Patent ID: 10534029

Abstract:
A power conversion apparatus includes a primary-side circuit, a bulk capacitor, a conversion circuit, and a master control circuit. The primary-side circuit is adapted to rectify and boost an alternating-current power and output primary-side output. The bulk capacitor is connected in parallel to two output ends of the primary-side output. The conversion circuit is configured to receive the primary-side output passing through the bulk capacitor and convert the primary-side output into secondary-side output. The master control circuit detects an electric power state of the alternating-current power, obtains a time interval, a power of the secondary-side output corresponding to the time interval, and two of the capacitor voltages corresponding to the start and the end of the time interval when the electric power state is power-off, and selectively outputs an abnormal signal according to the time interval, the power, the capacitor voltages, and a threshold.