Mixed mode regulation controller for a resonant power converter

Details Mixed mode regulation controller for a resonant power converter Mixed mode regulation controller for a resonant power converter

1989-12-29

1991-09-24

Stephan, Steven L.

Electric power conversion systems

Current conversion

With starting arrangement

363 97, H02M 7517

Patent

active

050518801

ABSTRACT:
Frequency variation in a resonant zero voltage switching (ZVS) power converter is combined with supplemental duty cycle modulation to obtain voltage regulation and to narrow the required frequency band needed for regulation of a given output load. These two regulation processes are applied simultaneously to the power switch control in order to accommodate a wider range of regulated load. Hence in the alternative, for a given load range a smaller frequency range is needed than would be the case if frequency variation alone is used.
The regulation control circuit includes both a duty cycle modulator and a frequency modulator each being responsive to an error signal responsive to a differential between an output voltage of the converter and a reference voltage. Each individual modulator has its own transfer function; one transfer function being kHz/volt the other transfer function being % duty cycle/volt. The regulation control circuit output is a rectangular pulse type signal that contains both elements of frequency modulation and duty cycle modulation.

REFERENCES:
patent: 3909695 (1975-09-01), Peck
patent: 4333135 (1982-06-01), Schwarz
patent: 4459651 (1984-07-01), Fenter
patent: 4525774 (1985-06-01), Kino et al.
patent: 4535399 (1985-08-01), Szepesi
patent: 4541041 (1985-09-01), Park et al.
patent: 4600823 (1986-07-01), Hiejima
patent: 4700285 (1987-10-01), Szepesi
patent: 4712170 (1987-12-01), Grace

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