2. Three-phase current switch

2.1 Basic three-phase structure

• The desired structure is that of a direct AC-DC converter with :

  • the input (respectively output) is connected to a three-phase, perfect sinusoidal AC voltage source, reversible in voltage and current;

  • the output (respectively the input) is connected to a unidirectional source of direct current I _c perfect, voltage-reversible.

  Both sources are assumed to be active and reversible in power.

  The three-phase voltage source can be represented by a star or delta grouping of three bipolar voltage sources ( v _a1 ...