Abstract:
본 발명은 고전압원과 저전압원 사이에 전기적으로 연결되어 양자 사이의 에너지 전달을 수행하는 양방향 DC/DC 컨버터의 암-쇼트 방지 및 감지방법에 관한 것으로, 양방향 DC/DC 컨버터의 출력전류를 모니터링하는 모니터링 단계; 상기 모니터링된 출력전류가 양의 전류인지를 판단하는 제1판단단계; 상기 출력전류가 양의 전류인 것으로 판단되면, 부스트 스위칭 소자에 오프 게이팅 신호를 유지하고 벅 스위칭 소자에 턴-온 게이팅 신호를 인가하는 단계; 양방향 DC/DC 컨버터의 출력전류가 양의 방향으로 증가하는지를 판단하는 제2판단단계; 및 상기 양방향 DC/DC 컨버터의 출력전류가 양의 방향으로 증가하지 아니하는 것으로 판단되면, 부스트 스위칭 소자 또는 벅 다이오드 중 어느 하나 이상이 단락된 것으로 판정하는 단계 를 포함하는 것을 특징으로 한다.
Abstract:
PURPOSE: A power limited control system and a method thereof are provided to prevent faults and failures and lengthen the lifespan of the battery, by limiting and controlling the power available for a motor in case where a vehicle is operated in an electric vehicle mode. CONSTITUTION: A power limited control system comprises a motor control unit(A4) for controlling driving speed and torque of a motor(A5) in accordance with a transmission, load, and battery state of charge; a first switching unit having an internal contact switched in accordance with the control signal output from an upper controller so as to determine connection of voltage output from a fuel cell(A1); a second switching unit having an internal contact switched in accordance with the control signal of an upper controller so as to determine connection of the motor control unit and fuel cell or a battery(A8); a DC converting unit(A6) for controlling charging/discharging of the battery by controlling the output voltage of the fuel cell and the regenerative voltage generated during braking; a third switching unit switched by the control signal of an upper controller so as to determine connection of voltage between the battery and the DC converting unit; and a power distribution control unit(A9) for monitoring controllers of each unit through a control area network communication, and distributing power of the fuel cell and the battery, supplied to the motor.
Abstract:
PURPOSE: A battery charging apparatus for an electric motor vehicle is provided to simplify configuration of a battery charging apparatus by reducing the number of passive elements and switching elements, while reducing costs and allowing battery charging apparatus to be easily mounted to the motor vehicle. CONSTITUTION: A battery charging apparatus comprises an AC power input unit(220) for transmitting AC power to an AC input filter unit(230), and sensing the phase and amplitude of voltage and transmitting the result of sensing to a control unit(300); the AC input filter unit for receiving AC power from the AC power input unit, filtering high frequency noises generated from the charging apparatus during switching, and outputting the result; a tap transformer(240) for receiving the signal output from the AC input filter unit, transforming voltage and outputting voltages in accordance with the tap converting signal output from the control unit; a full-wave rectifier unit(250) for receiving the signal output from the tap transformer, converting the received signal into DC and outputting the result; a smoothing unit(260) for receiving high voltage side signal output from the full-wave rectifier unit, smoothing the received signal and outputting the result; a current sensing unit(270) for receiving low voltage side signal output from the full-wave rectifier unit, sensing the current and transmitting the result of sensing to the control unit; a booster converter unit(280) for receiving high voltage side signal from the smoothing unit, receiving low voltage side signal from the current sensing unit, performing power factor improvement in accordance with the boost control signal output from the control unit, and outputting battery charging current; and the control unit for processing phase and amplitude input from the AC power input unit, and the current signal input from the current sensing unit, and outputting an amplitude restriction signal, tap converting signal and the boost control signal.
Abstract:
The present invention relates to a fail-safe improving method of a hybrid vehicle and, more specifically, to a fail-safe improving method of a hybrid vehicle, capable of improving fail-safe by providing a stable power source to a high voltage component, which functions normally, including a high voltage electronic oil pump when a high voltage main relay is off and malfunctioned. The present invention is to improve the fail-safe of the hybrid vehicle in which the high voltage electronic oil pump is adopted and provides the fail-safe improving method of the hybrid vehicle which is characterized by increasing voltages of a power source of a low voltage battery by operating a bidirectional converter in a boost mode if an engine can be started and the voltage of the low voltage battery is over a standard voltage when the high voltage main relay is off.
Abstract:
PURPOSE: A method for determining a charging state of a second battery for a hybrid vehicle is provided to reduce production costs and weight by removing a battery sensor. CONSTITUTION: An output current value of a low DC converter (LDC) is measured (S1). All consumption current values used in an electrical field load are measured (S2). When all consumption current values subtract from the output current value of the LDC, a charging current value of a second battery is determined (S3). The charging current value of the second battery is applied to a map table (S4). A charging state value of the second battery is determined (S5). [Reference numerals] (AA) Start; (BB) Adjust LDC output power; (CC) End; (S1) Measure LDC output current value (A1); (S2) Measure all consumption current values (A2) used in an electrical field load; (S3) Determine charging current value (A3) of second battery; (S4) Apply the charging current value (A3) of second battery to map table; (S5) Determine SOC value of second battery
Abstract:
PURPOSE: An AVN(Audio Video Navigation) system with a seamless broadcasting service function and a method thereof are provided to receive a DMB(Digital Multimedia Broadcasting) signal through a telematics service server when a normal DMB signal is not received due to a shadow region. CONSTITUTION: A vehicle speed collecting unit(20) collects speed of a vehicle. A storage unit(40) stores a DMB signal received from a broadcasting receiving unit. A control unit(50) reproduces the DMB signal if speed collected by the vehicle speed collecting unit is not faster than a threshold value. If the speed is faster than the threshold value, the control unit stores the DMB signal in the storage unit. If a user requests seamless watching, the control unit reproduces the DMB signal stored in the storage unit.