PFC circuit and switching tube anomaly detection method thereof, storage medium and household electrical appliance

• Main Authors: ZHOU HONGMING, YAN XIAOJUN, LI JI, ZHANG JIENAN, FENG JUNPU, HUANG ZHENGHUI
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2024
• 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; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a PFC circuit and a switching tube anomaly detection method thereof, a storage medium and a household electrical appliance, the PFC circuit comprises N switching tubes which are connected in parallel and are conducted in a staggered manner, and the detection method comprises the following steps: controlling the ith switching tube and the (i + 1) th switching tube to be switched on or switched off according to a duty ratio, and obtaining a first feedback quantity of the PFC circuit; adjusting the duty ratio; controlling the ith switching tube and the (i + 1) th switching tube to be switched on or switched off according to the adjusted duty ratio, and obtaining a second feedback quantity of the PFC circuit; and performing anomaly detection on the ith switching tube and the (i + 1) th switching tube according to the first feedback quantity and the second feedback quantity. Therefore, online detection of the abnormal state of the switching tube in the PFC circuit is realized, and correspon