Patent ID: 11949343
Assignee: INERTECH IP LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. An energy storage system comprising:
an energy storage device;
a DC-DC converter coupled to the energy storage device;
a multi-level inverter coupled to the DC-DC converter, the multi-level inverter including at least two levels; and
a controller for the multi-level inverter, the controller comprising:
a processor and a memory configured to:
receive a reference voltage vector and an angle;
identify a sector among sectors of the multi-level inverter and a region among regions of the multi-level inverter based on the reference voltage vector and the angle, yielding an identified sector and an identified region; and
select a switching sequence and turn-on time values based on the identified sector and the identified region; and

a circuit configured to generate pulse width modulation (PWM) switching signals for the regions of the multi-level inverter and the sectors of the multi-level inverter based on the turn-on time values and the switching sequence,
wherein each of the regions includes a same number of the sectors.