6533b7ddfe1ef96bd1275523
RESEARCH PRODUCT
Digital power conversion system based on a sigma-delta modulator linear model
G.m. Di BlasiPatrizia LivreriGiuseppe CapponiFilippo Marinosubject
Forward converterEngineeringbusiness.industryDC-DC convertersTransistorDelta-sigma modulationSignalTransfer functionlaw.inventionPower (physics)digital controllerNonlinear systemlawElectronic engineeringDigital controlbusinessDigital control systemsdescription
This paper presents a new linear model for the sigma-delta (/spl Sigma//spl Delta/) modulator, based on modeling the nonlinear quantizer with a linear factor, and its input-to-output transfer function is given. The use of a 1-bit sigma-delta modulator in DC/DC power converter systems permits to implement a complete digital control. Results of an investigation from a prototype for a DC-DC converter are here reported. Using of a field programmable gate array allows implementing a simple variable control function. The modulator output produces a variable-frequency variable duty-ratio signal to control the switching power transistors.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-04-19 |