thereof with a hole coupled to a shaft, and a module configured to be coupled to the rotor core and comprises a pair of first permanent magnets, which are space apart from each other, and a first connection part connecting ends of the first permanent magnets to each other. | 11-29-2012 |
20130038266 | APPARATUS AND METHOD FOR CONTROLLING ACTUATOR - Provided is an actuator control apparatus including: an observer configured to estimate a state of a load based on a state equation including at least one modeled load parameter; a controller which outputs a signal for controlling the load; a compensation unit which compensates for the signal output from the controller; and an estimator configured to estimate a change of a load parameter, to decide a gain of the compensation unit based on the estimated change of the load parameter, and to update the modeled load parameter. | 02-14-2013 |
20130088112 | MOTOR AND ROTOR OF A MOTOR - A motor includes a first rotor and a second rotor which are disposed at opposite sides of a stator, and each of the first rotor and the second rotor includes a plurality of modules, each including a pair of permanent magnets and a connection unit which connects ends of the permanent magnets. | 04-11-2013 |
20140042796 | IN-WHEEL ACTUATOR AND IN-WHEEL ASSEMBLY COMPRISING THE SAME - An in-wheel assembly includes an in-wheel actuator and a wheel. The in-wheel actuator includes a driving motor, a decelerator which is disposed in the driving motor and configured to decrease a rotational speed received from the driving motor, and an output shaft which is configured to receive the rotational speed decreased by the decelerator. The wheel is configured to accommodate the in-wheel actuator in an inner space and is driven by the rotational speed of the output shaft to rotate. | 02-13-2014 |
20140049094 | IN-WHEEL ACTUATOR AND IN-WHEEL ASSEMBLY COMPRISING THE SAME - An in-wheel assembly includes an in-wheel actuator and a wheel. The in-wheel actuator includes a driving motor; a hollow shaft which is disposed inside of the driving motor and driven by a rotational speed of the driving motor to rotate; a decelerator which is arranged in an inner space of the hollow shaft and configured to reduce a rotational speed of the hollow shaft and output the reduced rotational speed to an output shaft; and a shaft support which is configured to support the hollow shaft to rotate with respect to the driving motor and the decelerator. The wheel accommodates the in-wheel actuator and is driven by a rotational speed decreased by the decelerator to rotate. | 02-20-2014 |
20140054998 | ROTOR AND ELECTRIC MOTOR INCLUDING THE SAME - A rotor and an electric motor including the rotor are provided. The electric motor includes a rotor and a plurality of stators. The rotor includes a plurality of main magnets that are disposed spaced apart from each other along a circumferential direction with respect to a rotation axis of the rotor, and have a magnetizing direction that is a direction of the rotation axis, a plurality of auxiliary magnetic units that are disposed on both sides of each of the main magnets in the direction of the rotation axis, and have a magnetizing direction that is the circumferential direction, so as to concentrate magnetic flux in each of the main magnets, and a plurality of webs that are disposed between the auxiliary magnetic units so as to generate a reluctance torque. | 02-27-2014 |
20140375162 | ROTOR OF ELECTRIC MOTOR AND MOTOR USING THE SAME - Exemplary embodiments disclose a rotor of an electric motor and an electric motor using the same. The rotor includes a core which includes a plurality of protrusion portions which are arranged along an outer circumference of the core and protrude radially to an outer portion of the core, and a plurality of concave portions interposed between the protrusion portions; a plurality of permanent magnets which are respectively disposed at the plurality of concave portions; and a plurality of pole pieces which are disposed at the plurality of concave portions and at outer sides of the plurality of permanent magnets. A length of each of the plurality of pole pieces in an axial direction is shorter than a length of each of the plurality of protrusion portions in the axial direction. | 12-25-2014 |