Abstract: A power converter includes a full-bridge switching circuit, a resonant circuit, a transformer, an over-voltage protection unit, a PWM control unit, a trigging control unit, and a driving unit. The over-voltage protection unit detects an output voltage of the power converter to produce an output voltage signal. The PWM control unit produces PWM signals. The trigging control unit receives the output voltage signal and the PWM signals to produce a trigging control signal. When an over-voltage output is detected by the over-voltage protection unit, the trigging control unit outputs the low-level trigging control signal to disable the driving unit at the end of duty cycle of the PWM signals.

Abstract: A charging apparatus with alternating current- and direct current-charging functions for a mobile vehicle is disclosed. The charging apparatus receives an external direct current (DC) power source or an external alternating current (AC) power source and converts the DC power source or the AC power source into the required voltage and current for charging a rechargeable battery installed in the charging apparatus. The charging apparatus mainly includes a DC/DC conversion unit, an integrated DC/DC conversion and PFC unit, and a control unit. The control unit detects that the external power source is the DC power source or the AC power source. Furthermore, the charging apparatus controls the DC/DC conversion unit and the integrated DC/DC conversion and PFC unit according the type of the detected external power source, thus providing the required DC voltage level and charging current to the rechargeable battery.

Abstract: A charging apparatus of a mobile vehicle is provided to receive and convert an external alternating current (AC) power source into a direct current (DC) power source for charging a rechargeable battery of the mobile vehicle. The charging apparatus of the mobile vehicle includes a charging apparatus and the rechargeable battery. The charging apparatus is installed in the mobile vehicle. The charging apparatus includes an electromagnetic interference (EMI) filter and a power factor corrector (PFC). The EMI filter is provided to eliminate the noise in the AC power source to prevent the conductive electromagnetic interference. The PFC is provided to convert the filtered AC power source into the DC power source and improve the power factor of the converted DC power source. Therefore, the charging apparatus of the mobile vehicle provides power conversion and directly charges the rechargeable battery, thus reducing conversion losses and increasing charging efficiency.

Abstract: A charging apparatus with alternating current- and direct current-charging functions for a mobile vehicle is disclosed. The charging apparatus receives an external direct current (DC) power source or an external alternating current (AC) power source and converts the DC power source or the AC power source into the required voltage and current for charging a rechargeable battery installed in the charging apparatus. The charging apparatus mainly includes a DC/DC conversion unit, an integrated DC/DC conversion and PFC unit, and a control unit. The control unit detects that the external power source is the DC power source or the AC power source. Furthermore, the charging apparatus controls the DC/DC conversion unit and the integrated DC/DC conversion and PFC unit according the type of the detected external power source, thus providing the required DC voltage level and charging current to the rechargeable battery.

Abstract: A charging system of a mobile vehicle and a method for operating the same are provided to receive and convert an external AC source into a DC source for charging the mobile vehicle. First, a high DC voltage is outputted through a charging apparatus. Afterward, the high DC voltage is received and converted by a DC power conversion apparatus in the mobile vehicle, thus the required voltage level of the high DC voltage is provided for a rechargeable battery. Finally, the DC power conversion apparatus is controlled through a vehicle controller to provide the desired charging current for the rechargeable battery. The DC power conversion apparatus is installed in the mobile vehicle so that the rechargeable battery is protected by the DC power conversion apparatus. In addition, an adaptive charging manner is provided according to operating conditions of the rechargeable battery, thus increasing charging reliability, security, and speed.

Abstract: The proposed boost circuit includes a DC/DC converter having a switch, receiving an input voltage and outputting an input voltage feedback signal, an output voltage feedback signal, an input current feedback signal and an output voltage after a boost of the input voltage, and a feedback control circuit having a pulse-width modulation limiting controller, coupled to the converter, receiving the input voltage feedback signal, the output voltage feedback signal and the input current feedback signal and generating an output signal with a fixed time period. The output signal is employed to control the switching of the switch so as to generate the boost.

Abstract: The proposed boost circuit includes a DC/DC converter having a switch, receiving an input voltage and outputting an input voltage feedback signal, an output voltage feedback signal, an input current feedback signal and an output voltage after a boost of the input voltage, and a feedback control circuit having a pulse-width modulation limiting controller, coupled to the converter, receiving the input voltage feedback signal, the output voltage feedback signal and the input current feedback signal and generating an output signal with a fixed time period. The output signal is employed to control the switching of the switch so as to generate the boost.

Abstract: A backup power-supply device is provided. The backup power-supply device can supply a DC power to an electric appliance when an external power source electrically connected to the electric appliance is interrupted. The backup power-supply device can sustain supplying the DC power for at least three to five minutes so that the operation of the electric appliance will not be interrupted during the power outage.