Patent ID: 9385628
Filing Date: 2016-07-05
CPC Classification: H02M

Claim Text:
1. A method comprising: detecting a voltage across a dc source coupled to an inverter, wherein the inverter comprises: in a first half cycle of a voltage at an output of the output filter, enabling the first three-level conductive path when a voltage at the first terminal of the dc source is greater than an instantaneous value of the voltage at the output of the output filter; in the first half cycle, enabling the first five-level conductive path when the instantaneous value of the voltage at the output of the output filter is greater than the voltage at the first terminal of the dc source; in a second half cycle of the voltage at the output of the output filter, enabling the second three-level conductive path when the instantaneous value of the voltage at the output of the output filter is greater than the voltage at the second terminal of the dc source; and in the second half cycle, enabling the second five-level conductive path when the voltage at the second terminal of the dc source is greater than the instantaneous value of the voltage at the output of the output filter.