Patent ID: 7110272
Filing Date: 2006-09-19
Classification: H02H,H02M

Abstract:
1. A method of controlling a three-phase inverter bridge having three branches, each branch providing one phase of a three-phase output for driving an inductive load, the inverter bridge having “L” bus voltage levels (L≧2), wherein one of the L levels is a most-negative bus voltage and one of the L levels is a most-positive bus voltage, each branch comprising two half-branches, a first one-half branch comprising transistor switches connected between the most-positive bus voltage and a respective phase output, and a second one-half branch comprising transistor switches connected between the most-negative bus voltage and the respective phase output, wherein within a half-branch, outer is defined as toward the most-positive or most-negative bus voltage, and inner is defined as toward the phase output, wherein for each branch, the method comprises: comparing a magnitude of an instantaneous output current (I in response to comparing I