Abstract: A new kind of electricity transformer, which includes capactiors、diodes and switches, is introduced in this paper. It is an unilateralism-transforming device, which can dispart high import voltage under the case of inputing and outputing by turns, and output tow voltage of direct current. Its impedance transmitting ratio of input and output is N². "N"is the number of capacitance in it,D.C voltage divider includes switch- ing power and electricity-transformation, so that it can be used to design lower voltage of direct current power.

Key words: electricity transformation, D. C voltage divider, A. C transformer, transmitting ratio