The design scheme,circuit,technical layout,solution of technique difficulties,characteristics and shape of mini-type low ripple DC-DC power supply with H2815D6WG applied in space system are presented in this article.

This power supply is reliable,volumeless and has low ripple output.

Taking advantage of coupled-inductor filter network,the requirement of low ripple is achieved without decrease of the dynamic performance of power supply.

This paper mainly introduced its successful application of twelve-phase low ripples inverting electric power source in energy conservation improvement of Cr-electroplated generator-motor group,it was a big push on extensive job for saving energy and lowering energy consumption.