BI-DIRECTIONAL AC OR DC VOLTAGE REGULATOR

摘要

The invention provides a bi-directional AC or DC voltage regulator having a controller, an input circuit and an output circuit, the input and output circuits being capacitively coupled one to the other and being symmetrical one relative to the other, wherein each circuit comprises two terminals (AC1, AC2; AC3, AC4) across which are connected a capacitor (C2a; C2b) and, in parallel with the capacitor (C2a; C2b), a series connection of an inductor (L1; L2) and a switching network (S1; S2) controlled by the controller. Each switching network (S1; S2) has two branches in anti-parallel, of which each branch permits only uni-directional current flow and comprises a switching means. Since both branches of each switching network comprise switching means, then the device may be constructed as an AC or DC regulator/transformer which retains the capacity to permit bi-directional power flow.