Patent ID: 6963497
Filing Date: 2005-11-08
Classification: H02M

Abstract:
1. A power converter for converting an input voltage from a power source to an output voltage from the power converter, the power source having an input and a return, comprising an inductor having a first terminal and a second terminal, the first terminal of the inductor being connected to the input of the power source, a first capacitor having a first terminal and a second terminal, the first terminal of the first capacitor being connected to the second terminal of the inductor a rectifier means having a first terminal and a second terminal, the first terminal being connected to the second terminal of the first capacitor, a second capacitor having a first terminal and a second terminal, the first terminal of the second capacitor being connected to the second terminal of the rectifying means, and the second terminal of the second capacitor being connected to the return of the power source, a first switching means having a first terminal and a second terminal, the first terminal of the first switching means being connected to the first terminal of the first capacitor and the second terminal of the first switching means being connected to the first terminal of the second capacitor, a second switching means having a first terminal and a second terminal, the first terminal of the second switching means being connected to the second terminal of the first capacitor and the second terminal of the second switching means being connected to the second terminal of the second capacitor, the first switching means and the second switching means being operated synchronously for pulse width modulation such that the first switching means and the second switching means are closed for a proportion of time D and the first switching means and the second switching means are open for a proportion of time 1−D where D is a number having a value from zero to one to control the output voltage of the power converter, whereby the voltage from the first terminal of the first capacitor to the second terminal of the first capacitor equals the voltage from the first terminal of the second capacitor to the second terminal of the second capacitor, the voltage from the first terminal of the first capacitor to the second terminal of the first capacitor and the voltage from the first terminal of the second capacitor to the second terminal of the second capacitor being the output voltage of the power converter, and whereby the ratio of the output voltage of the power converter to the input voltage of the power source is equal to one divided by the difference of two and D.