Patent ID: 7042201
Filing Date: 2006-05-09
Classification: H02M

Abstract:
1. A method for convening DC power from a first voltage level on an input to a different voltage level on an output for delivery to a load, comprising the steps of: switching current from the input to the output through an inductive clement with a plurality of switches, each of the switches driven by a waveform to define the operation therein during a given PWM switching cycle, all of the waveforms referenced with a predetermined relationship to the given PWM duty cycle; measuring the voltage/current parameters on the input and output; determining with a control algorithm a change in the PWM duty cycle necessary to make a control move, the control algorithm utilizing as inputs the measured voltage/current parameters; modifying a pre-stored waveform pattern, which pre-stored waveform pattern contains all of the waveforms for driving the switches for a PWM switching cycle, the step of modifying operable to reflect the change in the operation of the switches during a PWM switching cycle required for the control move; and outputting the modified pattern to create the waveforms for defining the switching characteristics of the switches during a PWM switching cycle and drive the respective switches.