Patent ID: 7414866
Filing Date: 2008-08-19
Classification: H02M

Abstract:
1. A method for smoothing input current to a power delivery system having regeneration capability, the method comprising: evaluating input current to an input converter of the power delivery system for a first fundamental cycle; shifting a window relative to a waveform of an input voltage after the first fundamental cycle; evaluating input current to the input converter for a second fundamental cycle; determining whether the input current of the second fundamental cycle is smoother than the input current of the first fundamental cycle; shifting the window in the same direction the window was shifted after the first fundamental cycle if the input current of the second fundamental cycle is smoother than the input current of the first fundamental cycle; and shifting the window in the opposite direction the window was shifted after the first fundamental cycle if the input current of the second fundamental cycle is not smoother than the input current of the first fundamental cycle.