Abstract: A charging system and a charging method using a motor driving system are disclosed which may enable charging between vehicles each having a battery for providing power to a vehicle driving motor, such as electric vehicles or plug-in hybrid vehicles.

Abstract: A charging system and method using a motor driving system which can charge a vehicle battery using charging equipment providing various voltages using a motor driving system provided in a vehicle and improve charging efficiency by selectively determining a charging mode in response to an actual voltage state of the vehicle battery.

Abstract: A DC-to-DC converter includes a first capacitor, first, second, third, and fourth switches connected in series between first and second electrodes of the first capacitor, a second capacitor connected to a connection node of the first switch and the second switch and a connection node of the third switch and the fourth switch, an inductor connected to a connection node of the second switch and the third switch, and a controller that controls an on/off state of each of the first to fourth switches on the basis of a value obtained by applying a reciprocal of a detection current that is a measured current flowing through the inductor to a difference between a first detection voltage and a first voltage instruction value and a difference between a second detection voltage and a second voltage instruction value.

Abstract: A DC-to-DC converter includes a first capacitor, first to fourth switches connected in series between first and second electrodes of the first capacitor, a second capacitor connected to a connection node of the first switch and the second switch and a connection node of the third switch and the fourth switch, an inductor connected to a connection node of the second switch and the third switch, and a controller that performs PWM control. In a case where a failure occurs in the second capacitor, the DC-to-DC converter performs PWM control such that the first switch and the second switch enter the same state and the third switch and the fourth switch enter the same state on the basis of a result of comparison between a first detection voltage that is a measured output voltage and a target output voltage of the DC-to-DC converter.

Abstract: A flying DC-to-DC converter has a capacitor protection function of preventing a flying capacitor from overheating. The flying DC-to-DC converter estimates the temperature of a capacitor on the basis of a switching duty and an inductor current determined according to a result of comparison between an output voltage and a voltage instruction value, and determines whether to perform de-rating.

Abstract: An apparatus for controlling an inverter to drive a motor includes: a current control processor generating a voltage command for generating d/q axis current detection values, which are obtained by measuring current supplied to the motor, to follow a d/q axis current command for driving the motor, the current control processor converting the voltage command, which is sampled according to a sampling frequency generated based on a voltage vector phase of the voltage command, into a voltage vector corresponding to a point on each vertex and each side of a hexagon in a voltage vector diagram to apply a resulting value to the inverter driving the motor; and a sample frequency computing processor computing the sampling frequency based on the voltage vector phase of the voltage command and a reference number of sampling times during one rotation period of the motor.

Abstract: A fisheye lens assembly and an electronic apparatus are disclosed. The fisheye lens has an angle of view of 150° or more, includes a plurality of lenses including an aspherical lens having an inflection point on one surface or both surfaces thereof, and satisfies the expression 35 ?m?SAG_MAX, where SAG_MAX denotes a maximum value of absolute values of SAG values of inflection points of the aspherical lens.

Abstract: A method of forming a material layer includes providing a substrate into a reaction chamber, providing a source material onto a substrate, the source material being a precursor of a metal or semimetal having a ligand, providing an ether-based modifier on the substrate, purging an inside of the reaction chamber, and reacting a reaction material with the source material to form the material layer.

Abstract: An apparatus for diagnosing failure of a motor driving system using a resolver signal includes a resolver sensing a rotor position and a rotational frequency of a motor, a fast Fourier transform operation unit configured to perform fast Fourier transform on an output signal of the resolver to convert the output signal into frequency signals, a specific frequency band extraction unit configured to extract, from among the frequency signals, a specific frequency band including one or more frequencies selected from among a PWM switching frequency applied to an inverter, a motor's rotational frequency, and a preset resolver excitation signal frequency, and a failure diagnosing unit configured to diagnose failure by comparing a sum or a highest voltage among voltages corresponding to the frequencies included in the specific frequency band with a predetermined reference value.

Abstract: An apparatus for controlling an inverter driving a motor is provided. The apparatus includes a current controller that generates a voltage instruction for causing a current detection value, obtained by measuring a current provided from an inverter to a motor, to correspond to a current instruction for driving the motor. A voltage modulator generates a pulse width modulation signal for controlling on/off states of switching devices in the inverter at a predetermined switching frequency based on the voltage instruction. A frequency determiner determines the switching frequency based on driving information of the motor, determines a plurality of synchronization frequencies based on a speed of the motor, and randomly selects and determines one of the plurality of synchronization frequencies as the switching frequency.

Abstract: A system for increasing a temperature of a battery includes an inverter including a plurality of legs each including one pair of switching devices connected in series to each other between opposite ends of the battery and corresponding to a plurality of phases, respectively, a motor including a plurality of coils corresponding to the plurality of phases, respectively, where one end of each of the plurality of coils is connected to a connection node between one pair of switching devices included in a corresponding leg and other ends of the coils are connected to each other, and a controller configured to select two phases of the plurality of phases, and to alternately control an on/off state of switching devices included in two legs in the inverter, corresponding to the two selected phases, at a preset switching frequency to generate alternating current (AC) supplied to the battery.

Abstract: A charging system and a charging method using a motor driving system are disclosed which may enable charging between vehicles each having a battery for providing power to a vehicle driving motor, such as electric vehicles or plug-in hybrid vehicles.

Abstract: The present invention relates to a management system, a search method, and a browsing method of a unified data object using a tag object. A unified data object management system and method may efficiently access and manage the data object by storing and managing the unified data objects including a file, non-file data, or dynamic data on the basis of the tag object and then providing a search result based on the tag object when a search command is entered by a user.

Abstract: Provided are an optical lens assembly and an electronic apparatus including the same. The optical lens assembly includes a first lens group and a second lens group that are arranged from an object side to an image side, wherein the first lens group has positive refractive power and is fixed during focusing, and the second lens group moves along an optical axis for focusing.

Abstract: A charging system for a vehicle includes: a power transmitter transmitting power for charging a battery of a vehicle; a charger including a three-phase motor and inverter, and receiving the power from the power transmitter; an input voltage calculating processor selecting any one of a plurality of predetermined duty ratios and calculating a value of an input voltage supplied to the charger based on the selected duty ratio and a voltage value of the battery of the vehicle; an input current calculating processor calculating a value of an input current based on the calculated value of the input voltage and a value of the power transmitted by the power transmitter; a power transmission controller instructing the calculated input current to be input to the charger; and a charging controller instructing the battery of the vehicle to be charged.

Abstract: The present invention relates to a management system, a search method, and a browsing method of a unified data object using a tag object. A unified data object management system and method may efficiently access and manage the data object by storing and managing the unified data objects including a file, non-file data, or dynamic data on the basis of the tag object and then providing a search result based on the tag object when a search command is entered by a user.

Abstract: A charging power supplying system using a motor driving system includes an inverter that is connected to a battery, includes at least one switching device, and is configured to change an on/off state of the switching device and to convert power stored in the battery to output the converted power to an output terminal of the inverter, a motor including a plurality of coils that each receive power provided from the output terminal of the inverter, a charging power output terminal that is connected to a neutral point to which the plurality of coils of the motor is commonly connected and outputs current output from the neutral point to an external charging target, and a controller configured to control the switching device in the inverter based on current of the output terminal of the inverter.

Abstract: An apparatus for controlling an inverter driving a motor is provided. The apparatus includes a current controller that generates a voltage instruction for causing a current detection value, obtained by measuring a current provided from an inverter to a motor, to correspond to a current instruction for driving the motor. A voltage modulator generates a pulse width modulation signal for controlling on/off states of switching devices in the inverter at a predetermined switching frequency based on the voltage instruction. A frequency determiner determines the switching frequency based on driving information of the motor, determines a plurality of synchronization frequencies based on a speed of the motor, and randomly selects and determines one of the plurality of synchronization frequencies as the switching frequency.

Abstract: An apparatus for diagnosing failure of a motor driving system using a resolver signal includes a resolver sensing a rotor position and a rotational frequency of a motor, a fast Fourier transform operation unit configured to perform fast Fourier transform on an output signal of the resolver to convert the output signal into frequency signals, a specific frequency band extraction unit configured to extract, from among the frequency signals, a specific frequency band including one or more frequencies selected from among a PWM switching frequency applied to an inverter, a motor's rotational frequency, and a preset resolver excitation signal frequency, and a failure diagnosing unit configured to diagnose failure by comparing a sum or a highest voltage among voltages corresponding to the frequencies included in the specific frequency band with a predetermined reference value.

Abstract: An electronic device includes a power management circuit which supplies power from a battery to electronic components, a battery management circuit which controls connection between the battery and the power management circuit, a physical key formed on a part of the electronic device, a key control circuit which controls connection between the physical key and the battery management circuit, and a processor connected to the power management circuit. The processor is configured to transmit a signal for powering off the electronic device to the power management circuit, and when the electronic device is powered off, to control the key control circuit to connect the physical key with the battery management circuit. The power management circuit is configured to, when receiving the signal for powering off the electronic device, control the battery management circuit to disconnect the battery from the one or more electronic components included in the electronic device.