Abstract: The present invention is directed to methods for forming an inverter circuit for operating a drive motor of an electric vehicle, which can more effectively reduce the switching noise generated by a power module during the operation of an inverter.

Abstract: A power module for an inverter which includes a base which has a plurality of slots are formed thereto, a plurality of building blocks inserted into the slots and power cables interconnecting the building blocks. Further, each of these building blocks is provided with a power element which corresponds to one phase. Thus, each building block in the power module may be replaced individually without having to replace the entire power module in case of a failure in a single power element of the power module.

Abstract: A system for recharging a plug-in hybrid vehicle and a control method are provided to recharge a battery with exterior AC electricity plugged in. The system includes a motor operated as an electric motor or a generator, a battery in which DC voltage is stored, an inverter disposed between the motor and the battery, a plugged in exterior AC electric power source supplying electrical energy, a single phase inductor disposed between the inverter and the AC electric power source, a switch which electrically connects or disconnects the motor, a current sensor that detects current value supplying to the motor, and a controller which controls the switch to disconnect electric connection between the inductor and the motor and controls the inverter not to supply current to the phase which is not connected to the inductor when the AC electric power source is plugged in.

Abstract: A system for recharging a hybrid vehicle is provided with two motors and supplies commercial electricity to neutral points of the motors when a connection of a recharging stand is detected, forms an electricity loop through the neutral points of the first motor and the second motor according to a phase of the commercial electricity, and carries out a recharging mode by detecting at least a voltage of a DC link capacitor in a voltage converter, a voltage of a smoothing capacitor, and a battery voltage. According to the system, a current control value or a voltage control value is selected according to the recharging mode in order to recharge a battery based on the current control value or the voltage control value.

Abstract: A system for recharging a battery in a hybrid vehicle provided with two motor is provided. If connection of a recharging connector (recharging stand) is detected, an initial activation of a controller is performed, and a DC link is pre-recharged. If the DC link is pre-recharged to a voltage higher than or equal to a predetermined voltage, an exterior AC or DC electricity is supplied to the battery so as to recharge the battery according to the present invention.

Abstract: The present invention provides a capacitor for an inverter of a vehicle comprising a case; a plurality of capacitor unit modules; positive and negative bus plates that are disposed in the case to be connected to the capacitor unit modules; and a power module corresponding to the unit modules, wherein that the unit modules are insulated from each other through an insulating material, and wherein the bus plates each comprise a bus bar that overlaps with the other bus bar and is electrically connected to the power module.

Abstract: The present invention provides a motor drive system for a hybrid vehicle and a method for controlling the same in the event of a failure in a voltage converter, in which high voltage stored in a DC-link capacitor is discharged to a 12V electrical load through a DC-DC converter, of which the output voltage is increased.

Abstract: The present invention is directed to methods for forming an inverter circuit for operating a drive motor of an electric vehicle, which can more effectively reduce the switching noise generated by a power module during the operation of an inverter.

Abstract: Provided is a wireless sensor network operating method considering energy efficiency. The method for operating a wireless sensor network including clusters of sensor nodes includes: selecting a cluster head based on residual energy amounts of the sensor nodes by increasing a probability that a sensor node with a greater amount of residual energy than the others is selected as a cluster head; transmitting an advertisement message from the selected cluster head to the sensor nodes to form a cluster; and transmitting sensing data acquired in each sensor node to the cluster head. Accordingly, this method can extend lifespan of sensor nodes by not transmitting/receiving data on residual energy amounts and positions between sensor nodes, and increase the entire lifespan of a wireless sensor network by reducing a probability that a sensor node having a relatively small residual energy amount is selected as a cluster head consuming much energy.

Abstract: The present invention provides an inverter circuit for a vehicle, which includes: a switching unit that includes a plurality of switching elements and switches a direct current into an alternating current; and a variable clamping unit that clamps an overshoot in case the overshoot is generated, and stops the operation of the switching unit in case a system voltage is greater than a clamping breakdown voltage. The circuit enables a voltage (DC input voltage) greater than a breakdown voltage of clamping unit to be used as a system voltage.

Abstract: Fast encoding method and system are provided which can transmit video data in real time using adaptive intra prediction in accordance with the H.264/AVC (Advanced Video Codec) standard so as to efficiently provide security-related images or multimedia images in various network environments with high quality. An intra prediction method of compressing and encoding an image includes the steps of: comparing an SAD value C calculated from macro block data of a present frame and a previous frame with a reference value K to determine a prediction method; and selectively performing on input macro block data a first method of determining a best mode and a block size by prediction in a plurality of prediction modes based on spatial directivity and generating prediction data and a second method of generating prediction data using the best mode and the block size used in the previous frame, depending on the determined prediction method.

Abstract: Provided is a wireless sensor network operating method considering energy efficiency. The method for operating a wireless sensor network including clusters of sensor nodes includes: selecting a cluster head based on residual energy amounts of the sensor nodes by increasing a probability that a sensor node with a greater amount of residual energy than the others is selected as a cluster head; transmitting an advertisement message from the selected cluster head to the sensor nodes to form a cluster; and transmitting sensing data acquired in each sensor node to the cluster head. Accordingly, this method can extend lifespan of sensor nodes by not transmitting/receiving data on residual energy amounts and positions between sensor nodes, and increase the entire lifespan of a wireless sensor network by reducing a probability that a sensor node having a relatively small residual energy amount is selected as a cluster head consuming much energy.

Abstract: A display apparatus having a display module to display images includes a first printed circuit board arranged on a rear side of the display module, a shielding cover to shield a rear side of the first printed circuit board to accommodate the first printed circuit board therein, a first connection port mounted on the first printed circuit board at an edge portion thereof and projected from a surface of the first printed circuit board, at least one second connection port mounted on the first printed circuit board adjacent to the first connection port and projected from the surface of the first printed circuit board by a second height different from the first height of the first connection port, a grounding bracket combined with the first printed circuit board and disposed over the first and second connection ports to be in contact with the first connection port, a second grounding plate arranged between the grounding bracket and the second connection port to be in contact with the grounding bracket and the seco

Abstract: A display apparatus having a display module to display images includes a first printed circuit board arranged on a rear side of the display module, a shielding cover to shield a rear side of the first printed circuit board to accommodate the first printed circuit board therein, a first connection port mounted on the first printed circuit board at an edge portion thereof and projected from a surface of the first printed circuit board, at least one second connection port mounted on the first printed circuit board adjacent to the first connection port and projected from the surface of the first printed circuit board by a second height different from the first height of the first connection port, a grounding bracket combined with the first printed circuit board and disposed over the first and second connection ports to be in contact with the first connection port, a second grounding plate arranged between the grounding bracket and the second connection port to be in contact with the grounding bracket and the seco

Abstract: In accordance with the present invention, a method of switching first and second parallel-connected insulated gate bipolar transistors (IGBTs) is as follows. Each of the first and second IGBTs are turned on in alternating cycles of a system clock such that in any given cycle of the system clock only one of the first and second IGBTs is turned on.

Abstract: In accordance with the present invention, a method of switching first and second parallel-connected insulated gate bipolar transistors (IGBTs) is as follows. Each of the first and second IGBTs are turned on in alternating cycles of a system clock such that in any given cycle of the system clock only one of the first and second IGBTs is turned on.

Abstract: A degaussing circuit is adapted to overcome a problem with limitations in the design of a printed circuit board under the safety regulations. The degaussing circuit is realized by making use of the horizontal deflection wave generated by a horizontal deflection circuit, and includes: a degaussing control section for detecting a horizontal frequency from the horizontal deflection wave received from the horizontal deflection circuit; and a degaussing coil for eliminating the earth magnetic field caused by a DC component from the horizontal frequency received from the degaussing control section.

Abstract: An apparatus for controlling the power management of a display monitor includes: a switching circuit provided in a power supply line between one output of a power supplying transformer and a heater of a color display tube for directly switching off the power supply line when the monitor enters the power-off mode. Also, a mode indicator may also be provided for indicating the power-off mode of the monitor. A microcomputer operates in response to the power-off mode to generate a high-level control signal supplied to the switching circuit and to the mode indicator. Also, a continuous pulse train signal having a predetermined on/off pulse duration is generated, representing the power-off mode. When both a high level control signal and the pulse train signal are supplied to the mode indicator, a power-off mode indicating operation using one LED is possible.