Abstract: A gateway includes a modulation scheme conversion device, which includes a backscattering tag and a tag signal generation unit configured to provide a tag signal to the backscattering tag. The modulation scheme conversion device multiplies a radio signal, which has been modulated with a first modulation scheme, and the tag signal to produce a multiplied signal and to reshape the multiplied signal using a second modulation scheme to produce a reshaped signal and backscatters the reshaped signal. The signal, which is reshaped with the second modulation scheme and backscattered, is provided to a receiver of second modulation scheme signals and then provided to the Internet.

Abstract: A modulation scheme conversion device includes: a backscattering tag to which a tag signal is provided; and a tag signal forming unit for forming a tag signal. The modulation scheme conversion device multiplies a radio signal, which has been modulated in a first modulation scheme, and a tag signal, and reconfigures the multiplied signal by using a second modulation scheme, so as to backscatter the reconfigured signal, wherein the reconfiguration is performed in a physical (PHY) layer.

Abstract: A wireless device driving method includes hiding a header emulated with a second protocol in a payload of a packet defined with a first protocol and transmitting the emulated header at a transmission side, receiving the emulated header and an ambient signal at a reception side, and decoding the ambient signal according to the second protocol to obtain a bit sequence.

Abstract: A modulation scheme conversion device includes: a backscattering tag to which a tag signal is provided; and a tag signal forming unit for forming a tag signal. The modulation scheme conversion device multiplies a radio signal, which has been modulated in a first modulation scheme, and a tag signal, and reconfigures the multiplied signal by using a second modulation scheme, so as to backscatter the reconfigured signal, wherein the reconfiguration is performed in a physical (PHY) layer.

Abstract: A wireless device driving method includes hiding a header emulated with a second protocol in a payload of a packet defined with a first protocol and transmitting the emulated header at a transmission side, receiving the emulated header and an ambient signal at a reception side, and decoding the ambient signal according to the second protocol to obtain a bit sequence.

Abstract: A charging apparatus for an electric vehicle is provided. The apparatus includes an AC power input terminal receiving one AC input power from among single-phase AC power and multi-phase AC power. A power factor corrector having full bridge circuits receives the AC input power through the AC power input terminal. A link capacitor is charged through the power factor corrector. A first switch connects any one of an AC power input line and a neutral line of the AC power input terminal to the power factor corrector and a second switch selectively connects the AC power input terminal to the power factor corrector, or the link capacitor. The power factor corrector and the switch network operate based on a condition of received AC input power. The second switch includes a third switch and a fourth switch that connect each full bridge circuit to a positive battery electrode.

Abstract: An inverter system for a vehicle includes: an energy storage device configured to store electrical energy, a first inverter including a plurality of first switching elements and configured to convert the electrical energy stored in the energy storage device into alternating-current (AC) electric power, a second inverter including a plurality of second switching elements different from the plurality of first switching elements, a motor configured to be driven by receiving the AC power converted by the first inverter and the second inverter, current sensors disposed between the first inverter and the motor and the second inverters and the motor, respectively, and configured to detect a current input to the motor, and a controller configured to generate a pulse width modulation (PWM) signal for controlling driving of the motor.

Abstract: The present invention relates to a decoding method of a software modem in a limited memory environment using overlapping fragmentation and progressive decoding, which processes packets in real-time and reduces power consumption in an environment in which memory is limited when the software modem is used, and the decoding method includes: (a) receiving a data packet from the signal processing device, by the software modem; (b) fragmenting the data packet, decoding the fragments by the fragment, and transferring a decoded MAC header to the MAC module, by the software modem; (c) analyzing the MAC header and verifying whether the packet is a data packet transmitted to the MAC module itself or the packet is damaged, by the MAC module; (d) directing, when the data packet is verified, the software modem to perform additional decoding on the data packet, by the MAC module; and (e) directing, when the data packet is not verified, the software modem to drop the data packet, by the MAC module.

Abstract: An inverter system for vehicles according to the present disclosure may include: an energy storage storing electrical energy; a first inverter which includes a plurality of first switches and converts the energy stored in the energy storage into AC power; a second inverter which includes a plurality of second switches, which are different from the first switches, is connected in parallel with the first inverter to the energy storage and converts the energy stored in the energy storage into AC power; a motor driven by receiving the AC power converted through the first inverter and the second inverter; and a controller for controlling operations of the first inverter and the second inverter based on power requirements of the motor.

Abstract: An inverter system for a vehicle may include an energy storage device configured to store electrical energy; a first inverter including a plurality of first switching elements, and converting the energy into AC power; a second inverter including a plurality of second switching elements different from the first switching elements, being connected to the energy storage device in parallel with the first inverter, and converting the energy into AC power; a motor driven by receiving the AC power; a PWM signal generating device configured to generate a reference Pulse-width modulation (PWM) signal for controlling driving of the motor; and a PWM signal converting device configured to convert the reference PWM signal into both a first PWM signal input into the first inverter to drive the first switching elements, and a second PWM signal input into the second inverter to drive the second switching elements.

Abstract: An inverter system for a vehicle includes: an energy storage device configured to store electrical energy, a first inverter including a plurality of first switching elements and configured to convert the electrical energy stored in the energy storage device into alternating-current (AC) electric power, a second inverter including a plurality of second switching elements different from the plurality of first switching elements, a motor configured to be driven by receiving the AC power converted by the first inverter and the second inverter, current sensors disposed between the first inverter and the motor and the second inverters and the motor, respectively, and configured to detect a current input to the motor, and a controller configured to generate a pulse width modulation (PWM) signal for controlling driving of the motor.

Abstract: A wireless power transfer (WPT) method for an electric vehicle (EV) may include a vehicle controller or a vehicle assembly (VA) controller connected to the vehicle controller performing communications, for charging of a battery of the EV, with a ground assembly (GA) controller of a charger connected to a primary coil or a primary pad located outside the EV; and connecting the battery to a field winding of a driving motor of the EV before starting the WPT. The battery is charged by a power magnetically induced at the field winding from the primary coil.

Abstract: An inverter system for a vehicle may include an energy storage device configured to store electrical energy; a first inverter including a plurality of first switching elements, and converting the energy into AC power; a second inverter including a plurality of second switching elements different from the first switching elements, being connected to the energy storage device in parallel with the first inverter, and converting the energy into AC power; a motor driven by receiving the AC power; a PWM signal generating device configured to generate a reference Pulse-width modulation (PWM) signal for controlling driving of the motor; and a PWM signal converting device configured to convert the reference PWM signal into both a first PWM signal input into the first inverter to drive the first switching elements, and a second PWM signal input into the second inverter to drive the second switching elements.

Abstract: An inverter system for vehicles according to the present disclosure may include: an energy storage storing electrical energy; a first inverter which includes a plurality of first switches and converts the energy stored in the energy storage into AC power; a second inverter which includes a plurality of second switches, which are different from the first switches, is connected in parallel with the first inverter to the energy storage and converts the energy stored in the energy storage into AC power; a motor driven by receiving the AC power converted through the first inverter and the second inverter; and a controller for controlling operations of the first inverter and the second inverter based on power requirements of the motor.

Abstract: A charging apparatus for an electric vehicle is provided. The apparatus includes an AC power input terminal receiving one AC input power from among single-phase AC power and multi-phase AC power. A power factor corrector having full bridge circuits receives the AC input power through the AC power input terminal. A link capacitor is charged through the power factor corrector. A first switch connects any one of an AC power input line and a neutral line of the AC power input terminal to the power factor corrector and a second switch selectively connects the AC power input terminal to the power factor corrector, or the link capacitor. The power factor corrector and the switch network operate based on a condition of received AC input power. The second switch includes a third switch and a fourth switch that connect each full bridge circuit to a positive battery electrode.

Abstract: A system and a method of controlling charge of a vehicle battery are provided. In particular, when a voltage of the vehicle battery is different from an output voltage of a commercially available quick charger, a compatibility problem is solved through a converter, thereby allowing an inverter, an electric motor, and a connector to have an increased efficiency and to maximize a reduction in size, weight, and material cost thereof.

Abstract: An electric vehicle includes: a battery configured to be charged with a first voltage; and a converter configured to boost, when power of a second voltage that is lower than the first voltage is received, the power of the second voltage to the first voltage, and to transfer the first voltage to the battery, so that the battery is charged with power of the first voltage, wherein when the power of the first voltage is received, the power of the first voltage is transferred to the battery to charge the battery.

Abstract: An electric vehicle includes: a battery configured to be charged with a first voltage; and a converter configured to boost, when power of a second voltage that is lower than the first voltage is received, the power of the second voltage to the first voltage, and to transfer the first voltage to the battery, so that the battery is charged with power of the first voltage, wherein when the power of the first voltage is received, the power of the first voltage is transferred to the battery to charge the battery.

Abstract: A system and a method of controlling charge of a vehicle battery are provided. In particular, when a voltage of the vehicle battery is different from an output voltage of a commercially available quick charger, a compatibility problem is solved through a converter, thereby allowing an inverter, an electric motor, and a connector to have increased efficiency and to maximize a reduction in size, weight, and material cost thereof.

Abstract: A vehicle battery system and a method of controlling the same are provided. When voltage of the vehicle battery is different from an output voltage of a commercially available quick charger, two high-voltage batteries are connected in parallel during battery charging, and the two high-voltage batteries are connected in series during vehicle driving. Accordingly, a compatibility problem is resolved, thereby allowing an inverter, an electric motor, and a connector to have increased efficiency and to maximize a reduction in size, weight, and material cost thereof.