Patent ID: 7339803
Filing Date: 2008-03-04
Classification: H02M

Abstract:
1. A three-phase multiple-level inverter bridge having three branches, each branch providing one phase of the three-phase output for driving an inductive load, the multiple-level inverter bridge having “L” bus voltage levels (L≧3), wherein two of the L levels are a most-negative bus voltage and a most-positive bus voltage, any intermediate bus voltage levels being differentiated from other bus voltage levels by a difference of the most-positive bus voltage and the most-negative bus voltage, divided by (L−1), each branch comprising two half-branches, a first one-half branch comprising (L−1) switches connected in series between the most-positive bus voltage and the phase output, and a second one-half branch comprising (L−1) switches connected in series between the most-negative bus voltage and the phase output, each half branch comprising: wherein: