Patent ID: 8723365

Claim:
A device for supplying power to a load requiring both a pre-determined supply of electrical power and high power for short durations of the operating cycle of the load, where the operating cycle is repeated, the power supply device comprising: a connection to an electrical grid; an AC voltage transformation circuit; a voltage rectification means; and a plurality of DC/DC converters mounted in series to terminals of said load, wherein said DC/DC converters are connected to said electrical grid via said AC voltage transformation circuit and said voltage rectification means wherein a first of said DC/DC converters is connected to the output of said voltage rectification means and a second of said DC/DC converters is connected to the output of said first DC/DC converter, and wherein each of said plural DC/DC converters has a storage capacitor mounted in parallel to it, and wherein said first DC/DC converter is supplied directly by said voltage rectification means, and wherein said second DC/DC converter is not supplied directly by said voltage rectification means, the storage capacitor mounted in parallel to said second DC/DC converter being adapted to exchange energy with said load.