Abstract: Systems and methods are described herein for providing power for enabling electroluminescence imaging of photovoltaic panels. The system may comprise a diode in a power converter, where the diode may restrict reverse current flow to the photovoltaic panel. The system may comprise a power device configured to be coupled to a photovoltaic panel. The power device may comprise an auxiliary power circuit which may provide power to the power device from the photovoltaic panel or form a power source connected to a power system controller. The power device may control a switch to provide a current path for reverse current to flow to the photovoltaic panel. An imager may capture an image of the panel.

Abstract: A switching circuit may comprise first and second switch legs and a coupled inductor. The controller may operate the first and second switch legs to control a current flowing through the coupled inductor such that zero voltage switching (ZVS) may be applied to the first and second switch legs. The system may determine a switching event time of a switch in the first switch leg, and determine a switching node voltage rise event time of the first switch leg based on a voltage measured at a switching node of the first switch leg. The controller may drive one or more switches using PWM signals. For example, the controller may drive one or more switches based on determining, for a switching instance, a phase difference between a first PWM signal and a second PWM signal for generating a ripple current for ZVS.

Abstract: A switching circuit may comprise first and second switch legs and a coupled inductor. The controller may operate the first and second switch legs to control a current flowing through the coupled inductor such that zero voltage switching (ZVS) may be applied to the first and second switch legs. The system may determine a switching event time of a switch in the first switch leg, and determine a switching node voltage rise event time of the first switch leg based on a voltage measured at a switching node of the first switch leg. The controller may drive one or more switches using PWM signals. For example, the controller may drive one or more switches based on determining, for a switching instance, a phase difference between a first PWM signal and a second PWM signal for generating a ripple current for ZVS.