Patent ID: 9544948
Date: 2017-01-10
CPC Classifications: H05B

Claim:
1. A household appliance power supply device comprising: a switching converter that comprises a rectifying stage, electrically connected with a main power supply; a bus capacitor electrically connected in parallel with at least one output terminal electrically connected with the rectifying stage; a first resonant tank and second resonant tank electrically connected with at least a terminal of the bus capacitor; a first switching device and a second switching device, which have respectively a first switching period and a second switching period and are electrically connected respectively with the first resonant tank and the second resonant tank; and a control means configured to control the first switching device and the second switching device; wherein the control means is configured to operate the first switching device independently from an operating condition of the second switching device, so that at least one first electric quantity related to the operation of the first switching device follows at least one corresponding reference first waveform and a first reference value; and wherein the control means is configured to operate the second switching device depending on an operating condition of the first switching device and based in part on a desired power output of the power supply device, so that the first switching device and the second switching device work according to an interleaved mode, the second switching period is kept constantly equal to the first switching period, and a delay between initiating operation of the first switching device and initiating operation of the second switching device is based in part on the desired power output of the power supply device.