抄録
Leakage inductance effects of the output transformer on the characteristics of a current-resonant parallel converter were studied by simulation and experiments. As a parasitic resonance between the leakage inductance and the resonance circuit capacitor occurs during the commutating period of the output rectifying circuit in every half-cycle, the larger the leakage inductance and the output current become, the more the capacitor voltage is increased. Consequently the following main resonance in every half-cycle between the resonance reactor and the resonance capacitor is enlarged. Thus, both the output voltage at a large output current and the maximum output power of the converter are increased. The controllability of the output voltage by switching frequency is also improved. The maximum output power is increased by about 20% by making the leakage inductance equal to the inductance of the resonance circuit reactor for a 50 kHz-15 W class converter.
