Patent ID: 8222772
Filing Date: 2012-07-17
Classification: H02M,Y02B

Abstract:
1. Apparatus comprising: an unipolar input for receiving a pulsating unipolar input voltage characterized by a series of unipolar pulses, the pulses being characterized by a pulse waveform, a pulse duration, and a characteristic frequency, a first DC-DC switching power converter for converting power received from the unipolar input for delivery to a first load via a first output at a first DC output voltage, the first DC-DC switching power converter comprising one or more switches, and a controller for operating the one or more switches in a series of converter operating cycles, to control the first DC output voltage to be substantially equal to a pre-determined value over a range of power levels delivered by the converter, wherein the converter operating cycles comprise a duration defining a converter operating period, wherein the converter operating period is 1% or less of the pulse duration, wherein the first power converter is adapted to convert power via the first output for delivery to the first load during an operating interval, the operating interval comprising a selected portion of the pulse duration, and to refrain from converting power via the first output for delivery to the first load during the remainder of the pulse duration; and to vary the duration of the operating interval as a function of the magnitude of the power converted by the first DC-DC switching power converter.