Resonant inverter employing frequency and phase modulation using

Details Resonant inverter employing frequency and phase modulation using Resonant inverter employing frequency and phase modulation using

1989-07-13

1990-08-21

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

363 98, H02M 3337

Patent

active

049511858

ABSTRACT:
A series resonant inverter is controlled to provide a substantially constant output voltage to a load. The control utilizes a combination of optimal control methods and phase modulation to enable time optimal responses to changes in state of the system. State determinants (including resonant capacitor voltage, resonant inductor current, source voltage, and output load voltage) are continuously monitored, and an optimal control signal is generated therefrom. When operating within the operable frequency range of the inverter's controllable switch means, frequency is varied to maintain proper operation. When operating at an extremity of the operable frequency range, phase modulation is employed.

REFERENCES:
patent: 4477868 (1984-10-01), Steigerwald
patent: 4541041 (1985-09-01), Park et al.
patent: 4670832 (1987-06-01), Park
patent: 4672528 (1987-06-01), Park et al.
Oruganti, Ramesh and Lee, Fred C., "Resonant Power Processors: Part I-State Plane Analysis", 1984 Industry Applications Society Proceedings, pp. 860-867.
Oruganti, Ramesh and Lee, Fred C., "Resonant Power Processors: Part II-Methods of Control", 1984 Industry Applications Society Proceedings, pp. 868-878.
Oruganti et al., "Implementation of Optimal Trajectory Control of Series Resonant Converter", 1987 Power Electronics Specialty Conference Proceedings, pp. 451-459.

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