Flux centering and power control for high frequency switching po

Details Flux centering and power control for high frequency switching po Flux centering and power control for high frequency switching po

1984-02-27

1986-04-22

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 56, H02M 3315

Patent

active

045846359

ABSTRACT:
A method and apparatus for controlling a power supply which includes a power transformer having primary and secondary windings and switching transistors for switching current through the windings. The apparatus includes circuitry for generating a composite signal representative of the flux and magnetizing current (I.sub.m) in the power transformer. The composite signal is correlated with a multiphase clocking signal to generate a pulsewidth modulated (PWM) signal which is used to drive the switching transistors.

REFERENCES:
patent: 4146832 (1979-03-01), McConnel
patent: 4150424 (1979-04-01), Nuechterlein
patent: 4315303 (1982-02-01), Snyder
patent: 4322817 (1982-03-01), Kuster
Redl, R., "Push-Pull Current-Fed Multiple-Output Wide-Input-Range DC/DC Power Converter", IEEE PESC Proc., 1981, pp. 204-212.
Patel, R., "Detecting Impending Core Saturation in Switched-Mode Power Converters", Unitrode Report, 1980.
Hirschberg, W. J., "New PWM Control Technique that Eliminates Transformer Unbalance", ACDC Electronics Div. Report, Powercon 6 Proc., 1979.
Wilson, R., "New Pulsewidth Modulation Method Inherently Maintains Output Transformer Flux Balance", Powercon 8 Proc., 1981, D-1, pp. 1-15.
Anderson et al., "Analysis of Static Characteristics and Dynamic Response of Push-Pull Switching Converters", IEEE PESC Proceeding, 1981, pp. 29-38.

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