Patent ID: 9590524
Date: 2017-03-07
CPC Classifications: G05F,H02M

Claim:
1. A power converter system configured to supply direct current (DC) power to a load, the power converter system comprising: a power converter device responsive to an alternating current (AC) input voltage and configured to provide an output DC voltage; an output voltage loop controller in operable communication with the power converter; an output current loop controller in operable communication with the power converter; an output power loop controller in operable communication with the power converter; a foldback controller in operable communication with the power converter; wherein the output voltage loop controller, the output current loop controller, the output power loop controller, and the foldback controller together control the power converter to provide a multi-sloped output characteristic, wherein the power converter provides: a substantially constant output voltage when in a voltage mode controlled by the voltage loop controller; an increasing output current while output voltage decreases, in a first constant power mode controlled by the power loop controller, wherein the output current is permitted to increase up to a first predetermined current limit point defined for the power converter; a decreasing output current and decreasing output voltage, in a foldback mode controlled by the foldback controller, the foldback mode occurring after the output current reaches the first predetermined current limit point; and an increasing output current and decreasing output voltage, in a second power mode controlled by the power loop controller, wherein the output current is permitted to increase so long as the output voltage remains below a first predetermined charge limit threshold.