Abstract: An induction heating apparatus is provided. The induction heating apparatus includes a heating coil configured to heat an object to be heated, a full-bridge type inverter configured to supply power to the heating coil, a capacitor provided between an intermediate node of one arm of the inverter and one end of the heating coil, and a first relay provided between the intermediate node and the other end of the heating coil 30. An intermediate node of the other arm of the inverter and an intermediate point of the heating coil are connected through a first wire. The induction heating apparatus includes a processor configured to open or close the first relay based on an impedance of the object to be heated.

Abstract: An induction heating device using a resonance circuit method and a control method thereof that are capable of preventing occurrence of overcurrent even when an object is moved are provided. The induction heating device for heating an object includes a resonance circuit including a heating coil and a condenser, an inverter configured to supply power to the resonance circuit, a detector configure to detect a value related to a movement of the object, and at least one processor configured to identify whether the object is moved based on the value detected by the detector, and upon determining that the object is moved, lower a driving frequency of the inverter and an output of the inverter.

Abstract: An induction heating apparatus is provided. The induction heating apparatus includes a heating coil, an inverter, a current sensor configured to measure a driving current supplied from the inverter to the heating coil, and a controller configured to provide a drive signal to the inverter to allow the driving current to follow a target current based on a user input. The controller reduces a driving duty of the drive signal based on the driving current exceeding a predetermined reference current, and the controller provides a drive signal to the inverter to allow the driving current to follow a current less than the target current, based on the driving current being less than or equal to the predetermined reference current after reducing the driving duty of the drive signal.

Abstract: An induction heating cooker for achieving high output of power and small thickness is provided. The induction heating cooker includes a main body provided at an upper side with a top plate, a heating coil to induction-heat a heating object loaded on the top plat, and a blower device configured to draw external air into the main body and blow the air into the heating coil. The heating coil and the blower device are accommodated in the main body. The main body is provided therein with a first flow path allowing air blown by the blowing device to be supplied toward the heating coil from an outer periphery side and a second flow path allowing air blown by the blowing device to be supplied toward the heating coil from a lower side.

Abstract: Disclosed herein is a washing machine. The washing machine includes a housing provided with an inlet for laundry disposed on a front surface thereof, a water tub provided inside of the housing and configured to store water, a drum rotatably provided inside of the water tub, a pulsator provided inside of the drum and configured to be rotated independently of the drum, a motor provided with a stator, and a first and second rotor connected to the drum and the pulsator, respectively, and at least one processor configured to apply a q-axis current to the stator to rotate the second rotor and configured to apply a d-axis current to the stator to rotate the first rotor based on a phase difference between the first rotor and the second rotor.

Abstract: The present disclosure includes a washing machine including an inner rotor and an outer rotor. An outer rotor and an inner rotor may be rotated in a synchronous rotation mode or a counter rotation mode by converting the number of magnetic poles of the outer rotor. When the outer rotor becomes inoperable when the outer rotor is set to the number of magnetic poles for performing the counter rotation mode, it is converted to the number of magnetic poles for performing the synchronous rotation mode while the outer rotor is stopped.

Abstract: Provided is a washing machine including: a stator including a coil; a rotor including a plurality of variable magnets each having a magnetic force variable, and rotatable with respect to the stator; a controller configured to control an energizing of the coil to increase or decrease a magnetic force of the variable magnet; and a plurality of position sensors each having a output voltage changed according to a magnetic flux of the variable magnet.

Abstract: Disclosed herein is a washing machine. The washing machine includes a housing provided with an inlet for laundry disposed on a front surface thereof, a water tub provided inside of the housing and configured to store water, a drum rotatably provided inside of the water tub, a pulsator provided inside of the drum and configured to be rotated independently of the drum, a motor provided with a stator, and a first and second rotor connected to the drum and the pulsator, respectively, and at least one processor configured to apply a q-axis current to the stator to rotate the second rotor and configured to apply a d-axis current to the stator to rotate the first rotor based on a phase difference between the first rotor and the second rotor.

Abstract: The present disclosure includes a washing machine including an inner rotor and an outer rotor. An outer rotor and an inner rotor may be rotated in a synchronous rotation mode or a counter rotation mode by converting the number of magnetic poles of the outer rotor. When the outer rotor becomes inoperable when the outer rotor is set to the number of magnetic poles for performing the counter rotation mode, it is converted to the number of magnetic poles for performing the synchronous rotation mode while the outer rotor is stopped.

Abstract: Provided is a washing machine including: a stator including a coil; a rotor including a plurality of variable magnets each having a magnetic force variable, and rotatable with respect to the stator; a controller configured to control an energizing of the coil to increase or decrease a magnetic force of the variable magnet; and a plurality of position sensors each having a output voltage changed according to a magnetic flux of the variable magnet.

Abstract: A power conversion system includes a controller to control discharge of a smoothing condenser based on at least one signal received through an input. The at least one signal indicates a failure of a discharge circuit configured to discharge the smoothing condenser The controller controls discharge of stored charge in the smoothing condenser through parasitic resistance components of a power system which includes the smoothing condenser. The power conversion system may be used with an electric vehicle.

Abstract: A power conversion system including a DC main power supply for supplying a DC voltage, boosting circuits for performing a retrogression operation of boosting the DC voltage and comprising driving circuits, an inverter circuit for converting the DC voltage into an AC voltage, a motor/generator for receiving the AC voltage, and a control circuit for outputting a control signal to the driving circuits and stopping an operation of a faulty boosting circuit of the boosting circuits when one of the boosting circuits is faulty, for setting power control values depending on a number of remaining non-faulty boosting circuits of the boosting circuits, and for controlling the remaining non-faulty boosting circuits and the inverter circuit based on the power control values, wherein the inverter circuit and the boosting circuits perform a regeneration operation of supplying regeneration power to the DC main power supply, peripheral equipment, and/or a DC auxiliary power supply.

Abstract: A control device for a hybrid vehicle includes: a current command value calculator configured to calculate torque and a weak field current command values input to the inverter; and a current command value correction calculator configured to calculate torque and weak field current correction values added to the torque and weak field current command values, wherein when an accumulation of electricity of the electricity storage device is equal to or larger than a reference value, the current command value calculator is configured to calculate the torque and weak field current command values to make a load applied to the engine by the motor generator zero, and the current command value correction calculator is configured to calculate the torque and weak field current correction values to make a load applied to the engine by the motor driving system other than the motor generator zero.

Abstract: A power conversion system includes a controller to control discharge of a smoothing condenser based on at least one signal received through an input. The at least one signal indicates a failure of a discharge circuit configured to discharge the smoothing condenser The controller controls discharge of stored charge in the smoothing condenser through parasitic resistance components of a power system which includes the smoothing condenser. The power conversion system may be used with an electric vehicle.

Abstract: An electric vehicle power conversion system may include an exclusive discharge circuit for discharging stored charges of a smoothing condenser. The electric vehicle power conversion system may also include a discharge controller for driving a DC/DC converter if a control circuit for controlling the electric vehicle power conversion system detects a fault of an exclusive discharge circuit, such that the stored charges of the smoothing condenser may be supplied to auxiliary devices or a DC auxiliary power supply and be discharged therethrough.

Abstract: A power conversion system including a DC main power supply for supplying a DC voltage, boosting circuits for performing a retrogression operation of boosting the DC voltage and comprising driving circuits, an inverter circuit for converting the DC voltage into an AC voltage, a motor/generator for receiving the AC voltage, and a control circuit for outputting a control signal to the driving circuits and stopping an operation of a faulty boosting circuit of the boosting circuits when one of the boosting circuits is faulty, for setting power control values depending on a number of remaining non-faulty boosting circuits of the boosting circuits, and for controlling the remaining non-faulty boosting circuits and the inverter circuit based on the power control values, wherein the inverter circuit and the boosting circuits perform a regeneration operation of supplying regeneration power to the DC main power supply, peripheral equipment, and/or a DC auxiliary power supply.

Abstract: A control device for a hybrid vehicle includes: a current command value calculator configured to calculate torque and a weak field current command values input to the inverter; and a current command value correction calculator configured to calculate torque and weak field current correction values added to the torque and weak field current command values, wherein when an accumulation of electricity of the electricity storage device is equal to or larger than a reference value, the current command value calculator is configured to calculate the torque and weak field current command values to make a load applied to the engine by the motor generator zero, and the current command value correction calculator is configured to calculate the torque and weak field current correction values to make a load applied to the engine by the motor driving system other than the motor generator zero.

Abstract: A DC motor 10 includes: a housing 12 having a polygonal cross section; a magnet 20 provided along the inner circumference of the housing 12 and having magnetic poles at the corners of the housing 12; a shaft 22 configured to be inserted into the housing 12 along the axial line of the housing 12; an armature 24 secured to the shaft 22 and provided to face the magnet 20; a commutator 26 fitted to the shaft 22 so as to be coaxial with the armature 24; a columnar carbon brush 30 provided in alignment with the radial direction of the commutator 26 such the end surface of the brush is in sliding contact with the outer circumference of the commutator 26; and a biasing member provided in the housing 12 and configured to bias the carbon brush 30 toward the commutator 26. The carbon brush 30 is provided at a position along the circumference of the housing 12 where the maximum length of the carbon brush 30 is ensured.

Abstract: The present invention is to provide an electromagnetic wave shielding material which comprises a transparent substrate and a fine line pattern formed thereon, wherein the fine line pattern comprises a metal plating film using a physically developed metal silver as a catalytic nucleus and a process for preparing an electromagnetic wave shielding material which comprises exposing a light-sensitive material having a physical development nuclei layer and a silver halide emulsion layer on a transparent substrate in this order, precipitating metal silver with an optional fine line pattern onto the physical development nuclei layer by physical development, then, removing a layer provided on the physical development nuclei layer, and subjecting to plating a metal with the use of the physically developed metal silver as a catalytic nucleus.

Abstract: The present invention is to provide an electromagnetic wave shielding material which comprises a transparent substrate and a fine line pattern formed thereon, wherein the fine line pattern comprises a metal plating film using a physically developed metal silver as a catalytic nucleus and a process for preparing an electromagnetic wave shielding material which comprises exposing a light-sensitive material having a physical development nuclei layer and a silver halide emulsion layer on a transparent substrate in this order, precipitating metal silver with an optional fine line pattern onto the physical development nuclei layer by physical development, then, removing a layer provided on the physical development nuclei layer, and subjecting to plating a metal with the use of the physically developed metal silver as a catalytic nucleus