Fuzzy control process for switching power supplies, and device f

Details Fuzzy control process for switching power supplies, and device f Fuzzy control process for switching power supplies, and device f

1995-06-30

1997-12-09

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323286, 323287, 323290, 323222, G05F 140

Patent

active

056964390

ABSTRACT:
A process for the fuzzy control of switching power supplies which have at least one inductor and at least one switching device, and a device for performing this control, the particularity whereof resides in the fact that it comprises the following steps: measuring the value of the current on the inductor; measuring the value of the input voltage of the switching power supply; measuring an error generated between a reference voltage and an output voltage of the power supply; defining fuzzy membership functions for the value of the current on the inductor, for the input voltage value, and for the error; defining an output membership function for the value of the duty cycle of the power supply; defining multiple fuzzy inference rules to which the measured values and the membership functions are applied calculating the corresponding weight functions of the membership functions; defuzzifying the results obtained by means of the weight function calculation and the application of fuzzy rules so as to obtain a real value of the duty cycle which is suitable to drive the switching device.

REFERENCES:
patent: 4940929 (1990-07-01), Williams
patent: 5297015 (1994-03-01), Miyazaki et al.
patent: 5349523 (1994-09-01), Inou et al.
patent: 5493485 (1996-02-01), Okado
APEC '93, Mar. 7, 1993, San Diego, CA, USA pp. 22-28, Lin, "Analysis of Fuzzy Control Method Applied to DC-DC Converter Control".
Intelec '91, Nov. 5, 1991, Kyoto, Japan, pp. 261-267, Ueno, Oota & Sasaki, "Regulation of Cuk Converters Using Fuzzy Controllers".

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