System and method for power supply control

摘要

A resonant power supply is provided. The resonant power supply comprises a series resonant converter configured to convert an input DC voltage to an output DC voltage to generate an output DC voltage. The series resonant converter includes a switching stage, a resonant inductor, a resonant capacitor, and an isolation transformer. The resonant power supply further comprises a converter controller configured to obtain an actual trajectory radius signal based on a resonant inductor current, a resonant capacitor voltage, and a voltage in association with the isolation transformer. The converter controller is further configured to generate a trajectory radius command signal based on a DC voltage command signal and a DC voltage feedback signal, and to generate control signals to be applied to the switching stage based on the actual trajectory radius signal and the trajectory radius command signal.

主权项

1. A resonant power supply, comprising:
a series resonant converter configured to convert an input direct current (DC) voltage to generate an output DC voltage, the series resonant converter comprising:
a switching stage;a resonant inductor coupled to the switching stage;a resonant capacitor in series coupled to the resonant inductor; andan isolation transformer coupled to the resonant capacitor; and a converter controller coupled to the series resonant converter, wherein the converter controller is configured to:
obtain an actual trajectory radius signal based on a resonant inductor current measured at the resonant inductor, a resonant capacitor voltage measured at the resonant capacitor, and a voltage in association with the isolation transformer;generate a trajectory radius command signal based on a DC voltage command signal and a DC voltage feedback signal measured at the output of the series resonant converter; andgenerate control signals to be applied to the switching stage of the series resonant converter based on the actual trajectory radius signal and the trajectory radius command signal.