Patent ID: 6661205
Filing Date: 2003-12-09
Classification: H01M,Y02E

Abstract:
A capacitor charging method in which a resonant type inverter section is operated by driving pulses at a fixed frequency to generate an ac voltage, the ac voltage is converted to a dc voltage, and a capacitor is charged using the dc voltage, comprising the steps of:a first step where a first type of driving pulse of the driving pulses has a fixed driving pulse width W1 determined in advance, which charges the capacitor by a boost voltage &Dgr;Vn (n is a natural number, &Dgr;V1, &Dgr;V2, . . . ) at each input of the first type of driving pulse; and a second step which charges the capacitor by a single or a plurality of a second type of driving pulse having a controlled driving pulse width W2 (W1>W2) as required to increase the voltage of the capacitor by a voltage [V2âˆ’V1] when a charging voltage V1 of the capacitor reaches a value that satisfies [V2>V1>V2âˆ’V12.