Abstract: A motor-driving apparatus for driving a motor having a plurality of windings respectively corresponding to a plurality of phases is provided. The motor-driving apparatus includes a first inverter having a plurality of first switching devices and connected to first ends of the plurality of windings and a second inverter having a plurality of second switching devices and connected to second ends of the plurality of windings. A third switching device is configured to selectively connect and disconnect points at which a number of turns of each of the windings is divided in a preset ratio. A controller is configured to adjust an on/off state of the first to third switching devices based on required output of the motor.

Abstract: A connector having a shield structure includes a housing, an outer case connected to the housing, an inner case disposed between the housing and the outer case, and a shield structure surrounding the inner case. The connector includes a first cable having a first line, a first inner cover surrounding the first line, and a first cable shield surrounding the first inner cover and connected to the shield structure. The connector includes a second cable having a second line, a second inner cover surrounding the second line, and a second cable shield surrounding the second inner cover and connected to the shield structure. The connector includes a ground terminal electrically connecting the first cable shield and the second cable shield to a first ground, and a ground cable connected to the ground terminal and electrically connecting the first cable shield and the second cable shield to a second ground.

Abstract: An embodiment solid electrolyte includes a first compound and a second compound. The first compound is represented by a first chemical formula Li7-aPS6-a(X11-bX2b)a, wherein X1 and X2 are the same or different and each represents F, Cl, Br, or I, and wherein 0<a?2 and 0<b<1, and the second compound is represented by a second chemical formula Li7-cP1-2dMdS6-c-3d(X11-eX2e)c, wherein X1 and X2 are the same or different and each represents F, Cl, Br, or I, wherein M represents Ge, Si, Sn, or any combination thereof, and wherein 0<c?2, 0<d<0.5, and 0<e<1.

Abstract: The present invention provides a portable power storage device, and in particular, a portable power storage device with a self-generation and nano-capacitor storage structure. The portable power storage device includes: opposite fixed magnet plates disposed on both sides of a main body and having a plurality of radially arranged induction magnet bodies; and a rotating coil plate disposed between the opposite fixed magnet plates and having a plurality of radially arranged coil bodies to perform mutual induction action with the induction magnet bodies, such that when the rotating coil plate is rotated or reciprocated, electric charges are induced in the coil bodies by the induction magnet bodies to generate current, thereby electricity may be easily generated and used at all times regardless of the location, as well as the stored electricity may be output and used in a portable electric device as necessary.

Abstract: A fluid level measurement system using a buoyant body includes a guide part installed in a direction perpendicular to the bottom surface of a fluid storage tank, and provided with a space in which a fluid can move therein; a buoyant body inserted into the guide part, and configured to float along the surface of the fluid inside the guide part; and a measurement part coupled to the top end of the guide part, and configured to measure the level of the surface of the fluid inside the fluid storage tank by transmitting a signal toward the buoyant body in the inner space of the guide part and then receiving a signal reflected from the buoyant body.

Abstract: The present invention relates to a disc brake, and more specifically, to a disc brake apparatus using a generator-combined motor means, the disc brake apparatus comprising a fixed plate which has coil elements arranged radially and rotating plates which have magnet bodies arranged radially and corresponding to the coil elements, wherein: electric attraction between the fixed plate and the rotating plates enables primary braking and friction therebetween enables secondary braking, so as to minimize the occurrence of metal powder in a braking process, thereby preventing environmental pollution; and an electric reaction between the coil elements and the magnet bodies enables production of electricity, which can be used for power generation and to ensure electromotive power, thereby further improving use efficiency of the present invention.

Abstract: The present invention relates to a wheel including a means for power generation and transfer having a plurality of auxiliary power units in which compartments are formed inside one wheel, and a plurality of auxiliary power units capable of generating auxiliary power separately from a main power source are installed in the compartments, such that it is possible to secure increased driving force and rotational force while minimizing costs required for securing compartments required to facilitate a separate auxiliary power source, as well as decrease a used power due to driving an apparatus using the auxiliary power, and by reasonably solving the problems entailed in the wheel including a means for power generation and transfer, efficiency thereof is significantly improved.

Abstract: The present invention relates to a coreless donut-type fan, and more particularly, to a coreless donut-type motor fan for ventilation and cooling, in which a rotating force is generated by wings themselves, without a separate rotational power such as a motor provided in a central portion thereof, and a through hole is formed in the central portion thereof to prevent a “wind barrier” phenomenon during rotation at a high speed, thereby maintaining smooth air flow, minimizing power consumption, in particular, preventing rotational noise due to induction of smooth rotation, and improving rotational efficiency.

Abstract: A high efficiency charging apparatus, includes a power supply which is a source for supplying electricity for charging; a speed setting unit setting an oscillating frequency and outputting an electrical self-oscillating signal having a frequency corresponding to the oscillating frequency; a switching unit having a plurality of switches which are driven by the electrical self-oscillating signal supplied from the speed setting unit; and a power transmitting unit supplying a current from the power supply to a capacitor multiple times according to a drive state of the plurality of switches of the switching unit and discharging the current charged in the capacitor at one time to supply the discharged current to the battery. The charging apparatus improves charging efficiency and reduces a charging time of a lead or nickel battery used in a vehicle or the like.

Abstract: The present invention relates to a coreless donut-type fan, and more particularly, to a coreless donut-type motor fan for ventilation and cooling, in which a rotating force is generated by wings themselves, without a separate rotational power such as a motor provided in a central portion thereof, and a through hole is formed in the central portion thereof to prevent a “wind barrier” phenomenon during rotation at a high speed, thereby maintaining smooth air flow, minimizing power consumption, in particular, preventing rotational noise due to induction of smooth rotation, and improving rotational efficiency.

Abstract: The present invention relates to a wheel including a means for power generation and transfer having a plurality of auxiliary power units in which compartments are formed inside one wheel, and a plurality of auxiliary power units capable of generating auxiliary power separately from a main power source are installed in the compartments, such that it is possible to secure increased driving force and rotational force while minimizing costs required for securing compartments required to facilitate a separate auxiliary power source, as well as decrease a used power due to driving an apparatus using the auxiliary power, and by reasonably solving the problems entailed in the wheel including a means for power generation and transfer, efficiency thereof is significantly improved.

Abstract: A refrigerator having a mid-front plate structure that provides a superior coupling strength with respect to a middle wall while ensuring a simple shape and a high strength. The refrigerator includes a coupling member which is fixed to a front surface of the middle wall such that the mid-front plate is fixed to the middle wall. The mid-front plate includes an interior space to accommodate the coupling member and an insertion hole part allowing the coupling member to be inserted into the interior space therethrough. The mid-front plate is fixed to the middle wall by moving the mid-front plate toward the middle wall such that the coupling member fixed to the middle wall is inserted into the interior space and then by pushing the mid-front plate to one side.

Abstract: An improved generator for using waterpower, wave-power or wind-power, comprising; a set of magnet plates and coil plates for mounting on a rotating shaft in parallel, the magnets installed on the magnet plates and the generating coils installed on the coil plates with constant-intervals in radial direction, a plurality of blades obliquely installed on circumference of the magnet plates and coil plates with mutually opposite direction, an inner annular cylinder and outer annular cylinder mounted on the coil plates to form annular container for inserting the magnets. A plurality of induction coils installed on the inner annular cylinder, a plurality of electromotive coils installed on the outer annular cylinder for proximately contact with ends of the magnets. The magnet plates and coil plates rotate in mutually opposite direction to enhance the quality of generation and repulsive force.

Abstract: Disclosed is a bicycle which is a means of short-distance movement favored by men and women of all ages. The present invention is an application of a bicycle having a motor-generator disclosed in Korean Patent Application No. 2009-035298 that the applicant of the present invention filed. Namely, a motor-generator is mounted on a side of the rear wheel of the bicycle, and a control box and a battery are mounted under the main pipe of the bicycle, and a change-over switch and a change speed switch are mounted on the handle of the bicycle. The present invention makes it possible to charge quickly and effectively via a motor-generator that is operated by the bicycle driving force on a downhill or level ground, and with charging made, the rotary force of the motor-generator is conveyed to the rear wheel to generate electric power, so that electromotive force is produced and stored by itself, and the driving force of the bicycle can be obtained by using the stored electric power.

Abstract: A refrigerator having a mid-front plate structure that provides a superior coupling strength with respect to a middle wall while ensuring a simple shape and a high strength. The refrigerator includes a coupling member which is fixed to a front surface of the middle wall such that the mid-front plate is fixed to the middle wall. The mid-front plate includes an interior space to accommodate the coupling member and an insertion hole part allowing the coupling member to be inserted into the interior space therethrough. The mid-front plate is fixed to the middle wall by moving the mid-front plate toward the middle wall such that the coupling member fixed to the middle wall is inserted into the interior space and then by pushing the mid-front plate to one side.

Abstract: A high efficiency charging apparatus, comprising a power supply which is a source for supplying electricity for charging; a speed setting unit setting an oscillating frequency and outputting an electrical self-oscillating signal having a frequency corresponding to the oscillating frequency; a switching unit having a plurality of switches which are driven by the electrical self-oscillating signal supplied from the speed setting unit; and a power transmitting unit charging current in the power supply multiple times according to a drive state of the plurality of switches of the switching unit and discharging the charged current at a time to supply the discharged current to the battery. The charging apparatus improves charging efficiency and reduces a charging time of a lead or nickel battery used in a vehicle or the like.

Abstract: Disclosed is a bicycle which is a means of short-distance movement favored by men and women of all ages. The present invention is an application of a bicycle having a motor-generator disclosed in Korean Patent Application No. 2009-035298 that the applicant of the present invention filed. Namely, a motor-generator is mounted on a side of the rear wheel of the bicycle, and a control box and a battery are mounted under the main pipe of the bicycle, and a change-over switch and a change speed switch are mounted on the handle of the bicycle. The present invention makes it possible to charge quickly and effectively via a motor-generator that is operated by the bicycle driving force on a downhill or level ground, and with charging made, the rotary force of the motor-generator is conveyed to the rear wheel to generate electric power, so that electromotive force is produced and stored by itself, and the driving force of the bicycle can be obtained by using the stored electric power.

Abstract: Disclosed is a generator that can produce electric power using water power, wave power or wind power. The generator characterized in that a plurality of magnet plates and separately-arranged coil plates are constructed in such a way that they can rotate in mutually opposing directions, and these magnet plates and coil plates are continuously and sequentially arranged on a rotating shaft, and a plurality of induction coils and electromotive coils installed on inner and outer cylinders proximate to the opposed ends of magnets arranged on the magnet plates are separately arranged on the coil plates. According to the generator, it is possible to obtain a further increased quantity of generation by means of the magnet plates and coil plates that rotate in mutually opposing directions even in the case that water power or wind power used in generation is weak.