Patent ID: 7286375
Filing Date: 2007-10-23
Classification: H02M

Abstract:
1. A method to compensate for dead-time in an inverter including a first switch and a second switch and a node disposed between the first switch and the second switch, the method comprising the steps of: (a) inserting a dead-time period prior to actuating ON the first switch and the second switch; (b) pre-determining an amount of output in volt•seconds for the inverter; (c) determining an input signal including a pulse width for the inverter, wherein the output is based on the pulse width, and the pulse width is based on: a first carrier signal including a first pulse sequence, a second carrier signal including a second pulse sequence, wherein the first pulse sequence and the second pulse sequence are each one of a non-inverted pulse sequence and an inverted pulse sequence, and a polarity of current at the node, wherein the polarity is one of positive and negative; (d) adding a first amount of pulse width to the input signal when the current polarity is positive; (e) subtracting a second amount of pulse width from the input signal when the current polarity is negative; and (f) determining if a second amount of pulse width needs to be one of added to and subtracted from the input signal.