Power supply device for a household appliance and an operating method thereof

摘要

A household appliance power supply device and method are disclosed. The power supply device comprises a switching converter having an input filtering stage; and a determining means configured to obtain estimation data indicative of the input current that is adsorbed from the a main power input, on the base of the rate of change of the bus voltage across said bus capacitor respectively, during a second switching period. The switching converter further comprises a bus capacitor, electrically connected with at least one output terminal of a rectifying stage, a resonant tank, electrically connected with said bus capacitor, and a switching device electrically connected with said resonant tank, said switching device being operated with a switching cycle having a first switching period, and a second switching period.

主权项

1. A household appliance power supply device, comprising:
a switching converter; and a determining device, wherein, the switching converter comprises:
an input filtering stage, comprising at least one of a filtering inductor, and a rectifying stage, electrically connected with a main power supply, wherein the rectifying stage includes at least one rectifying stage output terminal;a bus capacitor, electrically connected with the at least one rectifying stage output terminal;a resonant tank electrically connected with at least one bus capacitor terminal; anda switching device configured for operation with a switching cycle, the switching device is electrically connected with said resonant tank, wherein the switching cycle comprises a first switching period, in which said switching device allows a flow of a first current between said bus capacitor and said resonant tank, and a second switching period, in which said switching device blocks the flow of said first current; andwherein the determining device is configured to obtain estimation data indicative of an input current that is adsorbed from the main power supply by said power supply device, said estimation determined based on the rate of change of a bus voltage across the at least one bus capacitor terminals during said second switching period.