Patent ID: 11945057
Assignee: ILLINOIS TOOL WORKS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A welding-type power system, comprising:
a power supply;
an energy storage device;
a power bus connected to a power output of the power supply and to a welding-type output;
a sensor configured to detect a power load characteristic on the power bus;
a bi-directional 3-level converter connected to the power bus and the energy storage device, the bi-directional 3-level converter arranged between the energy storage device and the power bus, the bi-directional 3-level converter comprising a plurality of switches; and
a controller configured to:
adjust an output duty cycle of the bi-directional 3-level converter to control a magnitude and direction of a current as measured through the energy storage device,
convert power from the power bus to recharge the energy storage device, and
convert power from the energy storage device to provide power to the power bus, at a certain power conversion rate, in order to maintain the power load characteristic on the power bus at a predetermined value.