Abstract: A system for charging a battery for a vehicle using a motor driving system that operates a motor having a plurality of windings is disclose. The system includes a first inverter having a plurality of first switching elements, a DC terminal connected to the battery, and an AC terminal connected to one terminal of the plurality of windings, a second inverter having a plurality of second switching elements, a DC terminal selectively short-circuited/opened with the DC terminal of the first inverter, and an AC terminal connected to the other terminal of the plurality of windings, and a controller configured to control an electric connection state between the DC terminals of the first inverter and the second inverter and an open/short-circuited state of the first switching elements and the second switching elements.

Abstract: A motor driving apparatus includes a first motor including first windings respectively corresponding to phases, a second motor including second windings respectively corresponding phases, a first inverter including first switching elements and connected to a first end of each of the first windings, a second inverter including second switching elements, a first changeover switch including third switching elements respectively connected to a second end of each of the first windings at one end and connected to each other at the other end, a second changeover switch including switches selectively connecting the second inverter with the second end of each of the first windings or the second inverter with a first end of each of the second windings, and a controller configured for controlling the states of the first switching elements, the second switching elements, the third switching elements and the switches based on preset conditions.

Abstract: A motor driving apparatus of driving a motor including a plurality of windings respectively corresponding to a plurality of phases is disclosed. The motor driving apparatus include a first inverter including a plurality of first switching elements and connected to a first end of each of the windings, a second inverter including a plurality of second switching elements and connected to a second end of each of the windings, and a controller configured for controlling ON/OFF states of the first switching elements and the second switching elements based on a required output of the motor, wherein the first inverter may be connected to a first voltage source, the second inverter may be connected to a second voltage source, and the first voltage source and the second voltage source may have different grounds.

Abstract: An inverter driving apparatus includes an inverter including a plurality of legs corresponding to a plurality of phases respectively, a gate driver outputting a pulse width modulation control signal for switching the transistor provided in the leg, a variable resistor circuit connected to a gate end of the transistor, and a switching speed control circuit determining a switching state of the transistor based on the pulse width modulation control signal, adjusting a resistance value of the variable resistor circuit according to the temperature of the transistor based on the determination result, and controlling the switching speed of the transistor.

Abstract: The present disclosure provides a polyalkylene carbonate-based resin having excellent thermal stability, thereby having an improved heat shrinkage phenomenon, and a molded article produced using the same. The polyalkylene carbonate-based resin includes 100 parts by weight of a base resin including a polyalkylene carbonate resin and a polylactide resin, and 5 parts by weight to 10 parts by weight of a heat shrinkage prevention agent, wherein the base resin includes the polyalkylene carbonate resin and the polylactide resin in a weight ratio of 6:4 to 4:6, and the heat shrinkage prevention agent is one or more selected from the group consisting of a polyalkyl(meth)acrylate-based resin, a polyalphaolefin-vinyl acetate-based resin, and a polyoxyalkylene-based resin.

Abstract: A motor driving apparatus includes an inverter that includes a switching element connected between either terminal of a battery and a thermistor insulated from the switching element and that drives a motor through the switching element, a resistor connected between a sensing node to which one end of the thermistor is connected and a terminal of a low source voltage, and a motor controller configured for controlling a relay connected between the battery and the switching element based on a voltage of the sensing node.

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 motor driving apparatus which drives a motor including a plurality of winding portions corresponding to a plurality of phases, respectively, includes a motor including a plurality of winding portions corresponding to a plurality of phases, respectively, a first inverter including a plurality of first switching elements and electrically connected to a first end of each of the winding portions, a second inverter including a plurality of second switching elements and electrically connected to a second end of each of the winding portions, a plurality of third switching elements including first ends electrically connected to the second ends of the plurality of winding portions, respectively, and second ends electrically connected to each other, and a controller.

Abstract: The present disclosure relates to a method for separating an organozinc catalyst from a polyalkylene carbonate polymerization solution, and the method of the present disclosure includes: stirring and aging a polymerization solution including a polyalkylene carbonate resin, an organozinc catalyst, an alkylene oxide and a polymerization solvent; and filtering the polymerization solution after completing the aging.

Abstract: An electrified vehicle having a first inverter having a DC terminal and a plurality of legs respectively connected to one end of each of a plurality of coils of a motor, a second inverter connected to the DC terminal, and including a plurality of legs connected to the other ends of the plurality of coils, respectively, a plurality of transfer switches respectively having one end connected to a neutral terminal for the plurality of coils and the other end connected to the other end of each coil, an overvoltage protection circuit including a clamping switch, a resistor, and a capacitor, and connected to the neutral terminal and the DC terminal, and a controller controlling a turned-on state of the plurality of transfer switches according to the motor driving mode. When the motor is driven, the controller controls a turned-on state of the clamping switch.

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: An air purification module for purifying air includes a photocatalyst filter and a light source unit sequentially arranged in a selected direction. The light source unit is spaced apart from the photocatalyst filter to provide light to the photocatalyst filter and includes a substrate and a light source disposed on the substrate. The substrate includes at least one aperture to control a flow channel and a flow velocity of air so as to improve air purification effects through the photocatalyst filter when the air flows from the substrate towards the photocatalyst filter.

Abstract: An electric vehicle may include a motor system having a motor and an inverter, a main battery and an auxiliary battery, and a controller which controls the main battery to be charged by voltage step-up of power of the auxiliary battery through the motor system during driving of the electric vehicle, and controls the auxiliary battery to be charged by voltage step-down of power of the main battery through the motor system when charging the main battery through an external power source.

Abstract: A deodorization module and a storage device including the deodorization module. A deodorization module includes: a housing; a suction opening formed on the lower surface of the housing to allow external air to be suctioned therethrough; a fan disposed at the suction opening to suction the air; a discharge opening for discharging the air, which has been suctioned by the fan, to the outside of the housing; a photocatalytic bar disposed between the fan and the discharge opening; and a light source module, which includes a light source substrate and an ultraviolet light source and irradiates an ultraviolet ray to the photocatalytic bar.

Abstract: The present disclosure relates to a method of preparing an organic zinc catalyst through solid phase blending that does not require a solvent and a washing process, and a method of preparing a polyalkylene carbonate resin by using the organic zinc catalyst prepared thereby.

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: An air purification module comprises a housing having an interior space provided with an air inlet and an air outlet, and an axial type blowing fan, mounted in the housing, for moving air from the air inlet to the air outlet. The air purification module further includes an air purifying unit, provided on a flow path of the air, for purifying the air and a guide for reducing the flow rate of the air between the blowing fan and the air purifying unit. The air purifying unit includes a filter provided between the blowing fan and the air outlet and a light source unit for providing light to the filter.

Abstract: Charging system and method using a motor driving system are proposed. The charging system includes a battery, an inverter to which D.C. power stored in the battery is applied, including a plurality of legs each including two switching elements, a motor including a plurality of coils of which first ends are respectively connected to connection nodes of the switching elements of each of the plurality of legs, and second ends are connected to each other to form a neutral point, and an inverter driving part configured to control switching of the switching elements, so that switching speeds of the switching elements are different for each mode of a motor driving mode and a charging mode so as to change magnitude of charging voltage supplied to the neutral point of the motor and to output the charging voltage to the battery.

Abstract: An air purification module for purifying air includes a photocatalyst filter and a light source unit sequentially arranged in a selected direction. The light source unit is spaced apart from the photocatalyst filter to provide light to the photocatalyst filter and includes a substrate and a light source disposed on the substrate. The substrate includes at least one aperture to control a flow channel and a flow velocity of air so as to improve air purification effects through the photocatalyst filter when the air flows from the substrate towards the photocatalyst filter.

Abstract: A motor drive device includes: a first inverter including a plurality of first switching elements and connected to a plurality of coils; a second inverter including a plurality of second switching elements and connected to the plurality of coils; a plurality of transfer switching elements connected to the second ends; a capacitor disposed at one side of a casing of a motor; first and second cooling channels disposed at both sides of the capacitor; a plurality of first power modules including some of the plurality of first switching elements and some of the transfer switching elements; and a plurality of second power modules including some of the plurality of second switching elements.