Patent ID: 8929111
Filing Date: 2015-01-06
Classification: H02M

Abstract:
1. A method of generating pulse-width modulated (PWM) command signals for a plurality of switches employed in a converter to selectively conduct electricity between a plurality of alternating current (AC) terminals and at least three direct current (DC) terminals, the method comprising: receiving the plurality of voltage commands; selecting a triangular region based on the received voltage commands, wherein the selected triangular region is defined by at least three switching states; selecting an origin switching state from the switching states defining the selected triangular region; incrementing the switching states from the selected origin switching state during a first half of the switching period; and decrementing the switching states during a second half of the switching period until the origin switching state is reached, wherein the switching states utilized during the switching period dictate the PWM command signals provided to the plurality of switches employed in the three-level converter.