FUZZY EQUIPPED MICROCOMPUTER CONTROLLED-TYPE POWER SUPPLY EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a power supply equipment which determines the optimum adjustment parameters for obtaining a primary current waveform of the same phase as a secondary voltage, using fuzzy inference and can prevent the appearance of higher harmonic waves. ;SOLUTION: A secondary voltage (e_a) is detected by a voltage detector 9 and primary current (i_a) is detected by a current detector 8. Then, a deviation 'e' (e=E-e_a) of the detected voltage (e_a) from a target value E of the secondary voltage is found. A deviation 'i' (i=I-i_a) of the detected current ia form a target value I of the primary current is also found by calculation. Judging whether e=0 and i=0, and if 'e' is not zero, a fuzzy inference is conducted using the deviation 'e' of the secondary voltage, and the peak value of the target current waveform is corrected. Similarly, a fuzzy inference is conducted using the deviation 'i' of the primary current and a RWM value is corrected so that the ON duty of a switching element 7 becomes larger or smaller.;COPYRIGHT: (C)1999,JPO