Abstract: An apparatus for preventing discharge of a battery for an automobile includes a cleaner driven using the battery for an automobile, a rotation sensing unit sensing a rotation speed of the cleaner, and a controlling unit receiving information on the rotation speed of the cleaner from the rotation sensing unit and transmitting a signal externally. Whether or not the cleaner is driven is controlled in response to a driving signal of the controlling unit.

Abstract: Embodiments of the invention provide a piezoelectric blower, including a first diaphragm comprising a first piezoelectric element disposed at an outer surface thereof, a second diaphragm comprising a second piezoelectric element disposed at the outer surface thereof and disposed to be spaced, in parallel, apart from the first diaphragm, and a rim disposed along circumferences of an edge of the first diaphragm and an edge of the second diaphragm. The piezoelectric blower further includes a blower chamber defined by the first diaphragm, the second diaphragm, and the rim, and an opening through which air is sucked and discharged into and from a blower chamber.

Abstract: Disclosed herein is a switched reluctance motor comprising: a rotor having a shaft disposed at a central portion thereof and having salient poles formed at an outer circumference thereof; a stator having the rotor rotatably installed therein while forming a gap and having salient poles facing the salient poles of the rotor; and an extraction pressure decreasing unit separating the rotor and the stator from a mold, wherein the rotor and the stator are made of a soft magnet composite (SMC).

Abstract: An axial flux permanent magnet motor includes a shaft, a rotor extending from the shaft in a radial direction, the rotor being rotatably mounted on the shaft, a magnet part disposed on the rotor to face downwardly in an axial direction, the magnet part having N poles and S poles, alternately disposed in a circumferential direction, a support member extending from the shaft in a radial direction, the support member being disposed below the rotor in the axial direction, and an electromagnet part disposed on the support member to face the magnet part in the axial direction. An axial distance between facing surfaces of the magnet part and the electromagnet part repeatedly changes in the circumferential direction.