Method for controlling switching arm switches, in particular for loading accumulation resources, and the corresponding loading device

The method involves controlling switches (12) of switching arms (A, B) by transmission of pulse width modulation control signals. Alternating voltage (Vx) is generated in an opposition phase relative to voltage at compensation inductance terminals (7') connected to one switching arm (B) and a neutral (N) of an external electrical network, so that voltage between the neutral of the external electrical network and ground is direct voltage. The switching arm is controlled in an open loop mode. An independent claim is also included for an electrical device for charging an accumulation unit via an external electrical network.