Abstract: A motor is provided. The motor includes a stator, a rotor rotatably disposed in the stator, and a motor shaft provided in the rotor to rotate integrally with the rotor. The rotor includes at least one permanent magnet fixing core, at least one injection fixing core alternately stacked with the at least one permanent magnet core in a direction of the motor shaft, a plurality of permanent magnets inserted at a predetermined interval in the at least one permanent magnet fixing core and the at least one injection fixing core, and an injection ring formed to cover the at least one permanent magnet fixing core, the at least one injection fixing core, and the plurality of permanent magnets. The at least one permanent magnet fixing core is formed to prevent the permanent magnets from becoming separated from the rotor by a centrifugal force, and the at least one injection fixing core is formed to prevent the injection ring from becoming separated from the rotor by the centrifugal force.

Abstract: A grain refiner for a magnesium alloy according to the present invention contains aluminum (Al) and manganese (Mn), and contains a compound of aluminum (Al) and manganese (Mn) in the microstructure thereof, wherein the grain refiner is composed of a structure in which, in the compound of aluminum (Al) and manganese (Mn), the area of the compound having an Al/Mn compositional (atomic) ratio of 4-4.5 is larger than the area of the compound having an Al/Mn compositional (atomic) ratio of 5.5-6.5. When the grain refiner is added to molten magnesium, crystal grains can be refined to 50-100 ?m.

Abstract: Disclosed are a magnesium (Mg) alloy and a manufacturing method thereof. The Mg alloy has a composition including, by weight, 4% to 10% of Sn, 0.05% to 1.0% of Ca, 0.1% to 2% of at least one element selected from the group including Y and Er, the balance of Mg, and the other unavoidable impurities. The Mg alloy includes an Mg2Sn phase having excellent thermal stability, and is capable of being heat treated at a temperature of 480° C. or more.

Abstract: A rotor is and a motor including the rotor and a stator are provided. The rotor includes a rotor core and rotor poles. The rotor poles are arranged circumferentially around the rotor core, and each of the rotor poles is formed in an asymmetric shape. The stator is spaced apart from the rotor and includes slots which are configured so that a coil may be wound around the slots.

Abstract: A motor is provided. The motor includes a stator, a rotor rotatably disposed in the stator, and a motor shaft provided in the rotor to rotate integrally with the rotor. The rotor includes at least one permanent magnet fixing core, at least one injection fixing core alternately stacked with the at least one permanent magnet core in a direction of the motor shaft, a plurality of permanent magnets inserted at a predetermined interval in the at least one permanent magnet fixing core and the at least one injection fixing core, and an injection ring formed to cover the at least one permanent magnet fixing core, the at least one injection fixing core, and the plurality of permanent magnets. The at least one permanent magnet fixing core is formed to prevent the permanent magnets from becoming separated from the rotor by a centrifugal force, and the at least one injection fixing core is formed to prevent the injection ring from becoming separated from the rotor by the centrifugal force.

Abstract: A grain refiner for a magnesium alloy according to the present invention contains aluminum (Al) and manganese (Mn), and contains a compound of aluminum (Al) and manganese (Mn) in the microstructure thereof, wherein the grain refiner is composed of a structure in which, in the compound of aluminum (Al) and manganese (Mn), the area of the compound having an Al/Mn compositional (atomic) ratio of 4-4.5 is larger than the area of the compound having an Al/Mn compositional (atomic) ratio of 5.5-6.5. When the grain refiner is added to molten magnesium, crystal grains can be refined to 50-100 ?m.

Abstract: 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.

Abstract: 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.

Abstract: Provided are a method of preparing a magnesium alloy extrudate and a magnesium alloy extrudate prepared thereby. Specifically, the present invention is related to a method of preparing a magnesium alloy extrudate including melting a magnesium alloy raw material (step 1), casting the magnesium alloy raw material melted in step 1 to prepare a magnesium alloy billet (step 2), homogenizing the magnesium alloy billet prepared in step 2 (step 3), applying 3% to 20% of compressive deformation to the homogenized magnesium alloy billet of step 3 (step 4), and extruding the compressive deformed magnesium alloy billet of step 4 (step 5), and a magnesium alloy extrudate prepared thereby.

Abstract: Provided is a method of preparing a nanocrystalline titanium alloy at low strain to have better strength. The present invention is characterized in that an initial microstructure is induced as martensites having a fine layered structure, and then a nanocrystalline titanium alloy is prepared at low strain by optimizing process variables through observation of the effects of strain, strain rate, and deformation temperature on the changes in the microstructure.

Abstract: A method for increasing formability of magnesium alloy sheet and the magnesium alloy sheet prepared by the same are provided, in which the method includes the following steps: forming {10-12} twins in magnesium alloy sheet (step 1); and annealing the magnesium alloy sheet of step 1 (step 2). The present invention also provides the magnesium alloy sheet containing {10-12} twins prepared by the method. Accordingly, the room temperature formability and the warm formability are increased by forming {10-12} twins through deformation on the magnesium alloy sheet and subsequently performing annealing, because it is possible to artificially form {10-12} twins without increasing dislocations in the magnesium alloy sheet and accommodate the deformation generated during the forming via annihilation of the twins.

Abstract: A magnesium alloy having high ductility and high toughness, and a preparation method thereof are provided, in which the magnesium alloy includes 1.0-3.5 wt % of tin, 0.05-3.0 wt % of zinc, and the balance of magnesium and inevitable impurities, and a preparation method thereof. Magnesium alloy with a relatively small tin content is added with zinc, and optionally, with one or more alloy elements selected from aluminum, manganese and rare earth metal, at a predetermined content ratio. As a result, the alloy exhibits superior ductility and moderate strength due to the suppression of excessive formation of precipitates and some precipitates hardening effect, respectively. Accordingly, compared to extruded material prepared from conventional commercial magnesium alloys, higher ductility and toughness are provided, so that the alloy can be widely applied over the entire industries including automotive and aerospace industries.

Abstract: A touch panel which is used as an input device for an electronic device, etc., and an electronic device including the touch panel are provided. A touch panel includes a first substrate, and a second substrate spaced from the first substrate by a distance and having a contact surface. A fluid is filled in a gap between the first substrate and the second substrate, and an input button area is delimited due to movement of the fluid when a driving voltage is applied. If a thickness of the gap between the first substrate and the second substrate is reduced below a threshold thickness value in the input button area, the driving voltage is cut off.

Abstract: A rotor for a motor is provided including: a rotor core including at least one a first coupling portion on an outer circumference thereof, wherein the first coupling portion includes a first coupling groove or a first coupling projection; at least one division core spaced apart from the rotor core and including a second coupling portion on an outer circumference thereof, the second coupling portion including a second coupling groove or a second coupling projection; and a connecting pin including a third coupling portion and a fourth coupling portion, the third coupling portion to be coupled to the first coupling portion and the fourth coupling portion to be coupling to the second coupling portion.

Abstract: Disclosed are a magnesium (Mg) alloy and a manufacturing method thereof. The Mg alloy has a composition including, by weight, 4% to 10% of Sn, 0.05% to 1.0% of Ca, 0.1% to 2% of at least one element selected from the group including Y and Er, the balance of Mg, and the other unavoidable impurities. The Mg alloy includes an Mg2Sn phase having excellent thermal stability, and is capable of being heat treated at a temperature of 480° C. or more.

Abstract: 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.

Abstract: 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.

Abstract: A user input device and electronic apparatus are provided. The user input device includes a first substrate on which first electrodes are formed; a second substrate disposed to be spaced apart from the first substrate, and on which second electrodes are formed; an electro-rheological fluid contained in a gap between the first substrate and the second substrate; and one or more lighting keypad units disposed on the second substrate. Each of the lighting keypad unit includes one or more key symbols which are different from one another. The electronic apparatus includes one or more user input devices.

Abstract: The present invention relates to a method of manufacturing magnesium alloy processing materials capable of improving low cycle fatigue life. The manufacturing method for magnesium alloy processing materials with improved low cycle fatigue life comprises pre-straining a magnesium alloy processing material which is processed.

Abstract: A rotor for a motor is provided including: a rotor core including at least one a first coupling portion on an outer circumference thereof, wherein the first coupling portion includes a first coupling groove or a first coupling projection; at least one division core spaced apart from the rotor core and including a second coupling portion on an outer circumference thereof, the second coupling portion including a second coupling groove or a second coupling projection; and a connecting pin including a third coupling portion and a fourth coupling portion, the third coupling portion to be coupled to the first coupling portion and the fourth coupling portion to be coupling to the second coupling portion.