Abstract: A motor controller is capable of swiftly driving a motor at the initial stage and driving the motor with high efficiency and low power consumption after swiftly driving the motor at the initial stage by including a first capacitor connected in series with a common terminal to which the main coils and the sub-coils of the motor are connected and a PTC thermistor (Positive Temperature Coefficient thermistor) connected in parallel with the first capacitor.

Abstract: A speed control system of a fan motor of an air conditioner is disclosed. A speed control system of a fan motor of an air conditioner comprises: an inverter having a power output terminal connected to a single-phase power input terminal of the fan motor which has a single-phase stator including a main coil and a sub coil, an induction rotor and a permanent magnet rotor installed between the stator and the induction rotor; and a three-phase driving motor connected to the power output terminal of the inverter and driving a compressor of an air conditioner by power received from the inverter.

Abstract: A hybrid induction motor comprises a stator fixedly installed in a casing, an induction rotor rotatably inserted into a center of the stator and having a shaft at a center thereof, a first synchronous rotor slid in a longitudinal direction of the shaft between the stator and the induction rotor and free-rotatably installed in a circumferential direction of the shaft, and a second synchronous rotor facing the first synchronous rotor, slid in a longitudinal direction of the shaft between the stator and the induction rotor, and free-rotatably installed in a circumferential direction of the shaft.

Abstract: An apparatus for controlling a speed of a fan motor (HIM (Hybrid Induction Motor)) of an air-conditioner extends a speed control range of a fan motor of an air-conditioner by controlling revolutions per minute (RPM) of the fan motor. In order to extend the speed control range of the HIM, an RPM of the HIM is controlled based on a pre-set duty ratio of a switching device electrically connected with the HIM.

Abstract: An apparatus for controlling a speed of a fan motor of an air-conditioner includes a frequency and voltage phase converter for simultaneously varying a voltage phase and frequency of a commercial AC power according to a control signal and applying a voltage varied according to the varied frequency and voltage phase to a fan motor of the air-conditioner; a zero voltage detector for receiving the commercial AC power and detecting a zero voltage of a voltage wave of the commercial AC power; and a microcomputer electrically connected with the zero voltage detector and the frequency and voltage phase converter, generating the control signal providing a predetermined frequency switching pattern according to a frequency command based on a point when the zero voltage is generated, and outputting the control signal to the frequency and voltage phase converter.

Abstract: A single-phase induction motor comprises a stator having a stator coil; an induction cage rotor rotatably inserted into a receiving groove of the stator, having a rotation shaft at a center thereof, having a plurality of first conductor bars at an outer peripheral portion thereof with the same interval in a circumferential direction, having a protrusion portion at an outer circumferential surface thereof, and having a plurality of second conductor bars installed at the protrusion portion in a circumferential direction; and a permanent magnet rotor free-rotatably installed between the stator and the induction cage rotor.

Abstract: A speed control system of a fan motor of an air conditioner is disclosed. A speed control system of a fan motor of an air conditioner comprises: an inverter having a power output terminal connected to a single-phase power input terminal of the fan motor which has a single-phase stator including a main coil and a sub coil, an induction rotor and a permanent magnet rotor installed between the stator and the induction rotor; and a three-phase driving motor connected to the power output terminal of the inverter and driving a compressor of an air conditioner by power received from the inverter.

Abstract: A single phase induction motor includes a stator, an induction cage rotor rotatably installed in a center portion of the stator and having a shaft fixed at its center; and a permanent magnet freely rotatably installed between the stator and the induction cage rotor and having a first magnetization portion and a second magnetization portion.

Abstract: A motor controller is capable of swiftly driving a motor at the initial stage and driving the motor with high efficiency and low power consumption after swiftly driving the motor at the initial stage by including a first capacitor connected in series with a common terminal to which the main coils and the sub-coils of the motor are connected and a PTC thermistor (Positive Temperature Coefficient thermistor) connected in parallel with the first capacitor.

Abstract: A motor controller is capable of swiftly driving a motor at the initial stage and driving the motor with high efficiency and low power consumption after swiftly driving the motor at the initial stage by including a first capacitor connected in series with stator coils of the motor and a PTC thermistor (Positive Temperature Coefficient thermistor) connected in parallel with the first capacitor.

Abstract: A semiconductor package and packaging method using a flip-chip bonding technology is disclosed. In the semiconductor package and packaging method, the microelement array of a micro-device, for example, the micromirror array of a light modulator having micromirrors that are hyperfine elements, is sealed from the outside using flip-chip bonding technology. Thus, the microelement array is protected from the outside. The packaging method executes the packaging process using only the flip-chip bonding technology, without a wire-bonding technology, at a wafer level instead of a conventional individual semiconductor device level, thus increasing the bonding process efficiency. Furthermore, the electrode array pattern for supplying both electricity and control signals to the microelement array does not pass through a hermetic sealing layer, thus ensuring a well-sealed semiconductor package. The electrode array pattern is also finely formed to correspond to the microelement array which is extremely finely formed.

Abstract: Disclosed is a diffractive micromirror and a method of producing the same. More particularly, the present invention pertains to a diffractive micromirror, in which a recess having a desired depth and width is precisely formed in a piezoelectric operation manner, and a method of producing the same.

Abstract: Disclosed is a diffractive micromirror and a method of producing the same. More particularly, the present invention pertains to a diffractive thin-film piezoelectric micromirror, which is operated in a piezoelectric operation manner to assure excellent displacement, operation speed, reliability, linearity, and low voltage operation, and a method of producing the same. The diffractive thin-film piezoelectric micromirror includes a silicon substrate on which a recess is formed to provide an air space to the center thereof, and a piezoelectric mirror layer having a band shape, which is attached to the silicon substrate along both ends of the recess at both ends thereof while being spaced from the bottom of the recess at a center portion thereof and which includes a thin-film piezoelectric material layer to be vertically movable when voltage is applied to the piezoelectric material layer, and thus diffracts an incident light beam.

Abstract: An electric motor includes: a stator having a plurality of first coils with a rotor receiving part formed inside thereof and generating a rotating magnetic field and a plurality of second coils making a pair with the first coils and generating an induction magnetic field induced by the magnetic field of the first coils; a first rotor formed as a hollow permanent magnet, installed in the rotor receiving part and rotated by the magnetic field formed in the first coils and the second coils of the stator; and a second rotor having a rotational shaft fixedly installed at a center of the second rotor, and being installed inside the first rotor so as to be rotated by rotation of the first rotor.

Abstract: Disclosed is a stator of an induction motor, the induction motor comprising: a stator provided with a main winding coil and an auxiliary winding coil at a plurality of slots formed at a body of the stator; an induction rotor rotatably inserted into the stator; and a magnet rotor rotatably inserted between the stator and the induction rotor. Coil spans, intervals between the slots of the stator, are different each other thus to have an increased counter electromotive force induced to the main winding coil at the time of driving, thereby enhancing efficiency of the motor. Also, end lengths of the main winding coil and the auxiliary winding coil become short and the structure becomes simple, thereby reducing a consumption amount of the coil and facilitating a coil winding work.

Abstract: A line start reluctance synchronous motor comprises: a single phase stator arranged at an inner circumferential surface of a motor body and on which a main coil and a sub coil are wound; a magnet unit free-rotatably arranged along an inner circumferential surface of the stator in order to maintain an air gap with the stator; and a cage rotor provided with a rotation shaft at a center portion thereof to be rotatable along an inner circumferential surface of the magnet unit, provided with a cage bar at a peripheral portion thereof, and provided with magnetic barriers having the same pole numbers as the magnet unit.

Abstract: Disclosed is a stator of an induction motor, the induction motor comprising: a stator provided with a main winding coil and an auxiliary winding coil at a plurality of slots formed at a body of the stator; an induction rotor rotatably inserted into the stator; and a magnet rotor rotatably inserted between the stator and the induction rotor. Coil spans, intervals between the slots of the stator, are different each other thus to have an increased counter electromotive force induced to the main winding coil at the time of driving, thereby enhancing efficiency of the motor. Also, end lengths of the main winding coil and the auxiliary winding coil become short and the structure becomes simple, thereby reducing a consumption amount of the coil and facilitating a coil winding work.

Abstract: Disclosed is a magnetizing apparatus of an induction motor comprising: an outer magnetizer arranged at an outer circumferential surface of a magnetic substance that forms a magnet of an induction motor, for magnetizing the outer circumferential surface of the magnetic substance; an inner magnetizer arranged at an inner circumferential surface of the magnetic substance, for magnetizing the inner circumferential surface of the magnetic substance; and a magnetizing power supplier for supplying a magnetizing power source to the outer magnetizer and the inner magnetizer. The outer and inner circumferential surfaces of the magnetic substance are simultaneously magnetized, so that a magnetized area of the magnetic substance is increased, a magnetic force of the magnet is increased, and a motor efficiency is enhanced.

Abstract: The present invention provides a micro inertia sensor and a method of manufacturing the same, the micro inertia sensor includes a lower glass substrate; a lower silicon including a first border, a first fixed point and a side movement sensing structure; an upper silicon including a second border, a second fixed point being connected to a via hole, in which a metal wiring is formed, on an upper side, and an sensing electrode, which correspond to the first border, the first fixed point and the side movement sensing structure; a bonded layer by a eutectic bonding between the upper silicon and the lower silicon; and a upper glass substrate, being positioned on an upper portion of the upper silicon, for providing the via hole on which an electric conduction wiring is formed, thereby aiming at the miniaturization of the product and the simplification of the process.

Abstract: A skeleton type brushless motor comprises: a rotor in which a rotational shaft is pressed and fixed; a stator including a first stator core and a second stator core in which rotor receiving parts for receiving the rotor are formed, a coil winding unit coupled to the stator cores, and a coil wound on the coil winding unit; and the first and second stator cores are separated and faces each other centering around the rotational shaft of the rotor, whereby a leakage flux is reduced and maneuverability and efficiency are increased.