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

A method for operating a household appliance power supply device, comprising:

• configuring a household appliance power supply device with a switching converter, wherein the switching converter includes an input filtering stage configured with at least one filtering inductor, and a rectifying stage;
• connecting a main power input, electrically, to the rectifying stage;
• connecting a bus capacitor, electrically, to at least one output terminal configured at least one of on an outside surface or within said rectifying stage;
• connecting a resonant tank, electrically, to at least one terminal configured at least one of on an outside surface or within said bus capacitor;
• connecting a switching device, electrically, to said resonant tank;
• operating said switching device with a switching cycle, wherein the switching cycle comprises a first switching period, and a second switching period;
• configuring the first switching period to allow a flow of a first current between said bus capacitor and said resonant tank;
• configuring the second switching period to block the flow of said first current;
• and
• obtaining an estimation data obtained based on the rate of change of a bus voltage across a rectifying stage terminal on the rectifying stage and the at least one terminal configured on the outside surface or within the bus capacitor during said second switching period, wherein the estimation data is indicative of an input current that is adsorbed from the main power input by said household appliance power supply device.

A household appliance power supply device, comprising:

• a switching converter;
• and
• a determining device,
• wherein, the switching converter includes an input filtering stage electrically connected with a main power supply, a bus capacitor, a resonant tank electrically connected with at least one bus capacitor terminal;
• and a 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;
• and
• wherein 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, based on the rate of change of a bus voltage measured across the at least one bus capacitor terminal during said second switching period.