Abstract: Disclosed is motor driven power steering system of a redundancy structure. The system includes a driving motor that drives a steering wheel, first and second power circuits that supply control power, first and second driving circuits that drive the driving motor, first and second position sensors that detect a rotational position of the driving motor, and first and second processors operatively coupled to the driving motor. The first processor and second processors are operatively coupled to respective redundant elements of the power circuits, the position sensors, and the driving circuits. Each of first processor and the second processor independently receives steering control signals from the upper-level control device to allow the driving circuits to be operated based on the respective position sensors, thereby allowing the driving motor to be operated.

Abstract: There is provided a vibrator including: a housing including an internal space; an elastic member mounted within the internal space so as to be elastically deformed; and a piezo actuator mounted on one surface of the elastic member, wherein the elastic member includes a reinforcement emboss protruding toward a surface opposite to a surface on which the piezo actuator is mounted in a portion on which the piezo actuator is mounted.

Abstract: There is provided a vibrator including: a housing having an internal space and having at least one through-hole formed therein; a vibrator disposed in the housing and vibrating; and an impact damping member installed on at least one of outer surfaces of the housing and damping impact, wherein the vibrator has protrusions disposed thereon so as to correspond to the through-hole and contacting the impact damping member while penetrating the through-hole at the time of external impact.

Abstract: There is provided a vibration generating device including: a housing having an internal space; a vibrating member of which both end portions are fixed to the housing; a piezoelectric element fixed to a top surface of the vibrating member; a mass body disposed on the piezoelectric element; and a coupling member connecting the mass body and the vibrating member to each other and including a hook portion connected to the vibrating member by elastic deformation.

Abstract: There is provided a vibrator including: a housing having an internal space and having at least one through-hole formed therein; a vibrator disposed in the housing and vibrating; and an impact damping member installed on at least one of outer surfaces of the housing and damping impact, wherein the vibrator has protrusions disposed thereon so as to correspond to the through-hole and contacting the impact damping member while penetrating the through-hole at the time of external impact.

Abstract: There is provided a vibrator including: a housing including an internal space; an elastic member mounted within the internal space so as to be elastically deformed; and a piezo actuator mounted on one surface of the elastic member, wherein the elastic member includes a reinforcement emboss protruding toward a surface opposite to a surface on which the piezo actuator is mounted in a portion on which the piezo actuator is mounted.

Abstract: There is provided a spindle motor including: a sleeve rotatably supporting a shaft; a sleeve holder supporting the sleeve and formed through a pressing process; a stator core fixedly mounted on an outer circumferential surface of the sleeve holder; and a pulling magnet fixedly mounted on an upper surface of the stator core, wherein the stator core includes a burr insertion stepped part formed in a lower portion of an inner diameter portion thereof.

Abstract: A spindle motor includes a rotor including a rotary shaft and magnets, a stator including a bearing, which supports the rotary shaft, and an armature corresponding to the magnets. The rotor is caused to rotate by an electromagnetic force generated by the magnets and the armature. The stator includes a plate having a stepped portion in a portion thereof, which faces the rotary shaft.

Abstract: There are provided a bearing assembly and a motor including the same capable of securing shaft system reliability while maintaining motor slimness. The bearing assembly includes a sleeve supporting a shaft via oil; and a sleeve holder having the sleeve inserted thereinto and fixedly supporting the sleeve, wherein an upper end of the sleeve is protruded from the sleeve holder to be higher than an upper end of the sleeve holder in an upward axial direction.

Abstract: Disclosed herein is a spindle motor. In the spindle motor according to the present invention, a thrust part is disposed at a lower portion of a shaft, and a support part surface-contacting a lower end of the shaft is formed at the thrust part so as to have a round shape, thereby making it possible to easily prevent a wobble phenomenon of a rotor due to a gap in a shaft system. In addition, a guide part is formed to be protruded at the thrust part to lock the shaft including a narrow part formed therein, thereby making it possible to easily prevent floating of the rotor.

Abstract: Disclosed herein is a spindle motor. The spindle motor includes a main magnet formed to have an asymmetrical cross section without a pulling magnet according to the prior art that has been installed on an upper end of a core in order to prevent floating of a rotor, such that the main magnet may prevent the floating of the rotor instead of the pulling magnet.

Abstract: Disclosed herein is a spindle motor in which a space part is formed between a shaft and a rotor case and a hooker part and a fixing part coupled to each other are formed at a bearing holder and a rotor case, respectively, thereby making it possible to easily prevent floating of a rotor without using a separate component.

Abstract: Disclosed herein is a spindle motor including: a shaft insertedly mounted so as to be perpendicular to an upper side portion; a sleeve receiving the shaft therein to thereby rotatably support the shaft and forming a space between the sleeve and the shaft to thereby be spaced apart from the shaft so as not to contact the shaft; a holder having the sleeve mounted in an inner portion thereof and having a lower portion mounted on an upper portion of a plate; and the plate integrally supporting lower portions of the shaft and the sleeve and including connecting parts connecting the holder and the plate to each other and fixing parts fixing positions of the holder and the plate so that a lower surface of the holder is coupled thereto.

Abstract: Disclosed herein is spindle motor including a rotating part, including: a rotating shaft and a magnet; a fixing part including a bearing supporting the rotating shaft, an armature opposite to the magnet, a printed circuit board applying power to the armature, and a base plate coupled with the rotating part, wherein the rotating part rotates by electromagnetic force of the magnet and the armature, and an end of the base plate contacting the printed circuit board is provided with a downward inclined part having a round shape so as to be coupled with the printed circuit board.

Abstract: There is provided a spindle motor including: a sleeve rotatably supporting a shaft; a sleeve holder supporting the sleeve and formed through a pressing process; a stator core fixedly mounted on an outer circumferential surface of the sleeve holder; and a pulling magnet fixedly mounted on an upper surface of the stator core, wherein the stator core includes a burr insertion stepped part formed in a lower portion of an inner diameter portion thereof.

Abstract: A spindle motor includes a rotor including a rotary shaft and magnets, a stator including a bearing, which supports the rotary shaft, and an armature corresponding to the magnets. The rotor is caused to rotate by an electromagnetic force generated by the magnets and the armature. The stator includes a plate having a stepped portion in a portion thereof, which faces the rotary shaft.

Abstract: Disclosed herein is a spindle motor including: a rotor including a rotational axis and a magnet; and a stator including a bearing supporting the rotational axis and an armature corresponding to the magnet; wherein the rotor rotates by electromagnetic force between the magnet and the armature, the stator includes a printed circuit connected to the armature and having a hole for both set assembling and grounding formed therein; and a base plate having the printed circuit board coupled to an upper surface thereof so as to be stacked thereon and having a hole for both set assembling and grounding formed therein, the hole for both set assembling and grounding corresponding to the hole for both set assembling and grounding of the printed circuit board, and the hole for both set assembling and grounding of the printed circuit board and the hole for both set assembling and grounding of the base plate are fixed and grounded to a set.