Patent ID: 7005840

Claim:
An interface ( 10 ) for supplying power to a load ( 14 ) from an electrical power supply network ( 12 ) comprising: a rectification stage ( 18 ) comprising an autotransformer ( 40 ) equipped with at least one primary winding ( 44 A, 44 B, 44 C) designed to be connected to the power supply network ( 12 ); and a power supply signal conditioning stage ( 20 ) having an output ( 28 ) supplying power to the load ( 14 ), which power supply signal conditioning stage ( 20 ) includes a power module ( 22 ) for conditioning the power supply signal connected at the output of the rectification stage ( 18 ) and a control module ( 24 ) designed to control the power module ( 22 ), wherein the autotransformer ( 40 ) includes at least one additional winding ( 62 A, 62 B, 62 C; 64 A, 64 B, 64 C) connected to the control module ( 24 ) to supply it with electrical power, the at least one additional winding ( 62 A, 62 B, 62 C; 64 A, 64 B, 64 C) being magnetically coupled to at least one primary winding ( 44 A, 44 B, 44 C) of the autotransformer ( 40 ).