Output power supervisory circuit and control circuit for AC/DC converting circuit

• Main Authors: JIANG LIANGLIANG, QIAO HONGYUAN, DING JIAQING, YANG XIAOPENG, ZENG XIAO
• Format: Patent
• Language: Chinese; English
• Published: 06.04.2011
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention relates to an output power monitoring circuit and a power control circuit of an AC/DC conversion circuit; the monitoring circuit comprises a first multiplier, a second multiplier and a power comparator; wherein, the first multiplier calculates a reference power signal according to a feedback voltage signal and a preset output current signal; wherein, the feedback voltage is in direct proportion to the output voltage of the AC/DC conversion circuit; and the reference power is in direct proportion to the set output power of the AC/DC conversion circuit; the second multiplier calculates an actual power signal according to an input voltage signal and an input current signal; wherein, the actual power is in direct proportion to the actual output power of the AC/DC conversion circuit; the power comparator is connected with the first multiplier and the second multiplier and compares the actual power signal with the reference power signal, and outputs a power adjustment signal according to comparison re