Power converter with duty ratio quantization

Details Power converter with duty ratio quantization Power converter with duty ratio quantization

1985-09-09

1986-12-16

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

323285, 323901, 318610, 364162, H02M 114, G05B 1142

Patent

active

046301879

ABSTRACT:
A discrete proportional-integral-differential controller, driven from a sampling digital error amplifier, is used to penetrate a quantized duty ratio control signal to provide dynamic output voltage regulation for switching dc-to-dc power converters. The sampling frequency of the digital PID controller is equal to the switching frequency of the power converter, so the digital controller may be used at different switching frequencies without recompensation. Digital techniques are also used to provide output current limiting, soft-start, undervoltage lockout, overvoltage shutdown, and power master-clear indications.

REFERENCES:
patent: 3741474 (1973-06-01), Kawada et al.
patent: 4390942 (1983-06-01), de Keizer
patent: 4541041 (1985-09-01), Park et al.
patent: 4549123 (1985-10-01), Hagglund et al.
N. R. Miller, A Digitally Controlled Switching Regulator, PESC Record, 1977, pp. 142-147.
V. B. Boros, A Digital Proportional Integral and Derivative Feedback Controller for Power Conditioning Equipment, PESC 1977 Record, pp. 135-141.
H. Matsuo & F. Kurokawa, Regulation Characteristics of the Digitally Controlled DC-DC Converter, 1983 IEEE, pp. 360-365.
T. V. Papathomas & J. N. Giacopelli, Digital Implementation and Simulation of an Average Current Controlled Switching Regulator, 1979 IEEE, pp. 155-161.
R. Bruckner, I. Khamare, Optimizing Converter Design and Performance Utilizing Micro Controller System Feedback and Control, Power Concepts, Inc. 1982, p. E-2, p. 1-E-2 p. 10.

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